4results about How to "Reduce throttling" patented technology

The invention belongs to the technical field of monorail crane oil temperature control, and particularly relates to a distributed oil temperature control system and method suitable for a monorail crane. An oil suction port of the variable hydraulic pump is connected with a hydraulic oil tank; an inlet of the high-pressure filter is connected with an oil outlet of the variable hydraulic pump; the heat dissipation part is connected to an outlet oil way of the high-pressure filter in series; the pilot control oil way comprises a pilot overflow valve group, a temperature control valve group and a shuttle valve; a P port of the pilot overflow valve group is connected with an oil outlet of the high-pressure filter, and an A port of the pilot overflow valve group is connected with an outlet of the heat dissipation part; a port P of the temperature control valve group is connected with a control oil outlet of the pilot overflow valve group, and a port T of the temperature control valve group is connected with a hydraulic oil tank and used for sensing system oil temperature; a port A of the shuttle valve is connected with an outlet of the temperature control valve set, and a port R of the shuttle valve is connected with a port X of the volume adjustable hydraulic pump. The temperature control valve set is arranged to adjust pilot control oil pressure according to oil temperature changes, the displacement of the volume adjustable hydraulic pump is controlled through the shuttle valve, and self-adaptive control over the rotating speed of the cooling fan is achieved.

This invention belongs to the field of hydraulic control technology, and particularly relates to a load-sensitive hydraulic motor speed control system based on a threaded cartridge valve integration. The system includes: a valve block with a P inlet, a T return port, an extension port, and a motor working port; the valve block internally integrates a load-sensing oil circuit, a main supply oil circuit, supply branch circuits, and a return oil branch circuit. The load-sensing oil circuit is connected to the control port of a flow priority valve. The inlet of this valve is connected to a fixed displacement pump, and its first outlet connects to each supply branch circuit via the main supply oil circuit. Its second outlet connects to an on / off valve. A differential pressure reducing valve and a two-position two-way proportional directional valve are connected in series on each supply branch circuit. The differential pressure reducing valve achieves self-compensation for the inlet and outlet pressure difference, and the outlet of the proportional directional valve connects to the hydraulic motor. A load pressure sensing check valve acquires the load pressure of each motor and feeds it back to the load-sensing oil circuit. The return oil branch circuit merges into the main return oil circuit. A safety valve and a pressure compensation relief valve are connected in parallel between the load-sensing oil circuit and the main return oil circuit, providing overload protection and system unloading functions.

The utility model relates to the technical field of valves, and discloses a high-flow low-pressure-loss valve assembly and an electromagnetic valve. The electromagnetic valve comprises a high-flow low-pressure-loss valve assembly, the high-flow low-pressure-loss valve assembly comprises a valve sleeve and a valve element arranged in the valve sleeve, a valve cavity is formed in the valve sleeve, a valve port is formed in the valve cavity, the valve element comprises a sealing head located at the end, the sealing head is located on one side of the valve port, and the sealing head is arranged in the valve cavity in a sliding mode to close or open the valve port. The inner wall of the valve cavity is provided with a sealing conical surface on the peripheral side of the valve port, the inner diameter of the sealing conical surface increases gradually in the direction close to the sealing head, the end, close to the valve port, of the sealing head is a flat end face, and the edge of the flat end face can abut against the sealing conical surface. According to the valve assembly, the sealing head of the valve element is not provided with a conical surface, the sealing conical surface is arranged at the position of the valve port of the valve sleeve, the throttling effect brought by the conical surface of the valve element is effectively reduced, meanwhile, the opening area when the valve port is opened by the sealing head is increased, and therefore larger passing flow and smaller pressure loss are obtained.

The application discloses a differential swing flowmeter, which comprises a base, a slip ring support detachably connected above the base, a stator of a slip ring fixedly connected to the upper portion of the slip ring support, an acceleration sensor fixedly arranged in the rotor of the slip ring, a throttling member fixedly connected to the rotor of the slip ring through a fixedly connected connecting rod, the throttling member being arranged below the base, and a sliding groove arranged on the base and the slip ring support and capable of allowing the connecting rod to pass through and slide with the connecting rod. The application has the advantages that the swing position of the throttling member can be detected, the corresponding flow of fluid in a pipeline can be obtained, the measurement precision is improved, and the maintenance cost is reduced; the design without a pressure tapping hole eliminates the differential pressure signal fluctuation caused by the fluid disturbance of the throttling member, and the problem of pressure introduction of the differential pressure flow sensor in the prior art in the application of the differential pressure flow sensor to the pipeline is solved.