Double-insulation medium-speed permanent magnet wind driven generator bearing system

Abstract

The utility model belongs to the technical field of permanent magnet wind driven generator bearing systems, and particularly relates to a double-insulation medium-speed permanent magnet wind driven generator bearing system which comprises an outer ring, an inner ring arranged in the outer ring, a retainer arranged in an interlayer of the inner ring and the outer ring, balls mounted in the retainer, mounting grooves formed in the inner walls of the two ends of the outer ring, and positioning grooves formed in the inner walls of the mounting grooves. Clamping grooves are formed in the inner walls of the multiple positioning grooves, mounting plates are arranged in the two mounting grooves and arranged on the outer wall of the inner ring in a sleeving mode, the outer walls of the mounting plates are fixedly connected with positioning plates, the positioning plates are located in the clamping grooves, the opposite faces of the two mounting plates are fixedly connected with springs, and the other ends of the multiple springs are fixedly connected with pressing plates. The opposite faces of the pressing plate and the mounting plates are fixedly connected with limiting columns, limiting grooves are formed in the two mounting plates, the multiple limiting columns are located in the multiple limiting grooves, and the springs are located outside the limiting columns. Under the action of the mounting plate and the pressing plate, dust can be prevented from entering the bearing and acting with internal lubricating oil to be condensed into blocks to influence rotation of the bearing.

Description

Technical Field

[0001] The utility model belongs to the technical field of permanent magnet wind generator bearing systems, in particular to a double-insulated medium-speed permanent magnet wind generator bearing system. Background Art

[0002] The wind power generation structure mainly includes an impeller, a gearbox and a wind turbine. During the rotation of the impeller, the gearbox drives the wind turbine to generate electricity; the wind turbine mainly includes a generator input shaft, a stator, a rotor and a bearing mechanism.

[0003] The main shaft bearing of the generator plays the role of supporting, positioning, bearing loads, reducing friction and loss, and improving transmission efficiency. In existing bearings, the cages inside the outer and inner rings and the balls are completely exposed to the air, and dust will enter the ball grooves and cages. Since the inside of the bearings are coated with lubricating oil, the dust will become thicker and thicker over time, and the dust will condense into lumps, making it difficult for the bearings to rotate. Summary of the invention

[0004] The utility model aims to provide a double-insulated medium-speed permanent magnet wind turbine bearing system, which can prevent dust from entering the bearing and mixing with lubricating oil to condense into blocks and affect the bearing rotation.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a double-insulated medium-speed permanent magnet wind turbine bearing system, including an outer ring, an inner ring is arranged inside the outer ring, a retaining frame is arranged in the sandwich between the inner ring and the outer ring, balls are installed inside the retaining frame, and the number of balls is multiple, the inner walls of both ends of the outer ring are provided with mounting grooves, the inner walls of the mounting grooves are provided with positioning grooves, and the number of positioning grooves is multiple, the inner walls of the multiple positioning grooves are provided with card slots, and the insides of the two mounting grooves are provided with mounting plates, and the mounting plates are sleeved On the outer wall of the inner ring, the outer wall of the mounting plate is fixedly connected with a positioning plate, and there are multiple positioning plates. The positioning plate is located inside the card slot, and the opposite surfaces of the two mounting plates are fixedly connected with springs, and there are multiple springs. The other ends of the multiple springs are fixedly connected with pressure plates, and the opposite surfaces of the pressure plate and the mounting plate are fixedly connected with limiting columns, and there are multiple limiting columns. Limiting grooves are opened inside the two mounting plates, and there are multiple limiting grooves. Multiple limiting columns are located inside the multiple limiting grooves, and the spring is located outside the limiting columns.

[0006] Optionally, the inner walls of the two installation grooves are each provided with an outer ring sealing groove, and the inner wall edge of the pressure plate is provided with a pressure plate outer sealing groove.

[0007] Optionally, inner ring sealing grooves are provided on outer walls at both ends of the inner ring, and a pressing plate inner sealing groove is provided on the inner wall of the pressing plate.

[0008] Optionally, an outer sealing ring is provided inside the joint between the outer ring sealing groove and the outer sealing groove of the pressure plate, and an inner sealing ring is provided inside the joint between the inner ring sealing groove and the inner sealing groove of the pressure plate.

[0009] Optionally, the outer ring sealing groove corresponds to the position of the outer sealing groove of the pressure plate, and the inner ring sealing groove corresponds to the position of the inner sealing groove of the pressure plate.

[0010] Optionally, the outer wall of the outer ring is provided with a guide groove, and there are two guide grooves, both of which are connected to the interior of the outer ring, and the inner walls of the two guide grooves are threadedly connected with sealing bolts.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] 1. By setting mounting plates at both ends of the outer ring and the inner ring respectively, dust is prevented from entering the bearing and condensing into blocks with the lubricating oil to ensure the normal rotation of the bearing. When installing the mounting plate, put the pressure plate into the mounting groove, and make the multiple positioning plates connected to the outer wall of the mounting plate correspond to the positions of the multiple positioning grooves on the inner wall of the mounting groove in the outer ring. Press the mounting plate into the inner part of the outer ring to make the positioning plate enter the positioning groove. During this process, the mounting plate squeezes multiple springs to make them in a compressed state. After the positioning plate is completely entered into the positioning groove, rotate the mounting plate clockwise to drive the pressure plate to rotate clockwise together, so that the positioning plate rotates to the position corresponding to the slot, and then release it. The mounting plate and multiple springs rebound, driving the mounting plate and multiple positioning plates to rebound together, so that the positioning plate enters the slot, connects the mounting plate with the inner ring, and places the outer ring and the inner ring in a sealed space, preventing dust from entering the bearing and mixing with the lubricating oil to condense into blocks, affecting the rotation of the bearing. In the existing bearings, the retaining frames and balls inside the outer ring and the inner ring are completely exposed to the air, and dust will enter the ball groove and the retaining frame. Since the bearing is coated with lubricating oil, the dust will become thicker and thicker over time, and the dust will condense into blocks, causing difficulty in the rotation of the bearing. The bearing can prevent dust from entering the bearing and condensing into blocks with the internal lubricating oil to affect the rotation of the bearing.

[0013] 2. Guide grooves are respectively provided at the top and bottom of the outer ring. The lubricating oil is introduced into the enclosed space formed by the outer ring and the inner ring through the upper guide groove to provide lubrication for the bearing rotation. When replacing the lubricating oil, unscrew the lower sealing bolt to allow the lubricating oil to flow out from the lower guide groove, and then re-add new lubricating oil from the upper guide groove to facilitate the replacement and addition of lubricating oil. At the same time, an outer sealing ring and an inner sealing ring are provided to prevent the lubricating oil from leaking through the gap. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0016] Figure 2 It is a three-dimensional structural schematic diagram of the bearing of the utility model;

[0017] Figure 3 It is a three-dimensional structural schematic diagram of the positioning groove of the utility model;

[0018] Figure 4 It is a three-dimensional structural schematic diagram of the mounting plate of the utility model;

[0019] Figure 5 It is a three-dimensional structural schematic diagram of the pressing plate of the utility model;

[0020] Figure 6 It is a schematic diagram of the cross-sectional three-dimensional structure of the utility model;

[0021] Figure 7 For this utility model Figure 6 Schematic diagram of the enlarged structure at point A in the middle.

[0022] In the figure: 1. outer ring; 2. inner ring; 3. retaining frame; 4. ball; 5. mounting groove; 6. positioning groove; 7. clamping groove; 8. mounting plate; 9. positioning plate; 10. spring; 11. pressure plate; 12. limiting column; 13. limiting groove; 14. outer ring sealing groove; 15. pressure plate outer sealing groove; 16. inner ring sealing groove; 17. pressure plate inner sealing groove; 18. outer sealing ring; 19. inner sealing ring; 20. guide groove; 21. sealing bolt. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0024] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0025] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0027] Reference Figure 1-7 , a double-insulated medium-speed permanent magnet wind turbine bearing system provided by an embodiment of the utility model is now described. A double-insulated medium-speed permanent magnet wind turbine bearing system, comprising an outer ring 1, an inner ring 2 is arranged inside the outer ring 1, a retaining frame 3 is arranged in the interlayer between the inner ring 2 and the outer ring 1, a ball 4 is installed inside the retaining frame 3, and there are multiple balls 4, the inner walls of both ends of the outer ring 1 are provided with mounting grooves 5, the inner walls of the mounting grooves 5 are provided with positioning grooves 6, and there are multiple positioning grooves 6, the inner walls of the multiple positioning grooves 6 are provided with card grooves 7, the insides of the two mounting grooves 5 are provided with mounting plates 8, the mounting plates 8 are sleeved on the outer wall of the inner ring 2, and the outer wall of the mounting plate 8 is fixedly connected with A positioning plate 9, and there are multiple positioning plates 9, the positioning plate 9 is located inside the card slot 7, the opposite surfaces of the two mounting plates 8 are fixedly connected with springs 10, and there are multiple springs 10, the other ends of the multiple springs 10 are fixedly connected with pressure plates 11, the opposite surfaces of the pressure plate 11 and the mounting plate 8 are fixedly connected with limiting columns 12, and there are multiple limiting columns 12, the two mounting plates 8 are provided with limiting grooves 13 inside, and there are multiple limiting grooves 13, multiple limiting columns 12 are located inside the multiple limiting grooves 13, and the springs 10 are located outside the limiting columns 12.

[0028] When installing the mounting plate 8, place the pressure plate 11 into the mounting groove 5, and make the multiple positioning plates 9 connected to the outer wall of the mounting plate 8 correspond to the positions of the multiple positioning grooves 6 on the inner wall of the mounting groove 5 in the outer ring 1 respectively, and squeeze the mounting plate 8 toward the inside of the outer ring 1 so that the positioning plate 9 enters the positioning groove 6. During this process, the mounting plate 8 squeezes the multiple springs 10 to make them in a compressed state. Until the positioning plate 9 completely enters the positioning groove 6, rotate the mounting plate 8 clockwise to drive the pressure plate 11 to rotate clockwise together, so that the positioning plate 9 rotates to the position corresponding to the slot 7, and then release the mounting plate 8. The multiple springs 10 rebound, driving the mounting plate 8 and the multiple positioning plates 9 to rebound together, so that the positioning plate 9 enters the slot 7, so that the mounting plate 8 is connected to the inner ring 1, and the outer ring 1 and the inner ring 2 are in a sealed space to prevent dust from entering the bearing and mixing with the lubricating oil to condense into blocks and affect the rotation of the bearing.

[0029] In another embodiment of the present invention, please refer to Figures 2 to 5 The inner walls of the two mounting grooves 5 are each provided with an outer ring sealing groove 14, the inner wall edge of the pressure plate 11 is provided with a pressure plate outer sealing groove 15, the outer walls of both ends of the inner ring 2 are each provided with an inner ring sealing groove 16, the inner wall of the pressure plate 11 is provided with a pressure plate inner sealing groove 17, the outer ring sealing groove 14 corresponds to the position of the pressure plate outer sealing groove 15, the inner ring sealing groove 16 corresponds to the position of the pressure plate inner sealing groove 17, an outer sealing ring 18 is arranged inside the joint between the outer ring sealing groove 14 and the pressure plate outer sealing groove 15, and an inner sealing ring 19 is arranged inside the joint between the inner ring sealing groove 16 and the pressure plate inner sealing groove 17 to prevent the lubricating oil from leaking through the gap.

[0030] In another embodiment of the present invention, please refer to Figure 6 The outer wall of the outer ring 1 is provided with a guide groove 20 , and there are two guide grooves 20 . Both guide grooves 20 are connected to the interior of the outer ring 1 , and the inner walls of the two guide grooves 20 are threadedly connected with sealing bolts 21 .

[0031] The lubricating oil is introduced into the enclosed space formed by the outer ring 1 and the inner ring 2 through the upper guide groove 20 to provide lubrication for the bearing rotation. When replacing the lubricating oil, the lower sealing bolt 21 is unscrewed to allow the lubricating oil to flow out from the lower guide groove 20, and then new lubricating oil is re-added from the upper guide groove 20, which is convenient for replacing and adding lubricating oil.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A double-insulated medium-speed permanent magnet wind turbine bearing system, comprising an outer ring (1), characterized in that: An inner ring (2) is arranged inside the outer ring (1), a retaining frame (3) is arranged in the interlayer between the inner ring (2) and the outer ring (1), a ball (4) is installed inside the retaining frame (3), and the number of the ball (4) is multiple, the inner walls of both ends of the outer ring (1) are provided with mounting grooves (5), the inner walls of the mounting grooves (5) are provided with positioning grooves (6), and the number of the positioning grooves (6) is multiple, and the inner walls of the multiple positioning grooves (6) are provided with clamping grooves (7), and the two mounting grooves (5) are provided with mounting plates (8), the mounting plates (8) are sleeved on the outer wall of the inner ring (2), the outer wall of the mounting plate (8) is fixedly connected with a positioning plate (9), and the positioning plate There are multiple springs (9), the positioning plates (9) are located inside the card slot (7), the opposite surfaces of the two mounting plates (8) are fixedly connected with springs (10), and the number of springs (10) is multiple, the other ends of the multiple springs (10) are fixedly connected with pressure plates (11), the pressure plates (11) and the opposite surfaces of the mounting plates (8) are fixedly connected with limiting columns (12), and the number of limiting columns (12) is multiple, the two mounting plates (8) are provided with limiting grooves (13), and the number of limiting grooves (13) is multiple, multiple limiting columns (12) are located inside the multiple limiting grooves (13), and the springs (10) are located outside the limiting columns (12).

2. A double-insulated medium-speed permanent magnet wind turbine bearing system as claimed in claim 1, characterized in that: The inner walls of the two installation grooves (5) are each provided with an outer ring sealing groove (14), and the inner wall edge of the pressure plate (11) is provided with a pressure plate outer sealing groove (15).

3. A double-insulated medium-speed permanent magnet wind turbine bearing system as claimed in claim 2, characterized in that: The outer walls at both ends of the inner ring (2) are provided with inner ring sealing grooves (16), and the inner wall of the pressure plate (11) is provided with a pressure plate inner sealing groove (17).

4. A double-insulated medium-speed permanent magnet wind turbine bearing system as claimed in claim 3, characterized in that: An outer sealing ring (18) is arranged inside the joint between the outer ring sealing groove (14) and the outer sealing groove (15) of the pressure plate, and an inner sealing ring (19) is arranged inside the joint between the inner ring sealing groove (16) and the inner sealing groove (17) of the pressure plate.

5. A double-insulated medium-speed permanent magnet wind turbine bearing system as claimed in claim 3, characterized in that: The outer ring sealing groove (14) corresponds to the position of the outer sealing groove (15) of the pressure plate, and the inner ring sealing groove (16) corresponds to the position of the inner sealing groove (17) of the pressure plate.

6. A double-insulated medium-speed permanent magnet wind turbine bearing system as claimed in claim 1, characterized in that: The outer wall of the outer ring (1) is provided with a guide groove (20), and there are two guide grooves (20). Both guide grooves (20) are connected to the interior of the outer ring (1), and the inner walls of the two guide grooves (20) are threadedly connected with sealing bolts (21).

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