Hydraulic speed regulation loop system for axial plunger variable-displacement motor

• Main Authors: DONG XIRONG, DONG WENGUANG
• Format: Patent
• Language: English
• Published: 11.03.2015
• Subjects: BLASTING; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR; FLUID-PRESSURE ACTUATORS; FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS; HEATING; HYDRAULICS OR PNEUMATICS IN GENERAL; LIGHTING; MECHANICAL ENGINEERING; SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; WEAPONS

The utility model discloses a hydraulic speed regulation loop system for an axial plunger variable-displacement motor. According to the hydraulic speed regulation loop system for the axial plunger variable-displacement motor, a servo sliding valve, a one-way valve, a hydraulic motor A, a hydraulic motor B, a hydraulic oil pipeline, a hydraulic-control one-way valve C, a hydraulic-control one-way valve D, a hydraulic-control one-way valve E and a hydraulic-control one-way valve F are additionally arranged, two hydraulic motor transmission shafts both connected to the hydraulic oil pipeline are in rigid connection, a direct oil return pipeline of a hydraulic cylinder is controlled by a swash plate A of the hydraulic motor A, the servo sliding valve is connected to the portion, between the hydraulic motor B and an electromagnetic directional valve of the oil pipeline, and the hydraulic-control one-way valve C is connected with the hydraulic motor B in parallel. When a piston rod of the hydraulic cylinder stretches out, the pressure difference between the two ends of a hydraulic-control one-way valve B is controlled to be 2 MPa, and the throttling loss of a hydraulic system is reduced; the hydraulic motor A is driven by the hydraulic B to rotate, the pressure of oil of the hydraulic motor A is made to be increased by consuming power of the hydraulic motor B, then oil of the hydraulic motor A enters a pressure oil pipe, and then a differential loop is formed. According to the hydraulic speed regulation loop system for the axial plunger variable-displacement motor, the throttling loss of the hydraulic system can be reduced when the piston rod of the hydraulic cylinder stretches out, the service life of oil is prolonged, and the failure rate of equipment is reduced.