Centrifugal vibration testing device of centrifugal compressor and testing method thereof

Abstract

The invention provides a centrifugal vibration testing device of a centrifugal compressor and a testing method thereof.The centrifugal vibration testing device comprises a base, a testing bin, a testing frame, a closed push plate and a closed movable plate, two vertical plates are fixedly connected to the top of the base, a transverse frame is fixedly connected between the two vertical plates, the testing bin is movably installed on the transverse frame, and two transverse rod frames are arranged on the front face of the base; a rotating rod is rotationally connected between the two cross rod frames, the testing frame is installed on the rotating rod, and an installation head is arranged at the end, away from the rotating rod, of the testing frame. According to the scheme provided by the invention, the test bin and the test frame are arranged, so that the impeller and the shaft rod structure of the centrifugal compressor can be subjected to closed test in the test bin, and the whole impeller and the shaft rod structure thereof simulate the actual working condition environment of the corresponding centrifugal compressor in the test process and are more close to the actual use state; and the data accuracy of the centrifugal vibration test is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of centrifugal vibration testing, and in particular relates to a centrifugal vibration testing device and a testing method for a centrifugal compressor. Background Art

[0002] A centrifugal compressor is a device that converts mechanical energy into gas pressure energy. It is a type of turbine compressor. Its working principle is to perform work on the gas through a high-speed rotating impeller, using centrifugal force to compress the gas, increasing its pressure and kinetic energy. Subsequently, in the diffuser flow channel, this part of the kinetic energy is converted into static pressure energy, further promoting the increase in gas pressure.

[0003] Before assembly, centrifugal compressors require a centrifugal vibration test on their impellers. Currently, the impeller is typically installed between the drive devices, then rotated, with sensors placed around it to test the impeller's centrifugal vibration. However, traditional vibration testing is performed in a fully open environment, which does not completely mimic the closed environment of a centrifugal compressor. Therefore, the vibration test process cannot accurately reflect the impact of the structure inside the centrifugal compressor on centrifugal vibration, resulting in certain limitations in the test results. For example, in the utility model patent with announcement number CN216617966U, the spindle speed is only indirectly detected by simulating the speed dial, without simulating the closed working conditions of the compressor, and cannot reflect the airflow and vibration coupling effect under actual working conditions.

[0004] However, the invention patent with publication number CN110374891A does not involve a vibration test function and cannot be used to evaluate the centrifugal vibration performance of the impeller. Furthermore, the invention patent with publication number CN103267024A pertains to in-service fault suppression technology and does not involve non-pre-production testing. While the invention patent CN105715531A involves testing, it does not simulate the test environment of a closed compression chamber, and its functionality is rudimentary, resulting in low data reliability.

[0005] Based on the defects of the above-mentioned prior art, there is an urgent need to develop a centrifugal vibration testing device and a testing method for a centrifugal compressor. Summary of the Invention

[0006] In view of the defects in the prior art, an object of the present invention is to provide a centrifugal vibration testing device and a testing method for a centrifugal compressor.

[0007] According to the present invention, a centrifugal vibration test device for a centrifugal compressor includes: a base 1, a test chamber 4, a test frame 7, a closing push plate 11, and a closing movable plate 13;

[0008] Two vertical plates 2 are connected to the top of the base 1, a horizontal frame 3 is connected between the two vertical plates 2, and a test chamber 4 is installed on the horizontal frame 3;

[0009] The front of the base 1 is provided with two crossbar frames 5, a rotating rod 6 is connected between the two crossbar frames 5, a test frame 7 is mounted on the rotating rod 6, and a mounting head 8 is provided at one end of the test frame 7 away from the rotating rod 6, and a closing push plate 11 is mounted on the outside of the test frame 7;

[0010] The outer side of the vertical plate 2 is connected to a side block 12 , and the closing movable plate 13 penetrates the side block 12 and is slidably connected thereto.

[0011] Preferably, a rack 14 is provided on the inner side of the closing movable plate 13, the rack 14 is meshed and connected with the driving gear 15, and the closing gear 18 is meshed and connected with the driving gear 15;

[0012] The two closing gears 18 are connected to a connecting rod 17 on opposite sides, and a closing pressure plate 19 is connected to the outside of the connecting rod 17. A movable baffle 20 is connected to the front end of the closing movable plate 13. A rod column 16 is connected to the middle position of the back side of the base 1. The end of the connecting rod 17 away from the closing gear 18 is rotatably connected to the rod column 16.

[0013] Preferably, a push plate seat 9 is provided on the outer side of the test frame 7, a movable frame 10 is installed on the outer side of the push plate seat 9, a closing push plate 11 is slidably installed on the movable frame 10, an electromagnetic lock 30 is connected to the side of the push plate seat 9 close to the movable frame 10, and a No. 1 spring 31 is connected between the side of the closing push plate 11 away from the push plate seat 9 and the inner side of the movable frame 10.

[0014] Preferably, the inner groove of the test chamber 4 is connected to a test slot core 21, and a vibration sensor 22 is installed on the inner groove wall of the test slot core 21. Both ends of the test chamber 4 are connected to rollers 23. A guide groove 24 is opened on the side of the vertical plate 2 opposite to the roller 23. The roller 23 is adapted to and slidably connected to the guide groove 24. The side of the horizontal frame 3 close to the test chamber 4 is connected to a rotating ring 25. The rotating ring 25 passes through and is slidably connected to the test chamber 4.

[0015] Preferably, the side of the mounting head 8 away from the test frame 7 is bolted to a limiting arc plate 26, one of the mounting heads 8 is bolted to a No. 1 motor 27 on the outer side, a bearing is installed inside the mounting head 8, the output end of the No. 1 motor 27 passes through the side wall of the mounting head 8 and is connected to the shaft rod relative to the bearing, one of the cross bar frames 5 is connected to a No. 2 motor 28 on the outer side, the output end of the No. 2 motor 28 passes through the cross bar frame 5 and is connected to the end of the rotating rod 6, and a stop block 29 is connected to the edge of one side of the top of the base 1 close to the test frame 7.

[0016] Preferably, the movable baffle 20 is connected to a limiting rod 32 at an upper position near one side of the closed movable plate 13, and the outer wall of the vertical plate 2 on one side opposite to the limiting rod 32 is connected to a limiting block 33. The limiting rod 32 and the limiting block 33 are penetrated and slidably connected, and a No. 2 spring 34 is connected between the limiting rod 32 and the limiting block 33.

[0017] Preferably, the top and bottom of the closed movable panel 13 are connected with limit bars 35 , and the limit bars 35 penetrate the side blocks 12 and are slidably connected thereto.

[0018] Preferably, the end of the closing pressure plate 19 away from the connecting rod 17 is rotatably connected to a pressure wheel 36 , and the pressure wheel 36 rotates to squeeze the test chamber 4 so that the closing pressure plate 19 can push the test chamber 4 to close.

[0019] Preferably, a winding box 37 is connected to the side of the horizontal frame 3 away from the test chamber 4, and a pull belt 38 is connected to the top and bottom of the winding box 37, and the outer end of the pull belt 38 is connected to the outer arc wall of the test chamber 4;

[0020] The inner groove of the winding box 37 is rotatably connected to a winding disk 39 , a pull belt 38 is fixed to the winding disk 39 and wound in connection, and rebound torsion springs 40 are provided at both ends of the winding disk 39 .

[0021] According to the present invention, a method for testing a centrifugal compressor using the centrifugal vibration testing device includes the following steps:

[0022] Step 1: During the test, the shaft core impeller of the centrifugal compressor is moved between the two test frames 7, and then the two ends of the shaft core impeller are respectively installed on the inner side of the mounting head 8. Subsequently, the test frame 7 with the shaft core impeller of the centrifugal compressor installed is driven by the rotating rod 6 to rotate upward on the inner side of the crossbar frame 5;

[0023] Step 2: As the test frame 7 rotates and lifts upward, the closing push plate 11 is lifted and then contacts the movable baffle 20. The closing push plate 11 pushes the movable baffle 20, and the movable baffle 20 drives the closing movable plate 13 to slide inside the side block 12 toward the back of the base 1. The rack 14 inside the closing movable plate 13 drives the driving gear 15 to rotate, and the driving gear 15 drives the closing gear 18 to rotate;

[0024] Step 3: The closing gear 18 drives the connecting rod 17 to rotate, and the connecting rod 17 drives the closing pressure plate 19 to move toward the test chamber 4. At this time, the upper and lower test chambers 4 can be pushed to rotate and close on the horizontal frame 3 through the closing pressure plate 19. When the test chamber 4 rotates and closes, the test frame 7 has rotated to the corresponding position. The closing of the test chamber 4 can close and wrap the shaft core impeller of the centrifugal compressor, and then the shaft core impeller rotates inside the test chamber 4 to perform a centrifugal vibration test.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. By setting up a test chamber and a test frame, the impeller and shaft structure of the centrifugal compressor can be tested in a closed environment inside the test chamber. During the test, the entire impeller and shaft structure simulate the actual working conditions of the corresponding centrifugal compressor, which improves the accuracy of the centrifugal vibration test data by being closer to the actual use state;

[0027] 2. The impeller and shaft structure of the centrifugal compressor are installed at the mounting head position of the test frame, and are lifted by rotation. Then, the closing push plate pushes the closing movable plate to move. The closing movable plate drives the meshing driving gear to rotate by the rack, and the driving gear drives the closing gear to rotate. At this time, the closing gear drives the closing pressure plate to squeeze the test chamber by the connecting rod, so that the test chamber can be automatically closed. The closed test chamber can close and wrap the impeller and shaft structure of the centrifugal compressor, and then simulate the actual working environment of the centrifugal compressor for testing. In this process, no lifting equipment is needed, and the loading and use of the test structure can be easily completed, making the centrifugal vibration test device of the centrifugal compressor more convenient and efficient to use;

[0028] 3. After the vibration test is completed, just move the closing push plate outward from the side wall of the test frame. At this time, the closed movable plate is reset without obstruction. At this time, the rack drives the driving gear and the closing gear to reverse, and the closing pressure plate can release the downward pressure on the test chamber. Then the test chamber is opened, and then the test frame can be reversed and reset, which can drive the impeller to move out of the test chamber, making it convenient for test discharging. This makes the entire centrifugal vibration test device convenient to use and the test continuity stronger. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Other features, objects and advantages of the present invention will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0030] Figure 1 It is a front structural schematic diagram of the centrifugal vibration testing device for a centrifugal compressor of the present invention;

[0031] Figure 2 It is a schematic diagram of the back structure of the centrifugal vibration testing device for a centrifugal compressor of the present invention;

[0032] Figure 3 It is a structural schematic diagram of the closed movable plate and the closed pressure plate of the present invention;

[0033] Figure 4 This is a schematic structural diagram of a closed movable panel of the present invention;

[0034] Figure 5 It is a structural schematic diagram of the test stand and the closed push plate of the present invention;

[0035] Figure 6 This is a schematic structural diagram of the test chamber of the present invention;

[0036] Figure 7 It is a structural schematic diagram of the vertical plate and the horizontal frame of the present invention;

[0037] Figure 8 This is a schematic diagram of the back structure of the vertical plate and the test chamber of the present invention;

[0038] Figure 9 It is a schematic cross-sectional structural diagram of the winding box of the present invention.

[0039] The figure shows:

[0040] DETAILED DESCRIPTION

[0041] The present invention will be described in detail below with reference to specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those skilled in the art, several changes and improvements can be made without departing from the scope of the present invention. These all fall within the scope of protection of the present invention.

[0042] See also Figures 1 to 9 The centrifugal vibration test device of the centrifugal compressor includes: a base 1, a test chamber 4, a test frame 7, a closing push plate 11 and a closing movable plate 13; two vertical plates 2 are fixedly connected to the top of the base 1, a horizontal frame 3 is fixedly connected between the two vertical plates 2, and the test chamber 4 is movably installed on the horizontal frame 3; two horizontal bar frames 5 are provided on the front of the base 1, a rotating rod 6 is rotatably connected between the two horizontal bar frames 5, the test frame 7 is installed on the rotating rod 6, and a mounting head 8 is provided at the end of the test frame 7 away from the rotating rod 6, and the closing push plate 11 is movably installed on the outside of the test frame 7; a side block 12 is fixedly connected to the outer side of the vertical plate 2, and the closing movable plate 13 penetrates and is slidably connected to the side block 12.

[0043] A rack 14 is provided on the inner side of the closing movable plate 13, the rack 14 is meshed with the driving gear 15, and the closing gear 18 is meshed with the driving gear 15; the two closing gears 18 are fixedly connected to the opposite sides with a connecting rod 17, and the outer side of the connecting rod 17 is fixedly connected to a closing pressure plate 19, and one end of the front side of the closing movable plate 13 is fixedly connected to a movable baffle 20, and a rod column 16 is fixedly connected to the middle position of the back side of the base 1, and the end of the connecting rod 17 away from the closing gear 18 is rotatably connected to the rod column 16.

[0044] Specifically, a push plate seat 9 is provided on the outer side of the test frame 7, a movable frame 10 is installed on the outer side of the push plate seat 9, a closing push plate 11 is slidably installed on the movable frame 10, an electromagnetic lock 30 is fixedly connected to the side of the push plate seat 9 close to the movable frame 10, and a No. 1 spring 31 is fixedly connected between the side of the closing push plate 11 away from the push plate seat 9 and the inner side of the movable frame 10.

[0045] Specifically, the inner groove of the test chamber 4 is fixedly connected to the test slot core 21 by bolts, and a vibration sensor 22 is installed on the inner groove wall of the test slot core 21. Rollers 23 are fixedly connected at both ends of the test chamber 4. A guide groove 24 is opened on the side of the vertical plate 2 opposite to the roller 23. The roller 23 is adapted to the guide groove 24 and is slidably connected. A rotating ring 25 is fixedly connected to the side of the horizontal frame 3 close to the test chamber 4. The rotating ring 25 passes through the test chamber 4 and is slidably connected.

[0046] Specifically, the side of the mounting head 8 away from the test frame 7 is bolted to the limiting arc plate 26, one of the mounting heads 8 is bolted to the outer side of the No. 1 motor 27, a bearing is installed inside the mounting head 8, the output end of the No. 1 motor 27 passes through the side wall of the mounting head 8 and is fixedly connected to the shaft rod relative to the bearing, one of the cross bar frames 5 is fixedly connected to the outer side of the No. 2 motor 28, the output end of the No. 2 motor 28 passes through the cross bar frame 5 and is fixedly connected to the end of the rotating rod 6, and a stop block 29 is fixedly connected to the edge of one side of the top of the base 1 close to the test frame 7.

[0047] Specifically, the movable baffle 20 is fixedly connected to a limiting rod 32 at an upper position near one side of the closed movable plate 13, and the outer wall of the vertical plate 2 on one side opposite to the limiting rod 32 is fixedly connected to a limiting block 33. The limiting rod 32 and the limiting block 33 are penetrated and slidably connected, and a No. 2 spring 34 is fixedly connected between the limiting rod 32 and the limiting block 33.

[0048] Specifically, the top and bottom of the closed movable panel 13 are fixedly connected to the limit bars 35 , and the limit bars 35 penetrate the side blocks 12 and are slidably connected thereto.

[0049] Specifically, the end of the closing pressure plate 19 away from the connecting rod 17 is rotatably connected to a pressure roller 36. A winding box 37 is fixedly connected to the side of the horizontal frame 3 away from the testing chamber 4. Drawstrings 38 extend through the top and bottom of the winding box 37, and the outer end of the drawstrings 38 is fixedly connected to the outer arc wall of the testing chamber 4. A winding reel 39 is rotatably connected to the inner groove of the winding box 37. The drawstring 38 is fixedly connected to the winding reel 39 and wound around it. Rebound torsion springs 40 are installed at both ends of the winding reel 39.

[0050] A method for testing a centrifugal compressor using a centrifugal vibration testing device comprises the following steps:

[0051] Step 1: During the test, the shaft core impeller of the centrifugal compressor is moved between the two test frames 7, and then the two ends of the shaft core impeller are respectively installed on the inner side of the mounting head 8. Subsequently, the test frame 7 with the shaft core impeller of the centrifugal compressor installed is driven by the rotating rod 6 to rotate upward on the inner side of the crossbar frame 5;

[0052] Step 2: As the test frame 7 rotates and lifts upward, the closing push plate 11 is lifted and then contacts the movable baffle 20. The closing push plate 11 pushes the movable baffle 20, and the movable baffle 20 drives the closing movable plate 13 to slide inside the side block 12 toward the back of the base 1. The rack 14 inside the closing movable plate 13 drives the driving gear 15 to rotate, and the driving gear 15 drives the closing gear 18 to rotate;

[0053] Step 3: The closing gear 18 drives the connecting rod 17 to rotate, and the connecting rod 17 drives the closing pressure plate 19 to move toward the test chamber 4. At this time, the upper and lower test chambers 4 can be pushed to rotate and close on the horizontal frame 3 through the closing pressure plate 19. When the test chamber 4 rotates and closes, the test frame 7 has rotated to the corresponding position. The closing of the test chamber 4 can close and wrap the shaft core impeller of the centrifugal compressor, and then the shaft core impeller rotates inside the test chamber 4 to perform a centrifugal vibration test.

[0054] Example 1

[0055] In this embodiment, in order to improve the accuracy of the centrifugal vibration test of the centrifugal compressor, the impeller structure of the centrifugal compressor is moved to the mounting head 8 position of the test frame 7, and then the limiting arc plate 26 of the mounting head 8 is opened, and then the two end shafts of the impeller structure are installed in the bearings inside the mounting head 8, and then the limiting arc plate 26 is bolted to the outside of the mounting head 8, and then the No. 2 motor 28 is started, and the No. 2 motor 28 drives the rotating rod 6 to rotate between the cross bar frame 5. At this time, the test frame 7 can drive the impeller structure to rotate and lift from the front of the base 1, and then the test frame 7 is rotated to be perpendicular to the base 1. At this time, the test frame 7 is blocked by the block 29 and is in a state of being accurately perpendicular to the base 1. At this time, the mounting head 8 and the impeller structure are moved to the position between the two test chambers 4.

[0056] In this embodiment, when the test stand 7 lifts the impeller structure under the rotation of the rotating rod 6, the closing push plate 11 also rotates, and then the front end of the closing push plate 11 rotates and contacts the movable baffle 20. At this time, the closing push plate 11 pushes the movable baffle 20 to move toward the back of the base 1. At this time, the movable baffle 20 can push the closing movable plate 13 to slide inside the side block 12. At this time, the closing movable plate 13 drives the driving gear 15 to rotate through the rack 14. Racks 14 are provided inside the two closing movable plates 13, and the two sets of racks 14 are respectively provided on the top inner groove wall and the bottom inner groove wall of the corresponding inner groove of the closing movable plate 13, and are mirrored up and down. The driving gear 15 is a combination of two gears, one large and one small. A shaft rod is provided at the center of the driving gear 15, and the shaft The rod rotation is arranged on the vertical plate 2, wherein the rack 14 is meshed with the small gear of the driving gear 15, and the small gear drives the large gear to rotate, and the large gear is meshed with the closing gear 18. At this time, the driving gear 15 can drive the closing gear 18 to rotate, and then the closing gear 18 drives the connecting rod 17 to rotate, and the end of the connecting rod 17 rotates on the rod column 16, and the connecting rod 17 also passes through and is rotatably connected to a support plate, which is fixedly connected to the vertical plate 2. The two connecting rods 17 drive the closing pressure plate 19 on its outer side to rotate toward the direction of the test chamber 4, and then the closing pressure plate 19 pushes the upper and lower test chambers 4 to rotate and close. During the process, the pressure wheel 36 rotates to squeeze the test chamber 4, so that the closing pressure plate 19 can push the test chamber 4 to close more smoothly. At this time, the impeller structure can be wrapped by the test chamber 4.

[0057] In this embodiment, the impeller structure of the centrifugal compressor is assembled into the interior of the closed test chamber 4, and then the No. 1 motor 27 is started to drive the impeller structure to rotate. The impeller structure rotates in the slot body of the test slot core 21. At this time, the centrifugal vibration of its rotation can be tested by the vibration sensor 22. The vibration sensor 22 used here is an application of the existing technology, and its specific working principle is not described here. After the centrifugal vibration test of the impeller structure is completed, the closing push plate 11 is moved out of the position of the movable baffle 20, the push limit of the movable baffle 20 is released, and then the movable baffle 20 is closed. The movable plate 13 moves toward the front of the base 1 to reset. At this time, the rack 14 drives the driving gear 15 to reverse. The driving gear 15 reverses and engages to drive the closing gear 18 to reverse. The closing gear 18 can now drive the connecting rod 17 and the closing pressure plate 19 to reset. At this time, the extrusion limit of the closing pressure plate 19 on the test chamber 4 is released, and then the test chamber 4 is opened. At this time, the No. 2 motor 28 drives the rotating rod 6 to rotate, and the test frame 7 and the closing push plate 11 can be rotated and moved down from a vertical state to the top of the base 1 to the front of the base 1. Then the impeller structure can be removed from the mounting head 8 to complete the centrifugal vibration test of the core components of a centrifugal compressor.

[0058] Example 2

[0059] In this embodiment, in order to facilitate the rapid test and unloading after the centrifugal vibration test is completed, when the closing push plate 11 squeezes and pushes the movable baffle 20, the movable baffle 20 drives the closing movable plate 13 to move toward the back of the base 1, and the movable baffle 20 also pushes the limit rod 32 to move synchronously. During the process, the limit rod 32 slides on the inside of the limit block 33 and drives the No. 2 spring 34 to be stretched. Therefore, when the closing push plate 11 releases the squeezing limit on the movable baffle 20, the No. 2 spring 34 rebounds and resets. At this time, the movable baffle 20 can drive the closing movable plate 13 to move toward the front direction of the base 1 and reset.

[0060] In this embodiment, in order to realize the movement of the closing push plate 11, an electromagnetic lock 30 is set to magnetically attract the closing push plate 11. At this time, the closing push plate 11 is in a position close to the push plate seat 9 on the movable frame 10. At the same time, the closing push plate 11 drives the No. 1 spring 31 to stretch. When the impeller structure completes the vibration test, the electromagnetic lock 30 is powered off, and the magnetic attraction of the closing push plate 11 is released. At this time, the No. 1 spring 31 rebounds, driving the closing push plate 11 to move on the movable frame 10 toward the side away from the test frame 7. Then the closing push plate 11 can be moved away from the front of the movable baffle 20, releasing the blocking limit on the movable baffle 20. At this time, the movable baffle 20 can be reset by rebounding through the No. 2 spring 34.

[0061] Example 3

[0062] When the test chamber 4 is closed, the test chamber 4 will pull the drawstring 38 out of the drawstring box 37 and extend it. At this time, the drawstring 38 will be unwound from the drawstring reel 39, and the drawstring reel 39 will be driven to rotate. The rotation of the drawstring reel 39 will drive the rebound torsion spring 40 to rotate and contract. When the limit in Example 2 is released, the rebound torsion spring 40 will rebound and reset, driving the drawstring reel 39 to reverse and rewind the drawstring 38. At this time, the test chamber 4 can be opened from the closed state by the winding of the drawstring 38, and then the test frame 7 can drive the impeller structure to move out from the inside of the test chamber 4, thereby realizing rapid assembly testing and test discharging, improving the centrifugal vibration testing device, and being able to more conveniently and efficiently carry out centrifugal vibration testing of centrifugal compressors continuously.

[0063] Example 4

[0064] In this embodiment, in order to improve the stability of the use of the centrifugal vibration test device, when the upper and lower test chambers 4 rotate to close or open, the rollers 23 at both ends roll in the guide grooves 24 of the vertical plate 2, so that the rotation of the test chamber 4 is stable. At the same time, the test chamber 4 is limited by the rotating ring 25 of the horizontal frame 3, so that the test chamber 4 can be stably rotated, closed and opened. Then, when the closed movable plate 13 slides on the inside of the side block 12, it slides in coordination with the side block 12 through the limiting bar 35, further improving the sliding stability of the closed movable plate 13, and the end position of the closing push plate 11 is set in an arc surface, which first contacts the movable baffle 20 through the arc surface end, so that the closing push plate 11 can push the movable baffle 20 more accurately and stably, making the use process of the entire centrifugal vibration test device more stable.

[0065] Regarding the apparatus in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated again here.

[0066] In the description of this application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0067] The above describes specific embodiments of the present invention. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art may make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. The embodiments of this application and the features in the embodiments may be combined with each other in any manner unless there is a conflict.

Claims

1. A centrifugal vibration test device for a centrifugal compressor, characterized in that: include: Base (1), test chamber (4), test frame (7), closing push plate (11), closing movable plate (13); Two vertical plates (2) are connected to the top of the base (1), a horizontal frame (3) is connected between the two vertical plates (2), and the test chamber (4) is installed on the horizontal frame (3); The front of the base (1) is provided with two crossbar frames (5), a rotating rod (6) is connected between the two crossbar frames (5), a test frame (7) is mounted on the rotating rod (6), an end of the test frame (7) away from the rotating rod (6) is provided with a mounting head (8), and a closing push plate (11) is mounted on the outside of the test frame (7); The outer side of the vertical plate (2) is connected to a side block (12), and the closed movable plate (13) penetrates and is slidably connected to the side block (12).

2. The centrifugal vibration testing device for a centrifugal compressor according to claim 1, characterized in that: A rack (14) is provided on the inner side of the closing movable plate (13), the rack (14) is meshedly connected with the driving gear (15), and the closing gear (18) is meshedly connected with the driving gear (15); The two closing gears (18) are connected to a connecting rod (17) on opposite sides. The outer side of the connecting rod (17) is connected to a closing pressure plate (19). The front end of the closing movable plate (13) is connected to a movable baffle (20). The middle position of the back of the base (1) is connected to a rod column (16). The end of the connecting rod (17) away from the closing gear (18) is rotatably connected to the rod column (16).

3. The centrifugal vibration testing device for a centrifugal compressor according to claim 1, characterized in that: The test frame (7) is provided with a push plate seat (9) on the outer side, a movable frame (10) is installed on the outer side of the push plate seat (9), a closing push plate (11) is slidably installed on the movable frame (10), an electromagnetic lock (30) is connected to the side of the push plate seat (9) close to the movable frame (10), and a No. 1 spring (31) is connected between the side of the closing push plate (11) away from the push plate seat (9) and the inner side of the movable frame (10).

4. The centrifugal vibration testing device for a centrifugal compressor according to claim 1, characterized in that: The inner groove of the test chamber (4) is connected to a test slot core (21), and a vibration sensor (22) is installed on the inner groove wall of the test slot core (21). Both ends of the test chamber (4) are connected to rollers (23). A guide groove (24) is provided on a side of the vertical plate (2) opposite to the roller (23). The roller (23) and the guide groove (24) are adapted and slidably connected. A rotating ring (25) is connected to a side of the horizontal frame (3) close to the test chamber (4). The rotating ring (25) penetrates and is slidably connected to the test chamber (4).

5. The centrifugal vibration testing device for a centrifugal compressor according to claim 1, characterized in that: The side of the mounting head (8) away from the test frame (7) is bolted to a limiting arc plate (26), one of the mounting heads (8) is bolted to a No. 1 motor (27) on the outer side, a bearing is installed inside the mounting head (8), the output end of the No. 1 motor (27) passes through the side wall of the mounting head (8) and is connected to the shaft rod opposite to the bearing, one of the cross bar frames (5) is connected to a No. 2 motor (28) on the outer side, the output end of the No. 2 motor (28) passes through the cross bar frame (5) and is connected to the end of the rotating rod (6), and a stopper (29) is connected to the edge of one side of the top of the base (1) close to the test frame (7).

6. The centrifugal vibration testing device for a centrifugal compressor according to claim 2, characterized in that: The movable baffle (20) is connected to a limiting rod (32) at an upper position on one side close to the closed movable plate (13); the outer wall of the vertical plate (2) on one side opposite to the limiting rod (32) is connected to a limiting block (33); the limiting rod (32) and the limiting block (33) are penetrated and slidably connected; a No. 2 spring (34) is connected between the limiting rod (32) and the limiting block (33).

7. The centrifugal vibration testing device for a centrifugal compressor according to claim 1, characterized in that: The top and bottom of the closed movable panel (13) are connected with a limiting strip (35), and the limiting strip (35) penetrates and is slidably connected to the side block (12).

8. The centrifugal vibration testing device for a centrifugal compressor according to claim 2, characterized in that: The end of the closing pressure plate (19) away from the connecting rod (17) is rotatably connected to a pressure wheel (36), and the pressure wheel (36) rotates to squeeze the test chamber (4), so that the closing pressure plate (19) can push the test chamber (4) to close.

9. The centrifugal vibration testing device for a centrifugal compressor according to claim 1, characterized in that: A winding box (37) is connected to the side of the horizontal frame (3) away from the test chamber (4), and a drawstring (38) is connected to the top and bottom of the winding box (37), and the outer end of the drawstring (38) is connected to the outer arc wall of the test chamber (4); The inner groove of the winding box (37) is rotatably connected to a winding disk (39), the drawstring (38) is fixed to the winding disk (39) and is wound and connected, and rebound torsion springs (40) are provided at both ends of the winding disk (39).

10. A method for testing a centrifugal compressor using the centrifugal vibration testing device according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: During the test, the shaft core impeller of the centrifugal compressor is moved between two test frames (7), and then both ends of the shaft core impeller are respectively installed on the inner side of the mounting head (8), and then the test frame (7) on which the shaft core impeller of the centrifugal compressor is installed is driven by the rotating rod (6) to rotate upward on the inner side of the crossbar frame (5); Step 2: As the test frame (7) rotates and lifts upward, the closing push plate (11) is lifted and then contacts the movable baffle (20). At this time, the closing push plate (11) pushes the movable baffle (20), and the movable baffle (20) drives the closing movable plate (13) to slide inside the side block (12) toward the back of the base (1). The rack (14) inside the closing movable plate (13) drives the driving gear (15) to rotate, and the driving gear (15) drives the closing gear (18) to rotate; Step 3: The closing gear (18) drives the connecting rod (17) to rotate, and the connecting rod (17) drives the closing pressure plate (19) to move toward the test chamber (4). At this time, the upper and lower test chambers (4) can be pushed to rotate and close on the horizontal frame (3) through the closing pressure plate (19). When the test chamber (4) rotates and closes, the test frame (7) has rotated to the corresponding position. The test chamber (4) is closed to close and wrap the shaft core impeller of the centrifugal compressor. Then the shaft core impeller rotates inside the test chamber (4) to perform a centrifugal vibration test.

Images