CN213871099U

CN213871099U - Rotary seal for propeller input shaft

Info

Publication number: CN213871099U
Application number: CN202022883252.7U
Authority: CN
Inventors: 熊秋慧; 刘占伟; 张燕
Original assignee: Shanghai Beihao Shipbuilding Technology Co ltd
Current assignee: Shanghai Beihao Shipbuilding Technology Co ltd
Priority date: 2020-12-03
Filing date: 2020-12-03
Publication date: 2021-08-03
Anticipated expiration: 2030-12-03

Abstract

The utility model discloses a propeller input shaft rotary seal, the input shaft axle sleeve is fixedly connected with through lock nut on the global of input shaft, the surface of input shaft axle sleeve installs rotatory sealed one and rotatory sealed two respectively, the outer lane of rotatory sealed one is installed in the inside of input shaft seal receptacle one, the outer lane of rotatory sealed two is installed in the inside of input shaft seal receptacle two, the top of input shaft seal receptacle two is opened has the oilhole, and is equipped with the lubricating oil union coupling at the top of input shaft seal receptacle two, the lubricating oil union coupling is fixed to be assembled on the oilhole of input shaft seal receptacle two, the afterbody of input shaft axle sleeve is equipped with the oil slinger, and in the course of the work, through the oil slinger in front of the input shaft axle sleeve, throw away most injected lubricating oil, reduce the direct impact of lubricating oil to input shaft rotary seal one and rotatory sealed two, the input shaft sleeve is directly in sealing contact with the first rotary seal and the second rotary seal, and the sealing reliability is improved.

Description

Rotary seal for propeller input shaft

Technical Field

The utility model belongs to the technical field of rotary sealing; in particular to a novel input shaft rotary sealing device.

Background

With the demand of China on ocean development, a large number of full-rotation propellers are applied to various ships, the full-rotation propellers provide forward and backward power for the ships, and the performance of the full-rotation propellers determines the overall performance of the ships, such as safety, stability, reliability and the like. The overall performance of the full-circle-turning propeller is more and more emphasized. The most common maintenance problem of the marine propeller is the problem of oil leakage of the rotary seal, which not only wastes oil but also causes pollution to the environment and the like, thereby bringing about a plurality of problems. According to the technical scheme, a novel input shaft rotary seal is further developed on the basis of a traditional rotary seal structure, and the novel input shaft rotary seal is safe, reliable, economical and practical.

The input shaft rotary seal is used as a main component of the propeller and plays a role in preventing the leakage of the input shaft lubricating oil. The oil slinger on the right side of the lower end of the lubricating oil input port can throw out most of injected lubricating oil to prevent direct impact on the rotary seal, an oil way is drilled on the bearing seat of the input shaft to lead out the lubricating oil beside the first rotary seal, two sets of input shaft rotary seals are arranged at the rear end of the oil slinger, and when the first set of rotary seal leaks, the latter set of input shaft rotary seal is used as a protection to reduce the risk of lubricating oil leakage. Because the input shaft has higher rotating speed, the shaft sleeve provided with the rotary seal is also specially processed, and has the particularity that: the shaft sleeve structure is provided with a special groove in the middle, and the shaft sleeve structure is processed after hot spraying of materials, so that the wear resistance is improved, the surface smoothness of the shaft sleeve is improved, and the loss of the rotary seal in the operation process is reduced.

Among the current propeller input shaft rotary seal, mostly be one set of input shaft rotary seal, when rotary seal took place to leak, the lubricating oil can constantly reduce in the use, increases the oil consumption, need shut down and overhaul, and this can cause the inconvenience of maintenance. The propeller is applied, so that a set of input shaft rotary seal brings great potential safety hazard to the whole set of propulsion system, the safety and the stability of the propeller are greatly reduced, and the maintenance cost is increased.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a novel input shaft rotary seal device to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

a propeller input shaft rotary seal comprises an input shaft, wherein an input shaft sleeve is fixedly connected to the circumferential surface of the input shaft through a locking nut, a rotary seal I and a rotary seal II are respectively installed on the outer surface of the input shaft sleeve, the outer ring of the rotary seal I is installed inside an input shaft seal seat I, the outer ring of the rotary seal II is installed inside an input shaft seal seat II, an oil hole is formed in the top end of the input shaft seal seat II, a lubricating oil pipe joint is assembled at the top of the input shaft seal seat II, the lubricating oil pipe joint is fixedly assembled on the oil hole of the input shaft seal seat II, an oil slinger is assembled at the tail of the input shaft sleeve, the input shaft seal seat II is installed on the end surface of the input shaft bearing seat I, an oil conveying hole is formed in the bottom end of the input shaft bearing seat I, and the input shaft bearing seat I is fixedly installed on the end surface of the input shaft bearing seat II, the bottom end of the input shaft bearing seat II is also provided with an oil transmission hole, and the input shaft bearing seat II is installed on the gearbox shell.

As a further aspect of the present invention: and the other oil slinger is arranged at the right position of the bottom end of the lubricating oil pipe joint.

As a further aspect of the present invention: oil injection holes are formed in the top surfaces of the input shaft bearing seat I and the input shaft bearing seat II.

As a further aspect of the present invention: an oil return hole is formed in the bottom end of the first input shaft sealing seat, an oil conveying pipeline is connected to the oil return hole of the first input shaft sealing seat, and the other end of the oil conveying pipeline extends to the inside of a gearbox shell.

The utility model has the advantages that:

1. the utility model discloses a most injected lubricating oil is thrown away to the oil slinger in front of the input shaft axle sleeve, reduces the direct impact of lubricating oil to rotary seal one and rotary seal two on the input shaft, and the input shaft axle sleeve directly contacts with rotary seal one and rotary seal two in a sealing way, increases the reliability of sealing, and rotary seal one and rotary seal two front ends all communicate with oil return line, draw lubricating oil, prevent effectively that rotary seal internal pressure is too big and increase the risk of leaking;

2. the utility model discloses an add oil slinger and rotary seal one and rotary seal two, and then increased sealed reliability, avoid one set of sealed inefficacy, cause the shut down of whole propeller.

Drawings

In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.

Fig. 1 is a schematic front view of a propeller input shaft rotary seal.

Fig. 2 is an enlarged view of a portion a in fig. 1.

Fig. 3 is a schematic structural diagram of a rotary seal one in the rotary seal of the propeller input shaft.

In the figure: 1. an input shaft; 2. locking the nut; 3. an input shaft sleeve; 4. rotating and sealing one; 5. a first input shaft seal seat; 6. rotating the second seal; 7. a lubricating oil pipe joint; 8. a second input shaft seal seat; 9. an oil slinger; 10. a first input shaft bearing seat; 11. a second input shaft bearing seat; 12. a gearbox housing; 13. an oil pipeline.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Please refer to fig. 1-3, in an embodiment of the present invention, a propeller input shaft rotary seal includes an input shaft 1, an input shaft sleeve 3 is fixedly connected to the input shaft 1 through a lock nut 2, a first rotary seal 4 and a second rotary seal 6 are respectively installed on the outer surface of the input shaft sleeve 3, an outer ring of the first rotary seal 4 is installed inside a first input shaft seal seat 5, an outer ring of the second rotary seal 6 is installed inside a second input shaft seal seat 8, and by additionally installing the first rotary seal 4 and the second rotary seal 6, the reliability of the seal is further increased, thereby avoiding a set of seal failure and causing the shutdown of the whole propeller.

The top end of the input shaft seal seat II 8 is provided with an oil hole, the top of the input shaft seal seat II 8 is provided with a lubricating oil pipe joint 7, the lubricating oil pipe joint 7 is fixedly assembled on the oil hole of the input shaft seal seat II 8, the tail part of the input shaft sleeve 3 is provided with an oil slinger 9, most of injected lubricating oil is thrown out through the oil slinger 9 in front of the input shaft sleeve 3, and direct impact of the lubricating oil on the input shaft rotary seal I4 and the input shaft rotary seal II 6 is reduced.

The second input shaft sealing seat 8 is installed on the end face of the first input shaft bearing seat 10, an oil transmission hole is formed in the bottom end of the first input shaft bearing seat 10, the first input shaft bearing seat 10 is fixedly installed on the end face of the second input shaft bearing seat 11, an oil transmission hole is also formed in the bottom end of the second input shaft bearing seat 11, and the second input shaft bearing seat 11 is installed on the gearbox shell 12.

And the right side position of the bottom end of the lubricating oil pipe joint 7 is provided with another oil slinger 9.

Oil holes are formed in the top surfaces of the first input shaft bearing seat 10 and the second input shaft bearing seat 11.

An oil return hole is formed in the bottom end of the input shaft sealing seat I5, an oil conveying pipeline 13 is connected to the oil return hole of the input shaft sealing seat I5, and the other end of the oil conveying pipeline 13 extends into the gear box shell 12.

The working principle is as follows: when lubricating oil is injected from the lubricating oil pipe joint 7, the oil slinger 9 slings most of the lubricating oil when the input shaft sleeve 3 rotates at a high speed, part of the lubricating oil flowing to the input shaft rotary seal II 6 is led out to the inside of the gear box shell 12 through the oil injection holes in the input shaft bearing seat I10 and the input shaft bearing seat II 11, if the rotary seal II 6 leaks, the leaked lubricating oil can flow between the rotary seal II 6 and the rotary seal I4 and is discharged into the gear box shell 12 through the oil conveying pipeline 13, the pressure of the rotary seal I4 cannot be too high due to continuous leakage, meanwhile, the rotary seal I4 continuously plays a role in rotary sealing, the sealing failure of the whole propeller cannot be caused due to the leakage of the rotary seal II 6, the sealing effect is good, and the safety is high.

The foregoing is merely exemplary and illustrative of the structure of the invention, and various modifications, additions and substitutions as described in the detailed description may be made by those skilled in the art without departing from the structure or exceeding the scope of the invention as defined in the claims.

Claims

1. A propeller input shaft rotary seal comprises an input shaft (1) and is characterized in that an input shaft sleeve (3) is fixedly connected to the circumferential surface of the input shaft (1) through a lock nut (2), a first rotary seal (4) and a second rotary seal (6) are respectively installed on the outer surface of the input shaft sleeve (3), the outer ring of the first rotary seal (4) is installed inside a first input shaft seal seat (5), the outer ring of the second rotary seal (6) is installed inside a second input shaft seal seat (8), an oil hole is formed in the top end of the second input shaft seal seat (8), a lubricating oil pipe joint (7) is assembled at the top of the second input shaft seal seat (8), the lubricating oil pipe joint (7) is fixedly assembled on the oil hole of the second input shaft seal seat (8), and an oil slinger (9) is assembled at the tail part of the input shaft sleeve (3), the input shaft sealing seat II (8) is installed on the end face of the input shaft bearing seat I (10), an oil transmission hole is formed in the bottom end of the input shaft bearing seat I (10), the input shaft bearing seat I (10) is fixedly installed on the end face of the input shaft bearing seat II (11), the oil transmission hole is also formed in the bottom end of the input shaft bearing seat II (11), and the input shaft bearing seat II (11) is installed on the gear box shell (12).

2. A propeller input shaft rotary seal in accordance with claim 1, characterized in that the bottom end right side position of the lubricating oil pipe joint (7) is fitted with another oil slinger (9).

3. The propeller input shaft rotary seal of claim 1, wherein oil holes are formed in the top surfaces of the input shaft bearing seat I (10) and the input shaft bearing seat II (11).

4. The propeller input shaft rotary seal according to claim 1, wherein an oil return hole is formed in the bottom end of the input shaft seal seat I (5), an oil delivery pipeline (13) is connected to the oil return hole of the input shaft seal seat I (5), and the other end of the oil delivery pipeline (13) extends into the gearbox shell (12).

5. The propeller input shaft rotary seal of claim 1, wherein the rotary seal I (4) and the rotary seal II (6) have the same structure and are of annular structures, and annular grooves for the sealing rings are formed on the inner side surfaces of the rotary seal I (4) and the rotary seal II (6).