Integrated hydraulic pump directly driven by slotless moving magnet type linear oscillation motor

Abstract

The invention provides an integrated hydraulic pump directly driven by a slotless moving magnet type linear oscillation motor. The integrated hydraulic pump comprises a hydraulic pump stator, a hydraulic pump rotor and a resonance spring, wherein an electromagnetic coil group in the hydraulic pump stator is coaxially and fixedly connected with two end covers; two hydraulic cylinder barrels are coaxially and fixedly connected to the outer end parts of the two end covers; two valve bodies are coaxially, hermetically and fixedly connected to the outer end parts of the two hydraulic cylinder barrels; liquid-distributing one-way valves are symmetrically mounted in through holes in the two ends of the valve bodies and the hydraulic cylinder barrels; a permanent magnet array in the hydraulic pumprotor is arranged in a Halbach array mode, attached to the outer surface of a rotor yoke in a surface-mounted mode and coaxially fixed to a driving shaft; magnetic isolating protection rings are adhered to the two ends of the rotor yoke; two piston connecting bodies are coaxially fixed with the two magnetism isolating protection rings and are respectively connected with two pistons; and resonancesprings are arranged between the pistons and the magnetism isolating protection rings in a sleeved way. The hydraulic pump stator, the hydraulic pump rotor and the resonance springs jointly form a resonance system. The integrated hydraulic pump is compact in structure and high in power density, and the working efficiency of the hydraulic pump can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of hydraulic pumps, in particular to an integrated hydraulic pump directly driven by a slotless moving magnet linear oscillating motor. Background technique [0002] Compared with the traditional swash plate plunger hydraulic pump, the electromagnetic direct drive hydraulic pump cancels the "rotary-linear" motion conversion mechanism in the middle, shortens the power transmission route, and has the advantages of simple flow adjustment method, large rated flow, and high power density. , which is convenient for high-integration integrated design and miniaturized design, and can be applied to fields such as aviation electric hydrostatic actuators, automotive metering pumps and engineering hydraulic machines with large flow, variable flow, high precision and high pressure. [0003] As the power source and drive device of the electromagnetic direct drive pump, the linear oscillatory motor directly determines the ...

AI Technical Summary

Problems solved by technology

However, with the moving coil as the driving part, the coil outlet must be arranged in a special way, which makes it difficult to achieve integrated two-way drive, which increases the difficulty of assembly of the electromagnetic direct drive pump, and mostly operates in a single-piston multi-pump drive mode.

At the same time, the moving coil built between the yoke and the permanent magnet is used as a heat source, the heat cannot be dissipated in time, and the temperature rise is obvious, which reduces the reliability and stability of the whole machine

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