Giant magnetostrictive hydraulic pump and working method thereof

Abstract

The invention relates to a giant magnetostrictive hydraulic pump and a working method thereof, which belong to the technical field of hydraulic control. A giant magnetostrictive electric-mechanical converter includes a base (12), an outer cover (8), an end cover (5), a precompression disc spring (16), a magnetic block (6), a cooling pipe (13), a coil former (7), a generation unit (10) for a bias magnetic field and a drive magnetic field, a giant magnetostrictive rod (9), a centre (14) and an output rod (15). A hydraulic pump head includes a pump shade (17) and a pump cover (1), as well as a plunger assembly and a valve body. According to the invention, precompression can be exerted and adjusted conveniently, so that the giant magnetostrictive rod cannot be twisted off, the valve block of the check valve is high in respond speed and low in flow resistance, and the temperature rise of the giant magnetostrictive rod can be effectively controlled.

Description

technical field [0001] The invention relates to a giant magnetostrictive hydraulic pump and a working method thereof, belonging to the technical field of hydraulic control. Background technique [0002] Rare earth giant magnetostrictive material (Ginat Magnetosrtietive Material, abbreviated as GMM) is another important new functional material after rare earth permanent magnet, rare earth magneto-optical and rare earth high temperature superconducting materials, and is known as a strategic high-tech in the 21st century. Functional Materials. It can effectively realize the reversible conversion of electromagnetic energy to mechanical energy, and has excellent properties such as large strain, fast response speed, high energy transmission density and large output force. Giant Magnetostrictive Pump (GMP for short) is a new type of hydraulic pump based on GMM. Compared with hydraulic pumps driven by other intelligent materials such as piezoelectric and electrostrictive, it has fa...

AI Technical Summary

Problems solved by technology

[0005] (1) Although the hydraulic pump considers applying pre-pressure to the GMM rod, since the magnetic block is directly placed on the top of the GMM rod, and the GMM rod is a brittle material, the friction between the disc spring and the output rod may be caused when adjusting the pre-pressure. The force will apply a certain torque to the GMM rod, which will cause the GMM rod to be easily twisted off

[0006] (2) Although the hydraulic pump also considers the use of cantilever beam passive valves to control the one-way flow of liquid, its valve plate adopts a square structure. Larger, not conducive to smooth fluid flow

[0007] (3) The hydraulic pump does not take into account the influence of the heating of the energized coil on the output performance of the pump. The heating of the coil will cause the temperature of the giant magnetostrictive rod to rise, resulting in the expansion of the rod. Excessive temperature will seriously affect the giant magnetostrictive rod. The performance of the telescopic rod, which in turn affects the performance of the pump

[0010] (1) The bias magnetic field is provided by a permanent magnet, the nonlinearity of the magnetic field is large, and the bias magnetic field cannot be adjusted;

[0011] (2) It is inconvenient to adjust the pre-pressure of the giant magnetostrictive rod

[0012] To sum up, in the existing giant magnetostrictive micropump, there are inconvenient adjustment of the axial prepressure of the GMM rod, the rod is easily twisted and the flow resistance of the passive valve plate is large, the electrified coil is seriously heated, and the temperature of the GMM rod cannot be controlled. Disadvantages such as effective control

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