Proportional direction valve
A proportional directional valve, proportional electromagnet technology, applied in the direction of fluid pressure actuating device, servo motor assembly, mechanical equipment, etc., can solve the problems of easy oil leakage, deformation and fracture of proportional electromagnet, and achieve low working noise and high working efficiency. Small thrust, the effect of improving the sealing environment
Inactive Publication Date: 2006-05-17
NINGBO HOYEA MACHINERY MFG
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Problems solved by technology
[0003] The technical problem to be solved by the present invention is to overcome the defects that the proportional electromagnet ejector rod and its oil cavity area of the existing background technology products need to withstand the control oil pressure provided by the high-pressure oil pump for a long time, which causes the proportional electromagnet to deform, easily leak oil or even break. , to provide the society with a proportional directional valve with low sealing requirements between the proportional electromagnet and the pilot valve body, small working thrust of the proportional electromagnet, and sensitive response of the pilot valve spool
Method used
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Embodiment Construction
[0012] Such as figure 1 As shown, the proportional directional valve product of the present invention includes two parts, the pilot valve 9 and the main valve 14 . The pilot valve 9 includes proportional electromagnets 1 and 6 at the left and right ends, a pilot valve body 4 , and a pilot valve core 3 arranged in the pilot valve body 4 . A transverse oil passage a is arranged inside the pilot valve body 4, and a T hole communicating with the return oil of the control oil is arranged on the oil passage a. Damping screws 2 and 5 are respectively set at the ports where the transverse oil passage a enters the left and right proportional electromagnet ejector rod oil chambers A1 and B1. At the lateral position below the pilot valve spool 3, two oil passages c and b are drawn from the left and right proportional solenoid ejector rod oil chambers A1 and B1 respectively, and vertical oil passages d and n are respectively arranged at the transverse hole ends of the oil passages c and ...
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The invention discloses a proportional directional valve, which overcomes the defects of large thrust required by the proportional electromagnet and easy oil leakage of the existing products. It includes two parts, the pilot valve and the main valve; the pilot valve includes the left and right proportional electromagnets, the valve body, and the spool located in the valve body; the main valve includes the main valve body and the spool located therein, and is characterized in that: the There is a horizontal oil passage in the body of the pilot valve, the two ends of which are connected to the left and right proportional electromagnet ejector rod oil chambers, the middle part of the oil passage is provided with an oil return hole, and the ports entering the left and right proportional electromagnet ejector rod oil chambers are all provided with damping screws; The control oil port of the valve body communicates with the control oil passage in the middle of the pilot valve body through the oil passage in the valve body. There are throttling windows on the top. The invention has the advantages of novel structure, small thrust required by the proportional electromagnet, and low sealing requirement, which is beneficial to increase the service life and reduce the production cost, and can be widely used in the hydraulic control system of the plastic machine industry and mechanical processing equipment.
Description
technical field [0001] The invention relates to a hydraulic transmission control component, in particular to a spool type proportional directional valve for controlling the flow by controlling the displacement of the spool. Background technique [0002] The spool type proportional directional valve generally uses a proportional electromagnet to drive the spool, and uses the principle that the input voltage or current of the proportional electromagnet is proportional to the displacement of the spool to control the flow of hydraulic oil. It is widely used in injection molding machines, In the hydraulic control system of mechanical processing equipment such as die-casting machines, extrusion machines and stretching machines. Existing typical products include the 4WRZ16 pilot control spool valve produced by German REXROTH company. This valve can form different pressure differences in the A and B chambers at both ends of the main valve, so that the main valve core can move to con...
Claims
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IPC IPC(8): F15B13/044
Inventor 凌俊杰翁振涛
Owner NINGBO HOYEA MACHINERY MFG