Gear sector and rack type reciprocating pump limited by cam

Abstract

The invention relates to a rack-and-segment type reciprocating pump limited by a cam, which is mainly composed of a frame, an input shaft, a fan, a rack assembly, a cam, a limit frame, a guide rail, a piston and a liquid cylinder. Among them, the input shaft is installed on the frame through the bearing, the gear fan is installed on the input shaft, the gear fan meshes with the rack assembly, one end of the rack assembly is connected with the piston rod, and the other end is connected with the limit frame, and the cam is placed in the limit position. in the box. The gear teeth of the gear sector are composed of cylindrical gears and elliptical gears with variable transmission ratios, and the corresponding circumferential angle of the part with gear teeth is less than 180°; near the far angle of repose of the cam, there is a contour line matched with the limit frame . When the mechanism is working, the piston is driven to reciprocate through the alternate meshing between the gear fan and the upper and lower racks, and the smooth and stable reversing of the mechanism is ensured through the cooperation of the cam and the limit frame. The invention has the advantages of simple structure, precise and stable commutation, high system efficiency, and small fluctuation of pump pressure and pump displacement.

Description

technical field [0001] The invention relates to a rack-and-segment type reciprocating pump with cam limit used in petroleum, chemical industry, mining and other industries. Background technique [0002] As the earliest pump machinery, reciprocating pumps are still widely used in various fields of industry, especially in oil drilling engineering. In recent years, due to the needs of the development of oil drilling and oil production technology, the performance and variety of reciprocating pumps in oil fields have been further improved. At the same time, in order to adapt to the harsh working conditions of pumps used in mines, new changes have taken place in terms of structure, materials, manufacturing technology, and even the principle of action. [0003] With the development of industrial technology, the requirements for reciprocating pumps are getting higher and higher. High efficiency and energy saving, small flow and pressure pulsation, long life of wearing parts, simpl...

AI Technical Summary

Problems solved by technology

In addition, through the cooperation of the cam and the limit frame, the smooth reversing of the piston under the continuous operation of the motor can be realized, which solves the problem of abnormal meshing between the tooth fan and the rack during the reversing, so that the flow and pressure fluctuations of the reciprocating pump are small and easy to damage. The goal of long life of parts, simple commutation control and high reliability

Images