Middle and small horsepower tractor hydraulic pressure distributer
2007
The utility model discloses a tractor hydraulic pressure distributor with small horse power, belonging to the technical field of agricultural machines. The technical proposal comprises a casing, on which an oil inlet, an oil return port and an oil outlet are arranged. The oil return port is communicated with an oil tank (2), the oil inlet is communicated with an oil pump (1), and the oil outlet is communicated with a hydraulic cylinder (9). A check valve (8), a declining electromagnetic control valve (6) and a differential type hydraulic control reversing valve (3) between the oil inlet and the oil outlet are in cone valve structure. A left control oil chamber of the differential type hydraulic control reversing valve (3) is communicated with the oil inlet, and the right control oil chamber is respectively communicated with the oil inlet and the oil return port through a two-position three-way electromagnetic reversing valve (4). A dynamical pressure feedback device, which is composed of a damping hole (10) and an accumulator (11), is mounted on an oil duct between the check valve (8) and the hydraulic cylinder (9) for improving the easement performance of operating the suspended machine set. The hydraulic pressure distributor has energy loss reduction, little leakage, fast action speed, stable operation, convenient installation, small structural dimension and the other advantages.
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