CN210949800U

CN210949800U - Gear box

Info

Publication number: CN210949800U
Application number: CN201921953446.0U
Authority: CN
Inventors: 高卫明; 王少辉; 陆建花
Original assignee: Nanjing High Speed Gear Manufacturing Co Ltd
Current assignee: Nanjing High Speed Gear Manufacturing Co Ltd
Priority date: 2019-11-13
Filing date: 2019-11-13
Publication date: 2020-07-07
Anticipated expiration: 2029-11-13

Abstract

The utility model discloses a gear box, it belongs to transmission technical field, including box, pivot and set up in the box with bearing between the pivot, in the outside of bearing has set gradually labyrinth seal chamber and magnetic liquid seal chamber from inside to outside along the axial, labyrinth seal chamber includes a plurality of cavities. The labyrinth seal cavity and the magnetic liquid seal cavity are sequentially arranged on the outer side of the bearing from inside to outside along the axial direction, and the labyrinth seal cavity comprises a plurality of cavities, so that multilayer sealing is formed, and the sealing effect is improved; due to the use of the magnetic liquid sealing cavity, the magnetic liquid sealing cavity has the advantages of no abrasion, long service life, convenience in maintenance, simple structure, easiness in manufacturing and assembling, cost reduction, good sealing effect and capability of preventing lubricating oil from leaking, so that the stable operation of the gear box in the life cycle is ensured.

Description

Gear box

Technical Field

The utility model relates to the field of transmission technology, especially, relate to a gear box.

Background

Wind power is used as a renewable energy source, has strong advantages for power generation, and has the advantages of low construction cost, small occupied area, convenience in maintenance and the like compared with thermal power generation, solar energy, hydraulic power generation and other energy sources.

The high-speed shaft is one of important parts of the wind power generation gearbox and is connected with a generator through a coupler to transmit the torque of the gearbox to the generator. The high-speed shaft has the characteristics of high rotating speed, high bearing temperature caused by axial force and the like, so that the bearing and the gear of the high-speed shaft need more lubricating oil, and the high-speed sealing is very important.

The high-speed shaft seal of the traditional wind power generation gearbox adopts labyrinth seal, packing seal and V-shaped seal or adopts a sealing mode of labyrinth seal and double V-shaped seal. After the gear box is used for a period of time, the service life of the packing seal and the V-shaped seal is reduced due to abrasion and high temperature, so that the end face oil leakage phenomenon occurs, and the rubber rope and the V-shaped seal need to be replaced regularly. When the replacement is carried out regularly, the cover plate on the end face needs to be disassembled for replacement, so that the operation is inconvenient; and the packing seal and the V-seal are costly, so that the cost of the gear case increases.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a gear box to solve the technical problem that the seal structure in the gear box that exists among the prior art is short-lived, with high costs.

As the conception, the utility model adopts the technical proposal that:

the utility model provides a gear box, includes box, pivot and set up in the box with bearing between the pivot, in the outside of bearing has set gradually labyrinth seal chamber and magnetic liquid seal chamber from inside to outside along the axial, labyrinth seal chamber includes a plurality of cavities.

The permanent magnet is sleeved on the rotating shaft in the magnetic liquid sealing cavity, and pole shoes are arranged on two sides of the permanent magnet along the axial direction.

And a magnetic isolation ring is arranged on one side of the magnetic liquid sealing cavity, which is close to the labyrinth sealing cavity, and the magnetic isolation ring is clamped between the pole shoe and the inner wall of the magnetic liquid sealing cavity.

The gearbox further comprises a transparent cover sleeved on the rotating shaft, the transparent cover is connected with the box body, and a labyrinth seal cavity is formed between the bearing and the transparent cover.

The gear box further comprises an oil retainer ring sleeved on the rotating shaft, and the oil retainer ring divides the labyrinth seal cavity into a first cavity and a second cavity along the axial direction.

The gearbox further comprises an oil slinger sleeved on the rotating shaft, and the oil slinger is fixedly connected with the rotating shaft and located in the second cavity.

The gearbox further comprises a cover plate sleeved on the rotating shaft, the cover plate is connected with the transparent cover, and the magnetic liquid sealing cavity is formed between the cover plate and the transparent cover.

The rotating shaft is provided with a first distance ring on the inner side of the bearing, and the first distance ring is abutted to a shaft shoulder of the rotating shaft.

And a flange is annularly arranged on one side of the first distance ring close to the shaft shoulder, and the flange extends along the radial direction of the rotating shaft.

And a stop washer is arranged on the rotating shaft and outside the bearing, and a second distance ring is arranged between the stop washer and the bearing.

The utility model has the advantages that:

the utility model provides a gear box, through setting gradually labyrinth seal chamber and magnetic fluid seal chamber from inside to outside along the axial in the outside of bearing, and labyrinth seal chamber includes a plurality of cavities for form the multilayer and seal, improve sealed effect; due to the use of the magnetic liquid sealing cavity, the magnetic liquid sealing cavity has the advantages of no abrasion, long service life, convenience in maintenance, simple structure, easiness in manufacturing and assembling, cost reduction, good sealing effect and capability of preventing lubricating oil from leaking, so that the stable operation of the gear box in the life cycle is ensured.

Drawings

FIG. 1 is a cross-sectional view of a gearbox provided by an embodiment of the present invention;

fig. 2 is an enlarged view at a in fig. 1.

In the figure:

10. a labyrinth seal cavity; 101. a first chamber; 102. a second chamber;

20. a magnetic liquid sealed cavity;

1. a box body;

2. a rotating shaft;

3. a bearing;

41. a first pitch ring; 42. a second distance ring;

51. a transparent cover; 52. a cover plate;

61. an oil slinger; 62. an oil slinger;

71. a stop washer; 72. a round nut;

81. a permanent magnet; 82. a pole shoe; 83. magnetism isolating ring.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

Referring to fig. 1 and 2, the embodiment of the utility model provides a gear box, including box 1, pivot 2 and set up bearing 3 between box 1 and pivot 2, seted up the through-hole on the box 1, through-hole department is worn to locate by pivot 2, and bearing 3 is located the through-hole and supports pivot 2. In this embodiment, two sets of bearings 3 are provided, and the size and type of the bearings 3 can be selected according to actual needs, which is not described herein again.

The inner ring of the bearing 3 is in interference fit with the rotating shaft 2, the outer ring of the bearing 3 is in interference fit with the box body 1, the inner side of the bearing 3 is the inner part of the box body 1 along the axial direction of the rotating shaft 2, and the outer side of the bearing 3 is the outer part of the box body 1. Be provided with the chimb on the box 1, the outer lane and the chimb butt of bearing 3 to play limiting displacement.

A labyrinth seal cavity 10 and a magnetic liquid seal cavity 20 are sequentially arranged on the outer side of the bearing 3 from inside to outside along the axial direction, and the labyrinth seal cavity 10 comprises a plurality of cavities, so that multilayer sealing is formed, and the sealing effect is improved; due to the use of the magnetic liquid sealing cavity 20, the magnetic liquid sealing cavity has the advantages of no abrasion, long service life, convenience in maintenance, simple structure, easiness in manufacturing and assembling, cost reduction, good sealing effect and capability of preventing lubricating oil from leaking, so that the stable operation of the gear box in the life cycle is ensured.

The rotating shaft 2 is provided with a first distance ring 41 on the inner side of the bearing 3, and the first distance ring 41 abuts against a shoulder of the rotating shaft 2. The first distance ring 41 has the function of adjusting the distance, and the axial length of the first distance ring 41 can be selected according to actual needs. In the present embodiment, a flange is annularly provided on a side of the first distance ring 41 close to the shaft shoulder, and the flange extends in the radial direction of the rotating shaft 2. The arrangement of the flange enables the first distance ring 41 to protrude out of the outer surface of the rotating shaft 2 for a certain distance, has a certain oil blocking effect, and prevents excessive lubricating oil in the box body 1 from reaching the bearing 3. However, since the height of the flange cannot completely cover the bearing 3 and interfere with the housing 1 as required, the outer diameter of the flange is larger than the outer diameter of the shoulder and smaller than the outer diameter of the bearing 3, and the flange can be set as required.

The gear box also comprises a transparent cover 51 sleeved on the rotating shaft 2, the transparent cover 51 is connected with the box body 1, and a labyrinth seal cavity 10 is formed between the bearing 3 and the transparent cover 51. The transparent cover 51 is located outside the bearing 3 and is axially spaced from the bearing 3. The transparent cover 51 may be fixedly connected to the case 1 by bolts.

The gear box further comprises an oil retainer ring 61 sleeved on the rotating shaft 2, and the oil retainer ring 61 divides the labyrinth seal cavity 10 into a first cavity 101 and a second cavity 102 along the axial direction. The slinger 61 is positioned between the transparent cover 51 and the bearing 3, and one side of the slinger 61 is abutted against the bearing 3 and the other side is abutted against the transparent cover 51, thereby limiting the outer ring of the bearing 3. The oil slinger 61 can be fixedly connected with the box body 1 through bolts. In this embodiment, the labyrinth seal cavity 10 having two chambers is described, and in other embodiments, the labyrinth seal cavity 10 may have more than two chambers as needed, which is not described herein again.

A stopper washer 71 is provided on the rotating shaft 2 outside the bearing 3, and a second distance ring 42 is provided between the stopper washer 71 and the bearing 3. The second distance ring 42 has the function of adjusting the distance, and the axial length of the second distance ring 42 can be set according to actual needs. The stopper washer 71 has a stopper function of restricting the inner race of the bearing 3.

An annular groove is formed in the rotating shaft 2, and the stop washer 71 is clamped in the annular groove. In order to prevent the stop washer 71 from falling off, a round nut 72 is provided on the outer side of the stop washer 71, and the round nut 72 is screwed with the rotating shaft 2 to make the connection more stable.

The second distance ring 42, the stop washer 71 and the round nut 72 are all arranged in the first chamber 101. After the lubricating oil lubricates the bearing 3, the high-temperature lubricating oil returns to the oil pool of the box body 1 through the oil return hole in the first chamber 101 of the labyrinth seal cavity 10.

The gearbox further comprises an oil slinger 62 sleeved on the rotating shaft 2, and the oil slinger 62 is fixedly connected with the rotating shaft 2 and is located in the second chamber 102. Since there is a certain clearance between the slinger 61 and the slinger 62, a small amount of lubricating oil enters the second chamber 102 of the labyrinth chamber 10. When the rotating shaft 2 rotates, the oil slinger 62 is driven to rotate, so that the lubricating oil in the second chamber 102 is splashed, and the lubricating oil can enter the oil return hole and flow into an oil pool of the box body 1.

In order to achieve a better sealing effect between the first chamber 101 and the second chamber 102, the slinger 62 is located between the slinger 61 and the rotating shaft 2 and extends in the second chamber 102, and a sealing ring is disposed between the slinger 62 and the slinger 61.

One side of the oil slinger 62 close to the through cover 51 is provided with a flange in a protruding mode along the radial direction, and the oil slinger plays a role in sealing lubricating oil in the second chamber 102. The flange is provided with a protrusion, the transparent cover 51 is provided with a groove, and the protrusion is inserted into the groove.

The gearbox further comprises a cover plate 52 sleeved on the rotating shaft 2, the cover plate 52 is connected with the transparent cover 51, and a magnetic liquid sealing cavity 20 is formed between the cover plate 52 and the transparent cover 51. The cover plate 52 may be fixedly coupled to the transparent cover 51 by bolts. Since there will be a certain clearance between the oil slinger 62, the transparent cover 51 and the rotating shaft 2, a small amount of lubricating oil enters the magnetic liquid seal chamber 20.

The rotating shaft 2 in the magnetic liquid sealed cavity 20 is sleeved with a permanent magnet 81, and both sides of the permanent magnet 81 along the axial direction are provided with pole shoes 82. The magnetic liquid is arranged in the magnetic liquid sealing cavity 20, and under the action of the magnetic field force of the permanent magnet, the magnetic liquid is adsorbed and fixed at one end of the pole shoe 82, so that a gap between the magnetic liquid sealing cavity 20 and the outside is blocked, and the lubricating oil is prevented from leaking outside. The pole shoes 82 are arranged on two sides, so that the magnetic pole wires can form a closed loop, and the magnetic liquid can be firmly adsorbed conveniently.

A magnetism isolating ring 83 is arranged on one side of the magnetic liquid sealed cavity 20 close to the labyrinth sealed cavity 10, and the magnetism isolating ring 83 is clamped between the pole shoe 82 and the inner wall of the magnetic liquid sealed cavity 20. The magnetism isolating ring 83 can shield magnetism and prevent magnetic force in the magnetic liquid sealed cavity 20 from influencing other components.

In summary, when the gearbox is in use, after the bearing 3 is lubricated by the lubricating oil, the high-temperature lubricating oil returns to the oil pool of the box body 1 through the oil return hole in the first cavity 101 of the labyrinth seal cavity 10. Since there is a certain clearance between the slinger 61 and the slinger 62, a small amount of lubricating oil enters the second chamber 102 of the labyrinth chamber 10.

When the rotating shaft 2 rotates, the lubricating oil entering the second chamber 102 returns to the oil sump of the box body 1 through the oil return hole along the inner wall of the second chamber 102 under the centrifugal force generated by the rotation of the oil slinger 62.

Since there will be a certain clearance between the oil slinger 62, the transparent cover 51 and the rotating shaft 2, a small amount of lubricating oil enters the magnetic liquid seal chamber 20. Because the magnetic liquid seals the gap in the magnetic liquid sealed cavity 20, the lubricating oil is blocked in the magnetic liquid sealed cavity 20 by the magnetic liquid and returns to the oil pool of the box body 1 along the oil return hole in the magnetic liquid sealed cavity 20.

The above embodiments have been described only the basic principles and features of the present invention, and the present invention is not limited by the above embodiments, and is not departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a gear box, includes box (1), pivot (2) and set up in box (1) with bearing (3) between pivot (2), its characterized in that, in the outside of bearing (3) has set gradually labyrinth seal chamber (10) and magnetic liquid seal chamber (20) from inside to outside along the axial, labyrinth seal chamber (10) include a plurality of cavities.

2. The gearbox according to claim 1, characterized in that a permanent magnet (81) is sleeved on the rotating shaft (2) in the magnetic liquid sealed cavity (20), and pole shoes (82) are arranged on two sides of the permanent magnet (81) along the axial direction.

3. Gearbox according to claim 2, characterised in that a magnetism isolating ring (83) is arranged in the magnetic liquid sealed cavity (20) at a side close to the labyrinth sealed cavity (10), and the magnetism isolating ring (83) is clamped between the pole shoe (82) and the inner wall of the magnetic liquid sealed cavity (20).

4. The gearbox according to claim 1, characterized in that the gearbox further comprises a transparent cover (51) sleeved on the rotating shaft (2), the transparent cover (51) is connected with the box body (1), and the labyrinth sealed cavity (10) is formed between the bearing (3) and the transparent cover (51).

5. The gearbox according to claim 4, characterized in that the gearbox further comprises a slinger (61) sleeved on the rotating shaft (2), the slinger (61) axially dividing the labyrinth chamber (10) into a first chamber (101) and a second chamber (102).

6. A gearbox according to claim 5, further comprising an oil slinger (62) mounted around the shaft (2), the oil slinger (62) being fixedly connected to the shaft (2) and located in the second chamber (102).

7. The gearbox according to claim 4, further comprising a cover plate (52) sleeved on the rotating shaft (2), wherein the cover plate (52) is connected with the transparent cover (51), and the magnetic liquid sealed cavity (20) is formed between the cover plate (52) and the transparent cover (51).

8. Gearbox according to any of the preceding claims 1 to 7, characterised in that the shaft (2) is provided with a first distance ring (41) on the inside of the bearing (3), which first distance ring (41) abuts against a shoulder of the shaft (2).

9. Gearbox according to claim 8, characterised in that the side of the first distance ring (41) adjacent to the shoulder is provided with a flange extending in the radial direction of the rotor shaft (2).

10. Gearbox according to claim 8, characterised in that a stop washer (71) is arranged on the shaft (2) outside the bearing (3), and that a second distance ring (42) is arranged between the stop washer (71) and the bearing (3).