Beam-pumping unit crank position detection system and method

Abstract

The invention belongs to the field of oil pumping unit crank position detection, and particularly relates to a beam-pumping unit crank position detection system and method, and the system comprises a position signal detection processing unit, and a first position sensor, a second position sensor and a crank position sensor which are connected with the position signal detection processing unit; the first position sensor is arranged at a reduction gearbox of the oil pumping unit; the second position sensor is arranged on a belt pulley on a motor main shaft for controlling the pumping unit walking beam to swing; the crank position sensor is fixedly arranged on a crank bracket of the oil pumping unit; and the position signal detection processing unit is used for receiving and processing the reduction gearbox belt pulley position signal pulse, the motor main shaft belt pulley position signal pulse and the crank position pulse signal of the first position sensor, the second position sensor and the crank position sensor, and obtaining oil pumping unit belt fault pre-diagnosis information. According to the position sensor, a split structure is adopted, and the current crank position information can be detected more quickly on the premise that equipment is slightly modified.

Description

technical field [0001] The invention belongs to the field of crank position detection of pumping units, in particular to a crank position detection system and method of a beam-type pumping unit. Background technique [0002] The conventional position encoders used in oil fields are mostly integrated photoelectric position detection encoders, and a small part of integrated resolver position detection encoders. Generally, integrated encoders have higher requirements on installation technology and installation position. And its unit price is expensive and it is not suitable for large-scale use. At present, most of the existing oilfield pumping units in China are already in the state of mass production of crude oil. To install a conventional encoder to detect its position requires a certain degree of transformation of the physical structure of the original pumping unit to meet the needs of encoder installation. The material cost and personnel cost of the pumping unit are relati...

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Problems solved by technology

[0002] Most of the conventional position encoders used in oil fields are integrated photoelectric position detection encoders, and a small part are integrated resolver position detection encoders. In general, integrated encoders have high requirements for installation process and installation position. And its expensive unit price is not suitable for large-area and large-scale use

At present, most of the existing domestic oilfield pumping units are already in the state of mass production of crude oil. The installation of conventional encoders for position detection requires a certain degree of modification of the physical structure of the original pumping units to meet the needs of encoder installation. The material cost and personnel cost of the pumping unit are relatively high, and the transformation effect is not high

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