Fixing device for compressor impeller

Abstract

The utility model relates to the technical field of compressor impellers, in particular to a compressor impeller fixing device which comprises a driving part, the inner wall of the driving part is connected with the outer wall of a first locking part in a sliding mode, and after a main shaft is inserted into an inner cavity of an impeller body to enable a clamping cavity to be aligned with a clamping groove, a threaded column is screwed into a first threaded hole through threads. In the screwing-in process of a threaded column, a pushing cone at the bottom end makes contact with the inclined face of a clamping block, so that the threaded column descends along a first threaded hole and pushes the clamping block to move into a clamping groove in a clamping cavity at the same time, and the clamping block makes contact with the threaded column after being disengaged from making contact with the pushing cone; at the moment, a part of the clamping block enters the clamping groove to fix the impeller body and the main shaft, meanwhile, the locking column stretches into the locking groove from the sliding groove to be locked through the elastic force of the spring, the whole fixing process is completed in a thread screwing-in mode, operation is easy and fast, extra complex tools or steps are not needed, and people can use the impeller conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of compressor impellers, and specifically relates to a fixing device for a compressor impeller. Background Technique

[0002] Compressors, especially centrifugal compressors, are gas compression devices widely used in industry. One of its core components is the impeller, which rotates at high speed with the rotating shaft and compresses the gas by doing work on the gas through the blades. Therefore, the fixing device of the impeller is crucial for the performance and stability of the compressor.

[0003] At present, there are various fixing methods between most impellers and the compressor main shaft in the market, such as pin fixing, screw fixing, hot sleeve method, etc. Each fixing method has its specific operation steps and tool requirements, making the installation process relatively complex. Content of the Utility Model

[0004] The purpose of the utility model is to provide a fixing device for a compressor impeller to solve the problem that the installation process of fixing between the impeller and the compressor main shaft is relatively complex proposed in the above background technique. To achieve the above purpose, the utility model provides the following technical solution: A fixing device for a compressor impeller, including a driving member, the inner wall of the driving member is slidably connected to the outer wall of a first locking member, the inner bottom wall of the first locking member is fixedly connected to the bottom of a second locking member, the outer wall of the first locking member is movably abutted against the outer wall of the bottom end of a pushing member, the outer wall of the top end of the pushing member is threadedly connected to the inner wall of the driving member, the second locking member is composed of a sleeve, a spring and a locking post, and the pushing member includes a fixing block, a threaded post and a pushing cone.

[0005] The inner walls of the driving member and the pushing member are both threadedly connected to the outer wall of a reinforcing member, the outer wall of the driving member is movably inserted into the inner wall of an impeller member, the inner wall of the impeller member is movably abutted against the outer wall of the first locking member, and the inner wall of the impeller member is movably inserted into the outer wall of the second locking member.

[0006] Preferably, the driving member is composed of a main shaft, a clamping cavity, a first threaded hole and a second threaded hole. A clamping cavity is provided on the outer wall of the main shaft, and a first threaded hole is provided in the inner wall at the center of the top end of the main shaft, and a second threaded hole is provided in the inner wall away from the center at the top end of the main shaft.

[0007] Preferably, the first locking member includes two clamping blocks and sliding grooves. Sliding grooves are provided at the top and bottom of both clamping blocks, and the outer walls of both clamping blocks are slidably connected to the inner wall of the clamping cavity. The sides of both clamping blocks close to each other are both provided as inclined surfaces.

[0008] Preferably, the inner bottom wall of the sleeve is fixedly connected to the bottom end of the spring, and the top end of the spring is fixedly connected to the bottom end of the locking column, the outer wall of the locking column near the bottom end is slidably connected to the inner wall of the slide groove, and the bottom of the sleeve is fixedly connected to the inner bottom wall of the slide groove.

[0009] Preferably, the bottom of the fixed block is fixedly connected to the top of the threaded column, and the bottom end of the threaded column is fixedly connected to the top of the pushing cone, the outer wall of the top end of the threaded column is threadedly connected to the inner wall of the first threaded hole, and the outer wall of the bottom end of the threaded column is movably abutted against the outer wall of the locking block.

[0010] Preferably, the reinforcement member is composed of a toggle block and a threaded rod, the bottom of the toggle block is fixedly connected to the top of the threaded rod, and the outer wall of the threaded rod is threadedly connected to the fixed block and the inner wall of the second threaded hole respectively.

[0011] Preferably, the impeller component includes an impeller body, an inner cavity, a snap-fit ​​groove and a locking groove, the inner cavity is opened at the center of the impeller body, and snap-fit ​​grooves are opened on both sides of the inner cavity, locking grooves are opened at the top and bottom of the snap-fit ​​groove, and the inner wall of the inner cavity is movably connected with the outer wall of the main shaft, the inner wall of the snap-fit ​​groove is movably abutted with the outer wall of the snap-fit ​​block, and the inner wall of the locking groove is movably connected with the outer wall of the locking column.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] In the utility model, after the main shaft is inserted into the inner cavity of the impeller body so that the engaging cavity and the engaging groove are aligned, the threaded column is screwed into the first threaded hole through the thread. During the screwing-in process of the threaded column, the pushing cone at the bottom end contacts the inclined surface of the engaging block, so that the threaded column descends along the first threaded hole and pushes the engaging block to move into the engaging groove in the engaging cavity. After the engaging block is separated from the contact with the pushing cone, it will contact the threaded column. At this time, part of the engaging block enters the engaging groove to fix the impeller body and the main shaft. At the same time, the locking column is extended from the slide groove into the locking groove by the spring force to lock it. The entire fixing process is completed by screwing in the thread, and the operation is simple and quick. No additional complicated tools or steps are required, which is convenient for people to use.

[0014] In the utility model, through the cooperation between the snap block and the snap groove, the locking column and the locking groove, the threaded rod and the second threaded hole, and the threaded column and the first threaded hole, the multiple locking mechanisms provide additional safety guarantees, ensuring the stable operation of the main shaft and the impeller body under high-speed rotation or other harsh working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a cross-sectional view of the utility model;

[0017] Figure 3 It is an exploded view of the utility model;

[0018] Figure 4 An exploded view of the first locking member and the second locking member in the utility model;

[0019] Figure 5 It is a cross-sectional view of the impeller member in the utility model;

[0020] In the figure: 1. driving member; 101. main shaft; 102. engaging cavity; 103. first threaded hole; 104. second threaded hole; 2. first locking member; 201. engaging block; 202. slide groove; 3. second locking member; 301. sleeve; 302. spring; 303. locking column; 4. pushing member; 401. fixing block; 402. threaded column; 403. pushing cone; 5. reinforcing member; 501. toggle block; 502. threaded rod; 6. impeller member; 601. impeller body; 602. inner cavity; 603. engaging groove; 604. locking groove. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technical personnel in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figures 1 to 5 The utility model provides a technical solution: a fixing device for a compressor impeller, comprising a driving member 1, the inner wall of the driving member 1 is slidably connected to the outer wall of a first locking member 2, the inner bottom wall of the first locking member 2 is fixedly connected to the bottom of a second locking member 3, the outer wall of the first locking member 2 is movably abutted against the outer wall of the bottom end of a pushing member 4, the outer wall of the top end of the pushing member 4 is threadedly connected to the inner wall of the driving member 1, the second locking member 3 is composed of a sleeve 301, a spring 302 and a locking column 303, and the pushing member 4 includes a fixing block 401, a threaded column 402 and a pushing cone 403.

[0023] The inner walls of the driving member 1 and the pushing member 4 are both threadedly connected to the outer wall of the reinforcing member 5, the outer wall of the driving member 1 is movably plugged into the inner wall of the impeller member 6, the inner wall of the impeller member 6 is movably abutted against the outer wall of the first locking member 2, and the inner wall of the impeller member 6 is movably plugged into the outer wall of the second locking member 3.

[0024] In this embodiment, Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the driving member 1 is composed of a main shaft 101, a engaging cavity 102, a first threaded hole 103 and a second threaded hole 104. An engaging cavity 102 is provided on the outer wall of the main shaft 101, and a first threaded hole 103 is provided on the inner wall at the center of the top end of the main shaft 101, and a second threaded hole 104 is provided on the inner wall away from the center at the top end of the main shaft 101.

[0025] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 shown, the first locking member 2 includes two engaging blocks 201 and sliding grooves 202. Sliding grooves 202 are provided at the top and bottom of the two engaging blocks 201, and the outer walls of the two engaging blocks 201 are slidably connected to the inner wall of the engaging cavity 102. The sides of the two engaging blocks 201 close to each other are both beveled surfaces.

[0026] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 shown, the inner bottom wall of the sleeve 301 is fixedly connected to the bottom end of the spring 302, and the top end of the spring 302 is fixedly connected to the bottom end of the locking column 303. The outer wall of the locking column 303 near the bottom end is slidably connected to the inner wall of the sliding groove 202, and the bottom of the sleeve 301 is fixedly connected to the inner bottom wall of the sliding groove 202.

[0027] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 shown, the bottom of the fixed block 401 is fixedly connected to the top end of the threaded column 402, and the bottom end of the threaded column 402 is fixedly connected to the top of the pushing cone 403. The outer wall of the top end of the threaded column 402 is threadedly connected to the inner wall of the first threaded hole 103, and the outer wall of the bottom end of the threaded column 402 is movably abutted against the outer wall of the engaging block 201. When the threaded column 402 is screwed into the first threaded hole 103, during the screwing process of the threaded column 402, it contacts the bevel surface of the engaging block 201 through the pushing cone 403 at the bottom end, so that while the threaded column 402 descends along the first threaded hole 103, it pushes the engaging block 201 to move into the engaging groove 603 in the engaging cavity 102. After the engaging block 201 disengages from the contact with the pushing cone 403, it will contact the threaded column 402.

[0028] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the reinforcement 5 is composed of a toggle block 501 and a threaded rod 502, the bottom of the toggle block 501 is fixedly connected to the top of the threaded rod 502, and the outer wall of the threaded rod 502 is threadedly connected to the fixed block 401 and the inner wall of the second threaded hole 104 respectively.

[0029] In this embodiment, Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the impeller member 6 includes an impeller body 601, an inner cavity 602, a snap-fit ​​groove 603 and a locking groove 604. The inner cavity 602 is opened at the center of the impeller body 601, and snap-fit ​​grooves 603 are opened on both sides of the inner cavity 602. Locking grooves 604 are opened at the top and bottom of the snap-fit ​​groove 603. The inner wall of the inner cavity 602 is movably plugged into the outer wall of the main shaft 101, the inner wall of the snap-fit ​​groove 603 is movably abutted against the outer wall of the snap-fit ​​block 201, and the inner wall of the locking groove 604 is movably plugged into the outer wall of the locking column 303. Through the cooperation between the snap-fit ​​block 201 and the snap-fit ​​groove 603, the locking column 303 and the locking groove 604, the threaded rod 502 and the second threaded hole 104, and the threaded column 402 and the first threaded hole 103, the multiple locking mechanisms provide additional safety protection, ensuring the stable operation of the main shaft 101 and the impeller body 601 under high-speed rotation or other harsh working conditions.

[0030] The use method and advantages of the utility model: When the fixing device of the compressor impeller is working, the working process is as follows:

[0031] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, after the main shaft 101 is inserted into the inner cavity 602 of the impeller body 601 and the engaging cavity 102 is aligned with the engaging groove 603, the threaded post 402 is screwed into the first threaded hole 103 through threads. During the screwing process of the threaded post 402, the pushing cone 403 at the bottom contacts the inclined surface of the engaging block 201, causing the threaded post 402 to descend along the first threaded hole 103 while pushing the engaging block 201 to move into the engaging groove 603 within the engaging cavity 102. After the engaging block 201 disengages from the contact with the pushing cone 403, it will contact the threaded post 402. At this time, a part of the engaging block 201 enters the engaging groove 603 to fix the impeller body 601 and the main shaft 101. At the same time, the locking post 303 extends into the locking groove 604 from the sliding groove 202 under the elastic force of the spring 302 for locking. The entire fixing process is completed by screwing in the threads, with simple and fast operation, without the need for additional complex tools or steps, facilitating people's use. Through the cooperation between the engaging block 201 and the engaging groove 603, the locking post 303 and the locking groove 604, the threaded rod 502 and the second threaded hole 104, and the threaded post 402 and the first threaded hole 103, the multiple locking mechanisms provide additional safety guarantees, ensuring the stable operation of the main shaft 101 and the impeller body 601 under high-speed rotation or other harsh working conditions.

[0032] The above shows and describes the basic principles, main features and advantages of the present utility model. Technical staff in this industry should understand that the present utility model is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present utility model and do not limit the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A fixing device for a compressor impeller, comprising a driving member (1), characterized in that: The inner wall of the driving member (1) is slidably connected to the outer wall of the first locking member (2); the inner bottom wall of the first locking member (2) is fixedly connected to the bottom of the second locking member (3); the outer wall of the first locking member (2) is movably abutted against the outer wall of the bottom end of the pushing member (4); the outer wall of the top end of the pushing member (4) is threadedly connected to the inner wall of the driving member (1); the second locking member (3) is composed of a sleeve (301), a spring (302) and a locking column (303); and the pushing member (4) includes a fixing block (401), a threaded column (402) and a pushing cone (403); The inner walls of the driving member (1) and the pushing member (4) are both threadedly connected to the outer wall of the reinforcing member (5); the outer wall of the driving member (1) is movably plugged into the inner wall of the impeller member (6); the inner wall of the impeller member (6) is movably abutted against the outer wall of the first locking member (2); and the inner wall of the impeller member (6) is movably plugged into the outer wall of the second locking member (3).

2. A fixing device for a compressor impeller according to claim 1, characterized in that: The driving member (1) is composed of a main shaft (101), a locking cavity (102), a first threaded hole (103) and a second threaded hole (104); the outer wall of the main shaft (101) is provided with a locking cavity (102), and the inner wall at the center of the top end of the main shaft (101) is provided with a first threaded hole (103); and the inner wall at the top end of the main shaft (101) away from the center is provided with a second threaded hole (104).

3. A fixing device for a compressor impeller according to claim 2, characterized in that: The first locking member (2) comprises two engaging blocks (201) and a slide groove (202), the top and bottom of the two engaging blocks (201) are provided with a slide groove (202), the outer walls of the two engaging blocks (201) are slidably connected to the inner wall of the engaging cavity (102), and the sides of the two engaging blocks (201) close to each other are both arranged as inclined surfaces.

4. A fixing device for a compressor impeller according to claim 3, characterized in that: The inner bottom wall of the sleeve (301) is fixedly connected to the bottom end of the spring (302), and the top end of the spring (302) is fixedly connected to the bottom end of the locking column (303), the outer wall of the locking column (303) close to the bottom end is slidably connected to the inner wall of the slide groove (202), and the bottom of the sleeve (301) is fixedly connected to the inner bottom wall of the slide groove (202).

5. The fixing device for a compressor impeller according to claim 3, characterized in that: The bottom of the fixed block (401) is fixedly connected to the top of the threaded column (402), and the bottom end of the threaded column (402) is fixedly connected to the top of the pushing cone (403); the outer wall of the top end of the threaded column (402) is threadedly connected to the inner wall of the first threaded hole (103), and the outer wall of the bottom end of the threaded column (402) is movably abutted against the outer wall of the locking block (201).

6. A fixing device for a compressor impeller according to claim 5, characterized in that: The reinforcement member (5) is composed of a toggle block (501) and a threaded rod (502), the bottom of the toggle block (501) is fixedly connected to the top of the threaded rod (502), and the outer wall of the threaded rod (502) is threadedly connected to the inner wall of the fixed block (401) and the second threaded hole (104) respectively.

7. A fixing device for a compressor impeller according to claim 4, characterized in that: The impeller component (6) comprises an impeller body (601), an inner cavity (602), a snap-fit ​​groove (603) and a locking groove (604); the inner cavity (602) is provided at the center of the impeller body (601), and snap-fit ​​grooves (603) are provided on both sides of the inner cavity (602); locking grooves (604) are provided at the top and bottom of the snap-fit ​​groove (603); the inner wall of the inner cavity (602) is movably plugged with the outer wall of the main shaft (101); the inner wall of the snap-fit ​​groove (603) is movably abutted with the outer wall of the snap-fit ​​block (201); and the inner wall of the locking groove (604) is movably plugged with the outer wall of the locking column (303).

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