Gear sector and rack type reciprocating pump limited by cam

Abstract

The invention relates to a gear sector and rack type reciprocating pump limited by a cam. The gear sector and rack type reciprocating pump mainly comprises a rack, an input shaft, a gear sector, a rack assembly, the cam, a limiting frame, a guide rail, a piston and a hydraulic cylinder, wherein the input shaft is mounted on the rack through a bearing, the gear sector is mounted on the input shaft,and the gear sector is meshed with the rack assembly; one end of the rack assembly is connected with a piston rod, the other end of the rack assembly is connected with the limiting frame, and the camis arranged in the limiting frame; the gear teeth of the gear sector consist of a cylindrical gear and a variable-transmission-ratio elliptical gear, and the inscribed angle of the part with the gearteeth is smaller than 180 degrees; and a contour line matched with the limiting frame is arranged near the farthest dwell angle of the cam. When the mechanism works, the piston is pushed to make reciprocating movement through the alternating engagement of the gear sector and upper and lower racks, and the smooth and stable reversing of the mechanism is ensured through the cooperation of the cam and the limiting framework. The reciprocating pump is simple in structure, accurate and stable in reversing, high in system efficiency and small in pump pressure and pump displacement fluctuation.

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

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