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To Help You Open The Mysterious Veil Of Hydraulic Valve Structure

Hydraulic valve in many users is so complex psychological, do not know his inner structure to what is like? Hydraulic valve to be reliable operation, requiring piston-type spool strong, flexible lift, can always keep the pressure relief chamber closed and can be closed according to the needs of the water chamber; pressure chamber and inlet chamber channel hole. Here to explain the specific structure of the hydraulic valve:

According to the knowledge of hydraulics, P1 = C1 = (Z-ball) + P-ball / γ + (α3ν 2-α2ν 2) / 2g + (h loss 2-h loss 1) (2) / 2g-h loss 3]] ω and subscript: the area corresponding to the cross-section of the water flow ν and subscript: the liquid flow rate corresponding to the cross-section of the water flow Z and subscript: the geometric elevation of the corresponding cross section of the water flow P and subscript: that the water pressure γ: liquid specific gravity α and subscript: the corresponding kinetic energy dressing coefficient h and subscript: along the line and the loss of local head

It can be seen that the smaller the orifice channel d1 connecting the relief chamber, the larger the head loss h is 3, the C1 value decreases. Can be seen to reduce the diameter of the small hole channel d1 help to reduce the value of C1, float valve open, the spool can quickly rise, open the hydraulic valve. When the float valve is closed, the pressure drop of the pressure relief chamber can be reduced due to the decrease of the water recharge capacity, and the hydraulic valve can be reduced (and avoided).

Small hole channel diameter d1 is too small, likely to cause the hole block, resulting in hydraulic valve switch is not working. In addition, increasing the diameter of the piston valve spool end of the pressure relief chamber helps to reduce the pressure of the valve closing pressure; but will increase the requirements of the valve pressure P0.