The invention discloses a balance valve group and a hydraulic system. The balance valve group comprises a balance valve (100), wherein the balance valve (100) is provided with a first balance valve working port (101) leading to loads, a second balance valve work oil opening (102) leading to an oil source or an oil tank, a balance valve hydraulic control cavity (103) and a balance valve spring cavity (104), and the balance valve hydraulic control cavity (103) and the balance valve spring cavity (104) are located at the two ends of a valve element of the balance valve (100). The balance valve group further comprises a pressure compensation device connected with the balance valve (100). Therefore, when hydraulic oil sequentially passes through the first balance valve work oil opening (101) and the second balance valve work oil opening (102) from the loads and flows back to the oil tank, the pressure difference between the first balance valve work oil opening (101) and the second balance valve work oil opening (102) keeps constant, and the flow amount of the hydraulic oil passing through the balance valve (100) depends on the position of the valve element of the balance valve instead of the pressure of the loads.
Balance valve group and hydraulic system
2015-11-11
Patent
Electronic Resource
English
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