CN220743332U

CN220743332U - Water spraying propeller

Info

Publication number: CN220743332U
Application number: CN202322303361.0U
Authority: CN
Inventors: 仉永超; 王见东; 韩宝玉; 吴本坤; 李广辉; 武璇
Original assignee: Weichai Heavy Machinery Co Ltd
Current assignee: Weichai Heavy Machinery Co Ltd
Priority date: 2023-08-25
Filing date: 2023-08-25
Publication date: 2024-04-09
Anticipated expiration: 2033-08-25

Abstract

The utility model discloses a water-jet propeller, which relates to the technical field of ship propulsion and comprises a shell and an impeller shaft provided with an impeller, wherein the shell is provided with a water suction pipe, a water outlet and a shaft pipe which are communicated with an inner cavity of the shell, and the end part of the shaft pipe is provided with a first bearing seat; the impeller shaft is located the casing, and the one end rotation of impeller shaft sets up in the rectification seat in the casing, and the other end of impeller shaft passes the central siphon and sets up in first bearing frame, is provided with two sets of skeleton oil blanket subassemblies that install opposite direction in the central siphon, and the skeleton oil blanket of two sets of skeleton oil blanket subassemblies is all tightly hooped on the surface of impeller shaft, and wherein a set of skeleton oil blanket subassembly is used for preventing the lubricating oil in the first bearing frame from flowing into in the casing, and another set of skeleton oil blanket subassembly is used for preventing the water in the casing from flowing into in the first bearing frame. The water-jet propeller disclosed by the utility model can ensure the sealing effect, can effectively avoid sealing failure caused by dry grinding, and greatly reduces the test difficulty and the test cost.

Description

Water spraying propeller

Technical Field

The utility model relates to the technical field of ship propulsion, in particular to a water spraying propeller.

Background

The water jet propeller is a propeller which is used for driving a ship to advance by utilizing the reaction force generated by water jet when the jet part of the propelling mechanism is immersed in water. After the ship equipped with the water jet propeller is launched, the water suction pipe of the water jet propeller has the same free liquid level as the ship draft, so as to prevent water flow from flowing backward into the ship cabin through the water suction pipe, and meanwhile, in order to prevent lubricating oil in the water jet propeller from entering into the water, the water jet propeller usually adopts a mechanical seal to realize the sealing of the lubricating oil and the water of the shafting.

However, most of the moving ring sealing components of the mechanical seal are made of graphite materials, dry grinding is not allowed, water is necessary to lubricate and cool, and if the water jet propeller works accidentally in a water shortage state, the mechanical seal can be rapidly worn and broken, so that the seal is invalid. The test of the water jet propeller cannot be carried out by a conventional method, a test pool and corresponding test equipment are added during the test, and the test difficulty and the test cost are increased due to the high requirements on the test equipment.

Disclosure of Invention

Aiming at the defects existing in the prior art, the utility model provides the water spraying propeller, which not only can ensure the sealing effect, but also can effectively avoid the sealing failure caused by dry grinding, thereby greatly reducing the test difficulty and the test cost.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the water spraying propeller comprises a shell and an impeller shaft provided with an impeller, wherein the shell is provided with a water suction pipe, a water outlet and a shaft pipe which are communicated with the inner cavity of the shell, and the end part of the shaft pipe is provided with a first bearing seat; the impeller shaft is positioned in the shell, one end of the impeller shaft is rotatably arranged in the rectifying seat in the shell, the other end of the impeller shaft penetrates through the shaft tube and is arranged in the first bearing seat, two groups of framework oil seal assemblies with opposite installation directions are arranged in the shaft tube, framework oil seals of the two framework oil seal assemblies are tightly hooped on the surface of the impeller shaft, one group of framework oil seal assemblies is used for preventing lubricating oil in the first bearing seat from flowing into the shell, and the other group of framework oil seal assemblies is used for preventing water in the shell from flowing into the first bearing seat.

Wherein, two skeleton oil blanket subassembly all includes two the skeleton oil blanket, two the skeleton oil blanket all takes self-tightening spring and two the installation direction of skeleton oil blanket is unanimous.

The impeller shaft comprises a rotating main shaft and a wear-resistant bushing fixedly sleeved on the rotating main shaft, the rotating main shaft is rotatably arranged in the rectifying seat and the first bearing seat, and both framework oil seals of the framework oil seal assembly are tightly hooped on the surface of the wear-resistant bushing.

And a sealing structure is arranged between the wear-resistant bushing and the rotary main shaft.

The sealing structure comprises a sealing groove surrounded by the rotary main shaft and the wear-resistant lining, and a sealing ring arranged in the sealing groove.

And the elastic check ring is arranged on the shaft tube, and the two skeleton oil seal assemblies are axially limited between the first bearing seat and the elastic check ring.

The first bearing seat comprises a seat body and a gland which jointly enclose an installation space, and a thrust bearing arranged in the installation space, and the impeller shaft is arranged in the thrust bearing; the gland end of the first bearing seat is arranged on the shaft tube, and the two framework oil seal assemblies are axially limited between the gland and the elastic retainer ring.

The impeller shaft extends out of the first bearing seat and is connected with a driving flange used for being connected with a driving device.

Wherein, be provided with the second bearing in the rectification seat, the impeller axle sets up in the second bearing.

The shaft sleeve is arranged between the second bearing and the impeller shaft, a limiting step is arranged on the impeller shaft, the end part of the impeller shaft is connected with a shaft end check ring, and the shaft sleeve is sleeved on the impeller shaft and is positioned between the limiting step and the shaft end check ring.

By adopting the technical scheme, the utility model has the beneficial effects that:

according to the water-jet propeller provided by the utility model, two groups of framework oil seal assemblies with opposite installation directions are adopted to replace mechanical seals, wherein one group of framework oil seal assemblies is used for preventing lubricating oil in a first bearing seat from flowing into a shell, the other group of framework oil seal assemblies is used for preventing water in the shell from flowing into the first bearing seat, as the framework of the framework oil seal in the framework oil seal assemblies can improve the supporting strength, the oil seal body of the framework oil seal is made of rubber, the wear resistance of the rubber is far higher than that of graphite, and the rubber can be allowed to be dry-ground in a non-lubrication state for a long time, therefore, compared with the prior art, the water-jet propeller can ensure the sealing effect, effectively avoid sealing failure caused by dry grinding, and greatly reduce the test difficulty and the test cost; and, because the simple structure of skeleton oil blanket, simple to operate, the price of skeleton oil blanket is also less than mechanical seal, consequently, compared with prior art, improved assembly efficiency effectively, reduced manufacturing cost.

Drawings

FIG. 1 is a schematic view of the structure of a water jet propeller of the present utility model;

in the figure: 1. a housing; 11. a first housing; 111. a water outlet; 12. a second housing; 2. an impeller shaft; 21. rotating the main shaft; 22. wear-resistant bushings; 3. an impeller; 4. a water suction pipe; 5. a shaft tube; 6. a first bearing seat; 61. a base; 62. a gland; 63. a thrust bearing; 7. a rectifying seat; 8. a skeleton oil seal assembly; 81. a framework oil seal; 9. a seal ring; 10. a circlip; 13. a second bearing seat; 14. a shaft sleeve; 15. a shaft end retainer ring; 16. a driving flange; 17. a turning nozzle; 18. an access opening; 19. an end cap.

Detailed Description

For the purpose of making apparent the objects, technical solutions and advantages of the present utility model, the present utility model will be further described in detail with reference to the accompanying drawings and examples, it being understood that the specific examples described herein are for the purpose of illustration only and are not intended to limit the present utility model.

As shown in fig. 1, the water jet propeller comprises a shell 1 and an impeller shaft 2 provided with an impeller 3, wherein a water suction pipe 4, a water outlet 111 and a shaft pipe 5 which are communicated with the inner cavity of the shell 1 are arranged on the shell 1, and a first bearing seat 6 is arranged at the end part of the shaft pipe 5; the impeller shaft 2 is located in the shell 1, one end of the impeller shaft 2 is rotatably arranged in the rectifying seat 7 in the shell 1, the other end of the impeller shaft 2 passes through the shaft tube 5 and is arranged in the first bearing seat 6, two groups of framework oil seal assemblies 8 with opposite installation directions are arranged in the shaft tube 5, framework oil seals 81 of the two groups of framework oil seal assemblies 8 are tightly hooped on the surface of the impeller shaft 2, one group of framework oil seal assemblies 8 are used for preventing lubricating oil in the first bearing seat 6 from flowing into the shell 1, and the other group of framework oil seal assemblies 8 are used for preventing lubricating oil in the shell 1 from flowing into the first bearing seat 6.

The water jet propeller in the embodiment adopts two groups of framework oil seal assemblies 8 with opposite installation directions to replace mechanical seal, wherein one group of framework oil seal assemblies 8 is used for preventing lubricating oil in the first bearing seat 6 from flowing into the shell 1, the other group of framework oil seal assemblies 8 is used for preventing lubricating oil in the shell 1 from flowing into the first bearing seat 6, the framework of the framework oil seal 81 in the framework oil seal assemblies 8 can improve the supporting strength, and the oil seal body of the framework oil seal 81 is made of rubber, so that the wear resistance of the rubber is far higher than that of graphite, and the rubber can be allowed to be dry-ground in a non-lubrication state for a long time; in addition, because the framework oil seal 81 has a simple structure and is convenient to install, the price of the framework oil seal 81 is lower than that of a mechanical seal, so that the assembly efficiency of the water jet propeller is effectively improved, and the production cost is reduced.

As shown in fig. 1, two sets of skeleton oil seal assemblies 8 in this embodiment each include two skeleton oil seals 81, the two skeleton oil seals 81 each have a self-tightening spring, and the installation directions of the two skeleton oil seals 81 are identical. Thus, the two groups of framework oil seal assemblies 8 form four sealing barriers, and even if one framework oil seal 81 fails, the sealing effect can be ensured, and the sealing performance is stronger. In practical applications, the number of skeleton seals 81 in each group of skeleton seal assemblies 8 may be installed according to practical requirements, which is not limited in this embodiment.

As shown in fig. 1, the impeller shaft 2 in the present embodiment includes a rotary main shaft 21 and a wear-resistant bush 22 fixedly sleeved on the rotary main shaft 21 by a set screw, the rotary main shaft 21 is rotatably disposed in the rectifying seat 7 and the first bearing seat 6, and the skeleton oil seals 81 of the two groups of skeleton oil seal assemblies 8 are tightly hooped on the surface of the wear-resistant bush 22. By providing the wear-resistant bushing 22, the degree of wear of the rotary main shaft 21 can be effectively reduced, and the number of times of replacement of the rotary main shaft 21 can be reduced, thereby reducing the downtime and the production cost.

In order to further improve the sealing effect, the present embodiment provides a sealing structure between the wear-resistant bushing 22 and the rotary main shaft 21.

Specifically, the seal structure includes a seal groove surrounded by the rotary main shaft 21 and the wear-resistant bush 22, and a seal ring 9 provided in the seal groove.

The O-ring has good sealing effect and has the advantages of oil resistance, acid and alkali resistance, wear resistance, chemical corrosion resistance and the like, so the O-ring is preferably an O-ring, and of course, other structural forms of the O-ring can be selected, which is not limited in this embodiment.

As shown in fig. 1, in order to facilitate assembly, the present embodiment provides the housing 1 as a split structure, including a first housing 11 and a second housing 12 connected together, a drain port 111 is provided on the first housing 11, and the water suction pipe 4 and the shaft pipe 5 are both provided on the second housing 12 and integrally provided with the second housing 12.

The elastic check ring 10 is installed on the shaft tube 5, and the two groups of framework oil seal assemblies 8 are axially limited between the first bearing seat 6 and the elastic check ring 10.

Specifically, the first bearing housing 6 includes a housing 61 and a gland 62 that together enclose an installation space, and a thrust bearing 63 provided in the installation space, the rotation main shaft 21 of the impeller shaft 2 being provided in the thrust bearing 63; the gland end of the first bearing seat 6 is arranged on the shaft tube 5, and the two groups of framework oil seal assemblies 8 are axially limited between the gland 62 and the circlip 10.

As shown in fig. 1, in order to better support the impeller shaft 2, reduce the friction coefficient of the impeller shaft 2 during movement and ensure the rotation precision of the impeller shaft 2, the embodiment is provided with a second bearing seat 13 in the rectifying seat, which is compact in structure, sensitive in rotation and convenient in maintenance, and the impeller shaft 2 is arranged in the second bearing seat 13.

Specifically, the rectifying seat 7 is fixedly arranged on the first housing 11 through a supporting rib, a mounting cavity is arranged on the rectifying seat 7, the second bearing seat 13 is arranged in the mounting cavity, and in order to prevent the lubricating oil in the second bearing seat 13 from leaking, the second bearing seat 13 is preferably provided with an oil seal structure in the embodiment.

As shown in fig. 1, in this embodiment, a shaft sleeve 14 is disposed between the second bearing 13 and a rotating main shaft 21 of the impeller shaft 2, a limiting step is disposed on the rotating main shaft 21, an end portion of the rotating main shaft 21 is connected with a shaft end retainer 15, and the shaft sleeve 14 is sleeved on the rotating main shaft 21 and is located between the limiting step and the shaft end retainer 15. By providing the shaft sleeve 14, the degree of wear of the rotary main shaft 21 can be effectively reduced, and the number of times of replacement of the rotary main shaft 21 can be reduced, thereby reducing the downtime and the production cost.

In order to facilitate connection with a drive device (not shown in the figures), the main rotating shaft 21 of the impeller shaft 2 in this embodiment extends from the first bearing seat 6 and is connected with a drive flange 16 for connection with the drive device.

In order to facilitate the steering of the water jet propeller, the present embodiment provides a steering nozzle 17 on the water discharge opening 111.

For easy maintenance, the present embodiment provides an access port 18 communicating with the inner cavity of the housing 1 on the housing 1, and provides an end cap 19 on the access port 18.

Specifically, the access opening 18 is provided on the second housing 12, and the access opening 18 and the suction pipe 4 are respectively located at the upper and lower sides of the shaft pipe 5.

The above is only a preferred embodiment of the water jet propulsion device of the present utility model, and further embodiments are not described herein.

In summary, the water-jet propeller replaces mechanical sealing by two groups of framework oil seal assemblies 8 with opposite installation directions, so that not only can the sealing effect be ensured, but also the sealing failure caused by dry grinding can be effectively avoided, and the test difficulty and the test cost are greatly reduced; and the assembly efficiency of the water spraying propeller is effectively improved, and the production cost is reduced.

The present utility model is not limited to the above-described specific embodiments, and various modifications made by those skilled in the art without inventive efforts from the above-described concept are within the scope of the present utility model.

Claims

1. The water spraying propeller comprises a shell and an impeller shaft provided with an impeller, wherein the shell is provided with a water suction pipe, a water outlet and a shaft pipe which are communicated with the inner cavity of the shell, and the end part of the shaft pipe is provided with a first bearing seat; the impeller shaft is positioned in the shell, one end of the impeller shaft is rotatably arranged in the rectifying seat in the shell, the other end of the impeller shaft passes through the shaft tube and is arranged in the first bearing seat, and the impeller shaft is characterized in that,

two groups of framework oil seal assemblies with opposite installation directions are arranged in the shaft tube, and framework oil seals of the two framework oil seal assemblies are tightly hooped on the surface of the impeller shaft, wherein one group of framework oil seal assemblies are used for preventing lubricating oil in the first bearing seat from flowing into the shell, and the other group of framework oil seal assemblies are used for preventing water in the shell from flowing into the first bearing seat.

2. The water jet propeller of claim 1, wherein both of the frame oil seal assemblies comprise two of the frame oil seals, both of the frame oil seals have self-tightening springs and the installation directions of the two frame oil seals are identical.

3. The water jet propeller of claim 1, wherein the impeller shaft comprises a rotating main shaft and a wear-resistant bushing fixedly sleeved on the rotating main shaft, the rotating main shaft is rotatably arranged in the rectifying seat and the first bearing seat, and the framework oil seals of the two framework oil seal assemblies are tightly hooped on the surfaces of the wear-resistant bushing.

4. A water jet propeller as claimed in claim 3, wherein a seal is provided between the wear bushing and the rotating spindle.

5. The water jet propeller of claim 4, wherein the seal structure comprises a seal groove surrounded by the rotating main shaft and the wear bushing, and a seal ring disposed within the seal groove.

6. The water jet propeller of claim 1, wherein a circlip is mounted on the shaft tube, and two of the skeletal oil seal assemblies are axially limited between the first bearing seat and the circlip.

7. The water jet propeller of claim 6, wherein the first bearing housing comprises a housing body and a gland that together enclose a mounting space, and a thrust bearing disposed within the mounting space, the impeller shaft disposed within the thrust bearing; the gland end of the first bearing seat is arranged on the shaft tube, and the two framework oil seal assemblies are axially limited between the gland and the elastic retainer ring.

8. The water jet propeller of claim 7, wherein the impeller shaft extends from the first bearing housing and is connected to a drive flange for connection to a drive means.

9. The water jet propeller of claim 1, wherein a second bearing seat is disposed within the rectifying seat, and the impeller shaft is disposed within the second bearing seat.

10. The water jet propeller of claim 9, wherein a shaft sleeve is arranged between the second bearing and the impeller shaft, a limiting step is arranged on the impeller shaft, the end part of the impeller shaft is connected with a shaft end retainer ring, and the shaft sleeve is sleeved on the impeller shaft and is positioned between the limiting step and the shaft end retainer ring.