31results about How to "Realize stepless control" patented technology

The invention relates to a pressure control valve, in particular to a magnetorheological pressure control valve for achieving hydraulic system pressure control through a force required to start the control valve. The pressure control valve comprises an inner valve body, a valve core, a blanking cap, a main valve body, a working chamber containing magnetorheological fluid, a coil assembly composed of a coil and a magnet separation jacket, an outer valve body, an upper valve body, a thrust shaft, a spring seat, a reset spring, an end cap, a travel switch sensor and a plurality of rubber seal rings. The magnetorheological pressure control valve is simple in structure, convenient to manufacture, high in energy efficiency and quick in pressure response and stepless and intelligent control of system pressure can be achieved.

An oil pressure warning sensor for a pressure sensitive capacitor relates to a sensor, which comprises a telescoping oil tank main element, an oil tank telescoping component arranged in the telescoping oil tank main element, and a casing cooperating with the telescoping oil tank main element to close the oil tank telescoping component in the telescoping oil tank main element, wherein the telescoping oil tank main element comprises an iron-bottomed bowl and screws in sealed fit with through holes reserved at the bottom of the iron-bottomed bowl; the oil tank telescoping component comprises a sealing washer, a waveform return spring plate, a knurled spring plate, a sliding sleeve, a movable electrode plate, a return spring, a double-sided circuit board and a circuit board retaining snap ring, which are arranged in the iron-bottomed bowl in turn; a fixed electrode plate is arranged on one side, close to the movable electrode plate, of the double-sided circuit board; the movable electrode plate and the fixed electrode plate form a capacitor with variable capacitance; upon receiving the pressure from the engine oil, the waveform return spring leaf and the knurled spring leaf deform and drive the movable electrode plate to compress and deform the return spring so as to change the distance between the movable electrode plate and the fixed electrode plate to change the capacitance of the capacitor; and the oil pressure warning sensor for the pressure sensitive capacitor is further provided with a control circuit connected with the capacitor and used for converting the variation of oil pressure into an electrical signal and transmitting the electric signal to an oil instrument.

The invention discloses a double-cylinder eccentric rotary pump. The double-cylinder eccentric rotary pump comprises a first cylinder body and a second cylinder body. The first cylinder body and the second cylinder body are each internally provided with a cavity. The outer end surface of the first cylinder body and the outer end surface of the second cylinder body are each provided with inlets and outlets. The cavity of the first cylinder body and the cavity of the second cylinder body are internally provided with a first rotor and a second rotor correspondingly. Working cavities are formed between the side surface of the first rotor and the cavity of the first cylinder body as well as between the side surface of the second rotor and the cavity of the second cylinder body correspondingly. The first rotor and the second rotor are installed on a first eccentric part and a second eccentric part of the same crankshaft in a sleeving mode correspondingly so that the working cavities can be increased or decreased and the inlets can communicate with the outlets. The first rotor is in clearance fit with the crankshaft, and the second rotor is in clearance fit with the crankshaft. Fixed gears are fixed to the first cylinder body and the second cylinder body. Teeth or gear rings matched with the fixed gears are arranged in the middle of the first rotor and the middle of the second rotor. The double-cylinder eccentric rotary pump is high in efficiency, user-friendly, convenient to transport, easy to maintain and capable of achieving real-time monitoring and stepless speed adjusting.

The invention provides a slide value type hydraulic valve with a differential motion function. The slide value type hydraulic valve comprises a valve body and a valve element which is arranged in a valve body hole; a first undercutting groove, a second undercutting groove, an oil inlet undercutting groove, a third undercutting groove and a fourth undercutting groove are arranged in the valve body hole in sequence, wherein the first undercutting groove and the fourth undercutting groove are communicated with an oil return opening, the second undercutting groove and the third undercutting groove are communicated with a working oil port respectively, and an oil inlet undercutting groove is communicated with an oil inlet; the valve element comprises a left circular bead, a left shaft neck, a middle circular bead, a right shaft neck and a right circular bead from left to right; a circular groove, a first valve port and a second valve port are arranged on the excircle of the left part of the middle circular bead, wherein the first valve port and the second valve port are not communicated with each other; a third valve port and a fourth valve port which are communicated with the right shaft neck are arranged on the excircle of the right part of the middle circular bead and the excircle of the left part of the right circular bead respectively. The slide value type hydraulic valve realizes differential motion function through improving the structure of a main valve element of the hydraulic valve, the integral structure is changed little, so as to reduce the product cost and failure rate of the product; the differential motion function is realized, and stepless control of flow can be realized at the same time.

A permanent magnet retarder, with a bracket, a stator, a rotor drum and a drive shaft; the stator has an end plate and an inner ring cage and an outer ring cage fixed on the end plate, and the rotor drum has an end plate And the shaft sleeve, inner ring body and outer casing fixed on the end plate; the transmission shaft is fixedly connected with the shaft sleeve of the rotor drum, and two symmetrically distributed fixing seats are fixed on the outer surface of the end plate of the stator, each fixing seat A push-pull rod is connected to the top of the bracket, and an electric push rod is fixed on one of the fixed seats on the top plate of the bracket, and the electric push rod is connected with the corresponding push-pull rod; The outer ring cage of the stator can be inserted into the annular cavity between the inner ring body and the outer shell of the rotor drum. The electric push rod of the present invention controls the overlapping degree of the stator and the rotor drum, that is, it can realize the stepless control of the permanent magnet retarder, and the multi-layer overlapping of the stator and the rotor can greatly increase the braking torque.

The invention relates to a magnetorheological pressure control valve. The control valve includes a valve cover, a coil assembly 2, an upper valve body, a lower valve body, a lower valve core, the first and second rubber sealing rings, a working chamber, an upper valve, a return spring, an adjusting nut, and the valve cover is fixed to the lower valve body. Connected to the upper and outer sides of the lower valve body; the upper valve body and the adjustment nut are connected to the inner side of the upper valve body, and a return spring in a compressed state is provided under the adjustment nut, and the lower part of the return spring is pressed above the upper valve core, and the upper valve core is set on the Inside the upper valve body; the lower part of the upper valve core presses the upper end of the disc above the lower valve core, the lower valve core is set in the lower valve body, and the lower part of the lower valve core presses on the upper side of the oil inlet of the lower valve body; the upper valve body and A working chamber is formed between the lower valve bodies, the coil assembly is arranged in the groove of the upper valve body, and the upper side of the coil assembly is in contact with the inner side of the valve cover. In the present invention, the coil assembly is arranged on the upper side of the working chamber, away from the magneto-rheological fluid, so that the influence of the heating of the electromagnetic coil on the magnetorheological fluid is smaller, and the heat dissipation effect of the magnetorheological fluid is better.

The invention discloses a prosthetic penis controlled by a micro electric pump. The prosthetic penis comprises a penis prosthesis which can be implanted in a penis, a communication unit, a control unit and a sensing unit, wherein the penis prosthesis comprises a penis prosthesis main body, a liquid storage bag and the micro electric pump; the communication unit and the sensing unit are connected to the control unit; the control unit is connected to the micro electric pump; the micro electric pump and the liquid storage bag are communicated; the communication unit is used for receiving an erection order which is distributed by an intelligent terminal; the control unit is used for controlling the micro electric pump to press liquid in the liquid storage bag into the penis prosthesis main body, so that erection of the penis prosthesis is achieved; the sensing unit is used for detecting an ejaculation process of the penis prosthesis; and after the control unit detects the ejaculation process by virtue of the sensing unit, the control unit is additionally used for controlling the micro electric pump to pump the liquid in the penis prosthesis main body back into the liquid storage bag, so that the penis prosthesis becomes soft.

The invention discloses a frequency control method and system. The method comprises the following steps: acquiring the water inlet temperature of a unit in real time, and calculating the compressor target frequency and the fan target frequency of the unit based on a preset function relation among the compressor frequency, the fan frequency and the water inlet temperature respectively; subsequently performing corresponding adjustment on the compressor frequency and the fan frequency according to the calculated target frequency values. Through preset research and setting of the function relation between the frequency of the unit and the water inlet temperature, reasonable matching of the frequency adjustment of the unit and the change of the water inlet temperature is realized, the unit can always correspond to an appropriate frequency value at different water inlet temperatures, the problem of great frequency difference in case of cross-regional change of the water inlet temperature and the problem that the frequency does not change along with the change of the water inlet temperature in case of non-cross-regional change in the conventional sectional control way are solved, reasonable adjustment of the frequency of the unit is realized, optimal energy efficiency of the unit can be brought into full play in real time, and the running stability and reliability of the unit are enhanced.

The invention relates to a flow control valve, in particular to a magnetorheological flow control valve which realizes flow control through the opening degree of the control valve. The flow control valve comprises a jump ring, an upper end cover, an upper valve body, a lower valve body, a coil, a lower thrust spring, a valve core, a thrust shaft, an inner valve body, a working cavity, a magnetic isolation sleeve, a spring seat, an upper thrust spring, a seal bolt and a plurality of rubber seal rings; and according to the magnetorheological flow control valve, the shifting position of the valve core is controlled through a technical method in which the magnetic field intensity which acts on magnetorheological fluid in the working cavity formed between the magnetic isolation sleeve and the upper valve body is controlled, so that the magnetorheological fluid yield strength is affected and the action force of magnetorheological fluid to the thrust shaft is controlled, so that different circulation areas are obtained and the the control over the fluid flow is realized.

The invention discloses a DC fan motor control circuit and a control method of using the same. The control circuit comprises a temperature detection module, a master control unit and a voltage control module, wherein the temperature detection module is used for detecting a temperature related to a working speed of a DC fan motor and forming a temperature signal; the master control unit is connected with the temperature detection module and is used for receiving a temperature signal output by the temperature detection module and outputting a pulse width modulation signal with a corresponding duty ratio according to the temperature signal; and the voltage control module is electrically connected with the DC fan motor and is used for controlling the voltage of the DC fan motor according to the duty ratio of the pulse width modulation signal. The pulse width modulation signal is introduced and the duty ratio of the pulse width modulation signal is controlled to change according to a temperature change, so that high-accuracy adjustment is carried out on the rotating speed of the DC fan motor through the pulse width modulation signal.

The invention discloses a control method for steplessly adjusting operation of a high power water pump or a fan. A controller controls a frequency converter, and the frequency converter controls a motor; and controlled working modes are manually or automatically switched according to values of the power of the motor and the power of the frequency converter. According to the control method disclosed by the invention, the frequency converter with the capacity which is 1 / 2 of the capacity of the motor is adopted to control the motor of the pump or the fan to be started, so as to realize stepless control over the rated flow of about 0 to 80 percent, and the full-load operation requirement under a special condition is met. The low capacity frequency converter controls the high power motor, thus reducing the surplus of use of the frequency converter, saving energy and decreasing the equipment investment; impact on a power grid is reduced; meanwhile, the impact influence on a water pump impeller, a pump shaft and a bearing can be reduced to the maximum extent, the service lives of equipment and valves are prolonged, and the maintenance cost of equipment pipes is saved; by stepless adjustment of the water amount and the air volume, production operation parameters can be precisely controlled, and the engineering requirement can be met; and multiple interfaces can be connected with a computer and a network to realize intelligent control.

The invention discloses a double-acting magneto-rheological pressure and flow control valve which comprises an upper end cover and a lower end cover. The upper end cover and the lower end cover are arranged in a longitudinal symmetry manner, and a thrust shaft is slidably connected into a cavity formed between the upper end cover and the lower end cover; two cavities are formed in rooms among two ends of the thrust shaft, the upper end cover and the lower end cover, and an upper flow control cavity and a lower flow control cavity are respectively mounted in the two cavities; the upper end cover is fixed to the lower end cover by a piston, an upper auxiliary damping hole and a lower auxiliary damping hole are respectively machined on the upper end cover and the lower end cover, and an auxiliary channel which is communicated with the damping holes is arranged in an inner ring of the piston; and the opening of the auxiliary channel is determined by the sliding stroke of the thrust shaft. The double-acting magneto-rheological pressure and flow control valve has the advantages of high response speed and extremely wide bearing pressure range owing to fast yield strength variation response and wide range of magneto-rheological fluid. Besides, the double-acting magneto-rheological pressure and flow control valve is simple and compact in structure, convenient to manufacture and high in portability, and can be connected into an electronic control unit, so that a bidirectional flow can be intelligently and steplessly controlled.

The invention discloses a four-wheel drive electric automobile steering stability control method. When a vehicle is judged to be turned, the yaw moment offset is calculated; and when it is judged that the steering is insufficient, inner-side front wheels and rear wheels inside are controlled to perform braking energy recovery to generate a yaw moment; if the braking yaw moment is larger than or equal to the yaw moment offset, the inner-side front wheels are controlled to perform braking energy recovery, and when the maximum charging condition of the inner-side front wheel energy is reached, the inner-side rear wheels are controlled to perform braking energy recovery until the yaw moment offset is eliminated; and if the braking yaw moment is smaller than the yaw moment offset, the inner-side front and rear wheel brake energy is controlled to recover and increase the outer side front, the rear wheels drive the torque, and the target slip rate is used as a control object to coordinate the output of the torque, and the deflection amount of the yaw moment is eliminated; and when it is judged that the steering is over, the front wheels and the rear wheels outside are controlled to perform braking energy recovery, and the control strategy and the steering insufficiency are the same. Torque control can be performed on each wheel, and stability and robustness of control are improved.