Large-diameter hollow hydraulic oscillatory motor

Abstract

The invention discloses a large-diameter hollow hydraulic oscillatory motor in the technical field of mechanical engineering. The motor comprise a hollow rotor, a motor shell component, two end covers, four sealing pieces and a base, wherein the hollow rotor is arranged inside the motor shell component; the two end covers are fixed on the two sides of the motor shell component respectively; the four sealing pieces are arranged on a matching surface of the two end covers and the motor shell component and on a matching surface of the two end covers and the hollow rotor respectively; and the base is fixedly connected with the motor shell component. By the motor, the non-deformability of a rotating shaft can be enhanced, leakage can be reduced, the abrasion disturbance moment can be reduced, and a hollow diameter can reach more than 550 mm.

Description

technical field [0001] The invention relates to a driving element in the technical field of mechanical engineering, in particular to a large-diameter hollow hydraulic swing motor. Background technique [0002] The hydraulic swing motor is an actuator that converts hydraulic energy into mechanical energy and outputs rotary motion. It usually consists of a rotating shaft, a cylinder liner, a bearing seat, moving blades, fixed blades, bearings, end covers, seals and fasteners. The fixed blade is fixedly connected to the cylinder liner, the moving blade is fixedly connected to the rotating shaft, and forms a working oil chamber with the bearing seat and the cylinder liner. After the hydraulic oil with pressure is injected into the working oil chamber, the moving blade is driven to make the rotating shaft output the rotating motion. [0003] After searching the prior art, it is found that most of the existing swing motor shafts are solid shafts, but in some specific occasions, it...

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Problems solved by technology

However, the structure of the HS type hydraulic swing motor is not suitable for large-diameter hollow hydraulic swing motors: (1) The hollow shaft is in the shape of a straight cylinder. When the hollow diameter becomes larger and the rotational inertia of the shaft is required to be small, the shaft is easily deformed under the action of oil pressure; (2) The pre-tightening force of the packing used for the dynamic seal of the working oil chamber end face is provided by the wave spring, but the rigidity of the large-diameter wave spring is not easy to increase, and the pre-tightening force provided is limited

At present, the maximum hollow diameter of the shaft of the HS type hollow hydraulic swing motor is only 2 inches (50.864mm, HS15 type), which cannot meet the requirements of the hollow diameter of the shaft of hundreds of millimeters in some occasions

[0004] The main difficulties in the design of large-diameter hollow hydraulic swing motors are as follows: (1) In order to provide enough installation space for loads or test components, the shaft of the hollow hydraulic swing motor is hollow and has a large hollow diameter. At the same time, in order to meet the dynamic requirements of the system, the shaft The moment of inertia cannot be too large, and the thickness of the shaft wall will be limited. Therefore, the anti-deformation problem of the shaft under the action of high oil pressure is prominent; (2) The shaft of the hollow hydraulic swing motor has a large diameter and is hollow, and the sealing surface of the end face of the motor working chamber has a large circumferential length , small leakage, low friction seal design is difficult

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