Dual volume pump
A dual-capacity, capacity technology, applied in the direction of pumps, variable-capacity pump components, multi-cylinder pumps, etc., can solve the problem of inability to set the pump discharge capacity to zero, and achieve the effect of reliable pressure compensation
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[0039] Hereinafter, embodiments of the present invention will be explained using the drawings. figure 1 It is the appearance diagram of the dual capacity pump of the present invention, figure 2 It is a circuit diagram, and Figure 3 is a cross-sectional view of the structure of the dual-capacity pump.
[0040] in figure 2 Among them, the dual-capacity pump 10 includes: a pump main body 12 which is rotationally driven to suck and discharge liquid; a variable capacity mechanism 14 which can change the discharge capacity per unit rotation of the pump main body 12; and a capacity switching valve 16 which The high-pressure side flow path and the low-pressure side flow path are selectively communicated with the pilot pressure passage, and the pilot pressure path communicates with the pressure receiving portion of the variable displacement mechanism 14, and the dual displacement pump 10 also has a pressure that constitutes a pressure compensation mechanism. Compensation valve 18. The pu...
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