Lower bearing structure of vertical motor

Abstract

The utility model relates to the technical field of vertical motors, in particular to a lower bearing structure of a vertical motor. The device comprises a bearing chamber, the lower end face of the bearing chamber is detachably connected with an end cover through a plurality of bolts, a bearing is arranged in an inner cavity of the bearing chamber, and a motor shaft is sleeved with an inner ring of the bearing; an inner cover and an outer cover are respectively arranged at the upper end and the lower end of the bearing chamber, the motor shaft is sleeved with the inner cover and the outer cover, the inner cover is detachably connected to the upper end face of the bearing chamber through a plurality of bolts, and the outer cover is detachably connected to the lower end face of the bearing chamber through a plurality of bolts. According to the utility model, the end cover and the bearing chamber adopt a split structure, the bearing chamber and the bearing can be firstly installed on the rotor shaft, the end cover is installed at the bottom of the motor shell, and then the bearing chamber and the end cover are connected, so that the installation process is simplified, the working efficiency of motor installation is improved, and the abrasion of the bearing chamber and the bearing in the installation process is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of vertical motors, in particular to a lower bearing structure of a vertical motor. Background Art

[0002] Insulated bearings are more expensive than ordinary bearings. The lower bearing of a vertical motor is on the load side, so its bearing life is shorter than that of the non-load side. To optimize maintenance costs, the insulation structure of the lower bearing of a vertical motor is often welded or cast into an integral part of the end cover and bearing chamber, then designed with an insulating sleeve. Due to the insulating sleeve, the outer diameter of the bearing chamber entrance is designed to be larger than the outer diameter of the bearing. Large, purely vertical motors lack a base, so a raised platform is required for pure vertical installation. The commonly used installation structure requires the bearings to be first installed on the rotor shaft, with the bearing chamber secured to the bottom of the motor housing with the end cover. When the rotor enters the stator, the bearing and the insulating sleeve must be aligned, and then the end cover must be tightened to allow the bearing to enter the insulating sleeve. Because the bearing chamber entrance is larger than the outer diameter of the bearing and the bearing and insulating sleeve are a tight fit, installation and positioning are difficult, making it difficult for the bearing to fit into the bearing chamber. Incorrect installation can cause wear on the bearing chamber and the bearing. Utility Model Content

[0003] In response to the shortcomings of the above-mentioned existing production technology, the present application provides a lower bearing structure for a vertical motor. The end cover and the bearing chamber adopt a split structure. The bearing chamber and the bearing can be installed on the rotor shaft first, and the end cover is installed on the bottom of the motor housing. Then the bearing chamber and the end cover are connected, which simplifies the installation process, improves the efficiency of motor installation work, and reduces the wear of the bearing chamber and bearings during the installation process.

[0004] The technical solutions adopted in this utility model are as follows:

[0005] A lower bearing structure of a vertical motor includes a bearing chamber, the lower end surface of the bearing chamber is detachably connected to the end cover by multiple bolts, a bearing is arranged in the inner cavity of the bearing chamber, and the inner ring of the bearing is sleeved on the motor shaft; an inner cover and an outer cover are respectively arranged at the upper and lower ends of the bearing chamber, and both the inner cover and the outer cover are sleeved on the motor shaft, the inner cover is detachably connected to the upper end surface of the bearing chamber by multiple bolts, and the outer cover is detachably connected to the lower end surface of the bearing chamber by multiple bolts; an oil storage retaining ring is sleeved on the motor shaft, the oil storage retaining ring is located between the bearing and the outer cover, a plurality of screw holes are arranged in the oil storage retaining ring, each screw hole is connected to a set screw, the set screw can radially contact the motor shaft, an annular groove is arranged on the motor shaft, and the set screw can radially extend into the annular groove to realize the positioning and installation of the oil storage retaining ring on the motor shaft.

[0006] Furthermore, a bearing positioning shoulder is provided on the motor shaft, the upper end surface of the bearing positions and contacts the bearing positioning shoulder, the lower end surface of the bearing positions and contacts a retaining spring, and the retaining spring is clamped in the clamping groove of the motor shaft.

[0007] Furthermore, a plurality of spring installation cavities are provided on the lower end surface of the inner cover, and springs are provided in the spring installation cavities, and the springs can be pressed and contacted with the upper end surface of the bearing.

[0008] Furthermore, an oil storage groove is provided on the upper end surface of the oil storage retaining ring, an oil filling nozzle and an oil outlet are provided on the left and right sides of the outer cover respectively, an axially penetrating lubrication channel is provided in the bearing chamber, and the two ends of the lubrication channel are connected to the oil filling nozzle and the inner cavity of the inner cover respectively.

[0009] Furthermore, a plurality of oil scrapers are provided on the lower end surface of the oil storage retaining ring, and the plurality of oil scrapers are evenly distributed along the circumferential direction.

[0010] Furthermore, a plurality of annular labyrinth grooves are provided on the inner ring of the inner cover.

[0011] Furthermore, a waterproof retaining ring is installed at the lower end of the oil storage retaining ring, and the waterproof retaining ring is detachably connected to the lower end surface of the oil storage retaining ring through multiple bolts. The waterproof retaining ring is located below the outer cover, and a water-throwing trough is provided on the outer ring of the waterproof retaining ring. The water-throwing trough has a water-throwing inclined surface inclined from top to bottom and from inside to outside.

[0012] Furthermore, an insulating sleeve is provided between the bearing chamber and the bearing, an insulating plate is provided between the inner cover and the bearing, the spring can press and contact the insulating plate, there is a gap between the inner cover and the motor shaft and the inner ring of the bearing, and there is a gap between the outer cover and the oil storage retaining ring and the waterproof retaining ring.

[0013] Furthermore, an insulating sleeve positioning ring is provided on the lower end surface of the bearing chamber inner cavity, the lower end surface of the insulating sleeve is positioned and contacts the insulating sleeve positioning ring, the lower end surface of the inner cover can press and contact the insulating sleeve, and the inner cover and the insulating sleeve positioning ring can realize axial positioning of the insulating sleeve.

[0014] The beneficial effects of the utility model are as follows:

[0015] The end cover and the bearing chamber of the utility model adopt a split structure. The bearing chamber and the bearing can be installed on the rotor shaft first, and the end cover is installed on the bottom of the motor housing. Then the bearing chamber and the end cover are connected, which simplifies the installation process, improves the efficiency of motor installation, and reduces the wear of the bearing chamber and the bearing during installation. Because the end cover and the bearing chamber adopt a split structure, the end cover is not restricted by the bearing model, and the end cover of the motor with the same frame number is the same, which simplifies the end cover mold. When processing the bearing chamber, the original need for large-scale vertical milling processing along with the end cover is simplified to lathe processing alone, avoiding the work of lifting large objects and reducing the demand for production equipment. The bearing chamber of the utility model can be installed in advance, avoiding the traditional difficult installation process, avoiding installation errors and rework, and reducing the wear of the bearing and the bearing chamber. The end cover of the utility model is reduced in weight, which is convenient for workers to install and disassemble, and reduces the installation risk. The utility model adds an oil storage retaining ring, optimizes the oil storage performance and waste oil removal. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a first perspective stereogram of the present invention.

[0017] Figure 2 This is a stereoscopic diagram of the present invention from a second viewing angle.

[0018] Figure 3 It is a half-section view of the utility model.

[0019] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0020] Figure 5 This is a structural diagram of the inner cover of the present utility model.

[0021] Figure 6 This is a structural diagram of the outer cover of the present utility model.

[0022] Figure 7 This is a structural diagram of the oil storage retaining ring of the utility model from the first perspective.

[0023] Figure 8 This is a structural diagram of the oil storage retaining ring of the utility model from a second perspective.

[0024] Among them: 1. Bearing chamber; 2. End cover; 3. Inner cover; 4. Outer cover; 5. Insulation sleeve; 6. Insulation plate; 7. Bearing; 8. Motor shaft; 9. Circlip; 10. Oil storage ring; 11. Waterproof ring; 12. Set screw; 13. Oil filling nozzle; 14. Oil outlet; 15. Spring; 16. Oil storage tank; 17. Oil scraper; 18. Lubrication channel; 19. Labyrinth tank; 20. Water sluice. DETAILED DESCRIPTION

[0025] The specific implementation of the present utility model will be described below with reference to the accompanying drawings.

[0026] Since the vertical motor is arranged vertically when installed, the up and down directions described in this article refer to the directions of the components of the lower bearing structure of the vertical motor when it is installed.

[0027] like Figure 1 、 Figure 2 and Figure 3 As shown, a lower bearing structure of a vertical motor includes a bearing chamber 1. The lower end surface of the bearing chamber 1 is detachably connected to an end cover 2 via a plurality of bolts. The end cover 2 provides axial support for the entire motor.

[0028] The end cover 2 and the bearing chamber 1 adopt a split structure for disassembly and assembly. During installation, the lower bearing structure except the end cover 2 is first installed on the motor rotor shaft. When the rotor enters the stator, the bearing chamber 1 uses a slightly longer guide screw and the bearing chamber mounting hole of the end cover to guide the installation, and then bolt it to conveniently install the rotor.

[0029] like Figure 1 、 Figure 2 and Figure 3 As shown, a bearing 7 is disposed within the inner cavity of the bearing chamber 1. The inner ring of the bearing 7 is sleeved onto the motor shaft 8. A bearing locating shoulder is disposed on the motor shaft 8. The upper end face of the bearing 7 contacts the bearing locating shoulder, while the lower end face of the bearing 7 contacts a retaining spring 9. The retaining spring 9 is mounted in a slot in the motor shaft 8. The bearing locating shoulder and retaining spring 9 together secure the bearing 7 in position on the motor shaft 8.

[0030] like Figure 1 、 Figure 2 and Figure 3 As shown, the bearing chamber 1 is provided with an inner cover 3 and an outer cover 4 at the upper and lower ends, respectively. Both inner cover 3 and outer cover 4 are mounted on the motor shaft 8. The inner cover 3 is detachably connected to the upper end surface of the bearing chamber 1 by multiple bolts evenly distributed along the circumference. The outer cover 4 is detachably connected to the lower end surface of the bearing chamber 1 by multiple bolts evenly distributed along the circumference.

[0031] like Figure 3 and Figure 5 As shown, a plurality of spring installation cavities are provided on the lower end surface of the inner cover 3 , and springs 15 are provided in the spring installation cavities. The springs 15 can press and contact the upper end surface of the bearing 7 , thereby realizing axial positioning of the bearing 7 .

[0032] like Figure 3 As shown, the motor shaft 8 is provided with an oil retaining ring 10, which is located between the bearing 7 and the outer cover 4. The lower end of the oil retaining ring 10 is provided with a waterproof retaining ring 11, which is detachably connected to the lower end surface of the oil retaining ring 10 by multiple bolts. Figure 4 As shown, the waterproof retaining ring 11 is located below the outer cover 4. A water-shedding trough 20 is provided on the outer ring of the waterproof retaining ring 11. The water-shedding trough 20 has a water-shedding slope that is tilted from top to bottom and from the inside to the outside. During use, the lower end surface of the outer cover 4 can guide water droplets into the water-shedding trough 20 of the waterproof retaining ring 11. The water droplets are then shed out by the water-shedding trough 20 to prevent the water droplets from entering the lower bearing structure.

[0033] like Figure 3 As shown, the oil retaining ring 10 is provided with multiple screw holes evenly distributed along the circumference. Each screw hole is connected to a set screw 12, which can radially contact the motor shaft 8. The motor shaft 8 is provided with an annular groove, and the set screw 12 can radially extend into the annular groove to achieve the positioning and installation of the oil retaining ring 10 on the motor shaft 8.

[0034] like Figure 7 and Figure 8As shown, the upper end surface of the oil retaining ring 10 is provided with an oil storage groove 16, which can store the incoming grease and prevent the grease from completely escaping from the lower part of the bearing 7. The lower end surface of the oil retaining ring 10 is provided with multiple oil scrapers 17, which are evenly distributed along the circumference. During the grease change period, the oil scrapers 17 can guide the waste grease into the oil outlet 14 of the outer cover 4.

[0035] like Figure 1 and Figure 6 As shown, an oil filling nozzle 13 and an oil outlet 14 are respectively provided on the left and right sides of the outer cover 4 . The staff can provide lubricating grease to the bearing 7 through the oil filling nozzle 13 , and the excess lubricating grease is discharged through the oil outlet 14 .

[0036] like Figure 3 As shown, an axially penetrating lubrication channel 18 is provided in the bearing chamber 1. The two ends of the lubrication channel 18 are connected to the oil filling nozzle 13 and the inner cavity of the inner cover 3 respectively. The lubricating oil added from the outside enters the lubrication channel 18 through the oil filling nozzle 13, and then enters the inner cover 3 through the lubrication channel 18. Figure 4 As shown, the inner ring of the inner cover 3 is provided with a plurality of annular labyrinth grooves 19, which can prevent grease from entering the interior of the motor.

[0037] like Figure 3 As shown, an insulating sleeve 5 is provided between the bearing chamber 1 and the bearing 7 for physical insulation. An insulating plate 6 is provided between the inner cover 3 and the bearing 7 for physical insulation. Spring 15 can compress and contact the insulating plate 6. A gap exists between the inner cover 3 and the motor shaft 8 and the inner ring of the bearing 7, providing spatial insulation. A gap exists between the outer cover 4 and the oil retaining ring 10 and the waterproof retaining ring 11, also providing spatial insulation.

[0038] like Figure 3 As shown, an insulating sleeve positioning ring is provided on the lower end surface of the inner cavity of the bearing chamber 1, the lower end surface of the insulating sleeve 5 is positioned and contacts the insulating sleeve positioning ring, the lower end surface of the inner cover 3 can be pressed and contacted with the insulating sleeve 5, and the inner cover 3 and the insulating sleeve positioning ring can realize the axial positioning of the insulating sleeve 5.

[0039] The end cover 2 and the bearing chamber 1 of the present invention adopt a split structure. During installation, the bearing structure except the end cover 2 is first installed on the rotor. When the rotor enters the stator, the bearing chamber 1 uses a slightly longer guide screw and the end cover bearing chamber mounting hole to guide the installation, and then the bolts are connected to realize the rotor installation. Because the end cover 2 and the bearing chamber 1 adopt a split structure, the end cover 2 is not restricted by the bearing model and is the same as the end cover of the motor with the same frame number, which simplifies the end cover mold. When processing the bearing chamber 1, the original need for large-scale vertical milling processing along with the end cover is simplified to lathe processing alone, avoiding the work of lifting large objects and reducing the demand for production equipment. The bearing chamber 1 of the present invention can be installed in advance, avoiding the traditional difficult installation process, avoiding installation errors and rework, and reducing the wear of the bearing 7 and the bearing chamber 1. The end cover 2 of the present invention is reduced in weight, which is convenient for workers to install and disassemble, and reduces the installation risk. The utility model adds an oil storage retaining ring 10 to optimize the oil storage performance and waste oil removal.

[0040] The above description is an explanation of the utility model, not a limitation of the utility model. The scope of the utility model is defined by the claims. Any form of modification can be made within the scope of protection of the utility model.

Claims

1. A lower bearing structure of a vertical motor, comprising a bearing chamber (1), characterized in that: The lower end surface of the bearing chamber (1) is detachably connected to the end cover (2) by a plurality of bolts, a bearing (7) is arranged in the inner cavity of the bearing chamber (1), and the inner ring of the bearing (7) is sleeved on the motor shaft (8); the upper and lower ends of the bearing chamber (1) are respectively provided with an inner cover (3) and an outer cover (4), and the inner cover (3) and the outer cover (4) are both sleeved on the motor shaft (8), the inner cover (3) is detachably connected to the upper end surface of the bearing chamber (1) by a plurality of bolts, and the outer cover (4) is detachably connected to the bearing chamber by a plurality of bolts. (1) lower end surface; an oil storage retaining ring (10) is mounted on the motor shaft (8), the oil storage retaining ring (10) is located between the bearing (7) and the outer cover (4), a plurality of screw holes are arranged in the oil storage retaining ring (10), each screw hole is connected to a set screw (12), the set screw (12) can radially contact the motor shaft (8), an annular groove is arranged on the motor shaft (8), the set screw (12) can radially extend into the annular groove to realize the positioning and installation of the oil storage retaining ring (10) on the motor shaft (8).

2. A lower bearing structure for a vertical motor according to claim 1, characterized in that: A bearing positioning shoulder is provided on the motor shaft (8), the upper end surface of the bearing (7) positions and contacts the bearing positioning shoulder, and the lower end surface of the bearing (7) positions and contacts the retaining spring (9), which is clamped in the clamping groove of the motor shaft (8).

3. The lower bearing structure of a vertical motor according to claim 1, characterized in that: The lower end surface of the inner cover (3) is provided with a plurality of spring installation cavities, and springs (15) are provided in the spring installation cavities. The springs (15) can press and contact the upper end surface of the bearing (7).

4. The lower bearing structure of a vertical motor according to claim 1, characterized in that: An oil storage groove (16) is provided on the upper end surface of the oil storage retaining ring (10), an oil filling nozzle (13) and an oil outlet (14) are provided on the left and right sides of the outer cover (4), and an axially penetrating lubrication channel (18) is provided in the bearing chamber (1), with both ends of the lubrication channel (18) communicating with the oil filling nozzle (13) and the inner cavity of the inner cover (3).

5. A lower bearing structure for a vertical motor according to claim 4, characterized in that: A plurality of oil scrapers (17) are provided on the lower end surface of the oil storage retaining ring (10), and the plurality of oil scrapers (17) are evenly distributed along the circumferential direction.

6. The lower bearing structure of a vertical motor according to claim 1, characterized in that: The inner ring of the inner cover (3) is provided with a plurality of annular labyrinth grooves (19).

7. The lower bearing structure of a vertical motor according to claim 1, characterized in that: The lower end of the oil storage retaining ring (10) is covered with a waterproof retaining ring (11), and the waterproof retaining ring (11) is detachably connected to the lower end surface of the oil storage retaining ring (10) through a plurality of bolts. The waterproof retaining ring (11) is located below the outer cover (4). The outer ring of the waterproof retaining ring (11) is provided with a water-throwing trough (20), and the water-throwing trough (20) has a water-throwing inclined surface arranged from top to bottom and from inside to outside.

8. The lower bearing structure of a vertical motor according to claim 7, characterized in that: An insulating sleeve (5) is provided between the bearing chamber (1) and the bearing (7), an insulating plate (6) is provided between the inner cover (3) and the bearing (7), a spring (15) is capable of pressing and contacting the insulating plate (6), a gap exists between the inner cover (3) and the motor shaft (8) and the inner ring of the bearing (7), and a gap exists between the outer cover (4) and the oil storage retaining ring (10) and the waterproof retaining ring (11).

9. A lower bearing structure for a vertical motor according to claim 8, characterized in that: An insulating sleeve positioning ring is provided on the lower end surface of the inner cavity of the bearing chamber (1); the lower end surface of the insulating sleeve (5) is positioned and contacts the insulating sleeve positioning ring; the lower end surface of the inner cover (3) can press and contact the insulating sleeve (5); the inner cover (3) and the insulating sleeve positioning ring can achieve axial positioning of the insulating sleeve (5).

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