CN220378716U - Compressor shaft sleeve structure, pump body structure and compressor - Google Patents
Compressor shaft sleeve structure, pump body structure and compressor Download PDFInfo
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- CN220378716U CN220378716U CN202321914322.8U CN202321914322U CN220378716U CN 220378716 U CN220378716 U CN 220378716U CN 202321914322 U CN202321914322 U CN 202321914322U CN 220378716 U CN220378716 U CN 220378716U
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- sleeve body
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- 230000002093 peripheral effect Effects 0.000 claims abstract description 11
- 238000003825 pressing Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
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Abstract
The utility model relates to a shaft sleeve structure of a compressor, a pump body structure and the compressor, wherein the shaft sleeve structure of the compressor is arranged between a bearing and a crankshaft of the compressor and comprises a shaft sleeve body, the shaft sleeve body is of a tubular structure with two through ends, and a groove is formed on the peripheral wall of the shaft sleeve body along the radial recess of the shaft sleeve body; the bearing is provided with an accommodating cavity in interference fit with the shaft sleeve body, the shaft sleeve body is arranged in the accommodating cavity in an interference manner through the outer peripheral wall of the shaft sleeve body, and an avoidance space is formed between the groove and the accommodating cavity. According to the shaft sleeve structure of the compressor, the two short shaft sleeve bodies in the prior art are replaced by the long shaft sleeve body, the positioning between the long shaft sleeve body and the bearing is simple, the press fitting is simple and quick, the problem of large deformation of the bearing is avoided, and the assembly time and the labor cost are effectively reduced.
Description
Technical Field
The utility model relates to the technical field of compressors, in particular to a compressor shaft sleeve structure, a pump body structure and a compressor.
Background
With the expansion of compressor applications and the gradual expansion of compressor displacement, higher demands are placed on the reliability of compression. For the compressor, the crankshaft is stressed greatly in the whole operation process of the compressor, and often the crankshaft and the bearings are relatively weak parts, so that excessive abrasion is easy to generate, and the compressor is in failure. It is therefore common practice to sleeve the bearing portion of the compressor. The shaft sleeve is generally made of high-wear-resistance alloy materials.
Because the contact part of the inner diameter surface of the bearing and the crankshaft has higher requirements on the precision, the common practice is as follows: the semi-finished product of the bearing is processed to ensure that the inner diameter surface of the bearing has certain cylindricity coarse overrun, the bearing is pressed into the shaft sleeve on equipment, and then the inner diameter surface of the shaft sleeve is finished.
For the upper bearing, the friction force f in the process of pressing the shaft sleeve into the bearing is calculated as: f=uf=uf=pχ=u×pχ pi×r×h, where u is a friction coefficient, S is a contact area between the sleeve and the bearing, R is an outer diameter of the sleeve, and H is a height of the sleeve. As can be seen from the formula, the higher the shaft sleeve is, the larger the same interference pressing force is, and the larger the deformation of the bearing is, so that the manufacturing is not facilitated and the design requirement is difficult to meet. Thus, current upper bearings generally reduce the friction they are pressed into the bearing by employing two bushings.
However, the inner wall of the shaft sleeve is provided with an oil groove, and the oil groove has a certain installation angle requirement relative to the exhaust port, so that the lubrication and stress optimization can be ensured, and the problem that the positioning of the two shaft sleeves and the bearing is difficult exists, so that the two shaft sleeves are easy to be crushed and scrapped. On the other hand, two shaft sleeves are required to be pressed twice, so that the time is long and the labor cost is relatively high.
Disclosure of Invention
Based on the above, the utility model aims to overcome the defects of the prior art, and provide a compressor shaft sleeve structure, wherein two short shaft sleeve bodies in the prior art are replaced by one long shaft sleeve body, and the positioning between the long shaft sleeve body and a bearing is simple, the press mounting is simple and quick, the problem of large deformation of the bearing is avoided, and the assembly time and the labor cost are effectively reduced.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
the shaft sleeve structure of the compressor is arranged between a bearing and a crankshaft of the compressor and comprises a shaft sleeve body, wherein the shaft sleeve body is of a cylindrical structure with two ends penetrating, and a groove is formed in the peripheral wall of the shaft sleeve body along the radial recess of the shaft sleeve body; the bearing is provided with an accommodating cavity in interference fit with the shaft sleeve body, the shaft sleeve body is arranged in the accommodating cavity in an interference manner through the outer peripheral wall of the shaft sleeve body, and an avoidance space is formed between the groove and the accommodating cavity.
As one embodiment, the middle part of the outer side wall of the sleeve body is concavely formed with the groove along the radial direction thereof.
As one embodiment, the length of the groove along the axial direction of the shaft sleeve body is H, the length of the shaft sleeve body along the axial direction of the shaft sleeve body is H, and the following conditions are satisfied between H and H: h is more than or equal to 3mm and less than or equal to H-3mm.
As one embodiment, a distance between an upper end of the groove and an upper end of the sleeve body is d, and d satisfies: d is more than or equal to 3mm and less than or equal to H-6mm.
As one embodiment, the recess depth of the groove is a, the wall thickness of the sleeve body is B, and the requirements between a and B are: a is more than or equal to 0.001mm and less than or equal to B-0.2mm.
As one embodiment, the length of the groove along the circumferential direction of the sleeve body is L, the circumference of the sleeve body is C, and the following conditions are satisfied between L and C: l is less than or equal to C.
As an implementation mode, an oil groove communicated with two ends of the shaft sleeve body is formed in the inner wall of the shaft sleeve body.
As one embodiment, the oil groove is a spiral groove arranged around the central shaft of the shaft sleeve body.
Compared with the prior art, the compressor shaft sleeve structure has the beneficial effects that:
the compressor axle sleeve structure of this application is provided with the recess through on the peripheral wall of axle sleeve body, utilizes the space of dodging that forms between the holding chamber of recess and bearing, can effectively reduce the axle sleeve body and press the impressing force that produces when bearing, and then reduce the in-process that the axle sleeve body pressed the bearing and produce the deflection to realize the effect of extension axle sleeve body length, with replace two short axle sleeve bodies among the prior art through a long axle sleeve body, make the location between axle sleeve body and the bearing of this application simple and easy, and the pressure equipment between the two is simple and convenient, can not produce the too big problem of deformation to the bearing, and effectively reduce equipment time and cost of labor.
In another aspect, the present utility model provides a pump body structure comprising a compressor sleeve structure as described above. According to the pump body structure, the length of the improved shaft sleeve body can be prolonged by improving the shaft sleeve structure of the compressor, so that two shaft sleeves in the prior art are replaced, the assembly pressure between the shaft sleeve body and the bearing is effectively reduced, the assembly difficulty between the shaft sleeve body and the bearing is reduced, and the assembly time between the shaft sleeve body and the bearing is shortened.
On the other hand, the utility model also provides a compressor which comprises the pump body structure. According to the compressor, the shaft sleeve structure of the compressor is improved, so that the length of the improved shaft sleeve body can be prolonged, two shaft sleeves in the prior art are replaced, the assembly pressure between the shaft sleeve body and the bearing is effectively reduced, the assembly difficulty between the shaft sleeve body and the bearing is reduced, and the assembly time between the shaft sleeve body and the bearing is shortened.
For a better understanding and implementation, the present utility model is described in detail below with reference to the drawings.
Drawings
FIG. 1 is a schematic view of a compressor sleeve structure according to the present utility model;
FIG. 2 is a second schematic diagram of a compressor hub structure according to the present utility model;
FIG. 3 is a schematic cross-sectional view of a compressor sleeve structure of the present utility model;
FIG. 4 is a schematic cross-sectional view of a bearing of the present utility model;
FIG. 5 is a schematic cross-sectional view of a compressor sleeve structure of the present utility model coupled to a bearing;
fig. 6 is an enlarged partial schematic view of fig. 5.
Reference numerals illustrate: 10. a sleeve body; 11. a groove; 12. an oil drain; 20. a bearing; 21. the accommodating cavity.
Detailed Description
For further illustration of the various embodiments, the utility model is provided with the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments and together with the description, serve to explain the principles of the embodiments. With reference to these matters, one of ordinary skill in the art will understand other possible implementations and advantages of the present utility model.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus are not to be construed as limiting the present utility model.
Please refer to fig. 1 to 6; the embodiment provides a compressor shaft sleeve structure, which is arranged between a bearing 20 and a crankshaft of a compressor, and comprises a shaft sleeve body 10, wherein the shaft sleeve body 10 is of a tubular structure with two ends communicated, and a groove 11 is formed on the peripheral wall of the shaft sleeve body along the radial recess of the shaft sleeve body; the bearing 20 is provided with a containing cavity 21 in interference fit with the shaft sleeve body 10, the shaft sleeve body 10 is arranged in the containing cavity 21 through interference of the peripheral wall of the shaft sleeve body, and an avoidance space is formed between the groove 11 and the inner wall of the containing cavity 21.
In the present embodiment, the central portion of the outer sidewall of the sleeve body 10 is concavely formed with the groove 11 in the radial direction thereof. Thus, in the present embodiment, by recessing the groove 11 on the outer peripheral side of the sleeve body 10, the calculation formula according to the friction force f generated during the pressing of the sleeve body 10 into the bearing 20 is: f=uf=u×p×s=u×p×pi×r×h, the smaller the contact area between the sleeve body 10 and the bearing 20, the smaller the friction force F. Therefore, in this embodiment, through the avoiding space formed between the groove 11 and the bearing 20, the contact area between the sleeve body 10 and the bearing 20 in the interference fit of this embodiment is reduced, so as to achieve the effect of reducing the pressing force between the two. Therefore, on the premise of equal friction force f, the length of the sleeve body 10 of the present embodiment may be longer, so as to achieve the effect of replacing two short sleeve bodies 10 in the prior art.
Alternatively, the length of the groove 11 in the circumferential direction of the sleeve body 10 is L, the circumference of the sleeve body 10 is C, and the ratio between L and C satisfies: l is less than or equal to C. That is, the length of the groove 11 of the present embodiment in the circumferential direction of the sleeve body 10 may be less than or equal to the circumference length of the sleeve body 10. When l=c, the contact area between the sleeve body 10 and the bearing 20 can be optimized.
In addition, in other embodiments, when L < C, the sleeve body 10 may further have a plurality of grooves 11 formed on the outer sidewall thereof, and it should be noted that the number of the grooves 11 may be designed according to practical requirements and is not limited to one. On the other hand, the shape of the groove 11 is not further limited.
Optionally, the length of the groove 11 in the axial direction of the sleeve body 10 is H, the length of the sleeve body 10 in the axial direction is H, and the requirements between H and H are: h is more than or equal to 3mm and less than or equal to H-3mm. In this embodiment, the value of H may be, but is not limited to, one of 3mm, 5mm, and 8mm, and correspondingly, the value of H may be, but is not limited to, one of 6mm, 8mm, and 11 mm.
On the other hand, the distance between the upper end of the groove 11 and the upper end of the sleeve body 10 of the present embodiment is d, which satisfies: d is more than or equal to 3mm and less than or equal to H-6mm. Since H needs to satisfy: h is 3 mm.ltoreq.h is 3mm, so the value of H may be, but is not limited to, one of 9mm, 11mm, 14 mm. The value of d may be, but is not limited to, one of 3mm, 5mm, 8 mm.
In addition, the recess 11 of the present embodiment has a recess depth a, the wall thickness of the sleeve body 10 is B, and the requirements between a and B are: a is more than or equal to 0.001mm and less than or equal to B-0.2mm. Wherein, the value of A can be, but is not limited to, one of 0.001mm, 0.005mm and 0.01mm, and correspondingly, the value of B can be, but is not limited to, one of 0.201mm, 0.205mm and 0.21 mm.
Optionally, the inner wall of the sleeve body 10 of the present embodiment is provided with an oil groove 12 communicating with two ends of the sleeve body 10. The oil groove 12 is a spiral groove arranged around the central axis of the shaft sleeve body 10.
Compared with the prior art, the compressor shaft sleeve structure of the application, through being provided with recess 11 on the peripheral wall of shaft sleeve body 10, utilize the space of dodging that forms between recess 11 and the accommodation chamber 21 of bearing 20, the pressing force that produces when can effectively reducing shaft sleeve body 10 and impress bearing 20, and then reduce the deformation that shaft sleeve body 10 impressed bearing 20's in-process produced to realize the effect of extension shaft sleeve body 10 length, with replace two short shaft sleeve bodies 10 among the prior art through a long shaft sleeve body 10, make the location between shaft sleeve body 10 of the application and the bearing 20 simple and easy, and the pressure equipment between the two is simple and convenient, can not produce the too big problem of deformation to bearing 20, and effectively reduce equipment time and cost of labor.
In another aspect, the present utility model provides a pump body structure comprising a compressor sleeve structure as described above. According to the pump body structure, the length of the improved shaft sleeve body 10 can be prolonged by improving the shaft sleeve structure of the compressor, so that two shaft sleeves in the prior art are replaced, the assembly pressure between the shaft sleeve body 10 and the bearing 20 is effectively reduced, the assembly difficulty between the shaft sleeve body 10 and the bearing 20 is reduced, and the assembly time between the shaft sleeve body and the bearing 20 is shortened.
On the other hand, the utility model also provides a compressor which comprises the pump body structure. According to the compressor, the length of the improved shaft sleeve body 10 can be prolonged by improving the shaft sleeve structure of the compressor, so that two shaft sleeves in the prior art are replaced, the assembly pressure between the shaft sleeve body 10 and the bearing 20 is effectively reduced, the assembly difficulty between the shaft sleeve body 10 and the bearing 20 is reduced, and the assembly time between the shaft sleeve body and the bearing 20 is shortened.
The above examples merely represent a few embodiments of the present utility model, which are described in more detail and detail, but are not to be construed as limiting the scope of the compressor sleeve structure, pump body structure and compressor of the present utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model.
Claims (10)
1. The utility model provides a compressor axle sleeve structure, its setting is between bearing and the bent axle of compressor, its characterized in that:
the shaft sleeve comprises a shaft sleeve body which is of a tubular structure with two through ends, and a groove is formed in the peripheral wall of the shaft sleeve body along the radial direction of the shaft sleeve body in a recessed manner; the bearing is provided with an accommodating cavity in interference fit with the shaft sleeve body, the shaft sleeve body is arranged in the accommodating cavity in an interference manner through the outer peripheral wall of the shaft sleeve body, and an avoidance space is formed between the groove and the accommodating cavity.
2. The compressor sleeve structure of claim 1, wherein:
the middle part of the outer side wall of the shaft sleeve body is concavely formed with the groove along the radial direction of the shaft sleeve body.
3. The compressor sleeve structure of claim 2, wherein:
the length of the groove along the axial direction of the shaft sleeve body is H, the length of the shaft sleeve body along the axial direction of the shaft sleeve body is H, and the requirements between H and H are satisfied: h is more than or equal to 3mm and less than or equal to H-3mm.
4. A compressor sleeve structure according to claim 3, wherein:
the distance between the upper end of recess and the upper end of axle sleeve body is d, d satisfies: d is more than or equal to 3mm and less than or equal to H-6mm.
5. The compressor sleeve structure of claim 2, wherein:
the recess depth of recess is A, the wall thickness of axle sleeve body is B, satisfy between A with B: a is more than or equal to 0.001mm and less than or equal to B-0.2mm.
6. The compressor sleeve structure of claim 2, wherein:
the length of the groove along the circumferential direction of the shaft sleeve body is L, the circumference of the shaft sleeve body is C, and the L and the C satisfy the following conditions: l is less than or equal to C.
7. The compressor sleeve structure of claim 1, wherein:
the inner wall of the shaft sleeve body is provided with an oil groove communicated with two ends of the shaft sleeve body.
8. The compressor sleeve structure of claim 7, wherein:
the oil groove is a spiral groove which is arranged around the central shaft of the shaft sleeve body.
9. The utility model provides a pump body structure which characterized in that:
a compressor sleeve structure comprising any one of claims 1 to 8.
10. A compressor, characterized in that:
comprising a pump body structure as claimed in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321914322.8U CN220378716U (en) | 2023-07-19 | 2023-07-19 | Compressor shaft sleeve structure, pump body structure and compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321914322.8U CN220378716U (en) | 2023-07-19 | 2023-07-19 | Compressor shaft sleeve structure, pump body structure and compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220378716U true CN220378716U (en) | 2024-01-23 |
Family
ID=89571292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321914322.8U Active CN220378716U (en) | 2023-07-19 | 2023-07-19 | Compressor shaft sleeve structure, pump body structure and compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220378716U (en) |
-
2023
- 2023-07-19 CN CN202321914322.8U patent/CN220378716U/en active Active
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