Locking device for centrifugal compressor impeller

Abstract

The locking device comprises the compressor impeller, a nut sleeve, a protection column and an installation column, the compressor impeller is fixedly installed on the outer arc face of the installation column, the nut sleeve is rotationally connected to the outer arc face of the protection column in a sleeved mode, and a connecting column is fixedly installed on the side, close to the nut sleeve, of the installation column. A locking assembly used for improving different locking forces is arranged in the protection column. The locking assembly comprises a connecting double column, the connecting double column is fixedly mounted at the end, away from the mounting column, of the connecting column, an auxiliary assembly used for auxiliary locking of the connecting column is arranged on the upper surface of the connecting double column, and by rotating a nut sleeve, the nut sleeve moves towards the connecting shaft along the protective column and moves towards the interior of the protective column by pushing a circular truncated cone sleeve. Therefore, the circular truncated cone sleeve is gradually clamped through the protective column, the connecting column is gradually locked through the clamping column, locking force of different magnitudes can be applied to the compressor impeller through a simple structure, and the compressor impeller can be conveniently and rapidly replaced.

Description

Technical Field

[0001] The utility model relates to the technical field of compressor impellers, in particular to a locking device for a centrifugal compressor impeller. Background Art

[0002] Centrifugal compressor is also called "vortex compressor", a type of compressor. The structure and operating principle are similar to those of centrifugal blowers, but they are always multi-stage, which can make the gas obtain higher pressure, larger processing capacity and higher efficiency. The turbine compressor with exhaust pressure higher than 0.015 MPa and gas mainly flowing radially is also called radial flow compressor. The impeller refers to the wheel with moving blades, which is a component of the impulse turbine rotor, and can also refer to the general term for the wheel and the rotating blades installed on it. The impeller is usually connected to the compressor with a locking device;

[0003] For example, the authorization announcement number: CN201377466Y discloses a locking device for a centrifugal compressor impeller, the impeller includes an impeller shaft and a locking nut threadedly connected to the impeller shaft. In particular, the locking device includes: a piston, one end of which is threadedly connected to the impeller shaft and opposite to the locking nut; a driving tool connected to the piston, driving the piston to move to stretch or release the impeller shaft, and a lever, cooperating with the locking nut, for tightening the locking nut when stretching the impeller shaft. The locking device for a centrifugal compressor impeller of the utility model uses a driving tool to stretch the impeller shaft and then tighten the locking nut, and uses the elastic deformation of the shaft to ensure that the expected preload force is achieved. Its operation process is simple and convenient, and the preload force is accurate.

[0004] The above patent still has some problems when in use. In actual use, although the patent can achieve locking forces of different sizes, it still has the defects of complex structure and inconvenient operation; therefore, we need to propose a locking device for the impeller of a centrifugal compressor. Utility Model Content

[0005] The purpose of the utility model is to provide a locking device for the impeller of a centrifugal compressor. By rotating the nut sleeve, the nut sleeve moves along the protective column toward the connecting shaft, and the nut sleeve pushes the conical sleeve to move inside the protective column, so that the conical sleeve is gradually clamped by the protective column, and then the connecting column is gradually locked by the clamping column. At the same time, the tightening bolt is gradually contacted with the connecting double columns by rotating, so as to auxiliary lock the connecting column to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a locking device for a centrifugal compressor impeller, comprising a compressor impeller, a nut sleeve, a protective column and a mounting column, wherein the compressor impeller is fixedly mounted on the outer arc surface of the mounting column, the nut sleeve is rotatably sleeved on the outer arc surface of the protective column, a connecting column is fixedly mounted on one side of the mounting column close to the nut sleeve, and a locking assembly for increasing different locking forces is arranged inside the protective column;

[0007] The locking assembly comprises a connecting double column, the connecting double column is fixedly mounted on one end of the connecting column away from the mounting column, and an auxiliary assembly for auxiliary locking of the connecting column is arranged on the upper surface of the connecting double column.

[0008] Preferably, the locking assembly also includes a truncated cone sleeve and a clamping column, wherein the clamping column is fixedly mounted on one end of the truncated cone sleeve close to the mounting column, a movable opening corresponding to the connecting column is formed through the side surface of the clamping column, and a plurality of groups of notches are formed on the outer arc surfaces of the truncated cone sleeve and the clamping column.

[0009] Preferably, a top column is fixedly installed on one side of the nut sleeve close to the mounting column, and a plug interface corresponding to the connecting column is opened through the side surface of the top column.

[0010] Preferably, an inner wall of the nut sleeve is provided with an internal thread, and an outer surface of the protective column is provided with an external thread corresponding to the internal thread.

[0011] Preferably, the auxiliary component includes a clamping bolt, the thread of which passes through the outer arc surface of the protective column, and the bottom surface of the clamping bolt contacts the upper surface of the connecting double columns.

[0012] Preferably, the truncated cone sleeve is slidably disposed inside the protective column, and the inner wall of the protective column is provided with a snap-in groove corresponding to the connection between the double columns.

[0013] Preferably, a connecting shaft is fixedly mounted on one end of the protective column away from the nut sleeve, and a coupling is key-connected to the other end of the connecting shaft.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model rotates the nut sleeve so that the nut sleeve moves along the protective column toward the connecting shaft, and the nut sleeve pushes the conical sleeve to move inside the protective column, thereby gradually clamping the conical sleeve through the protective column, and then gradually locking the connecting column through the clamping column, and at the same time gradually contacting the connecting double columns by rotating the tightening bolt, thereby auxiliary locking of the connecting column, and then applying different sizes of locking forces to the compressor impeller through a simple structure, thereby facilitating and quickly replacing the compressor impeller.

[0016] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by implementing the invention. The purpose and other advantages of the utility model can be realized and obtained by the structures indicated in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is an exploded view of the overall structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the auxiliary components of the utility model;

[0020] Figure 4 It is a front view of the locking assembly of the utility model.

[0021] In the figure: 1. compressor impeller; 2. nut sleeve; 3. protective column; 4. connecting shaft; 5. coupling; 6. tightening bolt; 7. mounting column; 8. top column; 9. plug-in interface; 10. internal thread; 11. connecting column; 12. frustum sleeve; 13. notch; 14. external thread; 15. connecting double column; 16. clamping column. DETAILED DESCRIPTION

[0022] 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 technicians in this field without creative work are within the scope of protection of the utility model.

[0023] The utility model provides: a locking device for a centrifugal compressor impeller, such as Figure 1-4 As shown, it includes a compressor impeller 1, a nut sleeve 2, a protective column 3 and a mounting column 7, the compressor impeller 1 is fixedly mounted on the outer arc surface of the mounting column 7, the nut sleeve 2 is rotatably sleeved on the outer arc surface of the protective column 3, a connecting column 11 is fixedly mounted on one side of the mounting column 7 close to the nut sleeve 2, and a locking component for increasing different locking forces is arranged inside the protective column 3;

[0024] The locking assembly includes a connecting double column 15, which is fixedly installed on one end of the connecting column 11 away from the mounting column 7. An auxiliary assembly for assisting the locking of the connecting column 11 is provided on the upper surface of the connecting double column 15. By fixing the compressor impeller 1 on the outer arc surface of the mounting column 7 and fixing the connecting column 11 to the mounting column 7, different locking forces are applied to the connecting column 11, that is, different locking forces are applied to the compressor impeller 1.

[0025] Preferably, the locking assembly also includes a conical sleeve 12 and a clamping column 16, and the clamping column 16 is fixedly installed at one end of the conical sleeve 12 close to the mounting column 7. A movable opening corresponding to the connecting column 11 is opened through the side of the clamping column 16, and a plurality of groups of notches 13 are opened on the outer arc surface of the conical sleeve 12 and the clamping column 16. The connecting column 11 and the connecting double column 15 are inserted into the conical sleeve 12 through the movable opening, and the notches 13 are arranged so that the conical sleeve 12 and the clamping column 16 can expand and reduce the diameter of the movable opening, and when the diameter of the movable opening is the largest, it is consistent with the diameter of the connecting column 11, thereby ensuring that the connecting column 11 can be inserted into the conical sleeve 12 along the movable opening.

[0026] It is worth mentioning that a top column 8 is fixedly installed on one side of the nut sleeve 2 near the mounting column 7, and a plug-in port 9 corresponding to the connecting column 11 is opened on the side of the top column 8, and the diameter of the plug-in port 9 is consistent with the diameter of the connecting column 11, thereby ensuring that the connecting column 11 is inserted into the nut sleeve 2 along the plug-in port 9, and enters the inside of the truncated cone sleeve 12 through the movable opening, and when the nut sleeve 2 moves along the outer arc surface of the protective column 3 close to the connecting shaft 4, the nut sleeve 2 will squeeze the truncated cone sleeve 12 through the top column 8, and the truncated cone sleeve 12 gradually enters the inside of the protective column 3, because the truncated cone sleeve 12 is set to be truncated cone-shaped, and the end located inside the protective column 3 is the end with a smaller diameter, and the diameter opened on the side of the protective column 3 is consistent with the middle diameter of the truncated cone sleeve 12, so that when the truncated cone sleeve 12 gradually enters the inside of the protective column 3, the truncated cone sleeve 12 will be gradually clamped by the protective column 3, thereby gradually clamping the clamping column 16, and then the clamping column 16 applies a gradually increasing locking force on the connecting column 11.

[0027] Furthermore, an internal thread 10 is provided on the inner wall of the nut sleeve 2, and an external thread 14 corresponding to the internal thread 10 is provided on the outer surface of the protective column 3. When the nut sleeve 2 is rotated, the internal internal thread 10 is connected to the external external thread 14 of the protective column 3, so that different locking forces can be applied to the connecting column 11 by rotating the nut sleeve 2, and after the connecting column 11 is locked, the nut sleeve 2 is fixed under the action of the internal thread 10 and the external thread 14, thereby avoiding a reduction in the locking force of the connecting column 11.

[0028] Furthermore, the auxiliary component includes a clamping bolt 6, the thread of which passes through the outer arc surface of the protective column 3, and the bottom surface of the clamping bolt 6 contacts the upper surface of the connecting double column 15. By rotating the clamping bolt 6, the clamping bolt 6 is inserted into the interior of the protective column 3 through the thread, and the clamping bolt 6 gradually contacts the connecting double column 15, thereby applying another set of locking force to the connecting double column 15 through the clamping bolt 6.

[0029] Specifically, the truncated cone sleeve 12 is slidably arranged inside the protective column 3, and the inner wall of the protective column 3 is provided with a snap-in groove corresponding to the connecting double column 15. When the connecting column 11 and the connecting double column 15 are inserted into the truncated cone sleeve 12, the end of the connecting double column 15 away from the connecting column 11 is snapped into the snap-in groove inside the protective column 3, thereby auxiliary fixing the connecting double column 15 and ensuring that the connecting double column 15 is always in a parallel state.

[0030] In addition, a connecting shaft 4 is fixedly installed on one end of the protective column 3 away from the nut sleeve 2, and a coupling 5 is keyed to the other end of the connecting shaft 4. The overall device is connected to the coupling 5 through the connecting shaft 4, and is keyed to the output shaft of the compressor through the coupling 5.

[0031] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A locking device for a centrifugal compressor impeller, characterized in that: The invention comprises: a compressor impeller (1), a nut sleeve (2), a protective column (3) and a mounting column (7), wherein the compressor impeller (1) is fixedly mounted on the outer arc surface of the mounting column (7), the nut sleeve (2) is rotatably sleeved on the outer arc surface of the protective column (3), a connecting column (11) is fixedly mounted on one side of the mounting column (7) close to the nut sleeve (2), and a locking component for increasing different locking forces is arranged inside the protective column (3); The locking assembly comprises a connecting double column (15), wherein the connecting double column (15) is fixedly mounted on one end of the connecting column (11) away from the mounting column (7), and an auxiliary assembly for assisting the locking of the connecting column (11) is arranged on the upper surface of the connecting double column (15).

2. A locking device for a centrifugal compressor impeller according to claim 1, characterized in that: The locking assembly also includes a truncated cone sleeve (12) and a clamping column (16), wherein the clamping column (16) is fixedly mounted on one end of the truncated cone sleeve (12) close to the mounting column (7), a movable opening corresponding to the connecting column (11) is formed through the side surface of the clamping column (16), and a plurality of groups of notches (13) are formed on the outer arc surfaces of the truncated cone sleeve (12) and the clamping column (16).

3. A locking device for a centrifugal compressor impeller according to claim 2, characterized in that: A top column (8) is fixedly mounted on one side of the nut sleeve (2) close to the mounting column (7), and a plug-in interface (9) corresponding to the connecting column (11) is provided through the side of the top column (8).

4. The locking device for a centrifugal compressor impeller according to claim 1, characterized in that: The inner wall of the nut sleeve (2) is provided with an internal thread (10), and the outer surface of the protective column (3) is provided with an external thread (14) corresponding to the internal thread (10).

5. The locking device for a centrifugal compressor impeller according to claim 1, characterized in that: The auxiliary component comprises a clamping bolt (6), the thread of which penetrates through the outer arc surface of the protective column (3), and the bottom surface of the clamping bolt (6) contacts the upper surface of the connecting double column (15).

6. The locking device for a centrifugal compressor impeller according to claim 2, characterized in that: The truncated cone sleeve (12) is slidably arranged inside the protection column (3), and the inner wall of the protection column (3) is provided with a clamping groove corresponding to the connecting double columns (15).

7. The locking device for a centrifugal compressor impeller according to claim 1, characterized in that: A connecting shaft (4) is fixedly mounted on one end of the protective column (3) away from the nut sleeve (2), and a coupling (5) is key-connected to the other end of the connecting shaft (4).

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