Parallel type power system of rotary drilling rig

Abstract

The invention discloses a parallel type power system of a rotary drilling rig. The parallel type power system comprises an engine, a transfer case, a master controller, an energy storage unit, a motor driving subsystem and a hydraulic driving subsystem, wherein the motor driving subsystem is connected with a first output shaft of the transfer case, is used for providing power for a main winch, and comprises a generator, a motor control unit, a motor and a speed reducer; and the hydraulic driving subsystem is connected with a second output shaft of the transfer case, is used for providing power for other working devices, and comprises a main pump, an auxiliary pump, a main hydraulic system and an auxiliary hydraulic system. The power system can reversely drag the motor to generate electricity when a drill rod is lowered, and feeds back electric energy to the generator and the energy storage unit to provide a part of power for the engine in an auxiliary manner; and meanwhile, when the engine runs lightly, the generator is used for generating electricity, so that the engine works in a fuel economy area, and the purpose of energy conservation is achieved.

Description

technical field [0001] The invention belongs to the field of construction machinery, and in particular relates to a parallel power system of a rotary drilling rig. Background technique [0002] Rotary drilling rig is a kind of pile construction machinery, which has been more and more widely used due to its excellent performance in the construction of various large pile foundations. However, with the increasingly fierce market competition, the problems of high fuel consumption and poor emissions have attracted people's attention. [0003] During the rotary excavation operation, the main hoist is lowered very frequently, releasing a large amount of gravitational potential energy. In the prior art, the main hoist system basically adopts an open circuit hydraulic drive system, and the energy is basically consumed in the balance The throttling loss of the valve not only wastes energy, increases the thermal load of the system, but also reduces the service life of hydraulic compon...

AI Technical Summary

Problems solved by technology

[0004] In the patent CN102155160A "A Hybrid Rotary Drilling Rig", the engine, the generator, and the main pump are installed in series, and the auxiliary pump is independently driven by the motor. The hybrid power system formed has the function of energy recovery and reuse. However, the structure installed in series is axial The length is generally long, which is not conducive to the reliability of the generator shaft and main pump shaft due to the severe vibration of the rotary drilling rig; the power of the auxiliary hydraulic system passes through the generator, motor, and auxiliary pump, and there are many energy conversion links , there is energy loss; the main hoisting mechanism contains a clutch, and the structure is complex

In the patent CN211924055U "Hybrid Power System and Hybrid Rotary Drilling Rig for Construction Machinery", the engine, generator, and main pump are installed in series, which also has reliability problems, and the power head is driven by a motor, and the impact force at the moment of starting is not as good as that driven by a hydraulic motor. , leading to poor soil throwing performance of the power head, and additional construction time

Images