Motor for improving axial support and wet mill

Abstract

The utility model relates to a motor capable of improving axial support and a wet mill, which comprise a casing, a stator fixed on the casing, a rotor which is rotatably accommodated at the inner side of the stator and is provided with a rotating shaft, and a first end cover and a second end cover which are arranged at the two axial sides of the casing, and are respectively provided with a first cavity and a second cavity, the device is characterized in that a first self-aligning roller bearing for supporting the rotating shaft is arranged in the first cavity, and a thrust bearing for supporting the rotating shaft, a spacer bush and a second self-aligning roller bearing are sequentially arranged in the second cavity from bottom to top along the axis. According to the motor capable of improving the axial bearing, the supporting structures on the two axial sides of the motor are improved, so that the motor can conveniently transmit the borne axial load to the second end cover, meanwhile, the rotating shaft of the motor can be self-adaptively aligned through the self-aligning roller bearings on the two axial sides, the radial run-out of the rotating shaft during rotation is reduced, and the service life of the motor is prolonged. And the axial load capacity of the motor is improved while the smooth rotation of the motor is ensured.

Description

Technical Field

[0001] This utility model relates to a motor and a wet grinding machine for improving axial support, and its IPC classification number is H02K 5 / 173 (2006.01). Background Technology

[0002] Existing motor bearing structures primarily bear the weight of the rotor, with limited capacity to withstand external loads, especially axial loads. (See...) Figure 1 In existing applications (such as wet grinding mills), the existing motor 20' requires a drive pulley 60', a belt 80', and a driven pulley 70' to drive the transmission shaft 50' mounted on the bracket 10'. The power is then transmitted to the stirring shaft 40' extending axially from the material cylinder 30'. When the existing motor is used in the complete machine, it requires the cooperation of multiple parts to transmit power to the workpiece. This results in low power transmission efficiency and requires a large assembly space, thus necessitating improvement.

[0003] For relevant terminology and common knowledge, please refer to the "Mechanical Engineering Handbook" and "Electrical Engineering Handbook" published by China Machine Press, as well as the national standards "GB / T288-2013 Rolling Bearings - Dimensions of Self-Aligning Roller Bearings" and "GB / T 273.2-2018 Rolling Bearings - General Scheme for Dimensions - Part 2: Thrust Bearings". Utility Model Content

[0004] To solve the above problems, this utility model provides the following technical solution:

[0005] An improved axial support motor includes a housing, a stator fixed to the housing, a rotor with a rotating shaft rotatably housed inside the stator, and a first end cover and a second end cover disposed on both axial sides of the housing. The first end cover and the second end cover are respectively provided with a first chamber and a second chamber. The first chamber is provided with a first self-aligning roller bearing for supporting the rotating shaft, and the second chamber is provided with a thrust bearing, a spacer, and a second self-aligning roller bearing for supporting the rotating shaft in sequence from bottom to top along the axis.

[0006] This invention relates to an improved axial support motor. By modifying the support structure on both sides of the motor's axial direction, the axial load borne by the motor can be easily transferred to the second end cover. At the same time, the motor shaft can self-align itself through self-aligning roller bearings on both sides of the axial direction, reducing radial runout during shaft rotation. This ensures smooth motor rotation while improving the motor's axial load capacity.

[0007] Furthermore, the housing is a hollow cylindrical body open at both ends in the axial direction. The first end cover is fixed to one end of the housing in the axial direction and includes a cylindrical first mounting part and a plate-shaped first connecting part extending radially outward from the first mounting part. The second end cover is fixed to the other end of the housing in the axial direction and includes a cylindrical second mounting part and a plate-shaped second connecting part extending radially outward from the second mounting part.

[0008] Furthermore, the second chamber is provided with a second groove axially facing the end face of the thrust bearing, and an elastic gasket is provided in the second groove for the axial end face of the thrust bearing to abut against.

[0009] Furthermore, the second mounting part is a cylindrical body, with a third ring-shaped cover plate on the axial side near the thrust bearing and a fourth ring-shaped cover plate on the other side. A first sealing ring is provided between the third cover plate and the radial direction of the rotating shaft.

[0010] Furthermore, the radial wall surface of the fourth cover plate that contacts the second mounting part is provided with more than two independent annular cover plate grooves.

[0011] Furthermore, the radial outer surface of the first mounting part is provided with a first liquid inlet hole communicating with the first chamber and / or the radial outer surface of the second mounting part is provided with a second liquid inlet hole communicating with the second chamber.

[0012] Furthermore, the radial wall surface of the second chamber that contacts the second self-aligning roller bearing is recessed to form two or more independent annular second radial grooves, and a second elastic sealing ring is provided on the second radial groove.

[0013] Furthermore, the radial wall surface of the first chamber that contacts the first self-aligning roller bearing is recessed to form two or more independent annular first radial grooves, and a first elastic sealing ring is provided on the first radial groove.

[0014] A wet grinding mill includes a base, a barrel fixed to the base, an agitator disposed in the inner cavity of the barrel, a motor and a coupling for improving axial support according to any one of the above, wherein the agitator includes an agitator shaft extending outward from one axial end of the inner cavity of the barrel, and the coupling couples the motor shaft to the agitator shaft, characterized in that: the motor is erected directly above or below the barrel.

[0015] Furthermore, the motor shaft and the agitator shaft are arranged coaxially.

[0016] The wet grinding mill of this utility model has a smaller overall assembly part and a smaller radial footprint by setting the optimized motor upright directly above or below the material cylinder, which facilitates the assembly of the wet grinding mill and the layout of the production line. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of an existing wet grinding mill;

[0018] Figure 2 This is a three-dimensional structural diagram of the motor of this utility model;

[0019] Figure 3 This is an axial sectional view of the motor of this utility model;

[0020] Figure 4 yes Figure 3 A magnified view of part A in the diagram;

[0021] Figure 5 yes Figure 3 A magnified view of part B in the diagram;

[0022] Figure 6 This is a schematic diagram of the structure of the wet grinding mill of this utility model;

[0023] Wherein: 10´-support frame, 20´-motor, 30´-material cylinder, 40´-stirring shaft, 50´-transmission shaft, 60´-drive wheel, 70´-driven wheel, 80´-belt

[0024] 1-First chamber, 2-Second chamber, 10-Base, 20-Barrel, 30-Agitator shaft, 31-Agitator, 40-Motor, 100-House, 200-Stator, 300-Rotor, 400-First end cover, 410-First mounting part, 411-First liquid inlet, 412-First radial groove, 420-First connecting part, 430-First cover plate, 440-Second cover plate, 500-Second end cover, 510-Second mounting part Part, 511-Second groove, 512-Second inlet hole, 513-Second radial groove, 520-Second connecting part, 530-Third cover plate, 540-Fourth cover plate, 541-Cover plate groove, 610-First self-aligning roller bearing, 620-Thrust bearing, 630-Spacer, 640-Second self-aligning roller bearing, 710-Elastic gasket, 720-First sealing ring, 730-Second elastic sealing ring, 740-First elastic sealing ring Detailed Implementation

[0025] This utility model discloses a motor with improved axial support, see [link to utility model]. Figure 2 and Figure 3The motor 40 includes a housing 100, a stator 200 fixed to the housing 100, a rotor 300 rotatably housed radially inside the stator 200, a first end cover 400 disposed on one axial side of the housing 100, a second end cover 500 disposed on the other axial side of the housing 100, a first self-aligning roller bearing 610, a second self-aligning roller bearing 640, a thrust bearing 620, and a spacer 630. The rotor 300 includes a shaft 310, and the first end cover 400 is provided with a shaft 310 for the rotor 300. The first chamber 1 through which the rotor 300 passes is equipped with a first self-aligning roller bearing 610, whose inner ring is for the rotor shaft 310 to be inserted and installed. The second end cover 500 is provided with a second chamber 2 for the rotor shaft 310 of the rotor 300 to pass through. When the motor 40 is upright (i.e. the axis of the motor is perpendicular or nearly perpendicular to the horizontal plane), the thrust bearing 620, the spacer 630 and the second self-aligning roller bearing 640 are installed in the second chamber 2 from bottom to top along the axis of the housing 100, and are respectively for the rotor shaft 310 to pass through and install.

[0026] This invention relates to an improved axial support motor. By modifying the support structure on both sides of the motor's axial direction, the axial load borne by the motor can be easily transferred to the second end cover. At the same time, the motor shaft can self-align itself through self-aligning roller bearings on both sides of the axial direction, reducing radial runout during shaft rotation. This ensures smooth motor rotation while improving the motor's axial load capacity.

[0027] See Figure 3 The housing 100 of the motor 40 of this utility model is a hollow cylindrical body with open ends along the axial direction. This design of the motor housing has a simple structure and is easy to manufacture. Preferably, to facilitate the manufacturing of the first end cover 400, the first end cover 400 can be fixedly mounted to one axial end of the housing 100 by bolts or welding. It includes a cylindrical first mounting portion 410 with open ends, a plate-shaped first connecting portion 420 protruding radially outward from the outer periphery of the first mounting portion 410, a ring-shaped first cover plate 430 covering one axial side of the first mounting portion 410, and a ring-shaped second cover plate 440 covering the other axial side of the first mounting portion 410. The first mounting portion 410, the first cover plate 430, and the second cover plate 440 form a first chamber 1. In this embodiment, the first mounting portion 410 and the first connecting portion 420 are fixedly connected by welding, and the first cover plate 430 and the second cover plate 440 are fixedly connected to the first mounting portion 410 by welding or screws. In other embodiments, the first mounting portion 410, the first connecting portion 420, and the first cover plate 430 can also be forged or die-cast into a single integral part, with the second cover plate 440 detachably mounted on the first mounting portion 410. See Figure 5Furthermore, the radially outer surface of the first mounting portion 410 is provided with a first liquid inlet hole 411 communicating with the first chamber 1. The design of this first liquid inlet hole 411 allows lubricant to be added directly to the first chamber 1 without disassembling the first or second cover plate, facilitating motor maintenance. To facilitate coaxiality adjustment of the motor shaft 310 during rotation and further improve the stability of the motor 40, the wall surface of the first mounting portion 410 in radial contact with the first self-aligning roller bearing 610 is recessed to form two or more independent annular first radial grooves 412, and a first elastic sealing ring 740 is provided on the first radial groove 412.

[0028] See Figure 3 To facilitate the production and processing of the second end cover 500, preferably, the second end cover 500 is fixedly mounted on the other axial end of the housing 100 by bolts or welding. The second end cover 500 includes a cylindrical second mounting part 510 with open ends, a plate-shaped second connecting part 520 protruding radially outward from the outer periphery of the second mounting part 510, an annular third cover plate 530 covering the side of the second mounting part 510 axially close to the thrust bearing 620, and an annular fourth cover plate 540 covering the side of the second mounting part 510 axially away from the thrust bearing 620. The second mounting part 510, the third cover plate 530, and the fourth cover plate 540 form a second chamber 2. In this embodiment, the second mounting part 510 and the second connecting part 520 are fixedly connected by welding, and the third cover plate 530 and the fourth cover plate 540 are connected to the second mounting part 510 by welding or screws. In other embodiments, the second mounting portion 510, the second connecting portion 520, and the third cover plate 530 can also be integrally formed by forging or direct die casting, and the fourth cover plate 540 can be detachably mounted on the second mounting portion 510.

[0029] See Figure 4 Preferably, the inner wall of one axial end of the second mounting portion 510 protrudes radially inward to form an annular boss. This boss is axially recessed towards the end face of the thrust bearing 630 to form a second groove 511. An elastic gasket 710 is provided in the second groove 511 for the axial end face of the thrust bearing 620 to abut against. This design provides axial preload to the thrust bearing 620, the spacer 630, and the second self-aligning roller bearing 640, reducing axial runout of the shaft when the motor 40 rotates and improving the smoothness of motor rotation. Of course, as another embodiment, providing a groove on the axial end face of the third cover plate 530 to install the elastic gasket 710 for the thrust bearing 620 to abut against can also achieve the above effect.

[0030] See Figure 4Preferably, the wall surface of the second mounting portion 510 that radially contacts the second self-aligning roller bearing 640 is recessed to form two or more independent annular second radial grooves 513, and a second elastic sealing ring 730 is provided on the second radial groove 513. This design facilitates the adjustment of the coaxiality of the motor 40's shaft 310 during rotation, further improving the stability of the motor 40's operation. Furthermore, the radially outer surface of the second mounting portion 510 is provided with a second liquid inlet hole 512 communicating with the second chamber 2. This second liquid inlet hole 512 allows for the direct addition of lubricant to the second chamber 2 without removing the cover plate, facilitating maintenance.

[0031] See Figure 4 In this invention, a first sealing ring 720 is provided between the third cover plate 530 of the motor 40 and the radial direction of the rotating shaft 310. This design reduces the risk of lubricating oil leakage in the second chamber 2. Preferably, to reduce the entry of wear dust from inside the motor 40 into the second chamber 2 and improve the service life of the lubricant in the second chamber, the fourth cover plate 540 has two or more independent annular cover plate grooves 541 on the radial wall surface that contacts the second mounting part 510.

[0032] See Figure 6 This utility model also discloses a wet grinding mill, including a base 10, a material cylinder 20 fixedly installed on the base, an agitator 31 housed within the inner cavity of the material cylinder 20, a motor 40 with improved axial support as described above, and a coupling 50. The agitator 31 includes an agitator shaft 30 extending axially outward from the inner cavity of the material cylinder 20. The motor 40 is located directly above the material cylinder 20 and is uprightly installed on the base 10. One axial end of the coupling 50 is connected to a rotating shaft 310, and the other axial end is connected to the agitator shaft 30. After the above assembly, the wet grinding mill requires fewer assembly parts and has a smaller radial footprint, facilitating assembly and production line layout. Preferably, to further reduce the radial footprint of the wet grinding mill, the motor shaft and the agitator shaft are coaxially arranged. Of course, as another embodiment, the motor can also be uprightly positioned directly below the material cylinder.

[0033] This utility model is not limited to the above-described embodiments. If any modifications or variations to this utility model do not depart from the spirit and scope of this utility model, and if such modifications and variations fall within the scope of the claims and equivalent technologies of this utility model, then this utility model also intends to include such modifications and variations.

Claims

1. A motor with improved axial support, comprising a housing (100), a stator (200) fixed to the housing, a rotor (300) having a shaft (310) rotatably housed inside the stator (200), and a first end cover (400) and a second end cover (500) disposed on both axial sides of the housing (100), wherein the first end cover (400) and the second end cover (500) are respectively provided with a first chamber (1) and a second chamber (2), characterized in that: The first chamber (1) is provided with a first self-aligning roller bearing (610) supported by a rotating shaft (310), and the second chamber (2) is provided with a thrust bearing (620), a spacer (630) and a second self-aligning roller bearing (640) supported by a rotating shaft (310) in sequence from bottom to top along the axis.

2. The motor with improved axial support according to claim 1, characterized in that: The housing (100) is a hollow columnar body with open ends in the axial direction. The first end cap (400) is fixed to one end of the housing (100) in the axial direction and includes a cylindrical first mounting part (410) and a plate-shaped first connecting part (420) extending radially outward from the first mounting part (410). The second end cap (500) is fixed to the other end of the housing (100) in the axial direction and includes a cylindrical second mounting part (510) and a plate-shaped second connecting part (520) extending radially outward from the second mounting part (510).

3. The motor with improved axial support according to claim 1 or 2, characterized in that: The second chamber (2) is provided with a second groove (511) axially facing the end face of the thrust bearing (620), and an elastic gasket (710) is provided in the second groove (511) for the axial end face of the thrust bearing (620) to abut.

4. The motor with improved axial support according to claim 2, characterized in that: The second mounting part (510) is a cylindrical body, with a third cover plate (530) in the shape of an annular column on one axial side near the thrust bearing (620) and a fourth cover plate (540) in the shape of an annular column on the other side. A first sealing ring (720) is provided between the third cover plate (530) and the rotating shaft (310) in the radial direction.

5. The motor with improved axial support according to claim 4, characterized in that: The fourth cover plate (540) has two or more independent annular cover plate grooves (541) on the radial wall surface that contacts the second mounting part (510).

6. The motor with improved axial support according to claim 2, characterized in that: The first mounting part (410) has a first liquid inlet hole (411) communicating with the first chamber (1) on its radial outer surface and / or the second mounting part (510) has a second liquid inlet hole (512) communicating with the second chamber (2) on its radial outer surface.

7. The motor with improved axial support according to claim 1, characterized in that: The radial wall of the second chamber (2) that contacts the second self-aligning roller bearing (640) is recessed to form two or more independent annular second radial grooves (513), and a second elastic sealing ring (730) is provided on the second radial groove (513).

8. The motor with improved axial support according to claim 7, characterized in that: The radial wall of the first chamber (1) in contact with the first self-aligning roller bearing (610) is recessed to form two or more independent annular first radial grooves (412), and a first elastic sealing ring (740) is provided on the first radial groove (412).

9. A wet grinding mill, comprising a base (10), a barrel (20) fixed to the base, an agitator (31) disposed within the inner cavity of the barrel (20), and a coupling (50), wherein the agitator (31) comprises an agitator shaft (30) extending axially outward from one end of the inner cavity of the barrel (20), characterized in that: It also includes a motor (40) with improved axial support as described in any one of claims 1 to 8, wherein the coupling (50) couples the rotating shaft (310) of the motor (40) to the agitator shaft (30), and the motor (40) is erected directly above or below the material cylinder (20).

10. The wet mill according to claim 9, characterized in that: The motor (40) shaft (310) is coaxial with the stirrer shaft (30).

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