Rotor assembly of 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. The rotor assembly of the vane type hydraulic motor comprises a rotor connected with an output shaft, and retractable blades, wherein the blades are annularly distributed on the outer wall of the rotor, and the blades are driven by hydraulic pressure. The pressure provided for each blade is the same, so that the overall friction force is smaller than that of an existing structure; besides, the contact pressure can be adjusted externally, and the arrangement is relatively flexible; the breaking probability is reduced as the overall friction force is small, telescoping sealing of the blades is matched with rotation, and the sealing instantaneity is guaranteed; whenthe blades stretch, tangential resistance of a sealing head is improved through an arc spring piece, the sealing performance of the sealing head is also improved, and torque output is guaranteed; when the blades contract, the friction force between the blades and the groove wall of the rotor is increased through the spring piece, and the top friction pressure is reduced; and meanwhile, the contact position with the inner wall of a stator is changed, sealing contact is changed into wear-resistant low-friction contact, and the overall friction force is further reduced.

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 Image 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 cont...

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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