CN215566618U

CN215566618U - Screw compressor

Info

Publication number: CN215566618U
Application number: CN202121464131.7U
Authority: CN
Inventors: 罗胜洋; 孙刚; 陈川
Original assignee: Ningbo Xinda Screw Compressor Co ltd
Current assignee: Ningbo Xinda Screw Compressor Co ltd
Priority date: 2021-06-29
Filing date: 2021-06-29
Publication date: 2022-01-18
Anticipated expiration: 2031-06-29

Abstract

The utility model provides a screw compressor, and belongs to the field of compressors. It has solved the problem in clearance can appear after current compressor wearing and tearing. The compressor comprises an oil-cooled motor, a gear shaft is inserted in the oil-cooled motor, a machine body is connected with the oil-cooled motor, a bearing assembly is arranged in the machine body, the gear shaft penetrates through the bearing assembly, an elastic piece is arranged between the machine body and the bearing assembly, and extrusion forces are respectively arranged between the elastic piece and the machine body as well as between the elastic piece and the bearing assembly. The screw compressor has the advantages of automatically eliminating the clearance and avoiding the movement of the screw main machine.

Description

Screw compressor

Technical Field

The utility model belongs to the technical field of compressors, and relates to a screw compressor.

Background

Screw compressor receives extensive application in market because it has advantages such as the operation is reliable, longe-lived, convenient operation, automation are high, and traditional screw compressor adopts deep groove ball bearing and cylindrical roller bearing cooperation to use both ends on the gear shaft mostly, and the phenomenon of gear shaft drunkenness can appear when leading to the screw rod host computer when the operation because the existence of the inside internal clearance of bearing of this kind of scheme, and then leads to screw rod host computer oil blanket wearing and tearing, and the oil leak phenomenon appears in the host computer.

Disclosure of Invention

The utility model aims to solve the problems in the prior art, and provides a screw compressor which can automatically eliminate a gap and avoid the movement of a screw main machine.

The purpose of the utility model can be realized by the following technical scheme: a screw compressor comprising:

the oil cooling motor is internally inserted with a gear shaft;

the oil cooling motor is connected with the oil cooling motor, a bearing assembly is arranged in the oil cooling motor, and the gear shaft penetrates through the bearing assembly;

the elastic part is arranged between the machine body and the bearing assembly, and extrusion forces are respectively arranged between the elastic part and the machine body as well as between the elastic part and the bearing assembly.

In the above screw compressor, the bearing assembly includes a conical bearing and a backing plate that abuts against the conical bearing, and the gear shaft sequentially passes through the conical bearing and the backing plate.

In the above screw compressor, the conical bearing includes an inner ring abutting against the gear shaft and an outer ring abutting against the body, and the backing plate abuts against the outer ring.

In the above screw compressor, the gear shaft is provided with the sleeve, and one end surface of the sleeve abuts against the inner ring.

In the above screw compressor, the elastic member includes a plurality of first protrusions that abut against the base plate and second protrusions that abut against the body.

In the screw compressor, the grooves are formed between the adjacent first protrusions and between the adjacent second protrusions, the bearing retainer ring is mounted at one end of the gear shaft, and the bearing retainer ring abuts against the inner ring.

In the screw compressor, the gear shaft is provided with the shaft sleeve, and the shaft sleeve is provided with the first oil seal ring and the second oil seal ring.

In the screw compressor, the oil-cooled motor is detachably connected with a gear box cover, the gear box cover is connected with the machine body, and a shaft seal gland is arranged in the gear box cover.

In the above screw compressor, the shaft seal gland is provided with a first clamping part for propping against the first oil seal ring and a second clamping part for propping against the second oil seal ring.

In the above screw compressor, the shaft seal gland is located between the first oil seal ring and the second oil seal ring, and an oil through hole is formed.

Compared with the prior art, the utility model has the following beneficial effects:

1. when a gap appears between the conical bearing and the machine body or a gap appears inside the conical bearing, the base plate acted by the extrusion force of the elastic piece can automatically push the conical bearing, and the conical bearing automatically fills the gap between the conical bearing and the machine body or the gap inside the conical bearing by means of conical design, so that the gear shaft is prevented from losing the limit of the conical bearing and loosening, and oil leakage of the compressor is avoided.

2. The gear shaft is provided with a first oil seal ring and a second oil seal ring, so that leaked oil is effectively prevented from entering the compressor.

3. Leaked oil can enter the oil through hole in the shaft seal gland and is finally conveyed to the machine body for reuse, and the quality problem caused by oil leakage is avoided.

Drawings

FIG. 1 is a schematic structural diagram of a preferred embodiment of the present invention.

Fig. 2 is a cross-sectional view of the present invention.

Fig. 3 is an enlarged schematic view of fig. 2 at a.

Fig. 4 is an enlarged structural view at B of fig. 2.

Fig. 5 is a schematic view of the structure of the elastic member.

Fig. 6 is a schematic structural view of the gland seal.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in fig. 1 to 6, a screw compressor of the present invention includes: in the utility model, the oil-cooled motor 100 rotates to drive the gear shaft 200 and the bearing assembly 400 on the gear shaft 200 to rotate, after long-time operation, the bearing assembly 400 can move in a dislocation way relative to the machine body 300 due to abrasion, so that gaps are generated between the bearing assembly 400 and the machine body 300 and in the bearing assembly 400, at the moment, the elastic member 500 propping against the bearing assembly 400 gives extrusion force to the bearing assembly 400, so that the bearing assembly 400 generates fine movement, and the gaps between the bearing assembly 400 and the machine body 300 and in the bearing assembly 400 are eliminated by readjusting the position relationship between the bearing assembly 400 and the machine body 300, maintaining stable operation of the gear shaft 200.

The bearing assembly 400 comprises a conical bearing 410 and a backing plate 420 which props against the conical bearing 410, the gear shaft 200 sequentially passes through the conical bearing 410 and the backing plate 420, the elastic member 500 props against the backing plate 420, the conical bearing 410 comprises an inner ring 411 which props against the gear shaft 200 and an outer ring 412 which props against the machine body 300, the backing plate 420 props against the outer ring 412, a sleeve 210 is arranged on the gear shaft 200, one end face of the sleeve 210 props against the inner ring 411, in the operation process of the screw compressor, the outer ring 412 of the conical bearing 410 is propped against the machine body 300 by the backing plate 420, the inner ring 411 is propped against by the sleeve 210, and stable operation in the conical bearing 410 is realized, wherein the outer ring 412 is in a conical shape, rollers 413 are arranged between the outer ring 412 and the inner ring 411, and at the moment, the inner ring 411, the outer ring 412 and the rollers 413 are in a tight fit state, and in the long-time operation process of the screw compressor, the outer ring 412 and the rollers 413 are worn, so that the outer ring 412 and the rollers are worn, and the outer ring 300 are caused, A gap is formed between the outer ring 412 and the roller 413, the conical bearing 410 is loose and is no longer in a tight fit state, the gear shaft 200 cannot be limited, the gear shaft 200 is made to shake, and the risk of oil leakage occurs.

The elastic member 500 includes a plurality of first protrusions 510 abutting against the backing plate 420 and second protrusions 520 abutting against the body 300, grooves 530 are formed between two adjacent first protrusions 510 and between two adjacent second protrusions 520, in a normal state, the rollers 413 and the outer ring 412 are in a close-fitting state, the gear shaft 200 stably operates, when the outer ring 412 or the rollers 413 on the conical bearing 410 are worn, a gap is formed between the outer ring 412 and the roller 413 bearing, the outer ring 412 and the roller 413 bearing are no longer in a close-fitting state, the gear shaft 200 penetrating into the conical gear shakes and cannot stably operate, at this time, the second protrusions 520 continue to abut against the body, the pressing force of the first protrusions 510 pushes the backing plate 420, the outer ring 412 is further pushed, the grooves 530 become large, the pushing of the outer ring 512 eliminates the gap, the inner ring 411, the outer ring 412 and the rollers 413 are in a close-fitting state again, the conical bearing 410 again abuts against the gear shaft 200, the gear shaft 200 is limited from moving, so that the stable operation of the screw compressor is kept, and the risk of oil leakage is avoided.

One end of the gear shaft 200 is provided with a bearing retainer 220, the bearing retainer 220 abuts against the inner ring 411, the sleeve 210 abuts against the outer ring 412 to limit the movement of the inner ring 411, the gear shaft 200 is provided with a shaft sleeve 230, the shaft sleeve 230 is provided with a first oil seal 231 ring and a second oil seal 231 ring, the first oil seal 231 ring and the second oil seal 231 ring provide double sealing action to avoid oil leakage accidents, the oil-cooled motor 100 is detachably connected with a gearbox cover 600, the gearbox cover 600 is connected with the machine body 300, a shaft seal gland 610 is arranged in the gearbox cover 600, the shaft seal gland 610 is provided with a first clamping piece 611 abutting against the first oil seal 231 ring and a second clamping piece 612 abutting against the second oil seal 231 ring, the first clamping piece 611 is matched with the shaft seal gland 610 to limit the movement of the first oil seal 231 ring, the second clamping piece 612 is matched with the gland 610 to limit the movement of the second oil seal ring, the gland 610 is arranged between the first oil seal 231 ring and the second oil seal 231 ring and is provided with a through hole 613, when the first oil seal 231 ring fails and leaks oil, the leaked oil is blocked by the second oil seal 231 ring, then enters the oil through hole 613, passes through the oil delivery pipe 614, returns to the machine body 300 again and is recycled, and the quality problem caused by oil leakage is avoided.

In the screw compressor, under the normal motion state, the inner ring 411, the tight fit between roller 413 and outer ring 412, the movement of gear shaft 200 is limited by conical bearing 410, make the operation that gear shaft 200 can be stable, when appearing the clearance because wearing and tearing between roller 413 and outer ring 412, outer ring and the fuselage, conical bearing 410 is not hard up, can't effectively limit the removal of gear shaft 200, lead to the gear shaft 200 to appear rocking, the oil leak risk appears, the extrusion force of elastic component 500 can promote outer ring 412 this moment, make inner ring 411, become the tight fit relation again between outer ring 412 and the roller 413 with the help of the conical structure of outer ring 412, so, conical bearing 410 is automatic to withstand gear shaft 200, make gear shaft 200 can't produce rocking, the steady operation again, the risk of oil leak has been avoided.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

Moreover, descriptions of the present invention as relating to "first," "second," "a," etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating a number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

Claims

1. A screw compressor, comprising:

the oil cooling motor is internally inserted with a gear shaft;

the elastic piece is arranged between the machine body and the bearing assembly, and extrusion forces are arranged between the elastic piece and the machine body and between the elastic piece and the bearing assembly.

2. The screw compressor according to claim 1, wherein the bearing assembly includes a conical bearing and a backing plate abutting against the conical bearing, and the gear shaft passes through the conical bearing and the backing plate in this order.

3. The screw compressor according to claim 2, wherein the conical bearing includes an inner ring abutting against the gear shaft and an outer ring abutting against the body, and the backing plate abuts against the outer ring.

4. A screw compressor according to claim 3 wherein a sleeve is provided on the gear shaft, an end face of the sleeve abutting the inner ring.

5. A screw compressor according to claim 3, wherein said elastic member includes a plurality of first projections which are held against said back plate and a plurality of second projections which are held against said body.

6. The screw compressor of claim 5, wherein a groove is formed between the adjacent first protrusions and between the adjacent second protrusions, and a bearing retainer ring is mounted at one end of the gear shaft and abuts against the inner ring.

7. The screw compressor according to claim 1, wherein the gear shaft is provided with a shaft sleeve, and the shaft sleeve is provided with a first oil seal ring and a second oil seal ring.

8. The screw compressor according to claim 7, wherein a gear box cover is detachably connected to the oil-cooled motor, the gear box cover is connected to the machine body, and a shaft seal gland is arranged in the gear box cover.

9. The screw compressor according to claim 8, wherein the shaft seal gland has a first retaining member for retaining the first oil seal ring and a second retaining member for retaining the second oil seal ring.

10. The screw compressor of claim 8, wherein the shaft seal gland is disposed between the first oil seal ring and the second oil seal ring and has an oil through hole.