摘要:
A vane pump (101) for an automatic transmission includes a suction-side behind-vane pressure duct (112) and a pressure-side behind-vane pressure duct (111). The suction-side behind-vane pressure duct (112) is connected to the pressure side (116) of the vane pump (1). A valve device (113, 114) is connected to the pressure-side behind-vane pressure duct (111). During operation of the vane pump (101), a pressure-side behind-vane pressure (p DH) can be set in the pressure-side behind-vane pressure duct (111) with the valve device (113, 114).
摘要:
The invention relates to a pump system comprising a positive-displacement pump module, preferably a screw pump, a drive module which can be exchanged separately from the positive-displacement pump module, said drive module comprises an electric drive motor and a frequency converter associated therewith for controlling or adjusting a drive motor speed, control means comprising a controller for producing an adjustment variable (Ys) for the frequency converter in accordance with a reference variable (W) and a first actual operational parameter (X) and logistic means associated with the controller, and reference variable defining means for providing the reference variable (W) for the control means. According to the invention, the control means are provided in a control module separately from the drive module, and the drive module can be exchanged separately from the control module, and the drive module does not have a designed and/or controlled controller for producing the adjustment variable (Ys).
摘要:
A beverage syrup pump system is disclosed including a pump housing having an internal pumping chamber, a pump motor, and a pumping mechanism driven by the motor within the pumping chamber. The pumping mechanism receives a syrup fluid at a first pressure and discharges the fluid at a second pressure which is greater than the first pressure. A pressure transducer adjacent a sensor port and in contact with a quantity of the fluid at the second pressure generates an electrical signal based upon the second pressure. A programmable micro controller receives the electrical signal from the pressure transducer and is capable of starting and stopping the pump motor. The micro controller will immediately stop the pump motor if the second pressure exceeds a predetermined maximum pressure level. The micro controller will also stop the pump motor if the second pressure falls and remains below a predetermined minimum pressure level for a predetermined first time interval.
摘要:
A pump having a stroke ring which has an axial recess, a rotor which is received in the axial recess so as to be rotatable relative to the stroke ring, wherein the rotor has radial recesses in which delivery elements are displaceable received as viewed in a radial direction, a side plate which closes off the axial recess on a first side, a pressure plate which closes off the axial recess on a second side, wherein the pressure plate has at least one opening, wherein a pressure region of the pump is fluidically connected to external surroundings of the pressure plate through the at least one opening, and wherein at least one fluid path is provided from the pressure region of the pup into an under-vane region of the delivery elements, and a cold-start plate which is preloaded against the pressure plate by means of a spring element such that, at least when the pump is at a stand-still, the cold-start plate closes the at least one opening in the pressure plate to the external surroundings of the pressure plate. The pump is characterized in that the spring element is supported on the pressure plate so as to introduce preload forces into the cold-start plate, and in that the spring element is fastened to the pressure plate.
摘要:
The invention relates to a positive displacement pump, including a pot-shaped housing, a rotor rotatably supported in the housing, and at least one blade movably guided in the rotor, the blade tip of which contacts the inner circumferential wall of the housing and divides the interior into chambers, wherein a locking mechanism that inhibits or brakes the movement of the blade in the rotor is provided.
摘要:
A vehicle hydraulic device is provided with an electric motor-driven oil pump and a shuttle valve, so that a vane pump operates smoothly, even at the start, with a backpressure applied from the electric motor-driven oil pump to the vanes. Even when the oil pressure of a working fluid discharged from the vane pump exceeds the backpressure inside vane housing grooves, the working fluid flows from a vane pump discharge oil passage to a backpressure oil passage, so that the vanes are not pushed into the housing grooves. Thus, it is possible to reduce the fluctuations in discharge amount of the vane pump due to fluctuations in oil pressure of the vane pump discharge oil passage during operation of the vane pump.
摘要:
An automotive fuel pump is disclosed. There is a pump head that can operate in a passive mode and, when an electric motor powers spur gears, an active mode. The pump head can direct fuel to an air separator, then to a water trap, then to an air separator. After which the fuel is sent to the engine and any separated air and excess fuel is returned to the fuel tank.
摘要:
An operational control device is disclosed for a positive-displacement pump having a motor, means for actuating the motor, state sensor means for detecting an actual operating parameter (e.g., pressure) of the pump, and operating mode means for controlling an operating mode of the pump. A first actuating mode of the operating mode means is set by the actuating means below a first operating-parameter threshold value (P1). This mode brings about a constantly rising pump pressure in the direction of an operating-parameter setpoint value (Pset) in a variable manner, which is dependent on a detected change in the operating parameter over a predefined time interval. A second actuating mode is set as normal operation to the operating-parameter setpoint value by the actuating means above the first operating-parameter threshold value. P1 is fixed or is calculated as a fraction of the operating-parameter setpoint value and/or a pump parameter correlated therewith.
摘要:
Techniques for stethoscope sanitation are disclosed. In one particular embodiment, the techniques may be realized as a system for stethoscope sanitation including a first dispensing nozzle positioned to dispense a sanitization fluid on a first surface of a stethoscope, a second dispensing nozzle positioned to dispense the sanitization fluid on a second surface of a stethoscope, a first sensor configured to detect the presence of the stethoscope within a close proximity of the first dispensing nozzle and to detect the presence of the stethoscope within a close proximity of the second dispensing nozzle, and a pump configured to receive the sanitization fluid from a sanitization fluid receptacle and to provide the sanitization fluid to the first dispensing nozzle and the second dispensing nozzle. The techniques may include a microcontroller configured to receive a signal from the first sensor and initiating pumping in response to reception of the signal.
摘要:
Techniques for providing a secondary path for sanitization fluid are disclosed. In one particular embodiment, the techniques may be realized as an apparatus providing an additional sanitization fluid dispensing path. The additional sanitization fluid dispensing path may include a sealing housing which may include a sealing ring, the sealing ring having a first opening for holding a first sanitization fluid dispensing path, a perimeter ring wall connected at one end to the sealing ring and arranged substantially perpendicular to the sealing ring, wherein the perimeter ring wall is configured to fasten the sealing ring to a sanitization fluid container, and a sealed cavity configured to accept an adapter to conduct sanitization fluid, wherein acceptance of the adapter opens the sealed cavity to form a second sanitization fluid dispensing path.