An axial piston buoyancy pump

Abstract

The invention discloses an axial plunger buoyancy pump, which comprises a drive mechanism and a ball screw driven by it, and is characterized in that the drive mechanism drives a sleeve to rotate, and the sleeve is sleeved on the ball screw The two are fixed on the nut, the front end of the sleeve is supported by a thrust ball bearing, the rear end of the sleeve is supported by an angular contact ball bearing, and the middle part of the sleeve is supported by a deep groove ball bearing. The contact ball bearing, the deep groove ball bearing and the thrust ball bearing are all installed in the bearing housing; the front end of the screw of the ball screw is fixed with a plunger, and the plunger is sealed and installed in the plunger cylinder. An end cover is fixedly connected to the front end of the plunger cylinder, and an outer oil bag is fixedly connected to the front end of the end cover, and the outer oil bag, the end cover, the plunger cylinder and the plunger constitute a A sealed cavity, hydraulic oil is injected into the sealed cavity, and the rear end of the plunger cylinder is fixedly connected with the front end of the bearing seat. The invention has large pressure bearing capacity and high working efficiency.

Description

technical field [0001] The invention belongs to the field of electromechanical integration, in particular to an axial plunger buoyancy pump used to drive an ocean vertical profile measurement platform to perform upward and downward movements. Background technique [0002] The buoyancy pump is an important device in the hydraulic system. Through the reciprocating movement of the plunger in the cylinder, the oil absorption and oil pressure process of the plunger changes the volume of the sealed cavity, thereby increasing the buoyancy of the underwater equipment. Changes occur to realize the floating and diving of the equipment. The axial buoyancy pump is a plunger pump in which the reciprocating direction of the plunger is parallel to the central axis of the cylinder. The plunger adopts the radial sealing form of two O-rings, so that the axial buoyancy pump has the advantages of low friction coefficient, high efficiency and small leakage (almost zero leakage). Internationall...

AI Technical Summary

Problems solved by technology

Since the above-mentioned buoyancy pump uses angular contact bearings to support the ball screw nut and curled plunger, the structure cannot withstand too much pressure, and can only withstand the pressure of 200m water depth: with the increase of water pressure, the angular contact bearing The bearing axial force will increase, so the friction of the angular contact bearing will increase sharply when it rotates, causing the bearing to require a large torque to rotate, which greatly reduces the transmission efficiency

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