Direct-acting type proportional throttle valve
A proportional throttle valve and direct-acting technology, applied in the hydraulic field, can solve problems such as poor sealing effect, prolonged response time, and increased control dead zone, and achieve long service life, improved response speed, and good reliability
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[0034] The specific implementation, features and functions of a direct-acting proportional throttle valve proposed according to the patent of the present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments.
[0035] see image 3 , a direct-acting proportional throttle valve, which is composed of a valve body 1b, a valve core 2b, a valve sleeve 3b and a spring 4b. The valve core 2b is provided with a conical surface C and an oil groove G, and the largest outer diameter of the conical surface C is The diameter of the spool is D, the outer diameter of the spool on the small end side of the conical surface C is d, and D>d; the valve body 1b is provided with oil port A and oil port B, and the spool 2b is assembled with the valve body 1b to form a transition volume Chamber V; one end of the spool 2b acts with a spring force, and the other end exerts a control force Fc; the valve sleeve 3b is on the side with the spring 4b...
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