JP4651171B2 - Vertical shaft pump - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vertical shaft pump used to pump water from a low place to a high place.
[0002]
[Prior art]
Vertical shaft pumps are used in various drainage facilities. As shown in FIG. 7, as an example, a vertical pump is installed and used in the drainage station of the building so as to drain the water in the water absorption tank to the discharge water tank. A discharge bowl having a pump shaft 5 extending in the vertical direction and an impeller 6 attached to a lower end portion of the pump shaft 5 and having a bell mouth 7 at the lower end in a floor 3 below the pump building 4 provided on the upper side. 8 and a pump main body 11 comprising a pumping pipe 9 and an elbow pipe 10 sequentially arranged on the discharge bowl 8, the lower end of the elbow pipe 10 is placed on the lower floor through a ring-shaped mounting seat 12. 3 so that the pump body 11 is supported by the lower floor 3, and an upper floor 2 is provided above the lower floor 3, and a vertical shaft is provided on the upper floor 2. Installed a prime mover 13 and a reducer 15 for the pump. The upper end of the pump shaft 5 is taken out through the elbow pipe 10 and connected to a speed reducer 15 installed on the upper floor 2, and the pump shaft is driven by the prime mover 13 via the output shaft 14 and the speed reducer 15. 5 is connected to a main pipe 18 having a discharge valve 16 at an intermediate portion and a backflow prevention valve 17 at an outlet portion of the elbow pipe 10. The outlet portion faces the inside of the discharge water tank 19, and the pump shaft 5 is driven by the drive of the prime mover 13 to rotate the impeller 6, thereby discharging the water sucked into the discharge bowl 8 through the bell mouth 7 upward. The discharge pipe 19 is discharged through the pumping pipe 9, the elbow pipe 10, and the main pipe 18.
[0003]
However, in the case of such a conventional vertical shaft pump, the pump building 4 has a two-floor structure having an upper floor 2 for installing the prime mover 13 and a lower floor 3 for installing the pump body 11. There is a problem that the height of the building 4 is increased and the construction cost is increased, and the maintenance needs to be performed on the upper and lower floors 2 and 3, so that the entire maintenance work becomes complicated.
[0004]
Therefore, in order to install the prime mover and pump body on the same floor, instead of using a model that uses two upper and lower floors to install the prime mover and pump body, maintenance can be performed on one floor. Conventionally, as schematically shown in FIG. 8, the horizontal input shaft 20 connected to the output shaft of the prime mover and the rotational force received from the horizontal input shaft 20 side through the intermediate transmission mechanism portion 22 are conventionally used. A power transmission mechanism 23 in which a vertical output shaft 21 and the like adapted to transmit to the upper end of the pump shaft 5 is assembled to the casing 24 is integrally attached to the back outer wall portion of the elbow pipe 10 of the pump main body 11, and the pump A motor can be installed on the floor corresponding to the lower floor 3 in FIG. 7 installed through the main body 11 (Japanese Patent Laid-Open No. 11-193799), as schematically shown in FIG. 8, a power transmission mechanism in which a horizontal input shaft 20, a vertical output shaft 21 and the like similar to those shown in FIG. 8 are assembled to a casing 24 is configured as a separate power transmission unit 25, and the power transmission unit 25 is connected to the pump body. 11 (Japanese Patent Laid-Open No. 2000-27785) has been proposed in which the elbow pipe 10 is detachably installed on two upper and lower installation seats 26a, 26b provided on the back side outer wall portion.
[0005]
[Problems to be solved by the invention]
However, in the case of the vertical shaft pump shown in FIG. 8, since the power transmission mechanism 23 is integrated with the elbow pipe 10, the shape (casting shape) of the elbow pipe 10 becomes very complicated, and much effort is required for maintenance. Not only is it necessary, but there is a problem that a normal vertical shaft pump cannot be used.
[0006]
On the other hand, in the case of the vertical shaft shown in FIG. 9, since the power transmission mechanism has a unit structure, the maintenance is easier than in the case of the vertical pump shown in FIG. Since two installation seats 26a and 26b must be provided on the side outer wall portion, there is still a problem that a normal vertical shaft pump cannot be used.
[0007]
Therefore, the present invention is intended not only to facilitate maintenance, but also to easily apply a normal vertical shaft pump.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention has a pumping pipe and an elbow pipe sequentially arranged on a discharge bowl that houses an impeller at the lower end of the pump shaft, and the upper end portion of the pump shaft is outward from the elbow pipe. The pump body that is taken out so as to protrude upward is installed so that the lower end position of the elbow pipe is supported by the floor through a ring-shaped mounting seat, and the pump shaft is driven by a prime mover In the vertical shaft pump configured as described above, the horizontal input shaft connected to the prime mover installed on the same floor as the floor on which the pump body is installed, and the rotational force from the horizontal input shaft side is transmitted to the pump shaft via the vertical output shaft. the outer peripheral lower portion of the power transmission unit provided with a power transmission mechanism, a skirt equipped with a mounting flange at the lower end so as to put the mounting seat of the pump body supporting provided, the power transmission unit, the upper Assembled to the pump body removably attached to the mounting seat via a mounting flange of the skirt lower end, further to the power transmission unit, the shaft insertion hole formed in the upper plate and the lower plate of the upper casing with the power transmission unit The vertical output shaft inserted through the bottom plate is supported and an oil seal device is provided in the shaft insertion hole portion of the bottom plate, and a water seal device is provided in the pump shaft penetrating portion of the elbow pipe. And the water seal device are configured to face each other vertically .
[0009]
The power transmission unit can be attached to and detached from the mounting seat for supporting the pump body or the surrounding floor via the mounting flange at the lower end of the skirt, making maintenance easy and eliminating the need for elbow pipe processing. Therefore, a normal vertical shaft pump can be applied.
[0010]
Further, the vertical output shaft is supported by being inserted into shaft insertion holes provided in the upper surface plate and the lower surface plate of the upper casing of the power transmission unit, and an oil seal device is provided in the shaft insertion hole portion of the lower surface plate. , by equipped with a water seal device to the pump shaft penetrating portion of the elbow pipe, so are the structure which is adapted to confront the Aburafu device and water seal device up and down, lubricating oil leakage and the power transmission unit of the power transfer unit It is possible to prevent the pump water from entering the inside.
[0011]
Furthermore, by adopting a configuration in which a tray portion is formed on the upper surface portion of the water sealing device, drainage from the pump water generated on the water sealing device can be received by the tray portion, and lubricating oil can leak from the oil sealing device. Even if an unforeseen situation occurs, it can be received by the tray portion and these scattering can be prevented.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0013]
1 to 3 show an embodiment of the present invention. Like the vertical pump shown in FIG. 7, the pump main body 11 is connected to the lower end portion of the elbow pipe 10 via a ring-shaped mounting seat 12. In the structure installed so as to be penetrated and supported by the floor 3, the horizontal input shaft 20 connected to the motor 13 installed on the same floor as the floor 3 on which the pump body 11 is installed and the horizontal input shaft 20 side A skirt 31 having a mounting flange 32 attached to the lower end of the power transmission unit 33 having a power transmission mechanism 30 configured to transmit the rotational force to the pump shaft 5 so as to be mounted on the mounting seat 12 of the pump body 11. The power transmission unit 33 is detachably attached to the mounting seat 12 via the mounting flange 32 at the lower end of the skirt and is assembled to the pump body 11.
[0014]
More specifically, the power transmission unit 33 includes an upper casing 34 that surrounds the position of the upper end portion of the pump shaft 5 penetrating and projecting from the back outer wall portion of the elbow pipe 10 so as to project circularly in the horizontal direction. The side casing 35 is provided so as to extend downward on one side of the outer peripheral portion of the upper casing 34, and the reinforcing casing 36 is configured to reinforce the outer peripheral portion of the upper casing 34.
[0015]
A shaft box 37 is attached to the side casing 35 at a required height position of the outer plate 35a by penetrating in a horizontal direction. The shaft box 37 has a bevel gear 38 at the front end (inner end). A horizontal input shaft 20 whose end portion (outer end portion) can be connected to the output shaft 14 of the prime mover 13 by a joint 39 is inserted, and the bearing 40 holding the horizontal input shaft 20 in the shaft box 37 is rotatable. The intermediate shaft 42 provided on the lower end side with the bevel gear 41 supported by the bevel gear 38 is passed through the lower surface plate 34b of the upper casing 34 from the position in the side casing 35 and the position of the upper surface plate 34a. When the upper end of the intermediate shaft 42 is supported on a bearing 44 in a shaft box 43 fixed to the upper plate 34a of the upper casing 34. Both The lower end of the intermediate shaft 42, it is constituted such that it is supported by the radial bearing 46 in the axle box 45 which is fixed to the inner wall of the side casing 35.
[0016]
The upper casing 34 is provided with shaft insertion holes 47 and 48 in the upper surface plate 34a and the lower surface plate 34b. The shaft insertion holes 47 and 48 are fitted to the outer periphery of the upper end portion of the pump shaft 5 from above. The pipe-shaped vertical output shaft 21 that is key-coupled is arranged, and the vertical output shaft 21 is connected to the thrust bearing 49 and the radial bearing 50 at the portion of the shaft insertion hole 47 and at the portion of the shaft insertion hole 48. A gear 52 is attached to the outer periphery of a portion of the vertical output shaft 21 that is rotatably supported by the radial bearing 51 and located in the upper casing 34, and the gear 52 is attached to the upper end portion of the intermediate shaft 42. The horizontal input shaft 20 is rotated by driving the prime mover 13 and the rotational force is transmitted to the intermediate shaft 42 via the bevel gears 38 and 41. Further, the gear 53 and the gear 52 are rotated. The rotational speed after shifting are to tell the pump shaft 5 via a vertical output shaft 21. A power transmission mechanism 30 is configured between the bevel gear 38 and the vertical output shaft 21.
[0017]
Further, the skirt 31 provided at the lower outer periphery of the power transmission unit 33 has a cylindrical shape so as to surround the elbow pipe 10 as a whole, but the outlet of the elbow pipe 10 is formed at a part of the peripheral wall portion. A notch 54 is provided so as not to interfere with the portion, and when the flange on the vertical output shaft 21 is fitted on the upper end of the pump shaft 5, the lower end of the mounting seat 12 is mounted via the horseshoe-shaped mounting flange 32. The length is set on the upper surface, and the attachment flange 32 is detachably attached to the attachment seat 12 with bolts 55. The detailed length (attachment) adjustment is performed at the lower portion of the thrust bearing 49.
[0018]
Further, an oil seal device 56 is provided at a lower position of the shaft insertion portion 48 formed on the lower surface plate 34 b of the upper casing 34, while the pump shaft penetration portion 57 of the elbow pipe 10 is provided in addition to the bush 58. A water sealing device 59 is provided on the upper part of the bush 58 so that the oil sealing device 56 and the water sealing device 59 are opposed to each other in the vertical direction. A tray portion 59a for receiving lubricating oil or the like leaking from 56 is formed on the upper surface portion.
[0019]
Reference numeral 60 denotes a head cover that covers the upper end portion of the vertical output shaft 21 protruding upward from the upper surface plate 34 a of the upper casing 34, and 61 denotes an oil sump formed at the lower portion of the side casing 35.
[0020]
Since the above configuration is adopted, the elbow pipe 10 of the pump body 11 is attached to the prime mover 13 connected to the horizontal input shaft 20 by selecting the height position of the horizontal input shaft 20 according to the output shaft 14 of the prime mover 14. It can be installed on the floor 3 and the height of the vertical shaft pump can be lowered. Therefore, the pump building 4 as shown in FIG. 7 can be constructed as a single floor type with a low height.
[0021]
In the above, the power transmission unit 33 can be easily installed in a stable state by simply mounting the mounting flange 32 at the lower end of the skirt 31 on the mounting seat 12 of the pump body 11 and fastening the bolt 55. At the same time, it can be easily separated by removing the bolts 55, so that maintenance can be performed easily and at a specialized factory. Further, since the power transmission unit 33 is attached to and detached from the mounting seat 12 of the pump body 11 as described above, it is not necessary to perform any processing on the elbow pipe 10. The vertical shaft pump can be applied without hindrance.
[0022]
On the power transmission unit 33 side, an oil seal device 56 is provided in the shaft insertion hole 48 portion of the upper casing bottom plate 34b, and on the pump body 11 side, a water seal is provided in the pump shaft through portion 57 of the elbow pipe 10. Since the device 59 is provided, it is possible to prevent the occurrence of a situation in which pump water enters the power transmission unit 33 and causes the operation to stop, and the pump is provided on the water seal device 59. Even if drainage due to water occurs or the lubricating oil leaks from the oil sealing device 56, the tray 59a provided on the upper surface of the water sealing device 59 can receive the drain or lubricating oil. Therefore, the surroundings are not contaminated with drain or oil.
[0023]
Next, FIG. 4 shows another embodiment of the present invention. In the same configuration as the vertical shaft pump shown in FIGS. 1 to 3, a pipe-shaped vertical is used to transmit the rotational force to the pump shaft 5. Instead of fitting the output shaft 21 to the upper end of the pump shaft 5, a solid vertical output shaft 21 ′ is connected to the upper end of the pump shaft 5 using a flange joint 62. . That is, the solid vertical output shaft 21 ′ is rotatably supported by the upper casing 34 by the thrust bearing 49 and the radial shaft 51 so as to receive the rotational force from the gear 52, and from the lower surface plate 34 b of the upper casing 34. The flange 62 a is keyed to the lower end of the vertical output shaft 21 ′ that protrudes downward, while the flange 62 b is keyed to the upper end of the pump shaft 5, and the flanges 62 a and 62 b as the flange joint 62 are attached. The bolt 63 can be detachably connected. Other configurations are the same as those of the embodiment shown in FIGS. 1 to 3, and the same parts are denoted by the same reference numerals.
[0024]
Even when configured as shown in FIG. 4, the same effects as those of the embodiment shown in FIGS. 1 to 3 can be obtained.
[0025]
Next, FIG. 5 shows still another embodiment of the present invention. In the same configuration as that of the vertical pump shown in FIGS. 1 to 3, a top casing 64 is disposed further above the upper casing 34 of the power transmission unit 29. The top casing 64 accommodates the thrust bearing 49 that supports the vertical output shaft 21 and the radial bearing 44 that supports the upper end portion of the intermediate shaft 42, and the upper portion of the intermediate shaft 42. An oil lubrication pump 66 is installed on the top casing 64 positioned so that the input shaft 65 projects downward into the top casing 64, while an extension shaft 67 is provided at the upper end of the intermediate shaft 42. Transmission gears 27 and 28 are attached to the input shaft 65 of the oil pump 67 and the input shaft 65 of the oil pump 66 so that the oil pump 66 is driven by the rotational force of the intermediate shaft 42. In addition, the other end of the pipe 29 having one end communicating with the oil reservoir 61 of the side casing 35 is connected to the oil supply pump 66, and the lubricating oil in the oil reservoir 61 is sucked up by driving the oil supply pump 66. Thus, the gears and the bearings are supplied from above.
[0026]
If it comprises as shown in FIG. 5, a part of driving force of the motor | power_engine 13 can be taken out and the oil supply pump 66 can be driven, and lubricating oil can be circulated and used efficiently.
[0027]
The present invention is not limited to the above embodiment. For example, as shown in FIG. 6, the horizontal input shaft 20 may be disposed obliquely with respect to the side casing 35, and FIG. 5 and the thrust bearing 49 shown in FIG. 5 may be assembled at the position of the radial bearing 51. Furthermore, the lubricating oil circulation supply system shown in FIG. 5 can be applied to the embodiment shown in FIG. Further, in each of the above embodiments, the case where the mounting flange 32 of the power transmission unit 33 is mounted on the mounting seat 12 of the pump body 11 has been shown. However, the mounting flange 32 is directly mounted on the floor 3 around the mounting seat 12. Of course, various modifications can be made without departing from the scope of the present invention.
[0028]
【The invention's effect】
As described above, according to the vertical shaft pump of the present invention, the pumping pipe and the elbow pipe are sequentially arranged on the discharge bowl that houses the impeller at the lower end of the pump shaft, and the upper end portion of the pump shaft is arranged outside the elbow pipe. The pump body that is taken out so as to protrude upward and project upward is installed so that the lower end position of the elbow pipe is supported by the floor through a ring-shaped mounting seat, and the pump shaft is driven by the motor In a vertical shaft pump driven by a horizontal input shaft connected to a prime mover installed on the same floor as the floor on which the pump main body is installed, and the pump shaft via the vertical output shaft for rotational force from the horizontal input shaft side. the outer peripheral lower portion of the power transmission unit provided with a power transmission mechanism for transmitting the provided a skirt fitted with a mounting flange at the lower end so as to put the mounting seat of the pump body supporting, the power transmission unit And assembled to the pump body removably attached to the mounting seat via a mounting flange of the skirt lower end, further, to the power transmission unit, provided on the upper plate and the lower plate of the upper casing with the power transmission unit The vertical output shaft inserted through the shaft insertion hole is supported, and an oil sealing device is provided at the shaft insertion hole portion of the lower surface plate, and a water sealing device is provided at the pump shaft penetrating portion of the elbow pipe. The oil sealing device and the water sealing device are configured to face each other upside down , or the mounting flange is mounted on the floor around the mounting seat so as to be detachably mounted. In addition to being able to easily attach and detach the power transmission unit from time to time, it is not necessary to process the elbow pipe. Of it is particularly Yusei when modifying the horizontal axis pump vertical shaft pump, also so as to support the vertical output shaft is inserted into the shaft insertion hole formed in the upper plate and the lower plate of the upper casing having the above power transmission unit to, and causes equipped with a Aburafu device to the shaft insertion hole portion of the lower plate, thereby equipped with a water seal device to the pump shaft penetrating portion of the elbow pipe, so as to confront the Aburafu device and water seal device in the vertical since, Ru can be can be prevented from entering the pump water to the power transmission unit of the lubricating oil leakage and the power transmission unit to improve the reliability. Further, by forming a tray portion on the upper surface portion of the water sealing device, even if drain is generated on the water sealing device or lubricating oil leaks from the oil sealing device, the tray portion It can be received and exhibits excellent effects such as prevention of surrounding contamination.
[Brief description of the drawings]
FIG. 1 is a schematic view showing an embodiment of a vertical shaft pump according to the present invention.
FIG. 2 is a view taken in the direction of arrows AA in FIG.
FIG. 3 is a view taken in the direction of arrows BB in FIG. 1;
FIG. 4 is a schematic diagram showing another embodiment of the present invention.
FIG. 5 is a schematic view showing still another embodiment of the present invention.
FIG. 6 is a plan view showing still another embodiment of the present invention.
FIG. 7 is a schematic view showing an example of a conventional vertical shaft pump.
FIG. 8 is a partial view showing an example of a conventional vertical pump made to improve the conventional vertical pump of FIG. 7;
FIG. 9 is a partial view showing another example of a conventional vertical pump made to improve the conventional vertical pump of FIG. 7;
[Explanation of symbols]
3 Floor 5 Pump shaft 6 Impeller 8 Discharge bowl 10 Elbow pipe 11 Pump body 12 Mounting seat 13 Motor 20 Horizontal input shafts 21, 21 'Vertical output shaft 30 Power transmission mechanism 31 Skirt 32 Mounting flange 33 Power transmission unit 34 Upper casing 34a Upper surface plate 34b Lower surface plate 35 Side casing 47, 48 Shaft insertion hole 56 Oil seal device 57 Pump shaft through portion 59 Water seal device 59a Tray portion

Claims (3)

A pumping pipe and an elbow pipe are successively arranged on a discharge bowl that houses the impeller at the lower end of the pump shaft, and the upper end portion of the pump shaft penetrates outward from the elbow pipe and is taken out so as to protrude upward. In the vertical shaft pump, wherein the pump body is installed so that the lower end position of the elbow pipe is supported by the floor through a ring-shaped mounting seat, and the pump shaft is driven by a prime mover, the pump body The lower outer periphery of a power transmission unit comprising a horizontal input shaft connected to a motor installed on the same floor as the floor on which the motor is installed and a power transmission mechanism for transmitting rotational force from the horizontal input shaft side to the pump shaft via the vertical output shaft a, a skirt fitted with a mounting flange at the lower end so as to put the mounting seat of the pump body supporting provided, the power transmission unit, through the mounting flange of the skirt lower end Assembled to the pump body removably attached to the serial mounting seat, further, the power transmission unit, the vertical output shaft is inserted into the shaft insertion hole formed in the upper plate and the lower plate of the upper casing with the power transmission unit And an oil seal device is installed in the shaft insertion hole portion of the bottom plate, and a water seal device is installed in the pump shaft penetrating portion of the elbow pipe so that the oil seal device and the water seal device are vertical shaft pump according to claim Rukoto to have a configuration which is adapted to confront.   2. The vertical shaft pump according to claim 1, wherein the mounting flange is mounted on the floor around the mounting seat so that the mounting flange is detachably mounted instead of mounting the mounting flange on the mounting seat. The vertical shaft pump according to claim 1 or 2 , wherein a tray portion is formed on an upper surface portion of the water sealing device.

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