High-pressure gear pump floating side plate with pressing plate

Abstract

The invention discloses a high-pressure gear pump floating side plate with a pressing plate, belonging to the technical field of high-pressure gear pumps. A W-shaped balance groove and an unloading groove are formed in one side of the floating side plate, a W-shaped sealing groove is formed in 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 unloading groove, a W-shaped sealing ring is arranged in the W-shaped sealing groove, the thickness of the W-shaped reinforcing rib is less than the depth of the W-shaped sealing groove, a W-shaped pressing plate is arranged on the W-shaped sealing groove, and a W-shaped shallow slot is formed in the inner side of the W-shaped pressing plate. The W-shaped sealing ring can be well pressed by a region around the W-shaped shallow slot to ensure that a sealing effect of three end faces of the W-shaped sealing ring is well improved, the leakage of the floating side plate and the end face of a gear is effectively controlled, and the pressure resistance level of a hydraulic gear pump is increased.

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...

AI Technical Summary

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

Images