Rotor assembly of a vane type hydraulic motor

Abstract

The invention relates to the technical field of hydraulic motors, and discloses a rotor assembly of a vane type hydraulic motor, which includes a rotor connected to an output shaft and retractable fan blades, the fan blades are annularly distributed on the outer wall of the rotor, and the fan blades are Driven by hydraulic pressure. The pressure provided for each fan blade is the same, and the overall friction force is smaller than the existing structure. Secondly, the contact pressure can be adjusted externally, and the setting is relatively flexible. Because the overall friction force is small, the chance of breaking is reduced, and there are other The elongation seal and the rotation match to ensure the immediacy of the seal. The invention increases the tangential resistance of the sealing head through the arc-shaped spring piece when the fan blade is elongated, and at the same time increases its sealing performance to ensure the output of torque. When shrinking, the friction force between the fan blade and the rotor groove wall is increased by the spring plate, and the friction pressure on the top is reduced. At the same time, the contact position with the inner wall of the stator is changed, and the sealing contact is changed to a wear-resistant low friction contact, which further reduces the overall friction force.

Description

technical field [0001] The invention relates to the technical field of hydraulic motors, in particular to a rotor assembly of a vane type hydraulic motor. Background technique [0002] see Figure 6 , is a vane-type hydraulic motor. The hydraulic oil drives the vanes to drive the rotor to rotate. The vanes automatically expand and contract under the force of the spring at the bottom, and cling to the inner wall of the stator to ensure the sealing between the impellers and the stator. [0003] The impeller is a hydraulic motor that is mostly used in high-speed and frequently-changing occasions. When it rotates, the blades are always close to the inside of the stator, and it will wear out quickly due to high-speed friction. Although the spring force drives its expansion and contraction, it can compensate for the loss of some blades wear, but in order to ensure that the pressure between the blade and the stator can maintain sufficient pressure in the elongated state and the con...

AI Technical Summary

Problems solved by technology

[0003] The impeller is a hydraulic motor that is mostly used in high-speed and frequently-changing occasions. When it rotates, the blades are always close to the inside of the stator, and it will wear out quickly due to high-speed friction. Although the spring force drives its expansion and contraction, it can compensate for the loss of some blades wear, but in order to ensure that the pressure between the blade and the stator can maintain sufficient pressure in the elongated state and the contracted state, in fact, the compression of the spring is relatively large in the compressed state, and the pressure between the blade and the stator is too large , Excessive pressure will accelerate the wear of the blades and reduce their service life

[0004] In order to reduce the friction between the blade and the stator, the blade is usually designed to be very thin, and the hydraulic pressure and friction force on the blade are tangential, making the blade easily deformed or even broken, causing leakage and reducing the efficiency of the hydraulic motor. On the other hand, in order to ensure that the pressure between the blade and the stator is moderate, the elastic force of the spring is limited. In the case of deformation, it will increase the friction between the blade and the rotor, causing difficulty in expansion and contraction, and making the seal lag relative to the rotation, further reducing the tightness, reducing motor efficiency

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