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Friction increasing method for anti-scuffing hydraulic coupling inner sleeve

A hydraulic coupling, anti-scratch technology, applied in the direction of metal material coating process, coating, solid diffusion coating, etc., can solve the problem of not meeting the requirements of light weight, high torque and high performance of ships, galling and strain and other issues, to achieve the effect of light weight, prolong service life, improve friction coefficient and hardness

Active Publication Date: 2017-02-22
无锡鸿海龙船机有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The surface of the inner sleeve of the existing hydraulic coupling is not treated, and the surface of the inner sleeve is prone to roughening, straining, and seizure during installation, that is, the service life is not long, and the friction coefficient between the inner sleeve and the shaft is still taken at 0.14~ 0.15, under the same shape conditions, it has gradually been unable to meet the high performance requirements of light weight and high torque of ships

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  • Friction increasing method for anti-scuffing hydraulic coupling inner sleeve

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Embodiment Construction

[0024] See figure 1 As shown in Fig. 1, a friction-increasing method for the inner sleeve of an anti-scratch hydraulic coupling, the general idea is to form a rough surface on the inner surface of the inner sleeve of the coupling through a sanding process, and then form a nitride layer through a plasma nitriding process, and finally The sharp corner protrusions on the nitride layer are passivated through a spheroidization process.

[0025] Among them, the sandification process specifically includes the following steps:

[0026] (1) First check the appearance of the inner sleeve of the coupling, then clean it with gasoline or cleaning agent, and wrap the outer surface of the inner sleeve of the coupling with a blanket for protection;

[0027] (2) Use a sandblasting machine to perform sandblasting on the inner surface of the coupling inner sleeve to form a rough surface. The sand used is brown corundum sand 16 mesh, and the sandblasting hose is used for sandblasting with a movi...

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Abstract

The invention relates to the technical field of hydraulic couplings, in particular to a friction increasing method for an anti-scuffing hydraulic coupling inner sleeve. Through the friction increasing method, the phenomena of scuffing, straining and blocking of a hydraulic coupling in mounting and dismounting processes can be solved; the service life can be prolonged; a friction coefficient of the inner surface of the inner sleeve can be improved; and high-performance requirements of light weight and large torque can be met. The friction increasing method comprises the following steps: forming a rough surface on the inner surface of a coupling inner sleeve through a grinding process; forming a nitride layer through a plasma nitriding process; and finally, passivating sharp-angled bumps on the nitride layer through a spheroidizing process.

Description

technical field [0001] The invention relates to the technical field of hydraulic couplings, in particular to a method for increasing friction of an inner sleeve of an anti-scratch hydraulic coupling. Background technique [0002] The hydraulic coupling is a common part in the mechanical field. It generally includes the following structures: an outer sleeve, an inner sleeve, a piston and a sealing ring. Set on the outer surface of the same taper of the inner sleeve, the ship engine tightens the tapered surface, and then fills the oil tank between the inner sleeve and the outer sleeve. Since there is a sealing area at both ends of the oil tank, the outer sleeve expands with the increase of oil pressure, and then The piston area is pressurized to move the outer sleeve to the large end of the cone. After reaching the design displacement, the high-pressure oil is released. The outer sleeve presses the inner sleeve tightly, and the inner sleeve presses the drive shaft tightly, and...

Claims

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Application Information

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IPC IPC(8): C23C8/02C23C8/36C23C8/80
CPCC23C8/02C23C8/36C23C8/80
Inventor 于国富庄龙森
Owner 无锡鸿海龙船机有限公司