Vibration measuring device for rotary-vane vacuum pump
By designing a vibration measuring device including a base, vibration sensor and test bench, using double-head bolts and telescopic support legs to fix the rotary plate vacuum pump, the problems of inaccurate measurement and damage in the prior art are solved, and the rotary plate is realized Accurate measurement and improvement of vibration parameters of type vacuum pump.
Patent Information
- Application Number
- CN202420999451.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-09
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2034-05-09
AI Technical Summary
It is difficult for existing vibration measuring equipment to accurately measure the vibration parameters of rotary vacuum pumps, and traditional fixing methods can easily lead to inaccurate or damage to the measurement results.
A vibration measuring device including a base, vibration sensor and test bench is designed to fix the rotary vacuum pump with double-head bolts, combined with telescopic support legs and universal wheels to ensure the stability and flexibility of the measuring device, and through data The collector and analyzer perform signal analysis.
It realizes accurate measurement of the vibration parameters of the rotary vacuum pump product without affecting the rotary vacuum pump product, providing a simple structure, convenient measurement and accurate results, providing a basis for obtaining and improving the vibration parameters of the rotary vacuum pump.
Smart Images
Figure CN222336541U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of vibration detection of a rotary vane vacuum pump, in particular to a vibration measuring device for a rotary vane vacuum pump. Background Art
[0002] The vibration parameter of the rotary vane vacuum pump during operation is an important product parameter of the rotary vane vacuum pump, so it is necessary to measure it. On the one hand, the existing vibration measurement equipment uses magnetic attraction to adsorb the vibration sensor or uses strong glue to bond the vibration sensor to the test position of the device to be tested, and then measures the vibration performance of the device to be tested through the corresponding signal transmission line and vibration signal acquisition and analysis software. For the method of connecting and fixing the vibration sensor using magnetic attraction, since the pump body of the rotary vane vacuum pump is made of aluminum, it is impossible to generate magnetic attraction with the vibration sensor, that is, the vibration sensor cannot be adsorbed on the pump body of the rotary vane vacuum pump, and can only be barely adsorbed on the assembly bolts on the rotary vane vacuum pump. However, the vibration of the rotary vane vacuum pump during operation will cause the vibration sensor barely adsorbed here to loosen or even fall off easily, resulting in inaccurate measurement results. For the method of using strong glue to bond and fix the vibration sensor, it will affect or damage the rotary vane vacuum pump itself.
[0003] On the other hand, due to the unique operating parameters of the rotary vane pump, the specific vibration measurement sampling parameters need to be matched with it, and there is currently no information on this aspect. Therefore, in order to accurately achieve its vibration measurement without completely changing the rotary vane vacuum pump product, a suitable vibration measurement device is required. Utility Model Content
[0004] The purpose of the utility model is to provide a vibration measuring device for a rotary vane vacuum pump, which has a simple structure and accurate measurement results. It can accurately realize its vibration measurement without affecting or damaging the rotary vane vacuum pump product, and provide a method and basis for obtaining and improving the vibration parameters of the rotary vane vacuum pump.
[0005] The embodiments of the present invention are implemented by the following technical solutions:
[0006] A vibration measuring device for a rotary vane vacuum pump comprises a base and a vibration sensor, wherein the base is provided with a through hole, a first bolt is installed in the through hole, the vibration sensor is provided with a bolt hole, a second bolt is installed in the bolt hole, the first bolt and the second bolt are welded, the vibration sensor is connected to a data collector via a signal transmission line, and the data collector is connected to a data analyzer via a wire.
[0007] Furthermore, the vibration measuring device also includes a test bench, the base is installed on the test bench, and the via hole avoids the test bench.
[0008] Furthermore, retractable supporting legs are provided at the bottom of the test bench.
[0009] Furthermore, the supporting leg includes a sleeve, a sliding rod and a cylinder. The interior of the sleeve is divided into a movable area and a fixed area by a partition. The sliding rod is slidably installed in the movable area, and the cylinder is installed in the fixed area. A through hole is opened on the partition, and the piston rod of the cylinder can pass through the through hole to abut against the sliding rod. The other end of the sliding rod is fixedly connected to the test bench.
[0010] Furthermore, a universal wheel is provided at the bottom of the supporting leg, and a brake member is provided on the universal wheel.
[0011] Furthermore, the surface of the test bench is provided with a plurality of anti-slip strips distributed in an array.
[0012] Furthermore, the vibration measuring device also includes a power supply, and the power supply is connected to the data analyzer.
[0013] The technical solution of the embodiment of the utility model has at least the following advantages and beneficial effects:
[0014] In the utility model, the first bolt and the second bolt form a stud bolt, the first bolt is installed on the base, the rotary vane vacuum pump is installed on the base, and the second bolt is installed on the vibration sensor. During measurement, the rotary vane vacuum pump is fixed on the base, and the stud bolt formed by the first bolt and the second bolt generates vibration when the rotary vane vacuum pump is running, so that the vibration sensor connected thereto detects the vibration condition, and the vibration sensor transmits the vibration signal to the data collector and the data analyzer through the signal transmission line, and the vibration signal is analyzed by the data analyzer to measure the vibration performance of the rotary vane vacuum pump. The utility model has the advantages of simple structure, convenient measurement, accurate measurement result, and can accurately realize the vibration measurement of the rotary vane vacuum pump without affecting or damaging the rotary vane vacuum pump product, thereby providing a method and basis for obtaining and improving the vibration parameters of the rotary vane vacuum pump. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.
[0016] Figure 1 A schematic structural diagram of a vibration measuring device for a rotary vane vacuum pump provided in Example 1 of the utility model;
[0017] Figure 2Another structural schematic diagram of the test bench provided in Example 1 of the utility model.
[0018] Icon: 1-rotary vane vacuum pump, 2-base, 3-through hole, 4-first bolt, 5-vibration sensor, 6-bolt hole, 7-second bolt, 8-signal transmission line, 9-data collector, 10-data analyzer, 11-test bench, 12-support leg, 13-anti-slip strip, 14-power supply, 15-universal wheel, 121-sleeve, 122-slide rod, 123-partition, 124-movable area, 125-fixed area, 126-cylinder. DETAILED DESCRIPTION
[0019] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.
[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0021] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0022] In the description of the present invention, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the application is usually placed when used. It is only for the convenience of describing the present invention and simplifying the description, and does 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 the present invention.
[0023] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0024] Example 1
[0025] like Figure 1-2 As shown, this embodiment provides a vibration measuring device for a rotary vane vacuum pump 1, including a base 2 and a vibration sensor 5, wherein the base 2 is provided with a through hole 3, a first bolt 4 is installed in the through hole 3, a bolt hole 6 is provided on the vibration sensor 5, a second bolt 7 is installed in the bolt hole 6, the first bolt 4 and the second bolt 7 are welded, the vibration sensor 5 is connected to a data collector 9 via a signal transmission line 8, and the data collector 9 is connected to a data analyzer 10 via a wire.
[0026] The first bolt 4 and the second bolt 7 form a stud bolt, the first bolt 4 is installed on the base 2, the rotary vane vacuum pump 1 is installed on the base 2, and the second bolt 7 is installed on the vibration sensor 5. During measurement, the rotary vane vacuum pump 1 is fixed on the base 2. The stud bolt formed by the first bolt 4 and the second bolt 7 generates vibration when the rotary vane vacuum pump 1 is running, so that the vibration sensor 5 connected thereto detects the vibration condition. The vibration sensor 5 transmits the vibration signal to the data collector 9 and the data analyzer 10 through the signal transmission line 8. The vibration signal is analyzed by the data analyzer 10 to measure the vibration performance of the rotary vane vacuum pump 1. The structure is simple, the measurement is convenient, and the measurement result is accurate. The vibration measurement of the rotary vane vacuum pump 1 can be accurately realized without affecting or damaging the product of the rotary vane vacuum pump 1, thereby providing a method and basis for obtaining and improving the vibration parameters of the rotary vane vacuum pump 1.
[0027] In this embodiment, the vibration measuring device further includes a test bench 11, the base 2 is mounted on the test bench 11, and the through hole 3 avoids the test bench 11. This makes it convenient for the staff to install the first bolt 4, and can achieve rapid welding of the first bolt 4 and the second bolt 7 on the vibration sensor 5, thereby improving the measurement efficiency.
[0028] In this embodiment, a retractable support leg 12 is provided at the bottom of the test bench 11. There are multiple support legs 12, which are used to support the test bench 11 and ensure the stability of the test bench 11. This makes it easy to adjust the height of the test bench 11 and facilitates different staff members to install and disassemble the vibration measurement device.
[0029] In this embodiment, the support leg 12 includes a sleeve 121, a slide bar 122 and a cylinder 126. The interior of the sleeve 121 is divided into an active area 124 and a fixed area 125 by a partition 123. The slide bar 122 is slidably installed in the active area 124, and the cylinder 126 is installed in the fixed area 125. A through hole is provided on the partition 123, and the piston rod of the cylinder 126 can pass through the through hole to abut against the slide bar 122. The other end of the slide bar 122 is fixedly connected to the test bench 11. When in use, the slide bar 122 is driven by the cylinder 126 to slide vertically upward in the sleeve 121, and the slide bar 122 drives the test bench 11 to move upward in the vertical direction, thereby realizing the adjustment of the height of the test bench 11, which can ensure the stability of the test bench 11 during the rising process and prevent the rotary vane vacuum pump 1 from falling.
[0030] In this embodiment, a universal wheel 15 is provided at the bottom of the support leg 12, and a brake is provided on the universal wheel 15. This makes it convenient to transfer the test bench 11 and to carry the rotary vane vacuum pump 1. The brake can prevent the universal wheel 15 from moving during the vibration measurement, thereby improving the stability of the rotary vane vacuum pump 1 during the vibration measurement. The brake is a component used in the prior art that plays a braking role.
[0031] In this embodiment, the surface of the test bench 11 is provided with a plurality of anti-slip strips 13 distributed in an array. The anti-slip strips 13 may be silicone strips or rubber strips, which can prevent the rotary vane vacuum pump 1 from sliding on the surface of the test bench 11, thereby improving the accuracy of the test results and the safety of the measurement process.
[0032] In this embodiment, the vibration measuring device further includes a power supply 14, and the power supply 14 is connected to the data analyzer 10. The power supply 14 is also connected to the rotary vane vacuum pump 1. When the data analyzer 10 detects that the vibration is abnormal, the power supply 14 can be automatically turned off, so that the rotary vane vacuum pump 1 stops running, ensuring the safety of the vibration measurement process.
[0033] A vibration measurement method for a vibration measurement device of a rotary vane vacuum pump 1 is as follows:
[0034] Place the rotary vane vacuum pump 1 on the test bench 11 so that the through hole 3 on the base 2 is away from the edge of the test bench 11 so that the vibration sensor 5 can be installed smoothly;
[0035] According to the size of the vibration sensor 5, a bolt hole 6 is processed on the top surface thereof;
[0036] Welding together a second bolt 7 matching a bolt hole 6 processed on a vibration sensor 5 and a first bolt 4 matching a through hole 3 on a base 2 of a rotary vane vacuum pump 1 to form a stud bolt;
[0037] After the vibration sensor 5 is connected and fixed to the rotary vane vacuum pump 1, the signal transmission line 8, the data acquisition device 9, and the data analyzer 10 are connected;
[0038] After the vibration measuring device is connected, the rotary vane vacuum pump 1 is turned on to make it run;
[0039] Open the data collector 9, set the acquisition parameters, where the sampling frequency is preferably 1000Hz, and then start vibration data acquisition; since the speed of the rotary vane vacuum pump 1 is 1420r / min, the operating frequency of the rotating parts is close to 50Hz, combined with the natural modal frequency obtained after the modal test of the rotary vane vacuum pump 1, the sampling frequency is preferably set to 1000Hz to obtain vibration data comprehensively and accurately;
[0040] After the vibration test data is collected, data post-processing and analysis are performed on the data analyzer 10 .
[0041] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. 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 vibration measuring device for a rotary vane vacuum pump, characterized in that: It includes a base and a vibration sensor, wherein a through hole is provided on the base, a first bolt is installed in the through hole, a bolt hole is provided on the vibration sensor, a second bolt is installed in the bolt hole, the first bolt and the second bolt are welded, the vibration sensor is connected to a data collector via a signal transmission line, and the data collector is connected to a data analyzer via a wire.
2. The vibration measuring device for a rotary vane vacuum pump according to claim 1, characterized in that: The vibration measuring device further includes a test bench, the base is mounted on the test bench, and the via hole avoids the test bench.
3. The vibration measuring device for a rotary vane vacuum pump according to claim 2, characterized in that: The bottom of the test bench is provided with retractable supporting legs.
4. The vibration measuring device for a rotary vane vacuum pump according to claim 3, characterized in that: The supporting leg includes a sleeve, a sliding rod and a cylinder. The interior of the sleeve is divided into a movable area and a fixed area by a partition. The sliding rod is slidably installed in the movable area, and the cylinder is installed in the fixed area. A through hole is opened on the partition, and the piston rod of the cylinder can pass through the through hole to abut against the sliding rod. The other end of the sliding rod is fixedly connected to the test bench.
5. The vibration measuring device for a rotary vane vacuum pump according to claim 3, characterized in that: A universal wheel is arranged at the bottom of the supporting leg, and a brake member is arranged on the universal wheel.
6. The vibration measuring device for a rotary vane vacuum pump according to claim 2, characterized in that: The surface of the test bench is provided with a plurality of anti-slip strips distributed in an array.
7. The vibration measuring device for a rotary vane vacuum pump according to claim 1, characterized in that: The vibration measuring device further comprises a power supply connected to the data analyzer.