Sector and rack type reciprocating pump

Abstract

The invention relates to a sector and rack type reciprocating pump which mainly comprises a framework, an input shaft, a sector, a rack assembly, guide rails, a piston, a hydraulic cylinder and the like. The input shaft is mounted on the framework via bearings, the sector is mounted on the input shaft and meshes with the rack assembly, and the rack assembly is arranged between the upper and lower guide rails. Gear teeth of the rack are controlled in circumferential angles of 160-165 degrees, and a first tooth of the sector and tooth root circles are in smooth circular arc transition; the rack assembly comprises an upper rack, a lower rack and rack connecting pieces, smooth gaps with certain distances are reserved at the tail ends of two sides of the upper rack and the tail ends of two sides of the lower rack, and a piston rod is fixedly connected with an end of the rack assembly; the hydraulic cylinder at a hydraulic end of the sector and rack type reciprocating pump is a double-acting single-side arrangement or single-acting double-cylinder symmetric arrangement structural form. The sector alternately meshes with the upper rack and the lower rack when mechanisms work, and accordingly the piston can be pushed to carry out reciprocating movement. The sector and rack type reciprocating pump has the advantages of simple and compact structure, small occupied spaces, high system efficiency and low pump pressure and pump displacement fluctuation.

Description

technical field [0001] The invention relates to a fan-and-rack type reciprocating pump used in petroleum, chemical industry, mining and other industries. Background technique [0002] As the earliest pump machinery, reciprocating pumps can be divided into piston pumps and plunger pumps according to the different working mechanisms in contact with the conveying medium. It is suitable for conveying various high-viscosity, corrosive and other high-pressure fluid media. High efficiency and good working performance. Therefore, it is still widely used in various fields of industry so far, especially in oil drilling engineering, which occupies a very high position. 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 ter...

AI Technical Summary

Problems solved by technology

In this structure, the gear fan is a semicircular gear, and it is easy to interfere with the racks on both sides at the same time when the work is reversed; the rack assembly is a "Xuan" frame structure with low structural strength and low load-carrying capacity, which is not suitable for high-power reciprocating pump; and the power source of the piston pump is animal power or manpower. For industrial reciprocating pumps with high pump pressure and displacement requirements, the high pressure at the hydraulic end of the pump will have a huge impact on the gear fan when the pump reverses direction, causing the wheel of the semicircular gear. tooth damage

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