摘要:
The present invention relates to a method for determining a present state of wear of a hydrostatic machine during the operation of the hydrostatic machine. The hydrostatic machine comprises a drive with variable rotational speed and a hydrostatic pump, wherein the drive is designed to drive the hydrostatic pump for generating a volume flow of a fluid, and wherein the hydrostatic machine is connected to a fluid transport channel in which the fluid is transported in a manner driven by the hydrostatic machine. The method has a step for determining a first torque of the drive at a specified drive vector. Furthermore, the method has a step for ascertaining a second torque of the drive at the specified drive vector using a first calculation method, and in addition, the method has a step for determining the present state of wear of the hydrostatic machine using a second calculation method, in order to compare the first determined torque and the second ascertained torque to one another.
摘要:
A pump control system includes a pump operable via actuation of an actuator that moves an actuating element to cause the pump to generate an intake stroke and a discharge stroke to pump media along a pipe or conduit. A sensor is disposed at the actuator and is operable to sense the position of the actuating element during operation of the actuator and pump. A controller is operable to control the actuator. The controller, responsive to an output of the sensor, determines the current position of the actuating element and automatically controls the actuator to provide a selected performance of the pump.
摘要:
A method and controller for creating a digital twin of a pump. The method includes receiving, by a controller, a specification curve corresponding to a centrifugal pump. The method includes building and executing, by the controller, a first model of the centrifugal pump, based on the specification curve. The method includes receiving sensor data corresponding to and during the operation of the pump. The method includes updating the first model according to the sensor data to produce an updated model, and storing the updated model as a digital twin of the centrifugal pump.
摘要:
A washing machine and a detergent delivery pump assembly thereof are provided. The detergent delivery pump assembly includes a pump defining a plurality of fixed-volume chambers therein for containing detergents respectively, each fixed-volume chamber being provided with a liquid inlet valve and a liquid outlet valve; a plurality of pistons disposed in the plurality of fixed-volume chambers in one-to-one correspondence relationship and each including a piston head, the piston head being controlled to reciprocate in the fixed-volume chamber to draw or push out a fixed volume of detergent; a motor assembly; and a transmission mechanism to associate the piston heads with the motor assembly, such that the piston heads are controlled to move in the fixed-volume chambers by the motor assembly.
摘要:
A wellbore servicing method comprising transporting a pump unit comprising a unit controller and pumping equipment to a wellsite. Executing a design process on the unit controller to determine a concentration of a wellbore treatment fluid at a wiper plug within an oilfield tubular. The design process utilizes a CFD model to generate a static mesh representative of the geometry of the oilfield tubular, locate the wiper plug within the static mesh, and determine a fluid velocity on each side of the wiper plug with flexible static mesh cells. The CFD model can generate a prediction of the concentration of the wellbore treatment fluids in response to the wiper plug reaching a target location within the oilfield tubular.
摘要:
A method for regulating the flow of a viscosity-dependent liquid in a graphic process, including a pump (5) configured for pumping a viscosity-dependent liquid (3) from a first container (4) and to a graphic printing machine (1), and wherein the viscosity of the liquid (3) affects operation of the pump (5), a sensor (8) connected with the pump (5) and which is configured to measure at least one of the operational parameters of the pump (5), and a controller (9) connected with the sensor (8) and which is configured to analyze the data from the sensor (8). The controller (9) determines the viscosity of the liquid (3) from the measured operational parameters of the pump (5) and generates a control signal (17) from the measured viscosity, based on which the viscosity of the liquid (3) pumped through the pump (5) can be adjusted.
摘要:
A washing machine and a detergent delivery pump assembly thereof are provided. The detergent delivery pump assembly includes a pump defining a plurality of fixed-volume chambers therein for containing detergents respectively, each fixed-volume chamber being provided with a liquid inlet valve and a liquid outlet valve; a plurality of pistons disposed in the plurality of fixed-volume chambers in one-to-one correspondence relationship and each including piston head, the piston head being controlled to reciprocate in the fixed-volume chamber to draw or push out a fixed volume of detergent; a motor assembly; and a transmission mechanism to associate the piston heads with the motor assembly, such that the piston heads are controlled to move in the fixed-volume chambers by the motor assembly.
摘要:
A method for determining a current wear (w) of a hydrostatic pump, particularly of a radial piston pump, with a variable-speed drive, where the pump is connected to a fluid passage, in which a fluid is pumped by the pump to create a current actual volume flow in the fluid passage. A current actual volume flow (Qact) is determined, by measuring the volume flow in the fluid passage at a predetermined drive-vector, a computed volume flow (Qcomp) is determined, by a first computational method, at the predetermined drive-vector, and the current wear (w) of the pump is determined, by a second computational method, which relates the current actual volume flow (Qact) to the computed volume flow (Qcomp).
摘要:
A delivery device for delivering a detergent independently of a change in a viscidity of a detergent and a method of controlling the same are provided. The delivery device includes a detergent storage; a pump configured to inject the detergent into the detergent storage; a motor configured to drive the pump; a delivery container communicated with the detergent storage via a first one-way valve; a dissolving container communicated with the delivery container via a second one-way valve, the first and second one-way valves having opposite liquid conducting directions; a piston disposed in the delivery container; a crank-connecting rod mechanism constituted by the delivery container, the piston, a piston rod and a crankshaft; a contact switch; a cam disposed on a main journal of the crankshaft, a point of an outer contour of the cam triggering the contact switch to turn on and off once when the crankshaft makes one revolution.
摘要:
Embodiments described herein provide systems and methods for high viscosity pumps including a noncompliant filter. One embodiment can include a multi-stage pump comprising an pump inlet flow path, a pump outlet flow path, a feed stage in fluid communication with the pump inlet flow path, a dispense stage in fluid communication with the feed stage and the pump outlet flow path, a noncompliant disposable filter for high viscosity fluid in a flow path between the feed stage and the dispense stage and a set of valves to selectively allow fluid flow through the multi-stage pump.