Bidirectional gear oil pump or motor provided with full-hydraulic floating packingless bidirectional shaft sleeves

Abstract

The invention discloses a bidirectional gear oil pump or a motor provided with full-hydraulic floating packingless bidirectional shaft sleeves. The bidirectional gear oil pump or the motor comprises a pump body, a gear shaft, a gear, two shaft sleeves, a front end cover and a rear end cover, wherein the gear comprises a driving gear and a driven gear, the driving gear is meshed with the driven gear, the gear shaft comprises a driving gear shaft and a driven gear shaft, one end of the driving gear shaft is inserted into an inner cavity of the pump body, the driving gear, the driven gear and the driven gear shaft are arranged inside the inner cavity of the pump body, driving gear and the driven gear are sleeved on the driving gear shaft and the driven gear shaft respectively, two shaft sleeves are arranged on two sides of the driving gear and the driven gear respectively, and shaft sleeves are sleeved on the driving gear shaft and the driven gear shaft. The bidirectional gear oil pump or the motor has the advantages that shaft sleeves can always be attached to end faces of gears effectively, a sealing structure is omitted, the volume efficiency of the hydraulic pump is improved, the starting torque is reduced, free conversion between a high-pressure area and a low-pressure area can be achieved and the like.

Description

technical field [0001] The invention relates to a bidirectional gear oil pump or a motor provided with a fully hydraulic floating non-sealed bidirectional 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 cylinder and the meshing gear to deliver or pressurize the liquid. It consists of two closed spaces consisting of two gears, the pump body and the front and rear covers. Such as Figure 7 As shown, the hydraulic gear pump includes a pump body, a driving gear, a driven gear, a front end cover and a rear end cover and other components. There are bushings on both sides of the gear, and one side of the bushing is fitted to the end face of the gear. [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 lev...

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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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