Vehicle high-pressure power steering rubber tube and preparation method thereof

A power steering and rubber hose technology, applied in chemical instruments and methods, hoses, pipes, etc., can solve the problems of soaring prices, shortage of CSM rubber, constraints, etc., and achieve the effect of improving adhesion

Inactive Publication Date: 2011-01-26
TIANJIN PENGYI GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The rubber material generally used for high-pressure power steering hoses is chlorosulfonated polyethylene rubber (hereinafter referred to as CSM), and the specific structure is five layers: the inner layer, the middle layer and the outer layer are all CSM rubber, the inner rubber and the middle rubber, and the outer rubber. Nylon is used as a reinforcing layer between the rubber and the middle rubber, because in the hydraulic power steering system, the liquid inside the hose is hydraulic oil. Due to its own structural characteristics, CSM rubber has excellent hydraulic oil resistance. With the development of automobiles, hydraulic power steering systems are also constantly being upgraded. The temperature resistance of CSM rubber can only reach 125°C. In some high-end cars, it can no longer meet the high temperature requirements of 150°C. DuPont, the largest manufacturer of rubber in the United States, has stopped production, resulting in a shortage of CSM rubber, and the price has soared all the way. Under multiple pressures, the use of CSM rubber has been severely restricted, and other rubber materials have to be used instead of CSM rubber. Guarantee better performance, therefore, we have studied a new type of high-pressure power steering hose, which can not only meet the current high temperature and high burst pressure requirements, but also reduce the cost

Method used

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  • Vehicle high-pressure power steering rubber tube and preparation method thereof
  • Vehicle high-pressure power steering rubber tube and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A five-layer circular power steering hose configured for automotive power steering is a power steering hose with ECO rubber as the inner layer for conveying media. From the inside to the outside: one layer is the inner layer of ECO rubber 1 , The second layer is a mesh nylon reinforcement layer 2, the third layer is an NBR film wrapped middle layer 3, the fourth layer is a mesh nylon reinforcement layer 4, and the fifth layer is an AEM rubber outer layer 5. The thickness is 2mm for the inner layer of ECO rubber, 0.5mm for the mesh nylon layer, 0.5mm for the middle layer of NBR, 0.5mm for the mesh nylon layer, 2mm for the outer layer of AEM, and the hole diameter of the inner layer of the hose is 9.8mm.

[0021] The specific production process is as follows:

[0022] 1) The extrusion temperature of the inner layer is: head 95°C, extrusion section 85°C, plasticizing section 85°C, feeding section 65°C, screw section 60°C, and the extrusion thickness is 4mm;

[0023] 2) Th...

Embodiment 2

[0033] Such as figure 1 As shown, it is a 5-layer circular power steering hose configured for automobile power steering gear. It is a power steering hose with ECO rubber as the inner layer for conveying medium. Layer 1 and the second layer are mesh nylon reinforcement layer 2, the third layer is NBR film wrapping middle layer 3, the fourth layer is mesh nylon reinforcement layer 4, and the fifth layer is AEM rubber outer layer 5. The thickness is 2mm for the inner layer of ECO, 0.5mm for the mesh nylon layer, 0.5mm for the middle layer of NER, 0.5mm for the mesh nylon layer, 2mm for the outer layer of AEM, and the aperture of the inner layer of the hose is 9.8mm.

[0034] Concrete production process is according to embodiment 1, difference is as follows:

[0035] 1) The extrusion temperature of the inner layer is: head 80°C, extrusion section 65°C, plasticizing section 65°C, feeding section 45°C, screw section 40°C, and the extrusion thickness is 2mm;

[0036] 2) The extrusi...

Embodiment 3

[0039] Such as figure 1 As shown, it is a five-layer circular power steering rubber hose configured for automobile power steering gear. It is a power steering hose with ECO as the inner layer for conveying medium. From the inside to the outside, it is as follows: one layer is ECO rubber The inner layer 1, the second layer is a mesh nylon reinforcement layer 2, the third layer is an NBR middle layer 3, the fourth layer is a mesh nylon reinforcement layer 4, and the fifth layer is an AEM rubber outer layer 5. The thickness is 2mm for the inner layer of ECO, 0.5mm for the mesh nylon layer, 0.5mm for the middle layer of NBR, 0.5mm for the mesh nylon layer, 2mm for the outer layer of AEM rubber, and the hole diameter of the inner layer of the hose is 9.8mm.

[0040] Concrete production process is according to embodiment 1, difference is as follows:

[0041] 1) The extrusion temperature of the inner layer is: head 90°C, extrusion section 80°C, plasticizing section 80°C, feeding sec...

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Abstract

The invention relates to a vehicle high-pressure power steering rubber tube and a preparation method thereof. The rubber pipe is specifically in a five-layer structure, wherein the inner layer is ECO (Epichlorohydrin) or AEM (Alpha-Ethyl Mescaline) rubber with the thickness of 0.5-4 mm; the middle layer is NBR (Nitrile-Butadiene Rubber) with the thickness of 0.1-2 mm; the outer layer is AEM rubber with the thickness of 0.2-3mm; and nylon between the inner layer and the middle layer and between the outer layer and the middle layer is used as a reinforcing layer. The invention can ensure that the rubber pipe can reach the burst pressure of above 54 MPa, the inner rubber can resist hydraulic oil by adopting ECO or AEM, the outer rubber can resist the high temperature of 150 DEG C by adopting AEM, and the mode of water-coated distributed vulcanization is adopted, thereby the adhesive force exceeding 2.5 N / mm of the standard requirement is greatly increased; and the appearance is beautiful and regular cloth marks so that the rubber pipe can not have the phenomenon of ugly line ridges. The rubber pipe is subjected to a pulse test after being buckled so that the rubber pipe is not broken at 225000 times under the conditions that the pressure is 0-10.3 MPa, the inside and the outside temperatures are 135 DEG C, and the inner part of the rubber pipe is filled with circulated hydraulic oil.

Description

technical field [0001] The invention relates to the technical field of automobile rubber hoses, in particular to a high-pressure power steering rubber hose for vehicles and a preparation method thereof. Background technique [0002] With the development of automobile technology, the traditional automobile steering system, the mechanical steering system, can no longer meet people's requirements on automobile handling performance and portability, and gradually derives the hydraulic power steering system, which has the characteristics of working without noise, High sensitivity and small size can absorb the impact from uneven roads, and are widely used in modern cars. The power steering tube is also widely used as an important part. Due to the high working pressure of this product, the bursting pressure of the product needs to be above 54Mpa, and the adhesion strength between the two layers of braided wires must be greater than 2.5N / mm. [0003] The rubber material generally u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L11/08B32B1/08B32B25/08B29C47/92B29C48/92
CPCB29C48/9185B29C48/06
Inventor 张洪起薛俊芳
Owner TIANJIN PENGYI GRP CO LTD
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