JP5821059B2 - Uniaxial eccentric screw pump - Google Patents

Description

  The present invention relates to a single-shaft eccentric screw pump having a hopper for introducing a fluid to be pumped and in which a hopper and a rotor can be rotated together.

  The uniaxial eccentric screw pump or the positive displacement pump mechanism provided in the prior art is provided with a liquid feeding storage section composed of a hopper or casing for accommodating a fluid to be pumped, as shown in Patent Documents 1 to 3 below. There is something. In this type of pump, a seal device that serves as a shaft seal and a power rotation shaft are provided inside the liquid feed storage section, and the power transmission shaft is connected to a pump mechanism. In the pumps shown in Patent Documents 1 to 3, a liquid-feeding storage section such as a hopper is arranged independently of the others.

  Here, when the fluid to be pumped is a cake-like or viscous fluid, the fluid adheres to the wall surface of the liquid-feeding reservoir, resulting in a pump suction failure. Therefore, in order to suppress the occurrence of pump suction failure, in the conventional pump, a scraper, a feeder, a bridge breaker, or the like is provided to prevent the fluid from adhering to the wall surface of the liquid feeding storage section.

Japanese Patent Laid-Open No. 2007-126276 JP 2000-128358 A JP 2001-120246 A

  However, conventional pumps such as those disclosed in Patent Documents 1 to 3 described above tend to be large in overall configuration. For this reason, when the horizontal type is used like the pumps disclosed in Patent Documents 1 and 2, there is a problem that a large installation area is required. Moreover, when it is set as a vertical type like the pump currently disclosed by patent document 3, it will be accompanied by difficulty in the injection | throwing-in of the fluid with respect to liquid feeding storage parts, such as a hopper.

  Moreover, even if it is a case where it is a case where it is a case where it is supposed to assist the transfer of the fluid injected | thrown-in in the liquid feeding storage part like the pump currently disclosed by patent documents 1-3, it makes a screw pump mechanism. A fluid bridge or the like may occur in a region until reaching the stator inlet. Therefore, in the pump of the prior art, there is a problem that a part of the fluid charged in the liquid feeding storage part remains and cannot be pumped.

  Therefore, the present invention provides a single-shaft eccentric screw pump that has a compact device configuration, can easily input a fluid into the liquid-feeding reservoir, and can reliably pump the introduced fluid. It was aimed.

The uniaxial eccentric screw pump of the present invention provided to solve the above-described problem includes a liquid feeding storage section having an internal space for accommodating a fluid to be pumped, and a flow stored in the liquid feeding storage section . A male screw type rotor that pumps an animal and rotates eccentrically under power, a uniaxial eccentric screw pump mechanism including a stator having an inner peripheral surface formed into a female screw type, and the rotor and the feed when feeding a fluid. An eccentric rotation allowing means for allowing the eccentric rotation generated in the liquid storage section, and at least one end side of the stator is disposed in the internal space of the liquid supply storage section, and the rotor is the feed section. It is characterized by being able to rotate integrally with the liquid reservoir.

  In the uniaxial eccentric screw pump of the present invention, the rotor of the uniaxial eccentric screw pump mechanism can be rotated integrally with the liquid feeding storage section, and at least one end side portion of the stator is disposed in the liquid feeding storage section. Thus, by providing the uniaxial eccentric screw pump mechanism in the liquid-feeding reservoir, a device for the uniaxial eccentric screw pump in the vertical and horizontal directions as compared with a conventionally known horizontal or vertical uniaxial eccentric screw pump or the like. The configuration can be made compact.

  As described above, since the uniaxial eccentric screw pump of the present invention has a compact configuration, it is possible to provide an inlet or the like at a position where a fluid can be easily introduced into the liquid feeding storage section. Thereby, the work which replenishes a fluid to a liquid feeding storage part can be further labor-saving.

  Further, the uniaxial eccentric screw pump of the present invention provided by the same knowledge includes a liquid feeding storage section having an internal space for accommodating a fluid to be pumped, a male screw type rotor that rotates eccentrically under power, A uniaxial eccentric screw pump in which an inner peripheral surface is formed into a female screw type, the rotor is inserted into the stator, fluid is sucked from one end side of the stator, and discharged from the other end side A mechanism is formed, the rotor is erected in the internal space of the liquid-feeding storage section, the rotor and the liquid-feeding storage section are integrally rotatable, and one end side of the stator is It is arrange | positioned in the internal space of the said liquid feeding storage part.

  In the uniaxial eccentric screw pump of the present invention, the rotor is erected in the internal space of the liquid feeding storage part, and the rotor and the liquid feeding storage part can rotate integrally. Further, in the uniaxial eccentric screw pump of the present invention, since the uniaxial eccentric screw pump mechanism is provided in the liquid feeding storage section by inserting the rotor into the stator, a conventionally known horizontal installation type or vertical installation type is provided. Compared to a single-shaft eccentric screw pump or the like, the apparatus configuration is compact in the vertical direction and horizontal direction.

  Moreover, since the uniaxial eccentric screw pump of this invention is a compact structure, it can provide an injection port etc. in the position which is easy to throw in a fluid with respect to a liquid feeding storage part. Thereby, the work which replenishes a fluid to a liquid feeding storage part can be further labor-saving.

  The uniaxial eccentric screw pump according to the present invention includes an eccentric rotation permissible means for guiding the eccentric rotation of the rotor and the liquid feeding storage section, and the eccentric rotation permissible means is disposed below the liquid feeding storage section. It is desirable that it is installed.

  According to such a configuration, the eccentric rotation of the rotor and the liquid feeding storage unit can be allowed while the pressure acting from the liquid feeding storage unit side is received by the eccentric rotation allowing unit. As a result, the center of gravity position can be set at a lower position as compared with the case where the eccentric rotation allowing means is installed upward, and the stability of the apparatus can be improved.

  In the uniaxial eccentric screw pump of the present invention, it is preferable that the eccentric rotation permissive means is constituted by a linear guide device.

  According to such a configuration, it is possible to smoothly eccentrically rotate the rotor and the liquid feeding storage unit while reliably receiving the pressure acting from the liquid feeding storage unit side. Moreover, according to the structure mentioned above, an apparatus structure can be made compact in an up-down direction, and it can avoid that the injection | throwing-in position of the fluid with respect to a liquid feeding storage part becomes high. Thereby, the operation | work which throws in the fluid to be pumped into a liquid feeding storage part can be facilitated, suppressing the installation space of a uniaxial eccentric screw pump to the minimum.

In the uniaxial eccentric screw pump of the present invention, a liquid-feeding reservoir having an internal space for accommodating a fluid to be pumped , an outer rotor having a through-hole with an inner peripheral surface formed in a female screw shape, and the through-hole A uniaxial eccentric screw pump mechanism having a male screw-like inner rotor inserted into the hole, and the outer rotor rotates in conjunction with the rotation of the inner rotor, whereby a fluid is introduced into the through-hole. , The outer rotor functions as an eccentric rotation permission means for allowing eccentric rotation generated in the inner rotor and the liquid feeding storage section when fluid is pumped, At least one end side of the outer rotor is disposed in the internal space of the liquid feeding storage section, and the inner rotor can rotate integrally with the liquid feeding storage section. It is characterized in that.

  In such a configuration, it is possible to allow and receive the eccentric rotation that occurs with the pumping of the fluid by the outer rotor constituting the uniaxial eccentric screw pump mechanism, and to prevent the eccentric rotation of the liquid feeding storage unit and the like. Is possible. Thereby, it becomes possible to further simplify the apparatus configuration of the uniaxial eccentric screw pump.

  The uniaxial eccentric screw pump according to the present invention preferably includes a driving machine for rotating the rotor, and the driving machine is installed on the lower side with respect to the liquid feeding storage unit.

  With this configuration, the device configuration can be made compact. In addition, since the driving device that is a heavy load is installed on the lower side of the liquid feeding storage section, it is possible to improve the stability of the uniaxial eccentric screw pump during the fluid feeding operation.

  The uniaxial eccentric screw pump of the present invention has a stay member having one end fixed to the stator and the other end fixed to another member, and the stay member is provided in the liquid feeding storage section. Is preferred.

  In such a configuration, it is possible to prevent a fluid bridge or the like from being generated in the liquid feeding storage unit and the fluid from remaining in the liquid feeding storage unit.

  Moreover, in the uniaxial eccentric screw pump of this invention mentioned above, it is preferable that the said stay member is installed so that the internal peripheral surface of the said liquid feeding storage part may be followed.

  In such a configuration, the stay member can scrape off the fluid adhering to the inner peripheral surface of the liquid feeding storage section, and prevent the occurrence of bridging of the fluid in the liquid feeding storage section. it can. Thereby, it can prevent that a fluid remains in a liquid feeding storage part.

  Furthermore, in the uniaxial eccentric screw pump of the present invention, it is preferable that a plurality of the stay members are provided in the circumferential direction of the stator.

  By adopting such a configuration, the stator can be reliably positioned and fixed regardless of the influence of the fluid charged in the liquid feeding storage section.

  In the uniaxial eccentric screw pump of the present invention, it is preferable that a counter balancer is provided on one or both of the liquid feeding storage section and the other member that rotates eccentrically following the liquid feeding storage section.

  According to this configuration, it is possible to prevent the liquid-feeding storage unit from being out of balance with the eccentric rotation, and to stabilize the operation of the liquid-feeding storage unit.

  The uniaxial eccentric screw pump of the present invention may be provided with an eccentricity restricting means for restricting the eccentric rotation of the liquid feeding storage part by contacting the outer peripheral surface of the liquid feeding storage part.

  According to this configuration, it is possible to limit the operation of the liquid feeding storage unit so that the liquid feeding storage unit rotates eccentrically within an appropriate range. Thereby, it can prevent that a liquid feeding storage part loses a balance with eccentric rotation, and can stabilize operation | movement of a liquid feeding storage part.

  In the uniaxial eccentric screw pump of the present invention, a driving machine for rotating the rotor is installed on the lower side with respect to the liquid feeding storage part, and the rotor is connected to the driving machine side. It is installed in a state of facing downward, and an insertion part into which the connection part can be inserted is provided at the bottom of the liquid-feeding storage part, and the connection part is inserted into the insertion part and connected. It is desirable that the rotor and the liquid feeding storage unit can be integrated.

  In the uniaxial eccentric screw pump of the present invention, the rotor and the liquid feeding storage unit can be integrated by inserting and connecting the connecting portion of the rotor to the insertion part provided at the bottom of the liquid feeding storage unit. Therefore, in the single-shaft eccentric screw pump of the present invention, the rotor can be replaced as appropriate, and manufacturing and maintenance are easy. In the uniaxial eccentric screw pump of the present invention, it is possible to select and use various rotors prepared in advance in consideration of the application, the properties of the fluid, and the like.

  In the uniaxial eccentric screw pump according to the present invention, a reduction portion formed so that a cross-sectional area of the inner space is reduced toward a bottom portion is provided in the liquid feeding storage portion, and one end side of the stator is the reduction portion. It is preferable that it is opened in the part.

  By adopting such a configuration, it is possible to smoothly collect the fluid charged in the liquid feeding storage part in the reduction part and suck it from the opening provided on one end side of the stator. Thereby, it becomes possible to pump the fluid introduced into the liquid feeding storage unit without remaining in the liquid feeding storage unit.

  According to the present invention, it is possible to provide a single-shaft eccentric screw pump that has a compact device configuration, can easily input a fluid into the liquid-feeding reservoir, and can reliably pump the introduced fluid. .

It is sectional drawing which shows the internal structure of the uniaxial eccentric pump which concerns on one Embodiment of this invention. It is a top view which shows the uniaxial eccentric screw pump shown in FIG. It is an exploded view which concerns on the principal part of the uniaxial eccentric screw pump shown in FIG. (A) is a principal part expanded sectional view which shows the modification of the uniaxial eccentric screw pump shown in FIG. 1, (b) is a perspective view which shows the eccentric rotation permissible means employ | adopted in (a). It is sectional drawing which shows the modification of the uniaxial eccentric screw pump shown in FIG. It is a top view which shows the uniaxial eccentric screw pump which provided the stay member which concerns on a modification. It is sectional drawing which shows the internal structure which shows the modification of the uniaxial eccentric screw pump which employ | adopted the twin rotor type uniaxial eccentric screw pump mechanism.

  A uniaxial eccentric screw pump 10 according to an embodiment of the present invention will be described in detail with reference to the drawings. As shown in FIGS. 1 and 2, the uniaxial eccentric screw pump 10 includes a liquid feeding storage unit 20 for charging and storing a fluid to be pumped, and a uniaxial eccentric screw pump mechanism unit for pumping the fluid. 50 (hereinafter also simply referred to as “pump mechanism 50”). Further, the uniaxial eccentric screw pump 10 includes a driving machine 70 for driving the pump mechanism unit 50, an eccentric rotation permitting means 80, and an eccentricity limiting means 40. The uniaxial eccentric screw pump 10 has a configuration in which constituent members such as a liquid feeding storage unit 20, a pump mechanism unit 50, a driving machine 70, an eccentric rotation permission unit 80, and an eccentricity limiting unit 40 are assembled to the housing 12.

  The liquid feeding storage unit 20 is installed in the housing 12 of the uniaxial eccentric screw pump 10. The liquid feeding storage unit 20 is integrally rotatable with the rotor 62 of the pump mechanism unit 50 described in detail later. The liquid feeding storage unit 20 is hollow, and a fluid to be pumped can be fed into the internal space 22 through the charging port 14 provided on the top surface 12a of the housing 12. The liquid feeding storage unit 20 has a cylindrical appearance on the upper side and a conical appearance on the lower side. In the liquid feeding storage unit 20, the cross-sectional area of the internal space 22 is reduced in the portion having the conical appearance shape (reduction unit 24) toward the bottom 26 side.

  A flange portion 28 that protrudes outward is provided on the outer periphery of the liquid feeding storage portion 20 and in the vicinity of the boundary between the cylindrical portion (cylindrical portion 23) and the conical portion (reducing portion 24). Yes. The flange portion 28 is formed over substantially the entire circumference of the liquid feeding storage portion 20, and a counter balancer 30 is attached to a part of the flange portion 28. The counter balancer 30 is provided in order to balance the liquid feeding storage section 20 that rotates eccentrically. The counter balancer 30 is constituted by a weight 30a made of one or a plurality of metal plates having a predetermined weight, and the total weight can be adjusted by adjusting the quantity of the weight 30a.

  Further, an eccentricity limiting means 40 is attached to the housing 12 as a means for limiting the eccentric rotation of the liquid feeding storage unit 20. The eccentricity limiting means 40 is configured by a conventionally known caster, and can be brought into contact with the outer peripheral surface of the cylindrical portion 23 constituting the liquid feeding storage portion 20. Thereby, the eccentric rotation area | region is restrict | limited so that the liquid feeding storage part 20 may not rotate eccentrically too much.

  As shown in FIGS. 1 and 3, an insertion portion 32 is provided at the bottom portion 26 of the liquid feeding storage portion 20. The insertion portion 32 is for inserting and connecting the rotor 62 of the pump mechanism portion 50 and the drive shaft 74 of the drive machine 70, which will be described in detail later, and has a cylindrical appearance. A pin hole 32a is formed in the insertion portion 32, and the pin 34 for connecting the rotor 62 and the drive shaft 74 can be inserted so as to traverse in the radial direction.

  The pump mechanism 50 is a so-called rotary displacement pump mechanism, and as shown in FIG. 1, a main part is constituted by a stator 52 and a rotor 62. The stator 52 is obtained by attaching a substantially cylindrical lining member 58 made of an elastic body such as rubber or a resin to the inside of a cylindrical stator storage cylinder 56. The material of the lining member 58 is appropriately selected according to the type and properties of the fluid that is the object to be transferred using the uniaxial eccentric screw pump 10. An inner peripheral surface 54a of the through-hole 54 formed in the lining member 58 has a single-stage or multi-stage female screw shape with n strips. In the present embodiment, as shown in FIG. 1 and FIG.

  The stator 52 is installed in a substantially upright state in the liquid feeding storage section 20 as shown in FIG. 1, and is fixed by a plurality of stay members 60 mounted substantially radially on the outer periphery of the stator storage cylinder 56 as shown in FIG. Has been. The stay member 60 is a long and bent steel material. The stay member 60 is bent in a shape along the inner peripheral surface of the liquid feeding storage unit 20. Specifically, the stay member 60 has an inclined portion 60b that continues to the connecting portion 60a that extends substantially horizontally toward the radially outer side with respect to the stator storage cylinder 56, and a vertical portion 60c that continues to the inclined portion 60b.

  The inclination of the inclined portion 60 b is substantially the same as the inclination of the reducing portion 24 that forms the liquid feeding storage portion 20. The inclined portion 60 b is disposed along the reduced portion 24, and the vertical portion 60 c is disposed along the cylindrical portion 23. A gap is formed between the inclined portion 60b and the vertical portion 60c and the liquid feeding storage portion 20 so as not to contact even if the liquid feeding storage portion 20 rotates eccentrically. The stay member 60 is fixed by connecting the end of the connecting portion 60 a to the stator storage cylinder 56 and connecting the end of the vertical portion 60 c to the top surface 12 a side of the housing 12.

  One end side (lower end side) of the stator 52 is disposed in the liquid feeding storage unit 20 and reaches the vicinity of the bottom, specifically, the reduction unit 24. Between the one end part (lower end part) of the stator 52 and the bottom part 26 of the liquid feeding storage part 20, there is a gap that allows fluid to flow in and out between the stator 52 and the liquid feeding storage part 20. Is provided. Further, the other end side of the stator 52 passes through the top surface 12 a of the housing 12 and is taken out of the housing 12.

  The rotor 62 is a metal shaft, and has a single-stage or multi-stage female screw shape with n-1 strips. In the present embodiment, the rotor 62 is multi-stage with one line. The rotor 62 is formed so that the cross-sectional shape thereof is almost a perfect circle when viewed in cross section at any position in the longitudinal direction. The rotor 62 can be freely eccentrically rotated inside the through hole 54 by being inserted into the through hole 54 of the stator 52 described above.

  As shown in FIG. 3, a connection portion 64 that can be inserted into the insertion portion 32 of the liquid feeding storage portion 20 described above is provided on one end side of the rotor 62. Further, the connection portion 64 is provided with a pin hole 64a. The rotor 62 is integrated with the liquid feeding storage section 20 by inserting the connection section 64 into the insertion section 32 of the liquid feeding storage section 20 and inserting and connecting the pin 34 over the pin holes 32a and 64a. Yes. Thereby, the rotor 62 is in a state of being erected at a substantially central portion of the liquid feeding storage unit 20. As will be described in detail later, the rotor 62 is also connected to the drive shaft 74 of the drive machine 70 by the pin 34 in the insertion portion 32. Thereby, the rotor 62 can receive the rotational power output from the drive machine 70 and rotate integrally with the liquid feeding storage unit 20.

  When the rotor 62 is inserted into the stator 52, the outer peripheral surface 62a of the rotor 62 and the inner peripheral surface 54a of the stator 52 are in contact with each other across the tangent line between the inner peripheral surface 54a and the outer peripheral surface 62a. A fluid conveyance path 66 (cavity) is formed. The fluid conveyance path 66 has a length d times the reference length S of the lead in the axial direction of the stator 52 and the rotor 62 when the length L of the lead of the stator 52 and the rotor 62 is set as the reference length S. It is a multistage (d stage) flow path.

  The fluid conveyance path 66 extends in a spiral shape in the longitudinal direction of the stator 52 and the rotor 62. Further, when the rotor 62 is rotated in the through hole 54 of the stator 52, the fluid conveyance path 66 advances in the longitudinal direction of the stator 52 while rotating in the stator 52. Therefore, when the rotor 62 is rotated, the fluid is sucked into the fluid conveyance path 66 from one end side of the stator 52 and the fluid is confined in the fluid conveyance path 66 toward the other end side of the stator 52. It can be transferred and discharged on the other end side of the stator 52. That is, by rotating the rotor 62, the fluid sucked from one end side can be pumped and discharged from the other end side. By switching the rotation direction of the rotor 62 forward and reverse, the fluid pumping direction can be changed. Switching is possible.

  The uniaxial eccentric screw pump 10 of the present embodiment mainly performs an operation of sucking up the fluid charged in the liquid feeding storage unit 20 from one end (lower end) of the stator 52 and discharging it from the other end (upper end). It is the purpose. Accordingly, during normal operation, the rotor 62 rotates in a direction (positive direction) in which the fluid is sucked from the lower end side of the stator 52 and can be discharged from the upper end side. Further, when necessary for cleaning or the like, the rotor 62 is rotated in the reverse direction, and the fluid can be pumped from the upper end side to the lower end side of the stator 52.

  A drive unit 70 and an eccentric rotation permission unit 80 are provided below the liquid feeding storage unit 20 described above. As shown in FIGS. 1 and 3, the drive machine 70 has a drive shaft 74 that is rotationally driven by the power of a motor 72. The drive shaft 74 protrudes in a direction (substantially orthogonal direction) intersecting the shaft center direction of the shaft portion 76 and the shaft portion 76 inserted into the insertion portion 32 provided in the bottom portion 26 of the liquid feeding storage portion 20. And a flange portion 78 provided as described above. The drive shaft 74 is rotatably supported by a bearing 79 or the like provided between the flange portion 78 and the main body of the drive machine 70.

  The shaft portion 76 is provided with a pin hole 76a into which the pin 34 can be inserted. When the shaft portion 76 is inserted into the insertion portion 32 of the liquid feeding storage portion 20 from below and the rotor 62 is inserted into the insertion portion 32 from above, the pin holes 32a, 64a, and 76a communicate with each other. The drive shaft 74 of the drive machine 70 is integrated with the liquid feeding storage unit 20 and the rotor 62 by the pins 34 inserted through the respective pin holes 32a, 64a, 76a. Further, the flange portion 78 is fixed to the bottom surface of the liquid feeding storage portion 20 in a state where the shaft portion 76 is inserted from below into the insertion portion 32 of the liquid feeding storage portion 20. As a result, the lower opening of the insertion portion 32 is completely closed. Further, the drive unit 70 integrally rotates together with the rotor 62 and the liquid feeding storage unit 20 when the fluid is pumped. That is, the drive shaft 74 of the drive machine 70 performs an operation of revolving while rotating in the same manner as the liquid feeding storage unit 20 and the rotor 62.

  The driving machine 70 is mounted on the table 82 of the eccentric rotation permitting means 80 installed on the bottom surface 12 b of the housing 12. The eccentric rotation permission means 80 is provided to allow and guide the eccentric rotation of the liquid feeding storage unit 20, the rotor 62, and the driving machine 70. The eccentric rotation permission means 80 may be anything as long as it permits and guides the eccentric rotation of the liquid feeding storage unit 20 and the like, but in this embodiment, a linear motion guide device (XY linear guide) is used. It has been adopted. In the linear motion guide device that constitutes the eccentric rotation allowing means 80, the table 82 can operate smoothly and freely in the horizontal direction (XY direction).

  Next, the operation of the uniaxial eccentric screw pump 10 will be described. When the drive unit 70 is operated to rotate the drive shaft 74 in the forward direction, the rotor 62 and the liquid feeding storage unit 20 connected to the drive shaft 74 by the pin 34 are eccentrically rotated. Along with the rotation of the rotor 62, a fluid conveyance path 66 formed between the rotor 62 and the stator 52 advances from the lower end side of the stator 52 toward the upper end side while rotating in the stator 52. Thereby, the fluid stored in the liquid feeding storage unit 20 is sucked from the opening formed in the lower end portion of the stator 52, is pumped upward, and is discharged from the upper end portion of the stator 52.

  When the fluid feed is started as described above, both the liquid feeding storage unit 20 and the rotor 62 rotate eccentrically, and the drive unit 70 and the table 82 linearly move (revolve) in the horizontal direction (XY direction). To do. Moreover, the liquid feeding storage part 20 performs eccentric rotation in a stable state within a predetermined range while being guided by the eccentricity limiting means 40.

  When the liquid feeding storage unit 20 rotates eccentrically, the stay member 60 installed for fixing the stator 52 serves as a scraper for the fluid stored in the liquid feeding storage unit 20. Thereby, it can avoid that a fluid raise | generates a bridge | bridging etc. in the liquid feeding storage part 20. FIG. Further, with the eccentric rotation of the rotor 62, the fluid prepared in the internal space 22 of the liquid feeding storage unit 20 is sucked into the fluid conveyance path 66 formed in the stator 52, and the upper end side of the stator 52 It is pumped towards.

  As described above, in the uniaxial eccentric screw pump 10 of the present embodiment, the rotor 62 is erected in the internal space 22 of the liquid feeding storage unit 20, and the rotor 62 and the liquid feeding storage unit 20 can rotate integrally. It is said that. In addition, the pump 52 is formed by inserting the stator 52 into the internal space 22 of the liquid feeding storage unit 20 and inserting the rotor 62 into the stator 52. Therefore, the uniaxial eccentric screw pump 10 has a compact device configuration in the vertical direction and the horizontal direction. In addition, since the apparatus configuration is compact in the vertical direction, the input port 14 is provided at a position where the fluid can be easily input, and the fluid replenishment work can be further saved.

  Further, the uniaxial eccentric screw pump 10 is configured such that the drive unit 70 and the eccentric rotation permissible means 80 are installed on the lower side with respect to the liquid feeding storage unit 20, and the eccentric rotation of the rotor 62 and the liquid feeding storage unit 20 is allowed. However, an increase in size toward the upper side can be avoided. Further, by installing the driving device 70 and the eccentric rotation allowing means 80 on the lower side, the center of gravity position of the uniaxial eccentric screw pump 10 can be set to a position close to the installation surface. Thereby, even if the liquid feeding storage part 20 and the rotor 62 rotate eccentrically, it becomes possible to continue operation without impairing stability.

  Further, in the uniaxial eccentric screw pump 10, since the eccentric rotation allowing means 80 is constituted by a linear motion guide device, the rotor 62 and the liquid supply / storage are received while reliably receiving the pressure acting from the liquid supply / storage part 20 side. It is possible to smoothly rotate the part 20 eccentrically. In the present embodiment, as the eccentric rotation permitting means 80, a configuration in which a linear motion guide device capable of operating in the XY direction while maintaining the horizontal state of the table 82 is exemplified, but the present invention is not limited thereto. It is not necessarily limited, and any material may be used as long as it can guide the eccentric movement of the liquid feeding storage section and the rotor 62.

  Specifically, in the eccentric rotation permitting means 90 shown in FIG. 4, a guide shaft 92 extending downward is provided on an extension line of the rotor 62, and a guide plate 94 is provided below the driving machine 70. As shown in FIG. 4B, the guide plate 94 is formed with a guide portion 96 formed of holes or grooves in accordance with the eccentric movement trajectories of the liquid feeding storage portion 20 and the rotor 62. A shaft 92 is inserted. Even in the case where such an eccentric rotation permissible means 90 is provided, as in the case where the eccentric rotation permissible means 80 is provided, while allowing the eccentric rotation of the rotor 62 and the liquid-feeding storage unit 20 within a certain range, upward. It is possible to avoid an increase in size toward the target.

  Further, in place of the above-described eccentric rotation permitting means 80, 90, bearings such as ball bearings are arranged in two rows, and by these, the eccentric rotation of the liquid-feeding storage unit 20 and the rotor 62, that is, the rotation and revolution movements are received. Is possible. Further, when the eccentric movement regions of the liquid feeding storage unit 20 and the rotor 62 are small, the eccentric movement is received by providing an elastic body such as rubber or a spring instead of providing the eccentric rotation permitting means 80 and 90 described above. You may do it.

  In the present embodiment, a plurality of stay members 60 that are radially attached to the outer periphery of the stator storage cylinder 56 for fixing the stator 52 are provided in the internal space 22 of the liquid feeding storage unit 20. Therefore, when the liquid feeding storage part 20 rotates with the fluid feeding, the fluid bridging or the like can be prevented in the internal space 22. In addition, since the stay member 60 is installed along the inner peripheral surface of the liquid feeding storage unit 20, the stay member 60 serves as a scraper, and the stay member 60 serves as an inner peripheral surface of the liquid feeding storage unit 20. The effect of scraping off the attached fluid is obtained. Thereby, it can prevent that a fluid remains in the liquid feeding storage part 20. FIG.

  In the present embodiment, a configuration in which a plurality of stay members 60 are radially fixed to the outer periphery of the stator 52 is illustrated, but the present invention is not limited to this, and the number of installations, installation positions, and the like are appropriately changed. Is possible. Further, the above-described stay member 60 has a bent shape along the inner peripheral surface of the liquid feeding storage unit 20, but the shape, size, and the like of the stay member 60 can be changed as appropriate. Further, instead of the stay member 60, or the stay member 60, a means for solving the problem that the fluid remains attached to the inner peripheral surface of the liquid feeding storage unit 20 or that the fluid is in a bridge state or the like. It is possible to provide in addition to.

  The modification of the stay member 60 will be described more specifically. As shown in FIG. 6, the stay member 60 may have a shape curved in a scroll shape from the connection portion 60 a to the inclined portion 60 b. More specifically, in the example shown in the above embodiment, the stay member 60 is formed so as to extend linearly from the connecting portion 60a to the inclined portion 60b when viewed from above (FIGS. 1 and 2). reference). On the other hand, in the example shown in FIG. 6, in the intermediate part from the base end of the connecting portion 60a to the end of the inclined portion 60b, the rotation direction of the liquid feeding storage portion 20 and the rotor 62 (the direction indicated by the arrow in FIG. 6). A stay member 60 is formed to be curved so as to bulge out. By adopting the shape as shown in FIG. 6, an effect is obtained in which the fluid stored in the liquid feeding storage unit 20 is more likely to gather toward the substantially central side of the liquid feeding storage unit 20. Is easily sucked from the end of the stator 52.

  As described above, since the uniaxial eccentric screw pump 10 is provided with the counter balancer 30 in the liquid feeding storage unit 20, the liquid feeding storage unit 20 is prevented from being out of balance with the eccentric rotation, Operation | movement of the liquid feeding storage part 20 can be stabilized. In addition, even if the counter balancer 30 is not present, the counter balancer 30 can be omitted if the liquid feeding storage unit 20 can rotate in a stable state.

  In addition, the counter balancer 30 described above is not necessarily installed in the liquid feeding storage unit 20. For example, the counter balancer 30 follows the liquid feeding storage unit 20 instead of or in addition to the liquid feeding storage unit 20. Then, a weight corresponding to the counter balancer 30 may be installed on the other member that rotates eccentrically. Specifically, a shaft extending downward on the extended line of the rotor 62 is provided, and by attaching a flywheel or the like to this shaft, the liquid feeding storage unit 20 is eccentrically rotated in the same manner as when the counter balancer 30 is provided. Can be stabilized.

  Further, in the uniaxial eccentric screw pump 10, an eccentricity limiting means 40 made of casters or the like is provided outside the liquid feeding storage unit 20. Thereby, the liquid feeding storage part 20 can be eccentrically rotated in a stable state without exceeding a predetermined range. In the present embodiment, the configuration provided with the eccentricity limiting means 40 is exemplified, but when the eccentric rotation width of the liquid feeding storage unit 20 is small or when the eccentric rotation can be sufficiently limited by the eccentric rotation permission means 80 or the like. Alternatively, the eccentricity limiting means 40 may be omitted.

  In the uniaxial eccentric screw pump 10 of the present embodiment, the connection portion 64 of the rotor 62 is inserted into the insertion portion 32 provided in the bottom portion 26 of the liquid feeding storage portion 20, thereby pinning the rotor 62 and the liquid feeding storage portion 20. 34 can be integrated. Therefore, it is possible to replace the rotor 62 as appropriate, and it is easy to manufacture and maintain. Further, it is possible to select and use an appropriate one from various rotors 62 prepared in advance according to the application.

  In the present embodiment, the liquid supply storage unit 20 and the rotor 62 can be integrated or disassembled by attaching and detaching the pins 34 so that the rotor 62 can be appropriately replaced. However, the present invention is not limited thereto. It is not necessarily limited, and it is also possible to adopt a configuration in which the liquid feeding storage unit 20 and the rotor 62 are integrated by welding or the like. Moreover, the connection structure of the liquid feeding storage part 20 and the rotor 62 is not limited to what was mentioned above, It can change suitably.

  In the uniaxial eccentric screw pump 10 of the present embodiment, the liquid feeding storage unit 20 is provided with a reduction unit 24, which has a shape of a dent toward the bottom. For this reason, the fluid introduced into the liquid feeding storage unit 20 tends to gather at the bottom 26. Further, since one end portion (lower end portion) of the stator 52 is opened in the reduced portion 24, the fluid collected near the bottom portion 26 can be sucked smoothly. As a result, the fluid introduced into the liquid feeding storage unit 20 can be pumped without remaining in the liquid feeding storage unit 20.

  Although the reduction part 24 illustrated in the present embodiment is configured by a linear inclined surface, the present invention is not limited to this, and may be configured by a curved surface or the like. Moreover, the liquid feeding storage part 20 does not necessarily need to be provided with the reduction | decrease part 24, and may be a cylinder type thing.

  In the present embodiment, the liquid supply storage unit 20 and the pump mechanism unit 50 are provided so as to be substantially upright. However, these need not be substantially upright, and the liquid supply storage unit 20 or the pump is not necessarily required to be upright. Either one or both of the mechanism units 50 may be inclined. Moreover, the uniaxial eccentric screw pump 10 may be a horizontal type as shown in FIG. In the case of the horizontal installation type, as shown in FIG. 5, measures such as providing a lid 100 on the open end side of the liquid feeding storage unit 20 and providing a seal member 102 between the lid 100 and the liquid feeding storage unit 20 are provided. It is preferable to prevent leakage of the fluid by taking

  The pump mechanism unit 50 employed in the uniaxial eccentric screw pump 10 described above is such that the liquid feeding storage unit 20 and the rotor 62 rotate eccentrically. However, the present invention is not limited to this, and for example, conventionally known Like the twin rotor type single-shaft eccentric screw pump mechanism, the liquid feeding storage unit 20 and the rotor 62 may be capable of pumping fluid without eccentric rotation. Specifically, the pump mechanism 50 can be rotated by an externally threaded inner rotor connected to the drive shaft of the drive machine, an outer rotor composed of a cylindrical body having an inner peripheral surface formed into an internal thread shape, and the outer rotor. By providing the casing having a storage space that can be stored as described above, the liquid feeding storage unit 20 and the rotor 62 can be configured not to rotate eccentrically.

  More specifically, in the present embodiment, the configuration in which the stator 52 is integrated with the stator storage cylinder 56 and the lining member 58 by bonding or the like is illustrated, but the lining member 58 is arranged around the axis with respect to the stator storage cylinder 56. The twin-rotor type uniaxial eccentric screw pump mechanism described above can be configured by mounting it so as to be freely rotatable. In such a configuration, the rotor 62 functions as the inner rotor described above. Further, the lining member 58 functions as an outer rotor, and the stator storage cylinder 56 functions as a casing that houses the outer rotor.

  By making the pump mechanism 50 of the above-described twin rotor type configuration, the eccentric rotation generated when the fluid is pumped is received by the lining member 58 of the stator 52, and the liquid feeding storage unit 20 and the rotor 62 rotate eccentrically. Can be prevented. Thereby, it is not necessary to employ the eccentricity limiting means 40 and the eccentric rotation allowing means 80, and the device configuration of the uniaxial eccentric screw pump 10 is further simplified.

  When the pump mechanism unit 50 is of the twin rotor type, the stator storage cylinder 56 and the lining member 58 constituting the stator 52 are not bonded as described above, and the lining member 58 can be freely rotated in the stator storage cylinder 56. The pump mechanism unit 150 is not limited to the housed configuration, and the pump mechanism unit 150 is configured to rotatably support a member corresponding to the stator 52 in which the stator storage cylinder 56 and the lining member 58 are integrated by bonding. It is also possible to adopt instead.

  Specifically, as shown in FIG. 7, in the pump mechanism section 150, a member having the same configuration as the stator 52 described above is an outer rotor 152, and a member having the same configuration as the rotor 62 is an inner rotor 162. . The inner rotor 162 is inserted into the through hole 54 provided in the outer rotor 152. The inner rotor 162 is connected to the drive device 72.

  In the uniaxial eccentric screw pump 10 illustrated in FIG. 7, a bearing bush 110 capable of receiving a thrust load and a radial load is provided on the outer rotor 152, and a housing for the bearing bush 110 is provided at the connection portion 60 a of the stay member 60. 112 is provided. The bearing bush 110 can rotatably support the lower end portion of the outer rotor 152 while receiving a reaction force caused by rotation (radial direction) and discharge pressure. Since the bearing bush 110 is in contact with the fluid (liquid) in the liquid feeding storage unit 20, it is not formed of a commonly used bearing bearing or the like, but is formed of engineering plastic or a metal having excellent corrosion resistance. It is preferable. A bearing bush 116 is provided on the top surface 12 a of the housing 12 so as to surround the outer periphery on the upper end side of the outer rotor 152. The bearing bush 116 is not provided in a portion that comes into contact with the fluid (liquid) in the liquid feeding storage unit 20 like the bearing bush 110 described above. Therefore, a conventionally known ball bearing or roller bearing can be used for the bearing bush 116. Further, a housing member 118 for the swivel joint 114 and the bearing bush 116 is connected, and the housing member 118 is used as a discharge nozzle.

  By adopting the configuration shown in FIG. 7 described above, the outer rotor 152 and the rotor 162 can freely rotate around the axis. When the rotor 162 is rotated in such a state, the outer rotor 152 rotates with respect to the rotor 162 at a rotation ratio of 1: 2. As a result, the fluid is sucked into the fluid conveyance path 66 (cavity) formed between the outer rotor 152 and the rotor 162 from the lower end side of the outer rotor 152, and the discharge nozzle (housing member 118 side provided above) ).

  When the pump mechanism 150 as shown in FIG. 7 is adopted, the eccentric rotation generated when the fluid is pumped is received by the outer rotor 152, and the liquid feeding storage unit 20 and the rotor 162 can be prevented from rotating eccentrically. Therefore, it is not necessary to provide the eccentricity limiting means 40 and the eccentric rotation allowing means 80, and the apparatus configuration of the uniaxial eccentric screw pump 10 can be simplified correspondingly. Moreover, since it is not necessary to provide the eccentric rotation permission means 80, the uniaxial eccentric screw pump 10 can be reduced in size in the vertical direction. Therefore, the position of the charging port 14 is provided further downward, and the fluid charging operation can be facilitated.

  When the configuration shown in FIG. 7 is adopted, the stator storage cylinder 56 of the outer rotor 152 rotates in the liquid feeding storage unit 20. Therefore, as shown in FIG. 7, by providing stirring means 120 such as a screw on the outer periphery of the stator storage cylinder 56, the fluid stored in the liquid feeding storage unit 20 can be stirred by the stirring means 120. It becomes. Thereby, it is possible to generate a fluid bridge or the like in the liquid feeding storage unit 20.

  The uniaxial eccentric screw pump of the present invention can be suitably used for pumping pasty foods such as miso.

DESCRIPTION OF SYMBOLS 10 Uniaxial eccentric screw pump 20 Liquid supply storage part 22 Internal space 24 Reduction | decrease part 26 Bottom part 30 Counter balancer 40 Eccentric restriction means 50,150 Pump mechanism part 52 Stator 60 Stay member 62 Rotor 70 Driver 80, 90 Eccentric rotation permissible means 152 Outer Rotor 162 Inner rotor

Claims (13)

A liquid-feeding reservoir having an internal space for accommodating a fluid to be pumped;
A uniaxial eccentric screw pump mechanism including a male screw type rotor that pumps a fluid stored in the liquid feeding storage unit and receives eccentric power to rotate eccentrically, and a stator having an inner peripheral surface formed into a female screw type ;
Eccentric rotation permission means for allowing eccentric rotation generated in the rotor and the liquid-feeding reservoir when the fluid is pumped,
At least one end side of the stator is disposed in the internal space of the liquid feeding storage unit,
The uniaxial eccentric screw pump, wherein the rotor is rotatable integrally with the liquid feeding storage section. The uniaxial eccentric screw pump according to claim 1 , wherein the eccentric rotation permissible means is installed on the lower side with respect to the liquid feeding storage section. The uniaxial eccentric screw pump according to claim 1 or 2 , wherein the eccentric rotation permissible means is constituted by a linear motion guide device. A liquid-feeding reservoir having an internal space for accommodating a fluid to be pumped;
A male threaded rotor that rotates eccentrically under power,
A stator having an inner peripheral surface formed into a female screw type,
The rotor is inserted into the stator, a uniaxial eccentric screw pump mechanism capable of sucking a fluid from one end side of the stator and discharging from the other end side is formed,
The rotor is erected in the internal space of the liquid feeding storage unit, and the rotor and the liquid feeding storage unit are integrally rotatable,
One-shaft eccentric screw pump, wherein one end side of the stator is disposed in an internal space of the liquid-feeding reservoir. A drive for rotating the rotor;
The uniaxial eccentric screw pump according to any one of claims 1 to 4 , wherein the driving machine is installed on a lower side with respect to the liquid feeding storage unit. One end is fixed to the stator, and the other end has a stay member fixed to another member,
The uniaxial eccentric screw pump according to any one of claims 1 to 5 , wherein the stay member is provided in the liquid feeding storage section. The uniaxial eccentric screw pump according to claim 6 , wherein the stay member is installed along an inner peripheral surface of the liquid feeding storage section. The uniaxial eccentric screw pump according to claim 6 or 7 , wherein a plurality of the stay members are provided in a circumferential direction of the stator. The counter balancer is provided in any one or both of the said liquid feeding storage part and the other member which rotates eccentrically following the said liquid feeding storage part, The any one of Claims 1-8 characterized by the above-mentioned. Single-shaft eccentric screw pump. The uniaxial eccentricity according to any one of claims 1 to 9 , further comprising an eccentricity limiting means for limiting an eccentric rotation of the liquid supply storage unit by contacting an outer peripheral surface of the liquid supply storage unit. Screw pump. A driving machine for rotating the rotor is installed on the lower side with respect to the liquid feeding storage unit,
The rotor is installed in a state in which a connection portion connected to the drive machine side is directed downward,
An insertion part is provided at the bottom of the liquid-feeding storage part so that the connection part can be inserted.
The uniaxial eccentric screw according to any one of claims 1 to 10 , wherein the rotor and the liquid-feed storage part can be integrated by inserting and connecting the connection part to the insertion part. pump. The liquid-feeding reservoir is provided with a reduced portion formed so that the cross-sectional area of the internal space is reduced toward the bottom,
The single-shaft eccentric screw pump according to any one of claims 1 to 11 , wherein one end side of the stator is opened in the reduced portion. A liquid-feeding reservoir having an internal space for accommodating a fluid to be pumped;
An outer rotor having a through-hole with an inner peripheral surface formed in a female screw shape, and a uniaxial eccentric screw pump mechanism provided with a male screw-shaped inner rotor inserted into the through-hole,
By rotating the outer rotor in conjunction with the rotation of the inner rotor, it is possible to suck and flow the fluid into the through hole,
The outer rotor functions as an eccentric rotation allowing means for allowing an eccentric rotation to occur in the inner rotor and the liquid-feeding reservoir when the fluid is pumped;
At least one end side of the outer rotor is disposed in the internal space of the liquid feeding storage unit,
The uniaxial eccentric screw pump characterized in that the inner rotor is rotatable integrally with the liquid-feeding reservoir .

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