Full-hydraulic floating sealing-free bidirectional shaft sleeve

Abstract

The invention discloses a full-hydraulic floating sealing-free bidirectional shaft sleeve. The shaft sleeve comprises an aluminum sleeve, a lining sleeve and a shaft sleeve body, wherein two through holes which penetrate through the shaft sleeve along the thickness direction of the shaft sleeve body are formed in the shaft sleeve body; an oil outlet is formed between the two through holes on the shaft sleeve body; a hollow cavity is formed in the shaft sleeve body; a valve seat is arranged at the left end of the hollow cavity; a valve sleeve is arranged at the right end of the hollow cavity; a valve cavity is formed in the valve sleeve; a first oil duct is arranged on the valve seat; a second oil duct and a third oil duct are arranged on the shaft sleeve body; the third oil duct is communicated with the oil outlet; the first oil duct, the second oil duct and the third oil duct are communicated with the valve cavity in the valve sleeve; and a steel ball is arranged in the valve cavity. The full-hydraulic floating sealing-free bidirectional shaft sleeve has the advantages that the shaft sleeve can be effectively adhered to the end surfaces of gears, so that a sealing structure is eliminated, the volume efficiency of a hydraulic pump is improved, the start torque is reduced, the free conversion between a high-pressure zone and a low-pressure zone is realized, and the like.

Description

technical field [0001] The invention relates to a fully hydraulic floating non-sealed two-way shaft sleeve. Background technique [0002] The hydraulic gear pump is a rotary pump that relies on the change and movement of the working volume formed between the pump body and the meshing gear to transport or pressurize the liquid. It consists of two closed spaces consisting of two gears, a pump body, a shaft sleeve and a front and rear cover. [0003] In the prior art, there is no oil passage inside the sleeve (such as Figure 5 and Figure 6 As shown), the hydraulic gear oil pump / motor faces the following problems with the increase of the pressure level: 1) the effectiveness of the internal sealing structure; 2) due to the insufficient and uneven hydraulic thrust on the back of the bushing, only the addition of seals The amount of compression and the pressure resistance of the sealing material will greatly reduce the mechanical efficiency of the gear oil pump (motor), which do...

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Problems solved by technology

[0003] In the prior art, there is no oil passage inside the sleeve (such as Figure 5 and Image 6 As shown), the hydraulic gear oil pump / motor faces the following problems with the increase of the pressure level: 1) The effectiveness of the internal sealing structure; 2) Due to the insufficient and uneven hydraulic thrust on the back of the bushing, only the addition of seals The amount of compression and the pressure resistance of the sealing material will greatly reduce the mechanical efficiency of the gear oil pump (motor), which does not meet the design concept of energy saving and environmental protection

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