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 stable-pressure pilot overflow valve. The stable-pressure pilot overflow valve comprises a main valve, a pilot valve and a comparator; a system hydraulic source is respectively acted on valve elements of the main valve, the pilot valve and the comparator; and the comparator is connected with the pilot valve, and performs dynamic adjustment according to the pressure or flow change in an inlet of the overflow valve to enable the pressure acted in an inlet of the main valve to be stable and invariable in an allowed error. When the pressure and the flow in the inlet of the overflow valve are changed, through feedback of the comparator, the flow or pressure change is converted to the displacement of the valve element of the comparator, and is converted to the displacement of the valve element of the pilot valve through a pilot valve spring, so that the control valve port openness of the pilot valve is changed, and the pressure of an upper cavity of the valve element of the main valve is adjusted to cause change of a valve port of the main valve so as to enable the main valve to adapt to the inlet pressure or flow fluctuation. The valve element of the comparator adopts a slide cone valve structure; the valve element of the pilot valve adopts a slide valve structure; and the comparator spring and the pilot valve spring improve the system stability to reduce the squealing probability of the overflow valve.

The invention relates to a device for filling a container with solid particles comprising annular ducts (20, 20', 20") for the passage of the particles, delimited by a plurality of vertical tubes (16) positioned coaxially with respect to one another, and a diaphragm (22), positioned upstream of the annular ducts (20, 20', 20"), for regulating the flow rate of the particles in the annular ducts, the diaphragm (22) comprising a plurality of shutters for closing off the annular ducts, each one closing off an angular sector of a single annular duct and comprising control means for moving the closure shutters, configured in order to be able to partially close off one duct independently of the other ducts. The invention also relates to a process for closing off a filling device.

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 control valve flexible connection kit which comprises a left lug ring and a right lug ring. A groove matched with the top end of a valve rod is formed between the left lug ring and the right lug ring, and the left lug ring and the right lug ring are connected to the two ends of a large round pin in series respectively. The middle of the large round pin is provided with a small hole perpendicularly crossed with the axis of the large round pin and penetrating through the large round pin, and a small round pin connecting the large round pin and an upper seat arc shaft frame penetrates through the small hole. The upper seat arc shaft frame is sleeved with an antiskid force-evening spring capable of exerting pre-tightening force on the upper seat arc shaft frame, and the large round pin and the small round pin are surrounded by the antiskid force-evening spring. The upper end of the antiskid force-evening spring abuts against an upper seat, the lower end of the antiskid force-evening spring abuts against the left lug ring and the right lug ring, and the upper seat is provided with a head thread matched with a piston rod.

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 integrated type electro-hydraulic drive regulating valve and a control method. The integrated type electro-hydraulic drive regulating valve comprises a valve body, a valve element and a valve rod which are connected are arranged in the valve body, the valve rod is connected with a lower piston rod of a double-outlet-rod-symmetrical hydraulic cylinder through a flexible connection sleeve, and a valve position detection sensor is arranged at the top end of an upper piston rod of the double-outlet-rod-symmetrical hydraulic cylinder. In addition, an upper oil port and a lower oil port of the double-outlet-rod-symmetrical hydraulic cylinder are communicated with two oil outlets of a two-way gear pump, and the two-way gear pump is connected with a motor and driven by the motor to operate. A frequency changer is arranged on a common motor and connected with a single-chip microcomputer control unit. The integrated type electro-hydraulic drive regulating valve is small in size and light, the function of controlling the motor is achieved in the mode that the frequency changer is combined with the common motor, the good cost performance is achieved, the output pressure and the flow of an electro-hydraulic drive system can be automatically regulated along with changes of loads, the service life of the regulating valve is prolonged, long-time stable operation of the system is guaranteed, and high reliability is achieved.

The invention relates to a method for controlling a hydraulic braking system, wherein the braking system comprises a hydraulic pump driven by an electric motor for generating a volume flow of fluid for the hydraulic braking system, and the braking system comprises a solenoid valve, For controlling the volume flow of fluid from a hydraulic pump to wheel brakes, the method is characterized in that a solenoid valve is actuated so as to counteract fluid pulsations at the wheel brakes. Furthermore, the invention relates to a corresponding device.

The invention discloses a water injection packer, which belongs to the field of oil field water injection. The water injection packer includes: a water distribution mechanism and a seat unsealing mechanism. The water distribution machine includes an upper joint, a working cylinder, a water hole, a fixed water nozzle, a fixed water nozzle inner lining, a movable water nozzle outer lining, and a water nozzle outer lining collar. and the water outlet; among them, the water hole is set on the working cylinder for water to flow into other water injection packers connected with the water injection packer; the lining of the fixed water nozzle is set inside the fixed water nozzle, and the contact part of the two There is a spout, and the inner lining of the fixed spout is provided with a water outlet hole; the outer lining of the movable spout is set opposite to the inner lining of the fixed spout, and the collar of the outer lining of the spout is arranged at the lower end of the outer lining of the movable spout; The sealing mechanism is provided with a ring cavity and a liquid outlet. The water injection packer integrates the water distribution and water volume adjustment functions of the water distributor with the water injection packer, which makes the deployment process simple, improves the deployment efficiency, shortens the commissioning cycle, and can realize multi-layer subdivided water injection.

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.

The invention discloses a fuel cell water content detection device and a control method, comprising an edge transparent flow field plate, a fuel cell, a parallel light source, an illuminance sensor, a control unit, an air tank, an electric control switch valve, a regulating valve, an automatic flow rate The edge of the flow field plate of the fuel cell is made transparent through glass and adhesive, and the position of the glass corresponds to the position of the flow channel of the fuel cell. Wherein the parallel light source passes through the light-transmitting flow field plate at the edge of the fuel cell, and the light signal emitted is received by the illuminance sensor. The control unit receives signals from the illuminance sensor and the automatic flow meter. The air tank is connected with the electronically controlled on-off valve, regulating valve, automatic flow meter and fuel cell, and the control unit adjusts the electronically controlled on-off valve and regulating valve to purge the fuel cell according to the illumination sensor, automatic flow meter and fuel cell voltage signal. The method for detecting and controlling the water content of the fuel cell can accurately meet the purging requirements of the battery during the running of the automobile according to the water content.