Impeller fixing device of centrifugal compressor

Abstract

The utility model relates to the technical field of machinery, in particular to a centrifugal compressor impeller fixing device which comprises an impeller and a fixing assembly, the fixing assembly comprises a first installation shaft, a first limiting piece, a connecting shaft, a second installation shaft, a second limiting piece and a connecting portion, the first installation shaft is fixedly connected with the impeller, the first limiting piece is fixedly connected with the first installation shaft, and the connecting portion is fixedly connected with the second installation shaft. The connecting shaft is fixedly connected with the first mounting shaft, the second mounting shaft is fixedly connected with the connecting shaft, the second limiting piece is fixedly connected with the second mounting shaft, the first limiting piece on the first mounting shaft is aligned to the corresponding position on the connecting part and slides downwards, and then the first mounting shaft is rotated; when the impeller is fixed, the second limiting piece on the second mounting shaft corresponds to the corresponding hole position in the connecting part, then the second limiting piece continues to slide downwards to mount and fix the second mounting shaft, through mounting and fixing of the first limiting piece and the second limiting piece, the stability of the impeller during fixing is guaranteed, and parameter errors are avoided after long-time use.

Description

Technical Field

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

[0002] Micro generator sets are of great significance in the field of hybrid electric vehicles and military equipment due to their compact structure, small size, light weight, good flexibility, and are not restricted by time, place, and environment. At present, the operating speed of micro generator sets can reach 60,000RPM or even higher. The compressor, its core component, usually shares the same rotor with the turbine and generator, that is, the compressor impeller is suspended on the motor rotor shaft. The compressor is required to have high reliability during operation and high efficiency. High-efficiency compressors also have stricter requirements on the flow channel design of the impeller inlet hub, hoping that the curvature of the inlet flow channel has a smooth transition. However, in order to better fix the impeller on the rotor shaft, the hub flow channel structure usually has to be changed, which will have a certain impact on the efficiency of the compressor.

[0003] The current prior art (CN214837350U) discloses a centrifugal compressor impeller fixing device including a locking screw, a hexagon socket bolt, an impeller and a motor rotor. The impeller is fixed to the motor rotor by the hexagon socket bolt. A threaded hole is opened at the front end of the hexagon socket bolt. The locking screw is fixed to the hexagon socket bolt through the threaded hole. The curvature of the outer contour surface of the hexagon socket bolt is continuously and smoothly transitioned to form a second impeller inlet hub flow channel. The curvature of the outer contour surface of the locking screw is continuously and smoothly transitioned. The outer contour surface of the hexagon socket bolt and the outer contour surface of the locking screw are smoothly connected to form a first impeller inlet hub flow channel. Through the impeller fixing device, the continuous and smooth transition structure of the impeller inlet curvature is retained, the aerodynamic performance of the impeller inlet is improved, and the efficiency of the compressor is improved.

[0004] However, the installation between the impeller and the motor rotor in the above solution is not stable, and long-term high-speed use may cause looseness. Utility Model Content

[0005] The utility model aims to provide a centrifugal compressor impeller fixing device, which can make the installation between the impeller and the motor rotor more stable and will not loosen even under long-term high-speed rotation.

[0006] To achieve the above-mentioned purpose, the utility model provides a centrifugal compressor impeller fixing device, including an impeller and a mounting seat, wherein the mounting seat is fixedly connected to the impeller and is located on one side of the impeller, and further includes a fixing assembly; the fixing assembly includes a first mounting shaft, a first stopper, a connecting shaft, a second mounting shaft, a second stopper and a connecting portion; the second mounting shaft is fixedly connected to the impeller and is located on one side of the impeller, the second stopper is fixedly connected to the second mounting shaft and is located on one side of the second mounting shaft, the connecting shaft is fixedly connected to the second mounting shaft and is located on one side of the second mounting shaft, the first mounting shaft is fixedly connected to the connecting shaft and is located on one side of the connecting shaft, the first stopper is fixedly connected to the first mounting shaft and is located on one side of the first mounting shaft. The connecting portion is located on one side of the impeller.

[0007] Wherein, the connecting part includes a first mounting seat, a fixed seat, and a second mounting seat, the first mounting seat is slidably connected to the first mounting shaft and is located on one side of the first mounting shaft, the first mounting seat has the first limiting groove, the first limiting groove is located on one side of the first mounting seat, the fixed seat is fixedly connected to the first mounting seat and is located on one side of the first mounting seat, the second mounting seat is fixedly connected to the fixed seat and is located on one side of the fixed seat, the second mounting seat has the second limiting groove, and the second limiting groove is located on one side of the second mounting seat.

[0008] Wherein, the fixing assembly further comprises a scale, and the scale is fixedly connected to the second mounting seat and is located on one side of the second mounting seat.

[0009] Wherein, the fixing assembly also includes a fixing rod and a fixing bolt, the fixing rod is slidably connected to the impeller and is located on one side of the impeller, and the fixing bolt is threadedly connected to the fixing rod and is located on one side of the fixing rod.

[0010] Wherein, the centrifugal compressor impeller fixing device also includes a mounting assembly, and the mounting assembly is arranged on one side of the second mounting seat.

[0011] Wherein, the mounting assembly includes a fixing part and an assembly part, wherein the fixing part is fixedly connected to the impeller and is located on one side of the impeller, and the assembly part is fixedly connected to the first mounting seat and is located on one side of the first mounting seat.

[0012] The utility model discloses a centrifugal compressor impeller fixing device. The first limiting piece on the first mounting shaft is aligned with the corresponding position on the connecting part, and the impeller slides downward. The first mounting shaft is rotated when it slides to the connecting shaft position. The second limiting piece on the second mounting shaft is also aligned with the corresponding hole position on the connecting part. After the rotation, the first limiting piece will be synchronously aligned with other hole positions, and then the impeller continues to slide downward to be installed and fixed. The installation and fixation of the first limiting piece and the second limiting piece ensures the stability of the impeller when it is fixed, and there will be no parameter error even after long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0014] Figure 1 It is a schematic diagram of the overall structure of the first embodiment of the utility model.

[0015] Figure 2 It is a schematic structural diagram of the first embodiment of the utility model from another angle.

[0016] Figure 3 It is a structural schematic diagram of the first mounting seat, the fixing seat, the second mounting seat, the first limiting groove, the second limiting groove and the scale of the first embodiment of the utility model.

[0017] Figure 4 It is a schematic diagram of the overall structure of the second embodiment of the utility model.

[0018] 101-impeller, 102-fixing assembly, 103-first mounting shaft, 104-first limiting member, 105-connecting shaft, 106-second mounting shaft, 107-second limiting member, 108-connecting part, 109-first mounting seat, 110-fixing seat, 111-second mounting seat, 112-first limiting groove, 113-second limiting groove, 114-scale, 115-fixing rod, 116-fixing bolt, 201-mounting assembly, 202-fixing member, 203 assembly. DETAILED DESCRIPTION

[0019] The first embodiment of the present application is:

[0020] See also Figure 1-Figure 3 ,in, Figure 1 It is a schematic diagram of the overall structure of the first embodiment of the utility model. Figure 2 This is a schematic structural diagram of the first embodiment of the utility model from another angle. Figure 3It is a structural schematic diagram of the first mounting seat, the fixing seat, the second mounting seat, the first limiting groove, the second limiting groove and the scale of the first embodiment of the utility model.

[0021] The utility model provides a centrifugal compressor impeller fixing device, including an impeller 101 and a fixing assembly 102, the fixing assembly 102 includes a first mounting shaft 103, a first limiting piece 104, a connecting shaft 105, a second mounting shaft 106, a second limiting piece 107, a connecting portion 108, a scale 114, a fixing rod 115 and a fixing bolt 116, the connecting portion 108 includes a first mounting seat 109, a fixing seat 110, and a second mounting seat 111, and the first limiting groove 112 and the second limiting groove 113 solve the problem that the installation between the impeller 101 and the motor rotor is not stable through the above-mentioned solution, and long-term use will cause errors and thus affect processing.

[0022] With respect to this specific embodiment, the gas rotates at high speed with the impeller 101 under the action of the blades of the impeller 101, and the gas is subjected to the centrifugal force of the rotation and the expansion pressure flow in the impeller 101, so that the pressure after passing through the impeller 101 is increased. The specific structure and use method of the impeller 101 are recorded in the patent document with publication number CN214837350U, which is not within the scope of protection of this application and will not be described in detail here.

[0023] The second mounting shaft 106 is fixedly connected to the impeller 101 and is located on one side of the impeller 101. The second stopper 107 is fixedly connected to the second mounting shaft 106 and is located on one side of the second mounting shaft 106. The connecting shaft 105 is fixedly connected to the second mounting shaft 106 and is located on one side of the second mounting shaft 106. The first mounting shaft 103 is fixedly connected to the connecting shaft 105 and is located on one side of the connecting shaft 105. The first stopper 104 is fixedly connected to the first mounting shaft 103 and is located on one side of the first mounting shaft 103. The connecting portion 108 is located on the impeller 101. On one side, align the first limiting member 104 on the first mounting shaft 103 with the corresponding position on the connecting portion 108, slide downward, slide to the position of the connecting shaft 105, and rotate the first mounting shaft 103, and also align the second limiting member 107 on the second mounting shaft 106 with the corresponding hole position on the connecting portion 108. After rotation, the first limiting member 104 will be aligned with other hole positions, and then continue to slide downward to install and fix it. Through the installation and fixation of the first limiting member 104 and the second limiting member 107, the stability of the impeller 101 during fixation is guaranteed, and there will be no parameter error after long-term use.

[0024] Secondly, the first mounting seat 109 is slidably connected to the first mounting shaft 103 and is located on one side of the first mounting shaft 103. The first mounting seat 109 has the first limiting groove 112, and the first limiting groove 112 is located on one side of the first mounting seat 109. The fixing seat 110 is fixedly connected to the first mounting seat 109 and is located on one side of the first mounting seat 109. The second mounting seat 111 is fixedly connected to the fixing seat 110 and is located on one side of the fixing seat 110. The second mounting seat 111 has a second limiting groove 113, and the second limiting groove 113 is located on one side of the second mounting seat 111. When the first mounting shaft 103 is inserted into the second mounting seat 111, the first limiting member 104 is aligned with the second limiting groove 113 and slides , continue to slide downward when the second limiting member 107 is against the second mounting seat 111, and the whole is rotated, the first limiting member 104 will rotate at the position of the fixing seat 110, and the second limiting member 107 will be aligned with the second limiting groove 113. At the same time, the first limiting member 104 will also be aligned with the first limiting groove 112 due to the rotation, and then continue to slide downward to make the first limiting member 104 inserted into the first limiting groove 112 of the first mounting seat 109, and the second limiting member 107 is inserted into the second limiting groove 113 of the second mounting seat 111, thereby strengthening the connection relationship between the first mounting axis 103 and the second mounting axis 106 and the first mounting seat 109 and the second mounting seat 111, and effectively avoiding the instability of the connecting part 108 caused by long-term use.

[0025] At the same time, the scale 114 is fixedly connected to the second mounting seat 111 and is located on one side of the second mounting seat 111. During the rotational installation process, the surface of the second mounting seat 111 has a scale 114. When the first limiting member 104 passes through the second limiting groove 113 to reach the fixed seat 110, the first limiting member 104 can be effectively and accurately inserted into the first limiting groove 112 by rotating according to the scale 114.

[0026] In addition, the fixing rod 115 is slidably connected to the impeller 101 and is located on one side of the impeller 101. The fixing bolt 116 is threadedly connected to the fixing rod 115 and is located on one side of the fixing rod 115. While fixing the first mounting shaft 103 and the second mounting shaft 106, the fixing rod 115 passes through the impeller 101, and then the fixing bolt 116 and the fixing rod 115 are threadedly tightened to fix the impeller 101 and the second mounting shaft 106 to be firmly fixed together to form a whole. The impeller 101 can be driven to rotate only by the motor rotor driving the first mounting seat 109 to rotate, thereby ensuring that the connection relationship will not affect the operation of the motor rotor.

[0027] When using the utility model, when the first mounting shaft 103 is inserted into the second mounting seat 111, the first limiting member 104 is aligned with the second limiting groove 113 to slide, and the sliding downward is continued. When the second limiting member 107 is against the second mounting seat 111, the whole is rotated, and the first limiting member 104 is rotated at the position of the fixing seat 110, and the second limiting member 107 is aligned with the second limiting groove 113. At the same time, the first limiting member 104 is also aligned with the first limiting groove 112 due to the rotation, and then continues to slide downward. Slide downward to insert the first limiting member 104 into the first limiting groove 112 of the first mounting seat 109, and the second limiting member 107 into the second limiting groove 113 of the second mounting seat 111, thereby strengthening the connection relationship between the first mounting shaft 103 and the second mounting shaft 106 and the first mounting seat 109 and the second mounting seat 111. At the same time, the fixing bolt 116 is matched with the fixing rod 115 to lock the impeller 101 therewith, thereby effectively avoiding the instability of the connecting part 108 caused by long-term use.

[0028] The second embodiment of the present application is:

[0029] Based on the first embodiment, please refer to Figure 4 ,in, Figure 4 It is an overall structural schematic diagram of the second embodiment of the utility model. The centrifugal compressor impeller fixing device provided by the utility model also includes a mounting assembly 201, and the mounting assembly 201 includes a fixing part 202 and an assembly part 203.

[0030] According to this specific embodiment, the fixing member 202 is fixedly connected to the impeller 101 and is located on one side of the impeller 101. The assembly 203 is fixedly connected to the second mounting seat 111 and is located on one side of the second mounting seat 111. The fixing member 202 is inserted into the assembly 203, and the connection between the impeller 101 and the second mounting seat 111 is reinforced by the cooperation of multiple teeth and grooves.

[0031] When using the utility model, when the first mounting shaft 103 is inserted into the second mounting seat 111, the first limiting member 104 is aligned with the second limiting groove 113 to slide, and the sliding downward is continued. When the second limiting member 107 is against the second mounting seat 111, the whole is rotated, and the first limiting member 104 is rotated at the position of the fixing seat 110, and the second limiting member 107 is aligned with the second limiting groove 113. At the same time, the first limiting member 104 is also aligned with the first limiting groove 112 due to the rotation, and then the first limiting member 104 is inserted into the fixing seat 110. The first limiting member 107 is inserted into the first limiting groove 112 of the first mounting seat 109, and the second limiting member 107 is inserted into the second limiting groove 113 of the second mounting seat 111, thereby strengthening the connection relationship between the first mounting shaft 103 and the second mounting shaft 106 and the first mounting seat 109 and the second mounting seat 111. At the same time, the fixing member 202 is connected and matched with the combination, reinforced by a plurality of teeth, and then the fixing bolt 116 is matched with the fixing rod 115 to lock the impeller 101 with the combination, thereby effectively avoiding the instability of the connecting portion 108 caused by long-term use.

[0032] What is disclosed above is only one or more preferred embodiments of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiments and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A centrifugal compressor impeller fixing device, comprising an impeller, characterized in that: Also included are fixing components; The fixing assembly includes a first installation shaft, a first stopper, a connecting shaft, a second installation shaft, a second stopper and a connecting portion; The second mounting shaft is fixedly connected to the impeller and is located on one side of the impeller, the second limiting member is fixedly connected to the second mounting shaft and is located on one side of the second mounting shaft, the connecting shaft is fixedly connected to the second mounting shaft and is located on one side of the second mounting shaft, the first mounting shaft is fixedly connected to the connecting shaft and is located on one side of the connecting shaft, the first limiting member is fixedly connected to the first mounting shaft and is located on one side of the first mounting shaft, and the connecting portion is located on one side of the impeller.

2. A centrifugal compressor impeller fixing device as claimed in claim 1, characterized in that: The connecting portion includes a first mounting seat, a fixed seat, and a second mounting seat, the first mounting seat is slidably connected to the first mounting shaft and is located on one side of the first mounting shaft, the first mounting seat has a first limiting groove, the first limiting groove is located on one side of the first mounting seat, the fixed seat is fixedly connected to the first mounting seat and is located on one side of the first mounting seat, the second mounting seat is fixedly connected to the fixed seat and is located on one side of the fixed seat, the second mounting seat has a second limiting groove, and the second limiting groove is located on one side of the second mounting seat.

3. A centrifugal compressor impeller fixing device as claimed in claim 2, characterized in that: The fixing assembly also includes a scale, which is fixedly connected to the second mounting seat and is located on one side of the second mounting seat.

4. A centrifugal compressor impeller fixing device as claimed in claim 3, characterized in that: The fixing assembly also includes a fixing rod and a fixing bolt. The fixing rod is slidably connected to the impeller and is located on one side of the impeller. The fixing bolt is threadedly connected to the fixing rod and is located on one side of the fixing rod.

5. A centrifugal compressor impeller fixing device as claimed in claim 4, characterized in that: The centrifugal compressor impeller fixing device also includes a mounting assembly, and the mounting assembly is arranged on one side of the second mounting seat.

6. A centrifugal compressor impeller fixing device as claimed in claim 5, characterized in that: The mounting assembly includes a fixing member and an assembly member, wherein the fixing member is fixedly connected to the impeller and is located at one side of the impeller, and the assembly member is fixedly connected to the second mounting seat and is located at one side of the second mounting seat.

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