Driving bearing bushing for oil-free vortex machine

Abstract

The utility model relates to a drive bearing bushing for an oilless scroll machine, the drive bearing bushing comprises a bushing body, a plurality of first reinforcing ribs, at least one second reinforcing rib and an oil baffle groove, the plurality of first reinforcing ribs are sequentially arranged at intervals along the outer wall surface of the bushing body, the extension direction of each first reinforcing rib is the axial direction of the bushing body, and the oil baffle groove is arranged on the outer wall surface of the bushing body. The second reinforcing ribs are arranged on the outer wall face of the bushing body in a surrounding mode, the first reinforcing ribs and the second reinforcing ribs are arranged in a crossed mode, the first reinforcing ribs and the second reinforcing ribs protrude out of the bushing body outwards in the radial direction, and an annular oil blocking groove is formed in at least one end face of the bushing body in a surrounding mode. The first reinforcing ribs and the second reinforcing ribs enable the driving bearing bushing and the driving disc to be combined more tightly, the driving bearing bushing is prevented from moving and rotating relative to the driving disc, the contact area with the driving disc is increased, and the heat dissipation efficiency is improved; the oil retaining groove structure prevents lubricating grease from overflowing from the pouring junction surface, keeps good operation of the bearing, prevents a machine from being stuck, and prolongs the service life of the machine.

Description

Technical Field

[0001] The utility model relates to the technical field of air compressors, in particular to a driving bearing sleeve for an oil-free scroll machine. Background Art

[0002] The bearing sleeves used in the drive disk on the scroll air compressor are all processed from 45# steel and combined with the aluminum inner wall of the drive disk by casting. The reinforcing ribs on the outer wall of the traditional drive disk bearing sleeve only play the role of preventing the bearing sleeve from moving forward and backward axially. The sleeve will rotate relative to the drive disk in the drive disk, affecting the life of the machine; in addition, the central bearing of the oil-free scroll air compressor drive disk is lubricated and dissipated by grease. In the traditional bearing sleeve that uses grease, the grease is more likely to overflow from the casting joint surface, causing the bearing to heat up quickly and the machine to get stuck, affecting the service life of the machine. Utility Model Content

[0003] The purpose of the utility model is to provide a driving bearing sleeve for an oil-free scroll machine to address the defects in the prior art that the bearing sleeve is easy to rotate relative to the driving disk, and the grease is easy to overflow from the casting joint surface, thereby causing the bearing to heat up quickly and the machine to get stuck, thus affecting the life of the machine.

[0004] The utility model solves the above technical problems through the following technical solutions:

[0005] The utility model provides a driving bearing sleeve for an oil-free scroll machine, which is characterized in that the driving bearing sleeve comprises a sleeve body, a plurality of first reinforcing ribs, at least one second reinforcing rib and an oil retaining groove, wherein the plurality of first reinforcing ribs are arranged in sequence and at intervals along the outer wall surface of the sleeve body, and the extension direction of each of the first reinforcing ribs is the axial direction of the sleeve body, the second reinforcing ribs are arranged around the outer wall surface of the sleeve body, the plurality of first reinforcing ribs are arranged crosswise with the second reinforcing ribs, the first reinforcing ribs and the second reinforcing ribs both protrude radially outward from the sleeve body, and an annular oil retaining groove is arranged around at least one end surface of the sleeve body.

[0006] Preferably, a plurality of the first reinforcing ribs are arranged to cross perpendicularly with the second reinforcing ribs.

[0007] Preferably, the distance between the first reinforcing rib and the second reinforcing rib and the outer wall surface of the insert body is 1-5 mm.

[0008] Preferably, the cross-sectional shape of the oil retaining groove is U-shaped.

[0009] Preferably, both sides of the bottom of the oil retaining groove are connected and transitioned to the insert sleeve body by circular arc chamfers.

[0010] Preferably, the insert body is provided with a central through hole, and two ends of the central through hole are circumferentially provided with a circle of chamfers expanding from the inside to the outside.

[0011] Preferably, the insert body is annular.

[0012] On the basis of conforming to the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present utility model.

[0013] The positive progressive effect of the utility model is that the driving bearing sleeve for the oil-free scroll machine of the utility model is to set the first reinforcing rib and the second reinforcing rib structure on the outer wall surface of the sleeve body, so that the driving bearing sleeve can be more tightly combined with the driving disk, preventing the driving bearing sleeve from moving and rotating relative to the driving disk, while increasing the contact area with the inner wall of the bearing hole of the driving disk, thereby improving the heat dissipation efficiency of the driving bearing sleeve; the oil retaining groove structure can prevent grease from overflowing from the casting joint surface, thereby maintaining the good operation of the bearing, avoiding the occurrence of machine jamming, and increasing the service life of the machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The utility model is a three-dimensional structural schematic diagram of a driving bearing sleeve for an oil-free scroll machine.

[0015] Figure 2 The utility model is a schematic cross-sectional view of a drive bearing sleeve for an oil-free scroll machine.

[0016] Description of reference numerals:

[0017] Nest body 1

[0018] First reinforcement rib 2

[0019] Second reinforcement rib 3

[0020] Oil retaining groove 4

[0021] Chamfer 5

[0022] Center through hole 6 DETAILED DESCRIPTION

[0023] The present invention will be described more clearly and completely below by way of embodiments in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiments.

[0024] The utility model discloses a driving bearing sleeve for an oil-free vortex machine, such as Figure 1-2As shown, the drive bearing sleeve includes a sleeve body 1, a plurality of first reinforcing ribs 2, at least one second reinforcing rib 3 and an oil retaining groove 4. The plurality of first reinforcing ribs 2 are arranged in sequence along the outer wall surface of the sleeve body 1 at intervals, and the extension direction of each first reinforcing rib 2 is the axial direction of the sleeve body 1. The second reinforcing rib 3 is arranged around the outer wall surface of the sleeve body 1. The plurality of first reinforcing ribs 2 are arranged crosswise with the second reinforcing ribs 3. The first reinforcing ribs 2 and the second reinforcing ribs 3 both protrude radially outward from the sleeve body 1. An annular oil retaining groove 4 is arranged around at least one end surface of the sleeve body 1.

[0025] Specifically, the drive bearing sleeve is used for the installation connection between the bearing and the inner wall of the drive disk. The first reinforcing rib 2 and the second reinforcing rib 3 are cross-arranged on the outer wall surface of the sleeve body 1, so that the drive bearing sleeve can be more closely combined with the inner wall of the drive disk, which can effectively prevent the drive bearing sleeve from moving and rotating in the drive disk, eliminate the deformation force caused by thermal expansion, and ensure the strength; it also increases the contact area with the inner wall of the drive disk to improve the heat conduction efficiency and increase the service life of the machine body. The structure of the oil retaining groove 4 can effectively prevent the grease in the central bearing of the drive disk from leaking, and prevent the main shaft and the bearing from generating high temperature due to less grease, which causes the bearing retainer to carbonize and the machine to get stuck. The first reinforcing rib 2 can be a square strip, and the second reinforcing rib 3 can be a circular ring, with a simple structure and easy production. Of course, the shape of the first reinforcing rib 2 and the second reinforcing rib 3 can also be selected according to needs, which can be a triangle, a waist, a parallelogram, etc.

[0026] In this embodiment, the plurality of first reinforcing ribs 2 are arranged to cross the second reinforcing ribs 3 at right angles.

[0027] Specifically, the first reinforcing ribs 2 are vertically crossed with the second reinforcing ribs 3 to form a plurality of cross-shaped first-connections, so that the drive bearing sleeve can be more tightly combined with the inner wall of the drive disk, and can effectively prevent the drive bearing sleeve from axial movement and circumferential rotation in the drive disk.

[0028] In this embodiment, the first reinforcing rib 2 and the second reinforcing rib 3 are both 1-5 mm away from the outer wall of the insert sleeve body 1, which effectively prevents the drive bearing insert sleeve from axial movement and circumferential rotation in the drive disc.

[0029] In this embodiment, the cross-sectional shape of the oil retaining groove 4 is U-shaped. Specifically, the cross-sectional shape of the oil retaining groove 4 is U-shaped, which has a simple structure, is easy to produce, has a good oil retaining effect, and effectively prevents grease leakage. The cross-sectional shape of the oil retaining groove 4 can also be square, trapezoidal, V-shaped, W-shaped, etc.

[0030] In this embodiment, both sides of the bottom of the oil retaining groove 4 are connected and transitioned to the insert sleeve body 1 by arc chamfers.

[0031] Specifically, both sides of the bottom of the oil retaining groove 4 are connected to the sleeve body 1 by arc chamfers, which can reduce the stress concentration and damage of the oil retaining groove 4 caused by the bearing operation, improve the service life of the drive bearing sleeve, and facilitate the cleaning of oil stains.

[0032] In this embodiment, the insert body 1 is provided with a central through hole 6 , and a circle of chamfers 5 expanding from the inside to the outside are circumferentially provided at both ends of the central through hole 6 .

[0033] Specifically, the insert body 1 is cylindrical and annular, and both ends of the central through hole 6 are provided with outwardly expanded chamfers 5 to facilitate the insert body 1 to be sleeved outside the bearing.

[0034] In this embodiment, the insert body 1 is in a circular ring shape.

[0035] Specifically, the insert body 1 is in a circular ring shape, has a simple structure, is easy to replace, and has strong adaptability.

[0036] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. A drive bearing sleeve for an oil-free scroll machine, characterized in that: The driving bearing sleeve includes a sleeve body, a plurality of first reinforcing ribs, at least one second reinforcing rib and an oil retaining groove. The plurality of first reinforcing ribs are arranged in sequence along the outer wall surface of the sleeve body, and the extension direction of each of the first reinforcing ribs is the axial direction of the sleeve body. The second reinforcing ribs are arranged around the outer wall surface of the sleeve body. The plurality of first reinforcing ribs are arranged crosswise with the second reinforcing ribs. The first reinforcing ribs and the second reinforcing ribs both protrude radially outward from the sleeve body. An annular oil retaining groove is arranged around at least one end surface of the sleeve body.

2. The driving bearing sleeve for an oil-free scroll machine according to claim 1, characterized in that: The plurality of first reinforcing ribs are arranged to cross perpendicularly with the second reinforcing ribs.

3. The driving bearing sleeve for an oil-free scroll machine according to claim 1, characterized in that: The distance between the first reinforcing rib and the second reinforcing rib and the outer wall surface of the insert body is 1-5 mm.

4. The driving bearing sleeve for an oil-free scroll machine according to claim 1, characterized in that: The cross-sectional shape of the oil retaining groove is U-shaped.

5. The driving bearing sleeve for an oil-free scroll machine according to claim 1, characterized in that: Both sides of the bottom of the oil retaining groove are connected and transitioned with the insert sleeve body by circular arc chamfers.

6. The driving bearing sleeve for an oil-free scroll machine according to claim 1, characterized in that: The insert sleeve body is provided with a central through hole, and two ends of the central through hole are circumferentially provided with a circle of chamfers expanding from the inside to the outside.

7. The driving bearing sleeve for an oil-free scroll machine according to claim 1, characterized in that: The insert sleeve body is in the shape of a circular ring.

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