Temperature measurement structure, rotor structure and motor

Abstract

The present invention provides a temperature measuring structure, a rotor structure and a motor, wherein the temperature measuring structure comprises: a temperature measuring tube, which is installed on a component to be temperature measured, and the temperature measuring tube has a temperature measuring cavity, and the temperature measuring cavity is used to be filled with a temperature measuring liquid; a temperature measuring rod, which comprises a rod body and a sensing part connected to each other, and the sensing part is arranged outside the temperature measuring tube, and the temperature measuring liquid drives the rod body to move along the extension direction of the rod body under the action of thermal expansion and contraction, and at least part of the rod body is movably arranged in the temperature measuring cavity and blocks the temperature measuring cavity; a position detection part, which is arranged relative to the sensing part, and the position detection part is used to detect the position of the sensing part. The technical solution provided by the present invention can solve the problem that the temperature detection structure using an infrared temperature measuring probe in the prior art is easily affected because it is too close to the magnetic or charged part of the motor.

Description

Technical Field

[0001] The present invention relates to the technical field of temperature detection structures for magnetic steel, and in particular to a temperature measurement structure, a rotor structure and a motor. Background Art

[0002] At present, when a high-speed permanent magnet motor is running, the rotor will be subjected to huge centrifugal force, and its structural safety problem is prominent. Among them, the surface-mounted rotor needs to apply pre-pressure to the magnetic steel through the sheath to achieve the purpose of protecting the magnetic steel. Carbon fiber has high strength, low density, low electrical conductivity, and is not easy to generate eddy currents to cause additional losses, so it is an ideal material for rotor sheaths. At present, a large number of high-difficulty and high-speed permanent magnet motors have adopted carbon fiber sheaths. The radial thermal conductivity of the carbon fiber sheath is extremely poor, which makes it impossible for the heat generated by the eddy current of the magnetic steel to dissipate in time, and it is more likely to cause the temperature of the magnetic steel to rise too high, thereby causing demagnetization. In the prior art, there is an infrared temperature measuring probe for detecting the temperature of the magnetic steel, and the infrared temperature measuring probe is a non-contact temperature measurement.

[0003] However, when measuring temperature, the infrared temperature probe often needs to ensure that the distance between it and the object being measured is close enough to achieve accurate temperature measurement. This will cause the infrared temperature probe to be very close to the stator and rotor and other charged and magnetic components inside the motor. In this way, during the operation of the motor, the infrared temperature probe is easily affected by the charged and magnetic components. In the mildest case, the infrared detection head is affected by the alternating electromagnetic field and its normal operation is affected. In the worst case, the charged components may cause electrical breakdown with the probe, and the magnetic components may have a large suction force and change the pre-installation angle of the infrared temperature probe. Summary of the invention

[0004] The main purpose of the present invention is to provide a temperature measuring structure, a rotor structure and a motor to solve the problem in the prior art that the temperature detection structure using an infrared temperature measuring probe is easily affected because it is too close to the magnetic or charged parts of the motor.

[0005] In order to achieve the above object, according to one aspect of the present invention, a temperature measurement structure is provided, comprising:

[0006] A temperature measuring tube is installed on the component to be temperature measured, and the temperature measuring tube has a temperature measuring cavity, and the temperature measuring cavity is used to be filled with a temperature measuring liquid;

[0007] The temperature measuring rod comprises a rod body and a sensing part connected to each other, the sensing part is arranged outside the temperature measuring tube, the temperature measuring liquid drives the rod body to move along the extension direction of the rod body under the action of thermal expansion and contraction, and at least part of the rod body is movably arranged in the temperature measuring cavity and blocks the temperature measuring cavity;

[0008] The position detection member is arranged opposite to the sensing part and is used to detect the position of the sensing part.

[0009] Furthermore, the temperature measuring cavity comprises a first communicating cavity and a second communicating cavity which are interconnected, the flow cross section of the first communicating cavity is larger than the flow cross section of the second communicating cavity, at least a portion of the rod body is adapted to the shape of the second communicating cavity, and at least a portion of the rod body is movably disposed in the second communicating cavity and blocks the second communicating cavity;

[0010] Wherein, the length of the rod body is less than or equal to the length of the second connecting cavity.

[0011] Furthermore, the sensing part is a sensing sheet, which is protruding from the periphery of the rod body, and the sensing sheet is adapted to the shape of the end of the temperature measuring tube so as to be attached to the end of the temperature measuring tube.

[0012] Further, the sensing part is made of metal material or alloy material; and / or,

[0013] The temperature measuring tube is made of glass or ceramic with thermal conductivity; and / or,

[0014] The position detection element is a laser detection element.

[0015] According to another aspect of the present invention, there is provided a rotor structure, comprising:

[0016] magnetic steel;

[0017] The temperature measuring structure provided above is used to be connected with the magnetic steel to measure the temperature of the magnetic steel.

[0018] Furthermore, there are multiple magnetic steels, the temperature measuring structure is arranged between two adjacent magnetic steels, and the temperature measuring structure is connected to at least one of the two adjacent magnetic steels; or,

[0019] The temperature measuring structure is attached to the magnetic steel.

[0020] Furthermore, the rotor structure also includes:

[0021] The rotor shaft core is provided with an installation groove matched with the shape of the temperature measuring structure, and at least a part of the temperature measuring structure is installed in the installation groove.

[0022] Furthermore, a magnetic steel slot is provided on the rotor shaft core, the magnetic steel is installed in the magnetic steel slot, the magnetic steel slot is connected to the mounting slot, a part of the temperature measuring structure is installed in the mounting slot, and another part of the temperature measuring structure extends into the magnetic steel slot.

[0023] Further, a part of the temperature measuring structure is bonded in the mounting groove; and / or,

[0024] Another part of the temperature measuring structure is bonded in the magnetic steel groove; and / or,

[0025] The temperature measuring structure, the magnetic steel and the rotor shaft core are connected by glue pouring, so that the gap in the magnetic steel groove and / or the installation groove is filled with the glue of the glue pouring.

[0026] Further, there are multiple mounting grooves, and the multiple mounting grooves are spaced apart along the circumferential direction of the rotor shaft core; and / or,

[0027] The sensing part is flush with the end of the installation slot or extends out of the end of the installation slot.

[0028] Furthermore, the rotor shaft core comprises:

[0029] Body part;

[0030] The boss portion is arranged on the main body portion, the boss portion protrudes from the main body portion, and a magnetic steel groove is arranged in the middle of the boss portion;

[0031] Wherein, a mounting groove is provided at a portion of the boss portion located on one side of the magnetic steel groove; and / or,

[0032] A mounting groove is provided at a portion of the boss portion located on the other side of the magnetic steel groove.

[0033] Furthermore, the temperature measuring structure is the temperature measuring structure provided above, and the length of the second connecting cavity of the temperature measuring structure is the same as the length of the installation groove.

[0034] According to yet another aspect of the present invention, there is provided a motor, comprising the rotor structure provided above.

[0035] By applying the technical solution of the present invention, the temperature of the structure to be measured can be effectively obtained by converting the change in temperature into the change in the position of the temperature measuring rod and detecting the position of the temperature measuring rod through the position detection member. The detection of the position only requires that the detection part of the position detection member is set toward the sensing part, and there is no need to keep a small distance between the position detection member and the sensing part, so that a sufficient separation distance can be ensured between the position detection member and the sensing part, and the influence of the charged parts or magnetic parts of the motor on the normal operation of the position detection member can be effectively avoided. Therefore, the temperature measurement structure provided by this embodiment can solve the problem that the temperature detection structure using an infrared temperature measurement probe in the prior art is easily affected by the close distance to the magnetic or charged parts of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0037] Figure 1 A schematic diagram of the structure of a temperature measurement structure provided according to an embodiment of the present invention is shown;

[0038] Figure 2A schematic diagram showing the movement of the temperature measuring rod of the temperature measuring structure provided by an embodiment of the present invention extending out of the temperature measuring cavity is shown;

[0039] Figure 3 A schematic diagram showing the movement of the temperature measuring rod of the temperature measuring structure provided by an embodiment of the present invention retracting into the temperature measuring cavity;

[0040] Figure 4 A cross-sectional view of a temperature measurement structure provided according to an embodiment of the present invention is shown;

[0041] Figure 5 A schematic diagram of the installation of a temperature measuring structure and a position detection element provided according to an embodiment of the present invention is shown;

[0042] Figure 6 A schematic structural diagram of a rotor shaft core provided according to an embodiment of the present invention is shown;

[0043] Figure 7 A schematic diagram showing a structure in which a temperature measuring structure provided in an embodiment of the present invention is installed on a rotor shaft core;

[0044] Figure 8 Shows Figure 7 A cross-sectional view of

[0045] Fig. 9 A schematic diagram of a temperature measurement structure provided by an embodiment of the present invention and a structure in which a magnetic steel is installed on a rotor shaft core is shown;

[0046] Fig.10 Shows Fig. 9 A cross-sectional view of

[0047] Fig.11 Shows Fig.10 AA direction schematic diagram;

[0048] Fig.12 Shows Fig.11 A local enlarged view of point I in FIG.

[0049] The above drawings include the following reference numerals:

[0050] 10. Temperature measuring structure; 11. Temperature measuring tube; 111. Temperature measuring cavity; 1111. First connecting cavity; 1112. Second connecting cavity; 12. Temperature measuring rod; 121. Rod body; 122. Sensing part; 13. Temperature measuring liquid;

[0051] 20. Magnetic steel;

[0052] 30. rotor shaft core; 31. mounting groove; 32. magnetic steel groove; 33. main body; 34. boss;

[0053] 40. Sheath;

[0054] 50. Glue;

[0055] 60. Position detection component; 70. Stator. DETAILED DESCRIPTION

[0056] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0057] like Figures 1 to 5 As shown, an embodiment of the present invention provides a temperature measuring structure 10, which includes a temperature measuring tube 11, a temperature measuring rod 12 and a position detection member 60. The temperature measuring tube 11 is installed on the component to be temperature-measured. The temperature measuring tube 11 has a temperature measuring cavity 111, and the temperature measuring cavity 111 is used to be filled with a temperature measuring liquid 13. The temperature measuring rod 12 includes a rod body 121 and a sensing part 122 connected to each other. The sensing part 122 is arranged outside the temperature measuring tube 11. The temperature measuring liquid 13 drives the rod body 121 to move along the extension direction of the rod body 121 under the action of thermal expansion and contraction. At least part of the rod body 121 is movably arranged in the temperature measuring cavity 111 and blocks the temperature measuring cavity 111. The position detection member 60 is arranged opposite to the sensing part 122, and the position detection member 60 is used to detect the position of the sensing part 122.

[0058] By adopting the temperature measuring structure 10 provided in this embodiment, by converting the temperature change into the change of the position of the temperature measuring rod 12, and detecting the position of the temperature measuring rod 12 through the position detection member 60, it is possible to effectively obtain the temperature of the structure 10 to be measured. The detection of the position only needs to ensure that the detection part of the position detection member 60 is set toward the sensing part 122, and there is no need to keep a small distance between the position detection member 60 and the sensing part 122, so that it can ensure that there is a sufficient separation distance between the position detection member 60 and the sensing part 122, and then effectively avoid the influence of the charged parts or magnetic parts on the normal operation of the position detection member. Therefore, the temperature measuring structure 10 provided in this embodiment can solve the problem that the temperature detection structure using the infrared temperature measuring probe in the prior art is easily affected by being too close to the magnetic or charged part of the motor.

[0059] In this embodiment, the temperature measuring chamber 111 includes a first connecting chamber 1111 and a second connecting chamber 1112 which are interconnected. The flow cross section of the first connecting chamber 1111 is larger than the flow cross section of the second connecting chamber 1112. At least part of the rod body 121 is adapted to the shape of the second connecting chamber 1112. At least part of the rod body 121 is movably arranged in the second connecting chamber 1112 and blocks the second connecting chamber 1112. Among them, the length of the rod body 121 is less than or equal to the length of the second connecting chamber 1112. With such a structural setting, it is convenient to make the position change of the temperature measuring rod 12 more obvious, so as to facilitate more accurate acquisition of the temperature of the component to be measured, and improve the detection accuracy of the temperature of the component to be measured. In addition, by making the length of the rod body 121 less than or equal to the length of the second connecting chamber 1112, it is convenient to effectively promote the movement of the rod body 121, and avoid the situation where part of the rod body 121 cannot effectively act on the rod body 121 due to extending into the first connecting chamber 1111, thereby improving the temperature measurement accuracy of the temperature measuring structure 10.

[0060] In this embodiment, the sensing portion 122 is a sensing sheet, which is protruding from the periphery of the rod body 121. The sensing sheet is adapted to the shape of the end of the temperature measuring tube 11 so as to be attached to the end of the temperature measuring tube 11. With such a structural arrangement, the area of ​​the sensing sheet can be increased, so that the position detection member 60 can better detect the position of the sensing sheet.

[0061] Specifically, the sensing piece has a pasting position for pasting on the end of the temperature measuring tube 11 and a separation position spaced apart from the end of the temperature measuring tube 11. Generally, when the motor is not running, the temperature of the temperature measuring structure 10 is at room temperature (which can be understood as between 25°C and 35°C) or lower than room temperature, and the sensing piece is in the pasting position; when the motor runs to a higher temperature, the sensing piece moves to the separation position, and the distance between the sensing piece and the end of the temperature measuring tube 11 depends on the temperature of the component to be measured. When the temperature of the component to be measured is higher, the corresponding distance between the sensing piece and the end of the temperature measuring tube 11 is larger.

[0062] In this embodiment, the sensing part 122 is made of a metal material or an alloy material, so as to form a good reflectivity, so as to facilitate detection by the position detection member 60. Specifically, the sensing part 122 is made of a metal or alloy with good machinability. Preferably, the sensing part 122 can have a good reflectivity to visible light, infrared light or ultraviolet light after processing, so as to facilitate detection of the position of the sensing part 122 by the position detection member 60.

[0063] Specifically, the temperature measuring tube 11 is made of glass or ceramic with thermal conductivity, so as to effectively transfer the heat on the component to be measured to the temperature measuring structure 10 , thereby facilitating improving the temperature measurement accuracy of the temperature measuring structure 10 .

[0064] In this embodiment, the position detection element 60 is a laser detection element. With such a structural setting, since laser ranging does not have a requirement for distance, the detection probe of the laser detection element can be set at a place far away from the stator 70 structure and the rotor structure of the motor, and there is no need to consider the effective test distance, and therefore it does not need to be set within the influence range of the armature electromagnetic field of the stator 70 structure and the rotor structure, so that the accuracy of the temperature measurement data will not be affected.

[0065] The temperature information of the rotor magnet 20 is converted into the position information of the reflector (corresponding to the sensing part 122) located at the end of the temperature measuring tube 11. The position of the reflector is measured by a ranging probe based on the alternating magnetic field of the stator and rotor of the principle motor, thereby calculating the temperature of the rotor magnet 20 and realizing rotor temperature measurement.

[0066] Specifically, the material of the temperature measuring tube 11 in this embodiment should be glass or ceramic with a small thermal expansion coefficient and a certain thermal conductivity; the temperature measuring liquid 13 should be a liquid with a relatively constant thermal expansion coefficient in the target temperature measuring range and not easy to solidify or vaporize; the material of the sensing part 122 should be a metal or alloy with good processability and good reflectivity of the surface to visible light or infrared / ultraviolet light after processing. The inner diameter of the first connecting cavity 1111 is large and can accommodate more temperature measuring liquid 13, and the inner diameter of the second connecting cavity 1112 is much smaller than the first connecting cavity 1111; the sensing part 122 is a thin sheet-like part outside the temperature measuring tube 11, and the inner diameter of the rod body 121 is small, and the extension length of the rod body 121 shall not exceed the total length of the second connecting cavity 1112. The temperature measuring liquid 13 and the rod body 121 completely fill at least part of the internal space of the second connecting cavity 1112, and no gas bubbles shall be left.

[0067] Specifically, during the trial production of the rotor structure, a portion of the temperature measuring tube 11 is first glued to the mounting groove 31 with glue, the sensing portion 122 is exposed to the outside of the boss portion 34, and the other portion of the temperature measuring structure 10 extends into the magnetic steel groove 32. Specifically, the thickness of the mounting groove 31 is the same as the length of the second connecting cavity 1112 (i.e., the length dimension a in the figure), and the length of the first connecting cavity 1111 is half of the axial length of the magnetic steel groove 32. At this time, the sensing portion 122 is substantially flush with the end surface of the boss.

[0068] After all the temperature measuring tubes 11 are installed, the magnetic steel 20 is glued to the surface of the magnetic steel slot 32. After the curing is completed, the rotor should be filled with glue to completely fill the gap between the temperature measuring tube 11 and the magnetic steel 20 in the temperature measuring tube 11 slot and the magnetic steel slot 32. Finally, the sheath 40 made of carbon fiber is wrapped around the outside of the rotor, and the temperature measuring structure 10, the magnetic steel 20, the installation slot 31, and the magnetic steel slot 32 are filled with glue.

[0069] Specifically, when the temperature changes, the position of the sensing part 122 will change due to the thermal expansion and contraction of the temperature measuring liquid 13. When the temperature rises, the volume of the temperature measuring liquid 13 expands. Although the expansion ratio is not large relative to the temperature measuring liquid 13 as a whole, the expanded volume will eventually enter the second connecting cavity 1112, pushing the sensing part 122 outward. The expanded liquid occupies a larger axial length in the second connecting cavity 1112 with a small tube diameter. Therefore, the position change of the sensing part 122 will be relatively more obvious. The same is true when the temperature drops and the volume of the temperature measuring liquid 13 shrinks. According to the position of the sensing part 122, the temperature of the temperature measuring liquid 13 at this time can be calculated, that is, the approximate temperature of the magnetic steel 20.

[0070] At the same time, since laser ranging does not require distance, the ranging probe can be set at a distance from the stator and rotor, and does not need to be set within the influence range of the electromagnetic field of the stator and rotor armature like a Bluetooth transmitter or an infrared temperature measuring probe, and thus will not affect the accuracy of the temperature measurement data. The optimal embodiment of this scheme is described with a structure in which a group of temperature measuring tubes 11 are set on both sides of the magnetic steel 20, but if the axial length of the magnetic steel 20 is short, it is not necessary to set the temperature measuring structure 10 on both sides, and only one side can be set; at the same time, the number of a group of temperature measuring structures 10 should also be adjusted with the number of magnetic steels 20.

[0071] Specifically, the installation slot 31 does not have to be set in the middle of adjacent magnetic steels 20. The installation slot 31 can also be located at a position close to the magnetic steel 20, such as the bottom of the magnetic steel slot 32. The specific position setting can be determined according to the rotor requirements.

[0072] like Figures 6 to 12 As shown, the second embodiment of the present invention provides a rotor structure, which includes a magnetic steel 20 and the temperature measuring structure 10 provided above, and the temperature measuring structure 10 is used to be connected with the magnetic steel 20 to measure the temperature of the magnetic steel 20. With such a structural setting, it is convenient to accurately detect the temperature of the magnetic steel 20.

[0073] In this embodiment, there are multiple magnetic steels 20, and the temperature measuring structure 10 is arranged between two adjacent magnetic steels 20, and the temperature measuring structure 10 is connected to at least one of the two adjacent magnetic steels 20. With such a structural arrangement, it is possible to more accurately detect the temperatures of multiple magnetic steels 20, thereby improving the accuracy of detecting the temperatures of the magnetic steels 20.

[0074] Specifically, the temperature measuring structure 10 is attached to the magnetic steel 20 to improve the accuracy of detecting the temperature of the magnetic steel 20 .

[0075] Specifically, the rotor structure further includes a rotor shaft core 30, on which a mounting groove 31 matching the shape of the temperature measuring structure 10 is provided, and at least a portion of the temperature measuring structure 10 is installed in the mounting groove 31. With such a structural setting, it is possible to improve the installation stability of the temperature measuring structure 10, so as to ensure that the position of the temperature measuring structure 10 does not shift during the operation of the motor, thereby improving the temperature measurement accuracy of the temperature measuring structure 10.

[0076] In this embodiment, a magnetic steel slot 32 is provided on the rotor shaft core 30, the magnetic steel 20 is installed in the magnetic steel slot 32, the magnetic steel slot 32 is connected to the installation slot 31, a part of the temperature measuring structure 10 is installed in the installation slot 31, and another part of the temperature measuring structure 10 extends into the magnetic steel slot 32. With such a structural setting, it is convenient to effectively optimize the setting position of the temperature measuring structure 10, which can not only improve the installation stability of the temperature measuring structure 10, but also effectively ensure the connection with the magnetic steel 20, and improve the detection accuracy of the temperature of the magnetic steel 20.

[0077] Specifically, the mounting groove 31 is spaced apart from the magnetic steel groove 32. Alternatively, the mounting groove 31 is disposed on the magnetic steel groove 32 to dispose a portion of the temperature measuring structure 10 between the magnetic steel groove 32 and the magnetic steel 20. Preferably, the mounting groove 31 in this embodiment is spaced apart from the magnetic steel groove 32.

[0078] Specifically, a portion of the temperature measuring structure 10 is bonded in the mounting groove 31 to improve the installation stability of the temperature measuring structure 10 in the mounting groove 31 .

[0079] Specifically, another portion of the temperature measuring structure 10 is bonded into the magnetic steel groove 32 to improve the installation stability of the temperature measuring structure 10 .

[0080] Specifically, the temperature measuring structure 10, the magnetic steel 20 and the rotor shaft core 30 are connected by glue pouring, so that the gap in the magnetic steel slot 32 and / or the installation slot 31 is filled with glue 50. With such a structural setting, it is convenient to better improve the overall installation stability of the temperature measuring structure 10, so as to ensure that the position of the temperature measuring structure 10 does not deviate or loosen during the operation of the motor, so as to better ensure the accuracy of temperature measurement.

[0081] Specifically, the other part of the temperature measuring structure 10 is first bonded in the magnetic steel slot 32. After the bonding is firm, the temperature measuring structure 10, the magnetic steel 20 and the rotor shaft core 30 are glued to fully fill the gaps in the magnetic steel slot 32 and the installation slot 31 with the glue 50 of the glue, and finally the outer side of the rotor structure is wrapped with a sheath 40. Specifically, the sheath 40 is made of carbon fiber material.

[0082] In this embodiment, there are multiple mounting grooves 31, and the multiple mounting grooves 31 are spaced along the circumference of the rotor shaft core 30. With such a structural arrangement, it is convenient to better detect the temperature of multiple different parts of the circumference of the rotor shaft core 30, so as to more accurately improve the temperature detection accuracy of the rotor shaft core 30.

[0083] Specifically, the sensing portion 122 is flush with the end of the mounting slot 31 or extends beyond the end of the mounting slot 31. With such a configuration, it is convenient to effectively detect the position of the sensing portion 122, so as to improve the position detection accuracy of the sensing portion 122, thereby improving the temperature measurement accuracy of the temperature measurement structure 10.

[0084] In this embodiment, the rotor shaft core 30 includes a body portion 33 and a boss portion 34 . The boss portion 34 is disposed on the body portion 33 . The boss portion 34 protrudes from the body portion 33 . A magnetic steel slot 32 is disposed in the middle of the boss portion 34 .

[0085] The portion of the boss portion 34 located on one side of the magnetic steel slot 32 is provided with a mounting groove 31. With such a structural arrangement, it is convenient to install the temperature measuring structure 10 on the portion of the boss portion 34 located on one side of the magnetic steel slot 32, thereby facilitating effective detection of the temperature of the portion of the boss portion 34 located on one side of the magnetic steel slot 32.

[0086] Alternatively, a mounting groove 31 is provided on the portion of the boss portion 34 located on the other side of the magnetic steel groove 32, so that the temperature measuring structure 10 can be installed on the portion of the boss portion 34 located on the other side of the magnetic steel groove 32, thereby facilitating effective detection of the temperature of the portion of the boss portion 34 located on the other side of the magnetic steel 20.

[0087] Alternatively, the portion of the boss portion 34 located on one side of the magnetic steel slot 32 and the portion of the boss portion 34 located on the other side of the magnetic steel slot 32 are both provided with mounting grooves 31, so that the portions of the boss portion 34 located on both sides of the magnetic steel slot 32 can be conveniently provided with temperature measuring structures 10, so that it is convenient to detect the temperature of the magnetic steel 20 in the magnetic field slot with a longer length, thereby facilitating better improvement of the accuracy of temperature detection of the magnetic steel 20. Specifically, when such a setting is adopted, the portion of the boss portion 34 located on one side of the magnetic steel slot 32 can be provided with a plurality of mounting grooves 31 in an annular manner, the portion of the boss portion 34 located on the other side of the magnetic steel slot 32 can be provided with a plurality of mounting grooves 31 in an annular manner, the plurality of mounting grooves 31 located on both sides of the magnetic steel slot 32 are provided one by one, and each mounting groove 31 of the portion of the boss portion 34 located on one side of the magnetic steel slot 32 is relatively provided with the corresponding mounting groove 31 of the portion of the boss portion 34 located on the other side of the magnetic steel slot 32. In this way, a temperature measuring structure 10 is respectively provided at the two opposite installation grooves 31, and the length of each temperature measuring structure 10 in the magnetic steel groove 32 is half of the total length of the magnetic steel groove 32. In this way, the two opposite temperature measuring structures 10 can completely fill the two opposite installation grooves 31 and the magnetic steel groove 32 located between the two opposite installation grooves 31.

[0088] In this embodiment, the temperature measuring structure 10 is the temperature measuring structure 10 provided above, and the length of the second connecting cavity 1112 of the temperature measuring structure 10 is the same as the length of the mounting groove 31. With such a structural setting, it is possible to prevent the temperature of the magnetic steel 20 from directly acting on the second connecting cavity 1112, and to make the corresponding part of the first connecting cavity 1111 contact with the magnetic steel 20 as much as possible, thereby affecting the temperature measurement accuracy of the temperature measuring structure 10.

[0089] Specifically, when the total length of the temperature measuring structure 10 remains unchanged, and the second connecting cavity 1112 is longer than the length of the mounting groove 31, the second connecting cavity 1112 will occupy too much of the original part of the first connecting cavity 1111, thereby shortening the length of the first connecting cavity 1111, making it inconvenient to completely measure the temperature of all magnetic steels, and reducing the detection accuracy of the temperature measuring structure 10. When the total length of the temperature measuring structure 10 remains unchanged, and the second connecting cavity 1112 is shorter, part of the first connecting cavity 1111 will extend into the mounting groove 31, which will affect the temperature measurement result by the mounting groove 31, thereby affecting the accuracy of the temperature measurement. When the length of the first connecting cavity 1111 remains unchanged, and the length of the second connecting cavity 1112 is longer, part of the temperature measuring tube 11 will extend out of the boss portion 34, and the temperature measuring tube 11 will not be protected by the sheath 40, and there is a risk of structural damage to the temperature measuring tube 11, thereby causing the temperature measuring structure 10 to fail to work normally. When the length of the first connecting cavity 1111 remains unchanged and the length of the second connecting cavity 1112 is shorter, the temperature measuring tube 11 may retract into the installation groove 31. In this way, when the sheath 40 is wrapped, part of the adhesive may stick the temperature measuring rod 12 to the temperature measuring tube 11, thereby causing the temperature measuring rod 12 to be unable to retract normally, thereby causing the temperature measuring structure 10 to be unable to work normally.

[0090] Specifically, the mounting groove 31 and the magnetic steel groove 32 are spaced apart from each other.

[0091] It should be noted that “the length of the second connecting cavity 1112 of the temperature measuring structure 10 is the same as the length of the mounting groove 31” can be understood as the length of the second connecting cavity 1112 of the temperature measuring structure 10 differs from the length of the mounting groove 31 by less than or equal to 5 mm. Preferably, the length of the second connecting cavity 1112 of the temperature measuring structure 10 differs from the length of the mounting groove 31 by less than or equal to 1 mm.

[0092] A third embodiment of the present invention provides a motor, which includes the rotor structure provided in the second embodiment above.

[0093] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects: the temperature measuring structure is not easy to wear, the installation is convenient and safe, there is no need to add an additional power supply to the rotor, and the temperature data of the temperature measuring structure is not affected by the electromagnetic field of the motor, so as to realize the real-time monitoring of the temperature of the carbon fiber rotor magnetic steel. The temperature measuring structure can realize convenient and accurate installation and real-time temperature measurement. The temperature measuring tube and the magnetic steel are in contact with each other, and the magnetic steel can conduct heat to the temperature measuring tube to keep the temperature of the two consistent; and the temperature measuring tube makes the external sensing part in different positions at different temperatures through the thermal expansion and contraction of the internal temperature measuring liquid, and there is a certain law between the change of the position of the sensing part and the change of the temperature, so the temperature measuring tube converts the temperature signal into a position signal, and then a distance measuring device such as a laser distance measuring device is set on the side away from the armature to measure the position of the sensing part, so that the real-time temperature of the rotor magnetic steel can be calculated, and the temperature signal is converted into a position signal, and the temperature measurement is realized by distance measurement.

[0094] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0095] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the application. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0096] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0097] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0098] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0099] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A rotor structure, characterized in that: include: Temperature measurement structure, including: A temperature measuring tube (11), the temperature measuring tube (11) having a temperature measuring cavity (111), the temperature measuring cavity (111) being filled with a temperature measuring liquid (13); A temperature measuring rod (12), comprising a rod body (121) and a sensing part (122) connected to each other, wherein the sensing part (122) is arranged outside the temperature measuring tube (11), and the temperature measuring liquid (13) drives the rod body (121) to move along an extension direction of the rod body (121) under the action of thermal expansion and contraction, and at least a part of the rod body (121) is movably arranged in the temperature measuring cavity (111) to seal the temperature measuring cavity (111); a position detection member (60), the position detection member (60) being arranged opposite to and spaced from the sensing portion (122), the position detection member (60) being used to detect the position of the sensing portion (122); A magnetic steel (20), wherein the temperature measurement structure is used to be connected to the magnetic steel (20) so as to measure the temperature of the magnetic steel (20); A rotor shaft core (30), wherein a mounting groove (31) matching the shape of the temperature measuring structure is provided on the rotor shaft core (30), and at least a portion of the temperature measuring structure is mounted in the mounting groove (31); The rotor shaft core (30) is provided with a magnetic steel slot (32), the magnetic steel (20) is installed in the magnetic steel slot (32), the magnetic steel slot (32) is communicated with the mounting slot (31), a part of the temperature measuring structure is installed in the mounting slot (31), and another part of the temperature measuring structure extends into the magnetic steel slot (32); The rotor shaft core (30) comprises: Body part (33); a boss portion (34) disposed on the main body portion (33); the boss portion (34) protrudes from the main body portion (33); and the magnetic steel groove (32) is disposed in the middle of the boss portion (34); The mounting groove (31) is provided at a portion of the boss portion (34) located on one side of the magnetic steel groove (32) and / or at a portion of the boss portion (34) located on the other side of the magnetic steel groove (32).

2. The rotor structure according to claim 1, characterized in that: The temperature measuring cavity (111) comprises a first communicating cavity (1111) and a second communicating cavity (1112) which are interconnected, the flow cross section of the first communicating cavity (1111) is larger than the flow cross section of the second communicating cavity (1112), at least a portion of the rod body (121) is adapted to the shape of the second communicating cavity (1112), and at least a portion of the rod body (121) is movably disposed in the second communicating cavity (1112) to seal the second communicating cavity (1112); Wherein, the length of the rod body (121) is less than or equal to the length of the second connecting cavity (1112).

3. The rotor structure according to claim 1, characterized in that: The sensing portion (122) is a sensing sheet, the sensing sheet is arranged to protrude from the periphery of the rod body (121), and the sensing sheet is adapted to the shape of the end of the temperature measuring tube (11) so as to be attached to the end of the temperature measuring tube (11).

4. The rotor structure according to any one of claims 1 to 3, characterized in that: The sensing portion (122) is made of a metal material or an alloy material; and / or, The temperature measuring tube (11) is made of glass or ceramic with thermal conductivity; and / or, The position detection component (60) is a laser detection component.

5. The rotor structure according to claim 1, characterized in that: There are a plurality of magnetic steels (20), the temperature measuring structure is disposed between two adjacent magnetic steels (20), and the temperature measuring structure is connected to at least one of the two adjacent magnetic steels (20); or, The temperature measuring structure is attached to the magnetic steel (20).

6. The rotor structure according to claim 1, characterized in that: A portion of the temperature measuring structure is bonded in the mounting groove (31); and / or, Another part of the temperature measuring structure is bonded in the magnetic steel groove (32); and / or, The temperature measuring structure, the magnetic steel (20) and the rotor shaft core (30) are connected by glue pouring, so that the gap in the magnetic steel slot (32) and / or the installation slot (31) is filled with glue from the glue pouring.

7. The rotor structure according to claim 1, characterized in that: There are a plurality of mounting grooves (31), and the plurality of mounting grooves (31) are spaced apart along the circumferential direction of the rotor shaft core (30); and / or, The sensing portion (122) is arranged flush with the end of the mounting groove (31) or extends beyond the end of the mounting groove (31).

8. The rotor structure according to claim 1, characterized in that: The temperature measuring cavity (111) comprises a first communicating cavity (1111) and a second communicating cavity (1112) which are interconnected, the flow cross section of the first communicating cavity (1111) is larger than the flow cross section of the second communicating cavity (1112), at least a portion of the rod body (121) is adapted to the shape of the second communicating cavity (1112), and at least a portion of the rod body (121) is movably disposed in the second communicating cavity (1112) to seal the second communicating cavity (1112); The length of the rod body (121) is less than or equal to the length of the second connecting cavity (1112), and the length of the second connecting cavity (1112) of the temperature measurement structure is the same as the length of the installation groove (31).

9. A motor, characterized in that: A rotor structure comprising any one of claims 1 to 8.

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