Temperature measuring structure of motor rotor and motor

Abstract

The utility model relates to a motor rotor temperature measurement structure and a motor, the motor rotor temperature measurement structure comprises a rotor end plate and a rotor body, the rotor end plate and the rotor body are tightly attached, the rotor end plate is provided with at least one recessed accommodating groove, and the accommodating groove is used for placing temperature measurement test paper. By adopting the scheme, the rotor end plate and the rotor body are tightly attached, and the rotor end plate is positioned at the end part of the rotor body, so that the rotor end plate is simpler to disassemble, the temperature of the rotor body can be fed back according to the measured temperature of the rotor end plate, and the temperature measured by the temperature measurement test paper can be used as the temperature of the rotor body; the temperature of the rotor body can be conveniently detected, the influence on the rotation of the rotor body when the temperature measuring test paper is directly mounted on the rotor body can be avoided, and the rotor body is also prevented from being dismounted; the rotor end plate is provided with the accommodating groove for accommodating the temperature measurement test paper, the concave accommodating groove facilitates the placement of the temperature measurement test paper, the stability of the temperature measurement test paper after the temperature measurement test paper is placed can be improved, and the condition that the temperature measurement test paper is thrown out is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of motor rotors, in particular to a temperature measurement structure of a motor rotor and a motor. Background Art

[0002] During the operation of the motor, such as in a permanent magnet synchronous motor, eddy current loss and hysteresis loss will be generated in the permanent magnets on the rotor that play an excitation role, causing the temperature of the permanent magnets to rise, thereby causing the inflection point of the demagnetization curve of the permanent magnet material to shift, which may cause the permanent magnets to demagnetize due to the influence of the external magnetic field, causing the motor performance to deteriorate and the life to be shortened, and even causing the motor to fail in severe cases; in addition, during the operation of the motor, the bearings will increase in temperature due to mechanical friction and other reasons, and excessive temperature rise differences between the inner and outer rings of the bearings will lead to a reduction in bearing clearance, which may lead to bearing failure in severe cases, affecting the normal operation of the vehicle.

[0003] If the actual temperature of the rotor body and the inner ring of the bearing can be monitored in real time, then when the rotor temperature of the motor is too high or the temperature difference between the inner and outer rings of the bearing is too large, effective measures can be taken to avoid bearing failure, motor performance degradation and shortened life caused by permanent magnet demagnetization and large temperature difference between the inner and outer rings of the bearing. Therefore, real-time and accurate monitoring of the rotor temperature of the permanent magnet synchronous motor is very important for vehicle operation, motor performance assurance, reliability and life.

[0004] However, the existing method of measuring the temperature of the rotor is relatively complicated, resulting in excessively high costs for implementing the temperature measurement, which is not conducive to cost control. Utility Model Content

[0005] Based on this, a temperature measurement structure of a motor rotor and a motor are provided to improve the problem that the temperature measurement method of the rotor in the prior art is relatively complicated, resulting in high temperature measurement costs.

[0006] On the one hand, the utility model provides a temperature measurement structure of a motor rotor, including a rotor end plate and a rotor body, the rotor end plate and the rotor body are tightly fitted, and at least one concave receiving groove is opened on the rotor end plate, and the receiving groove is used to place a temperature measuring test paper.

[0007] On the basis of the above technical solution, the present invention can also be improved as follows.

[0008] In one embodiment, the depth of the receiving groove is greater than the thickness of the temperature measuring test paper.

[0009] In one of the embodiments, one side of the accommodating groove on the rotor end plate is arranged parallel to the bottom of the accommodating groove.

[0010] In one embodiment, the receiving groove is in the shape of a truncated cone.

[0011] In one of the embodiments, of the two parallel planes of the truncated cone structure of the receiving groove, the larger plane is the groove bottom of the receiving groove.

[0012] In one embodiment, the rotor end plate is in an annular shape, and the receiving grooves are all located on the plane of the rotor end plate.

[0013] In one embodiment, one side of the rotor end plate where the receiving groove is formed is in contact with the rotor body.

[0014] In one embodiment, there are four receiving grooves, which are evenly distributed around the circumference of the rotor end plate.

[0015] In one of the embodiments, a concave strip-shaped stabilizing groove is also provided on the plane where the accommodating groove is located, and the stabilizing groove is evenly arranged on the circumference of the rotor end plate.

[0016] On the other hand, the utility model also provides a motor, including a temperature measurement structure of a motor rotor

[0017] The beneficial effects of the utility model are as follows: the rotor end plate and the rotor body are set to be tightly fitted, and the rotor end plate is located at the end of the rotor body, so that the disassembly of the rotor end plate is simpler, so that the temperature of the rotor body can be fed back according to the measured temperature of the rotor end plate, that is, the temperature measured by the temperature measuring paper can be used as the temperature of the rotor body, which is convenient for detecting the temperature of the rotor body, and can also avoid the influence on the rotation of the rotor body when the temperature measuring paper is directly installed on the rotor body, and also avoid the disassembly of the rotor body; a receiving groove is provided on the rotor end plate to place the temperature measuring paper, and the concave receiving groove is convenient for the insertion of the temperature measuring paper, and can also improve the stability of the temperature measuring paper after insertion, and reduce the situation where the temperature measuring paper is thrown out. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the structure of the temperature measurement structure of the motor rotor in one embodiment;

[0019] Figure 2 It is a schematic cross-sectional structure diagram of the location of the accommodation groove in another embodiment.

[0020] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0021] 10. Rotor end plate; 11. Accommodating groove; 12. Stabilizing groove. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0023] Example 1

[0024] A temperature measurement structure for a motor rotor, see Figure 1 and Figure 2 , including a rotor end plate 10 and a rotor body, the rotor end plate 10 and the rotor body are closely fitted, and at least one concave receiving groove 11 is opened on the rotor end plate 10, and the receiving groove 11 is used to place the temperature measuring test paper.

[0025] The beneficial effects of this embodiment are as follows: the rotor end plate 10 and the rotor body are tightly fitted, and the rotor end plate 10 is located at the end of the rotor body, so that the disassembly of the rotor end plate 10 is simpler, so that the temperature of the rotor body can be fed back according to the measured temperature of the rotor end plate 10, that is, the temperature measured by the temperature measuring paper can be used as the temperature of the rotor body, which is convenient for detecting the temperature of the rotor body, and can also avoid the influence on the rotation of the rotor body when the temperature measuring paper is directly installed on the rotor body, and also avoid the disassembly of the rotor body; a receiving groove 11 is provided on the rotor end plate 10 to place the temperature measuring paper, and the concave receiving groove 11 is convenient for the insertion of the temperature measuring paper, and can also improve the stability of the temperature measuring paper after insertion, and reduce the situation where the temperature measuring paper is thrown out.

[0026] On the basis of the above embodiment, there is no restriction on the shape of the receiving groove 11, but the receiving groove 11 is preferably circular in shape; wherein, it is preferred to open the receiving groove on the side where the rotor end plate 10 is in contact with the rotor body, so that the temperature measuring position of the temperature measuring paper on the rotor end plate 10 is more in contact with the rotor body and closer to the rotor body, so that the temperature measuring position there is closer to the temperature of the rotor body, so that the temperature measuring result of the temperature measuring paper can better reflect the actual temperature of the rotor body, and the detection accuracy is high. For this structure, after the detection is completed, the rotor end plate 10 needs to be disassembled and removed to observe the temperature of the temperature measuring paper. color; in addition, it is also possible to choose to open a receiving groove 11 on the exposed side of the rotor end plate 10, that is, after the rotor end plate 10 and the motor are installed as a whole, the position of the receiving groove 11 is unobstructed, and the receiving groove 11 can be directly exposed. Therefore, after the temperature is measured, the color of the temperature measuring paper in the receiving groove 11 can be directly observed, so as to read the temperature fed back by the temperature measuring paper, which simplifies the difficulty of reading the temperature of the temperature measuring paper on the rotor end plate 10. When the receiving groove is exposed, the color of the temperature measuring paper can be observed, the temperature measuring paper can be installed or the temperature measuring paper can be replaced without disassembling the rotor end plate 10, thereby effectively improving the convenience of operation.

[0027] Example 2

[0028] Preferably, based on Embodiment 1, the depth of the containing groove 11 is greater than the thickness of the temperature measuring test paper.

[0029] The beneficial effect of adopting the preferred solution in the above embodiment is that the depth of the receiving groove 11 is controlled so that the depth of the receiving groove 11 is greater than the thickness of the temperature measuring paper, thereby reducing the temperature measuring paper from falling out of the receiving groove 11 and improving the stability of the temperature measuring paper after installation.

[0030] On the basis of the above embodiment, the temperature measuring test paper can be glued to the receiving groove 11 using high temperature resistant and oil resistant transparent glue. When the depth of the receiving groove 11 is greater than the thickness of the temperature measuring test paper, the transparent glue can glue the bottom and four sides of the temperature measuring test paper to the receiving groove 11, thereby increasing the bonding area between the receiving groove 11 and the temperature measuring test paper, improving the stability of the temperature measuring test paper in the receiving groove 11, and effectively preventing the temperature measuring test paper from falling out of the receiving groove 11.

[0031] Specifically, the minimum depth of the containing groove 11 may be 2 mm; the depth of the containing groove 11 is 0 mm to 1 mm greater than the thickness of the temperature measuring test paper.

[0032] Example 3

[0033] Preferably, based on Example 1-2, see Figure 1 and Figure 2 The side of the rotor end plate 10 on which the receiving groove 11 is opened is arranged parallel to the bottom of the receiving groove 11 .

[0034] The beneficial effect of adopting the preferred solution in the above embodiment is that the top and bottom of the receiving groove 11 are parallel, which improves the uniformity of the structure of the receiving groove 11, facilitates the processing of the receiving groove 11, and also facilitates the placement of the temperature measuring test paper.

[0035] On the basis of the above embodiment, the size of the top surface and the bottom surface of the receiving groove 11 may be the same or different; when the size of the top surface and the bottom surface of the receiving groove 11 are the same, the receiving groove 11 is circular, and the processing of the receiving groove 11 is simple, convenient, and efficient; when the top surface area of ​​the receiving groove 11 is larger than the bottom surface area, it is convenient to place and remove the temperature measuring paper; when the top surface area of ​​the receiving groove 11 is smaller than the bottom surface area, the temperature measuring paper can be prevented from falling out.

[0036] Example 4

[0037] Preferably, based on Example 3, see Figure 1 and Figure 2 , the receiving groove 11 is in the shape of a truncated cone.

[0038] The beneficial effect of adopting the preferred solution in the above embodiment is that the receiving groove 11 is in the shape of a truncated cone, which is convenient for inserting the temperature measuring test paper. The structure of the truncated cone is uniform, which also facilitates the processing of the receiving groove 11.

[0039] Example 5

[0040] Preferably, on the basis of Embodiment 4, on the basis of the above embodiments, in the two parallel planes of the truncated cone structure of the containing groove 11, the larger plane is the groove bottom of the containing groove 11; and the temperature measuring test paper is circular.

[0041] The beneficial effect of adopting the preferred scheme in the above embodiment is that since the receiving groove 11 is a truncated cone structure, the bottom area of ​​the receiving groove 11 is larger than the top area. After the temperature measuring test paper is placed in the receiving groove 11, it can prevent the temperature measuring test paper from falling out of the receiving groove 11; the temperature measuring test paper is all round, and the round temperature measuring test paper is easy to process, and when the temperature measuring test paper is installed in the receiving groove 11, it does not need to be rotated and aligned, and there is no directionality, which can improve the installation efficiency of the temperature measuring test paper.

[0042] Based on the above embodiments, see Figure 1 and Figure 2 The circumference of the circular groove bottom of the receiving groove 11 can be chamfered to facilitate the processing of the receiving groove 11.

[0043] Example 6

[0044] Preferably, based on Examples 1-5, see Figure 1 and Figure 2 The rotor end plate 10 is in a circular ring shape, and the receiving grooves 11 are all located on the plane of the rotor end plate 10 .

[0045] The beneficial effect of adopting the preferred solution in the above embodiment is that the rotor end plate 10 is annular, and the receiving groove 11 is opened on the plane of the rotor end plate 10, which is convenient for measuring and reading the temperature.

[0046] Example 7

[0047] Preferably, on the basis of Embodiment 6, one side of the rotor end plate 10 where the receiving groove 11 is formed is in contact with the rotor body.

[0048] The beneficial effect of adopting the preferred solution in the above embodiment is that one side of the receiving groove 11 is fitted with the rotor body, so that the temperature of the side of the rotor end plate 10 where the receiving groove 11 is opened is basically the same as that of the rotor body, so that the test result of the temperature measuring paper located in the receiving groove 11 can better reflect the actual temperature of the rotor body.

[0049] On the basis of the above embodiment, when used to detect the temperature of the rotor body, the temperature measuring paper is first fixed in the receiving groove 11, and then the side of the rotor end plate 10 with the receiving groove 11 is fitted and fixed to the rotor body, and then the rotor body is made to work normally. After the work is completed, the rotor end plate 10 is disassembled and the color of the temperature measuring paper is observed to read the temperature value.

[0050] Example 8

[0051] Preferably, based on Example 6, see Figure 1 and Figure 2 There are four accommodating grooves 11 , which are evenly distributed on the circumference of the rotor end plate 10 .

[0052] The beneficial effect of adopting the preferred scheme in the above embodiment is that a plurality of receiving grooves 11 are provided to improve the accuracy of temperature measurement, effectively avoid the problem of temperature measurement failure caused by damage of a single temperature measuring paper, and a plurality of temperature measuring papers can also calibrate each other; the temperature measuring papers are evenly distributed on the circumference of the rotor end plate 10, and the temperature measurement of the rotor end plate 10 is more accurate.

[0053] Based on the above embodiment, the receiving grooves 11 are arranged close to the outer wall of the rotor end plate 10; all the receiving grooves 11 are opened on a circle coaxial with the rotor end plate 10; the specific number of the receiving grooves 11 can be adjusted according to the size of the workpiece and the required precision requirements, and is not limited to four.

[0054] Example 9

[0055] Preferably, based on Examples 1-8, see Figure 1 and Figure 2 A concave strip-shaped stabilizing groove 12 is also provided on the plane where the accommodating groove 11 is located, and the stabilizing groove 12 is evenly arranged on the circumference of the rotor end plate 10 .

[0056] The beneficial effect of adopting the preferred solution in the above embodiment is that the stabilizing groove 12 is provided, so that the rotor end plate 10 can maintain balance and stability when rotating. At the same time, the groove of the stabilizing groove 12 also increases the area, which can play a role in cooling and reducing noise.

[0057] On the basis of the above-mentioned embodiment, there are multiple stabilizing grooves 12, some of which form a circular ring, some are arranged along the intersection with the circular ring, and some extend to the middle of the rotor end plate 10; the stabilizing groove 12 structure is evenly arranged on the plane of the rotor end plate 10, and the stabilizing groove 12 can be a centrally symmetrical structure.

[0058] Example 10

[0059] Preferably, based on embodiments 1-9, a motor includes a temperature measurement structure of a motor rotor.

[0060] The present application can be used in the scenario of testing the rotor body. During the test, a temperature measuring paper is embedded in the groove, a high temperature resistant and oil resistant transparent glue is applied on the temperature measuring paper, and the temperature measuring paper is fixed to the bottom of the receiving groove 11, and then the test is started; after the test is completed, the rotor end plate 10 can be disassembled, or when the receiving groove 11 of the rotor end plate 10 is in an exposed position, the rotor end plate 10 can be simply paused and the temperature of the test paper can be checked, or when the speed of the rotor end plate 10 is low, the temperature reflected by the color on the temperature measuring paper can be directly read, so that the temperature of the rotor body is indirectly obtained through the temperature of the rotor end plate 10; in the present application, the temperature measured on the rotor end plate 10 is directly used as the temperature of the rotor body, so as to obtain the required temperature data of the rotor body, which is convenient for subsequent experiments or operations.

[0061] It should be noted that the illustrations provided in this embodiment are only used to schematically illustrate the basic concept of the present invention. Therefore, the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0062] The structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0063] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0064] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0065] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0066] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0067] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0068] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A temperature measurement structure for a motor rotor, characterized in that: The invention comprises a rotor end plate (10) and a rotor body which are closely fitted together, and also comprises a temperature measuring paper, wherein the temperature measuring paper is configured to obtain the temperature fed back by the temperature measuring paper by observing the color of the temperature measuring paper, and the rotor end plate (10) is provided with at least one concave receiving groove (11), wherein the receiving groove (11) is used to place the temperature measuring paper, and the temperature measuring paper is adhered in the receiving groove (11) by means of a transparent adhesive which is resistant to high temperature and oil; The containing groove (11) is in the shape of a truncated cone. Of the two parallel planes of the truncated cone structure of the containing groove (11), the larger plane is the bottom of the containing groove (11); the bottom of the temperature measuring test paper is adhered to the containing groove (11).

2. The temperature measurement structure of the motor rotor according to claim 1, characterized in that: The depth of the containing groove (11) is greater than the thickness of the temperature measuring test paper.

3. The temperature measurement structure of the motor rotor according to claim 1, characterized in that: The side of the rotor end plate (10) on which the accommodating groove (11) is opened is arranged parallel to the bottom of the accommodating groove (11).

4. The temperature measurement structure of the motor rotor according to claim 1, characterized in that: The temperature measuring test paper is circular.

5. The temperature measurement structure of the motor rotor according to claim 1, characterized in that: The rotor end plate (10) is in the shape of a circular ring, and the accommodating grooves (11) are all located on the plane of the rotor end plate (10).

6. The temperature measurement structure of the motor rotor according to claim 5, characterized in that: The side of the rotor end plate (10) on which the accommodating groove (11) is formed is in contact with the rotor body.

7. The temperature measurement structure of the motor rotor according to claim 5, characterized in that: There are four accommodating grooves (11), which are evenly distributed on the circumference of the rotor end plate (10).

8. The temperature measurement structure of the motor rotor according to claim 1, characterized in that: A concave strip-shaped stabilizing groove (12) is also provided on the plane where the accommodating groove (11) is located, and the stabilizing groove (12) is evenly arranged on the circumference of the rotor end plate (10).

9. A motor, characterized in that: The invention comprises a temperature measuring structure of a motor rotor as described in any one of claims 1 to 8.

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