Sleigh mounted electrohydraulic ratio regulating valve and system
A technology of electro-hydraulic proportional and speed control system, which is applied in the direction of fluid pressure actuation device, measurement, wellbore/well components, etc., and can solve the problem of motor failure and other problems
Active Publication Date: 2008-03-12
CHINA OILFIELD SERVICES
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Problems solved by technology
[0003] In order to overcome the deficiency that the motor in the existing circuit cannot work normally at low speed, the present invention provides a skid-mounted electro-hydraulic proportional speed regulating valve
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[0015] The present invention will be further introduced below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.
[0016] Referring to Figure 2, it is a hydraulic schematic diagram of a skid-mounted electro-hydraulic proportional speed regulating valve. The skid-mounted electro-hydraulic proportional speed control valve includes: a differential pressure reducing valve 1, an electro-hydraulic proportional throttle valve 2, a one-way valve 3 and a two-position two-way hydraulic slide valve 4, wherein: hydraulic When the spool valve 4 has no control pressure oil at the control oil port X, the oil passage between the inlet and outlet valve ports is connected; when there is control pressure oil at the control oil port X, the oil passage between the inlet and outlet valve ports is blocked; An electro-hydraulic proportional throttle valve 2 is connected in series at the output end to form an electro-hydraulic prop...
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The sleigh mounted electrohydraulic ratio regulating system includes one bidirectional variable capacity pump, one bidirectional variable capacity motor, and two sleigh mounted electrohydraulic ratio regulating valves with parallel controlling oil port and connected in the serial loop of the bidirectional variable capacity pump and the bidirectional variable capacity motor. The sleigh mounted electrohydraulic ratio regulating valve includes one main valve and one electrohydraulic ratio regulating valve connected in parallel, the main valve consists of one monoway valve and one hydraulic slide valve connected in parallel, and slide valve has oil passage between the oil inlet and the oil outlet opened while no pressure oil in the control oil port and closed while existing pressure oil in the control oil port. The present invention may be used in class II petroleum explosion preventing area, and has both volume speed regulation and electrohydraulic ratio throttle speed regulation capable of converting automatically.
Description
technical field [0001] The invention relates to a skid-mounted special speed regulation system in the petroleum logging industry, in particular to a skid-mounted electro-hydraulic proportional speed regulation capable of realizing two speed regulation functions of volumetric speed regulation and electro-hydraulic proportional throttling speed regulation in a hydraulic circuit system. Background technique [0002] The existing skid-mounted hydraulic speed-regulating circuit is a volumetric speed-regulating circuit composed of a variable pump and a variable motor. Figure 1 is the hydraulic schematic diagram of the skid-mounted hydraulic speed-regulating circuit in the prior art. The circuit changes the output speed of the variable motor through the flow change caused by the change of the displacement of the variable pump to realize the speed regulation of the skid-mounted winch. Its characteristics are: the design of the drive system is simple, and the control is convenient a...
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IPC IPC(8): F15B11/04E21B47/00
Inventor 王小春马梓晋
Owner CHINA OILFIELD SERVICES