CN212407063U

CN212407063U - Centrifugal compressor

Info

Publication number: CN212407063U
Application number: CN202021295632.2U
Authority: CN
Inventors: 吕鹏; 曹施鹏; 林伟伟; 冯凯
Original assignee: Shanghai Youshe Power Technology Co ltd
Current assignee: Shanghai Youshe Power Technology Co ltd
Priority date: 2020-07-03
Filing date: 2020-07-03
Publication date: 2021-01-26
Anticipated expiration: 2030-07-03

Abstract

The utility model belongs to the technical field of compressors, in particular to a centrifugal compressor, which comprises a pneumatic module and a motor component; the pneumatic module comprises a volute, a diffuser, a fluid director and an impeller, the volute is arranged on the motor through a flange, the impeller and the diffuser are both arranged in the volute, the power output end of the motor assembly penetrates through the flange and the volute to be in transmission connection with the impeller, an air inlet of the volute is arranged at one end, far away from the motor assembly, of the volute, and the fluid director is arranged at the air inlet. Pneumatic module among this centrifugal compressor passes through the flange and is connected with motor element, when the flow or the pressure of the air of this centrifugal compressor output of needs adjustment, can be directly through changing the pneumatic module of unidimensional to make this centrifugal compressor can satisfy in the condition of the user demand of various differences, therefore need not to prepare the demand that the compressor of many different models also can satisfy equipment work.

Description

Centrifugal compressor

Technical Field

The utility model belongs to the technical field of the compressor, concretely relates to centrifugal compressor.

Background

The centrifugal compressor is a turbine compressor, and the kinetic energy of gas is improved by the centrifugal force action given to the gas by the high-speed rotation of an impeller, and then the flow velocity of the gas is reduced by the action of a diffuser so as to improve the gas pressure. The centrifugal compressor has the advantages of large air flow, simple and compact structure, light weight, small unit size, small occupied area and the like, so that the centrifugal compressor is widely applied to the industries of chemical industry, petroleum, refrigeration, sewage treatment and the like.

The existing compressor has more parts, so that the dismounting steps of the compressor are very complicated in the maintenance process, and particularly, when the compressor breaks down and wearing parts such as a bearing, a rotor and the like need to be replaced, maintenance personnel need to completely dismount parts such as a volute, a diffuser and the like to be repaired or replaced, so that the maintenance of the compressor cannot be finished on a working site and only can be returned to a factory for maintenance;

in addition, the motor and the shell of the direct-drive centrifugal compressor are designed in a customized mode, the flow and the pressure of each model are limited, and under different working environments, the flow and the pressure can be adjusted only by replacing compressors of different models, so that the requirement that a plurality of compressors of different models can meet the working requirement of equipment can be met. Accordingly, it is an urgent technical problem to provide a compressor capable of adjusting a flow rate and a pressure of the compressor according to a use demand.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problems existing in the prior art, the present invention provides a centrifugal compressor to solve the technical problem that the flow and pressure of the compressor existing in the prior art can not be adjusted according to the use condition.

The utility model discloses a following technical scheme specifically realizes:

a centrifugal compressor includes a pneumatic module and a motor assembly;

the pneumatic module comprises a volute, a diffuser, a fluid director and an impeller, the volute is arranged on the motor assembly through a flange, the impeller and the diffuser are arranged in the volute, the power output end of the motor assembly penetrates through the flange and the volute and the impeller are connected in a transmission mode, an air inlet of the volute is arranged at one end, far away from the motor assembly, of the volute, and the fluid director is arranged at the air inlet.

In order to better realize the utility model discloses, do further optimization in above-mentioned structure, motor element includes fixed module and pivot, fixed module includes casing, stator and bearing frame, the stator sets up in the casing, the quantity of bearing frame has two, two the bearing frame sets up respectively the both ends of casing, the pivot is passed the stator, just the pivot is rotated and is set up on the bearing frame, the pivot with impeller transmission connects.

In order to achieve the above object, the present invention provides a stator for a motor, wherein the stator is disposed in the housing through an encapsulation process.

In order to achieve the object, the present invention is further optimized in the above structure, wherein the rotating shaft is rotatably disposed on the bearing seat through a radial air foil bearing.

In order to better realize the utility model discloses, do further optimization in above-mentioned structure, be provided with the pilot hole on the spiral case, be provided with on the flange with the boss that the pilot hole matches, the spiral case with the flange passes through the pilot hole with the cooperation zonulae occludens of boss.

In order to better realize the utility model discloses, do further optimization in above-mentioned structure, the inner ring of flange is provided with annular sealing member, the pivot is passed the sealing member with impeller transmission is connected, the diameter of air intake is greater than the diameter of sealing member, the diameter of sealing member is greater than the diameter of bearing frame.

In order to better realize the utility model discloses, do further optimization in above-mentioned structure, be provided with the thrust dish in the pivot, the thrust dish be located the sealing member with between the bearing frame.

In order to achieve better the utility model discloses, do further optimization in above-mentioned structure, the thrust dish with between the bearing frame and the thrust dish with all be provided with thrust air foil bearing between the sealing member.

In order to better realize the utility model discloses, do further optimization in above-mentioned structure, be provided with on the casing and be convenient for fixed motor element's motor cabinet.

In order to better realize the utility model discloses, do further optimization in above-mentioned structure, pneumatic module includes one-level compression portion and second grade compression portion, one-level compression portion with second grade compression portion sets up respectively motor element's both ends.

To sum up, the utility model discloses following technological effect has:

pneumatic module among this centrifugal compressor passes through the flange and is connected with motor element, when the flow or the pressure of the air of this centrifugal compressor output of needs adjustment, can be directly through changing the pneumatic module of unidimensional to make this centrifugal compressor can satisfy in the condition of various different demands, therefore need not to prepare the demand that the compressor of many different models also can satisfy equipment work.

Furthermore, the utility model discloses an optimization scheme still has following technological effect:

(1) the utility model discloses an optimization scheme passes through the embedment technology for the stator and sets up in the casing to install the bearing frame and form fixed module at the both ends of casing, then carry out the finish machining to the bearing frame again, so that the axiality and the straightness that hangs down of bearing frame, thereby make this centrifugal compressor's production, make convenience more.

(2) The utility model discloses an optimization scheme is provided with the pilot hole on the spiral case, and keeps apart through the sealing member between pneumatic module and the motor element, when needing to change the inside vulnerable part of motor element, maintenance personal can take off divertor, impeller and sealing member in proper order, then alright with take out the inside bearing of motor element, bearing frame and pivot and maintain or change to make this centrifugal compressor's maintenance convenience more.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a centrifugal compressor according to the present invention;

FIG. 2 is an exploded view of a centrifugal compressor according to the present invention;

fig. 3 is a schematic structural diagram of a motor assembly in a centrifugal compressor according to the present invention;

fig. 4 is a schematic structural diagram of a pneumatic module in a centrifugal compressor according to the present invention;

fig. 5 is a schematic structural view of a rotating shaft in a centrifugal compressor according to the present invention.

Reference numerals:

1. a pneumatic module; 11. a volute; 111. an assembly hole; 12. a diffuser; 13. a fluid director; 14. an impeller; 15. a flange; 2. a motor assembly; 21. a fixed module; 211. a housing 212, a stator; 213. a bearing seat; 22. a rotating shaft; 3. a radial air foil bearing; 4. a seal member; 5. a thrust disc; 6. a thrust air foil bearing; 7. a motor base.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The first embodiment is as follows:

as shown in fig. 1 to 5:

a centrifugal compressor comprises a pneumatic module 1 and a motor assembly 2;

the pneumatic module 1 comprises a volute 11, a diffuser 12, a fluid director 13 and an impeller 14, wherein the volute 11 is arranged on the motor assembly 2 through a flange 15, the impeller 14 and the diffuser 12 are both arranged in the volute 11, the power output end of the motor assembly 2 penetrates through the flange 15 and the volute 11 to be in transmission connection with the impeller 14, an air inlet of the volute 11 is arranged at one end, far away from the motor assembly 2, of the volute 11, and the fluid director 13 is arranged at the air inlet.

When the centrifugal compressor with the structure is used, the air outlet of the pneumatic module 1 can be directly communicated with the air inlet of the equipment, so that the centrifugal compressor can provide compressed air for the equipment, and the equipment can normally run;

when centrifugal compressors with different powers need to be replaced, the pneumatic modules 1 with different sizes can be directly replaced, namely the pneumatic modules 1 with output compressed air flow and pressure meeting the requirement of equipment operation are selected, the selected pneumatic modules 1 are fixed with the motor assembly 2 through the flange 15, and then the impeller 14 is installed at the power output end of the motor assembly 2, so that the centrifugal compressor can output the compressed air required by the equipment operation.

The centrifugal compressor with the structure can convey compressed air with different flow rates and pressures only by replacing the pneumatic module 1, so that the requirement of equipment operation can be met without preparing a plurality of compressors with different models and models.

Preferably, the motor assembly 2 includes a fixed module 21 and a rotating shaft 22; wherein the content of the first and second substances,

the fixed module 21 comprises a shell 211, stators 212 and bearing seats 213, wherein the stators 212 are arranged inside the shell 211, the number of the bearing seats 213 is two, the two bearing seats 213 are respectively arranged at two ends of the shell 211, bearings are arranged on the bearing seats 213, a rotating shaft 22 passes through the stators 212 and is rotatably arranged on the bearing seats 213 through the bearings, and the end part of the rotating shaft 22 is in transmission connection with the impeller 14;

when the rotating shaft 22 of the motor assembly 2 rotates, the rotating shaft 22 drives the impeller 14 to rotate together, so that the centrifugal compressor can operate normally.

Specifically, the stator 212 in the fixed module 21 is disposed in the housing 211 through the potting process, so that the stator 212 has the insulating property, the two bearing seats 213 are then mounted at two ends of the housing 211, and the coaxiality and the verticality of the bearing seats 213 are processed through finish machining, so that the difficulty in production and manufacturing of the centrifugal compressor is reduced, and the production cost of the centrifugal compressor is effectively reduced.

Preferably, the bearing on the bearing seat 213 is a radial air foil bearing 3, which is a wedge effect generated by a wedge formed between the rotating shaft 22 and the bearing support surface; as the rotating speed of the rotating shaft 22 increases, due to the viscosity of the gas, the gas in the surrounding environment is dragged into the wedge, and when the rotating speed increases to a certain value, the gas pressure in the wedge increases to support the rotating shaft 22, so that the rotating shaft 22 is not in contact with other objects, and the abrasion of the rotating shaft 22 and the energy consumption of the centrifugal compressor during the operation process are reduced.

Example two:

as shown in fig. 1 to 5:

as a further optimization of the above embodiment, the volute casing 11 is provided with a mounting hole 111, the diameter of the air inlet is larger than that of the mounting hole 111, and the diameter of the mounting hole 111 is larger than that of the bearing seat 213;

the side of the flange 15 connected with the volute casing 11 is provided with a boss matched with the assembling hole 111, so that when the volute casing 11 is connected with the flange 15, the boss on the flange 15 can be embedded into the assembling hole 111 on the volute casing 11, so that the connection between the volute casing 11 and the flange 15 is more tight.

Preferably, the inner ring of the flange 15 is provided with an annular sealing member 4, the rotating shaft 22 passes through the sealing member 4 to be in transmission connection with the impeller 14, and the diameter of the sealing member 4 is larger than that of the bearing seat 213;

when the parts in the motor assembly 2 are damaged, a maintenance worker can sequentially take down the fluid director 13, the impeller 14 and the sealing element 4, then can take out the damaged parts such as the bearing seat 213, the bearing or the rotating shaft 22 and the like in the motor assembly 2, replace the damaged parts, and sequentially mount the sealing element 4, the impeller 14 and the fluid director 13 to finish the maintenance of the centrifugal compressor;

the centrifugal compressor with the structure can reduce the parts required to be disassembled in the maintenance process so as to reduce the maintenance difficulty of the centrifugal compressor, and therefore maintenance personnel can complete the maintenance of the centrifugal compressor on a working site.

Preferably, the rotating shaft 22 is provided with a thrust disc 5, and the thrust disc 5 is positioned between the sealing element 4 and the bearing seat 213; the thrust plate can balance the axial force generated by the impeller 14 during rotation, so that the operation of the centrifugal compressor is more stable.

Preferably, thrust air foil bearings 6 are arranged between the thrust disc 5 and the bearing seat 213 and between the thrust disc 5 and the sealing element 4, and the thrust air foil bearings 6 can reduce friction between the thrust disc 5 and the bearing seat 213 and between the thrust disc 5 and the sealing element 4, so that the centrifugal compressor operates more smoothly, and energy consumption of the centrifugal compressor in the working process is effectively reduced.

Preferably, the motor base 7 is arranged on the housing 211, and the centrifugal compressor is fixedly mounted on a station through the motor base 7, so that the centrifugal compressor is more stable in operation.

Preferably, the pneumatic module 1 comprises a first-stage compression part and a second-stage compression part; wherein the content of the first and second substances,

one-level compression portion and second grade compression portion set up respectively at motor element 2's both ends, and impeller 14 in one-level compression portion and the second grade compression portion fixes respectively at the both ends of pivot 22, make pivot 22 rotate two impeller 14 rotations at the rotation in-process, so that work that one-level compression portion and second grade compression portion can be normal, and thus effectual improvement this centrifugal compressor's work efficiency.

The air outlet of the first-stage compression part can be communicated with the air inlet of the second-stage compression part, so that the second-stage compression part can perform secondary compression on the compressed air output by the first-stage compression part, and the pressure of the air output by the centrifugal compressor is improved;

in addition, the air outlets of the first-stage compression part and the second-stage compression part can also be directly communicated with the air inlet of the equipment, so that the flow of compressed air output by the centrifugal compressor is improved, and the working efficiency of the centrifugal compressor is effectively improved.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A centrifugal compressor, characterized in that: comprises a pneumatic module (1) and a motor component (2);

pneumatic module (1) includes spiral case (11), diffuser (12), divertor (13) and impeller (14), spiral case (11) pass through flange (15) and set up on motor element (2), impeller (14) with diffuser (12) all set up in spiral case (11), just the power take off end of motor element (2) passes flange (15) with spiral case (11) with impeller (14) transmission is connected, the air intake setting of spiral case (11) is in spiral case (11) is kept away from the one end of motor element (2), divertor (13) set up air intake department.

2. The centrifugal compressor of claim 1, wherein: motor element (2) are including fixed module (21) and pivot (22), fixed module (21) are including casing (211), stator (212) and bearing frame (213), stator (212) set up in casing (211), the quantity of bearing frame (213) has two, two bearing frame (213) set up respectively the both ends of casing (211), pivot (22) are passed stator (212), just pivot (22) rotate to be set up on bearing frame (213), pivot (22) with impeller (14) transmission is connected.

3. The centrifugal compressor of claim 2, wherein: the stator (212) is disposed within the housing (211) by a potting process.

4. The centrifugal compressor of claim 3, wherein: the rotating shaft (22) is rotatably arranged on the bearing seat (213) through a radial air foil bearing (3).

5. The centrifugal compressor according to any one of claims 2 to 4, wherein: be provided with pilot hole (111) on spiral case (11), be provided with on flange (15) with the boss that pilot hole (111) match, spiral case (11) with flange (15) pass through pilot hole (111) with the cooperation zonulae occludens of boss.

6. The centrifugal compressor of claim 5, wherein: the inner ring of the flange (15) is provided with an annular sealing element (4), the rotating shaft (22) penetrates through the sealing element (4) to be in transmission connection with the impeller (14), the diameter of the air inlet is larger than that of the sealing element (4), and the diameter of the sealing element (4) is larger than that of the bearing seat (213).

7. The centrifugal compressor of claim 6, wherein: the rotating shaft (22) is provided with a thrust disc (5), and the thrust disc (5) is located between the sealing element (4) and the bearing seat (213).

8. The centrifugal compressor of claim 7, wherein: thrust air foil bearings (6) are arranged between the thrust disc (5) and the bearing seat (213) and between the thrust disc (5) and the sealing element (4).

9. The centrifugal compressor of claim 8, wherein: and a motor base (7) convenient for fixing the motor component (2) is arranged on the shell (211).

10. The centrifugal compressor of claim 1, wherein: the pneumatic module (1) comprises a first-stage compression part and a second-stage compression part, wherein the first-stage compression part and the second-stage compression part are respectively arranged at two ends of the motor component (2).