Sliding bearing with wear control function

Abstract

The invention discloses a sliding bearing with a wear control function. The sliding bearing comprises a substrate layer, a lubricating conductive layer group, a lead group, a signal converter, a signal display and a power supply assembly, the lubricating conductive layer set comprises a dielectric coating and a conductive coating. The dielectric coating is located between the conductive coating and the substrate layer. The number of the wire groups is at least two. One of the at least two wire groups is electrically connected with the two ends of the substrate layer, and the remaining wire groups are electrically connected with the two ends of the conductive coating. And the signal converter is used for transmitting the processed information to the signal display. And the signal display is used for displaying the signal from the signal converter in time. According to the sliding bearing, the lubricating conducting layer set is arranged on the substrate layer, and the wire set is arranged for the substrate layer and the lubricating conducting layer set, so that a user can conveniently and remotely monitor the abrasion program of the lubricating conducting layer set or the substrate layer, the user can replace the bearing in time, and the loss is reduced to the minimum.

Description

Technical Field

[0001] The invention relates to the technical field of sliding bearing manufacturing, in particular to a sliding bearing with a wear control function. Background Art

[0002] Rolling bearings have always been used in the planetary shafts of wind turbine gearboxes to meet the need to reduce friction when the wind blades rotate for a long time. However, the disadvantages of rolling bearings are that they are expensive and have thicker walls, which leads to a higher overall manufacturing cost of the gearbox and a larger overall volume. Therefore, in order to reduce the manufacturing cost of wind turbines, it is an inevitable trend for sliding bearings to replace rolling bearings. As we all know, sliding bearings are mechanical parts that carry the rotation of the shaft. They slide and rub against the shaft, so they are called sliding bearings. Sliding bearings are also called sleeves, which is the name of the shape of sliding bearings.

[0003] The sleeve replaces the rolling bearing in the gearbox. Because of its thinner wall thickness, the overall volume of the gearbox will be reduced, and the cost reduction is also obvious. At the same time, the sleeve itself is not only cheaper than the rolling bearing, but also under the condition of oil lubrication, fluid dynamic lubrication will be formed between the shaft and the sleeve, thus forming an oil film between the shaft and the bearing, so that the shaft and the sleeve are not in direct contact, achieving a long-term non-wear effect and extending the service life of the shaft.

[0004] However, wear always exists, and wind power gearboxes are often located outdoors at high altitudes, making maintenance difficult. The most important thing is that it is difficult for users to know the degree of wear of the sleeve. The best option for the equipment is to know the degree of wear of the bearings used and to notify customers when the life of the bearings is about to end, so that customers can replace the bearings in time, thereby minimizing losses. Summary of the invention

[0005] In view of this, the present invention provides a sliding bearing with a wear control function to solve the above problems.

[0006] A sliding bearing with a wear control function, comprising a substrate layer, a lubricating conductive layer group arranged on the substrate layer, a wire group electrically connected to the lubricating conductive layer group, a signal converter electrically connected to the wire group, a signal display electrically connected to the signal converter, and a power supply component for providing power to the lubricating conductive layer group, the signal converter, and the signal display. The substrate layer is made of a metal material. The lubricating conductive layer group comprises at least one dielectric coating fixedly arranged on the substrate layer, and at least one conductive coating fixedly arranged on the dielectric coating. The dielectric coating is located between the conductive coating and the substrate layer. The wire group has at least two groups. One of the at least two wire groups is electrically connected to both ends of the substrate layer, and the remaining wire group is electrically connected to both ends of the conductive coating. The signal converter is used to record the changes of the electrical signal output by the wire group, process it, and transmit the processed information to the signal display. The signal display is used to display the signal from the signal converter in a timely manner.

[0007] Furthermore, the substrate layer is a copper plate or a copper alloy plate.

[0008] Further, when the lubricating conductive layer group includes multiple layers of the dielectric coating and the conductive coating, the multiple layers of the dielectric coating and the conductive coating are alternately arranged, and the conductive coating is located at the outermost side in the radial direction of the sliding bearing.

[0009] Furthermore, electrical contacts are welded on the substrate layer or the conductive coating, and the wire group is electrically connected to the electrical contacts.

[0010] Furthermore, the wire group is electrically connected to two axial ends of the substrate layer or the conductive coating.

[0011] Furthermore, the wire group is electrically connected to two ends of the cross section of the lubricating bearing along the axial direction.

[0012] Furthermore, when the wire group is electrically connected to the two ends of the axial cross section of the lubricating bearing, the lubricating bearing is a rolled bearing, and its two ends along the circumferential direction are electrically connected to the two terminal ends of the wire group.

[0013] Further, the conductive coating is made of copper or a copper-based alloy.

[0014] Furthermore, the signal converter is used to record the change of the voltage value or the current value from the electric wire group and convert the change of the voltage value or the current value into a digital signal.

[0015] Compared with the prior art, the sliding bearing with wear monitoring function provided by the present invention is provided with a lubricating conductive layer group on the substrate layer and a wire group for the substrate layer and the lubricating conductive layer group. When the power supply component provides power, the current can form a loop between the power supply component, the wire group and the substrate layer or the lubricating conductive layer group. During use, when the substrate layer or the lubricating conductive layer group is worn, the resistance value of the substrate layer or the lubricating conductive layer group will change, thereby causing a change in the voltage value or the current value, and the change can be recorded and converted by the signal converter. As the substrate layer or the lubricating conductive layer group is worn more severely, the greater the change in its resistance value, the greater the change in the voltage value or the current value, until the change value is greater than the preset value, it will be displayed or alarmed by the signal display, at which time the user can know that the life of the lubricating conductive layer group or the substrate layer of the self-lubricating bearing is about to end, and the next step such as replacement or maintenance is required. The signal converter and the signal display can be set remotely, so that the user can remotely monitor the wear process of the lubricating conductive layer group or the substrate layer, so that the customer can replace the bearing in time to minimize the loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic structural diagram of a sliding bearing with wear control function provided by the present invention. DETAILED DESCRIPTION

[0017] The specific embodiments of the present invention are further described in detail below. It should be understood that the description of the embodiments of the present invention herein is not intended to limit the protection scope of the present invention.

[0018] like Figure 1 As shown, it is a schematic diagram of the structure of a sliding bearing with a wear control function provided by the present invention. The sliding bearing with a wear control function includes a substrate layer 10, a lubricating conductive layer group 20 arranged on the substrate layer 10, a wire group 30 electrically connected to the lubricating conductive layer group 20, a signal converter 40 electrically connected to the wire group 30, a signal display 50 electrically connected to the signal converter 40, and a power supply component 60 for providing power to the lubricating conductive layer group 20, the signal converter 40, and the signal display 50. It can be imagined that the sliding bearing with a wear control function also includes some other functional modules, such as an assembly component for assembling the sliding bearing, an electrical connection component, etc., which are well known to those skilled in the art and will not be described in detail here.

[0019] The substrate layer 10 is a bearing layer, which can be a copper plate or a copper alloy plate, and its thickness can be set according to actual needs. The substrate layer 10 itself is a prior art and will not be described in detail here.

[0020] The lubricating conductive layer group 20 can be fixedly arranged on the substrate layer 10 by sintering or bonding. The lubricating conductive layer group 20 includes at least one dielectric coating 21 fixedly arranged on the substrate layer 10, and at least one conductive coating 22 fixedly arranged on the dielectric coating 21. At the same time, when the lubricating conductive layer group 20 includes multiple layers of the dielectric coating 21 and the conductive coating 22, the multiple layers of the dielectric coating 21 and the conductive coating 22 should be arranged alternately, and the conductive coating 22 is located at the outermost side along the radial direction of the sliding bearing. The dielectric coating 21 is made of a non-conductive material, such as a polymer material such as polytetrafluoroethylene or molybdenum disulfide (MoS2). The conductive coating 22 can be made of copper or a copper-based alloy. Both the dielectric coating 21 and the conductive coating 22 can be arranged on the corresponding layer material by a coating process. Specifically, it can be understood that the dielectric coating 21 can be coated on the substrate layer 10, or it can be coated on the dielectric coating 21 when the conductive coating 22 has multiple layers. The conductive coating 22 is coated on the dielectric coating 21 .

[0021] The wire group 30 has at least two groups. One of the at least two wire groups 30 is electrically connected to the two ends of the substrate layer 10, and the remaining wire group 30 is electrically connected to the two ends of the conductive coating 22. It can be imagined that in order to ensure that the wire group 30 can be stably connected to the substrate layer 10 or the conductive coating 22, an electrical contact is welded on the substrate layer 10 or the conductive coating 11, and the electrical contact can be a tin material. The two ends of the substrate layer 10 or the conductive coating 22 for electrically connecting the wire group 30 can be the axial ends of the lubricating bearing, or can be the two ends of the cross section of the lubricating bearing along the axial direction, such as Figure 1 As shown. When the wire group 30 is electrically connected to the two ends of the cross section of the lubricating bearing along the axial direction, the lubricating bearing should be a rolled bearing, and its two ends along the circumferential direction are electrically connected to the two terminal heads of the wire group 30. The wire group 30 also includes a connector 31, which is used to combine multiple wires into one wire to facilitate the transmission of data and energy. In this embodiment, since there are two layers of conductive coating 22 and one substrate layer 10, there are three positive wires and three negative wires. Therefore, the connector 31 is required to merge the three positive wires and the three negative wires into one positive wire and one negative wire, respectively, to facilitate electrical connection with the power supply component 60 and the signal converter 40.

[0022] The signal converter 40 is electrically connected to the wire group 30, and is used to record the changes of the electrical signal measured by the wire group 30, process and transmit the processed information to the signal display 50. The signal converter 40 can be an analog-to-analog converter, so it is a prior art and will not be described in detail here.

[0023] The signal display 50 itself is also a prior art, which is used to timely display the signal from the signal converter 40. Of course, it is conceivable that the signal display 50 should be located in the monitoring room for remote monitoring. In addition, it is understandable that the signal display 50 can be accompanied by a reminder device such as an alarm device to alarm and remind the user when the wear degree of the lubricated bearing reaches a preset value.

[0024] The power supply assembly 60 is used to provide power to the lubricating conductive layer group 20, the signal converter 40, and the signal display 50. That is, when the power supply assembly 60 outputs power, the current will flow through the substrate layer 10, the lubricating conductive layer group 20, the signal converter 40, and the signal display 50 in sequence, so that the monitoring function of the entire sliding bearing can be implemented.

[0025] During operation, the lubricating bearing sleeve is arranged on a shaft, and at the beginning of use, the power supply assembly 60 starts to supply power. When the lubricating bearing is in use, the conductive coating 22 is worn, so that the circuit parameters of the conductive coating 22 will change. This change is mainly caused by the wear of the conductive coating 22, because with the wear, the resistance value of the conductive coating 22 will change, thereby causing a change in the voltage value or the current value, and the change can be recorded and converted by the signal converter 40. As the conductive coating 22 is worn more severely, the greater the change in its resistance value, the greater the change in the voltage value or the current value, until the change value is greater than the preset value, an alarm will be issued. Of course, it is conceivable that the resistance change value of the conductive coating 22 is the resistance value when the conductive coating 22 is not worn minus the resistance value when measured. When the conductive coating 22 is worn out, the substrate layer 10 will be worn. The wear monitoring of the substrate layer 10 is the same as the wear monitoring of the conductive coating 22, which will not be repeated here.

[0026] Compared with the prior art, the sliding bearing with wear monitoring function provided by the present invention is provided with a lubricating conductive layer group 20 on the substrate layer 10 and a wire group 30 for the substrate layer 10 and the lubricating conductive layer group 20. When the power supply assembly 60 provides power, the current can form a loop between the power supply assembly 60, the wire group 30 and the substrate layer 10 or the lubricating conductive layer group 20. During use, when the substrate layer 10 or the lubricating conductive layer group 20 is worn, the resistance value of the substrate layer 10 or the lubricating conductive layer group 20 will change, thereby causing a change in the voltage value or the current value, and the change can be recorded and converted by the signal converter 40. As the substrate layer 10 or the lubricating conductive layer group 20 is worn more severely, the greater the change in its resistance value, thereby causing a greater change in the voltage value or the current value, until the change value is greater than the preset value, it will be displayed or alarmed by the signal display 50, and at this time the user can know that the life of the lubricating conductive layer group 20 or the substrate layer 10 of the self-lubricating bearing is about to end, and the next step such as replacement or repair is required. The signal converter 40 and the signal display 50 can be remotely set so that the user can remotely monitor the wear process of the lubricating conductive layer group 20 or the substrate layer 10, so that the customer can replace the bearing in time to minimize the loss.

[0027] The above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modification, equivalent substitution or improvement within the spirit of the present invention is included in the scope of the claims of the present invention.

Claims

1. A sliding bearing with wear control function, characterized in that: The sliding bearing with wear control function includes a substrate layer, a lubricating conductive layer group arranged on the substrate layer, a wire group electrically connected to the lubricating conductive layer group, a signal converter electrically connected to the wire group, a signal display electrically connected to the signal converter, and a power supply component for providing power to the lubricating conductive layer group, the signal converter, and the signal display. The substrate layer is made of a metal material. The lubricating conductive layer group includes at least one dielectric coating fixedly arranged on the substrate layer, and at least one conductive coating fixedly arranged on the dielectric coating, the dielectric coating is located between the conductive coating and the substrate layer. The wire group has at least two groups, one of the at least two wire groups is electrically connected to the two ends of the substrate layer, and the remaining wire group is electrically connected to the two ends of the conductive coating. The signal converter is used to record the changes of the electrical signal output by the wire group, process and transmit the processed information to the signal display, and the signal display is used to timely display the signal from the signal converter.

2. The sliding bearing with wear control function according to claim 1, characterized in that: The substrate layer is a copper plate or a copper alloy plate.

3. The sliding bearing with wear control function according to claim 1, characterized in that: When the lubricating conductive layer group includes multiple layers of the dielectric coating and the conductive coating, the multiple layers of the dielectric coating and the conductive coating are alternately arranged, and the conductive coating is located at the outermost side in the radial direction of the sliding bearing.

4. The sliding bearing with wear control function according to claim 1, characterized in that: Electric contacts are welded on the substrate layer or the conductive coating, and the wire group is electrically connected to the electric contacts.

5. The sliding bearing with wear control function according to claim 1, characterized in that: The conductive wire group is electrically connected to two axial ends of the substrate layer or the conductive coating.

6. The sliding bearing with wear control function according to claim 1, characterized in that: The wire group is electrically connected to two ends of the cross section of the lubricating bearing along the axial direction.

7. The sliding bearing with wear control function according to claim 1, characterized in that: When the wire group is electrically connected to the two ends of the cross section of the lubricating bearing along the axial direction, the lubricating bearing is a rolled bearing, and its two ends along the circumferential direction are electrically connected to the two terminal ends of the wire group.

8. The sliding bearing with wear control function according to claim 1, characterized in that: The conductive coating is made of copper or a copper-based alloy.

9. The sliding bearing with wear control function according to claim 1, characterized in that: The signal converter is used to record the change of the voltage value or the current value from the electric wire group and convert the change of the voltage value or the current value into a digital signal.

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