Oil pump and oil cylinder integrated device driven by alternating current servo motor

Abstract

An oil pump and oil cylinder integrated device driven by an alternating current servo motor comprises a hydraulic cylinder barrel. The middle portion of the hydraulic cylinder barrel is provided witha piston ring. The interior of the piston ring is connected with a bi-directional duplex inside engaged gear motor pump. Two output ends of the bi-directional duplex inside engaged gear motor pump areconnected with a first piston rod and a second piston rod correspondingly. The first piston rod and the second piston rod are connected with the piston ring. The first piston rod, the second piston rod and the piston ring communicate with one another through an oil path. The piston ring moves on the inner wall of the cylinder barrel after being sealed through a combined seal ring and guided by aguide belt. According to the oil pump and oil cylinder integrated device driven by the alternating current servo motor, the alternating current servo motor, the inside engaged gear pump and an air oilcylinder are integrated to achieve hydraulic output, the integrated structure is compact, the integration level is high, control is easy, and the efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of electro-hydraulic propulsion systems, and in particular relates to an integrated device of an oil pump and an oil cylinder driven by an AC servo motor. Background technique [0002] At present, the common hydraulic system includes electric motor, hydraulic pump, hydraulic cylinder, and hydraulic oil circuit. The motor and hydraulic pump are connected by a coupling. The connection of the coupling can easily cause the motor shaft and the pump shaft to be misaligned. Large noise can even cause damage to the pump. At the same time, the motor, oil pump and oil cylinder are mainly arranged in a completely separate arrangement, which has the disadvantages of complex structure, low energy utilization rate, high noise, high production cost, and inconvenient installation and use. [0003] The rapid development of hydraulic presses has greatly promoted the development of the equipment manufacturing industry. Especi...

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Problems solved by technology

[0002] At present, the common hydraulic system includes motor, hydraulic pump, hydraulic cylinder, and hydraulic oil circuit. The motor and the hydraulic pump are connected through a coupling. The connection through the coupling will easily cause the motor shaft and the pump shaft to be out of center, and it is easy to cause serious problems. Loud noise may even cause damage to the pump. At the same time, the motor, oil pump, and oil cylinder are mainly arranged separately, which has the disadvantages of complex structure, low energy utilization rate, high noise, high production cost, and inconvenient installation and use.

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