Ball bearing screw pump

Abstract

The invention discloses a ball bearing screw pump comprising a driving and a driven screw meshed with each other. A ball bearing trough is arranged on a spiral surface where the driving and driven screws are meshed along a spiral line of the driving and driven screws. Ball bearings are arranged in parallel in the ball bearing trough. Diameter of the ball bearing is greater than depth of the ball bearing trough. The invention realizes point contact rolling friction, which can reduce friction among spiral surfaces when the pump operates, and prolong service life of the driving and driven screws as well as saves driving energy. For medium with stronger adaptability, the invention is applicable for medium with self-lubricating effect which is not high; the invention operates stably; reacts agilely without retardarceand slippage, which can obtain greater synchronous effect. An elastic sealing layer is arranged on the mesh surface correspondingly and the mesh surface is compensated by the sealing layer from hard contact, which ensures meshing effect to improve medium convey efficiency and reduce noise of spiral meshing motion.

Description

technical field [0001] The invention relates to a medium delivery pump, in particular to a ball screw pump. Background technique [0002] The screw pump uses the rotation of the screw to suck and discharge the liquid. The screw pump includes a driving screw and a driven screw matched with it. The driving screw is driven by the prime mover to rotate, and the driven screw rotates in the opposite direction with the driving screw. [0003] Due to the mutual engagement of the driving screw and the driven screw and the tight fit between the screw and the inner wall of the liner, one or more sealed spaces will be separated between the suction port and the discharge port of the pump. With the rotation and engagement of the screw, these sealed spaces are continuously formed at the suction end of the pump, sealing the liquid in the suction chamber, and continuously moving from the suction chamber to the discharge end along the axial direction of the screw, sealing the liquid in each ...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, the driving screw and the driven screw are directly meshed, the helical meshing surface is longer, and there is a large friction force during operation, which not only reduces the service life of the driving screw and the driven screw, wastes driving energy, but also affects the transmission medium. There are also self-lubricating requirements; due to the long meshing surface, the matching effect cannot be guaranteed, which not only reduces the efficiency of the conveying medium, but also causes relatively large noise during operation

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