订阅最新相关文献

A hydraulic system of a power transmission has a reservoir (2), a pump (3) and, downstream of the latter, a junction point (20), from which a first and a second branch (8,18) start; the first branch (8) is configured to perform a cooling and/or lubricating function on a part (9) of the transmission; the second branch performs an actuating function by means of a hydraulic actuator (23); the system further has a first and a second control valve (21) arranged along the first and the second branch (8,18), respectively, and are equal to each other; each of them has a first port (P) connected to the junction point (20), a second port (T) connected to the reservoir (2), and a third port (A); the latter, in the first control valve (21), supplies the part (9) to be cooled/lubricated and, in the second control valve (31), communicates with a chamber (28) of the hydraulic actuator (23) for pressurizing such chamber (28); each of the two valves has a selector body (33) which is movable, in response to an electrical control signal, between a first position, in which the first port (P) communicates with the third port (A), and at least a second position, in which the first port (P) is closed, whereas the second port (T) communicates with the third port (A).

本实用新型涉及活塞杆技术领域，公开了一种级差式活塞杆，包括活塞杆，所述活塞杆包括活塞一、支承环一、活塞环一、螺柱、螺母、制动垫、法兰、凹球面垫一、凸球面垫一、调整套、凹球面垫二、凸球面垫二、支承环二、活塞环二、键一、活塞二、活塞三、键二。本实用新型中，通过在级差式活塞连接内部设置凹球面垫二、凸球面垫二等球面配合结构，在支承环或气缸磨损时可自动补偿间隙，有效避免活塞杆承受过大弯曲应力而提前疲劳断裂；同时，装配时对球面部件的研磨、润滑油脂涂覆以及活塞一端面间隙的精准控制，使活塞一具备可靠的自动调正与灵活运动性能，制动垫和活塞二的翻边铆死设计也增强了结构防松能力。

The provided is a highly stable and controllable test device and method for low-speed stability of a hydraulic rotary actuator. The test device includes a mechanical system, a hydraulic system, and an electrical system, where the mechanical system includes a rack, a winch, a twisted rope, and the like; the hydraulic system includes a hydraulic cylinder, a tested component, a fixed-displacement radial piston pump, and the like; and the electrical system includes a load feedback system and a flow rate feedback system. According to the test device, while the highly controllable hydraulic winch based on the hydraulic cylinder is designed to provide the stable loading torque, a proportional servo-hydraulic system is established. The two-stage flow rate controller can greatly improve the stability of the loading torque and the input flow rate.

流体压致动器具备：筒状的管（24），其根据流体的压力而膨胀及收缩；套管（26），其覆盖管（24）的外周面；一对密封构件，其将管端部密封；长条的约束构件（28），其在管（24）的径向的外侧且是套管（26）的径向的内侧从轴向（S）的一侧向另一侧伸出配置，能够抵抗轴向（S）上的压缩且在与轴向（S）交叉的交叉方向上弯曲；以及固定构件（36），其在与约束构件（28）的一端部即约束端部（29）对应的位置从套管（26）的外侧向插入部（32B）固定套管（26）和约束构件（28），约束端部（29）在插入部（32B）在比弯曲前的管（24）的未插入到插入部（32B）的部分所对应的外表面靠径向外侧的位置固定于管（24）的外表面。

本实用新型公开了一种数字流量阀，包括阀体，阀体上设置有减压阀体，减压阀体与阀体之间设置有进油管路和出油管路，进油管路内通过左侧的减压阀套设置有减压阀芯，减压阀套的端部设置有堵盖，减压阀芯的右端设置有减压弹簧；所述阀体内设置有卸油管路，卸油管路上通过节流阀阀套设置有节流阀阀芯，节流阀阀套的外端通过节流阀压盖设置有节流阀弹簧，节流阀阀芯的后端通过传动螺母设置有传动丝杠，阀体上通过托架设置有步进电机；所述减压阀体上设置有连通进油管路的进油口，阀体上设置有分别连通出油管路和卸油管路的出油口和卸油口。本实用新型保证了进油管路压力的稳定性，还保证了出油管路压力的稳定性，进而保证了出油口的出油量。

ACCUMULATOR SYSTEM. This is an accumulator system that includes a housing. The housing defines a function chamber and a balance chamber. A piston moves axially within the housing. The piston separates the function chamber from the balance chamber. An electric actuator engages with and drives the piston within the housing to compress and drive a first fluid out of the function chamber.