A swash plate hydraulic plunger motor or pump for submersion in water

Abstract

The invention discloses a swash-plate type hydraulic plunger motor or pump immersed in water for use. The swash-plate type hydraulic plunger motor or pump immersed in water for use comprises a main shaft (1), a rotating sealing component (2), a shell (4), a swash plate (6), a plunger return mechanism (7), a plunger (8), a cylinder body (9), a valve plate (10) and an end cover (12), and is characterized in that the main shaft (1) is supported by at least three bearings coaxially installed: the bearing A (3), the bearing B (5) and the bearing C (11), at least two bearings in the three bearings are centripetal thrust bearings, and installation directions of the two centripetal thrust bearings are opposite. Two of the three bearings are installed near the outward-extended end of the main shaft (1) and arranged between the rotating sealing component (2) and the swash plate (6). In the swash-plate type hydraulic plunger motor or pump immersed in water for use, the main shaft can bear large axial tension and large axial thrust, and be immersed into deep water for use. An impeller can be directly installed on the main shaft so as to simplify structure, and meanwhile, through the bi-directional pressure bearing sealing component, the effect that water and hydraulic oil can be efficiently insulated when the product is used in deep water can be guaranteed.

Description

technical field [0001] The invention belongs to the field of hydraulic pressure, and in particular relates to a swash plate hydraulic plunger motor or pump submerged in water, which is suitable for driving a drainage impeller (as a motor) or being driven by the drainage impeller (as a pump). Background technique [0002] In traditional swash plate hydraulic piston motors or pumps, the internal parts only exert radial force on the main shaft, so the bearings used have a strong bearing capacity for radial force, but poor bearing capacity for axial force, and the shaft end of the product is not Axial forces (both pull and push) or only minor axial forces are permitted. [0003] Traditional oblique-axis hydraulic piston motors or pumps are equipped with single or multiple radial thrust bearings inside. The bearing set can bear the axial pulling force toward the main shaft extension direction, but cannot bear the inward axial thrust. If a large pulling force is applied to the sh...

AI Technical Summary

Problems solved by technology

This leads to a complex structure of the device, a large axial dimension, and high manufacturing and maintenance costs

In addition, because the main shaft seal can only bear pressure in one direction, there is a risk of water pouring into the inner cavity of the hydraulic piston motor or pump when used in deep water

Images