Gear and rack type cooker hood

Abstract

A gear-rack type oil sucker consists of a frame, a gear and a rack, pulleys, a reciprocal frame for weight, and a controller. The reciprocal frame for weight consisting of a motor, a speed reducer, a brake and guide pulleys, is installed on the rack railing. A steel rope is connected with polish rod via the pulleys and rope-suspending device. The speed reducer has an output gear installed on the said frame to engage with the rack railing. The motor is connected with controller via its electric cables. The pulleys are arranged on the frame top. The oil sucker has simple and compact structure, strong bearing capacity, efficient transmission, long service life, and is reliable and easy in use, installation and maintenance, substitute as upgraded products.

Description

1. Technical field: [0001] The invention belongs to oil production equipment in the field of petroleum industry, and relates to an oil pumping unit for mechanical oil production in an oil field, in particular to a beamless pumping unit. 2. Background technology: [0002] In the petroleum industry, the pumping units in the prior art all have their own relatively serious defects that are difficult to overcome. The beam pumping unit has short stroke, poor balance effect, low system efficiency, and it is difficult to adjust the stroke and stroke times; the mechanically reversing non-beam pumping unit (such as chain type, belt type) has large reversing impact, and the mechanism Poor stress condition, low mechanical efficiency, many wearing parts, high manufacturing cost, short life, unable to adjust stroke, and difficult to adjust stroke times; non-mechanical reversing beamless pumping unit (such as friction reversing type) Then, due to the relative sliding and friction between ...

AI Technical Summary

Problems solved by technology

[0002] In the petroleum industry, the pumping units in the prior art all have relatively serious defects that are difficult to overcome by themselves.

The beam pumping unit has short stroke, poor balance effect, low system efficiency, and it is difficult to adjust the stroke and stroke times; the mechanically reversing non-beam pumping unit (such as chain type, belt type) has large reversing impact, and the mechanism Poor stress condition, low mechanical efficiency, many wearing parts, high manufacturing cost, short life, unable to adjust stroke, and difficult to adjust stroke times; non-mechanical reversing beamless pumping unit (such as friction reversing type) Then, due to the relative sliding and friction between the driving wheel (or drum) and the wire rope (or belt), the wear of the machine parts will increase, the mechanical efficiency will be reduced, and the movement accuracy of the mechanism will be poor, which will easily cause the upper and lower dead centers of the stroke to change, or even lead to downhole accidents

Moreover, it is difficult to install and disassemble the counterweight box, and it is inconvenient to install, use and maintain

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