CN220187870U - Motor bearing temperature measuring device - Google Patents
Motor bearing temperature measuring device Download PDFInfo
- Publication number
- CN220187870U CN220187870U CN202321953443.3U CN202321953443U CN220187870U CN 220187870 U CN220187870 U CN 220187870U CN 202321953443 U CN202321953443 U CN 202321953443U CN 220187870 U CN220187870 U CN 220187870U
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- China
- Prior art keywords
- temperature measuring
- fixing unit
- wire
- motor bearing
- motor
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- 239000000523 sample Substances 0.000 claims abstract description 49
- 238000009529 body temperature measurement Methods 0.000 claims abstract description 6
- 238000001125 extrusion Methods 0.000 claims abstract description 6
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 17
- 239000011810 insulating material Substances 0.000 claims description 6
- 238000009413 insulation Methods 0.000 claims 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000005672 electromagnetic field Effects 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 239000004593 Epoxy Substances 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000002679 ablation Methods 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Abstract
The utility model relates to a motor bearing temperature measuring device, which comprises a lead, wherein one end of the lead is provided with a temperature measuring probe, the other end of the lead is connected with a temperature measuring junction box for feeding back the temperature of a measured bearing measured by the temperature measuring probe, one end of the lead, which is positioned on the temperature measuring probe, is provided with a fixing mechanism connected with a motor, a spring is arranged between the temperature measuring probe and the fixing mechanism, the temperature measuring probe is enabled to be close to the position of the measured bearing through extrusion of the spring, the fixing mechanism comprises a first fixing unit and a second fixing unit which are symmetrically arranged, and a wire protecting unit arranged between the first fixing unit and the second fixing unit, the first fixing unit is used for being connected with a motor bearing sleeve, the second fixing unit is used for being connected with a motor base, and the first fixing unit is arranged close to one end of the temperature measuring probe. The motor bearing temperature measuring device is convenient to install, accurate in measuring result, high in use safety, and capable of being applied to bearing temperature measurement of various motors, and is wide in application.
Description
Technical Field
The utility model belongs to the technical field of motor bearing testing, and particularly relates to a motor bearing temperature measuring device.
Background
The shaft current of the motor always exists, when the shaft voltage increases to a certain value, particularly when the motor starts, a lubricating oil film in a bearing is not formed stably, and the shaft voltage breaks down the oil film to discharge, so that a loop is formed, and the shaft current is generated. The axle current has great influence on the service life of the bearing, and the axle current can cause ablation on the surfaces of the rolling bodies and the surfaces of the bearing rings, so that a light person generates heat and has abnormal temperature, and a heavy person is mutually locked or the scattered frame triggers overcurrent protection to stop the machine, and even the motor is burnt. Therefore, in order to ensure stable operation of the motor, it is very important to measure the temperature of the motor bearing.
The current common method for measuring the temperature of the motor bearing comprises a handheld infrared temperature measuring detector and a motor bearing installation temperature sensor. The infrared thermometer has the defects that the infrared thermometer is easily influenced by the environment and the surface state of the surface to be measured, and the temperature of the motor bearing needs to be manually checked, so that the accuracy of the temperature measurement result is not too high, and the temperature of the bearing cannot be detected in real time; the motor bearing is provided with a temperature sensor which is widely used at present, and in the prior art, if the temperature sensor is used for measuring the shaft temperature during the movement of the bearing at a shorter distance, the temperature sensor is difficult to install; the electric wire connected with the temperature sensor is wrapped by the metal sleeve, and the phenomenon of electric conduction can occur under special conditions; when the temperature sensor measures temperature in a wired mode, the lead wire cannot be well fixed and protected during operation.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art, and provides a motor bearing temperature measuring device, one end of a lead of the temperature measuring device is provided with a temperature measuring probe, the other end of the lead is connected with a temperature measuring junction box for feeding back the temperature measuring probe to measure the temperature of a measured bearing, one end of the lead, which is positioned on the temperature measuring probe, is provided with a fixing mechanism connected with a motor, a spring is arranged between the temperature measuring probe and the fixing mechanism, and the temperature measuring probe is abutted against the position of the measured bearing through the extrusion of the spring, so that the temperature measuring probe can be fixedly placed at a position closer to the bearing, and the temperature of the bearing can be accurately measured.
The utility model aims at solving the problems by the following technical scheme:
the utility model provides a motor bearing temperature measuring device, sets up on the bearing room supports, its characterized in that, including the lead wire, temperature probe is installed to the one end of lead wire, and the other end is connected with and is used for feeding back temperature probe measures the temperature measurement terminal box of being surveyed the bearing temperature, be provided with the fixed establishment who is connected with the motor on the lead wire, be located temperature probe's one end, just be provided with the spring between temperature probe and the fixed establishment, through the spring is used for the extrusion messenger temperature probe is close to the measured bearing position.
Further, the fixing mechanism comprises a first fixing unit and a second fixing unit which are symmetrically arranged and a wire protection unit arranged between the first fixing unit and the second fixing unit, the first fixing unit is used for being connected with a motor bearing sleeve, the second fixing unit is used for being connected with a motor base, and the first fixing unit is arranged close to one end of the temperature measuring probe.
Further, the first fixing unit comprises a first right-angle hollow elbow, the horizontal end and the vertical end of the first right-angle hollow elbow are fixedly connected with a first hollow screw rod, the first hollow screw rod at the vertical end is fixedly connected with one end of the first double-head hexagonal hollow screw rod through a first nut, and the other end of the first double-head hexagonal hollow screw rod is locked through a first locking nut positioned at one side of the motor bearing sleeve after being inserted into a hole formed in the motor bearing sleeve.
Further, the second fixing unit comprises a second right-angle hollow elbow, the horizontal end and the vertical end of the second right-angle hollow elbow are fixedly connected with second hollow screws, the second hollow screws at the vertical end are fixedly connected with second double-head hexagonal hollow screws through second nuts, and the other ends of the second double-head hexagonal hollow screws are locked through second locking nuts positioned on one side of the motor base after being inserted into holes formed in the motor base.
Further, the wire protecting unit comprises a wire protecting hose, a first wire protecting spring nut and a second wire protecting spring nut are symmetrically arranged at two ends of the wire protecting hose, the first wire protecting spring nut is fixedly connected with a first hollow screw rod at the horizontal end, and the second wire protecting spring nut is fixedly connected with a second hollow screw rod at the horizontal end.
Further, the first wire protection spring nut is made of an insulating material, so that the first hollow stud at the horizontal end and the wire protection hose are in an open circuit state, and shaft current is prevented from conducting.
Further, the wire protection unit further comprises an insulating pad, and the insulating pad is arranged between the first wire protection spring nut and the first hollow screw rod at the horizontal end.
Further, the wire protection hose is a spiral protection sleeve, and the spiral protection sleeve is sleeved on the circumferential direction of the lead wire between the first fixing unit and the second fixing unit.
Further, the lead penetrates through the temperature measuring probe, the spring and the fixing mechanism, and a circle of shielding layer is arranged outside the lead, so that the accuracy of pt100 measurement value transmission is guaranteed for shielding interference of an external electromagnetic field.
Compared with the prior art, the technical scheme provided by the utility model has the following beneficial effects:
1. according to the motor bearing temperature measuring device, the spring is arranged between the temperature measuring probe and the fixing mechanism, and the temperature measuring probe can be made to be close to the position of the measured bearing through extrusion of the spring, so that the temperature measuring probe stretches into the bearing chamber to measure the temperature of the shaft at a shorter distance, and the temperature measuring probe is extruded and compacted in the bearing chamber and cannot loosen, and the bearing temperature can be accurately measured and monitored in real time.
2. The utility model relates to a motor bearing temperature measuring device which is arranged on a bearing chamber support, wherein a fixing mechanism comprises a first fixing unit, a second fixing unit and a wire protection unit for connecting the first fixing unit and the second fixing unit, wherein the first fixing unit is fixedly connected with a motor bearing sleeve, and the second fixing unit is fixedly connected with a motor base, so that the temperature measuring device cannot fall down due to vibration in the process of measuring the temperature of a bearing, and the installation process is convenient and simple.
3. The utility model relates to a temperature measuring device for a motor bearing, which is provided with an insulating pad and a first wire protecting spring nut, so that an open circuit state is ensured between a first hollow elbow and a wire protecting hose, and an insulator is formed.
4. According to the motor bearing temperature measuring device, the lead wires of the temperature measuring device penetrate through the temperature measuring probe, the spring and the fixing mechanism, so that the temperature measuring device plays a role in protecting the lead wires in the transportation or use process, and the service life of the temperature measuring device is prolonged; in addition, a circle of shielding layer is arranged outside the lead, so that the interference of an external electromagnetic field is avoided, and the accuracy of a measurement result is ensured.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate principles of the utility model and together with the description, serve to explain the principles of the utility model.
In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a schematic diagram of a bearing temperature measuring device according to the present utility model.
Wherein: 1 is a lead wire; 2 is a temperature measuring probe; 3 is a fixing mechanism; 4 is a spring; 11 is a shielding layer; 31 is a first fixing unit; 32 is a wire protecting unit; 33 is a second fixing unit; 311 is a first right angle hollow elbow; 312 is a first hollow screw; reference numeral 313 denotes a first nut; 314 is a first lock nut; 315 is a first double-ended hexagonal hollow screw; 321 a wire protecting hose; 322 is a first wire guard spring nut; 323 is the second wire-protecting spring nut; 324 is an insulating pad; 331 is a second right angle hollow elbow; 332 is a second hollow screw; 333 is a second nut; 334 is a second lock nut; 335 a second double-ended hexagonal hollow screw.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the utility model. Rather, they are merely examples of devices that are consistent with aspects of the utility model that are set forth in the following claims.
The present utility model will be described in further detail below with reference to the drawings and examples for better understanding of the technical solutions of the present utility model to those skilled in the art.
Referring to fig. 1, an embodiment of the utility model provides a motor bearing temperature measuring device, which comprises a lead 1, wherein one end of the lead 1 is provided with a temperature measuring probe 2, the other end of the lead 1 is connected with a temperature measuring junction box for feeding back the temperature of a measured bearing measured by the temperature measuring probe 2, one end of the lead 1, which is positioned on the temperature measuring probe 2, is provided with a fixing mechanism 3 connected with a motor, a spring 4 is arranged between the temperature measuring probe 2 and the fixing mechanism 3, and the temperature measuring probe 2 can be abutted to the position of the measured bearing through extrusion of the spring 4.
Specifically, the temperature measuring probe 2 adopts the pt100 temperature measuring sensor, one end of the platinum thermal resistor and one end of the lead wire 1 are connected and installed in the shell of the temperature measuring probe 2, then the other end of the lead wire 1 is connected to a temperature measuring junction box corresponding to the pt100 temperature measuring sensor, when the motor normally operates or is abnormal, the temperature of the bearing changes, the pt100 shows different resistance values, and the corresponding temperature can be obtained according to the resistance values. The temperature measuring probe 2 is of a hollow cylinder structure, iron is selected as a material, the temperature measuring probe has good ductility, electrical conductivity and heat conduction performance, the temperature measuring probe 2 is the best choice for manufacturing the temperature measuring probe 2, the diameter of the temperature measuring probe 2 is smaller than that of a threaded hole on the surface of the bearing sleeve, and the temperature measuring probe 2 can freely enter and exit from the threaded hole on the surface of the bearing sleeve without obstruction.
The fixing mechanism 3 includes a first fixing unit 31 and a second fixing unit 33, which are symmetrically arranged, and a wire protecting unit 32 arranged between the first fixing unit 31 and the second fixing unit 33, wherein the first fixing unit 31 is connected with a motor bearing sleeve, the second fixing unit 33 is connected with a motor base, and the first fixing unit 31 is arranged at one end close to the temperature measuring probe 2. The first fixing unit 31 includes a first right-angle hollow elbow 311, the horizontal end and the vertical end of the first right-angle hollow elbow 311 are both fixedly connected with a first hollow screw rod 312, the first hollow screw rod 312 at the vertical end is fixedly connected with one end of a first double-head hexagonal hollow screw rod 315 through a first nut 313, the first hollow screw rod 312 at the horizontal end is selected as M8, the first hollow screw rod 312 at the vertical end is selected as M10, the first right-angle hollow elbow 311 is made of iron or stainless steel, and the other end of the first double-head hexagonal hollow screw rod 315 is locked through a first locking nut 314 positioned at one side of the motor bearing sleeve after being inserted into a hole formed in the motor bearing sleeve; the second fixing unit 33 includes a second right-angle hollow elbow 331, the horizontal end and the vertical end of the second right-angle hollow elbow 331 are both fixedly connected with a second hollow screw 332, the second hollow screw 332 at the vertical end is fixedly connected with a second double-head hexagonal hollow screw 335 through a second nut 333, the second hollow screw 332 at the horizontal end is selected as M8, the second hollow screw 332 at the vertical end is selected as M10, the second right-angle hollow elbow 331 is made of iron or stainless steel, and the other end of the second double-head hexagonal hollow screw 335 is locked through a second locking nut 334 positioned at one side of the motor base after being inserted into a hole formed in the motor base.
The wire protecting unit 32 comprises a wire protecting hose 321, wherein a first wire protecting spring nut 322 and a second wire protecting spring nut 323 are symmetrically arranged at two ends of the wire protecting hose 321, the first wire protecting spring nut 322 is fixedly connected with a first hollow screw 312 at the horizontal end, the second wire protecting spring nut 323 is fixedly connected with a second hollow screw 332 at the horizontal end, the wire protecting unit is used for protecting two ports of the wire protecting hose 321, in addition, the first wire protecting spring nut 322 is made of an insulating material, and insulating materials such as nylon, ceramic, epoxy and the like can be selected as materials of the insulating pad 324; the wire protecting unit 32 further comprises an insulating pad 324, the insulating pad 324 is disposed between the first wire protecting spring nut 322 and the first hollow screw 312 at the horizontal end, and the diameter of the insulating pad 324 is identical to that of the first hollow screw 312 at the horizontal end, so as to be well adhered to the first wire protecting spring nut 322, and the first wire protecting spring nut 322 can be wrapped inside the first wire protecting spring nut 322 to be protected after being connected with the first hollow screw 312 at the horizontal end, and the insulating pad 324 and the first wire protecting spring nut 322 are made of insulating materials such as nylon, ceramic, epoxy, etc., in addition, the insulating pad 324 and the first wire protecting spring nut 322 are made of insulating materials, so that when the shaft current passes through the temperature measuring device, the first hollow screw 312 at the horizontal end and the wire protecting hose 321 are in a disconnection state, thereby preventing the conduction of the shaft current, and thus playing an insulating role.
Specifically, the wire protecting hose 321 is a spiral protecting sleeve, the spiral protecting sleeve is sleeved on the circumference of the lead between the first fixing unit 31 and the second fixing unit 33, the wire protecting hose 321 is sleeved on the outer layer of the lead 1 to protect the lead from abrasion and bending and delay the aging of the lead due to the external environment, the wire protecting hose 321 is made of metal materials, and the wire protecting hose 321 is made of stainless steel materials optimally, so that the wire protecting hose 321 has certain rust resistance in the atmospheric environment and certain corrosion resistance in various liquid media, the length of the wire protecting hose 321 can be adjusted at will, and a proper length is selected according to the length of the lead 1 to be protected;
the lead 1 penetrates through the temperature probe 2, the spring 4 and the fixing mechanism 3, the shielding layer 11 is arranged in the lead 1, the shielding layer 11 is made of metal mesh, copper or aluminum can be selected as a shielding layer material, interference of an external electromagnetic field is shielded, and accuracy of pt100 measurement value transmission is guaranteed.
In the process of measuring the temperature of the motor bearing, the temperature measuring probe 2 is inserted from a threaded hole on the surface of the motor bearing sleeve, the temperature measuring probe 2 is pressed by the spring 4 to be close to the position of the measured bearing, then the first fixing unit 31 is connected and fastened with the motor bearing sleeve, the second fixing unit 33 of the temperature measuring device is connected and fastened with the motor base again, and finally the lead wire 1 on one side of the second fixing unit 33 is connected to a temperature measuring junction box corresponding to a temperature measuring sensor for monitoring the bearing temperature.
The foregoing is only a specific embodiment of the utility model to enable those skilled in the art to understand or practice the utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model.
It will be understood that the utility model is not limited to what has been described above and that various modifications and changes may be made without departing from the scope thereof. The scope of the utility model is limited only by the appended claims.
Claims (9)
1. The utility model provides a motor bearing temperature measuring device, sets up on bearing room supports, a serial communication port, including lead wire (1), temperature probe (2) are installed to the one end of lead wire (1), and the other end is connected with and is used for feeding back temperature probe (2) measure the temperature measurement terminal box of being surveyed the bearing temperature, on lead wire (1), be located temperature probe (2) one end be provided with fixed establishment (3) be connected with the motor, just be provided with spring (4) between temperature probe (2) and fixed establishment (3), through spring (4) are used for the extrusion to make temperature probe (2) support near by the measured bearing position.
2. The motor bearing temperature measuring device according to claim 1, wherein the fixing mechanism (3) comprises a first fixing unit (31) and a second fixing unit (33) which are symmetrically arranged and a wire protecting unit (32) arranged between the first fixing unit and the second fixing unit, the first fixing unit (31) is used for being connected with a motor bearing sleeve, the second fixing unit (33) is used for being connected with a motor base, and the first fixing unit (31) is arranged close to one end of a temperature measuring probe.
3. The motor bearing temperature measuring device according to claim 2, wherein the first fixing unit (31) comprises a first right-angle hollow elbow (311), a first hollow screw (312) is arranged at the horizontal end and the vertical end of the first right-angle hollow elbow (311), the first hollow screw (312) at the vertical end is connected and fixed with one end of a first double-head hexagonal hollow screw (315) through a first nut (313), and the other end of the first double-head hexagonal hollow screw (315) is locked through a first locking nut (314) positioned at one side of the motor bearing sleeve after being inserted into a hole formed in the motor bearing sleeve.
4. A motor bearing temperature measuring device according to claim 3, characterized in that the second fixing unit (33) comprises a second right-angle hollow elbow (331), the horizontal end and the vertical end of the second right-angle hollow elbow (331) are provided with a second hollow screw (332), the second hollow screw (332) at the vertical end is fixedly connected with a second double-head hexagonal hollow screw (335) through a second nut (333), and the other end of the second double-head hexagonal hollow screw (335) is locked through a second locking nut (334) positioned at one side of the motor base after being inserted into a hole formed in the motor base.
5. The motor bearing temperature measuring device according to claim 4, wherein the wire protecting unit (32) comprises a wire protecting hose (321), a first wire protecting spring nut (322) and a second wire protecting spring nut (323) are symmetrically arranged at two ends of the wire protecting hose (321), the first wire protecting spring nut (322) is fixedly connected with a first hollow screw (312) at the horizontal end, and the second wire protecting spring nut (323) is fixedly connected with a second hollow screw (332) at the horizontal end.
6. The motor bearing temperature measurement device of claim 5, wherein the first guard spring nut (322) is made of an insulating material.
7. The motor bearing temperature measurement device of claim 5, wherein the wire guard unit (32) further comprises an insulation pad (324), the insulation pad (324) being disposed between the first wire guard spring nut (322) and the first hollow screw (312) at the horizontal end.
8. The motor bearing temperature measuring device according to claim 5, wherein the wire protecting hose (321) is a spiral protecting sleeve, and the spiral protecting sleeve is sleeved on the circumferential direction of the lead wire (1) between the first fixing unit (31) and the second fixing unit (33).
9. The motor bearing temperature measuring device according to claim 1, wherein the lead wire (1) penetrates through the temperature measuring probe (2), the spring (4) and the fixing mechanism (3), and a circle of shielding layer (11) is arranged outside the lead wire (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321953443.3U CN220187870U (en) | 2023-07-24 | 2023-07-24 | Motor bearing temperature measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321953443.3U CN220187870U (en) | 2023-07-24 | 2023-07-24 | Motor bearing temperature measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220187870U true CN220187870U (en) | 2023-12-15 |
Family
ID=89105618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321953443.3U Active CN220187870U (en) | 2023-07-24 | 2023-07-24 | Motor bearing temperature measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220187870U (en) |
-
2023
- 2023-07-24 CN CN202321953443.3U patent/CN220187870U/en active Active
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