CN216589617U

CN216589617U - Input shaft sealing structure

Info

Publication number: CN216589617U
Application number: CN202220116652.1U
Authority: CN
Inventors: 张宏飞; 王贇飞
Original assignee: Wuxi Oriental Changfeng Marine Propulsion Co ltd
Current assignee: Wuxi Oriental Changfeng Marine Propulsion Co ltd
Priority date: 2022-01-17
Filing date: 2022-01-17
Publication date: 2022-05-24
Anticipated expiration: 2032-01-17

Abstract

The utility model relates to an input shaft sealing structure which comprises an input shaft, wherein the input shaft is connected with a bearing seat through a bearing, one end of the bearing seat is connected with a sealing seat, the bearing seat is connected with an oil inlet pipeline and a first recovery pipeline, the input shaft is arranged at the inner side part of the sealing seat and sleeved with a first shaft sleeve, an oil seal is arranged between the first shaft sleeve and the sealing seat, one side of the sealing seat, far away from the bearing seat, is connected with a recovery cover, the recovery cover is connected with a second recovery pipeline, and the outer side of the sealing seat is connected with the recovery cover, so that a certain amount of leakage can be allowed between the oil seal and the first shaft sleeve, a larger clearance fit can be adopted between the oil seal and the first shaft sleeve, the effects of reducing friction force and heating are achieved, the service life of the oil seal can be prolonged, the replacement period is prolonged, and the purpose of saving cost is achieved.

Description

Input shaft sealing structure

Technical Field

The utility model relates to ship equipment, in particular to an input shaft sealing structure.

Background

The full-rotation rudder propeller is a Z-shaped propeller with functions of propeller propulsion and a steering engine, and the underwater part of the propeller can freely rotate around a central shaft for 360 degrees, so that omnibearing thrust is provided; the ship propulsion system has the characteristics of high propulsion efficiency, low noise and excellent operation, and is widely applied to various ships at present; the full-turning rudder propeller is different from a conventional flat shaft propulsion propeller, and has an upper reduction ratio and a lower reduction ratio, so that the rotating speed of an input shaft of the propeller is higher under the same rotating speed of the propeller, and is generally common to 1800 revolutions per minute; this results in a relatively high rotational linear velocity of the rubber seal of the input shaft; however, the higher the line speed, the higher the accuracy requirements for the mating surface parts and the higher the heat generation. This results in short oil seal life, easy aging and cracking; frequent replacement of the oil seal wastes time and labor, and is poor in economy; conventional oil seals generally have the suggested tolerances for their fit, and if the fit is too loose, the lip and shaft pressure is reduced, thereby reducing friction and heat generation, but too loose a fit can result in unreliable seals and significant leakage.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned shortcomings of the prior art, it is an object of the present invention to provide an input shaft seal structure to solve one or more problems of the prior art.

In order to realize the purpose, the technical scheme of the utility model is as follows:

the utility model provides an input shaft seal structure, includes the input shaft, the input shaft passes through the bearing connection bearing frame, the seal receptacle is connected to bearing frame one end, oil inlet pipeline and first recovery pipeline are connected to the bearing frame, the input shaft is located the inside portion cover of seal receptacle and establishes first axle sleeve, set up the oil blanket between first axle sleeve and the seal receptacle, the seal receptacle is kept away from bearing frame one side and is connected the recovery cover, the second recovery pipeline is connected to the recovery cover.

As a further improvement of the technical scheme:

the bearing seat is connected with the input shaft through two bearings, a positioning convex ring for positioning the two bearings is arranged in the bearing seat, and the oil inlet pipeline is connected between the two bearings.

The first recovery pipeline is connected with the bearing seat through a variable joint.

The sealing seat part is worn in the bearing frame, just the sealing seat passes through connecting bolt and is connected with the bearing frame, set up first sealing washer between sealing seat and the bearing frame.

And a positioning groove for positioning the oil seal is arranged on the inner side of the sealing seat.

The recovery cover is connected with the sealing seat through a connecting bolt, and the recovery cover is provided with a yielding through hole for the yielding sealing seat connecting bolt.

And the inner side of the first shaft sleeve is connected with a second sealing ring.

The input shaft is positioned at the inner side part of the recovery cover and sleeved with a second shaft sleeve.

The second shaft sleeve is sleeved with a V-shaped end face water seal, the input shaft is in threaded connection with a locking nut, and the V-shaped end face water seal is tightly pressed on the outer end face of the recovery cover through the locking nut.

And the second shaft sleeve is sleeved with a gasket at a position between the V-shaped end surface water seal and the locking nut.

Compared with the prior art, the utility model has the following beneficial technical effects:

1) the recovery cover is connected to the outer side of the sealing seat, so that a certain amount of leakage can be allowed between the oil seal and the first shaft sleeve, and the oil seal and the first shaft sleeve can be in large clearance fit, so that the pressing force between the oil seal and the first shaft sleeve is reduced, the friction force is reduced, and the heating can be reduced;

2) similarly, a certain amount of leakage can be allowed between the oil seal and the first shaft sleeve, so that a thin oil film is formed between the oil seal and the first shaft sleeve, and the effects of reducing friction force and heating are also achieved, so that the service life can be prolonged, the replacement period is prolonged, and the cost is saved;

3) In order to prevent that oil blanket department pressure is too high, and the oil blanket and the great lubricating oil that leads to of first axle sleeve clearance leak in a large number, the first recovery pipe of bushing connection, after pressure risees, unnecessary lubricating oil will flow back to the oil tank from first recovery pipe, prevents that lubricating oil from leaking in a large number.

4) The first recovery pipe adopts a variable joint connecting bearing seat, and the effect of adjusting the pressure of the discharged lubricating oil is achieved by replacing joints with different diameters;

5) a V-shaped end surface water seal is arranged for sealing the recovery cover, so that protection is added, and lubricating oil is prevented from leaking out of the recovery cover;

6) the packing pieces with different thicknesses are selected to control the compression amount between the V-shaped end surface water seal and the end surface of the recovery cover, so that the period for replacing the V-shaped end surface water seal can be prolonged.

Drawings

Fig. 1 is a sectional view showing an input shaft seal structure according to the first embodiment.

Fig. 2 shows a sectional view of the input shaft seal structure of the second embodiment.

Fig. 3 shows an enlarged view at a in fig. 2.

In the drawings, the reference numbers:

1. an input shaft; 2. a bearing; 3. a bearing seat; 31. an oil inlet pipeline; 32. a first recovery line; 33. positioning the convex ring; 4. a sealing seat; 41. positioning a groove; 42. a yielding through hole; 5. a first bushing; 6. oil sealing; 7. a recovery cover; 71. a second recovery line; 8. a second shaft sleeve; 9. water sealing of the V-shaped end surface; 10. locking the nut; 11. and (7) a gasket.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the following detailed description of the present invention is provided with reference to the accompanying drawings and the detailed description. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are in a very simplified form and are not to precise scale, and are provided for the purpose of facilitating and clearly illustrating embodiments of the present invention. To make the objects, features and advantages of the present invention more comprehensible, reference is made to the accompanying drawings. It should be understood that the structures, ratios, sizes, etc. shown in the drawings and attached to the present specification are only used for matching the disclosure and are not used for limiting the implementation of the present invention, so that those skilled in the art will understand and read the disclosure, and therefore, the present invention is not limited to the conditions and the essential meanings in the technology, and any modifications of the structures, changes of the ratio relationships, or adjustments of the sizes, without affecting the efficacy and the achievable by the present invention, should fall within the scope of the technical disclosure.

Example one

As shown in fig. 1, the input shaft sealing structure of this embodiment, including the input shaft 1, the input shaft 1 connects the bearing seat 3 through two bearings 2, and set up the location bulge loop 33 of two bearings 2 of location in the bearing seat 3, the position that the bearing seat 3 is located the location bulge loop 33 is connected into oil pipe 31, the seal receptacle 4 is connected to bearing seat 3 one end, the position that the bearing seat 3 is located the inboard of seal receptacle 4 is connected first recovery pipeline 32, the first axle sleeve 5 is established to the inboard side cover that is located the seal receptacle 4 of input shaft 1, the second sealing washer is connected to the inboard of first axle sleeve 5, set up the oil blanket 6 between first axle sleeve 5 and the seal receptacle 4, the recovery cover 7 is connected to one side that the seal receptacle 4 keeps away from the bearing seat 3, the second recovery pipeline 71 is connected to the recovery cover 7.

The first recovery pipeline 32 is connected with the bearing seat 3 through a variable joint, and the first recovery pipeline 32 is used for discharging redundant lubricating oil to prevent the excessive pressure at the oil seal 6 from causing a large amount of leakage of the lubricating oil.

The part of the seal seat 4 is penetrated in the bearing seat 3, the seal seat 4 is connected with the bearing seat 3 through a connecting bolt, a first seal ring is arranged between the seal seat 4 and the bearing seat 3, a positioning groove 41 of a positioning oil seal 6 is arranged on the inner side of the seal seat 4, the recovery cover 7 is connected with the seal seat 4 through a connecting bolt, and a yielding through hole 42 of the connecting bolt of the yielding seal seat 4 is formed in the recovery cover 7.

Example two

As shown in fig. 2 and 3, the input shaft sealing structure of the present embodiment differs from the first embodiment in that: the input shaft 1 is located in the inner side portion of the recovery cover 7 and sleeved with a second shaft sleeve 8, the second shaft sleeve 8 is sleeved with a V-shaped end face water seal 9, the input shaft 1 is in threaded connection with a locking nut 10, the V-shaped end face water seal 9 is tightly pressed on the outer end face of the recovery cover 7 through the locking nut 10, the recovery cover 7 has a certain storage volume and is timely returned with a second recovery pipeline 71, lubricating oil can not leak to the external environment theoretically, in case of prevention, the V-shaped end face water seal 9 is added and tightly pressed on the outer end face of the recovery cover 7 through the locking nut 10, lubricating grease is coated between the V-shaped end face water seal 9 and the recovery cover 7 to reduce friction, namely one more protection is formed through the V-shaped end face water seal 9, and the lubricating oil in the recovery cover 7 is prevented from leaking to the external environment.

The second shaft sleeve 8 is sleeved with a gasket 11 at a position between the V-shaped end surface water seal 9 and the lock nut 10, the compression amount between the V-shaped end surface water seal 9 and the end surface of the recovery cover 7 is controlled by adjusting the thickness of the gasket 11, the thickness of the gasket 11 can be reduced when the compression amount is too high, and the thickness of the adjustable gasket 11 can be increased after the V-shaped end surface water seal 9 is worn, so that the compression amount returns to an initial set value, and the period for replacing the V-shaped end surface water seal 9 is shortened.

When the input shaft sealing structure according to the first embodiment and the second embodiment is used, the lubricating oil is fed into the bearing seat 3 from the oil inlet pipeline 31 to lubricate and cool the bearing 2, the redundant lubricating oil enters the space between the bearing 2 and the sealing seat 4, the oil seal 6 plays a sealing role, a certain amount of leakage can be allowed between the oil seal 6 and the first shaft sleeve 5, the leaked lubricating oil is recovered through the recovery cover 7 after passing through the space between the oil seal 6 and the first shaft sleeve 5, the lubricating oil is timely discharged through the second recovery pipeline 71 and flows back to the oil tank, and the redundant lubricating oil flows back to the oil tank from the first recovery pipeline 32 after the oil pressure in the bearing seat 3 is increased.

All possible combinations of the technical features of the above embodiments may not be described for the sake of brevity, but should be considered as being within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several figures and modifications can be made without departing from the inventive concept, and these shall all fall within the scope of protection of the present invention. Therefore, the protection scope of the present patent should be subject to the appended claims.

Claims

1. An input shaft seal structure characterized in that: the input shaft is connected with a bearing seat through a bearing, one end of the bearing seat is connected with a sealing seat, the bearing seat is connected with an oil inlet pipeline and a first recovery pipeline, the input shaft is arranged on the inner side portion of the sealing seat in a sleeved mode and provided with a first shaft sleeve, an oil seal is arranged between the first shaft sleeve and the sealing seat, one side, far away from the bearing seat, of the sealing seat is connected with a recovery cover, and the recovery cover is connected with a second recovery pipeline.

2. The input shaft seal structure according to claim 1, wherein: the bearing seat is connected with the input shaft through two bearings, a positioning convex ring for positioning the two bearings is arranged in the bearing seat, and the oil inlet pipeline is connected between the two bearings.

3. The input shaft seal structure according to claim 1, wherein: the first recovery pipeline is connected with the bearing seat through a variable joint.

4. The input shaft seal structure according to claim 1, wherein: the sealing seat part is penetrated in the bearing seat, and the sealing seat is connected with the bearing seat through a connecting bolt, and a first sealing ring is arranged between the sealing seat and the bearing seat.

5. The input shaft seal structure according to claim 1 or 4, wherein: and a positioning groove for positioning the oil seal is arranged on the inner side of the sealing seat.

6. The input shaft seal structure according to claim 4, wherein: the recovery cover is connected with the sealing seat through a connecting bolt, and the recovery cover is provided with a yielding through hole for the yielding sealing seat connecting bolt.

7. The input shaft seal structure according to claim 1, wherein: and the inner side of the first shaft sleeve is connected with a second sealing ring.

8. The input shaft seal structure according to claim 1, wherein: the input shaft is positioned at the inner side part of the recovery cover and sleeved with a second shaft sleeve.

9. The input shaft seal structure according to claim 8, wherein: the second shaft sleeve is sleeved with a V-shaped end face water seal, the input shaft is in threaded connection with a locking nut, and the V-shaped end face water seal is tightly pressed on the outer end face of the recovery cover through the locking nut.

10. The input shaft seal structure according to claim 9, wherein: and the second shaft sleeve is sleeved with a gasket at a position between the V-shaped end surface water seal and the locking nut.