Cam rotors for cam rotor vane hydraulic servomotors

A cam rotor and hydraulic servo technology, which is applied in the field of servo motors, can solve the problems of unstable motor output torque, unstable radial motion of blades, sudden changes in acceleration, etc., and achieve small torque ripple, good servo performance, and stable operation Effect

Active Publication Date: 2016-08-17
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology uses a square cosine curve as the expression of the transition curve. Using this kind of cam can meet the torque and flow of the motor without pulsation under ideal conditions, but the radial motion of the blade is not stable, and the acceleration has a sudden change, which will cause disturbance torque. , so that the motor output torque is not stable and the service life is short, and the noise is large

Method used

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  • Cam rotors for cam rotor vane hydraulic servomotors
  • Cam rotors for cam rotor vane hydraulic servomotors
  • Cam rotors for cam rotor vane hydraulic servomotors

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Embodiment Construction

[0023] The following is a detailed description of the embodiments of the present invention: this embodiment is implemented on the premise of the technical solution of the present invention, and provides detailed implementation methods and specific operation processes. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention.

[0024] This embodiment provides a cam rotor for a cam rotor vane hydraulic servo motor, including a cam, the cam includes a cam major diameter R, a cam minor diameter r, and a transition curve between the cam major diameter and the cam minor diameter, the The transition curve between the cam major diameter and the cam minor diameter of the cam is a polynomial curve cluster, and its mathematical expression is:

[0025]

[0026] In the formula, is the transition curve with the small ...

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Abstract

The invention provides a cam rotor of a cam rotor blade type hydraulic servo motor. The cam rotor comprises a cam, wherein a transition curve between the large diameter and the small diameter of the cam is a polynomial curve cluster; a mathematical expression of the polynomial curve cluster is shown in the specification, and in the expression, rho(phi) is a radius vector at a rotation angle (phi) which takes a small-diameter end on the transition curve as a starting point, R is the cam large diameter, r is the cam small diameter, alpha is the size of a central angle of the transition curve, N is a positive integer which is not more than 5, and bi is a coefficient meeting the equation set shown in the specification, wherein i is equal to 1, 2, 3...N. According to the cam rotor of the cam rotor blade type hydraulic servo motor, the driving torque and the flow of the motor have no pulse and the vibration noises can also be effectively reduced, so that the high-performance requirements on the motor of a hydraulic servo system are met.

Description

technical field [0001] The invention relates to the technical field of servo motors, in particular to a shock-free and low-noise cam rotor for a cam rotor vane hydraulic servo motor. Background technique [0002] A stable driving torque without vibration is the necessary basis for good performance of the servo motor. If the servo motor has structural large torque ripple, even if the control system is well done, the overall performance of the servo motor will hardly meet the requirements. [0003] The transition curve of the motor cam rotor is a key factor affecting the drive torque. Existing cam rotor hydraulic motors generally use quadratic curves as the transition curves of the cam, such as quadratic Archimedes curves, quadratic constant acceleration and deceleration curves, quadratic sine curves, and quadratic cosine curves. These curves can meet the torque and flow of the motor without pulsation under ideal conditions, but because they cannot satisfy the stability of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03C2/00
Inventor 王旭永张文俊陶建峰徐川辉苗中华
Owner SHANGHAI JIAOTONG UNIV
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