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Self-pressing stern shaft filler seal

A packing sealing and self-compression technology, applied in the direction of engine sealing, engine components, mechanical equipment, etc., can solve the problems of troublesome operation, heavy workload, and difficulty in truly ensuring the stability and reliability of the sealing performance of the sealing device.

Inactive Publication Date: 2009-08-19
JIANGSU HUAYANG HEAVY IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is not only cumbersome to operate and has a large workload, but also is affected by the human factors of the operator, so it is difficult to truly ensure the stability and reliability of the sealing performance of the sealing device.

Method used

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  • Self-pressing stern shaft filler seal
  • Self-pressing stern shaft filler seal
  • Self-pressing stern shaft filler seal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] exist figure 1 , figure 2 In the shown self-compressing stern shaft packing seal structure, the clamping ring 9 of the split structure is clamped and fixed on the stern shaft 10, and rotates together with the stern shaft 10; the shaft sleeve 8 is tightly sleeved on the stern shaft 10 And it is fixedly connected with the clamp collar 9 by bolts, and an external thread is arranged on the outer cylindrical surface of the axle sleeve 8 . The packing gland 6 adopts a disc-shaped structure, and its center is provided with a threaded hole. The packing gland 6 is screwed to the external thread position of the shaft sleeve 8 through the threaded hole. The threaded hole of the packing gland 6 and the external thread on the shaft sleeve 8 The thread forms the connecting thread 7 . The sealing device body 1 is empty sleeved on the stern shaft 10. The sealing device body 1, the shaft sleeve 8 and the packing gland 6 form a packing cavity, and the packing cavity is filled with sea...

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PUM

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Abstract

The invention discloses a self-press packing seal device of a screw shaft, comprising a seal device body, a shaft sleeve and a packing gland; wherein, sealing packing is filled in a packing cavity surrounded by the shaft sleeve and the packing gland; the packing gland is loaded on the shaft sleeve via a connecting thread; a block device is arranged between the packing gland and the seal device body. The block device in the invention can adopt one-way pawl-ratchet type on-off devices and one-way roller overrunning clutches. The packing seal device of the screw shaft can automatically press the sealing packing, reliably eliminate wearing clearances of the packing in time and has the advantage of stable sealability.

Description

technical field [0001] The invention relates to a ship stern shaft sealing device, in particular to the improvement of the structure of the stern shaft sealing device. Background technique [0002] The stern shaft seal is an indispensable and important part of the ship's propulsion power plant. Although marine stern shaft seals have many different structural types, soft packing stern shaft seals are still widely used because of their simple structure, convenient assembly and disassembly, and low cost. [0003] The stern shaft packing seal is usually composed of the stern shaft sleeve, the sealing gland of the sealing device body and the sealing cavity surrounded by filling appropriate soft packing; the sealing gland compresses the soft packing axially to make it produce radial Elastic-plastic deformation to fill the gap to play a sealing role. After the sliding surface packing is worn, the gland bolts must be tightened in time to restore the sealing performance. [0004] S...

Claims

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Application Information

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IPC IPC(8): F16J15/18
Inventor 丁郁华
Owner JIANGSU HUAYANG HEAVY IND
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