Zhejiang University

Jian Ruan

Bin Meng

Ying Chen

Wei Li

Qiang Zuo

Chengwei Tong

Chenchen Zhang

Ke Zhu

Jiahui Huang

Chuantan Ruan

Zhankai Song

Liangtao Han

A claw-pole magnetic levitation torque motor includes a stator component and a rotor component. The stator component includes an end cover, upper and lower claw poles, coil skeletons, coils, and a flux guide sleeve. The cavity formed between the upper and lower claw poles accommodates the coil skeletons, on which coils are wound. The rotor component includes a ring-shaped shell, a permanent magnet, a base, and a shaft. The shell is fitted outside the claw poles, the bottom of the shell includes a base having a base platform shoulder, in the center of which a blind hole is opened. The lower end of the shaft is fixedly arranged in the blind hole, and the upper end of the shaft passes through the flux guide sleeve. The stator component is assembled with the rotor component through a gap-fitting between the magnetic guide sleeve and the shaft of the rotor component.

Claw-pole magnetic levitation torque motor

A shaft-distributed double-acting roller piston pump includes a front end cover, a pump casing, a rear end cover and a pump core assembly. The pump core assembly includes a guide rail assembly including left and right guide rails arranged back to back. The side surfaces of the left and right guide rails away from each other are space cam curved surfaces. A flow distribution shaft is installed in the center of the guide rail assembly. A cylinder assembly is installed on both sides of the guide rail assembly including left and right cylinders, between which a piston assembly is arranged. The piston assembly forms left and right closed cavities with the left and right cylinders respectively. The piston assembly performs axial reciprocating linear motion under the constraint of the cylinder assembly and the guide rail assembly, and the volumes of the left and right closed cavities change continuously.

Shaft-distributed double-acting roller piston pump

A pre-tensioning-pre-twisting full-bridge 2D electro-hydraulic proportional directional valve can include a 2D valve, linear electro-mechanical converters at two ends of the 2D valve, and a compression-torsion coupling between the linear electro-mechanical converters. The 2D valve can include a valve core and a valve body, wherein the valve core is rotatably and axially slidably disposed inside an inner hole that is set along the axis line of the valve body. Each end shoulder of the valve core is provided with a pair of high pressure holes and low pressure holes, which are respectively communicated with a P opening and a T opening through an inner hole of the valve core.

Pre-tensioning-pre-twisting full-bridge 2D electro-hydraulic proportional directional valve

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Zhejiang, China

Jian Ruan