CN210510283U - Reducer output shaft sealing device of shield construction electric locomotive - Google Patents
Reducer output shaft sealing device of shield construction electric locomotive Download PDFInfo
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- CN210510283U CN210510283U CN201921376309.5U CN201921376309U CN210510283U CN 210510283 U CN210510283 U CN 210510283U CN 201921376309 U CN201921376309 U CN 201921376309U CN 210510283 U CN210510283 U CN 210510283U
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- output shaft
- speed reducer
- sealing device
- retainer ring
- electric locomotive
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Abstract
The utility model provides a shield constructs speed reducer output shaft sealing device of electric locomotive for construction. The speed reducer output shaft sealing device comprises an output shaft penetrating out of a speed reducer box body, a bearing arranged at the position of the output shaft penetrating out of the speed reducer box body and a sealing retainer ring arranged outside the bearing, and is characterized in that: the two side faces of the sealing retainer ring are respectively provided with a groove for mounting a framework oil seal at the edge of the inner ring in contact with the output shaft, an annular retainer ring is formed between the two grooves, the groove opening close to one side of the reducer box body is communicated with the lubricating grease cavity of the reducer box body, and the framework oil seals are respectively mounted in the grooves on the two sides. The utility model discloses, both can prevent that the inside lubricating oil of box from outwards revealing, can prevent the outside inside infiltration of moisture of box again, both sides all play double seal, great reduction lubricating oil reveal with cause rotten phenomenon because of the moisture invasion.
Description
Technical Field
The utility model relates to a tunnel shield constructs construction technical field, especially relates to a speed reducer output shaft sealing device of electric locomotive is used in construction of city subway shield.
Background
The speed reducer, which is a relatively precise machine used for the purpose of reducing the rotational speed and increasing the torque, plays a role of matching the rotational speed and transmitting the torque between the prime mover and the working machine or the actuator. The inside of the speed reducer is generally filled with lubricating oil with a certain pressure, and when the speed reducer works, the lubricating oil is easy to leak from an output shaft of the speed reducer, so that the waste of the lubricating oil is caused, and the operation of the speed reducer is influenced, and a leakage-proof sealing device needs to be added at the output shaft of the speed reducer. The existing sealing device for the output shaft of the speed reducer of the industrial and mining locomotive adopts a labyrinth sealing structure as shown in fig. 3 and 4, wherein a sealing retainer ring 1 is a fixed part, a speed reducer output shaft 3 is a rotating part, the inner ring of the sealing retainer ring 1 is provided with a plurality of tortuous small chambers, and is combined with the speed reducer output shaft to form a plurality of sequentially arranged annular sealing teeth, a series of interception gaps and expansion cavities are formed between the teeth, gear oil in the speed reducer generates a throttling effect when passing through the gaps of the tortuous labyrinth to achieve the purpose of leakage resistance, and the phenomenon is called as a labyrinth effect.
Although theoretically, labyrinth seal can satisfy the use needs of industrial and mining locomotive speed reducer, in the in-service use process, because the operating mode environment is more abominable, speed reducer gear oil leakage phenomenon often appears, through the analysis, mainly by following reason cause:
(1) the fit clearance of the sealing pair (the sealing retainer ring and the output shaft of the speed reducer) is too large, and the clearance is inversely proportional to the sealing effect; the matching surface is rough, and the obvious spiral lathe tool marks increase the leakage tendency under some conditions;
(2) the lubricating oil is injected into the bearing chamber too much, and the overflow pressure exceeds the sealing resistance;
(3) the viscosity of the oil is reduced due to the temperature rise of the oil in operation, and the possibility of leakage is increased;
(4) the size of the oil return groove or the oil return hole is smaller or is blocked by the oil return groove or the oil return hole, so that the blocked liquid can not return smoothly to cause leakage;
(5) silt is attached to an output shaft of the speed reducer and causes certain abrasion to a labyrinth of the retainer ring;
(6) labyrinth seals need only have good sealed effect when the part linear velocity that rotates reaches 2m/s, and the electric locomotive of city subway shield construction often traveles under lower speed, also can leak oil because of not reaching anticipated sealed effect.
Disclosure of Invention
The utility model discloses according to prior art's not enough, in order to reduce electric locomotive speed reducer output shaft sealing device's the oil leak condition, provide a speed reducer output shaft sealing device of electric locomotive is used in city subway shield construction, this sealing device both can prevent that the inside lubricating oil of box from outwards revealing, can prevent the inside infiltration of box outside moisture again, can greatly reduced lubricating oil reveal and cause rotten phenomenon because of the moisture invasion.
In order to solve the technical problem, the utility model provides a technical scheme: the utility model provides a shield constructs speed reducer output shaft sealing device of electric locomotive for construction, includes the output shaft of wearing out the speed reducer box, establishes and wears out speed reducer box position bearing and sets up the sealing ring in the bearing outside at the output shaft, its characterized in that: the two side faces of the sealing retainer ring are respectively provided with a groove for mounting a framework oil seal at the edge of the inner ring in contact with the output shaft, an annular retainer ring is formed between the two grooves, the groove opening close to one side of the reducer box body is communicated with the lubricating grease cavity of the reducer box body, and the framework oil seals are respectively mounted in the grooves on the two sides. After lubricating oil in the speed reducer box body enters the groove on the side of the speed reducer box body, a first seal is formed through the framework oil seal in the groove, and after the grease permeates into a gap between the annular retainer ring and the output shaft, a sealing oil film is formed in the gap, namely a second seal.
The utility model discloses better technical scheme: the roughness of the contact surface of the sealing retainer ring and the framework oil seal is 3.2 microns, and the roughness of the contact surface of the framework oil seal and the output shaft is 0.8 micron.
The utility model discloses better technical scheme: the thickness of an annular retainer ring formed between the two grooves is 8mm, and the width of a gap between the annular retainer ring and the output shaft is 0.35mm
The utility model discloses better technical scheme: the diameter of the framework oil seal is equal to the inner diameter of the groove.
The utility model discloses cancelled the labyrinth cavity of labyrinth seal, processed the mounting groove of two skeleton oil seals in the retaining ring both sides, installed two skeleton oil seals in the mounting groove, the dog forms three sealings between two skeleton oil seals and two mounting grooves. The internal diameter of the framework oil seal in a free state is smaller than the shaft diameter, namely, the framework oil seal has certain interference, so that after the oil seal is arranged on an oil seal seat and a shaft, the pressure of the cutting edge of the oil seal and the contraction force of a self-tightening spiral spring generate certain radial tightening force on the shaft, and after the framework oil seal operates for a period of time, the pressure can be rapidly reduced or even disappear, and therefore, the self-tightening force of the oil seal can be compensated at any time by the spring. An oil film controlled by the cutting edge of the oil seal exists between the stop block between the two oil seals and the shaft, the oil film has the characteristic of fluid lubrication, and under the action of the surface tension of the liquid, the rigidity of the oil film just enables the oil film and an air contact end to form a crescent surface, so that the leakage of a working medium is prevented, and the sealing of the rotating shaft is realized. The sealing capability of the oil seal depends on the thickness of an oil film on a sealing surface, the thickness is overlarge, and the oil seal leaks; if the thickness is too small, dry friction can occur, which causes abrasion of the oil seal and the shaft; and an oil film does not exist between the sealing lip and the shaft, so that heating and abrasion are easily caused.
The utility model discloses after installing two skeleton oil seals, the inside skeleton oil seal can prevent that the inside lubricating oil of box from outwards revealing, and outside skeleton oil seal can prevent the outside moisture of box from inwards permeating, and the dog between inboard skeleton oil seal and the outside skeleton oil seal forms the third and seals, both can prevent that the inside lubricating oil of box from outwards revealing, can prevent the outside moisture of box from inwards permeating again, and double seal is all played to both sides, great reduction lubricating oil reveal with cause rotten phenomenon because of the moisture invasion.
Drawings
Fig. 1 is a schematic structural view of the sealing device of the present invention;
FIG. 2 is an enlarged schematic view of portion A of FIG. 1;
FIG. 3 is a schematic view of a prior art sealing device;
fig. 4 is an enlarged schematic view of a portion B in fig. 3.
1-sealing retainer ring, 2-groove, 3-output shaft, 4-speed reducer box, 5-annular retainer ring, 6-framework oil seal, 6-1-spring of framework oil seal, 7-gap, and 8-bearing.
Detailed Description
The present invention will be further explained with reference to the drawings and examples. Fig. 1 to 4 are drawings of the embodiment, which are drawn in a simplified manner and are only used for clearly and concisely illustrating the purpose of the embodiment of the present invention. The following detailed description of the embodiments of the present invention is presented in the drawings and is not intended to limit the scope of the invention as claimed. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "inner", "outer", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships that are conventionally placed when the products of the present invention are used, or orientations or positional relationships that are conventionally understood by those skilled in the art, and are merely for convenience of description of the present invention and simplifying the description, but do not indicate or imply that the device or element that is referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
The embodiment provides a speed reducer output shaft sealing device of an electric locomotive for shield construction, as shown in fig. 1 and fig. 2, the device comprises an output shaft 3 penetrating through a speed reducer box body 4, a bearing 8 arranged at the position where the output shaft 3 penetrates through the speed reducer box body 4, and a sealing retainer ring 1 arranged at the outer side of the bearing 8, wherein the sealing retainer ring 1 is partially arranged in the speed reducer box body 4 as shown in fig. 1, and partially arranged at the outer side of the speed reducer box body 4, grooves 2 for installing a framework oil seal are respectively arranged at the edges of inner rings at two side surfaces of the sealing retainer ring 1, which are contacted with the output shaft 3, one of the two grooves 2 is arranged in the speed reducer box body 4, the notch of the two grooves is communicated with a lubricating grease cavity of the speed reducer box body 4, the other groove is arranged at the outer side, ensuring that the output shaft can normally rotate; and framework oil seals 6 are respectively arranged in the grooves 2 at the two sides, and the diameter of each framework oil seal 6 is equal to the inner diameter of each groove 2. The roughness of the contact surface of the sealing retainer ring 1 and the framework oil seal 6 is 3.2 microns, and the roughness of the contact surface of the framework oil seal 6 and the output shaft 3 is 0.8 micron.
The utility model discloses when the installation, skeleton oil blanket 6 and retainer ring 1 must keep totally, and whether the size of inspection skeleton oil blanket 6 and retainer ring 1 conforms, ensures that the lip not damaged of skeleton oil blanket 6 warp, and spring 6-1 does not drop, rust. Sundries such as burrs, scrap iron and the like cannot exist in the groove 2 of the sealing retainer ring 1. When assembling the framework oil seal, lithium-based lubricating grease must be coated on the lip of the framework oil seal 6, and meanwhile, the framework oil seal 6 is vertical to the axial lead, if the framework oil seal is not vertical, the sealing lip of the framework oil seal 6 can dry lubricating oil from the shaft, excessive abrasion of the sealing lip can be caused, and oil pressure equipment or sleeve tools are suggested to be adopted for installation. The pressure is not too high, and the speed is uniform and slow. During operation, the lubricant in the case slightly oozes out to achieve the most desirable state of forming an oil film at the seal surface.
The above description is only one embodiment of the present invention, and the description is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (4)
1. The utility model provides a shield constructs speed reducer output shaft sealing device of electric locomotive for construction, includes output shaft (3) of wearing out speed reducer box (4), establishes and wears out speed reducer box (4) position bearing (8) and sets up sealing ring (1) in bearing (8) outside in output shaft (3), its characterized in that: the inner ring edge that contacts at sealed retaining ring (1) both sides face and output shaft (3) offers respectively and is used for installing recess (2) of skeleton oil blanket, forms annular retaining ring (5) between two recess (2), is close to recess (2) notch and the lubricating grease chamber intercommunication of speed reducer box (4) one side to install skeleton oil blanket (6) respectively in recess (2) of both sides.
2. The reducer output shaft sealing device of the shield construction electric locomotive according to claim 1, characterized in that: the roughness of the contact surface of the sealing retainer ring (1) and the framework oil seal (6) is 3.2 microns, and the roughness of the contact surface of the framework oil seal (6) and the output shaft (3) is 0.8 micron.
3. The reducer output shaft sealing device of the shield construction electric locomotive according to claim 1, characterized in that: the thickness of an annular retainer ring (5) formed between the two grooves (2) is 8mm +/-0.2 mm, and the width of a gap (7) between the annular retainer ring (5) and the output shaft (3) is 0.35 mm.
4. The reducer output shaft sealing device of the shield construction electric locomotive according to claim 1, characterized in that: the diameter of the framework oil seal (6) is equal to the inner diameter of the groove (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921376309.5U CN210510283U (en) | 2019-08-22 | 2019-08-22 | Reducer output shaft sealing device of shield construction electric locomotive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921376309.5U CN210510283U (en) | 2019-08-22 | 2019-08-22 | Reducer output shaft sealing device of shield construction electric locomotive |
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| Publication Number | Publication Date |
|---|---|
| CN210510283U true CN210510283U (en) | 2020-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921376309.5U Active CN210510283U (en) | 2019-08-22 | 2019-08-22 | Reducer output shaft sealing device of shield construction electric locomotive |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112696496A (en) * | 2020-12-14 | 2021-04-23 | 珠海格力电器股份有限公司 | Oil seal structure and motor |
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2019
- 2019-08-22 CN CN201921376309.5U patent/CN210510283U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112696496A (en) * | 2020-12-14 | 2021-04-23 | 珠海格力电器股份有限公司 | Oil seal structure and motor |
| CN112696496B (en) * | 2020-12-14 | 2022-06-17 | 珠海格力电器股份有限公司 | Oil seal structure and motor |
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