the structure and performance of hydraulic hose connector assembly

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1, hose

Hydraulic hose from the inner layer and enhance layer and outer layer (Figure 7),

the inner layer directly in contact with oil called for in the long-term condition

should not corrosion by the fluid can leak. Enhance the layer effect can withstand a

certain pressure. Therefore, the appropriate use nitrile rubber, in addition to hydraulic adapter fittings

rubber, the main factors affecting the performance of the inner layer hardness,

thickness, and permanent deformation. Hardness and permanent deformation of the

sealing performance. General, high hardness, small amount of permanent deformation

after compression, the better sealing performance. Generally 70 to 85 Shore A hydraulic swivel fittings

hardness, compression permanent deformation of 50% for the best. The thickness of

the inner layer is preferably 1.5 ~ 2.5mm, thick will increase its liquidity in the

withholding, resulting in the accu mulation of excess glue in the joint core set of

contact with the hose end, reducing the flow area; too thin withheld when

fracturing. An inner tube wall thickness uniformity is also very important. If the

thickness uneven compression will result in the breaking side, side of the heap of

plastic. Ma Hang is also an important factor to affect the performance and quality

of the surface of the inner layer.

2) hydraulic hose rely mainly on the enhancement layer to withstand the pressure.

Braided hose rely on glue and inside and outside layer of cement, will be different

due to their respective telescopic same braid wire between contact with each other,

under the dynamic pressure caused by friction between the wire with each other and

affect its durability. Pipe is different from the winding direction of two-tier form

a layer in the middle between the two layers of plastic, there is no cross point

between the two layers of steel wire of the same work. So it will not withstand

dynamic pressure between the wire cross-bending and the formation of stress

concentration or friction and wear. Therefore, good durability, can withstand high

pressure.

3) the outer layer of the hydraulic hose stick to play a protective role in the

enhancement layer commonly used neoprene. Should pay attention to prevent its aging

crack and affect the entire life of the hose.hydraulic components

Two. Connector

Swaged hose fittings connector cores, nuts, and coats.

1) connector cores, the length of the main factors affecting the performance of the

core rod, structural shapes, wall thickness and material. Require core rod from the

seal and to pre vent pulling off the point of view, the longer the better, but too

long to waste materials and increased manufacturing costs. In addition, in order to

prevent the withholding when the wick end to cause a heap of plastic, general design

requirements for its length slightly longer than the jacket can.

2) core rod, structural shapes, which are mainly R groove (Figure 1) and serrated

slot (Figure 2) can increase the friction surface for the rubber flow capacity

plastic tank. Steel wire braided tube with R-slot, the higher pressure Pipe with

serrated slot.

3) Material: of joints Xinzai materials generally 20 #, 35 #, 45 # carbon structural

steel, to prevent hole deformation withheld when the wick increased fluid

resistance, wick wall thickness should be noted that the selection is generally 1.5

~ 3.5 mm, diameter whichever is greater, wick cylindrical hose hole does not allow a

large amount of interference, can damage plastic, the Zhuangqiang with difficulties.

Wick inside the hole is too small will increase the fluid resistance caused by the

pressure drop. As the wick outer diameter of these limitations. The hose itself is

the size of the big changes in order to reach the connector assembly performance

throughput requirements must be resolved by optimizing the withheld amount to.

3. Connector jacket. The shape shown in Figure 3. Within the hole size should be

appropriate greater than the enhancement layer size, otherwise it is impossible to

load, even cause the enhancement layer is completely scattered the first phenomenon.

General gap of 1 ~ 1.5mm. Coat inside the trough will directly affect the quality of

the joint. There are straight holes trough, the zigzag trough, as well as circular

and serrated slot modular. (Figure 3)

Cotton (fiber) braided hose due to the use of pressure to pull out force, have

adopted no-slot structure. Steel braided hose is easy to produce in withholding its

enhancement layer bending, and more jagged. More general layers of wire winding

pipe, the enhance unilateral thickness of layer maximum of up to 3.6mm, withhold

when you make the enhancement layer to the formation of wavy distortion embedded in

the tank, you must use a combination of ring and serrated slot, this slot shape than

the sawtooth width of 2/3, anti-pull off stronger.