Floating side plates for ultra-high pressure gear pumps

Abstract

The invention discloses a floating side plate of an ultrahigh voltage gear pump and belongs to the technical field of high voltage gear pumps. According to the invention, a W-shaped balancing groove and an unload groove are formed on one side of the surface of the floating side plate; a W-shaped sealing groove is formed on the other side of the floating side plate; a W-shaped reinforcing rib is arranged in the W-shaped sealing groove; a through hole is formed between the W-shaped sealing groove and the unload groove; a W-shaped sealing ring is mounted in the W-shaped sealing groove; and a W-shaped supporting strip adaptive to the inner side of the W-shaped sealing ring is mounted on the inner side of the W-shaped sealing ring. The floating side plate of the ultrahigh voltage gear pump, disclosed by the invention, can bear an ultrahigh pressure; the pressure resistance grade of a hydraulic gear pump is enhanced; the stressed status of a gear shaft is improved; the reliability of the gear pump is improved and the service life of the gear pump is prolonged.

Description

technical field [0001] The invention relates to a floating side plate of a high-pressure gear pump, belonging to the technical field of axial pressure compensation floating components of a gear hydraulic pump. Background technique [0002] At present, construction machinery products require the rated pressure of the supporting hydraulic gear oil pump to reach 25-28MPa, and some even require more than 31.5Mpa. With the intensification of the high-pressure process of hydraulic gear pumps, higher requirements are put forward for the performance of hydraulic gear pump end surface floating compensation components: under ultra-high pressure and high temperature, the floating side plate can maintain pressure balance without plastic and bending deformation; Under the impact of ultra-high pressure and unsteady flow pulsation, the sealing part of the side plate will not be damaged or deformed by impact. [0003] With the increase of the pressure level, the existing hydraulic gear pum...

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Problems solved by technology

[0003] With the increase of the pressure level, the existing hydraulic gear pumps face the following problems: First, the radial unbalanced force on the main and slave gear shafts of the hydraulic gear pump is greatly increased, which requires the gear shaft to be structurally optimized to reduce the radial force imbalance. The deflection deformation caused by the balance force, or changing the material of the gear shaft to improve its mechanical properties; second, the formation and maintenance of the friction pair between the floating side plate and the gear end face of the hydraulic gear pump under high temperature, high pressure and high speed becomes more and more difficult

Under ultra-high pressure, increasing the compression amount of the seal to achieve float compensation will greatly reduce the mechanical efficiency of the hydraulic gear pump

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