Device for monitoring abrasion loss of sliding bearing in real time

Abstract

The invention discloses a real-time monitoring device for the abrasion loss of a sliding bearing, and belongs to the technical field of bearings. The parallel conductor bundle is used for monitoring the change of the abrasion loss of the bearing; the N resistors are respectively connected with one end of each conductor in the parallel conductor bundle so as to measure the change of the abrasion loss of the bearing; the signal cable is used for being connected with the parallel conductor bundle and the N resistors to realize electric signal transmission; and the substrate is used for fixing the parallel conductor bundles, the N resistors and the conductors. According to the monitoring device, the precise conductor parallel bundles and the high-precision assignment resistors are adopted to form a network structure, monitoring data are stable, the monitoring device is slightly influenced by the environment, the problem of precise monitoring of the abrasion loss of the sliding bearing is solved, and the monitoring technical level of the sliding bearing is improved. Meanwhile, the abrasion loss monitoring device has certain universality and can be popularized to other occasions where the abrasion loss needs to be monitored.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of digitalization of sliding bearing, and relates to a sliding bearing wear amount real-time monitoring device. BACKGROUND

[0002] The sliding bearing is a main part of large low-speed heavy-load rotating equipment, and plays a role of supporting the rotating part, ensuring the position of the rotating shaft, and stabilizing and precision. Its own and running state directly affect the equipment state, and thus reliable monitoring and guarantee are needed.

[0003] In recent years, the demand for monitoring and life prediction of the sliding bearing urgently needs the technology and equipment for accurately monitoring the bearing wear amount. The existing wear amount monitoring device has problems of large discreteness, large error, and large temperature drift. SUMMARY

[0004] In order to solve the above problems, the technical scheme adopted by the present application is as follows: a sliding bearing wear amount real-time monitoring device, comprising: Parallel conductor bundle: used for monitoring the change of the bearing wear amount; N resistors: used for being connected with one end of each conductor in the parallel conductor bundle respectively, and capable of monitoring the bearing wear amount in real time by generating resistance value change caused by the change of the parallel conductor bundle on-off caused by the bearing wear; Signal cable: used for being connected with the parallel conductor bundle and the N resistors, and realizing electric signal transmission; Base plate: used for fixing the parallel conductor bundle, the N resistors, and the conductor; Housing: used for being arranged outside the parallel conductor bundle, the N resistors, and the base plate, wherein one end of the conductor is arranged outside the housing; Wherein the first conductor in the parallel conductor bundle is arranged in parallel with the initial friction surface of the bearing; The housing, the base plate, the parallel conductor bundle, and the N resistors are wrapped and fixed as a whole by a resin material.

[0005] Further, the parallel conductor bundle comprises N conductors: the first conductor, the second conductor,..., and the Nth conductor; The first conductor, the second conductor,..., and the Nth conductor are sequentially arranged according to the direction of the change of the bearing wear amount and at a certain distance.

[0006] Further, the range of N is 2-33.

[0007] Further, the base plate adopts a low-friction insulating material.

[0008] Further, the resistor adopts a precision single body or a size-resistance, and the values of N resistors are set equal or according to a difference value, and different linear changes are presented; the resistor selects a high-precision resistor with precision ≤±1% and temperature coefficient ≤±100PPM.

[0009] Further, the conductor adopts electrolytic copper material or copper alloy.

[0010] Further, the distance ranges from 0.01mm to 0.20mm.

[0011] Further, the support is fixed outside the bearing through bolts and pins.

[0012] Further, the device is installed on the edge or inside of the bearing.

[0013] According to any one of the sliding bearing wear amount real-time monitoring device systems, comprising: The wear amount real-time monitoring device is used for converting the change of the bearing wear amount into an electric signal for output; The signal converter is used for receiving the electric signal output by the wear amount real-time monitoring device and converting the electric signal into a specific digital signal of the wear amount for output.

[0014] The sliding bearing wear amount real-time monitoring device provided by the application has the advantages that the monitoring device adopts a network structure composed of precise parallel conductor beams and high-precision value resistors, the monitoring data are stable, the influence of the environment is small, the problem of accurate monitoring of the sliding bearing wear amount is solved, and the monitoring technology level of the sliding bearing is improved.

[0015] Meanwhile, the wear amount monitoring device has a certain universality and can be popularized to other occasions requiring monitoring of the wear amount. The technical scheme for reliably monitoring the sliding bearing wear amount better solves the problem and meets the needs of actual operation. The application has the following advantages: 1. The application can continuously monitor the sliding bearing wear amount, better ensures the safety of system equipment, and provides basic data for fault and life prediction.

[0016] 2. The base body selected in the application is made of a material with stable size, low friction and insulation characteristics, so that the performance of the sensor is stable, and the wear part is protected.

[0017] 3. The monitoring device can be integrated in the shell to form an integrated sensor, so that the signal transmission purpose of digitization and address allocation of each sensor through a bus is achieved, and the number of cables for laying multiple monitoring devices is reduced.

[0018] Based on the above reasons, the application can be widely popularized in the field of sliding bearings and extended to other fields with similar requirements. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0020] Figure 1 is the circuit diagram of the monitoring device; Figure 2 is the simulation schematic diagram I of the circuit of the bearing monitoring device; Figure 3 is the simulation schematic diagram II of the circuit of the bearing monitoring device; Figure 4 is the overall schematic diagram of the monitoring device of the present application; wherein (a) is a perspective view, and (b) is a schematic diagram of the device in reality; Figure 5 is the schematic diagram of the change of the wear amount.

[0021] Reference signs: 1, parallel conductor bundle, 2, resistor, 3, signal cable, 4, base plate, 5, housing. DETAILED DESCRIPTION

[0022] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict, and the present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings of the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present application.

[0024] Figure 1 is the circuit diagram of the monitoring device; Figure 2 is the simulation schematic diagram I of the circuit of the bearing monitoring device; Figure 3 is the simulation schematic diagram II of the circuit of the bearing monitoring device; Figure 4 is the overall schematic diagram of the monitoring device of the present application; wherein (a) is a perspective view, and (b) is a schematic diagram of the device in reality; A sliding bearing wear amount real-time monitoring device, comprising: Parallel conductor bundle 1: for monitoring changes in bearing wear amount; N resistors 2: for connecting to one end of each conductor in the parallel conductor bundle 1, respectively, and generating resistance value changes through changes in the on-off of the parallel conductor bundle 1 caused by bearing wear, so as to monitor the bearing wear amount in real time; Signal cable 3: for connecting to the parallel conductor bundle 1 and N resistors 2 to realize electrical signal transmission; Base plate 4: for fixing the parallel conductor bundle 1, N resistors 2, and conductors; Housing 5: for being arranged outside the parallel conductor bundle 1, N resistors 2, and base plate 4, wherein one end of the conductor is arranged outside the housing 5; the housing 5 can adopt a square or a cylinder; an insulating filling medium is arranged inside the housing 5 to fix the base plate 4 inside; Wherein the first conductor of the parallel conductor bundle 1 is arranged flush with the initial friction surface; the initial friction surface is the friction surface of the bearing when it is not used; Further: the parallel conductor bundle 1 includes N conductors: including a first conductor, a second conductor,..., and an Nth conductor; The first conductor, the second conductor,..., and the Nth conductor are sequentially arranged according to the direction of the change in the wear amount and at a certain distance.

[0025] Further: the N is usually in the range of 2-33, and can be larger.

[0026] Further: the base plate 4 adopts a low-friction insulating material.

[0027] Further: the resistor adopts a precision single or a row resistor, the values of the N resistors 2 are set to be equal or are set according to a difference, and different linear changes are presented; the equal values are set as an arithmetic progression or a geometric progression to meet different rules of wear amount and output; The resistor selects a high-precision resistor with a precision ≤±1% and a temperature coefficient ≤±100PPM, which has high precision and stability.

[0028] Further: the conductor adopts electrolytic copper, copper alloy, or other conductive materials.

[0029] Further: the distance is in the range of 0.05-0.10mm.

[0030] Further: the device is installed on the edge or inside of the bearing.

[0031] According to the system of the sliding bearing wear amount real-time monitoring device, comprising Wear amount real-time monitoring device: for converting the change of bearing wear amount into an electrical signal for output; Signal converter: for receiving the electrical signal output by the wear amount real-time monitoring device and converting it into a specific numerical signal of the wear amount.

[0032] The bearing wear amount is converted into an electrical resistance change signal in real time, and the bearing wear amount data is output through a cable connected converter or a converter integrated with the monitoring device.

[0033] Embodiment 1: A sliding bearing wear amount monitoring device, comprising a wear detection device installed on the edge or inside of the monitored bearing, comprising a precision parallel conductor bundle 1, N value resistors 2, a signal cable 3, a base plate 4 support body and a sensor support. The monitoring device comprises a conductor parallel bundle and a high-precision resistor assigned to each conductor line, which are arranged flush with the bearing friction surface and are made by precise control of size and spacing. The signal cable 3 is led out and connected to the monitoring equipment.

[0034] The precision conductor parallel bundle is composed of rectangular electrolytic copper material with a thickness of 0.015 and a width of 0.05. Through precision machining, the parallel bundle conductor and the spacing in the measurement direction can be set between 0.01-0.20mm, respectively, to form a network structure that gradually breaks down with wear.

[0035] The value resistor is a precision monomer or row resistor, which can be set as equal or different values to make the monitoring network show different linear changes.

[0036] The support body of the conductor parallel bundle and the resistor circuit is made of low-friction insulating material, and is wrapped and fixed as a whole monitoring device with resin-based material.

[0037] The parallel conductor bundle 1 and the value resistor of the wear monitoring device are packaged and formed with the self-lubricating insulating material base plate 4 and the shell 5 by adhesive to form the wear monitoring device main body. The wear monitoring device main body outputs the wear signal through the connecting cable, or converts the wear analog signal into a digital signal output through the converter integrated in the sensor shell 5.

[0038] The base plate 4 can be made of polyimide material, which has good friction and wear performance and has little effect on the performance of the bearing.

[0039] The above whole components are connected with the signal cable 3, and then fixed on the sensor support through a pin, and then filled and sealed with oil and water resistant epoxy glue to form a real-time wear monitoring device.

[0040] The real-time wear monitoring device of the application is installed on the edge of the bearing bush or at a position determined as needed. The running state and wear amount of the bearing bush are continuously monitored.

[0041] The device is applied to the main shaft sliding bearing of a wind turbine generator set, as shown in Figure 5 .

[0042] The wind power main shaft radial bearing is composed of multiple pads, which are arranged uniformly or non-uniformly in the circumferential direction according to the force direction. The sensor of the present application is installed on the edge of the pad in the main force direction or multiple directions, constituting real-time monitoring of the bearing wear amount, reflecting the bearing operation state and safe service life. According to the monitored bearing and the signal transmission distance and converter, different resistance schemes can be selected. Take two examples: a lower resistance assignment resistance setting scheme 1 designed according to a 12-level parallel beam structure, as shown in Table 1: Table 1: Assignment resistance setting scheme 1 designed according to a 12-level parallel beam structure

[0043] A higher resistance assignment resistance setting scheme 2 designed according to a 12-level parallel beam structure, as shown in Table 2: Table 2: Assignment resistance setting scheme 2 designed according to a 12-level parallel beam structure

[0044] The relationship between the sensor resistance value and the wear amount corresponding to scheme 2 is shown in Figure 5 ; Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A device for real-time monitoring of the wear of a plain bearing, characterized in that: It comprises: Parallel conductor bundle: for monitoring the change of bearing wear; N resistors: for connecting with one end of each conductor in the parallel conductor bundle respectively, and generating resistance value change through the change of parallel conductor bundle caused by bearing wear, so as to monitor the bearing wear in real time; Signal cable: for connecting with the parallel conductor bundle and N resistors, and realizing electric signal transmission; Base plate: for fixing the parallel conductor bundle, N resistors and conductors; Shell: for being arranged outside the parallel conductor bundle, N resistors and base plate, wherein one end of the conductor is arranged outside the shell; Wherein the first conductor in the parallel conductor bundle is arranged in parallel with the initial friction surface of the bearing; The shell, base plate, parallel conductor bundle and N resistors are wrapped and fixed as a whole by a resin material.

2. A real-time monitoring device for wear of a sliding bearing according to claim 1, characterized in that: The parallel conductor bundle comprises N conductors: first conductor, second conductor, …, Nth conductor. The first conductor, second conductor, …, Nth conductor are sequentially arranged according to the direction and interval of the change of bearing wear.

3. A real-time monitoring device for wear of a sliding bearing according to claim 1, characterized in that: The range of N is 2-33.

4. The real-time monitoring device for wear of a sliding bearing according to claim 1, characterized in that: The base plate adopts low-friction insulating material.

5. The real-time wear monitoring device for sliding bearings according to claim 2, characterized in that The resistor adopts precise single body or array resistor, the values of N resistors are set equal or according to difference, and different linear changes are presented; the resistor selects high-precision resistor with precision ≤±1% and temperature coefficient ≤±100PPM.

6. A real-time wear monitoring device for a plain bearing according to claim 1, characterized in that The conductor adopts electrolytic copper material or copper alloy.

7. The real-time wear monitoring device for sliding bearings according to claim 1, characterized in that The range of the distance is 0.01mm-0.20mm.

8. A real-time wear monitoring device for a plain bearing according to claim 1, characterized in that It further comprises a support fixed on the outside of the bearing by bolts and pins.

9. The real-time wear monitoring device of a sliding bearing according to claim 1, characterized in that: The device is installed on the edge or inside of the bearing.

10. A system of a sliding bearing wear amount real-time monitoring device according to any one of claims 1 to 9, characterized in that: It comprises: Wear real-time monitoring device: for converting the change of bearing wear into electric signal and outputting; Signal converter: for receiving the electric signal output by the wear real-time monitoring device and converting into specific digital signal of wear output.

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