30results about How to "Change the opening" patented technology

The invention discloses a magnetorheological valve control damping stepless adjustable shock absorber. The shock absorber is composed of a magnetorheological valve control unit and a hydraulic unit, and the magnetorheological valve control unit is internally provided with a piston rod which is a hollow rod body; a plunger rod sleeved in the piston rod can be axially moved in the hollow rod body; the tail end of the plunger rod is fixedly connected to a support part arranged in a magnetorheological elastomer; the open area of a flow hole in the side wall of the piston rod is changed through movement of the plunger rod, namely that the opening degree of a variable valve hole is changed; and coils are arranged and used for providing a closed magnetic field for controlling the rigidity of themagnetorheological elastomer. According to the shock absorber, the opening degree of the variable valve hole is controlled through change of the rigidity of the magnetorheological elastomer, and the output of real-time stepless controllable damping force is achieved.

The invention relates to a device for filling a container with solid particles, the device having annular ducts for passing particles, which ducts are defined by a plurality of vertical nozzles arranged coaxially relative to one another, and a diaphragm arranged upstream from the annular ducts for regulating the flow rate of particles in the annular ducts, the diaphragm has a plurality of shutter flaps for shutting off the annular ducts, each flap shutting off an angular sector of a single annular duct and the diaphragm having control means for controlling movement of the shutter flaps that are configured to be capable of partially shutting off any one of duct independently of the other ducts. The invention also relates to a method of shutting off a filler device.

The invention discloses a primary frequency modulation composite control system of a coal-fired unit, comprising a condensate regulating valve, an electric aperture type throttle orifice plate, a throttle orifice control device, and an integrated master control device; the electric aperture type throttle orifice plate is installed correspondingly Between the extraction port of the low-pressure cylinder and one or more of the low-pressure heaters, it is used to adjust the flow of low-pressure extraction steam entering one or more of the low-pressure heaters according to the control instructions sent by the throttle orifice control device; when When the power grid frequency fluctuation difference is greater than the preset difference threshold, the integrated master control device simultaneously activates the condensate regulating valve and the throttle orifice control device to adjust the condensate flow and low-pressure extraction flow entering the low-pressure heater respectively until the power grid frequency return to stability. The invention solves the problem of relatively slow load in the existing condensed water throttling technology through the combination of condensed water throttling and low-load steam extraction throttling, and improves the stability and reliability of the heater at the same time.

The invention discloses an exhaust structure of a compressor and the compressor. The exhaust structure of the compressor comprises a flange. An exhaust passageway is arranged on the flange. A valve block is arranged in the exhaust passageway and can at least move under the effect of the gas pressure in the exhaust passageway so that the opening degree of the exhaust passageway can be changed. According to the exhaust structure of the compressor, the valve block is arranged on the exhaust passageway and can move under the effect of the gas pressure in the exhaust passageway so that the opening degree of the exhaust passageway can be changed; when gas flow is large, the opening degree is increased, and therefore the flowing speed of gas can be decreased, and noise can be improved; and when the gas flow is small, the opening degree is decreased, and therefore the flowing speed of the gas is increased, and the energy efficiency of the compressor is improved.

The present application relates to the field of space propulsion technology, in particular to a liquid oxygen kerosene needle injector. The liquid oxygen kerosene pintle injector includes a shell, an adjustment cylinder and a center rod; the adjustment cylinder is sleeved outside the center rod, and the first liquid injection outlet is formed between the adjustment cylinder and the center rod, and the kerosene flows into the first liquid injection outlet through the first liquid injection outlet. Combustion chamber; the casing is set outside the regulating cylinder, and the second liquid spray outlet is formed between the casing and the regulating cylinder, and the liquid oxygen flows into the combustion chamber through the second liquid spray outlet; the central rod is connected with the casing, and the regulating cylinder can be relatively The central rod and the housing move axially so that the cross-sectional areas of the first liquid spray outlet and the second liquid spray outlet change synchronously. In the liquid oxygen kerosene pintle injector provided by this application, when the adjustment cylinder moves, the cross-sectional areas of the first liquid injection outlet and the second liquid injection outlet change synchronously, and the momentum of the injected kerosene and liquid oxygen can be changed synchronously, thereby It can keep the momentum ratio at the best state during the thrust change, thus improving the injection performance.