Stepless hydrodynamic transmission device

Abstract

A stepless hydraulic transmission device, including a front-stage eccentric movable vane pump, a movable seat, a secondary eccentric movable vane pump, and a displacement control device; the front-stage eccentric movable vane pump is movably arranged on one side of the movable seat, The secondary eccentric movable vane pump is arranged on the opposite side of the movable seat; the pre-stage eccentric movable vane pump includes the first rotor of the pre-stage, several movable vanes of the pre-stage, the second rotor of the pre-stage connected with the movable vanes of the pre-stage one by one and The front-stage eccentric part; the secondary eccentric movable vane pump includes the secondary first rotor, several secondary movable vanes, the secondary second rotor and the secondary eccentric part connected to the secondary movable vanes one by one; the front-stage eccentric part It is installed on the movable seat; there is a displacement control device on the movable seat, and the displacement control device controls the rotation or translational movement of the movable seat, thereby changing the eccentric distance between the front-stage eccentric member and the front-stage first rotor. The transmission device has the advantages of large transmission torque, which can not only increase the output torque, but also increase the output speed, and can also transmit high-efficiency torque transmission under the condition that the output shaft speed exceeds the input shaft.

Description

technical field [0001] The invention relates to the field of power transmission, in particular to a stepless hydraulic transmission device, which can be used as a transmission device such as a reducer, a speed changer, a hydraulic coupling, a hydraulic torque converter, and the like. Background technique [0002] The transmission device is the main component in mechanical work. The variable speed transmission device mainly includes belt / metal belt transmission, gear transmission and hydraulic transmission. The disadvantage of gear transmission is that it only has several fixed transmission ratios. When switching transmission ratios, a clutch or a fluid coupling / torque converter is required to participate in the work. The CVT stepless transmission part consists of an oil pump, driving wheel, metal belt, driven wheel and control Composed of oil cylinders, the diameter of the driving wheel and the driven wheel can be continuously changed within a certain range, so as to realize...

AI Technical Summary

Problems solved by technology

The hydraulic torque converter mainly adjusts the transmission ratio of the hydraulic torque converter through the action state of the liquid fluid and the guide wheel, and the transmission ratio is a continuously variable number less than or equal to 1. When the hydraulic torque converter is working at high efficiency The torque conversion coefficient is small, and the excessive torque conversion coefficient will significantly reduce the efficiency of the hydraulic torque converter. When the pump wheel has torque output to the turbine, the turbine speed is smaller than the pump wheel

Images