CN113915241B

CN113915241B - Bearing structure

Info

Publication number: CN113915241B
Application number: CN202111263864.9A
Authority: CN
Inventors: 李学瑞; 李炯利; 罗圭纳; 王刚; 于公奇; 王旭东
Original assignee: Beijing Graphene Technology Research Institute Co Ltd
Current assignee: Beijing Graphene Technology Research Institute Co Ltd
Priority date: 2021-10-27
Filing date: 2021-10-27
Publication date: 2023-10-03
Anticipated expiration: 2041-10-27
Also published as: CN113915241A

Abstract

The application relates to a bearing structure, which comprises a bearing main body, wherein a main bearing and an auxiliary bearing form the bearing main body, a main bearing outer ring and a main bearing inner ring are assembled in a relative rotation way through a main bearing retainer, a first magnetic body and a first rolling body are assembled in the main bearing retainer, the side wall of the main bearing outer ring is provided with a temperature sensing structure, the auxiliary bearing comprises an auxiliary bearing outer ring and an auxiliary bearing inner ring, the auxiliary bearing outer ring and the auxiliary bearing inner ring are assembled in a relative rotation way through an auxiliary bearing retainer, a second magnetic body and a second rolling body are assembled in the auxiliary bearing retainer, the auxiliary bearing outer ring is coaxially assembled with the main bearing outer ring, the auxiliary bearing inner ring is coaxially assembled with the main bearing inner ring, a magnetic field is formed between the first magnetic body and the second magnetic body, a cutting coil is assembled on the main bearing outer ring, and the main bearing retainer is connected with the main bearing inner ring. The bearing structure adopts a wireless passive mode, and can normally collect temperature information of the bearing inner ring under the conditions of no external power supply and no physical connection.

Description

Bearing structure

Technical Field

The application relates to the technical field of bearings, in particular to a bearing structure.

Background

The temperature and the strain of the bearing are two important parameters capable of reflecting the working state of the bearing, and the real-time monitoring of the temperature and the strain of the bearing is helpful for knowing the working state of the bearing, so that timely adjustment is performed, and unnecessary losses caused by misoperation, overload operation and other conditions are avoided.

The monitoring methods commonly used at present are internal implantation type and external hanging type. The built-in type is to make a slot, a hole, modify the size and the like in the bearing, and the monitoring sensor is implanted in the bearing, which has the defects that the mounting space of the monitoring sensor is limited, the stress form of the bearing is easily influenced by the change of the bearing structure, the service life of the bearing is further influenced, the wiring is difficult, the working environment of the monitoring sensor is bad and the like, such as high temperature, greasy dirt, friction and other environments.

The externally hung type is to install the monitoring sensor at the position near the bearing and on the peripheral parts, for example, the monitoring sensor is installed on the bearing seat or on the structure close to the bearing seat, and the disadvantage is that the position where the bearing breaks down is far away from the installation position of the monitoring sensor, and the measured signal can be affected by environmental noise and deviate from a true value due to the fact that the monitoring sensor is far away from a signal source, so that the measurement precision is poor, and a power supply for supplying power to the monitoring sensor needs to be installed near the bearing and is all required to be attached around the bearing, so that the overall size of the bearing can be changed, and the original design strength is changed.

Disclosure of Invention

Based on this, it is necessary to provide a bearing structure against the problem of difficulty in mounting the power supply.

The present application provides a bearing structure comprising:

the main bearing comprises a main bearing outer ring and a main bearing inner ring, the main bearing outer ring and the main bearing inner ring are assembled in a relative rotation mode through a main bearing retainer, a first magnetic body and a first rolling body are assembled in the main bearing retainer, a temperature sensing structure is arranged on the side wall of the main bearing outer ring, and the temperature sensing structure is configured to acquire temperature information of the main bearing;

the auxiliary bearing comprises an auxiliary bearing outer ring and an auxiliary bearing inner ring, the auxiliary bearing outer ring and the auxiliary bearing inner ring are assembled in a relative rotation mode through an auxiliary bearing retainer, a second magnetic body and a second rolling body are assembled in the auxiliary bearing retainer, the auxiliary bearing outer ring and the main bearing outer ring are assembled coaxially, the auxiliary bearing inner ring and the main bearing inner ring are assembled coaxially, and a magnetic field is formed between the first magnetic body and the second magnetic body;

the cutting coil is assembled on the main bearing outer ring, the main bearing retainer is connected with the main bearing inner ring, the cutting coil is configured to be used for cutting magnetic induction lines of the magnetic field to generate electric energy when the main bearing outer ring and the main bearing inner ring rotate relatively, and the electric energy is configured to be used for supplying power to at least the temperature sensing structure.

In one embodiment, the bearing structure further comprises:

the signal processor is arranged on the outer ring of the main bearing and is electrically connected with the temperature sensing structure and used for acquiring the temperature information;

the signal transmitter is arranged on the outer ring of the main bearing and is electrically connected with the signal processor and used for wirelessly transmitting the temperature information to a receiving end;

the electrical energy is further configured to power the signal processor and/or signal transmitter.

In one embodiment, the bearing structure further comprises:

the annular baffle cover is assembled on the inner side face of the main bearing outer ring and is positioned between the main bearing outer ring and the main bearing inner ring, and the cutting coil is wound on at least one part of the area of the annular baffle cover along the circumferential direction of the annular baffle cover.

In one embodiment, the length of the annular flap wound by the cutting coil is less than or equal to half the circumference of the annular flap.

In one embodiment, the signal processor is arc-shaped and is assembled on the annular blocking cover along the circumferential direction of the annular blocking cover.

In one embodiment, the signal transmitter is a signal transmitting antenna.

In one embodiment, the first rolling bodies are assembled in the main bearing cage in a rolling manner along the circumferential direction of the main bearing cage, the first magnetic bodies are arranged between adjacent first rolling bodies, and the second magnetic bodies are the same in number as the first magnetic bodies and are symmetrical to each other between the main bearing cage and the auxiliary bearing cage.

In one embodiment, the circumference of the main bearing cage is divided into a first arc-shaped area and a second arc-shaped area, the length of the first arc-shaped area is smaller than that of the second arc-shaped area, and the first magnetic bodies are distributed in the first arc-shaped area.

In one embodiment, a first mass compensation body is further mounted in the main bearing cage, the first mass compensation body being arranged between adjacent first rolling bodies, the first mass compensation body being distributed in the second arc-shaped region.

In one embodiment, a second mass compensation body is also fitted in the auxiliary bearing cage, the second mass compensation body being the same in number as the first mass compensation body and being symmetrical to each other between the main bearing cage and the auxiliary bearing cage.

In the bearing structure, the cutting coil can cut the magnetic induction line of the magnetic field to generate electric energy when the main bearing outer ring and the main bearing inner ring rotate relatively, the generated electric energy can be used for supplying power to the temperature sensing structure, and then a power supply is formed, a wireless passive power supply mode can be formed, the temperature information of the bearing inner ring can be normally acquired under the condition that external power supply and no physical connection line are not needed, and wireless monitoring of the bearing state is realized.

Drawings

FIG. 1 is an assembled schematic view of a bearing structure according to an embodiment of the present application;

FIG. 2 is a schematic diagram of a sensing groove according to an embodiment of the present application;

FIG. 3 is a schematic view of a sensing groove according to another embodiment of the present application;

FIG. 4 is a schematic view of a sensing groove according to another embodiment of the present application;

FIG. 5 is an exploded view of a layered structure of an insulating layer, a sensitive coating, an electrode layer, and a protective layer according to one embodiment of the present application;

FIG. 6 is a schematic diagram showing an assembly structure of a signal processor, a signal transmitter, a cutting coil and an annular shield according to an embodiment of the present application;

FIG. 7 is a first directional cross-sectional view of a main bearing provided in accordance with one embodiment of the present application;

FIG. 8 is a second directional cross-sectional view of a main bearing provided in accordance with one embodiment of the present application;

FIG. 9 is a first directional cross-sectional view of an auxiliary bearing provided in one embodiment of the present application;

FIG. 10 is a second directional cross-sectional view of an auxiliary bearing provided in accordance with one embodiment of the present application;

FIG. 11a is a schematic diagram of a mask having a pattern of sensitive recesses according to an embodiment of the present application;

FIG. 11b is a schematic diagram of a mask having a pattern of sensitive gate trenches according to an embodiment of the present application;

fig. 11c is a schematic diagram of a mask plate with an electrode groove pattern according to an embodiment of the present application.

Reference numerals:

100. a bearing body; 200. a sensitive coating; 300. a signal processor; 400. a signal transmitter; 500. cutting the coil; 600. an annular blocking cover; 700. a rotating shaft; 800. a shaft sleeve; 900. an end cap;

110. a bearing inner ring; 120. a bearing outer ring; 130. a bearing holder; 140. a gasket;

210. a sensitive groove; 220. polishing the area; 230. an insulating layer;

240. an electrode layer; 250. a protective layer;

211. an electrode groove; 212. a sensitive gate groove;

251. an electrode protection layer; 252. a sensitive gate protection layer;

111. a main bearing inner ring; 112. an auxiliary bearing inner ring;

121. an outer ring of the main bearing; 122. an auxiliary bearing outer ring;

131. a main bearing retainer; 132. an auxiliary bearing retainer;

133. a first magnetic body; 134. a first rolling element; 135. a first mass compensation body;

136. a second magnetic body; 137. a second rolling element; 138. a second mass compensation body;

910. an oil seal; 920. and an oil hole.

Detailed Description

In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the application, whereby the application is not limited to the specific embodiments disclosed below.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Referring to fig. 1 to 10, the present application provides a bearing structure including a bearing main body 100, a main bearing and an auxiliary bearing constituting the bearing main body 100, a main bearing inner ring 111 and an auxiliary bearing inner ring 112 constituting a bearing inner ring 110, a main bearing outer ring 121 and an auxiliary bearing outer ring 122 constituting a bearing outer ring 120, the main bearing including a main bearing outer ring 121 and a main bearing inner ring 111, the main bearing outer ring 121 and the main bearing inner ring 111 being relatively rotatably assembled by a main bearing cage 131, the main bearing cage 131 being assembled with a first magnetic body 133 and a first rolling body 134 therein, a side wall of the main bearing outer ring 121 being provided with a temperature sensing structure configured to acquire temperature information of the main bearing, the auxiliary bearing including an auxiliary bearing outer ring 122 and an auxiliary bearing inner ring 112, the auxiliary bearing outer ring 122 and the auxiliary bearing inner ring 112 are assembled by relative rotation of the auxiliary bearing retainer 132, the auxiliary bearing retainer 132 is assembled with a second magnetic body 136 and a second rolling body 137, the auxiliary bearing outer ring 122 is assembled coaxially with the main bearing outer ring 121, the auxiliary bearing inner ring 112 is assembled coaxially with the main bearing inner ring 111, a magnetic field is formed between the first magnetic body 133 and the second magnetic body 136, the bearing structure further comprises a cutting coil 500, the surface of the cutting coil 500 is insulated, such as wrapping an insulating outer layer, the cutting coil 500 is assembled on the main bearing outer ring 121, the main bearing retainer 131 is connected with the main bearing inner ring 111, the cutting coil 500 is configured to cut a magnetic induction line of the magnetic field to generate electric energy when the main bearing outer ring 121 and the main bearing inner ring 111 relatively rotate, the electric energy is configured to supply power to at least the temperature sensing structure, thereby forming a power supply, and the temperature information of the bearing inner ring 110 can be normally collected under the condition that no external power supply and no physical connection are needed by adopting a wireless passive mode, so that the wireless monitoring of the bearing state is realized.

The main bearing outer ring 121, the main bearing inner ring 111 and the main bearing retainer 131 have the same size and structure as the auxiliary bearing outer ring 122, the auxiliary bearing inner ring 112 and the auxiliary bearing retainer 132, so that the main bearing and the auxiliary bearing can keep synchronous rotation operation and realize mutual symmetry in structure, wherein the auxiliary bearing can be smaller in thickness than the main bearing, the main bearing is used for bearing load during operation, the auxiliary bearing is not stressed and loaded during operation, and the auxiliary bearing is used for assembling the second magnetic body 136, so that the second magnetic body 136 and the first magnetic body 133 form a magnetic field for cutting by the cutting coil 500. The auxiliary bearing outer ring 122 of the auxiliary bearing may be reserved with a pin hole, which may be used to assemble the auxiliary bearing on the bearing housing by using a key pin, one side of the auxiliary bearing inner ring 112 of the auxiliary bearing may be adjacent to the main bearing, and the other side of the auxiliary bearing inner ring 112 may be fixed on the rotation shaft 700 by a nut. A spacer 140 may be assembled between the main bearing and the auxiliary bearing, and the spacer 140 may be disposed between the main bearing outer ring 121 and the auxiliary bearing outer ring 122, or may be disposed between the auxiliary bearing inner ring 112 and the main bearing inner ring 111.

When the bearing structure is assembled with the rotating shaft 700, the main bearing outer ring 121 and the auxiliary bearing outer ring 122 are used for being assembled on the bearing seat, so that the main bearing outer ring 121 and the auxiliary bearing outer ring 122 are relatively static, the main bearing inner ring 111 and the auxiliary bearing inner ring 112 are assembled with the rotating shaft 700 and synchronously rotate along with the rotating shaft 700, and in the rotating state in the working process, the cutting coil 500 always keeps a static state, but not a high-speed rotating state, so that the cutting coil 500 can keep a stable and good working state, the rotation of the rotating shaft 700 can drive the main bearing inner ring 111 and the bearing inner ring 110 to synchronously rotate, and simultaneously drive the main bearing retainer 131 and the auxiliary bearing retainer 132 to synchronously rotate, so that the magnetic fields generated by the first magnetic body 133 and the second magnetic body 136 synchronously rotate, and the magnetic fields rotate, so that the relative rotation is formed by the magnetic fields, the cutting coil 500 is allowed to make a movement of cutting magnetic induction line in the magnetic fields, and the generated current can be used as electric energy for supplying power to the temperature sensing structure, for example, when the temperature sensing structure is a common temperature sensor.

The assembly of the cutting coil 500 on the main bearing outer ring 121 may be a direct assembly or an indirect assembly, for example, if the cutting coil 500 is a self-supporting structure with a certain hardness, the cutting coil 500 may be directly assembled on the main bearing outer ring 121 and assembled at an angle capable of cutting magnetic induction lines in a magnetic field, those skilled in the art may configure the assembly as required, or the cutting coil 500 may be indirectly assembled on the main bearing outer ring 121 by using other components, for example, the bearing structure further includes an annular stop cap 600, the annular stop cap 600 is assembled on an inner side surface of the main bearing outer ring 121 and located between the main bearing outer ring 121 and the main bearing inner ring 111, and the cutting coil 500 is wound on at least a part of the area of the annular stop cap 600 along the circumferential direction of the annular stop cap 600.

The annular retaining cover 600 and the main bearing outer ring 121 can be detachably assembled relatively in a clamping and bonding mode, and also can be fixedly assembled in a welding mode, for example, a mounting groove can be formed in the main bearing outer ring 121, the mounting groove is an annular groove, the annular retaining cover 600 is structurally suitable for being mounted, and the annular retaining cover 600 is inserted into the mounting groove and is fixed by using a buckle. When the annular shield 600 is mounted, since the annular shield 600 is disposed between the main bearing outer ring 121 and the main bearing inner ring 111 and is disposed between the main bearing outer ring 121 and the main bearing inner ring 111, the annular shield 600 shields the main bearing retainer 131, and a certain gap is required to be formed between the first magnetic body 133, the first rolling body 134, and the annular shield 600 to prevent mutual interference.

In one embodiment, the length of the annular shield 600 wound by the cutting coil 500 is less than half of the circumference of the annular shield 600, for example, when the cutting coil 500 is wound around the annular shield 600, it may cover one third, one quarter, etc. of the annular shield 600, wherein the length of the annular shield 600 covered by the cutting coil 500 is from the starting position to the important position of the cutting coil 500 wound around the annular shield 600, and is calculated as the cover of the annular shield 600 between the starting position and the important position, although the cutting coil 500 does not actually cover the annular shield 600.

In one embodiment, the signal processor 300 is arc-shaped and is mounted on the annular barrier 600 in the circumferential direction of the annular barrier 600. The arcuate signal processor 300 utilizes exactly the annular configuration of the annular shield 600, so that the signal processor 300 itself can have a sufficient size and area, and can be assembled on the annular shield 600 in an arcuate manner, conforming to the circular configuration of the bearing.

In one embodiment, the signal transmitter 400 is a signal transmitting antenna. The signal transmitting antenna has a slim structure, and can be assembled in a narrow space, for example, the signal transmitting antenna can transmit temperature information after penetrating out from the oil hole 920 of the oil seal 910 and transmit the temperature information to the receiving end in a wireless manner, or can transmit temperature information after penetrating out from the pin hole reserved on the outer ring 122 of the auxiliary bearing and transmit the temperature information to the receiving end in a wireless manner.

In one embodiment, the first rolling bodies 134 are rollingly fitted in the main bearing cage 131 in the circumferential direction of the main bearing cage 131, the first magnetic bodies 133 are disposed between adjacent first rolling bodies 134, and the second magnetic bodies 136 are the same in number as the first magnetic bodies 133 and are symmetrical to each other between the main bearing cage 131 and the auxiliary bearing cage 132. When the first magnetic body 133 and the second magnetic body 136 are assembled to the auxiliary bearing holder 132 and the main bearing holder 131, respectively, the first magnetic body 133 and the second magnetic body 136 are ensured to have opposite magnetic poles so that a stable magnetic field can be formed.

In one embodiment, the circumference of the main bearing cage 131 is divided into a first arc region and a second arc region, the length of the first arc region is smaller than or equal to the length of the second arc region, and the first magnetic bodies 133 are distributed in the first arc region.

In one embodiment, a first mass compensation body 135 is further mounted in the main bearing cage 131, the first mass compensation body 135 is disposed between adjacent first rolling bodies 134, and the first mass compensation body 135 is distributed in the second arc-shaped region. The mass and the size of the first mass compensating bodies 135 can be kept the same as those of the first magnetic bodies 133, so that a dynamic balance effect is achieved in the bearing rotation process, and if the length of the first arc-shaped area is equal to that of the second arc-shaped area, the number of the first mass compensating bodies 135 can be kept the same as that of the first magnetic bodies 133, so that the first mass compensating bodies 135 and the first magnetic bodies 133 form a symmetrical distribution structure, and a certain gap is formed between the first mass compensating bodies 135 and the annular baffle cover 600 to prevent mutual interference. Similarly, the auxiliary bearing holder 132 is further provided therein with a second mass compensation body 138, and the second mass compensation body 138 has the same function as the first mass compensation body 135, so that the bearings play a role in dynamic balance during rotation, and the second mass compensation bodies 138 may be the same as the first mass compensation bodies 135 in number and are symmetrically disposed between the main bearing holder 131 and the auxiliary bearing holder 132, and distributed according to the states of the first mass compensation bodies 135 and the first magnetic bodies 133.

Besides a temperature sensor capable of directly acquiring temperature information, the temperature sensing structure may be formed in other manners, for example, a sensitive coating 200 sensitive to temperature is adopted, the sensitive coating 200 generates corresponding changes of corresponding parameters such as resistance parameters after temperature changes, so that the bearing structure further comprises a signal processor 300 and a signal transmitter 400, the signal processor 300 can process the resistance parameters or other parameters of the sensitive coating 200 and convert the resistance parameters or other parameters into temperature information capable of being used for sensing temperature, the signal processor 300 is arranged on the main bearing outer ring 121, the signal processor 300 is electrically connected with the temperature sensing structure and used for acquiring the temperature information, the signal transmitter 400 is arranged on the main bearing outer ring 121, the signal transmitter 400 is electrically connected with the signal processor 300 and used for wirelessly transmitting the temperature information to a receiving end, and the electric energy is also configured to supply power to the signal processor 300 and/or the signal transmitter 400, and the receiving end can be used for remotely acquiring the working temperature state of the bearing by a worker, such as a remote control platform.

Specifically, an embodiment of the present application provides a bearing structure, the bearing structure includes a bearing main body 100, a signal processor 300, a signal transmitter 400 and a power supply, the bearing main body 100 includes a bearing inner ring 110 and a bearing outer ring 120, the bearing inner ring 110 and the bearing outer ring 120 are assembled by relative rotation of a bearing holder 130, at least a part of a region of at least one side wall of the bearing outer ring 120 is formed with at least one layer of sensitive coating 200, the sensitive coating 200 is provided with a sensitive groove 210, the sensitive groove 210 is configured to generate corresponding resistance change along with a temperature change, the signal processor 300 is disposed on the bearing outer ring 120, the signal processor 300 is electrically connected with the sensitive groove 210, the signal transmitter 400 is configured to generate temperature information of the bearing main body 100 according to the resistance change of the sensitive groove 210, the signal transmitter 400 is disposed on the bearing outer ring 120, the signal transmitter 400 is electrically connected with the signal processor 300, and is configured to wirelessly send the temperature information to a receiving end, the power supply is disposed on the bearing outer ring 120, and the signal processor 300 and/or the signal transmitter 400 is configured to be provided with a passive power supply instead of the power supply.

The bearing structure does not need to damage or change the structure of the bearing structure, the original design structure and strength of the bearing structure are guaranteed, the sensitive coating 200 capable of acquiring temperature information in real time is integrated on the bearing outer ring 120, the working state of the bearing structure can be monitored in a short distance in situ, the real measured value of the bearing is acquired, the loss caused by signal transmission is reduced, and the difficult problems of sensor installation, wiring and the like caused by the fact that the space is narrow and small are fully solved.

When the bearing structure is assembled with the rotating shaft 700, the bearing outer ring 120 is used for being assembled on the bearing seat, so that the bearing outer ring 120 is kept relatively static, the bearing inner ring 110 is assembled with the rotating shaft 700 and synchronously rotates along with the rotating shaft 700, and in a rotating state in the working process, the signal processor 300, the signal transmitter 400 and the power supply are kept in a static state all the time, but not in a high-speed rotating state, and the signal processor 300, the signal transmitter 400 and the power supply can be kept in a stable and good working state. When the rotating shaft 700 rotates, the bearing structure is deformed or temperature-changed due to the load or moment from the rotating shaft 700 and the bearing seat, at this time, the sensitive groove 210 of the bearing outer ring 120 is deformed, the deformation of the sensitive groove 210 causes the change of resistance, and then the change of voltage or current is generated, the change signal of the voltage or current caused by the change of resistance is transmitted to the signal processor 300, and the temperature information is formed after being processed by filtering, amplifying and the like and is transmitted to the signal transmitter 400, and then the temperature is transmitted to the receiving end in a wireless mode, so that the monitoring of the temperature stress of the bearing can be completed.

The side wall of the bearing outer race 120 is provided with a polished area 220, and the sensitive coating 200 is directly or indirectly formed on the polished area 220, for example, an insulating layer 230 is formed on the polished area 220, and the sensitive coating 200 is formed on the insulating layer 230 and indirectly formed on the polished area 220 through the insulating layer 230. The sensing groove 210 includes two electrode grooves 211 and a sensing gate groove 212 connected between the two electrode grooves 211, and an electrode layer 240 is formed in the electrode groove 211. The material of the sensitive coating 200 can be graphene metal composite film material, and is formed after processes such as sputtering lithography and stripping, and the graphene and metal have different positive and negative resistance temperature coefficients, so that the material with the resistance temperature coefficient close to zero can be formed, and the sensitive coating 200 can realize radial stress measurement without being influenced by temperature.

The sensitive coating 200 has a protective layer 250 formed thereon, and the protective layer 250 includes an electrode protective layer 251 covering the electrode layer 240, and a sensitive gate protective layer 252 covering the sensitive gate trench 212. An adhesive layer is formed between adjacent layers of the polishing layer, the insulating layer 230, the sensitive coating 200 and the protective layer 250, and may be selectively disposed between the polishing layer and the insulating layer 230, between the insulating layer 230 and the sensitive coating 200, or between the sensitive coating 200 and the protective layer 250, for enhancing a bonding force between the adjacent layers.

In one embodiment, the sensitive coating 200 is formed by laminating two layers, each layer is provided with the sensitive grooves 210, the sensitive gate grooves 212 of the two sensitive grooves 210 formed on the two layers are mutually perpendicular, the two layers of the sensitive coating 200 laminated on the position belong to two structures capable of performing temperature detection, the sensitive gate grooves 212 in the two sensitive coatings 200 are mutually perpendicular, and the strains can be equal and opposite in size and direction during temperature detection, so that errors caused by temperature to the strains can be counteracted, and the strains can be independently measured, wherein the strains are used for measuring radial strains.

In one embodiment, two sensitive grooves 210 are formed in the sensitive coating 200, the sensitive grating grooves 212 of the two sensitive grooves 210 are mutually matched to form an interdigital structure, i.e. a structure similar to the structure of mutually inserting fingers of two hands, and because the structure of the sensitive grating grooves 212 is a right-angle roundabout structure, a space can be formed, so that the mutually inserting of the sensitive grating grooves 212 in the two sensitive coatings 200 into the space of each other can form an interdigital structure, the sensitive grating grooves 212 of the two interdigital structures are not intersected at the same time, and the positions of the two sensitive grating grooves 212 are as close as possible, for example, the gap is not more than 0.1 μm.

The materials of the two sensitive recesses 210 may be the same or different, the sensitive coating 200 is grown by sputtering, thermal evaporation, printing, etc., and the sensitive recesses 210 may be formed by etching, photolithography, etc. When the temperature and stress are measured, the temperature of the surface of the bearing structure changes, if the external force is applied, the surface of the bearing structure also generates strain, at this time, the resistances of the two sensitive grooves 210 on the surface of the bearing structure change, the resistances are caused by the temperature and strain, and if the two sensitive grooves 210 are respectively prepared by using different materials, the corresponding resistance strain coefficients and the resistance temperature coefficients are also different, so that the temperature and the stress of the bearing structure to be measured in the working state can be respectively obtained after decoupling according to the temperature and the stress.

The material of the sensitive coating 200 is graphene metal composite material or metal material, and the graphene material is adopted to form the sensitive coating 200, so that the interference of corresponding variable measurement caused by temperature change can be effectively reduced, an external circuit for temperature compensation is simplified, the resistance temperature coefficient of the existing metal film sensor is higher, the resistance temperature drift coefficient of the metal film can be reduced by preparing the graphene metal composite film sensor, because the resistance of the metal film is increased along with the increase of temperature, and the resistance of the graphene film is reduced along with the increase of temperature, if the two film materials are compounded, the resistance temperature coefficient TCR of the graphene metal composite film sensor can be effectively reduced, thereby reducing the measurement error and improving the measurement precision.

The roughness of the polishing layer is below 200nm, the material of the insulating layer 230 is any one or combination of silicon oxide, silicon nitride and aluminum oxide, the material of the electrode layer 240 is any one or combination of copper, silver and gold, the material of the electrode protection layer 251 is any one or combination of silicon oxide, silicon nitride and aluminum oxide, or the material of the electrode protection layer 251 is an organic resin material, the material of the sensitive gate protection layer 252 is any one or combination of silicon oxide, silicon nitride and aluminum oxide, and the material of the bonding layer is any one of nickel, nickel chromium or chromium.

The thickness of the sensitive coating 200 is 100nm to 1 μm, such as the thickness of the sensitive coating 200 is 100nm, 300nm, 500nm, 800nm, 1 μm, etc., the thickness of the insulating layer 230 is 1 μm to 3 μm, such as the thickness of the insulating layer 230 is 1 μm, 1.5 μm, 2 μm, 2.5 μm, 3 μm, etc., the thickness of the electrode layer 240 is 100nm to 1 μm, such as the thickness of the electrode layer 240 is 100nm, 300nm, 500nm, 800nm, 1 μm, etc., the thickness of the electrode protection layer 251 is 1 μm to 3 μm, such as the thickness of the electrode protection layer 251 is 1 μm, 1.5 μm, 2.5 μm, 3 μm, etc., the thickness of the sensitive gate protection layer 252 is 1 μm, 1.5 μm, 2.5 μm, 3 μm, etc., the thickness of the bonding layer is 90nm, 110nm, 95nm, etc., the thickness of the bonding layer is 90nm, 110nm, etc.

The pattern of the sensitive groove 210 on the sensitive coating 200 is not limited to the above structure, and a person skilled in the art can set the pattern of the sensitive groove 210 to other structural forms according to the requirement, the formation mode of the sensitive groove 210 can be a photolithography process or a non-photolithography process, for example, the structure of each layer can be manufactured by using a mask, as shown in fig. 11a to 11c, a predetermined pattern needs to be formed on the mask, then the mask is attached to the side wall of the bearing, a carbon source grows on the surface of one side with the mask through a radio frequency magnetic control deposition technology to form a pattern with a sensitive gate and an electrode, the radio frequency power can be kept between 30W and 500W, the argon flow rate is between 1SCCm and 200SCCm, the normal temperature growth is carried out, and the pressure is kept between 0.1Pa and 3Pa, and the thickness is between 0.3nm and 1nm. Nickel is grown on the surface of the grown carbon by physical vapor deposition to form a pattern with a sensitive gate and an electrode, the radio frequency power of 30W-500W, the argon flow of 1 SCCm-200 SCCM and the normal temperature can be maintainedGrowing and keeping the pressure at 0.1 Pa-3 Pa and the thickness at 50 nm-100 nm. Carbon is grown on the surface of the grown nickel by physical vapor deposition to form a pattern with a sensitive gate and an electrode, the radio frequency power of 30W-500W, the argon flow of 1 SCCm-200 SCCM can be kept, the growth is carried out at normal temperature, and the pressure of 0.1 Pa-3 Pa and the thickness of 50 nm-100 nm are kept. Vacuum annealing the obtained sample in the sputtering deposition cavity, and maintaining vacuum degree 210 ^-2 ～410 ^-4 The annealing temperature is 350-400 ℃, the heating rate is 1 minute and 15-20 degrees, the heat preservation time is 1 hour, and then the natural cooling is carried out. At this time, after the amorphous carbon layer on the surface of the substrate is catalyzed by the nickel layer at high temperature, a plurality of layers of graphene are separated out between the bearing deposited carbon layer and the nickel layer, and a graphene metal composite film sensitive gate and a film electrode can be formed.

When patterns are obtained by a photoetching method, graphene is prepared on the surface of a copper foil by a heat pipe furnace device, wherein the parameters are that the volume ratio of hydrogen to methane in reaction gas can be 4:1, the reaction temperature can be 800-1200 ℃, the reaction time can be 1 min-1 h, after the preparation is completed and the temperature is reduced, the copper foil is taken out, the surface of the copper foil is coated with photoresist, the graphene on the surface of the copper foil is transferred to the surface of the bonding layer by adopting wet transfer and dried, the graphene which is not protected by the photoresist is exposed by adopting a photoetching method, developed and rinsed by deionized water, the graphene which is not protected by the photoresist is removed by adopting dry etching, and then the photoresist on the surface of the graphene is removed by adopting acetone, so that a graphene pattern is formed. Then, an adhesive layer on the upper layer of the graphene can be grown, and the adhesive layer are respectively positioned on two sides of the graphene, and then a nickel-chromium layer is continuously grown on the adhesive layer.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims

1. A bearing structure, the bearing structure comprising:

2. The bearing structure of claim 1, wherein the bearing structure further comprises:

3. The bearing structure of claim 2, wherein the bearing structure further comprises:

4. A bearing arrangement according to claim 3, wherein the annular shield is wound by the cutting coil less than half the circumference of the annular shield.

5. A bearing arrangement according to claim 3, wherein the signal processor is arcuate and fits over the annular shield in the circumferential direction of the annular shield.

6. The bearing structure of claim 2, wherein the signal transmitter is a signal transmitting antenna.

7. Bearing structure according to any one of claims 1-6, characterized in that the first rolling bodies are rolling-fitted in the main bearing cage in the circumferential direction of the main bearing cage, the first magnetic bodies being arranged between adjacent first rolling bodies, the second magnetic bodies being the same number as the first magnetic bodies and being mutually symmetrical between the main bearing cage and the auxiliary bearing cage.

8. The bearing structure according to claim 7, wherein a circumference of the main bearing holder is divided into a first arc-shaped region and a second arc-shaped region, a length of the first arc-shaped region is smaller than or equal to a length of the second arc-shaped region, and the first magnetic body is distributed in the first arc-shaped region.

9. Bearing structure according to claim 8, wherein a first mass compensation body is further fitted in the main bearing cage, said first mass compensation body being arranged between adjacent first rolling bodies, said first mass compensation bodies being distributed in the second arc-shaped region.

10. Bearing arrangement according to claim 9, characterized in that a second mass compensation body is also fitted in the auxiliary bearing cage, which second mass compensation body is the same as the first mass compensation body in number and is symmetrical to each other between the main bearing cage and the auxiliary bearing cage.