CN215908364U

CN215908364U - Shaft end sealing structure of speed reducer

Info

Publication number: CN215908364U
Application number: CN202122491768.1U
Authority: CN
Inventors: 黄杨; 赵海鹏; 王华龙
Original assignee: Liaoning Petrocchemical College
Current assignee: Liaoning Petrocchemical College
Priority date: 2021-10-16
Filing date: 2021-10-16
Publication date: 2022-02-25
Anticipated expiration: 2031-10-16

Abstract

The utility model provides a shaft end sealing structure of a speed reducer, which comprises a speed reducer main body, a sealing gland, a transmission shaft, a sealing static ring, a static ring sealing ring and an auxiliary sealing ring, wherein the transmission shaft is arranged in the speed reducer main body, the sealing gland is arranged at the joint of the transmission shaft and the right end surface of the speed reducer main body, the sealing static ring is arranged at the joint of the annular side surface of the transmission shaft and the speed reducer main body, the static ring sealing ring is arranged at the annular side surface of the sealing static ring, a sealing movable ring is arranged at the left side of the sealing static ring, a movable ring sealing ring is arranged at the joint of the sealing movable ring and the transmission shaft, a sealing shaft sleeve is arranged at the annular side surface of the sealing movable ring, and a locking ring is arranged at the joint of the left side surface of the annular side surface in the sealing shaft sleeve and the transmission shaft, the sealing performance of the shaft end of the speed reducer is improved.

Description

Shaft end sealing structure of speed reducer

Technical Field

The utility model discloses a shaft end sealing structure of a speed reducer, and belongs to the technical field of petrochemical engineering.

Background

General differentiation of petrochemical engineering includes chemical engineering, petroleum engineering, oil and gas engineering, storage and transportation engineering, etc., in order to make a petroleum downhole mechanical device work under an optimal working condition, a speed reduction transmission device is often required to be arranged between a prime motor and a working machine of the petroleum downhole mechanical device, and the speed reducer is an independent part consisting of gear transmission, worm transmission and gear-worm transmission which are enclosed in a rigid shell and is commonly used as the speed reduction transmission device between the prime motor and the working machine. The speed reducer is generally used for transmission equipment with low rotating speed and large torque, and the purpose of reducing speed is achieved by meshing a motor, an internal combustion engine or other high-speed running power with a large gear on an output shaft through a gear with a small number of teeth on an input shaft of the speed reducer.

In the prior art, the sealing effect of the shaft end of the existing speed reducer is not good enough, the sealing structure can fail after long-time use, the oil leakage phenomenon occurs, the sealing structure part needs to be replaced, and the problem of the occurrence of the sealing structure of the shaft end of the speed reducer is urgently needed.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model aims to provide a shaft end sealing structure of a speed reducer, which aims to solve the problems in the background art.

In order to achieve the purpose, the utility model is realized by the following technical scheme: a shaft end sealing structure of a speed reducer comprises a speed reducer body, a sealing gland, a transmission shaft, a sealing static ring, a static ring sealing ring and an auxiliary sealing ring, wherein the transmission shaft is arranged inside the speed reducer body, the sealing gland is arranged at the joint of the right end face of the transmission shaft and the speed reducer body, the sealing static ring is arranged at the joint of the annular side face of the transmission shaft and the speed reducer body, the static ring sealing ring is arranged on the annular side face of the sealing static ring, a sealing movable ring is arranged on the left side of the sealing static ring, the movable ring sealing ring is arranged at the joint of the sealing movable ring and the transmission shaft, a spring is sleeved on the annular side face of the sealing movable ring, a sealing shaft sleeve with the left part in a reducing shape is arranged outside the sealing movable ring, a locking ring is arranged between the reducing part in the sealing shaft sleeve and the transmission shaft, a limiting ring is arranged between the locking ring and the sealing movable ring in the sealing shaft sleeve, a sealing oil cavity is arranged inside the sealing shaft sleeve, the sealing device is characterized in that a magnetic sealing patch is arranged at the joint of the sealing static ring and the sealing moving ring, an auxiliary sealing ring is assembled at the joint of the sealing shaft sleeve and the reducer body, a first sealing groove is formed in the reducer body, and a second sealing groove is formed in the left side of the first sealing groove.

Further, the inner diameter of the locking ring is the same as that of the transmission shaft, the diameter of the locking ring is the same as that of the sealing shaft sleeve, and the inner diameters of the locking ring, the sealing movable ring, the sealing static ring and the sealing gland are the same.

Furthermore, sealing lubricating oil is filled in the sealing oil cavity, and sealing lubricating oil is filled in the sealing gland.

Furthermore, the specification of the first sealing groove is matched with that of the static ring sealing ring, the static sealing ring is hermetically connected with the first sealing groove through the static ring sealing ring, the specification of the second sealing groove is matched with that of the auxiliary sealing ring, and the sealing shaft sleeve is hermetically connected with the second sealing groove through the auxiliary sealing ring.

Furthermore, fastening bolts are arranged inside the joints of the sealing gland and the speed reducer main body and penetrate through the sealing gland and are fixedly connected with the speed reducer main body through threads.

Furthermore, a sealing end cover is arranged at the joint of the left end of the sealing shaft sleeve and the locking ring, and the sealing end cover is in clearance fit with the transmission shaft.

The utility model has the beneficial effects that: according to the shaft end sealing structure of the speed reducer, the sealing gland, the sealing static ring, the static ring sealing ring, the auxiliary sealing ring, the sealing shaft sleeve, the locking ring, the sealing movable ring, the movable ring sealing ring and the magnetic sealing patch are added, so that the transmission shaft can be in a double sealing state through the sealing static ring, the sealing movable ring and the sealing shaft sleeve, the transmission shaft is always in a sealing state, the oil leakage phenomenon is reduced, and the sealing performance of the shaft end of the speed reducer is improved.

Drawings

Other features, objects and advantages of the utility model will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a schematic structural diagram of a shaft end sealing structure of a speed reducer according to the present invention;

FIG. 2 is a front cross-sectional view of a reducer shaft-end seal structure of the present invention;

FIG. 3 is a left side view of a reducer shaft end seal structure of the present invention;

FIG. 4 is a right side view of a reducer shaft end seal structure of the present invention;

in the figure: 1-a speed reducer main body, 2-a sealing gland, 3-a transmission shaft, 4-a sealing stationary ring, 5-a stationary ring sealing ring, 6-an auxiliary sealing ring, 7-a sealing shaft sleeve, 8-a locking ring, 9-a sealing oil cavity, 10-a sealing movable ring, 11-a movable ring sealing ring, 12-a magnetic sealing patch, 13-a first sealing groove, 14-a second sealing groove, 15-a sealing end cover, 16-a limiting ring and 17-a spring.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the utility model easy to understand, the utility model is further described with the specific embodiments.

Referring to fig. 1-4, the present invention provides a technical solution: a shaft end sealing structure of a speed reducer comprises a speed reducer body 1, a sealing gland 2, a transmission shaft 3, a sealing static ring 4, a static ring sealing ring 5 and an auxiliary sealing ring 6, wherein the transmission shaft 3 is arranged in the speed reducer body 1, the sealing gland 2 is arranged at the joint of the transmission shaft 3 and the right end face of the speed reducer body 1, the sealing static ring 4 is arranged at the joint of the annular side face of the transmission shaft 3 and the speed reducer body 1, the static ring sealing ring 5 is arranged at the annular side face of the sealing static ring 4, a sealing movable ring 10 is arranged at the left side of the sealing static ring 4, a movable ring sealing ring 11 is arranged at the joint of the sealing movable ring 10 and the transmission shaft 3, a spring 17 is sleeved at the annular side face of the sealing movable ring 10, a left-side reducing sealing shaft sleeve 7 is arranged outside the sealing movable ring 10, a locking ring 8 is arranged between the reducing part of the sealing shaft sleeve 7 and the transmission shaft 3, and a limiting ring 16 is arranged between the locking ring 8 and the sealing movable ring 10 in the sealing shaft sleeve 7, inside sealed oil pocket 9 that is provided with of sealed axle sleeve 7, sealed quiet ring 4 is provided with magnetism seal paster 12 with sealed rotating ring 10 junction, sealed axle sleeve 7 is equipped with auxiliary seal circle 6 with 1 junction of reduction gear main part, first seal groove 13 has been seted up to 1 inside of reduction gear main part, first seal groove 13 left side is provided with second seal groove 14, this design can be through sealed quiet ring 4, sealed rotating ring 10 and sealed axle sleeve 7 carry out double sealing to transmission shaft 3, make transmission shaft 3 be in encapsulated situation all the time, reduce the emergence of oil leak phenomenon, the leakproofness of reduction gear axle head has been improved.

The inner diameter of the locking ring 8 is the same as that of the transmission shaft 3, the diameter of the locking ring 8 is the same as that of the sealing shaft sleeve 7, the inner diameters of the locking ring 8, the movable sealing ring 10, the stationary sealing ring 4 and the sealing gland 2 are the same, sealing lubricating oil is filled in the sealing oil cavity 9, sealing lubricating oil is filled in the sealing gland 2, a layer of oil film can be formed at the joint through the sealing lubricating oil, and the sealing effect is achieved on the joint.

The specification of the first sealing groove 13 is matched with the specification of the static ring sealing ring 5, the static sealing ring 4 is hermetically connected with the first sealing groove 13 through the static ring sealing ring 5, the specification of the second sealing groove 14 is matched with the specification of the auxiliary sealing ring 6, and the sealing shaft sleeve 7 is hermetically connected with the second sealing groove 14 through the auxiliary sealing ring 6, so that the sealing performance of the joint is improved.

Fastening bolts are arranged inside the joints of the sealing gland 2 and the speed reducer main body 1, penetrate through the sealing gland 2 and are fixedly connected with the speed reducer main body 1 through threads, and the sealing gland 2 is conveniently installed and fixed through the fastening bolts.

The joint of the left end of the sealing shaft sleeve 7 and the locking ring 8 is connected with a sealing end cover 15 through threads, and the sealing end cover 15 is in clearance fit with the transmission shaft 13.

During installation, the static ring sealing ring 5 is firstly installed in the first sealing groove 13, the static sealing ring 4 is installed on the annular side face of the transmission shaft 3, the movable sealing ring 10 and the limiting ring 16 are installed on the left side of the static sealing ring 4, meanwhile, the magnetic sealing patch 12 is installed at the joint of the static sealing ring 4 and the movable sealing ring 10, the static sealing ring 4 and the movable sealing ring 10 can be in sealing connection through the magnetism of the magnetic sealing patch 12, then the spring 17 and the sealing shaft sleeve 7 are installed on the annular side face of the movable sealing ring 10, the locking ring 8 and the sealing end cover 15 are installed, the transmission shaft 3 is further sealed through the sealing shaft sleeve 7, the locking ring 8 and the sealing end cover 15, oil leakage of the transmission shaft 3 is reduced, and the sealing performance of the shaft end of the speed reducer is improved.

While there have been shown and described what are at present considered the fundamental principles and essential features of the utility model and its advantages, it will be apparent to those skilled in the art that the utility model is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a reduction gear axle head seal structure, includes reduction gear main part (1), gland (2), transmission shaft (3), sealed quiet ring (4), quiet ring seal (5) and auxiliary seal (6), its characterized in that: the sealing device is characterized in that a transmission shaft (3) is arranged inside a speed reducer main body (1), a sealing gland (2) is arranged at the joint of the transmission shaft (3) and the right end face of the speed reducer main body (1), a sealing static ring (4) is arranged at the joint of the annular side face of the transmission shaft (3) and the speed reducer main body (1), a static ring sealing ring (5) is arranged at the annular side face of the sealing static ring (4), a sealing dynamic ring (10) is arranged on the left side of the sealing static ring (4), a dynamic ring sealing ring (11) is arranged at the joint of the sealing dynamic ring (10) and the transmission shaft (3), a spring (17) is sleeved on the annular side face of the sealing dynamic ring (10), a left-side reducing sealing shaft sleeve (7) is externally arranged, a locking ring (8) is arranged between an internal reducing part of the sealing shaft sleeve (7) and the transmission shaft (3), and a limiting ring (16) is arranged between the locking ring (8) and the sealing dynamic ring (10) in the sealing shaft sleeve (7), the sealing device is characterized in that a sealing oil cavity (9) is formed in the sealing shaft sleeve (7), a magnetic sealing patch (12) is arranged at the joint of the sealing static ring (4) and the sealing moving ring (10), an auxiliary sealing ring (6) is assembled at the joint of the sealing shaft sleeve (7) and the speed reducer main body (1), a first sealing groove (13) is formed in the speed reducer main body (1), and a second sealing groove (14) is formed in the left side of the first sealing groove (13).

2. A reducer shaft-end sealing structure according to claim 1, characterized in that: the inner diameter of the locking ring (8) is the same as that of the transmission shaft (3), the diameter of the locking ring (8) is the same as that of the sealing shaft sleeve (7), and the inner diameters of the locking ring (8), the sealing movable ring (10), the sealing static ring (4) and the sealing gland (2) are the same.

3. A reducer shaft-end sealing structure according to claim 1, characterized in that: the sealing oil cavity (9) is filled with sealing lubricating oil, and the sealing gland (2) is filled with sealing lubricating oil.

4. A reducer shaft-end sealing structure according to claim 1, characterized in that: first seal groove (13) specification and quiet ring seal (5) specification phase-match, sealed quiet ring (4) are through quiet ring seal (5) and first seal groove (13) sealing connection, second seal groove (14) specification and auxiliary seal circle (6) specification phase-match, sealed axle sleeve (7) are through auxiliary seal circle (6) and second seal groove (14) sealing connection.

5. A reducer shaft-end sealing structure according to claim 1, characterized in that: fastening bolts are arranged inside the joints of the sealing gland (2) and the speed reducer main body (1) and penetrate through the sealing gland (2) and the speed reducer main body (1) to be fixedly connected through threads.

6. A reducer shaft-end sealing structure according to claim 1, characterized in that: and a sealing end cover (15) is arranged at the joint of the left end of the sealing shaft sleeve (7) and the locking ring (8), and the sealing end cover (15) is in clearance fit with the transmission shaft (3).