JP2928980B2 - Split sleeve device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid device, such as a pump, which surrounds the outer periphery of a rotary shaft as opposed to a bearing portion constituted by a slide bearing or a shaft sealing portion constituted by a group of gland packings. The present invention relates to a split-type sleeve device which can be simultaneously rotated and detachably mounted on the sleeve.

[0002]

2. Description of the Related Art Heretofore, as a split type sleeve device which is mounted so as to surround a rotating shaft and be rotatable simultaneously with respect to a bearing portion constituted by a slide bearing or a shaft sealing portion constituted by a gland packing group. , FIGS. 8 and 9 and FIGS. 10 and 11 are known. That is, the former split-type sleeve device 1 shown in FIGS.
Has a structure in which two sleeves 3 and 3 having an arc-shaped cross section are attached to the rotating shaft 2 so as to be rotatable simultaneously by welding 4 and 4, and the latter split type sleeve shown in FIGS. The apparatus includes two sets of sleeves 3 and 3 having an arc shape in cross section with respect to the rotating shaft 2 and a plurality of set screws 5 and 5.
It is structured to be rotatable at the same time.

[0003] In the former split type sleeve device 1, by processing the two sleeves 3 and 3 by setting the inner and outer circumferences to have the same radius of curvature, the two cross sections 3 and 3 are formed to have the same cross-sectional arc shape. Even when the sleeves 3 and 3 are attached to the rotating shaft 2 by welding 4 and 4, even if the sleeves 3 and 3 have a slight step h on the mating surfaces 3A and 3A, as shown in FIG. Occurs. Therefore, after the sleeves 2 and 2 are attached, the step h is eliminated,
In addition, a troublesome grinding process for forming the outer circumference of the sleeves 3 and 3 again into an appropriate arc surface is required, and the rotating shaft 2 is heated at the time of attachment by the welding 4 and 4, and the rotating shaft is heated by the thermal influence at this time. 2 has a drawback of causing distortion and lowering the fitting accuracy with respect to a mating side such as a bearing portion or a shaft sealing portion. In addition, even if the removal of the sleeves 3 and 3 is required for maintenance or the like, a complicated operation for removing the welded portions 4 and 4 is required.
3 is difficult to remove, and even if the removed sleeves 3 and 3 are attached to the rotating shaft 2 again by welding 4 and 4,
Since the radius of curvature of the outer periphery is reduced by the above-described grinding, there is a difficulty that the outer periphery cannot be reused.

On the other hand, in the latter split type sleeve device 1,
By processing the two sleeves 3 and 3 by setting the inner and outer circumferences to have the same radius of curvature, the sleeves 3 and 3 are rotated even if the cross-sections of the two sleeves 3 and 3 have the same arc shape. When the shaft 2 is attached to the shaft 2 with a plurality of set screws 5, a slight displacement occurs in the radial position of the mating surfaces 3 </ b> A, 3 </ b> A, and a step h such as the former split type sleeve device 1 (FIG. Ref). Therefore, after the sleeves 2 and 2 are attached, a troublesome grinding process for eliminating the step h and forming the outer circumferences of the sleeves 3 and 3 again into an appropriate arc surface is required. However, as compared with the former split-type sleeve device 1, the sleeves 3 and 3 are relatively easy to remove, and thus have an advantage that they can be reused. However, a female screw hole 6 for screwing in the set screws 5, 5 and a concave portion 7 into which the tip ends of the screwed set screws 5, 5 are press-fitted.
Must be formed by co-machining the sleeves 3 and 3 and the rotating shaft 2 in order to increase the mounting accuracy. As a result, when the sleeves 3 and 3 are replaced due to wear over time, the concave portions 7 must be formed again with respect to the rotary shaft 2, and the number of the concave portions 7 increases accordingly, and the rotary shaft 2
In this case, the number of times of replacing the sleeve is limited, and the set screws 5, 5 may fall off, so that the sleeves 3, 3 may fall off.

[0005]

The problems to be solved are that it is difficult to remove the sleeve alone, that a troublesome grinding process is required after the sleeve is attached, that the sleeve cannot be reused, Although the sleeve itself is relatively easy to remove and can be reused, there are various points such as a limitation on the number of replacements and a risk that the sleeve alone may fall off.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a split type sleeve device which is attached to a rotating shaft opposite to a bearing portion or a shaft sealing portion so as to be rotated simultaneously and detachably, and has a radius of curvature of inner and outer circumferences. Are detachably interposed across the mating surfaces of a plurality of sleeves having the same circular cross section and the circumferentially adjacent sleeves, and the mating surfaces are brought into contact with each other so that the plurality of sleeves are annularly joined. A plurality of sleeves annularly coupled to each other, a first pressing ring removably disposed at one axial end of the plurality of annularly coupled sleeves so as to surround the rotating shaft, and a plurality of annularly coupled sleeves. A second pressing ring which surrounds the rotating shaft and is detachably disposed at the other end in the axial direction of the single body, and gradually reduces the diameter toward the axial end face on the outer periphery of both ends of the plurality of sleeves in the axial direction. First tapered surface formed A second tapered surface that abuts the first tapered surface is formed on a side of each of the first pressing wheel and the second pressing wheel that opposes each other, and at least one of the first pressing wheel and the second pressing wheel is opposed to the other side. It is configured to move and press the first tapered surface by the second tapered surface to fix the plurality of sleeves alone to the rotating shaft, thereby facilitating attachment and detachment of the sleeves alone, and grinding after attaching the sleeves alone. By eliminating the need for processing, the reuse and replacement of the sleeve itself have been made possible, and the object of preventing the sleeve from falling off has been achieved.

[0007]

According to the present invention, a plurality of sleeves are interposed in a circumferential direction across a mating surface of circumferentially adjacent ones of the plurality of sleeves, and the plurality of sleeves are separated by the circumferential connecting means. Are annularly coupled to surround the rotating shaft, a first push ring is disposed at one axial end of the plurality of sleeves that are annularly coupled, and a second push ring is disposed at the other axial end of the plurality of sleeves alone. After placing, the first pressing wheel and the second pressing wheel
Move at least one of the pressing wheels to the other side,
By pressing the first tapered surface with the second tapered surface, the plurality of sleeves can be prevented from moving in the axial direction, and the plurality of sleeves can be mounted in such a state that they rotate simultaneously with the rotating shaft. In addition, by removing at least one of the first pressing wheel and the second pressing wheel, the plurality of sleeves can be disassembled and removed. That is, a plurality of sleeves can be easily attached and detached. In addition, proper contact between the mating surfaces of the sleeves that are circumferentially adjacent to each other is ensured by the circumferential connecting means. For this reason, the grinding process after attaching the sleeve alone can be omitted. These things do not change even if the sleeve alone is repeatedly attached and detached, so that the sleeve alone can be reused,
The sleeve alone can be replaced. Moreover, since the first tapered surface is in contact with the second tapered surface, it is possible to prevent the plurality of sleeves from dropping off and to prevent both ends in the axial direction from expanding in the radial direction.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. The same or corresponding parts as those of the conventional example are denoted by the same reference numerals and described. 1 to 4, the split sleeve device 1 includes two sleeve units 3 and 3,
A circumferential connecting means 8 for connecting the sleeves 3 and 3 in a ring shape, and a circle removably arranged around the rotating shaft 2 at one axial end of the sleeves 3 and 3 connected in a ring shape. A first circumferentially split type pressing wheel 9 and a second circumferentially splitting type second pressing wheel which are removably arranged around the rotating shaft 2 at the other axial end of the plurality of sleeves 3 and 3 connected in a ring shape. 10 is provided.

Each of the sleeves 3 and 3 is composed of an inner peripheral surface formed with a radius of curvature that can uniformly contact the outer peripheral surface of the rotary shaft 2 at the position where the split type sleeve device 1 is mounted, and a slide bearing. It has a semicircular cross section having an outer peripheral surface formed by a radius of curvature that can slide on the bearing surface of the bearing portion 11, and the mating surfaces 3A, 3A,
3A has an axis perpendicular to the mating surfaces 3A, 3A,
In addition, a plurality of blind through holes 3B are formed at predetermined intervals in the axial direction and are concentrically communicated with each other in a mating state where the mating surfaces 3A are brought into contact with each other. Further, first tapered surfaces 3C, 3C whose diameter gradually decreases toward the axial end surface are formed on the outer periphery of both ends in the axial direction.

The circumferential connecting means 8 is composed of a plurality of knock pins, and is fitted to blind through holes 3B formed in the mating surfaces 3A, 3A of the sleeves 3, 3, thereby forming the mating surfaces 3A, 3A. The sleeves 3 and 3 are connected to each other in a series of annular shapes with the mating surfaces 3A and 3A being in contact with each other with being detachably interposed therebetween.

The first pressing ring 9 is divided into two parts in the circumferential direction, and is composed of single pressing rings 9A, 9A which are integrally disassembled with fastening bolts 12 so as to be disassembled. It is formed in a semicircular shape having an inner peripheral surface formed with a radius of curvature that can contact the outer peripheral surface of the rotation shaft 2 at the mounting position of the first pressing wheel 9. A second tapered surface 9B having a degree of inclination that abuts the first tapered surface 3C is formed on the side facing the circumferentially split type second pressing wheel 10, and the second tapered surface 9B is formed with a second tapered surface 9B. With the opposite end face abutting against a step 2A formed on the rotating shaft 2, it is mounted so as to be able to rotate simultaneously with respect to the rotating shaft 2.
Therefore, the first pressing wheel 9 also has a function as a stopper for preventing the sleeves 3 and 3 from moving to one side (left side in FIG. 1) in the axial direction.

The circumferentially split type second pressing wheel 10 is constituted by pressing wheels 10A, 10A which are divided into two in the circumferential direction and are integrally connected so as to be disassembled by fastening bolts 13.
These push rings 10A, 10A are formed with male screw portions 2 formed on the outer peripheral surface of the rotation shaft 2 at the mounting position of the second push ring 10.
B is formed in a semicircular shape with a female screw 10B that can be screwed into B. Also, on the side facing the first pressing wheel 9, the first
Second tapered surface 1 having a degree of inclination that abuts tapered surface 3C
0C is formed. In the drawing, reference numeral 14 denotes a key, which is a sleeve alone 3 and a circumferentially split type first pressing wheel 9 with respect to the rotating shaft 2.
Are connected so as to be able to rotate simultaneously. The key 14 is not always necessary.

The procedure for mounting the above-described configuration will be described. First,
Pressing Wheel Units 9A, 9A in Circumferentially Divided First Pressing Wheel 9
With the end surface on the opposite side of the second tapered surface 9B being in contact with the stepped portion 2A formed on the rotating shaft 2, the pressing wheels 9A, 9A
By holding the rotary shaft 2 by the above, the pressing wheels 9A, 9A are fastened by the fastening bolts 12 and integrally connected to each other, thereby forming the first pressing wheel 9 in the circumferential direction division type so that the rotating shaft 2 can be simultaneously rotated. Attach.

Next, one half of the circumferential coupling means 8 formed by a knock pin is fitted into each of the plurality of blind holes 3B in one sleeve unit 3, and the other half is out of the blind hole 3B. In this state, one of the sleeves 3 is applied to a half area of the outer peripheral surface of the rotary shaft 2 where the split type sleeve device 1 is mounted.

Next, the knock pins 8 projecting from the plurality of blind through holes 3B of the one sleeve unit 3 are fitted into the plurality of blind through holes 3B of the other sleeve unit 3, respectively. , 3 mating surface 3
A and 3A are brought into contact with each other, so that the other sleeve unit 3 can be divided into the split type sleeve device 1 on the rotating shaft 2.
The sleeves 3 and 3 are joined in a ring shape by contacting the other half of the outer peripheral surface of the mounting position.

Thereafter, the sleeves 3 and 3 connected in an annular shape are moved in the direction of the first split ring 9 in the circumferential direction so that the sleeves 3 and 3 are fixed to the second tapered surface 9 B of the single split ring 9. The first formed on the outer periphery of one end in the axial direction of
The tapered surface 3C is abutted.

Further, the rotary shaft 2 is held by the push wheels 10A, 10A in the circumferentially split type second push wheel 10, and the female screw 10B is screwed into the male screw portion 2A of the rotary shaft 2 and fastened. Pressing wheel 10A, 10A by bolt 13
And by joining them together, the circumferential split type second
The pressing wheel 10 is configured and attached to the rotating shaft 2 so as to be able to rotate simultaneously.

Next, the circumferentially-split second pressing wheel 10 is rotated in the positive direction around the axis of the rotary shaft 2 to advance in the direction of the circumferentially-split first pressing wheel 9. Thereby, the second pressing wheel 1
The first tapered surface 3C in which the second tapered surface 10C is formed on the outer periphery of the other end of the sleeve unit 3 in the axial direction.
Agree with. By continuing the forward rotation of the second pressing wheel 10 from this state, the sleeves 3 and 3 are pushed toward the first pressing wheel 9 in the circumferential direction and are formed on the outer periphery of one end in the axial direction. The first tapered surface 3C strongly abuts the second tapered surface 9B of the first pressing ring 9 and the second tapered surface 10C of the second pressing ring 10 is formed on the first tapered surface 3C formed on the outer periphery of the other end in the axial direction. Is strongly in contact with the sleeve itself
Can be attached to the rotating shaft 2 so as to be simultaneously rotatable.

On the other hand, in the above-mentioned mounting state, for example, the fastening of the fastening bolt 13 is released, and the pressing wheels 10A, 1
By disassembling and removing 0A, the sleeve alone 3,
3 can be disassembled and removed. That is, the sleeves 3 and 3 can be easily attached and detached.

Further, the connecting means 8 in the circumferential direction formed by the knock pin is connected to the mating surfaces 3 of the sleeves 3 and 3 respectively.
Since the mating surfaces 3A, 3A are brought into contact with each other to join the sleeves 3, 3 in a series of annular shapes by fitting into the blind through holes 3B formed in the sleeves 3, 3A. By setting the radius of curvature of the inner and outer peripheries equal to each other and processing, proper contact between the mating surfaces 3A, 3A of the sleeves 3, 3 is guaranteed. That is, unlike the conventional example, a slight step does not occur in the mating surfaces 3A, 3A of the sleeves 3, 3. Therefore, after the sleeves 3 and 3 are attached, the step is eliminated, and the sleeves 3 and 3 are removed.
The troublesome grinding process for forming the outer periphery of the surface into an appropriate arc surface again can be omitted. Therefore, the sleeves 3 and 3 can be reused and replaced. Moreover, the sleeve alone 3,3
The first tapered surface 3C at both ends in the axial direction of the
Since the tapered surface 9B and the second tapered surface 10C of the second pressing wheel 10 are in contact with each other, it is possible to reliably prevent the sleeves 3 and 3 from dropping off and the radial expansion of both ends in the axial direction.

In the present invention, as shown in FIG. 5, a female screw 9C is also formed on the first pressing wheel 9 in the circumferential direction, and the female screw 9C is formed.
May be screwed into the male screw portion 2C of the rotating shaft 2. With this configuration, it is possible to detachably attach to the rotating shaft 2 having no step 2A formed on the rotating shaft 2 of the embodiment.

As shown in FIG. 6, the female screw 10B of the circumferentially split type second pressing wheel 10 is omitted, and the pressing means 15 formed by a spring is fixed to the second pressing wheel 10 and the rotating shaft 2 in the circumferential direction. The second pressing wheel 10 may be interposed between the split retainers 16 to urge the second pressing wheel 10 in the direction of the circumferential split first pressing wheel 9. With this configuration,
A key 14 for connecting the sleeve 3 to the rotary shaft 2 so as to be able to rotate simultaneously is always necessary.

Further, as shown in FIG. 7, the pressing means 15 is constituted by a pressing bolt which is screwed and penetrated into the female screw hole 16A formed in the circumferentially divided retainer 16, and the pressing means 15 is pressed by the pressing force of the pressing bolt. The second pressing wheel 10 may be configured to urge in the direction of the first pressing wheel 9.

In each of the above embodiments, the description has been made using the sleeves 3 and 3 divided into two parts, the first pressing ring 9 in the circumferential direction and the second pressing ring 10 in the circumferential direction.
These sleeves 3 and 3, the circumferentially split first pressing ring 9
The division of the circumferential pressing type second pressing wheel 10 is not limited to two divisions, but may be three or more divisions. Further, the first pressing ring 9 and the second pressing ring 10 may be endless (annular) instead of the split type. Further, the use example in which the outer peripheral surfaces of the sleeves 3 and 3 are in sliding contact with the bearing surface of the bearing portion 11 has been described. However, the sleeve is used by sliding in contact with the shaft sealing surface of the shaft sealing portion formed by the gland packing group. Of course it is also possible.

[0025]

As described above, according to the present invention, the attachment and detachment of the sleeve unit can be easily performed, and the connecting means in the circumferential direction is interposed across the respective mating surfaces of the sleeve unit. Since the mating surfaces are brought into contact with each other and the sleeve alone is joined in a series of rings, by setting the radius of curvature of the inner and outer peripheries of the sleeve alone to be equal and working, the proper fit of the mating surfaces of the sleeve alone Contact is guaranteed. Thus, unlike the conventional example, a slight step does not occur on the mating surface of the sleeve alone. Therefore, it is possible to omit the troublesome grinding process for eliminating the step and attaching the outer periphery of the sleeve alone to an appropriate arc surface again after the attachment of the sleeve alone. For this reason, it is possible to reuse and replace the sleeve alone. Moreover, since the first tapered surface is in contact with the second tapered surface, it is possible to reliably prevent the plurality of sleeves from falling off and the axial ends from expanding in the radial direction.

[Brief description of the drawings]

FIG. 1 is a side view showing an attached state of one embodiment of the present invention in a partial cross section.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 1;

FIG. 4 is a sectional view taken along line CC of FIG. 1;

FIG. 5 is a side view showing, in partial cross section, an attached state of a modified example.

FIG. 6 is a side view showing, in partial cross section, an attached state of a different modified example.

FIG. 7 is a side view showing, in partial cross-section, an attached state of a further different modification.

FIG. 8 is a side view showing a mounting state of a conventional example with a partial cross section.

FIG. 9 is a sectional view taken along line DD of FIG. 8;

FIG. 10 is a side view showing, in partial cross section, an attached state of another conventional example.

FIG. 11 is a sectional view taken along line EE of FIG. 10;

FIG. 12 is an enlarged front view showing a state where a step is generated.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Split-type sleeve device 2 Rotating shaft 3 Sleeve alone 3A Mating surface 3C 1st taper surface 8 Circumferential coupling means 9 1st pressing ring 9B 2nd tapering surface 10 2nd pressing ring 10C 2nd taper surface

Claims (1)

(57) [Claims] 1. A split type sleeve device which is attached to a bearing portion or a shaft sealing portion so as to be capable of simultaneously rotating and detachably surrounding a rotating shaft, wherein the inner and outer circumferences have the same radius of curvature. A plurality of sleeves, and a circumferential connecting means for detachably interposing the mating surface of the circumferentially adjacent sleeves so as to be detachably interposed and bringing the mating surfaces into contact with each other to annularly join the plurality of sleeves; A first pressing wheel removably disposed around the rotating shaft at one axial end of a plurality of annularly coupled sleeves; and an axially other end of the plurality of annularly coupled sleeves. A second pressing ring that surrounds the rotating shaft and is detachably disposed, and a first tapered surface that gradually reduces in diameter toward an axial end surface is formed on the outer periphery of both axial ends of each of the plurality of sleeves; The first pressing wheel and the second pressing A second tapered surface which abuts on the first tapered surface is formed on each of the opposite sides of the wheel, and at least one of the first pressing wheel and the second pressing wheel is moved to the other side to form a first tapered surface by the second tapered surface. A split-type sleeve device, wherein a plurality of sleeves are fixed to a rotating shaft by pressing a tapered surface.