High-speed permanent magnet synchronous motor for rail grinding car

Abstract

The utility model belongs to motor field, concretely relates to a high -speed permanent magnet synchronous motor for rail grinder, including frame and the rotor and stator in frame, rotor is connected with the rotating shaft and rotates synchronously, the front end cover and rear end cover are respectively connected with the both ends of frame, and the rotation support of setting up front bearing between front end cover and rotating shaft, the inside connection of front end cover front inner cover, the outside surface of front end cover forms labyrinth seal surface, and the labyrinth seal surface and labyrinth ring cooperate and form labyrinth seal, set up the rotation support of rear bearing between rear end cover and rotating shaft, and the inner surface connection of rear end cover rear inner cover, the high -speed permanent magnet synchronous motor of the utility model adopts the labyrinth ring and front end cover sealing in the front end part, and the rear end cover of rear end part is closed type structure, guarantees the internal sealing of motor, makes motor reach dust -tight effect.

Description

Technical Field

[0001] This utility model belongs to the field of electric motors, specifically relating to a high-speed permanent magnet synchronous motor for rail grinding vehicles. Background Technology

[0002] The electric motor of the rail grinding vehicle is mainly used for grinding railway rails. Its operating conditions are in an environment with a lot of grinding debris and dust, such as iron filings. The sealing and protection level of the whole machine is required to be high. The existing motor structure is difficult to meet the sealing requirements. Grinding debris and dust can easily enter the machine body, which can cause the motor to fail to start normally and affect the service life of the motor. Summary of the Invention

[0003] In view of the defects of the existing technology, the purpose of this utility model is to provide a high-speed permanent magnet synchronous motor for rail grinding vehicles, which can meet the high sealing requirements of the motor under rail grinding conditions.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a high-speed permanent magnet synchronous motor for rail grinding vehicles, comprising a frame and a rotor and stator within the frame, the rotor being connected to a rotating shaft and rotating synchronously; a front end cover and a rear end cover are respectively connected to the front and rear ends of the frame, a front bearing is provided between the front end cover and the rotating shaft for rotational support, the inner side of the front end cover is connected to a front inner cover, and the outer side of the front end cover forms a labyrinth sealing surface, the labyrinth sealing surface cooperating with a labyrinth ring to form a labyrinth seal; a rear bearing is provided between the rear end cover and the rotating shaft for rotational support, and the inner surface of the rear end cover is connected to the rear inner cover.

[0005] Furthermore, the front cover has a flange structure formed outwards, and the inner diameter surface of the flange structure mates with the shaft extension end of the rotating shaft. The flange structure and the front inner cover form an assembly space for the front bearing. One end of the inner ring of the front bearing is limited by the rotating shaft shoulder, and the other end of the inner ring of the front bearing is limited by the front bearing lock nut. One end of the outer ring of the front bearing is limited by the front inner cover, and the other end of the outer ring of the front bearing is limited by the stepped surface of the flange structure of the front cover. The labyrinth sealing surface is formed on the outer side of the flange structure.

[0006] Furthermore, the labyrinth sealing surface is formed by a plurality of annular inner grooves, the plurality of annular inner grooves being concentric but having different diameters; the labyrinth ring is fitted onto the rotating shaft, and the labyrinth ring has a plurality of side rings that match the annular inner grooves, the side rings of the labyrinth ring being assembled into the corresponding annular inner grooves to form a labyrinth seal.

[0007] Furthermore, the labyrinth sealing surface is a double labyrinth sealing surface formed by two annular inner grooves, the two annular inner grooves being concentric but having different diameters; the labyrinth ring is fitted onto the rotating shaft, the labyrinth ring has two side rings that match the annular inner grooves, the cross-section of the labyrinth ring forms an "F" shaped structure, and the side rings of the labyrinth ring are assembled into the corresponding annular inner grooves to form a labyrinth seal.

[0008] Furthermore, the front bearing is a self-aligning roller bearing.

[0009] Furthermore, an annular inner edge is formed on the inner side of the rear end cover, the rear bearing is assembled inside the annular inner edge, and the rear inner cover is connected to the annular inner edge by bolts.

[0010] Furthermore, the front cover is positioned and assembled with the machine base through an inner stop and is fastened by bolts, and a sealing strip is provided on the outer circumferential surface at the root of the inner stop of the front cover; the rear cover is positioned and assembled with the machine base through an inner stop and is fastened by bolts, and a sealing strip is provided on the outer circumferential surface at the root of the inner stop of the rear cover.

[0011] Furthermore, the rotating shaft is equipped with two copper end plates, which are located at both ends of the rotor. One end of the rotor is positioned on the rotating shaft stop, and the other end of the rotor is fastened by a rotor locking nut and a locking washer.

[0012] Furthermore, the rotor core is made of self-adhesive silicon steel sheets with a thickness of 0.2mm.

[0013] Furthermore, the base is provided with a junction box for wiring and two lifting rings for hoisting, located on opposite sides of the base.

[0014] The beneficial effects of this utility model are as follows: The high-speed permanent magnet synchronous motor of this utility model adopts a labyrinth ring and front cover for sealing at the front end, and the rear cover at the rear end is a closed structure to ensure the internal sealing of the motor and achieve a dust-tight effect. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the high-speed permanent magnet synchronous motor of this utility model; Figure 2 This is a side view of a high-speed permanent magnet synchronous motor. In the diagram: 1. Frame, 2. Rotor, 3. Stator, 4. Shaft, 5. Front cover, 501. Flange structure, 6. Rear cover, 601. Annular inner edge, 7. Front bearing, 8. Front inner cover, 9. Labyrinth ring, 10. Front bearing lock nut, 11. Rear bearing, 12. Rear inner cover, 13. Sealing strip, 14. Copper end plate, 15. Rotor lock nut, 16. Junction box, 17. Lifting ring. Detailed Implementation

[0016] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0017] See appendix Figure 1 A high-speed permanent magnet synchronous motor for rail grinding vehicles includes a base 1 and a rotor 2 and a stator 3 within the base 1. The rotor 2 is connected to a rotating shaft 4 and rotates synchronously. A front cover 5 and a rear cover 6 are respectively connected to the front and rear ends of the base 1. A front bearing 7 is provided between the front cover 5 and the rotating shaft 4 for rotational support. The inner side of the front cover 5 is connected to a front inner cover 8, and the outer side of the front cover 8 forms a labyrinth sealing surface. The labyrinth sealing surface cooperates with a labyrinth ring 9 to form a labyrinth seal. A rear bearing 11 is provided between the rear cover 6 and the rotating shaft 4 for rotational support. The inner surface of the rear cover 6 is connected to a rear inner cover 12.

[0018] Furthermore, the front cover 5 has a flange structure 501 formed outwards. The inner diameter surface of the flange structure 501 mates with the shaft extension end of the rotating shaft 4. The flange structure 501 and the front inner cover form an assembly space for the front bearing 7. One end of the inner ring of the front bearing is limited by the rotating shaft shoulder, and the other end is limited by the front bearing locking nut 10. One end of the outer ring of the front bearing is limited by the front inner cover 8, and the other end is limited by the stepped surface of the flange structure of the front cover. The labyrinth sealing surface is formed on the outer side of the flange structure. The labyrinth sealing surface is a double labyrinth sealing surface formed by two annular inner grooves. The two annular inner grooves are concentric but have different diameters. The labyrinth ring is fitted onto the rotating shaft. The labyrinth ring has two side rings that match the annular inner grooves. The cross-section of the labyrinth ring forms an "F" shape. The side rings of the labyrinth ring 9 are assembled into the corresponding annular inner grooves to form a labyrinth seal. The front bearing 7 is a self-aligning roller bearing.

[0019] Furthermore, the rear end cover 6 is a closed structure, and an annular inner edge 601 is formed on the inner side of the rear end cover 6. The rear bearing 11 is assembled in the annular inner edge 601, and the rear inner cover 12 is connected to the annular inner edge 601 by bolts.

[0020] Based on the above technical solution, the front end of the motor is the shaft extension end, and the front end of the rotating shaft 4 passes through the front end cover 5. Therefore, a labyrinth ring 9 is used to seal the junction of the rotating shaft 4 and the front end cover 5. The rear end of the rotating shaft 4 is located inside the base, so the rear end cover 6 is a closed structure as a whole, and an annular inner edge 601 is provided for installing the rear bearing 11 and the end of the rotating shaft 4.

[0021] Furthermore, in order to seal the inner cavity of the base 1, the front cover 5 is positioned and assembled with the base 1 through the inner stop and is fastened by bolts, and a sealing strip 13 is provided on the outer peripheral surface of the root of the inner stop of the front cover; the rear cover 6 is positioned and assembled with the base 1 through the inner stop and is fastened by bolts, and a sealing strip 13 is provided on the outer peripheral surface of the root of the inner stop of the rear cover 6.

[0022] Furthermore, two copper end plates 14 are mounted on the rotating shaft 4. The two copper end plates 14 are located at both ends of the rotor 2. One end of the rotor 2 is positioned on the rotating shaft stop, and the other end of the rotor 2 is fastened by the rotor locking nut 15 and the stop washer.

[0023] Based on the above technical solution, the two copper end plates 14 and the rotor 2 are sequentially positioned along the stepped surface of the shaft 4, and are secured at the ends by rotor locking nuts 15 and locking washers. This ensures that the two copper end plates 14 and the rotor 2 do not move along the shaft 4, reducing vibration during motor operation.

[0024] Furthermore, the rotor core is made of self-adhesive silicon steel sheets with a thickness of 0.2mm.

[0025] Furthermore, the base 1 is provided with a junction box 16 for wiring and lifting rings 17 for hoisting. There are two lifting rings 17, located on both sides of the base 1 respectively.

[0026] This motor is installed on a railway grinding vehicle to remove rust from the surface of railway rails. The motor has an IP65 protection rating, operates continuously at a rated speed of 6000 r / min, and can withstand an axial thrust of 3000 N·m. The front and rear end covers and the base are made of steel, with high-temperature sealing strips between the end covers and the base. The shaft extension end uses a labyrinth ring structure to ensure the motor remains dust-tight.

[0027] Bearings: Both ends are equipped with high-temperature, high-speed bearings. The shaft extension end uses a self-aligning roller bearing, which is secured with a lock nut and a locking washer, and can withstand a large axial load.

[0028] The shaft is made of 42CrMo forged shaft and has been quenched and tempered, giving it high strength and good toughness, thus effectively resisting impact loads and preventing breakage.

[0029] The stator and rotor cores are made of 0.2mm thick non-oriented, ultra-low loss and ultra-high magnetic induction intensity self-adhesive silicon steel sheets (B20AV1300), which can effectively reduce core loss and eddy current loss and improve motor efficiency.

[0030] The rotor magnets are made of 42UH neodymium iron boron, which has high remanence and coercivity. It has strong magnetic induction intensity and anti-demagnetization ability, and is resistant to high temperature, which allows the motor to operate reliably in high temperature environments.

[0031] The rotor core has copper end plates at both ends. The rotor is dynamically balanced using a weight-reduction method, with a balance accuracy of G1. One end of the core is positioned on the shaft stop, and the other end is secured with a lock nut and a locking washer. This effectively reduces vibration and noise at high speeds, improves operating efficiency, and extends the motor's service life.

[0032] It should be noted that the parts of this utility model not described in detail are existing technologies.

[0033] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0035] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0037] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0038] The above examples are merely preferred embodiments of this utility model. Obviously, this utility model is not limited to the above embodiments and many variations are possible. All variations that can be directly derived or conceived by those skilled in the art from the disclosure of this utility model should be considered within the protection scope of this utility model.

Claims

1. A high-speed permanent magnet synchronous motor for a rail grinding vehicle, characterized in that: The device includes a base and a rotor and stator within the base. The rotor is connected to a rotating shaft and rotates synchronously. The front and rear ends of the base are respectively connected to a front cover and a rear cover. A front bearing is provided between the front cover and the rotating shaft for rotational support. The inner side of the front cover is connected to a front inner cover, and the outer side of the front cover forms a labyrinth sealing surface. The labyrinth sealing surface cooperates with a labyrinth ring to form a labyrinth seal. A rear bearing is provided between the rear cover and the rotating shaft for rotational support, and the inner surface of the rear cover is connected to the rear inner cover.

2. The high-speed permanent magnet synchronous motor for a rail grinding vehicle according to claim 1, characterized in that: The front cover has a flange structure formed outwards. The inner diameter surface of the flange structure mates with the shaft extension end of the rotating shaft. The flange structure and the front inner cover form an assembly space for the front bearing. One end of the inner ring of the front bearing is limited by the rotating shaft shoulder, and the other end of the inner ring of the front bearing is limited by the front bearing lock nut. One end of the outer ring of the front bearing is limited by the front inner cover, and the other end of the outer ring of the front bearing is limited by the stepped surface of the flange structure of the front cover. The labyrinth sealing surface is formed on the outer side of the flange structure.

3. A high-speed permanent magnet synchronous motor for a rail grinding vehicle according to claim 1 or 2, characterized in that: The labyrinth sealing surface is formed by several annular inner grooves, which are concentric but have different diameters. The labyrinth ring is fitted onto the rotating shaft and has several side rings that match the annular inner grooves. The side rings of the labyrinth ring are assembled into the corresponding annular inner grooves to form a labyrinth seal.

4. A high-speed permanent magnet synchronous motor for a rail grinding vehicle according to claim 1 or 2, characterized in that: The labyrinth sealing surface is a double labyrinth sealing surface formed by two annular inner grooves, the two annular inner grooves being concentric but having different diameters; the labyrinth ring is fitted onto the rotating shaft, and the labyrinth ring has two side rings that match the annular inner grooves. The cross-section of the labyrinth ring forms an "F" shape structure, and the side rings of the labyrinth ring are assembled into the corresponding annular inner grooves to form a labyrinth seal.

5. A high-speed permanent magnet synchronous motor for a rail grinding vehicle according to claim 1 or 2, characterized in that: The front bearing is a self-aligning roller bearing.

6. A high-speed permanent magnet synchronous motor for a rail grinding vehicle according to claim 1, characterized in that: The rear end cover has an annular inner edge, the rear bearing is assembled inside the annular inner edge, and the rear inner cover is connected to the annular inner edge by bolts.

7. A high-speed permanent magnet synchronous motor for a rail grinding vehicle according to claim 1, characterized in that: The front cover is positioned and assembled with the machine base through an inner stop and is fastened by bolts. A sealing strip is provided on the outer circumferential surface at the root of the inner stop of the front cover. The rear cover is positioned and assembled with the machine base through an inner stop and is fastened by bolts. A sealing strip is provided on the outer circumferential surface at the root of the inner stop of the rear cover.

8. A high-speed permanent magnet synchronous motor for a rail grinding vehicle according to claim 1, characterized in that: Two copper end plates are mounted on the rotating shaft. The two copper end plates are located at both ends of the rotor. One end of the rotor is positioned on the rotating shaft stop, and the other end of the rotor is fastened by the rotor locking nut and the locking washer.

9. A high-speed permanent magnet synchronous motor for a rail grinding vehicle according to claim 1, characterized in that: The rotor core is made of self-adhesive silicon steel sheets with a thickness of 0.2mm.

10. A high-speed permanent magnet synchronous motor for a rail grinding vehicle according to claim 1, characterized in that: The base is equipped with a junction box for wiring and two lifting rings for hoisting. The lifting rings are located on both sides of the base.

Images