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Zero-leakage non-friction composite seal for rotating shaft

A composite sealing and non-friction technology, which is applied in the direction of engine sealing, clutch, mechanical drive clutch, etc., can solve the problems of increasing stern shaft torque and power loss, easy leakage of sealing oil of stern shaft tube, pollution of rivers, lakes and sea water, etc. , achieve the effect of reducing maintenance cost, improving work efficiency and reducing failure risk

Pending Publication Date: 2021-07-27
卢星霖
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The sealing oil of the stern tube is easy to leak, causing water pollution in rivers, lakes and seas; the friction between the seal and the stern generates heat, which increases the torque and power loss of the stern. difficulty

Method used

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  • Zero-leakage non-friction composite seal for rotating shaft
  • Zero-leakage non-friction composite seal for rotating shaft
  • Zero-leakage non-friction composite seal for rotating shaft

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] See attached figure 1 , from left to right are centrifugal impeller 201, fixed end plate 105, moving end plate 105', sealing ring seat 200 and baffle plate 106, positioning pin 301 is set between moving end plate 105' and the inner cavity of sealed cabin 1, centrifugal impeller 201 is located in the working chamber 103, wherein the inner ring of the blades of the centrifugal impeller 201 wraps the axially extending outer end of the fixed end plate 105; the baffle plate 106 fixed on the end face of the airtight cabin 1 is a flexible non-metallic material, mainly to intercept the air Dust, during the rotation of the rotating shaft 2, there is slight friction between the baffle plate 106 and the corresponding end surface of the sealing ring seat 200.

[0078] attached figure 1 As shown, at this time, the rotating shaft 2 is rotating, and the centrifugal impeller 201 rotates synchronously to prevent the fluid from entering the inner cavity of the sealed chamber 1. The bloc...

Embodiment 2

[0084] See attached figure 2 , from left to right are the fixed end plate 105, the moving end plate 105′, the sealing ring seat 200, the centrifugal impeller 201, and the end plate 104. The ring wraps around the axially extending outer ends of adjacent end plates 104 .

[0085] attached figure 2 As shown, at this moment, the rotating shaft 2 and the centrifugal impeller 201 stop rotating, and the pressure of the fluid pushes the sealing end surface of the moving end plate 105 ′ to always be in close contact with the sealing end surface of the sealing ring seat 200 .

Embodiment 3

[0087] See attached image 3 , from left to right are the centrifugal impeller 201, the spacer 100, the flywheel clutch (including the shaft sleeve fixed on the rotating shaft 2, the middle ring 202 with a sealing ring platform B202', the ring hammer 202"), the spacer 100, the end plate 104 , wherein the inner ring of the blades of the centrifugal impeller 201 wraps the axially extending outer ends of the adjacent partitions 100 .

[0088] attached image 3 As shown, at this time, the rotating shaft 2 is rotating, and the pressure generated by the synchronous rotation of the centrifugal impeller 201 is greater than the infiltration pressure of the fluid, preventing the fluid from entering the inner cavity of the sealed cabin 1. During the synchronous rotation of the flywheel clutch, at the same time, due to the gravity of the ring hammer 202 " , the sealing end surface of the middle ring 202 is away from the sealing end surface of the spacer 100 .

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Abstract

The invention discloses a zero-leakage non-friction composite seal for a rotating shaft, belongs to pioneering invention in the field of sealing, and mainly relates to two directions of sealing of rotating machinery and sealing of tail shafts of naval vessels and ships. A confrontation type and dredging type mode is adopted to avoid flowing of a medium in the rotating process, and dynamic sealing is achieved; a corrugated pipe clutch and / or a flywheel clutch are / is adopted to cut off the infiltration pressure after the rotating shaft stops rotating, and when the relative pressure difference is larger than or equal to zero, the sealing end face of a movable end plate and the sealing end face of a corresponding sealing ring seat form a sealing pair, and static sealing is achieved; main internal components are free of friction and abrasion, the maintenance cost is eliminated or greatly reduced, the fault risk is reduced, the working efficiency is improved, and the service life is greatly prolonged; and the zero-leakage non-friction composite seal for the rotating shaft is safe and reliable, is shock-proof and shock-absorbing, is wide in application range, and adapts to radial runout of the rotating shaft.

Description

technical field [0001] The zero-leakage non-friction composite seal of the rotating shaft is a pioneering invention in the field of sealing of key mechanical parts. It mainly involves the sealing of rotating machinery and the stern shaft seal of ships. The goal is to gradually replace the existing mechanical seals and stern shaft seals. [0002] The zero-leakage and non-friction composite seal of the rotating shaft of the present invention completely breaks away from the design thinking mode of the existing seal, and adopts confrontation and dredging methods to avoid the flow of the medium during rotation, which is a dynamic seal; bellows clutches and / or flywheels are used The clutch cuts off the infiltration pressure of the rotating shaft after it stops rotating, and forms a sealing pair when the relative pressure difference is greater than or equal to zero, which is a static seal. [0003] The zero-leakage and non-friction composite seal of the rotating shaft of the present ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/34F16J15/42F16J15/40F16J15/16F16D11/16
CPCF16D11/16F16J15/164F16J15/3448F16J15/3464F16J15/40F16J15/42
Inventor 卢星霖
Owner 卢星霖
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