CN218152356U

CN218152356U - Shaft seal structure of speed reducer of crane

Info

Publication number: CN218152356U
Application number: CN202222488677.7U
Authority: CN
Inventors: 刘文明; 王合永; 石赞佳; 王鹏辉; 张晓燕
Original assignee: Henan Sanzhi Equipment Technology Co ltd
Current assignee: Henan Sanzhi Equipment Technology Co ltd
Priority date: 2022-09-20
Filing date: 2022-09-20
Publication date: 2022-12-27
Anticipated expiration: 2032-09-20

Abstract

The application provides a shaft seal structure of a reducer of a crane, which comprises a rotating shaft and an adjusting sleeve, wherein the rotating shaft is rotatably arranged on a shell of the reducer; the adjusting sleeve is provided with a sliding ring in a sliding manner, the inner side of the sliding ring is provided with a convex block, the outer surface of the adjusting sleeve is provided with a straight groove, the convex block can slide in the straight groove, and the sliding ring can be fixed relative to the adjusting sleeve; the rotating shaft is provided with a movable ring, and the inner ring of the movable ring is attached to the rotating shaft; the rotating shaft is also sleeved with a spring, one end of the spring is fixedly arranged on the sliding ring, and the other end of the spring is fixedly arranged on the movable ring; the rotating shaft is also sleeved with a static ring, the inner ring of the static ring is attached to the rotating shaft, and the outer ring of the static ring is fixedly arranged on the shell of the speed reducer; the movable ring is propped against the static ring under the action of the spring; this hoist reduction gear bearing seal structure accessible is adjusted the extrusion force between the slip ring pair moving-stationary ring, guarantees that mechanical shaft seal's leakproofness is good.

Description

Shaft seal structure of speed reducer of crane

Technical Field

The utility model relates to a machinery bearing seal technique, especially a hoist reduction gear bearing seal structure.

Background

The crane refers to a multi-action hoisting machine for vertically lifting and horizontally carrying heavy objects within a certain range; in order to enable the crane to have good lifting force, a speed reducer needs to be arranged between a lifting winding drum on the crane and a motor; many driving mediums in the reduction gear need lubricating oil to lubricate, in order to guarantee that the driving medium in the reduction gear is well lubricated and the reduction gear does not seep oil, need to carry out mechanical shaft seal to the axle head of hoist reduction gear.

The mechanical shaft seal is a shaft seal device which is kept attached by one or a plurality of pairs of end faces which are vertical to the shaft and slide relatively under the action of fluid pressure and the elasticity (or magnetic force) of a compensation mechanism and matched with auxiliary sealing to achieve leakage resistance; the mechanical sealing structure consists of a static ring, a dynamic ring, an elastic element, a set screw, an auxiliary sealing ring and other elements; in order to ensure good sealing performance of the mechanical shaft seal, enough extrusion force of the extrusion surfaces of the movable ring and the static ring needs to be ensured, and the mechanical shaft seal is well attached; the extrusion force of the movable and static ring matching surface of the existing mechanical shaft seal is usually provided by a spring, the spring extrusion force is insufficient, namely, the mechanical shaft seal fails, the whole shaft seal can only be replaced, the time and the labor are consumed, and the resource waste is more.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a hoist reduction gear bearing seal structure for solve the problem of mentioning in the above-mentioned background art.

In order to solve the above problems, the utility model provides a shaft seal structure of a reducer of a crane, which comprises a rotating shaft and an adjusting sleeve, wherein the rotating shaft is rotatably arranged on a reducer shell, and the adjusting sleeve is fixedly arranged on the rotating shaft; the adjusting sleeve is provided with a sliding ring in a sliding manner, the inner side of the sliding ring is provided with a convex block, the outer surface of the adjusting sleeve is provided with a straight groove, the convex block can slide in the straight groove, and the sliding ring can be relatively fixed with the adjusting sleeve; a rotating shaft is provided with a moving ring, and the inner ring of the moving ring is attached to the rotating shaft; a spring is further sleeved on the rotating shaft, one end of the spring is fixedly arranged on the sliding ring, and the other end of the spring is fixedly arranged on the rotating ring; the rotating shaft is also sleeved with a static ring, the inner ring of the static ring is attached to the rotating shaft, and the outer ring of the static ring is fixedly arranged on the speed reducer shell; the movable ring is abutted against the fixed ring under the action of the spring.

Further, the surface of adjusting collar is equipped with the screw thread, the surface mounting of adjusting collar has the screw thread circle, the screw thread circle can laminate the slip ring keep away from one side of spring, the screw thread circle with all set up threaded hole on the slip ring.

Furthermore, a plurality of straight grooves are uniformly distributed along the circumferential direction of the adjusting sleeve, and a plurality of convex blocks are correspondingly arranged on the sliding ring.

Furthermore, a sealing ring is fixedly mounted on the inner ring of the movable ring.

Furthermore, the sealing ring is evenly distributed along the axis direction of the movable ring and is provided with a plurality of sealing rings.

Further, the stationary ring comprises a first stationary ring and a second stationary ring, and the first stationary ring and the second stationary ring are fixedly connected through bolts.

Furthermore, the upper surfaces of the first stationary ring and the second stationary ring are provided with grooves, and the reducer shell is clamped in the grooves.

Further, a sealing ring is arranged in the groove, and the sealing ring is installed between the speed reducer shell and the static ring.

Furthermore, the rotating shaft is installed in the reducer casing through a bearing, an outer ring of the bearing is fixedly connected to the reducer casing, and an inner ring of the bearing is fixedly connected with the rotating shaft.

Furthermore, a shaft shoulder is arranged on the rotating shaft, and the adjusting sleeve is fixedly arranged at the shaft shoulder.

The utility model has the advantages that: the shaft seal structure of the crane speed reducer can adjust the extrusion force between the movable ring and the stationary ring by adjusting the sliding ring, so that the good sealing property of the mechanical shaft seal is ensured; when the spring is abraded or the working fatigue causes insufficient extrusion force, the spring can be extruded by the sliding ring, the compression amount of the spring is increased, so that the extrusion force provided by the spring is restored to the standard strength again, the whole mechanical shaft seal does not need to be replaced, the maintenance is convenient and fast, and resources are saved.

Drawings

Fig. 1 is a schematic half-sectional structure view of an integral shaft seal structure according to an embodiment of the present invention;

fig. 2 is a schematic overall structure diagram of an adjusting sleeve according to an embodiment of the present invention;

fig. 3 is a schematic view of the overall structure of the slip ring according to the embodiment of the present invention;

fig. 4 is a schematic view of the overall structure of the thread ring according to the embodiment of the present invention.

In the figure: 1. a reducer housing; 2. a bearing; 3. a rotating shaft; 41. an adjusting sleeve; 42. a slip ring; 43. a thread ring; 44. a spring; 45. a moving ring; 46. a fixing hole; 47. a straight groove; 48. a bump; 51. a first stationary ring; 52. a second stationary ring.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

As shown in fig. 1 to 4, the embodiment of the shaft seal structure of the crane speed reducer of the present invention comprises a rotating shaft 2 and an adjusting sleeve 41, wherein the rotating shaft 2 is rotatably installed on the speed reducer housing 1, and the adjusting sleeve 41 is fixedly installed on the rotating shaft 2; the adjusting sleeve 41 is slidably provided with a sliding ring 42, the inner side of the sliding ring 42 is provided with a convex block 48, the outer surface of the adjusting sleeve 41 is provided with a straight groove 47, the convex block 48 can slide in the straight groove 47, and the sliding ring 42 can be relatively fixed with the adjusting sleeve 41; a rotating ring 45 is arranged on the rotating shaft 2, and the inner ring of the rotating ring 45 is attached to the rotating shaft 2; the rotating shaft 2 is also sleeved with a spring 44, one end of the spring 44 is fixedly arranged on the sliding ring 42, and the other end of the spring 44 is fixedly arranged on the movable ring 45; the rotating shaft 2 is also sleeved with a static ring, the inner ring of the static ring is attached to the rotating shaft 2, and the outer ring of the static ring is fixedly arranged on the speed reducer shell 1; the moving ring 45 is urged against the stationary ring by the spring 44.

When the shaft seal structure of the reducer of the crane is used, the adjusting sleeve 41 is fixedly arranged on the rotating shaft 2, the sliding ring 42 is fixed after the sliding ring 42 is adjusted to a proper position, the sliding ring 42 extrudes the spring 44, the spring 44 extrudes the movable ring 45, and the sealing surface on the movable ring 45 is tightly attached to the sealing surface of the static ring, namely the adjustment is finished; at the moment, the rotating shaft 2 rotates, the sealing surfaces of the movable ring 45 and the static ring are tightly attached under the extrusion force provided by the spring 44, a small gap is formed at the boundary between the sealing surfaces, when pressure oil in the speed reducer passes through the gap, an extremely thin liquid film is formed to prevent the oil in the speed reducer from leaking outwards, and meanwhile, the matching surface of the movable ring 45 and the static ring is lubricated to ensure good sealing effect; after spring 44 produced stress fatigue or wearing and tearing for a long time, the extrusion force that spring 44 provided may reduce, at this moment, readjust the position of slip ring 42, slide slip ring 42 to the direction that is close to quiet ring, increase the extrusion volume of slip ring 42 to spring 44, increase the deformation volume of spring 44, thereby improve the extrusion force that spring 44 provided, make spring 44 get back to the standard value again to the extrusion force of rotating ring 45, make this application can continue to maintain normal work, need not to change whole bearing seal structure, reduce the maintenance degree of difficulty, improve maintenance efficiency, it is extravagant to avoid remaining intact spare part.

In an embodiment of the present application, preferably, the outer surface of the adjusting sleeve 41 is provided with a thread ring 43, the thread ring 43 can be attached to one side of the sliding ring 42 away from the spring 44, and both the thread ring 43 and the sliding ring 42 are provided with threaded holes; after the slide ring 42 is adjusted to an appropriate position, the screw ring 43 is screwed to be in close contact with the slide ring 42, and then the slide ring 42 and the screw ring 43 are fixedly connected by a bolt, the slide ring 42 restricts the rotation of the screw ring 43, and the screw ring 43 restricts the sliding of the slide ring 42, thereby fixing the slide ring 42.

In one embodiment of the present application, preferably, a plurality of straight grooves 47 on the adjusting sleeve 41 are uniformly distributed along the circumferential direction of the adjusting sleeve 41, and a plurality of protrusions 48 on the sliding ring 42 are correspondingly arranged; the stress on the sliding ring 42 is more uniform, the fixation is more reliable, and the practicability of the application is improved.

In one embodiment of the present application, it is preferable that the inner ring of the movable ring 45 is fixedly provided with a sealing ring; the gap between the rotating ring 45 and the rotating shaft 2 is sealed.

In one embodiment of the present application, preferably, a plurality of seal rings are uniformly distributed along the axial direction of the movable ring 45; the reliability of the seal between the rotating ring 45 and the rotating shaft 2 is further ensured.

In one embodiment of the present application, preferably, the stationary ring includes a first stationary ring 51 and a second stationary ring 52, and the first stationary ring 51 and the second stationary ring 52 are fixedly connected by bolts; the segmentation sets up, can reduce the preparation degree of difficulty and the installation degree of difficulty of quiet ring, makes the installation of quiet ring more simple convenient.

In one embodiment of the present application, preferably, the upper surfaces of the first stationary ring 51 and the second stationary ring 52 are both provided with a groove, and the reducer casing 1 is clamped in the groove; the stationary ring is fixed.

In one embodiment of the present application, it is preferable that a seal ring is provided in the groove, and the seal ring is installed between the reducer casing 1 and the stationary ring; the sealing performance between the static ring and the reducer casing 1 is ensured, and the oil leakage inside the reducer casing 1 is prevented.

In one embodiment of the present application, preferably, the rotating shaft 2 is installed in the reducer housing 1 through a bearing 3, an outer ring of the bearing 3 is fixedly connected to the reducer housing 1, and an inner ring of the bearing 3 is fixedly connected to the rotating shaft 2; the rotation of the rotating shaft 2 is stabilized.

In one embodiment of the present application, preferably, the rotating shaft 2 is provided with a shaft shoulder, and the adjusting sleeve 41 is fixedly installed at the shaft shoulder; the adjusting sleeve 41 is convenient to position, and the installation process is simple and convenient.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. A shaft seal structure of a reducer of a crane comprises a rotating shaft and an adjusting sleeve, wherein the rotating shaft is rotatably arranged on a shell of the reducer, and the adjusting sleeve is fixedly arranged on the rotating shaft; the method is characterized in that: the adjusting sleeve is provided with a sliding ring in a sliding manner, the inner side of the sliding ring is provided with a convex block, the outer surface of the adjusting sleeve is provided with a straight groove, the convex block can slide in the straight groove, and the sliding ring can be relatively fixed with the adjusting sleeve; the rotating shaft is provided with a movable ring, and the inner ring of the movable ring is attached to the rotating shaft; a spring is further sleeved on the rotating shaft, one end of the spring is fixedly arranged on the sliding ring, and the other end of the spring is fixedly arranged on the rotating ring; the rotating shaft is also sleeved with a static ring, the inner ring of the static ring is attached to the rotating shaft, and the outer ring of the static ring is fixedly arranged on the speed reducer shell; the movable ring is pressed against the fixed ring under the action of the spring.

2. The crane decelerator shaft seal structure according to claim 1, wherein: the surface of adjusting collar is equipped with the screw thread, the surface mounting of adjusting collar has the fillet of screw, the fillet of screw can laminate keeping away from of slip ring one side of spring, the fillet of screw with all set up threaded hole on the slip ring.

3. The crane decelerator shaft seal structure according to claim 2, wherein: the straight flute on the adjusting sleeve is provided with a plurality of along the circumference equipartition of adjusting sleeve, lug on the slip ring corresponds is provided with a plurality ofly.

4. The crane decelerator shaft seal structure according to claim 1, wherein: and a sealing ring is fixedly arranged on the inner ring of the movable ring.

5. The hoist speed reducer gland seal structure according to claim 4, characterized in that: the sealing washer is followed the axis direction equipartition of rotating ring is equipped with a plurality ofly.

6. The shaft seal structure of a reducer of a crane according to claim 1, wherein: the stationary ring comprises a first stationary ring and a second stationary ring, and the first stationary ring and the second stationary ring are fixedly connected through bolts.

7. The hoist speed reducer gland seal structure according to claim 6, characterized in that: the upper surfaces of the first stationary ring and the second stationary ring are provided with grooves, and the reducer shell is clamped in the grooves.

8. The hoist speed reducer gland seal structure according to claim 7, characterized in that: and a sealing ring is arranged in the groove and is arranged between the reducer shell and the static ring.

9. The shaft seal structure of a reducer of a crane according to claim 1, wherein: the rotating shaft is installed in the speed reducer shell through a bearing, the outer ring of the bearing is fixedly connected to the speed reducer shell, and the inner ring of the bearing is fixedly connected with the rotating shaft.

10. The crane decelerator shaft seal structure according to claim 1, wherein: the rotating shaft is provided with a shaft shoulder, and the adjusting sleeve is fixedly arranged at the shaft shoulder.