Dynamic balance testing device for dynamic scroll plate of oil-free scroll vacuum pump

Abstract

The utility model provides a dynamic balance testing device for a dynamic scroll plate of an oil-free scroll vacuum pump, which belongs to the technical field of oil-free scroll vacuum pumps and comprises a testing platform, a plurality of inserting rods and a plurality of sleeves fixedly connected to the lower end of the testing platform. According to the device, the vibration signals of the movable scroll plate are measured respectively, calculation is carried out in combination with a spectral analysis method, the unbalance state of the movable scroll plate can be reflected more accurately, the automation degree of the testing process is high, and the testing accuracy is high. The testing process can be completed without manual intervention, and the testing device is suitable for dynamic balance testing of dynamic scroll plates of oil-free scroll vacuum pumps of different types and specifications.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil-free scroll vacuum pumps, and in particular relates to a dynamic balance testing device for a movable scroll of an oil-free scroll vacuum pump. Background Art

[0002] With the continuous development of science and technology, oil-free scroll vacuum pumps are increasingly used in industrial production, scientific research and other fields. Oil-free scroll vacuum pumps are a specially designed vacuum pump whose core feature is that no oil is used as a lubricating or sealing medium during operation. Traditional vacuum pumps, such as oil-sealed rotary vane pumps, rely on oil for lubrication and to help seal, while oil-free scroll pumps achieve oil-free operation through innovative mechanical structures.

[0003] However, during the operation of the oil-free scroll vacuum pump, due to the influence of various factors such as design, manufacturing, and installation, the pump rotation may become unbalanced, affecting its performance and service life. Therefore, dynamic balancing test of the oil-free scroll vacuum pump rotation system is one of the important tasks in R&D design and mass production. Utility Model Content

[0004] The utility model aims to provide a dynamic balance test device for a movable scroll of an oil-free scroll vacuum pump, aiming to solve the problem that the balance test of the oil-free scroll vacuum pump in the prior art is inconvenient and difficult.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A dynamic balance test device for a movable scroll of an oil-free scroll vacuum pump, comprising:

[0007] A test platform, wherein a plurality of plug rods are fixedly connected to the lower end of the test platform;

[0008] A plurality of sleeves, wherein the plurality of sleeves are respectively sleeved on the outer surfaces of the plurality of insertion rods;

[0009] A plurality of driving grooves, wherein the plurality of driving grooves are respectively disposed at one end of the plurality of sleeves;

[0010] Two driving rods, the two driving rods are respectively fixedly connected to the adjacent ends of the plurality of insertion rods;

[0011] A movable scroll, wherein the movable scroll is arranged at the upper end of the test platform, and a position sensor is arranged at the upper end of the movable scroll;

[0012] A vibration sensor, wherein the vibration sensor is arranged on the circumferential surface of the orbiting scroll;

[0013] A balance test device, which is disposed on one side of the test platform and is connected to a vibration sensor, a position sensor and a movable scroll through electric wires; and

[0014] The lifting mechanism is arranged at the lower side of the test platform.

[0015] As a preferred solution of the utility model, the lifting mechanism consists of a base plate, a screw and a screw nut, the base plate is fixedly connected to the adjacent ends of multiple sleeves, the screw is rotatably connected to the upper end of the base plate, the screw nut is fixedly connected to the adjacent ends of two driving rods, and the screw nut is threadedly connected to the circumferential surface of the screw.

[0016] As a preferred solution of the utility model, a placement groove is opened at the upper end of the bottom plate, a motor is fixedly connected in the placement groove, and an output end of the motor is fixedly connected to the screw rod.

[0017] As a preferred solution of the utility model, one end of each of the plurality of sleeves is provided with a limiting groove, one end of each of the plurality of insertion rods is fixedly connected to a limiting rod, and the plurality of limiting rods are respectively slidably connected to the plurality of limiting grooves.

[0018] As a preferred solution of the utility model, one end of each of the plurality of limit rods is fixedly connected with an anti-drop plate, and the diameters of the plurality of anti-drop plates are respectively larger than the diameters of the plurality of limit rods.

[0019] As a preferred solution of the utility model, a processing unit and a controller are provided at one end of the balance test device.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] 1. In this scheme, the device can more accurately reflect the imbalance state of the movable scroll by measuring the vibration signal of the movable scroll respectively and calculating it in combination with the spectrum analysis method. The test process has a high degree of automation and can be completed without human intervention. It is also suitable for dynamic balance tests of movable scrolls of oil-free scroll vacuum pumps of different types and specifications.

[0022] 2. In this solution, the insertion rod can be driven to slide in the sleeve through the lifting mechanism, thereby changing the height of the test platform, the movable scroll and the components, so that the staff can place the movable scroll on the test platform and the movable scroll to facilitate rapid inspection. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0024] Figure 1 It is the main stereoscopic view in the utility model;

[0025] Figure 2 It is a side perspective view of the present utility model;

[0026] Figure 3 It is the main sectional stereogram in the utility model.

[0027] In the figure: 1. movable scroll; 2. test platform; 3. vibration sensor; 4. position sensor; 5. balance test device; 6. processing unit; 7. controller; 8. plug rod; 9. sleeve; 10. driving groove; 11. driving rod; 12. bottom plate; 13. motor; 14. screw; 15. screw nut; 16. limit groove; 17. limit rod; 18. anti-drop plate. DETAILED DESCRIPTION

[0028] 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. Example

[0029] See also Figure 1-3 , the utility model provides the following technical solutions:

[0030] A dynamic balance test device for a movable scroll of an oil-free scroll vacuum pump, comprising:

[0031] A test platform 2, a plurality of plug rods 8 are fixedly connected to the lower end of the test platform 2;

[0032] A plurality of sleeves 9, wherein the plurality of sleeves 9 are respectively sleeved on the outer surfaces of the plurality of insertion rods 8;

[0033] A plurality of driving grooves 10, wherein the plurality of driving grooves 10 are respectively disposed at one end of the plurality of sleeves 9;

[0034] Two driving rods 11, the two driving rods 11 are respectively fixedly connected to the adjacent ends of the plurality of insertion rods 8;

[0035] A movable scroll 1, which is arranged at the upper end of a test platform 2, and a position sensor 4 is arranged at the upper end of the movable scroll 1;

[0036] A vibration sensor 3, which is arranged on the circumferential surface of the movable scroll 1;

[0037] A balance test device 5, which is disposed on one side of the test platform 2 and is connected to the vibration sensor 3, the position sensor 4 and the movable scroll 1 through electric wires; and

[0038] The lifting mechanism is arranged at the lower side of the test platform 2, and the lifting mechanism is composed of a base plate 12, a screw rod 14 and a screw rod nut 15. The base plate 12 is fixedly connected to the adjacent ends of the plurality of sleeves 9, the screw rod 14 is rotatably connected to the upper end of the base plate 12, the screw rod nut 15 is fixedly connected to the adjacent ends of the two driving rods 11, and the screw rod nut 15 is threadedly connected to the circumferential surface of the screw rod 14;

[0039] A processing unit 6 and a controller 7 are provided at one end of the balance test device 5 .

[0040] In a specific embodiment of the utility model, the movable scroll 1 to be tested is installed on a test platform 2, and a position sensor 3 and a vibration sensor 4 are respectively arranged in the axial direction and the radial direction. The position sensor 3 and the vibration sensor 4 are respectively connected to a balance test device 5. The test system includes a sensor signal acquisition and processing unit 6 and a controller 7. The sensor signal acquisition and processing unit 6 is used to monitor the rotation speed of the movable scroll 1 in real time. The controller 7 is used to control the rotation speed and operating state of the movable scroll 1. In actual use, the screw 14 can be rotated to move the screw nut 15 threaded on its circumferential surface, and the plug 8 is driven to slide in the sleeve 9 through the driving rod 11 and the driving groove 10, so as to facilitate the change of the height of the test platform 2, thereby making the placement of the movable scroll 1 more convenient. It should be noted that the specific type of vibration sensor 3, position sensor 4, balance test device 5, processing unit 6 and controller 7 to be used is selected by relevant technical personnel familiar with the field, and the above-mentioned vibration sensor 3, position sensor 4, balance test device 5, processing unit 6 and controller 7 are all prior art, and this scheme will not be repeated.

[0041] For details, please refer to Figure 2 A placement groove is provided at the upper end of the base plate 12, in which a motor 13 is fixedly connected, and the output end of the motor 13 is fixedly connected to a screw rod 14. Limiting grooves 16 are provided at one end of each of the multiple sleeves 9, and limiting rods 17 are fixedly connected at one end of each of the multiple insertion rods 8. The multiple limiting rods 17 are slidably connected to the multiple limiting grooves 16 respectively.

[0042] In this embodiment: the motor 13 arranged in the slot can automatically drive the screw rod 14 to rotate, thereby improving the automation of the use of the device. When the insertion rod 8 moves, it will drive the limit rod 17 to slide in the limit slot 16, thereby improving the vertical sliding stability of the insertion rod 8.

[0043] For details, please refer to Figure 2 One end of each of the plurality of limit rods 17 is fixedly connected with an anti-dropout plate 18 , and the diameters of the plurality of anti-dropout plates 18 are respectively larger than the diameters of the plurality of limit rods 17 .

[0044] In this embodiment, the anti-slip plate 18 can prevent the limiting rod 17 from being detached from the limiting groove 16, thereby improving the use stability of the device.

[0045] The working principle and use process of the utility model are as follows: the movable scroll 1 to be tested is installed on the test platform 2, and a position sensor 3 and a vibration sensor 4 are respectively arranged in the axial direction and the radial direction. The position sensor 3 and the vibration sensor 4 are respectively connected to the balance test device 5. The test system includes a sensor signal acquisition and processing unit 6 and a controller 7. The sensor signal acquisition and processing unit 6 is used to monitor the rotation speed of the movable scroll 1 in real time, and the controller 7 is used to control the rotation speed and operating state of the movable scroll 1.

[0046] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A dynamic balance test device for a movable scroll of an oil-free scroll vacuum pump, characterized in that: include: A test platform (2), wherein a plurality of plug rods (8) are fixedly connected to the lower end of the test platform (2); A plurality of sleeves (9), wherein the plurality of sleeves (9) are respectively sleeved on the outer surfaces of the plurality of insertion rods (8); A plurality of driving grooves (10), wherein the plurality of driving grooves (10) are respectively disposed at one end of the plurality of sleeves (9); Two driving rods (11), the two driving rods (11) being respectively fixedly connected to adjacent ends of the plurality of insertion rods (8); A movable scroll (1), wherein the movable scroll (1) is arranged at the upper end of the test platform (2), and a position sensor (4) is arranged at the upper end of the movable scroll (1); A vibration sensor (3), wherein the vibration sensor (3) is arranged on the circumferential surface of the orbiting scroll (1); A balance test device (5), wherein the balance test device (5) is arranged on one side of the test platform (2), and the balance test device (5) is connected to the vibration sensor (3), the position sensor (4), and the movable scroll (1) via electric wires; and A lifting mechanism, wherein the lifting mechanism is arranged on the lower side of the test platform (2).

2. The dynamic balance test device for the movable scroll of an oil-free scroll vacuum pump according to claim 1, characterized in that: The lifting mechanism is composed of a base plate (12), a screw rod (14) and a screw rod nut (15); the base plate (12) is fixedly connected to the adjacent ends of a plurality of sleeves (9); the screw rod (14) is rotatably connected to the upper end of the base plate (12); the screw rod nut (15) is fixedly connected to the adjacent ends of two driving rods (11); and the screw rod nut (15) is threadedly connected to the circumferential surface of the screw rod (14).

3. The dynamic balance test device for the movable scroll of an oil-free scroll vacuum pump according to claim 2, characterized in that: A placement groove is provided at the upper end of the bottom plate (12), a motor (13) is fixedly connected in the placement groove, and an output end of the motor (13) is fixedly connected to a screw rod (14).

4. The dynamic balance test device for the movable scroll of an oil-free scroll vacuum pump according to claim 3, characterized in that: One end of each of the plurality of sleeves (9) is provided with a limiting groove (16), one end of each of the plurality of insertion rods (8) is fixedly connected to a limiting rod (17), and the plurality of limiting rods (17) are slidably connected in the plurality of limiting grooves (16), respectively.

5. The dynamic balance test device for the movable scroll of an oil-free scroll vacuum pump according to claim 4, characterized in that: One end of each of the plurality of limit rods (17) is fixedly connected to an anti-slip plate (18), and the diameters of the plurality of anti-slip plates (18) are respectively larger than the diameters of the plurality of limit rods (17).

6. The dynamic balance test device for the movable scroll of an oil-free scroll vacuum pump according to claim 5, characterized in that: A processing unit (6) and a controller (7) are provided at one end of the balance test device (5).

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