Servo-driven hydraulic viscous speed control device

Abstract

The invention discloses a servo dry type liquid viscosity speed regulating device, which comprises a driving shaft, a left end cover, a cylinder body, a driving friction disc, a driven friction disc, a cylinder body sealing cover, a right end cover, a driven shaft, a large coupling, a push plate, a bearing fixing ring, a spline shaft, two thrust bearings, two pairs of shaft fixing seats, two polished shafts, two small linear bearings, a nut, a screw rod, a small coupling, a motor support seat, a servo motor and a bottom plate. In the speed regulating process, the servo motor drives the screw rod to drive the nut to move, the nut drives the push plate to sequentially drive the driven shaft to move along the axial direction through the thrust bearings and the large coupling, the thickness of an oil film of a gap between the working surface of the driven friction disc and the working surface of the driving friction disc is changed, and the output rotation speed is changed, so as to regulate the speed. The servo dry type liquid viscosity speed regulating device has the advantage that by utilizing the advantages of stable low-speed running, high-speed response, short dynamic response time of acceleration and deceleration, low noise and the like of the servo motor, the whole liquid viscosity speed regulating process is more stable, so the drive efficiency and the control accuracy are greatly improved.

Description

technical field [0001] The invention relates to a speed regulating device, in particular to a hydraulic viscous speed regulating device in a servo drive mode. Background technique [0002] Hydraulic viscous transmission is a newly developed form of fluid transmission, which mainly transmits power through the shearing action of the viscous oil film between the active and passive friction discs, works under the slip state of the two friction plates and realizes stepless speed regulation. The speed regulation principle can be expressed by the transmission torque formula of the hydraulic viscous speed regulation device when a pair of friction discs work: M =1 / 2* u * A *( R 1 ^2+ R 2 ^2)*Δ w / h . in u is the oil dynamic viscosity (Pa s), A is the effective area of ​​the friction face (m 2 ), R 1 and R 2 are the inner and outer diameters of the friction surface (m), Δ w is the speed difference between the two friction discs (1 / s), h is the oil film thickness. F...

AI Technical Summary

Problems solved by technology

This kind of device adjusts the speed through hydraulic pressure regulation. Due to the low efficiency of the hydraulic speed regulation method, the dead zone of the component will cause the response speed to slow down. During the speed regulation process, the thickness of the oil film is within the small working range of 0~1mm. In the test device, it is difficult to achieve control accuracy by adjusting the thickness of the oil film by hydraulic means

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