32results about How to "Realize oil supply" patented technology

The invention relates to a rotary multi-way valve with pressure maintaining and shock preventing functions, and belongs to the technical field of fluid reversing valves. The technical problems that for an existing valve, a pressure maintaining function can not be achieved, operation is tedious, and misoperation is liable to be caused are solved. According to the technical scheme, the rotary multi-way valve with the pressure maintaining and shock preventing functions comprises a valve body, a valve element, a front end cover, a back end cover and a safety valve assembly and further comprises a valve element positioning sheet, a reset spring, a fastening screw and a spring base; a valve element hole is formed in the center of the valve body, a P-cavity annular groove is formed in the middle of the valve element hole, a T-cavity annular groove is formed in the end, close to the back end cover, of the valve element hole, the P-cavity annular groove communicates with an oil inlet, and the T-cavity annular groove communicates with an oil return inlet; the valve element is arranged in the valve element hole and can rotate around the axis of the valve element and axially move; two groups of inclined fluid working channels and two groups of parallel vertical fluid working channels are formed in the axial cross section of the valve body.

The invention relates to an application method of an engine test stand, which comprises the steps of S100), adjusting the pressure of a simulation chamber; S200), adjusting the intake air total pressure and oxygen content of an engine; S300), adjusting the intake air total pressure of the engine; S400), adjusting the intake air total pressure of the engine; S500), igniting the engine; S600), conducting a simulation test on an Nth simulated state point; and S700), repeating the step S600 until all simulated state points are completely tested, turning off the engine, closing an engine fuel supply flow regulating valve, an oxygen supply flow regulating valve, an engine intake air supply pressure regulating valve and an alcohol supply flow regulating valve, and then closing an ejector active air flow supply pressure regulating valve. The application method of the engine test stand is high in regulating speed, saves the regulating time of engine air intake simulation and flight attitude environment pressure simulation of the test stand, reduces the test cost and avoids the waste of energy.

The invention discloses an energy-saving control system of a garbage compression station. The energy-saving control system comprises a power source module, an oil pressure intelligent control unit andan oil temperature monitoring and pre-warning unit. The output end of the power source module is connected with the input end of the oil pressure intelligent control unit and the input end of the oiltemperature monitoring and pre-warning unit. The oil pressure intelligent control unit comprises a PLC, the input end of the PLC is connected with the output end of a switch sensor, the output end ofthe PLC is connected with the control end of an oil pressure sensor through a relay, the output end of the oil pressure sensor is connected with the input end of a data comparator through an A / D transverter, and the data comparator is in bi-directional signal connection with the PLC. According to the energy-saving control system of the garbage compression station, an electro-hydraulic directionalcontrol valve is controlled by the PLC, a vane pump can supply oil to a rodless cavity of a compression oil cylinder, pressure maintenance of the rodless cavity of the compression oil cylinder is achieved through the PLC and an overlap-type hydraulic control one-way valve, and energy saving and consumption reduction of the equipment are achieved.

The invention provides a hydraulic locking oil circuit, a construction machinery hydraulic system and a control method thereof, belonging to the technical field of construction machinery. The hydraulic locking oil circuit includes: oil inlet P, oil return T, handle hydraulic assembly and solenoid valve, the oil inlet of the handle hydraulic assembly is connected to the oil inlet P, and the oil return port of the handle hydraulic assembly is connected to the oil return T When it is turned on, the solenoid valve is set on the oil inlet passage P, and the solenoid valve is used to control the flow of hydraulic oil in the oil inlet passage P. The construction machinery hydraulic system includes the above-mentioned hydraulic locking circuit, construction machinery body, controller and locking device. The control method of the hydraulic system of construction machinery is applied to the hydraulic system of construction machinery mentioned above. The present invention can realize the effective operation of the handle to the hydraulic components of the handle by controlling the on-off of the solenoid valve, so as to avoid the occurrence of major accidents.

The invention relates to a turbofan engine control system and method based on a rapid prototype, and belongs to the technical field of engines. By means of the turbofan engine control system and method, the turbofan engine control system is established by using the universal rapid prototype, and various control functions such as engine oil supply, ignition and protection are achieved. Meanwhile, the system has good versatility, strong expandability, the short development cycle and low cost, is suitable for the rapid development of engine control systems in the early development stage, can greatly reduce the development cost and can shorten the development cycle.

The invention relates to a driving device comprising a superposition transmission (18) with a planetary gear transmission (6) and a housing (8), a main drive machine ( 1), two auxiliary drives (3.1, 3.2) connected to the planetary gear (6) via a transmission connection (9.1, 10.1, 9.2, 10.2) each, the superposition transmission can be connected with the working machine (2) connected output shaft (11), wherein the planetary gear (6) has a ring gear (6.1), a sun gear (6.2), a planetary carrier (7) and a plurality of planetary gears (6.3), wherein, in the auxiliary drive Between (3.1, 3.2) and the input shaft (4) or between the auxiliary drives (3.1, 3.2) and the output shaft (5) of the planetary gear, there is an additional transmission connection with a constant transmission ratio for each auxiliary drive , the additional transmission connection is implemented in such a way that it can be disconnected or connected via each of the switching clutches (16.1, 16.2) present, wherein the auxiliary drive (3.1, 3.2) is connected to the transmission of the superposition transmission (9.1, 10.1, 9.2, 10.2) stay connected in each case.

The invention discloses a nut drive type static pressure lead screw pair, and relates to the technical field of static pressure spiral transmission. The nut drive type static pressure lead screw paircomprises a lead screw and a static pressure nut which are mutually matched, and further comprises static pressure composite bearings arranged at the two ends of the static pressure nut. Each static pressure composite bearing comprises at least one annular oil cavity formed in the axial end portion of the static pressure composite bearing, connected with the static pressure nut and used for achieving axial supporting of the static pressure nut, an annular oil supply groove A formed in the axial end portion of the static pressure composite bearing, connected with the static pressure nut and used for supplying oil to an oil film oil supply groove, and at least three radial oil cavities which are formed in the radial direction of the static pressure composite bearing, matched with the lead screw and used for achieving radial supporting of the static pressure nut. The nut drive type static pressure lead screw pair has the beneficial effects that limitation on the feeding speed due to the lead screw shaft critical rotation speed is avoided; reasonable oil supply of the nut drive type static pressure lead screw pair is achieved, and direct connection between an oil pipe and the static pressure nut is avoided; and axial and radial static pressure supporting of the static pressure nut is achieved, and the superior performance of the static pressure lead screw pair is improved.

The invention relates to an application method of a supersonic engine test stand, which comprises the steps of S100), adjusting the pressure of a simulation chamber; S200), adjusting the intake air total pressure and oxygen content of an engine; S300), adjusting the intake air total temperature of the engine; S400), adjusting the intake air total pressure of the engine; S500), igniting the engine;S600), conducting a simulation test of an Nth simulated state point; and S700), repeating the step S600 until all simulated state points are completely tested, turning off the engine, closing an engine fuel supply flow regulating valve, an oxygen supply flow regulating valve, an engine intake air supply pressure regulating valve and an alcohol supply flow regulating valve, and then closing an ejector active air flow supply pressure regulating valve. The application method of the supersonic engine test stand realizes a ground simulation test of the supersonic engine, is high in regulating speed, saves the regulating time of engine air intake simulation and flight attitude environment pressure simulation of the test stand, reduces the test cost and avoids the waste of energy.