Motor bearing temperature measuring device

Abstract

The utility model provides a motor bearing temperature measuring device which comprises a motor, a bearing shell and radiating fins, the bearing shell is installed on the end face of the motor, the radiating fins are fixedly connected to the outer surface of the motor, a bearing is installed in the motor, a connector is fixedly connected to the side face of the bearing shell, and the radiating fins are fixedly connected to the end face of the bearing shell. A temperature sensor is fixedly connected into the connector, the temperature sensing end face of the temperature sensor is an arc face, and the temperature sensing end face of the temperature sensor abuts against the surface of the bearing outer ring. The temperature sensor has the advantages that the connecting layer, the sleeve and the aluminum foil layer are designed, the sleeve is installed on the surface of the bearing shell through the connecting layer, the sleeve covers the outer surface of the temperature sensor, the aluminum foil layer is arranged in the sleeve, the sleeve is made of polystyrene and matched with the aluminum foil layer, and the sleeve and the aluminum foil layer are both made of efficient thermal insulation materials. The temperature sensor is prevented from being affected by an external heat source or a cooling source, and measurement errors are effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of bearing temperature measurement, in particular to a motor bearing temperature measurement device. Background Art

[0002] Motor bearing temperature is an important indicator that needs to be monitored during motor operation.

[0003] In the prior art, sensors are commonly used to measure the temperature of motor bearings. The working principle is that the temperature sensor is installed on the motor bearing shell to monitor the temperature change of the bearing in real time. The temperature sensor can sense the heat generated by the bearing and convert it into a measurable electrical signal.

[0004] The temperature sensor works based on the principle of thermoelectric effect. When two wires of different metals are connected together to form a closed loop, if the temperatures of the two junctions are different, an electromotive force, i.e., thermoelectric potential, will be generated. This thermoelectric potential is proportional to the temperature difference between the junctions, so the bearing temperature can be inferred by measuring the thermoelectric potential.

[0005] However, in the prior art, the temperature measurement of the motor bearing using the sensor is often inaccurate. The reason is that the temperature sensor is affected by the external heat source or cooling source, and there is a certain error in the temperature measurement.

[0006] At the same time, when installing the junction box of the temperature sensor, it is also necessary to drill holes on the seat of the motor to install it with screws, which is not convenient for installation. Therefore, a new motor bearing temperature measuring device is proposed to solve the above problem. Utility Model Content

[0007] The purpose of the present invention is to solve at least one of the above technical deficiencies.

[0008] Therefore, one purpose of the present invention is to provide a motor bearing temperature measuring device to solve the problems mentioned in the background technology and overcome the deficiencies in the prior art.

[0009] In order to achieve the above-mentioned purpose, an embodiment of one aspect of the utility model provides a motor bearing temperature measuring device, comprising a motor, a bearing shell, and a heat dissipation fin, wherein a bearing shell is installed on the end surface of the motor, a plurality of heat dissipation fins are fixedly connected to the outer surface of the motor, a bearing is installed inside the motor, a joint is fixedly connected to the side of the bearing shell, and a temperature sensor is fixedly connected inside the joint;

[0010] The temperature sensing end surface of the temperature sensor is an arc surface, and the temperature sensing end surface of the temperature sensor abuts against the surface of the outer ring of the bearing;

[0011] The other end of the temperature sensor is connected to a junction box via a cable, and a digital display screen is installed on the junction box;

[0012] Two groups of card boards are fixedly connected to the back of the junction box, and a single group of the card boards is clamped on a heat dissipation fin;

[0013] A connecting layer is fixedly connected to the surface of the bearing shell, a sleeve is fixedly connected to the end surface of the connecting layer, and an aluminum foil layer is arranged inside the sleeve.

[0014] Preferably, any of the above schemes is that the joint is bonded to the temperature sensor, and the joint is welded to the bearing shell.

[0015] The above technical solution is adopted: the temperature sensor is installed on the motor bearing shell to monitor the temperature change of the bearing in real time. The temperature sensor can sense the heat generated by the bearing and convert it into a measurable electrical signal.

[0016] The temperature sensor works based on the principle of thermoelectric effect. When two wires of different metals are connected together to form a closed loop, if the temperatures of the two junctions are different, an electromotive force, i.e., thermoelectric potential, will be generated. This thermoelectric potential is proportional to the temperature difference between the junctions, so the bearing temperature can be inferred by measuring the thermoelectric potential.

[0017] The bearing temperature is output to the junction box and the value is displayed on the digital display.

[0018] Preferably, any of the above schemes is that the model of the temperature sensor is PT100, and the temperature sensor is located on the side of the bearing shell.

[0019] The above technical solution is adopted: improvements are made at the temperature sensor, and a connecting layer, sleeve and aluminum foil layer structure are designed. The sleeve is installed on the surface of the bearing shell through the connecting layer, and the sleeve covers the outer surface of the temperature sensor. There is an aluminum foil layer inside the sleeve. The sleeve is made of polypropylene and is matched with the aluminum foil layer. Both are high-efficiency thermal insulation materials, which can effectively prevent the temperature sensor from being affected by external heat sources or cooling sources, thereby effectively reducing measurement errors.

[0020] Preferably, any of the above solutions is that the junction box is located on one side of the motor, and a remote output line is fixedly connected to the side of the junction box.

[0021] The above technical solution is adopted: the temperature sensing end face of the temperature sensor is an arc surface, and the contact surface should be completely in contact with the surface measuring part of the bearing outer ring to avoid the presence of air, oil film, etc. in between to ensure the accuracy of the collected temperature.

[0022] Preferably, any of the above schemes is that two card plates are provided in each group, and the connecting layer is a glue layer.

[0023] Preferably, in any of the above schemes, the sleeve is made of polypropylene and the wiring of the temperature sensor penetrates through the sleeve.

[0024] The above technical solution is adopted: improvements at the junction box, a card plate is fixedly connected to the back of the junction box, there are four card plates in total and two groups are arranged, a single group of card plates is clamped on a heat dissipation fin, and a convenient installation structure is fixedly connected to the back of the junction box, and the two groups of card plates are directly clamped on the two heat dissipation fins of the motor. There is no need to use screws and other structures, so the junction box can be easily installed.

[0025] Compared with the prior art, the advantages and beneficial effects of the utility model are:

[0026] The motor bearing temperature measuring device is provided by matching the temperature sensor, the junction box, the digital display screen, the card board, the connection layer, the sleeve and the aluminum foil layer. The temperature sensor is improved and the connection layer, the sleeve and the aluminum foil layer structure are designed. The sleeve is installed on the surface of the bearing shell through the connection layer. The sleeve covers the outer surface of the temperature sensor. The sleeve has an aluminum foil layer inside. The sleeve is made of polypropylene and matched with the aluminum foil layer. Both are high-efficiency thermal insulation materials. The temperature sensor can be effectively prevented from being affected by an external heat source or cooling source, thereby effectively reducing the measurement error.

[0027] Improvements at the junction box are made in that a card plate is fixedly connected to the back of the junction box. There are four card plates in total and two groups are provided. A single group of card plates is clamped on a heat sink fin. A convenient installation structure is fixedly connected to the back of the junction box. The two groups of card plates are directly clamped on the two heat sink fins of the motor. There is no need to use screws or other structures, thereby achieving convenient installation of the junction box.

[0028] Additional aspects and advantages of the present invention will be given in part in the following description and in part will become apparent from the following description or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0030] Figure 1 It is a structural schematic diagram of the utility model from the first perspective;

[0031] Figure 2 It is a structural schematic diagram of the utility model from a second viewing angle;

[0032] Figure 3 It is a structural schematic diagram of the temperature sensor of the utility model;

[0033] Figure 4 It is a schematic cross-sectional structural diagram of the sleeve of the utility model.

[0034] In the figure: 1-motor, 2-bearing shell, 3-heat sink fin, 4-connector, 5-temperature sensor, 6-junction box, 7-digital display screen, 8-card board, 9-connection layer, 10-sleeve, 11-aluminum foil layer. DETAILED DESCRIPTION

[0035] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0036] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] like Figure 1-4 As shown, the motor bearing temperature measuring device comprises a motor 1, a bearing shell 2, and a heat dissipation fin 3. The bearing shell 2 is installed on the end surface of the motor 1, and a plurality of heat dissipation fins 3 are fixedly connected to the outer surface of the motor 1. A bearing is installed inside the motor 1, and a joint 4 is fixedly connected to the side of the bearing shell 2. A temperature sensor 5 is fixedly connected inside the joint 4.

[0038] The temperature sensing end surface of the temperature sensor 5 is an arc surface, and the temperature sensing end surface of the temperature sensor 5 abuts against the surface of the outer ring of the bearing;

[0039] The other end of the temperature sensor 5 is connected to a junction box 6 via a cable, and a digital display screen 7 is installed on the junction box 6;

[0040] Two sets of card plates 8 are fixedly connected to the back of the junction box 6, and a single set of card plates 8 is clamped on a heat dissipation fin 3;

[0041] A connecting layer 9 is fixedly connected to the surface of the bearing shell 2 , a sleeve 10 is fixedly connected to the end surface of the connecting layer 9 , and an aluminum foil layer 11 is arranged inside the sleeve 10 .

[0042] Embodiment 1: The joint 4 is bonded to the temperature sensor 5, and the joint 4 is welded to the bearing shell 2. The temperature sensor 5 is installed on the motor bearing shell 2 to monitor the temperature change of the bearing in real time. The temperature sensor 5 can sense the heat generated by the bearing and convert it into a measurable electrical signal. The temperature sensor 5 works based on the principle of thermoelectric effect. When two wires of different metals are connected together to form a closed loop, if the temperatures of the two contacts are different, an electromotive force, i.e., thermoelectric potential, will be generated. This thermoelectric potential is proportional to the temperature difference between the contacts, so the temperature of the bearing can be calculated by measuring the thermoelectric potential. The bearing temperature is output to the junction box 6 and the value is displayed on the digital display 7. And the bearing temperature value can be remotely transmitted through remote wiring.

[0043] Embodiment 2: The model of the temperature sensor 5 is PT100, and the temperature sensor 5 is located on the side of the bearing housing 2. The junction box 6 is located on one side of the motor 1, and the side of the junction box 6 is fixedly connected with a remote output line. The temperature sensing end face of the temperature sensor 5 is an arc surface, and the contact surface should be completely in contact with the surface measurement part of the outer ring of the bearing to avoid the presence of air, oil film, etc., so as to ensure the accuracy of the collected temperature. Two card plates 8 are provided in each group, and the connecting layer 9 is a rubber layer. The sleeve 10 is made of polypropylene, and the sleeve 10 is penetrated by the wiring of the temperature sensor 5.

[0044] The working principle of the utility model is as follows:

[0045] The temperature sensor 5 is mounted on the motor bearing housing 2 to monitor the temperature change of the bearing in real time. The temperature sensor 5 can sense the heat generated by the bearing and convert it into a measurable electrical signal.

[0046] Temperature sensor 5 It works based on the principle of thermoelectric effect. When two wires of different metals are connected together to form a closed loop, if the temperatures of the two junctions are different, an electromotive force, i.e. thermoelectric potential, will be generated. This thermoelectric potential is proportional to the temperature difference between the junctions, so the bearing temperature can be inferred by measuring the thermoelectric potential.

[0047] The bearing temperature is output to the junction box 6 and the value is displayed on the digital display screen 7. The bearing temperature value can be remotely transmitted through remote wiring.

[0048] Compared with the prior art, the present invention has the following beneficial effects:

[0049] The motor bearing temperature measuring device is provided by matching the temperature sensor 5, the junction box 6, the digital display screen 7, the card plate 8, the connection layer 9, the sleeve 10 and the aluminum foil layer 11. The temperature sensor 5 is improved, and the connection layer 9, the sleeve 10 and the aluminum foil layer 11 structure are designed. The sleeve 10 is installed on the surface of the bearing shell 2 through the connection layer 9, and the sleeve 10 covers the outer surface of the temperature sensor 5. The sleeve 10 has an aluminum foil layer 11 inside. The sleeve 10 is made of polypropylene and matched with the aluminum foil layer 11. Both are high-efficiency thermal insulation materials, which can effectively prevent the temperature sensor 5 from being affected by an external heat source or cooling source, and effectively reduce the measurement error.

[0050] The improvement at the junction box 6 is that a card plate 8 is fixedly connected to the back of the junction box 6. There are four card plates 8 in total and two groups are provided. A single group of card plates 8 is clamped on a heat dissipation fin 3. A convenient installation structure is fixedly connected to the back of the junction box 6. Two groups of card plates 8 are directly clamped on the two heat dissipation fins 3 of the motor 1. There is no need to use screws and other structures, so that the junction box 6 can be easily installed.

Claims

1. A motor bearing temperature measuring device, comprising a motor (1), a bearing shell (2), and heat dissipation fins (3), wherein the bearing shell (2) is mounted on the end surface of the motor (1), and a plurality of heat dissipation fins (3) are fixedly connected to the outer surface of the motor (1), characterized in that: A bearing is installed inside the motor (1); a joint (4) is fixedly connected to the side of the bearing shell (2); a temperature sensor (5) is fixedly connected inside the joint (4); the temperature sensing end surface of the temperature sensor (5) is an arc surface, and the temperature sensing end surface of the temperature sensor (5) abuts against the surface of the outer ring of the bearing; The other end of the temperature sensor (5) is connected to a junction box (6) via a cable, and a digital display screen (7) is installed on the junction box (6); Two groups of card plates (8) are fixedly connected to the back of the junction box (6), and a single group of the card plates (8) is clamped on a heat dissipation fin (3); A connecting layer (9) is fixedly connected to the surface of the bearing shell (2), a sleeve (10) is fixedly connected to the end surface of the connecting layer (9), and an aluminum foil layer (11) is arranged inside the sleeve (10).

2. A motor bearing temperature measuring device as claimed in claim 1, characterized in that: The joint (4) is bonded to the temperature sensor (5), and the joint (4) is welded to the bearing shell (2).

3. A motor bearing temperature measuring device as claimed in claim 2, characterized in that: The model of the temperature sensor (5) is PT100, and the temperature sensor (5) is located on the side of the bearing shell (2).

4. A motor bearing temperature measuring device as claimed in claim 3, characterized in that: The junction box (6) is located on one side of the motor (1), and a remote output line is fixedly connected to the side of the junction box (6).

5. A motor bearing temperature measuring device as claimed in claim 4, characterized in that: Two of the card plates (8) are provided in each group, and the connecting layer (9) is a glue layer.

6. A motor bearing temperature measuring device as claimed in claim 5, characterized in that: The sleeve (10) is made of polypropylene, and the wiring of the temperature sensor (5) penetrates through the sleeve (10).

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