4results about How to "Guaranteed range" patented technology

The utility model provides a reciprocating driving mechanism of an abrasion testing machine and a testing device of the reciprocating driving mechanism, two vertical inner sides of a reciprocating frame of the reciprocating driving mechanism are provided with sliding chutes, a cross-shaped motion sliding block is arranged in the sliding chutes of the reciprocating frame, and an eccentric wheel is arranged in a mounting hole in the center of the cross-shaped motion sliding block; the eccentric shaft is connected with the eccentric wheel shaft hole; reciprocating shafts are arranged on the opposite outer sides of the reciprocating frame. The testing device comprises a rack, a heating base, a linear reciprocating assembly, a testing groove, a pressure loading assembly, a testing clamp and a driving motor. The linear reciprocating assembly is simple in structure, the amplitude of the reciprocating linear motion is guaranteed through the double-eccentric structure design of the eccentric shaft and the eccentric wheel, and the test reciprocating stroke is adjustable. The reciprocating friction-wear testing machine is used for testing under a material extreme pressure condition and an oil product extreme pressure condition. The equipment is attractive in overall structural design, convenient to operate, high in automation degree, good in equipment operation stability and high in test precision, the actual working condition state of a material is simulated, and the test accuracy is improved.

The application provides a hydrogen energy power system and a hydrogen energy vehicle with the power system, the hydrogen energy power system comprises a shell, a hydrogen storage device horizontally arranged in the shell, a fuel cell stack arranged in the shell and located below the hydrogen storage device, and a heat dissipation device arranged between the hydrogen storage device and the fuel cell stack. The hydrogen energy vehicle comprises the hydrogen energy power system mounted below a vehicle frame. The hydrogen storage device and the fuel cell stack are integrated in one shell, and the heat dissipation device directly blows heat, so that the waste heat generated by the fuel cell stack is fully utilized. Compared with the prior art in which the hydrogen storage device and the fuel cell stack are separately arranged in two shells, the distance of heat transmission from the fuel cell stack to the hydrogen storage device is reduced, the loss in the transmission of waste heat is reduced, the utilization rate of waste heat is improved, and the setting of a heating film is cancelled, so that the production cost and the operation energy consumption are reduced.

The application discloses a MEMS sound wave sensor with scalar and vector composite sensing and a manufacturing method thereof, and belongs to the technical field of micro-electro-mechanical systems. The piezoelectric film, the scalar lower lead wire area and the scalar upper lead wire area constitute a piezoelectric MEMS sensor for sensing scalar sound wave information; the upper plate vector lead wire area, the upper plate, the upper plate lower insulating layer, the upper plate limiting concave frame, the upper plate anti-collision convex point, the back-shaped upper cantilever beam group, the vector lead wire area, the back-shaped lower cantilever beam group, the mass block, the support frame, the lower plate upper insulating layer, the lower plate limiting concave frame, the lower plate anti-collision convex point, the lower plate, the lower plate vector lead wire area constitute a sandwich type differential capacitance MEMS sensor for sensing vector sound wave information. The application has the advantages of scalar and vector composite sensing, small volume, large range, high sensitivity, high reliability, high integration, low cost, low noise, stable performance and the like.

This invention discloses a control method and device for a cooling system of a pure electric vehicle. The method involves determining whether the electronic expansion valve of the passenger compartment and the electronic expansion valve of the battery are malfunctioning. If both electronic expansion valves are functioning correctly, the method determines whether the electric vehicle is in fast charging mode or normal driving discharge mode. If so, it determines whether the air conditioning is on. If on, the method compares the current battery temperature with different set temperature ranges to find the corresponding range's requested battery water pump speed. It also compares the current passenger compartment air conditioning set temperature with different set temperature ranges to find the corresponding range's requested motor water pump speed. Based on the requested battery water pump speed and the requested motor water pump speed, the method determines the compressor speed. Finally, it uses the ratio of the requested motor water pump speed to the compressor speed to determine the opening degree of the passenger compartment's electronic expansion valve and the ratio of the requested battery water pump speed to the compressor speed to determine the opening degree of the battery's electronic expansion valve.