Pumping unit with auxiliary balance device

Abstract

The invention discloses a pumping unit with an auxiliary balance device. The pumping unit comprises a pumping unit body, and the auxiliary balance device is connected with a walking beam tail part of the pumping unit body. According to the structure of the auxiliary balance device, a rear horse head is fixedly connected with one end of a connecting rod, the other end of the connecting rod is connected with the walking beam tail part, and the rear horse head is connected with a hydraulic cylinder type balance weight through a suspension line. According to the pumping unit with the auxiliary balance device, hydraulic oil is injected to the hydraulic cylinder type balance weight so as to be matched with the balance weight of original oil extracted by a sucker rod in the working process, and thus ideal dynamic equilibrium is realized. Due to the fact that the weight part needs to be lifted by an engine originally, no new energy consumption is added through the injection type balance weight, the power output of a motor is changed to tend to be lowered, and electric energy loss is lowered.

Description

technical field [0001] The invention relates to the field of pumping units, in particular to a pumping unit with an auxiliary balancing device. Background technique [0002] At present, during the up and down strokes of the beam pumping unit, the load change of the polished rod will directly lead to the change of the power output of the motor, so that the electric energy is largely wasted in the form of heat loss. Therefore, in the prior art, the Various ways to improve the balance rate of the pumping unit are the key to the energy-saving technology of the pumping unit. [0003] In order to achieve the purpose of energy saving of the pumping unit, most of them are equipped with auxiliary balance, especially the auxiliary dynamic balance device of the traveling beam, on the crank, beam and other mechanisms that are consistent with the pumping movement of the polished rod, to achieve the balance of the pumping unit. Purpose. The existing commonly used auxiliary counterweig...

AI Technical Summary

Problems solved by technology

The problem is that even if the counterweight is added, because the sucker rod of the pumping unit is constantly working, the weight of the oil in the sucker rod is constantly changing, making it difficult to obtain an ideal dynamic balance

[0004] The traditional installation method of the beam auxiliary dynamic balance device of the pumping unit is to install the beam and the balance mechanism through welding and bolt fastening. It is necessary to open holes and weld on the beam, which changes the original beam The structure does not meet the requirements of not changing the structure of the pumping unit as far as possible

And once installed, it is difficult to disassemble, which brings great difficulties to the maintenance of the auxiliary balance device

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