High-efficiency composite braking mode alternating current frequency conversion winch and lowering control method thereof

Abstract

The invention discloses a high-efficiency composite braking mode alternating current frequency conversion winch. The high-efficiency composite braking mode alternating current frequency conversion winch comprises an automatic bit feed device and a PLC (Programmable Logic Controller) control system, wherein the automatic bit feed device is connected to a speed changing box which is connected to analternating current frequency conversion main motor and a drum shaft assembly respectively through a first coupler and a clutch; the drum shaft assembly is connected to an electromagnetic eddy currentbrake by a second coupler; or a drum shaft of the drum shaft assembly is in key connection with the electromagnetic eddy current brake; a hydraulic disk type brake is in key connection between the electromagnetic eddy current brake and the drum shaft assembly; the PLC control system is connected to a driller control room, a frequency convertor, a drum coder and a clutch; the driller control roomis connected to the electromagnetic eddy current brake and the hydraulic disk type brake; the frequency convertor is connected to the alternating current frequency conversion main motor; and the drumcoder is connected to the drum shaft assembly. The high-efficiency composite braking mode alternating current frequency conversion winch disclosed by the invention has three types of brakes. The invention also discloses a lowering control method of the high-efficiency composite braking mode alternating current frequency conversion winch.

Description

technical field [0001] The invention belongs to the technical field of petroleum drilling equipment, and in particular relates to a high-efficiency compound braking mode AC frequency conversion winch, and the invention also relates to a lowering control method of the high efficiency compound braking mode AC frequency conversion winch. Background technique [0002] The drawworks is one of the three major working machines of the oil drilling rig and the most important equipment in the drilling equipment. It is a mechanical transmission equipment integrating electricity, gas and hydraulic control. Casing and other operations, (2) control drilling pressure and deal with accidents during the drilling process, (3) responsible for the function of raising and lowering the derrick and base of the drilling rig. With the demand for updating and developing industrial technology and petroleum equipment, drilling winches are developing in the direction of diversified forms, large power, a...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a high-efficiency composite brake mode AC variable frequency winch, which has three kinds of brakes, and solves the problem that only relying on the energy consumption of the AC variable frequency motor to brake, the energy in the lowering process cannot be released quickly, and has a large impact on the electric control system. Troubleshooting problems

Images