CN113834583A - Bearing device - Google Patents

Abstract

The invention relates to a bearing device, comprising: a bearing (100) including an axial end side member; a temperature measurement module comprising a temperature sensor assembly (400) and an antenna (500), wherein the temperature sensor assembly (400) is arranged at an axial end face of the axial end side member, and the temperature sensor assembly (400) comprises a passive wireless temperature sensor (410), wherein the antenna (500) faces the temperature sensor assembly (400) and is arranged separately from the temperature sensor assembly (400), the antenna (500) is capable of wirelessly acquiring electrical energy by means of a further antenna arranged remote from the bearing (100) and wirelessly supplying electrical energy to the passive wireless temperature sensor (410), and the antenna (500) is capable of wirelessly acquiring temperature information measured by the passive wireless temperature sensor (410) and wirelessly transmitting the temperature information to the further antenna.

Description

Bearing device

Technical Field

The invention relates to the technical field of bearings. The invention relates in particular to a bearing arrangement with a temperature measuring module.

Background

On a cold-rolled production line in the steel industry, in order to ensure the quality of a cold-rolled steel coil, some rolling mills adopt oil-gas lubrication instead of thin oil lubrication, so that the working temperature of a bearing is very high. Meanwhile, in order to improve production efficiency, the rolling mill is often operated at a high speed, for example, at a speed of more than 1200rpm, and at this time, the high temperature of the bearing may cause an accident of locking of the bearing, thereby causing a serious loss. For this purpose, it is necessary to measure the temperature of the cold-rolled backup roll bearing.

It is known that in one current temperature measurement scheme, the temperature of the bearing housing is measured every 30 minutes at positions spaced 2 meters apart using a non-contact infrared temperature sensor. However, due to the complex application environment of the field bearing housing being contaminated with oil and coolant, it is difficult to accurately measure the temperature of the bearing housing. In addition, because the distance between the bearing seat and the bearing is long and the thermal resistance is large, the temperature of the bearing is unknown even if the temperature of the bearing seat can be accurately measured. In addition, the non-contact infrared temperature measurement scheme can only monitor the temperature of the bearing seat off line, and extra labor cost is required.

It is also known to mount a cabled temperature sensor in the bearing housing and bring it into contact with or close to the bearing outer ring in a further temperature measuring solution. However, the temperature sensor cannot measure the actual temperature of the bearing at this time. In addition, since the support roller needs to be frequently replaced for maintenance, installation of the temperature sensor at each maintenance and cable connection are very inconvenient.

It is also known to mount a wireless temperature sensor with a battery within the bearing housing and bring the temperature sensor into contact with or close proximity to the bearing outer race in a further temperature measurement scheme. However, due to the limitations of batteries and electronic components, most wireless temperature sensors with batteries are not suitable for high temperature conditions above 85 ℃.

Disclosure of Invention

It is therefore an object of the present invention to provide a bearing device incorporating a temperature measurement module suitable for high temperature environments, such as the cold rolling production line of the steel industry, which is capable of measuring the true temperature of the bearing and which is preferably capable of being implemented cost-effectively and simply.

According to an aspect of the invention, the above object is achieved by a bearing arrangement. The bearing device comprises a bearing and a temperature measuring module, wherein the bearing comprises an axial end side member, wherein the temperature measuring module comprises a temperature sensor assembly and an antenna, wherein the temperature sensor assembly is arranged at an axial end face of the axial end side member, and the temperature sensor assembly comprises a passive wireless temperature sensor. The antenna is arranged facing the temperature sensor assembly and separately from the temperature sensor assembly, the antenna is able to wirelessly acquire electrical energy by means of a further antenna arranged remote from the bearing and wirelessly supply electrical energy to the passive wireless temperature sensor, and the antenna is able to wirelessly acquire temperature information measured by the passive wireless temperature sensor and wirelessly transmit the temperature information to the further antenna.

It should be noted that the specific type of bearing is not limited herein. The bearing device can adopt a required bearing according to actual working conditions. The bearing is preferably a rolling bearing, in particular a radial rolling bearing. In this case, the axial end side member may be a member of the rolling bearing located at the bearing axial end portion, such as a retainer ring, or a member partially forming the bearing axial end portion, such as an outer ring and an inner ring.

The passive wireless temperature sensor is preferably a passive wireless temperature sensor integrated on a chip. In this case, in order to satisfy the normal function of the passive wireless temperature sensor, the passive wireless temperature sensor or, more precisely, the chip integrating the passive wireless temperature sensor should further include necessary components such as a wireless charging unit, a wireless communication unit, an MCU unit, and an analog-to-digital conversion unit.

The antenna can be mounted on the bearing block or on a component fixedly connected to the bearing block, for example an end cap. The antenna is arranged in such a way that it can wirelessly supply power to the passive wireless temperature sensor by means of electromagnetic waves and can receive measurement information about the temperature of the axial end piece, which the passive wireless temperature sensor emits, for example, by means of its wireless communication unit.

Because the passive wireless temperature sensor does not need a battery, the passive wireless temperature sensor is not limited by poor temperature resistance of the battery and corresponding electronic components, and can operate in working conditions with higher temperature, such as working conditions of nearly 100 ℃ like a cold rolling production line in the steel industry. In addition, since the antenna and the passive wireless temperature sensor of the temperature measurement module are both wireless components, components such as the antenna and the temperature sensor assembly on which the temperature measurement module is mounted can be easily replaced or mounted in a condition such as a cold rolling line where maintenance is performed by frequently replacing components such as a support roller supported by a bearing.

It is to be understood here that the bearing device can comprise at least two temperature measuring modules, if necessary. At least two temperature measuring modules are preferably arranged in a uniformly distributed manner in the circumferential direction.

In a preferred embodiment, the passive wireless temperature sensor is an RFID wireless passive temperature sensor. Alternatively, the passive wireless temperature sensor is a SAW wireless passive temperature sensor. Thereby enabling a passive wireless temperature sensor to be implemented at a lower cost.

In a preferred embodiment, the temperature sensor assembly further comprises a sensor cover made of plastic or rubber, which sensor cover is configured with a sensor receiving groove on a side facing the axially inner portion of the bearing, in which sensor receiving groove the passive wireless temperature sensor is arranged. The sensor cover is preferably made of plastic or rubber material with high temperature, aging resistance, oil resistance and good radio frequency electromagnetic wave penetration performance. Preferably, the material of the sensor cover is PPS. The sensor cover can be directly or indirectly fixedly mounted at the axial end face of the axial end-side member. The sensor accommodating groove should completely accommodate the passive wireless temperature sensor, and the sensor accommodating groove accommodating the passive wireless temperature sensor can be closed by the axial end side member or another member. The groove shape of the sensor receiving groove preferably substantially matches the structure of the passive wireless temperature sensor or the chip integrated with the passive wireless temperature sensor. Preferably, the sensor receptacle groove is configured as a substantially rectangular groove, wherein the longitudinal axis or long side of the rectangle extends substantially tangentially to the axial end-side component.

Here, the passive wireless temperature sensor is preferably partially encapsulated by the encapsulation matrix. The passive wireless temperature sensor can be stably mounted in the sensor accommodating groove by means of the packaging substrate. Thereby facilitating assembly of the temperature sensor assembly and helping to protect the passive wireless temperature sensor from adverse effects of vibration and the like.

Here, preferably, the sensor accommodation groove is configured with a positioning recess in which a portion of the passive wireless temperature sensor that is not covered by the package base is positioned, so that the passive wireless temperature sensor can be accurately positioned.

Here, it is particularly preferable that the positioning recess is configured as a semicircular groove having a radius of 1mm to 2 mm. In this case, the wireless signal transmission distance of the passive wireless temperature sensor is long, and thus the antenna can be arranged relatively flexibly in pitch.

In this case, it is particularly preferred that the temperature sensor arrangement further comprises a base plate made of metal, which is fixedly connected to the sensor cover and encloses the sensor receptacle groove. The base plate can be connected to the sensor cover by a connecting element, for example a bolt. The temperature sensor assembly can be mounted on the axial end face component via the base plate, whereby the stability of the connection, for example a screw connection or a form-fitting connection, can be increased by means of a metallic base plate of high strength.

In a preferred embodiment, the axial end-side member is a retainer ring of the bearing. In this case, the other components of the bearing can remain the existing design, and the cost of product retrofit is low. Furthermore, the mounting of the temperature sensor assembly at the collar can be implemented at low cost.

Here, preferably, the retainer ring is configured with a component accommodation groove that opens toward the axial outside and the radial inside of the bearing, in which the temperature sensor component is mounted. The assembly receiving groove at the securing ring in this case avoids in particular the bearing region of the bearing and facilitates the assembly of the bearing. The temperature sensor component is fixed in the component receptacle groove by means of a connection means, such as, for example, bolting, riveting, welding, form-fitting or interference-fitting. Thus, the temperature sensor assembly can be firmly mounted, and the axial length of the bearing cannot be increased or excessively increased due to the addition of the temperature sensor assembly.

Here, it is preferable that the passive wireless temperature sensor is spaced from the side wall of the component accommodation groove on the radially outer side by 1mm to 6 mm. In particular, in the case of a passive wireless temperature sensor or a chip integrated with a passive wireless temperature sensor having a substantially elongated shape and a substantially rectangular component-receiving groove, the tangentially extending side wall of the component-receiving groove is spaced from the longitudinally extending side surface of the passive wireless temperature sensor facing the side wall by a distance of 1mm to 6 mm. In this case, it is particularly preferred if the passive wireless temperature sensor is spaced apart from the radially outer side wall of the component accommodation groove by 3 mm. The installation of the passive wireless temperature sensor can thus be achieved in a manner that optimizes the sensor signal strength, simplifies the component accommodation groove processing, and is cost effective.

Here, preferably, the temperature measurement module further comprises a measurement counterpart device, the measurement counterpart device comprising a further antenna. In this case, a further antenna arranged remote from the bearing can wirelessly supply power to the antenna, for example, at the bearing seat or the end cap by electromagnetic wave coupling and can wirelessly obtain temperature information about the axial end-side component from the antenna. The measurement partner can preferably transmit the temperature information of the bearing in real time to a production monitoring system, for example outside the workshop, in order to monitor the bearing temperature in real time.

Drawings

Features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

Fig. 1 shows a schematic half-sectional view of a bearing device integrated with an embodiment according to the invention;

FIG. 2 shows a perspective view of an unfinished assembled bearing arrangement according to the embodiment of FIG. 1;

fig. 3 shows a detail of a perspective view of a collar of the bearing arrangement according to fig. 1;

figure 4 shows a perspective view of a temperature sensor assembly of the bearing arrangement according to figure 1;

fig. 5 shows an exploded view of a temperature sensor assembly of the bearing arrangement according to fig. 1; and

fig. 6 shows a detail of a perspective view of the bearing arrangement according to fig. 1.

Detailed Description

Fig. 1 shows a schematic half-sectional view of a bearing arrangement integrated with an embodiment according to the invention. The bearing device can be particularly used in a cold rolling production line in the steel industry. The bearing device includes a bearing 100. Here, the bearing 100 is mounted in the bearing housing 200 and the end side of the bearing housing 200 is closed by an end cap 300.

The bearing device further comprises a temperature measurement module, wherein the temperature measurement module comprises a temperature sensor assembly 400 and an antenna 500. As shown in fig. 1, in the present embodiment, the temperature sensor assembly 400 is mounted on the axial end side of the bearing 100, and the antenna 500 is mounted on the end cap 300 so as to face the temperature sensor assembly 400.

Fig. 2 shows a perspective view of an unfinished assembled bearing arrangement according to the embodiment of fig. 1. As shown in fig. 2, the bearing according to the present embodiment is configured as a cylindrical roller bearing 100. The cylindrical roller bearing 100 includes two sets of an outer ring 120 and an inner ring 160 arranged coaxially and a total of four rows of rolling bodies 140 arranged radially between the outer ring 120 and the inner ring 160. The rolling bodies 140 are configured as cylindrical rollers. The pin-through cage 150 serves to hold the plurality of rolling bodies 140 at predetermined intervals in the circumferential direction. The intermediate spacer 130 is axially disposed between the two outer rings 120. Two retainer rings 110, 170 are respectively disposed at both axial ends of the cylindrical roller bearing 100. The retainer ring 110 of the two retainer rings 110, 170, which is disposed adjacent to the end cap 300, can mount the temperature sensor assembly 400. In the present embodiment, the bearing device further comprises two temperature measuring modules, wherein the temperature sensor assemblies 400 respectively belonging to the two temperature measuring modules are mounted at the axial end face of the retainer ring 110 in diametrically opposed relation.

Fig. 3 shows a detail of a perspective view of the retaining ring 110 of the bearing arrangement according to fig. 1. The retainer ring 110 is configured with a component accommodation groove 111 for mounting the temperature sensor component 400, the component accommodation groove 111 opening toward the axially outer side and the radially inner side of the bearing 100. Here, the assembly receiving groove 111 at the retainer ring 110 avoids the bearing area of the bearing and facilitates the installation of the bearing.

Figure 4 shows a perspective view of a temperature sensor assembly of the bearing arrangement according to figure 1; fig. 5 shows an exploded view of a temperature sensor assembly of the bearing arrangement according to fig. 1. As shown in fig. 4 and 5, the passive wireless temperature sensor 410 is an RFID wireless passive temperature sensor and is integrated on a chip. The chip also provides the necessary components of a wireless charging unit, a wireless communication unit, an MCU unit, an analog-to-digital conversion unit, and the like for satisfying the normal function of the passive wireless temperature sensor 410. The chip is partially encapsulated by the package substrate 420. Thereby facilitating assembly of the temperature sensor assembly 400 and helping to protect the passive wireless temperature sensor 410 from adverse effects of vibration and the like

The temperature sensor assembly 400 also includes a sensor cover 430. The sensor cover 430 is made of PPS material with high temperature, aging resistance, oil resistance and good radio frequency electromagnetic wave penetration performance. One side of the sensor cover 430 is configured with a sensor receiving groove 431. The groove shape of the sensor receiving groove 431 substantially matches the elongated structure of the chip, and the sensor receiving groove 431 is configured as a blind groove having a substantially rectangular shape. The chip integrated with the passive wireless temperature sensor 410 is mounted in the sensor receiving groove 431 by means of the package base 420 with an over-pressure fit. Further, the sensor accommodation groove 431 is configured with a positioning recess 432, and a portion of the chip not covered by the package base 420 is positioned in the positioning recess 432, so that the passive wireless temperature sensor can be accurately positioned. The positioning concave part is a semicircular groove, and the radius of the semicircular groove is 1 mm-2 mm. In this case, the wireless signal transmission distance of the passive wireless temperature sensor 410 is long, and thus the antenna 500 can be relatively flexibly arranged in the pitch.

The temperature sensor assembly 400 also includes a base plate 440 made of metal. In the present embodiment, the bottom plate 440 encloses the sensor accommodation groove 431, thereby enclosing the passive wireless temperature sensor 410 within the sensor cover 430. Here, the base plate 440 and the sensor cover 430 are fixedly connected by bolts 460, i.e., second bolts. For this, a screw hole 433, that is, a second screw hole, is provided at the periphery of the sensor receiving groove 431 of the sensor cover 430, and a through hole 442, that is, a second through hole, is provided at a corresponding position of the bottom plate 440, and a plurality of second bolts 460 can be screwed into the second screw hole of the sensor cover 430 through the second through hole of the bottom plate 440.

Fig. 6 shows a detail of a perspective view of the bearing arrangement according to fig. 1. The temperature sensor assembly 400 can be mounted in the assembly receptacle 111 of the securing ring 110 by means of the base plate 440 by means of the screw 450, i.e., the first screw. Specifically, the component receiving groove 111 is configured with a threaded hole 112, i.e., a first threaded hole (see fig. 3), and the base plate 440 is correspondingly configured with a through hole, i.e., a first through hole (see fig. 5), through which the first bolt 450 can be screwed into the first threaded hole of the retainer ring 110. Here, the temperature sensor module 400 is positioned such that the tangentially extending side wall of the module accommodating groove 111 is spaced apart from the side surface of the passive wireless temperature sensor 410 extending in the longitudinal direction thereof facing the side wall by 1mm to 6mm, preferably 3 mm. The installation of the passive wireless temperature sensor can thus be achieved in a manner that optimizes the sensor signal strength, simplifies the component accommodation groove processing, and is cost effective.

The temperature measuring module further comprises a measuring counter-device, not shown, which can be arranged remotely from the bearing 100, the measuring counter-device comprising a further antenna. When measuring the bearing temperature, the further antenna can wirelessly supply power to the antenna 500 at the end cap by electromagnetic wave coupling, the antenna 500 can wirelessly supply power to the passive wireless temperature sensor 410, the passive wireless temperature sensor 410 wirelessly transmits its measured collar temperature information to the antenna 500, and the antenna 500 wirelessly transmits the acquired collar temperature information to the measurement counterpart device by means of the further antenna. The measurement partner can preferably transmit the temperature information of the bearing in real time to a production monitoring system, for example outside the workshop, in order to monitor the bearing temperature in real time.

Because the passive wireless temperature sensor 410 does not need a battery, the passive wireless temperature sensor is not limited by poor temperature resistance of the battery and corresponding electronic components, and can operate in a working condition with high temperature, such as a working condition of nearly 100 ℃ like a cold rolling production line in the steel industry. In addition, since the antenna 500 and the passive wireless temperature sensor 410 of the temperature measurement module are both wireless components, components such as the antenna and the temperature sensor assembly, to which the temperature measurement module is mounted, can be simply replaced or mounted in a working condition in which the backup roll needs to be frequently replaced for maintenance in a cold rolling line.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified and defined, the terms "axial", "radial" and "circumferential" are based on the axis of rotation of the bearing. The term "axial" is understood here to mean a direction along the axis of rotation or a direction parallel to the axis of rotation; the term "radial" is understood to mean a direction perpendicular to and intersecting the axis of rotation; the term "circumferential direction" is to be understood as a direction around the axis of rotation. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

List of reference numerals

100 rolling bearing

110 baffle ring

111 assembly accommodating groove

112 threaded hole

120 outer ring

130 middle partition ring

140 rolling body

150 holding rack

160 inner ring

170 retainer ring

200 bearing seat

300 end cap

400 temperature sensor assembly

410 passive wireless temperature sensor

420 base body

430 sensor cover

431 sensor accommodating groove

432 positioning recess

433 threaded hole

440 base plate

441 first through hole

442 second through-hole

450 first bolt

460 second bolt

500 antenna

Claims (11)

1. A bearing device, comprising:

a bearing (100) including an axial end-side member (110);

a temperature measurement module, comprising:

a temperature sensor assembly (400), wherein the temperature sensor assembly (400) is arranged at an axial end face of the axial end side member (110), and the temperature sensor assembly (400) comprises a passive wireless temperature sensor (410);

an antenna (500), wherein the antenna (500) faces the temperature sensor assembly (400) and is arranged separately from the temperature sensor assembly (400), the antenna (500) is wirelessly retrievable by means of a further antenna arranged remote from the bearing (100) and wirelessly supplies the electrical energy to the passive wireless temperature sensor (410), and the antenna (500) is wirelessly retrievable by temperature information measured by the passive wireless temperature sensor (410) and wirelessly transmits the temperature information to the further antenna.

2. The bearing device according to claim 1, wherein the passive wireless temperature sensor (410) is an RFID wireless passive temperature sensor.

3. The bearing arrangement according to claim 1, wherein the temperature sensor assembly (400) further comprises a sensor cover (430) made of plastic or rubber, the sensor cover (430) being configured with a sensor receiving groove (431) at a side facing an axially inner portion of the bearing (100), the passive wireless temperature sensor (410) being arranged in the sensor receiving groove (431).

4. A bearing arrangement according to claim 3, wherein the passive wireless temperature sensor (410) is partially encapsulated by an encapsulation matrix (420).

5. The bearing device according to claim 4, wherein the sensor receiving groove (431) is configured with a positioning recess (432), a portion of the passive wireless temperature sensor (410) not covered by the encapsulation base (420) being positioned in the positioning recess (432).

6. The bearing device according to claim 5, wherein the positioning recess (432) is configured as a semi-circular groove having a radius of 1mm to 2 mm.

7. The bearing arrangement according to claim 3, wherein the temperature sensor assembly (400) further comprises a bottom plate (440) made of metal, the bottom plate (440) being fixedly connected with the sensor cover (430) and enclosing the sensor receiving groove (431).

8. The bearing arrangement according to claim 1, wherein the axial end side member (110) is a retainer ring of the bearing (100).

9. The bearing arrangement according to claim 8, wherein the retaining ring (110) is configured with a component receiving groove (111) which opens towards an axially outer side and a radially inner side of the bearing (100), the temperature sensor component (400) being mounted in the component receiving groove (111).

10. The bearing arrangement according to claim 9, wherein the passive wireless temperature sensor (410) is spaced from the radially outer side wall of the component receiving groove (111) by 1-6 mm.

11. The bearing arrangement of claim 1, wherein the temperature measurement module further comprises a measurement counterpart device comprising the further antenna.

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