Magnetic suspension motor temperature monitoring mechanism and magnetic suspension motor

Abstract

The utility model provides a magnetic suspension motor temperature monitoring mechanism and a magnetic suspension motor, which are used for realizing temperature monitoring of a rotating shaft in the magnetic suspension motor, and comprise an elastic mounting block, a stop rod, a wireless signal transmitting assembly, a controller and an alarm device, the mounting block is provided with an inner cambered surface and an outer cambered surface which are coaxial, a temperature sensor is embedded in the inner cambered surface through a groove, and the inner cambered surface and the temperature sensor can be attached to the side face of the outer circle of the rotating shaft in shape and size; the outer cambered surface can be attached to the inner cambered surface of the carbon fiber sleeve at the rotating shaft; the abutting rods are fixed to the two ends, in the axial direction of the rotating shaft, of the mounting block and used for abutting against the magnetism isolating rings at the two ends of the magnetic steel strip. The wireless signal transmitting assembly is used for transmitting a temperature signal of the temperature sensor to the controller; the controller is used for comparing a temperature signal of the temperature sensor with a preset threshold value and can send an early warning signal indicating that the temperature is too high to the alarm device.

Description

Technical Field

[0001] The present application belongs to the field of motor technology, and in particular relates to a magnetic levitation motor temperature monitoring mechanism and a magnetic levitation motor. Background Art

[0002] In the related technical solution, the magnetic levitation motor includes an integrally formed shaft, on the outer circumferential surface of which a permanent magnet is attached to form a composite shaft structure. The composite shaft as a whole is used as the rotor of the motor, and no additional iron core is required to be provided and magnetic steel is inserted into the iron core.

[0003] The inventors learned that the rotating shaft of the magnetic levitation motor includes a rotating shaft body, and a plurality of magnetic steel strips are arranged outside the rotating shaft body. The magnetic steel strips are separated by filling blocks as magnetic isolation components, and the outer side of the magnetic steel strips are fixed with carbon fiber sleeves. One section of the rotating shaft is a magnetic steel installation section, and the magnetic steel strips are attached to the outside of the magnetic steel installation section. The outer ring fixed sleeve of the magnetic steel installation section is provided with a magnetic isolation ring, which is used to realize the stop limit of the magnetic steel strips along the axial direction.

[0004] In the above technical solution, when the magnetic steel bar is large, a thicker carbon fiber sleeve is needed to fix the magnetic steel bar, and the carbon fiber sleeve affects the heat dissipation of the magnetic steel and the rotating shaft in the magnetic steel installation section. The inventor attempts to detect the temperature by setting a temperature sensor at the magnetic steel installation section, and the temperature sensor is fixed to the outer surface of the magnetic steel installation section by gluing.

[0005] However, the above-mentioned isolation layer formed by gluing is likely to affect the heat transfer between the magnetic steel mounting section and the temperature sensor, thereby causing deviations in the temperature monitoring of the temperature sensor and affecting the temperature monitoring of the magnetic levitation motor. Utility Model Content

[0006] The purpose of the utility model is to provide a magnetic levitation motor temperature monitoring mechanism and a magnetic levitation motor, which can achieve stable fixed connection of a temperature sensor on a magnetic steel mounting section without using glue, so that the temperature sensor can directly contact the outer surface of the magnetic steel mounting section, thereby improving the monitoring accuracy.

[0007] To solve the above problems, in a first aspect, the utility model provides a magnetic levitation motor temperature monitoring mechanism for realizing temperature monitoring of a rotating shaft in a magnetic levitation motor, comprising: a mounting block, a stop rod, a wireless signal transmitting component, a controller and an alarm device.

[0008] The mounting block extends along the axial direction of the rotating shaft of the magnetic levitation motor, and has a coaxial inner arc surface and an outer arc surface. The inner arc surface is embedded with a temperature sensor through a groove, and the shape and size of the inner arc surface and the temperature sensor are set to: fit with the outer circular side surface of the rotating shaft; the outer arc surface can fit with the inner arc surface of the carbon fiber sleeve at the rotating shaft;

[0009] The stop rod is fixed to the two ends of the mounting block along the axial direction of the rotating shaft, and the stop rod is used to stop the magnetic isolation rings at both ends of the magnetic steel bar; the wireless signal transmitting component is used to receive the signal of the temperature sensor and transmit the temperature signal of the temperature sensor to the controller; the controller is used to compare the temperature signal of the temperature sensor with the preset threshold, and can send an early warning signal of overtemperature to the alarm device.

[0010] In the second aspect, the utility model provides a magnetic levitation motor, including the magnetic levitation motor temperature monitoring mechanism of the first aspect, and also including a rotating shaft, a magnetic isolation ring, a magnetic steel bar and a filling block. The rotating shaft has multiple shaft sections with different outer diameters along the axial direction, one of which is a magnetic steel installation section; the magnetic isolation ring is installed at both ends of the magnetic steel installation section, and a magnetic steel installation space is formed between the two magnetic isolation rings; the magnetic steel bars are arranged at intervals along the circumference of the rotating shaft, and gap spaces are formed between adjacent magnetic steel bars; the number of filling blocks is one less than the number of gap spaces; the filling blocks and the installation blocks are respectively installed in different gap spaces; the outer diameter of the magnetic steel bar after surrounding the rotating shaft is smaller than the outer diameter of the magnetic isolation ring, and the outer sleeve of the magnetic steel bar is provided with a carbon fiber sleeve, the outer diameter of the carbon fiber sleeve is equal to the outer diameter of the magnetic isolation ring, and the two ends of the carbon fiber sleeve are respectively stopped against the magnetic isolation ring.

[0011] The beneficial effects of one or more of the above technical solutions are:

[0012] In this solution, in order to achieve a stable fixation of the temperature detection mechanism at the rotating shaft, the temperature sensor is embedded in the inner arc surface of the mounting block, the inner arc surface of the mounting block and the temperature sensor can fit with the outer circular side surface of the magnetic steel mounting section at the rotating shaft, and the outer arc surface of the mounting block fits with the inner circular side surface of the carbon fiber sleeve. The two ends of the mounting block are respectively indirectly stopped with the magnetic isolation ring through a stop rod.

[0013] That is, this solution realizes direct contact between the temperature sensor and the magnetic steel installation section without gluing through the structural arrangement of the installation block and the stop rod. When the temperature sensor is stably installed on the outer cylindrical side of the rotating shaft, this solution facilitates the detection accuracy of the temperature sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings described herein are used to provide further understanding of the present invention and constitute a part of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present application and do not constitute improper limitations on the present invention.

[0015] Figure 1 This is an axonometric diagram of a mounting block and a stop rod in an embodiment of the utility model;

[0016] Figure 2 It is an axonometric schematic diagram of the mounting block and the stop rod in another viewing direction in the embodiment of the utility model;

[0017] Figure 3A half-section view of a magnetic steel strip installed at the rotating shaft in an embodiment of the utility model;

[0018] Figure 4 for Figure 3 A schematic diagram of the structure of part A in the middle;

[0019] Figure 5 yes Figure 3 Schematic diagram of the cross section in the AA direction;

[0020] Figure 6 It is a schematic front view of the rotating shaft in the embodiment of the utility model.

[0021] Among them, 1. mounting block; 101. outer arc surface; 102. inner arc surface; 103. side surface; 104. end surface; 2. stop rod; 3. groove; 4. mounting groove; 5. rotating shaft; 501. shaft shoulder; 502. magnetic steel mounting section; 7. magnetic isolation ring; 8. carbon fiber sleeve; 9. magnetic steel strip; 10. filling block. DETAILED DESCRIPTION

[0022] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0023] 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, an electrical connection, or a communication; 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] Example 1

[0025] like Figure 1-Figure 3 As shown, this embodiment provides a magnetic levitation motor temperature monitoring mechanism for realizing temperature monitoring of a rotating shaft 5 in a magnetic levitation motor, comprising a mounting block 1, a stop rod 2, a wireless signal transmitting component, a controller and an alarm device. The mounting block 1 in this embodiment is made of elastic material, which can be rubber or silicone.

[0026] The mounting block 1 extends axially along the rotating shaft 5 of the magnetic levitation motor. The mounting block 1 has a coaxial inner arc surface 102 and an outer arc surface 101. The inner arc surface 102 is embedded with a temperature sensor through a groove. The shapes and sizes of the inner arc surface 102 and the temperature sensor are set to: be able to fit with the outer circular side surface of the rotating shaft 5; the outer arc surface 101 can fit with the inner arc surface 102 of the carbon fiber sleeve 8 at the rotating shaft 5.

[0027] There are two stop rods, and the two stop rods 2 are respectively fixed to the end faces 104 at both ends of the mounting block 1 along the axial direction of the rotating shaft 5. The stop rods are used to stop the magnetic isolation rings 7 at both ends of the magnetic steel bar 9; the wireless signal transmitting component is used to receive the signal of the temperature sensor and transmit the temperature signal of the temperature sensor to the controller; the controller is used to compare the temperature signal of the temperature sensor with the preset threshold value, and can send an early warning signal of over-temperature to the alarm device.

[0028] Specifically, in this embodiment, the cross-sectional area of ​​the stop rod is much smaller than the cross-sectional area of ​​the mounting block. This arrangement facilitates reducing the size of the combined structure of the stop rod and the mounting block, achieving a lightweight design, and making it convenient to set the mounting groove of the wireless signal transmitter on the end face of the mounting block.

[0029] Specifically, the inner arc surface of the mounting block has a groove 3, and the groove 3 is used for the above-mentioned temperature sensor. A mounting groove 4 is set on at least one end surface 104 of the mounting block 1, and the mounting groove 4 is used to install the wireless signal transmission component and the battery, and the battery is used to supply power to the wireless signal transmission component.

[0030] In this embodiment, the length of the mounting block 1 along the circumference of the rotating shaft 5 is set such that the two side surfaces 103 of the mounting block 1 along the circumference of the rotating shaft 5 can respectively abut against the adjacent magnetic steel strips 9 .

[0031] In this embodiment, the cross section of the stop rod 2 is circular. In other embodiments, the cross section of the stop rod 2 can be square, triangle or other shapes.

[0032] In this embodiment, the temperature sensor is a thermistor sensor. In some other embodiments, the temperature sensor may be a thermocouple temperature sensor.

[0033] In this embodiment, the wireless signal transmitting component is a Bluetooth signal transmitter, and the Bluetooth signal transmitter is embedded in the installation block 1. In other embodiments, other wireless signal transmitting components such as Wi-Fi can also be used if the installation size requirements are met.

[0034] In this embodiment, a battery is also installed in the mounting block 1. The battery here can be a button battery or other micro batteries.

[0035] In this embodiment, a detection circuit is provided in the mounting block 1, and the detection circuit is electrically connected to both ends of the thermistor. It is known that attaching a temperature sensor to a surface to be detected and then connecting the temperature sensor to the detection circuit to complete the temperature detection is a prior art and will not be described in detail here.

[0036] In this embodiment, the stop rod 2 and the mounting block 1 are integrally formed.

[0037] Example 2

[0038] This embodiment provides a magnetic levitation motor, including the magnetic levitation motor temperature monitoring mechanism of the first aspect, such as Figure 4-Figure 6 , further comprising a rotating shaft 5, a magnetic isolation ring 7, a magnetic steel strip 9 and a filling block 10. The rotating shaft 5 has a plurality of shaft sections with different outer diameters along the axial direction, one of which is a magnetic steel installation section 502; the magnetic isolation ring 7 is installed at both ends of the magnetic steel installation section 502, and a magnetic steel installation space is formed between the two magnetic isolation rings 7; the magnetic steel strips 9 are arranged at intervals along the circumference of the rotating shaft 5, and a gap space is formed between adjacent magnetic steel strips 9; the number of filling blocks 10 is one less than the number of gap spaces; the filling block 10 and the installation block 1 are respectively installed in different gap spaces; the outer diameter of the magnetic steel strip 9 after surrounding the rotating shaft 5 is smaller than the outer diameter of the magnetic isolation ring 7, and the outer sleeve of the magnetic steel strip 9 is provided with a carbon fiber sleeve 8, the outer diameter of the carbon fiber sleeve 8 is equal to the outer diameter of the magnetic isolation ring 7, and the two ends of the carbon fiber sleeve 8 are respectively stopped against the magnetic isolation ring 7.

[0039] The above are only embodiments of the present invention and are 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 scope of the claims of the present invention.

Claims

1. A magnetic levitation motor temperature monitoring mechanism, used to monitor the temperature of a rotating shaft in a magnetic levitation motor, characterized in that: include: An elastic mounting block extends along the axial direction of the rotating shaft of the magnetic levitation motor, the mounting block has a coaxial inner arc surface and an outer arc surface, the inner arc surface is embedded with a temperature sensor through a groove, and the shape and size of the inner arc surface and the temperature sensor are set to: be able to fit with the outer circular side surface of the rotating shaft; the outer arc surface can fit with the inner arc surface of the carbon fiber sleeve at the rotating shaft; A stop rod, the stop rod is fixed to both ends of the mounting block along the axial direction of the rotating shaft, and the stop rod is used to stop the magnetic isolation rings at both ends of the magnetic steel strip; A wireless signal transmitting component, which is used to receive a signal from a temperature sensor and transmit the temperature signal from the temperature sensor to a controller; The controller is used to compare the temperature signal of the temperature sensor with a preset threshold value and can send an early warning signal of excessive temperature to the alarm device.

2. The magnetic levitation motor temperature monitoring mechanism according to claim 1, characterized in that: The length of the mounting block along the circumferential direction of the rotating shaft is set such that two ends of the mounting block along the circumferential direction of the rotating shaft can abut against adjacent magnetic steel bars.

3. The magnetic levitation motor temperature monitoring mechanism according to claim 2, characterized in that: The cross section of the stop rod is circular.

4. The magnetic levitation motor temperature monitoring mechanism according to claim 2, characterized in that: The temperature sensor is a thermistor sensor.

5. The magnetic levitation motor temperature monitoring mechanism according to claim 1, characterized in that: The wireless signal transmitting component is a Bluetooth signal transmitter, and the Bluetooth signal transmitter is embedded in the mounting block.

6. The magnetic levitation motor temperature monitoring mechanism according to claim 1, characterized in that: A battery is also installed in the installation block.

7. The magnetic levitation motor temperature monitoring mechanism according to claim 6, characterized in that: The mounting block is provided with a detection circuit, and the detection circuit is electrically connected to two ends of the thermistor.

8. The magnetic levitation motor temperature monitoring mechanism according to claim 1, characterized in that: The stop rod and the mounting block are integrally formed.

9. A magnetic levitation motor, comprising the magnetic levitation motor temperature monitoring mechanism according to any one of claims 1 to 8, characterized in that: Also includes: A rotating shaft, which has a plurality of shaft sections with different outer diameters along the axial direction, one of which is a magnetic steel mounting section; Magnetic isolation rings are installed at both ends of the magnetic steel installation section, and a magnetic steel installation space is formed between the two magnetic isolation rings; Magnetic steel bars are arranged at intervals along the circumference of the rotating shaft, and gap spaces are formed between adjacent magnetic steel bars; The number of the filling blocks is one less than the number of the gap spaces; the filling blocks and the mounting blocks are respectively mounted in different gap spaces; The outer diameter of the magnetic steel bar after wrapping around the rotating shaft is smaller than the outer diameter of the magnetic isolation ring. The outer sleeve of the magnetic steel bar is provided with a carbon fiber sleeve, the outer diameter of the carbon fiber sleeve is equal to the outer diameter of the magnetic isolation ring, and the two ends of the carbon fiber sleeve are respectively stopped against the magnetic isolation ring.

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