JP2928979B2 - 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 has a rotary shaft surrounding a rotary shaft and a bearing portion formed by a sliding bearing or a gland packing group. The present invention relates to a split type sleeve device which is rotatably and detachably mounted.

[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. 5 and 6 and FIGS. 7 and 8 are known. That is, the former split-type sleeve device 1 shown in FIGS.
It has a structure in which two sleeves 3 and 3 having a circular arc 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 device shown in FIGS. Has a structure in which two sleeves 3, 3 having a circular cross section with respect to the rotating shaft 2 are attached so as to be simultaneously rotatable by a plurality of set screws 5.

[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 these 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, a troublesome grinding process for eliminating the step h and forming the outer circumferences of the sleeves 3 and 3 into an appropriate arc surface again is required.
4, the rotary shaft 2 is heated during the mounting, and the rotary shaft 2 is distorted due to the thermal effect at this time, and there is a disadvantage that the fitting accuracy with respect to a mating side such as a bearing portion or a shaft sealing portion is reduced. In addition, even if the removal of the sleeves 3 and 3 is required for maintenance or the like, the complicated work of removing the welded portions 4 and 4 is required, so that it is difficult to remove the sleeves 3 and 3 and the sleeves 3 and 3 are removed. Sleeve only 3,3
Even if is attached to the rotating shaft 2 again by welding 4 and 4, the radius of curvature of the outer circumference is reduced by the above-mentioned grinding process, so that there is a disadvantage that it 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, 5, the mating surfaces 3A, 3A
, A slight displacement occurs in the radial position, and a step h (see FIG. 9) occurs as in the former split type sleeve device 1. 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, in comparison with the former split type sleeve device 1,
Since the sleeves 3 and 3 can be easily removed,
It has the advantage that it 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 distal ends of the screwed set screws 5, 5 are press-fitted are provided with the sleeves 3, 3 and the rotating shaft 2 in order to increase the mounting accuracy. Need to be formed by co-processing.
As a result, when the sleeves 3 and 3 are replaced due to wear over time, the recesses 7 must be formed again with respect to the rotating shaft 2, and the number of the recesses 7 increases accordingly, and the strength of the rotating shaft 2 increases. Therefore, there is a disadvantage that the number of times of replacement of the sleeve is limited, and there is a possibility that the sleeves 3 and 3 may fall off due to the set screws 5 and 5 falling out.

[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, and that the sleeve cannot be reused. In addition, even if the sleeve can be easily removed and reused, the number of replacements is limited, and there is a risk that the sleeve may fall off.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a split sleeve device which surrounds the outer periphery of a rotating shaft relative to a bearing portion or a shaft seal portion and is simultaneously rotatable and detachably mounted. A plurality of sleeves each having the same radius of curvature and a plurality of sleeves each having an arc-shaped cross section and a sleeve that is circumferentially adjacent to each other are detachably interposed across a mating surface of the sleeves, and the mating surfaces are brought into contact with each other to annularly form the plurality of sleeves. A first and a second retainer which are removably arranged around the rotating shaft at both axial ends of a plurality of annularly coupled sleeves; and Fixing means for detachably fixing to the rotating shaft, axially opposite end faces of each of the plurality of sleeves, and the first and second sleeves;
The plurality of sleeves and the first and second retainers can be detachably attached to each other by detachably interposing the opposite axial end faces of the retainer across the opposing axial end faces so as to abut the axial end faces and the axial end faces. It is characterized by having an axial coupling means integrally coupled in the direction, facilitating the attachment and detachment of the sleeve unit, and eliminating the need for grinding after the attachment of the sleeve unit, thereby enabling reuse and reuse of the sleeve unit. The purpose of enabling replacement and preventing the sleeve from falling off is achieved.

[0007]

According to the present invention, a plurality of circumferentially connecting sleeves are detachably interposed across the mating surfaces of circumferentially adjacent ones of the plurality of sleeves, and the plurality of sleeves are detachably provided by the circumferentially connecting means. Sleeves are annularly joined to surround the rotating shaft, and a first retainer and a second retainer are arranged at both axial ends of the plurality of annularly joined sleeves and are detachably fixed to the rotating shaft by fixing means. Immediately before, the axial coupling means is detachably interposed across the axial end faces of each of the plurality of sleeves and the opposing axial end faces of the retainers, and the plurality of sleeves are provided by the axial coupling means. By fixing the first retainer and the second retainer to the rotating shaft by the fixing means in a state where the single unit and both retainers are integrally connected in the axial direction, the axial movement of the plurality of sleeve units can be prevented. Sealed, and a plurality of sleeves alone can secure a mounting state to rotate simultaneously with the rotation axis. Also,
By removing at least one of the retainers, 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 facts do not change even if the sleeve alone is repeatedly attached and detached, so that the sleeve alone can be reused and the sleeve alone can be replaced. In addition, the axial coupling means can prevent the plurality of sleeves from falling off and the axial ends 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 disposed around the rotating shaft 2 at both axial ends of the sleeves 3 and 3 connected in a ring shape. A first circumferential retainer 9, a second circumferential retainer 10, fixing means 15 for detachably fixing the retainers 9, 10 to the rotating shaft 2, and axial directions of the sleeves 3, 3. Both end faces 3C, 3C are detachably interposed across the opposed axial end faces 9B, 10B of the first retainer 9 and the second retainer 10, and the axial end faces 3C, 3C are connected to the axial end faces 9B, 10B. An axial connecting means 16 is provided for connecting the sleeves 3 and 3 and the retainers 9 and 10 in series in the axial direction.

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 concentrically communicating with each other in a mating state where the mating surfaces 3A are brought into contact with each other are formed at predetermined intervals in the axial direction, and both end surfaces 3 in the axial direction are formed.
A plurality of blind through-holes 17 having an axis perpendicular to the axial end surfaces 3C, 3C are formed in C, 3C at predetermined intervals in the circumferential 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 mating surfaces 3A, 3A are detachably interposed across and the abutment surfaces 3A, 3A are brought into contact with each other to join the sleeves 3, 3 in a series of annular shapes.

The first retainer 9 is constituted by retainers 9A, 9A which are divided into two parts in the circumferential direction and are integrally connected so as to be disassembled by fastening bolts 12. These retainers 9A, 9A 1st retainer 9
Is formed in a semicircular shape with an inner peripheral surface formed by a radius of curvature that can abut on the outer peripheral surface at the mounting position.

The second retainer 10 is composed of retainers 10A, 10A which are divided in a circumferential direction into two parts and integrally disassembled by fastening bolts 13, and these retainers 10A, 10A Second
The retainer 10 is formed in a semicircular shape with an inner peripheral surface formed by a radius of curvature that can abut on the outer peripheral surface at the mounting position of the retainer 10.

A first retainer 9 and a second retainer 10
The axial end faces 9B, 10B opposing each other have an axis perpendicular to the axial end faces 9B, 10B, and the axial end faces 9B, 10B are attached to the axial end faces 3C, 3C of the sleeve units 3, 3, respectively. The blind hole 17 is brought into contact with the blind hole 17.
A plurality of blind through holes 18 concentrically communicating with each other are formed at predetermined intervals in the circumferential direction, and a plurality of female screw holes 19 are formed at predetermined intervals in the circumferential direction. It is formed through.

The fixing means 15 is composed of a plurality of set screws and is screwed into female screw holes 19 formed in the first retainer 9 and the second retainer 10, respectively, and presses the rotating shaft 2 at the tip. Specifically, the bottom of the concave portion 2B formed in the rotary shaft 2 corresponding to the female screw hole 19 is strongly pressed. Thereby, the first retainer 9 and the second retainer 10
Are fixed so as to be able to rotate simultaneously with respect to the rotation shaft 2.

The axial coupling means 16 comprises a plurality of knock pins. The blind through-holes 17 formed in the axial end faces 3C, 3C of the sleeves 3, 3, and the axes of the first retainer 9 and the second retainer 10, respectively. By fitting into the blind through holes 18 formed in the axial end faces 9B, 10B, the axial end faces 3C,
3C and the axial end faces 9B, 10B are detachably interposed across the axial end faces 3C, 3C and the axial end faces 9B, 1B.
The sleeves 3 and 3 and the first and second retainers 9 and 10 are detachably connected to each other in the axial direction by bringing 0B into contact therewith. In the figure, reference numeral 14 denotes a key, and the sleeve unit 3 is connected to the rotating shaft 2 so as to be simultaneously rotatable. The key 14 is not always necessary.

The procedure for mounting the above-described configuration will be described. First,
The rotary shaft 2 is held by the single retainers 9A, 9A in a state where the end surface of the first retainer 9 opposite to the axial end surface 9B of the single retainers 9A, 9A is brought into contact with the step 2A formed on the rotary shaft 2. Then, the retainers 9 </ b> A, 9 </ b> A are fastened by the fastening bolts 12 and integrally connected to each other to form the annular first retainer 9.

Next, the fixing means 15 composed of a plurality of set screws is screwed into the female screw hole 19, and the tip of the fixing means 15 is pressed strongly against the bottom of the concave portion 2B formed on the rotating shaft 2 so that the first retainer 9 is rotated. To be rotatable simultaneously.

Next, one half of the circumferential coupling means 8 formed by a knock pin is fitted into each of the plurality of blind through holes 3B of one sleeve unit 3, and the other half projects outside from the blind through hole 3B. In this state, one sleeve unit 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.

Further, circumferential coupling means 8 projecting from each of the plurality of blind holes 3B of one sleeve 3 is fitted into each of the plurality of blind holes 3B of the other sleeve 3. By bringing the mating surfaces 3A, 3A of the sleeves 3, 3 into contact with each other, the other sleeve 3 is applied to the other half of the outer peripheral surface of the rotary shaft 2 at the mounting position of the split type sleeve device 1 at the mounting position. Thus, the sleeves 3 and 3 are annularly connected.

Thereafter, blind through holes 17 formed in both axial end faces 3C, 3C of the sleeves 3, 3 respectively.
Then, one half of the axial coupling means 16 formed by a knock pin is fitted, and the other half is projected outside from the blind through hole 17.

Next, the sleeves 3 and 3 connected in a ring shape are moved toward the first retainer 9 so that the blind through holes 17 are formed.
The other half of the axial coupling means 16 protruding outward from the first retainer 9 is fitted into the blind through-hole 18 of the first retainer 9, and the one axial end face 3 </ b> C of the sleeve unit 3 is fixed to the axial end face of the first retainer 9. Contact 9B.

Subsequently, blind through holes 18 formed in the retainers 10A, 10A of the second retainer 10, respectively.
The axial coupling means 1 protruding outside from the blind through-hole 17 on the other axial end face 3C side of the sleeve units 3 and 3.
6 while fitting the other half, retainer 10A,
The ring-shaped second retainer 10 is formed by holding the rotating shaft 2 by 10A, fastening the pressing wheels 10A, 10A by fastening bolts 13 and integrally connecting them.

Further, the fixing means 15 composed of a plurality of set screws is screwed into the female screw hole 19, and the tip of the fixing means 15 is strongly pressed against the bottom of the concave portion 2B formed on the rotating shaft 2, so that the second retainer 10 is attached to the rotating shaft 2. The first and second sleeves 3 and 3 and the first and second retainers 10 are fixed to each other so as to be rotatable at the same time, and the axial end face 10B of the second retainer 10 is brought into contact with the other axial end face 3C of the sleeves 3 and 3. 9 and 10 are detachably connected in series in the axial direction, so that an attached state in which the sleeves 3 and 3 are fixed to the rotary shaft 2 so as to be simultaneously rotatable with respect to the rotary shaft 2 can be obtained.

On the other hand, in the above-described mounting state, for example, the set screw 15 fixing the second retainer 10 to the rotating shaft 2 is removed, the fastening of the fastening bolt 13 is released, and the second retainer 10 is disassembled. By removing
The sleeves 3 and 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 dowel pins 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. Both ends of the sleeves 3 and 3 in the axial direction are connected to the first and second retainers 9 and 1 by axial connecting means 16 including a plurality of knock pins.
As a result, the sleeves 3 and 3 can be reliably prevented from falling off and the radially expanding portions at both ends in the axial direction.

In the above embodiment, the sleeves 3 and 3 divided into two, the first retainer 9 and the second retainer 1 are divided.
0, but these sleeves 3 and 3
3. The division of the first retainer 9 and the second retainer 10 is 2
The invention is not limited to the division, and may be three or more. In addition, the first retainer 9 and the second retainer 1
0 may be an endless shape (annular type) instead of a split type. Further, the outer peripheral surfaces of the sleeves 3 and 3 are
Although the description has been given of the example of use in which the bearing is slidably contacted with the bearing surface, it is of course possible to use the bearing in sliding contact with the shaft sealing surface of the shaft sealing portion formed by the gland packing group.

[0027]

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. In addition, the axial coupling means can reliably prevent the sleeve itself from falling off and the radial expansion of both ends in the axial 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 a mounting state of a conventional example with a partial cross section.

FIG. 6 is a sectional view taken along line DD of FIG. 6;

FIG. 7 is a side view showing, in partial cross section, a mounting state of another conventional example.

FIG. 8 is a sectional view taken along line EE of FIG. 7;

FIG. 9 is an enlarged front view showing a state where a step is generated.

[Description of Signs] 1 Split type sleeve device 2 Rotating shaft 3 Sleeve alone 3A Mating surface 3C Axial end surfaces 8 Circular coupling means 9 First retainer 9B Axial end surface of first retainer 10 Second retainer 10B Second Axial end face of retainer 15 Fixing means 16 Axial coupling means

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; First and second retainers which are detachably disposed around the rotating shaft at both axial ends of a plurality of annularly coupled sleeves, and fixing means for detachably fixing these retainers to the rotating shaft. And the axially opposite end faces of the plurality of sleeves and the axially opposite end faces of the first and second retainers are detachably interposed across the opposite axial end faces of the first and second retainers. A split-type sleeve device, comprising: an axial coupling means for bringing the plurality of sleeves and the first and second retainers into contact with each other so as to be detachably and integrally coupled in the axial direction.