625results about "Fluid parameter" patented technology

The shutdown of a compressor (10) installed in a refrigerant circuit (2) in air conditioning or refrigeration system is controlled so as to prevent unpowered reverse rotation of the compressor. Prior to terminating electric power to the compressor drive motor (24), the pressure within the system is relieved and substantially equalized across the compressor, thereby eliminating the possibility of unpowered reverse rotation of the compressor at shutdown. Pressure relief and equalization may be achieved by reducing the operating speed of the compressor to a low forward speed for a period of time prior to deenergizing the compressor drive motor. Pressure equalization may also be achieved by driving the compressor in reverse rotation prior to deenergizing the drive motor.

A gas compressor is capable of adjusting a temperature of a heat recovery liquid discharged from a waste-heat-recovery heat exchanger to a desired temperature at a low cost without providing a temperature adjusting valve in a passage of the heat recovery liquid. The gas compressor includes a heat exchange liquid temperature sensor for detecting the temperature Tw2 of a heat exchange liquid discharged from a waste-heat-recovery heat exchanger, and a passage that allows at least part of a high-temperature fluid cooled by an air-cooled cooler to flow therethrough into a compressor. A controller has a heat exchange liquid temperature adjusting function to control the rotational speed of a cooling fan such that the temperature Tw2 detected by the heat exchange liquid temperature sensor gets closer to a predetermined target heat exchange liquid temperature Tw2t.

In a hydraulic drive system used for an electrically driven hydraulic work machine that drives a hydraulic pump by an electric motor and supplies a hydraulic fluid to plural actuators to carry out work, the power consumption of the hydraulic pump is kept from exceeding a value decided in advance. For this purpose, a controller calculates target power to be consumed by the hydraulic pump on the basis of the capacity of the hydraulic pump, the delivery pressure of the hydraulic pump sensed by a pressure sensor, and a target revolution speed of the electric motor, and limits the target revolution speed of the electric motor in such a manner that the target power falls within a range of the maximum allowable power.

A fracturing apparatus includes a motor, a first plunger pump, a power supply platform, a gas turbine engine, a generator, and one or more rectifiers. At least two of the gas turbine engine, the generator, and the one or more rectifiers are arranged on the power supply platform. A first end of the generator is connected to the gas turbine engine. A second end of the generator is connected to the one or more rectifiers. The generator is configured to output a voltage to the one or more rectifiers. The one or more rectifiers are configured to provide power to the motor. The motor is configured to drive the first plunger pump.

Disclosed herein are embodiments of an apparatus for detecting a fault condition of a pump for pumping a fluid, the apparatus comprising: a sensor for measuring a physical property of the fluid, a housing accommodating the sensor and configured for being mounted with said sensor in operational connection with the liquid, a signal processing unit accommodated within the housing and configured to receive a sensor signal from the sensor and to process at least the received sensor signal to detect an occurrence of the fault condition, a communications interface accommodated within the housing and configured to communicate a fault signal indicative of the detected occurrence of the fault condition to a system external to the housing.

A pump having a motor, an inlet port, a discharge port, a fluid sensor, and a controller is provided. The fluid sensor is configured to detect whether a fluid level has risen above a threshold fluid level. The controller is configured to activate the pump in response to the fluid sensor detecting that the fluid level has risen above the threshold fluid level, initiate a shutoff delay timer in response to the fluid sensor detecting that the fluid level has receded below the threshold fluid level, the shutoff delay timer having a shutoff delay time, increase the shutoff delay time if the fluid sensor detects that the fluid level has risen above the threshold fluid level again before the shutoff delay time elapsed, and maintain the shutoff delay time if the fluid sensor detects that the fluid level stayed below the threshold fluid level until the shutoff delay time elapsed.

The invention provides a compressor intelligent control method and system based on dynamic pressure relief and a storage medium, and the method comprises the steps: firstly, capturing the multi-physical field coupling characteristics of a compressor in a shutdown state in real time by deploying a pressure, temperature, vibration and current four-dimensional sensing network; secondly, based on a preset pressure entropy model, fusing the pressure fluctuation intensity, the temperature anomaly index, the high-frequency vibration factor and the current attenuation coefficient to quantitatively evaluate a pressure entropy value, and triggering a three-stage pressure relief mode based on the pressure entropy value; then, based on the deviation between the cavity pressure and the target pressure, pressure relief parameters are dynamically adjusted, and stable pressure transition is achieved; and finally, collecting full-link data of pressure relief operation, and dynamically optimizing pressure entropy model parameters based on reinforcement learning, so that the system continuously adapts to equipment aging and working condition changes. Through dynamic closed-loop adjustment, pressure relief energy consumption waste and equipment loss are reduced, and the stability of the pressure relief process is improved.

A pump performance data logging system is provided. The pump performance data logging system comprises a pump and a plurality of sensors configured to measure at least two different parameters regarding the operation or condition of the pump. The pump performance data logging system also comprises a data logging apparatus having processing circuitry, memory, a case, and a plurality of sensors ports that are configured to receive the plurality of sensors. The case is configured to encase the plurality of sensor ports, the memory, and the processing circuitry, and the data logging apparatus weighs 50 pounds or less.

A method for controlling one or more frac pumps of a fracturing spread. The method comprises adjusting a total pump rate of one or more target pumps of the frac pumps to achieve a total rate setpoint for the frac pumps. The method comprises activating one or more trim pumps for an additional pump rate to compensate for a total rate dip occurring when the total pump rate of the one or more target pumps is adjusted.

A system for monitoring a piece of hydraulic fracturing equipment such as a positive displacement pump. The system includes a plurality of sensors configured to detect conditions of the hydraulic fracturing pump and a processor that is communicatively coupled to the plurality of sensors and configured to analyze data received from the plurality of sensors. The processor is also configured to predict faults in the hydraulic fracturing pump based on the data analysis. The system also includes a communication interface that is configured for transmitting predicted fault data to one or more devices.

A hydraulic-pump flow-rate calibration system includes: a variable capacitance type hydraulic pump that supplies an operating fluid to a hydraulic actuator; a regulator that changes the dispense flow rate of the hydraulic pump according to a flow rate command signal; a flow rate detection device that detects the flow rate of the operating fluid; a control device that outputs the flow rate command signal to the regulator to control the regulator; and a calibration device that calculates an actual measurement characteristic of the dispense flow rate for the flow rate command signal, and performs, on a preset reference characteristic, calibration based on the actual measurement characteristic. The actual measurement characteristic is calculated as a result of the flow rate of the operating fluid being detected by the flow rate detection device during output of a predetermined flow rate command signal from the control device to the regulator.

The present application describes a positive displacement pump for delivering a material to be delivered, comprising a measurement assembly having at least one measurement channel through which at least a portion of the material to be delivered delivered by the pump can flow, the at least one measurement channel having a non-circular cross-section, and the measurement assembly having a pressure sensor assembly, and a pressure sensor for detecting pressure acting at positions spaced apart in the flow direction of the at least one measurement channel when at least a portion of the material to be conveyed conveyed by the pump flows through the at least one measurement channel. A system having a positive displacement pump and a control unit is also described.

An apparatus, system and method for regulating fluid flow are disclosed. An apparatus for infusing fluid into a patient includes a housing, a tube-contact member, a rotating arm, and a tube-retention cover. The housing has an opening on a front side of the housing. The opening is sized to receive a drip chamber having an inlet tube and an outlet tube. The tube-contact member contacts one of the inlet tube and the output tube of the drip chamber when inserted into the opening. The rotating arm is coupled to the tube-contact member and is configured to rotate along an axis. The tube-retention cover is configured to close when the drip chamber is initially loaded into the opening.

An electric pump system and method of operating the same involves pumping a fluid through a fluid passageway defined in a mechanical pump from a pump inlet to a hollow shaft of a motor, through the hollow shaft to an internal motor cavity defined by a housing of the motor, and through another fluid passageway defined in the motor housing and mechanical pump that leads to a pump outlet. The system and method further involve pumping the fluid through another fluid passageway defined in the mechanical pump from yet another pump inlet to the pump outlet. The temperature of fluid exiting the hollow shaft can be assessed and used by an electronic control unit (ECU) of the electric pump system to control the same. The electric pump system can be part of a cooling and lubrication system for an electric vehicle transmission, gearbox, differential or transfer case, for example.

A pump may generally include a frame including a reservoir. The reservoir stores a hydraulic fluid. The pump may also include a motor assembly supported by the frame and a pump assembly operably driven by the motor assembly. The pump assembly is in fluid communication with the reservoir and configured to dispense the hydraulic fluid out of the frame. The pump assembly includes a first piston and a second piston, wherein the first piston dispenses hydraulic fluid out of the frame between a first pressure and a second pressure greater than the first pressure, and the second piston dispenses hydraulic fluid out of the frame between the first pressure and a third pressure, the third pressure being greater than the second pressure.

A fluid compressor system having an electro-magnetic throttle valve (EMTV) that utilizes magnetic forces supplied by an electromagnet to actuate the opening and closing of the valve. The fluid compressor system may include a control system that controls the position of a valve plate of the EMTV, allowing the EMTV to fully or partially actuate to a plurality of intermediate positions depending on a current supplied to the electromagnet by the control system. The control system may control a location of the valve plate with reference to the electromagnet by balancing the forces acting on the valve plate, such as electromagnetic forces supplied by the electromagnet, biasing forces supplied by biasing components, and gravitational forces acting on the valve plate. The EMTV may include a blowdown system configured to release a pressure within the fluid compressor system when the inlet on the EMTV is closed.

A method for controlling a first reference temperature in a device (1) for compressing gas, the device (1) including an oil-injected element (2) for compressing the gas; an oil injection pipe network (6) for injecting oil into the oil-injected element (2), including: an apportioning means (8) for apportioning the oil into a first part and into a second part; an oil cooler (10) cooled by a fan (9), for cooling the first part; and a bypass (11) for diverting the second part past the oil cooler (10). An apportioning proportion of the first part is controlled to a required apportioning proportion, and subsequently a speed of the fan (9) is controlled to a required speed optionally on the basis of the apportioning proportion, wherein the apportioning proportion is controlled by a control unit (15) on the basis of a non-fuzzy logic algorithm.

A pump includes a power end and a fluid end coupled to the power end. The power end includes a plunger, and the fluid end includes a crossbore in selective fluid communication with inlet and outlet bores. A suction valve controls fluid communication between the inlet bore and the crossbore, and a discharge valve controls fluid communication between the outlet bore and the crossbore. An actuation device is used to move the discharge valve between an open position and a closed position. A position sensor measures a position of the plunger. A pressure sensor measures a pressure of the crossbore, the inlet bore, or the outlet bore. A controller operates the discharge valve based on data from at least one of the position sensor or the pressure sensor.

The present disclosure relates to a mobile testing and / or calibration device and a method for testing and / or calibrating a hydraulic and / or electrical component at a location where the hydraulic and / or electrical component is used and / or under operating conditions of the hydraulic and / or electrical component. The mobile testing and / or calibration device comprises at least one first sensor unit for acquiring performance data of a hydraulic and / or electrical component to be tested and / or calibrated. Furthermore, at least one second sensor unit is provided for acquiring at least one testing and / or calibration parameter, wherein the testing and / or calibration parameter includes current parameters of the location and / or the operating conditions.In addition, at least one supply and / or control unit is provided for providing drive means and / or control parameters for the operation of the hydraulic and / or electrical component, and a computing unit for the automated testing and / or calibration of the hydraulic component during the operation of the hydraulic and / or electrical component based on the recorded performance data and the recorded test and / or calibration parameters.

A system includes a variable displacement pump (VDP) in fluid communication with an inlet line and with an outlet line. The VDP includes a variable displacement mechanism configured to vary pressure to the outlet line. A bypass valve (BPV) includes a BPV inlet in fluid communication with the outlet line, and a BPV outlet in fluid communication with a bypass line that feeds into the inlet line upstream of the VDP. A minimum pressure shutoff valve (MPSOV) is connected in fluid communication with the outlet line, configured to block flow through the outlet line for shutoff. The MPSOV is connected in fluid communication with the BPV for triggering recirculation through the BPV.

Systems and methods provided herein relate to optimization of the motor of a pump system. Voltage-frequency ratios are adjusted while maintaining pumps speed in a systematic manner to lower power usage. Oscillations of the motor speed are detected, and voltage-frequency ratios adjusted to maintain low levels of oscillations while lowering power usage. Savings resulting in the optimization of the pump system are estimated.

A pressurized gas delivery system includes at least a first gas supply source and a second gas supply source. The first gas supply source is configured to supply a first pressurized gas output, and the second gas supply source is configured to supply a second pressurized gas output. A valve including at least a first position and a second position fluidly connects an outlet of the first gas supply source to a system outlet in the first position and to an inlet of the second gas supply source in the second position.

Devices and methods for operating a diaphragm compressor. Embodiments of the present disclosure comprise an oil piston being driven to pressurize work oil against the diaphragm of the compressor. In embodiments, an injection pump provides a supplemental flow of work oil in the region of pressurized fluid, and such pump may be part of an actively controlled system. In embodiments, a pressure relief valve vents an overpump flow of work oil, and such valve may be variable. Embodiments provide feedback and control mechanisms, including control of the injection pump and the relief valve.

A pump includes a power end and a fluid end coupled to the power end. The power end includes a plunger, and the fluid end includes a crossbore in selective fluid communication with inlet and outlet bores. A suction valve controls fluid communication between the inlet bore and the crossbore, and a discharge valve controls fluid communication between the outlet bore and the crossbore. An actuation device is used to move the discharge valve between an open position and a closed position. A position sensor measures a position of the plunger. A pressure sensor measures a pressure of the crossbore, the inlet bore, or the outlet bore. A controller operates the discharge valve based on data from at least one of the position sensor or the pressure sensor.

A compressor unit includes a first spillback valve, an adjusting means that adjusts a processing amount of hydrogen gas by a succeeding compression stage, an upstream side temperature sensor, and a controller. The controller refers to suction temperature acquired by the upstream side temperature sensor, and can execute a first control and a second control, the first control being of controlling the first spillback valve so that suction temperature falls within a predetermined temperature range, and the second control being of controlling the adjusting means so that a processing amount of the succeeding compression stage is adjusted according to a change amount in pressure in an intermediate flow path caused by the first control. The predetermined temperature range is set to a range higher than reference temperature based on liquefaction temperature of air and less than 0°C.

A pump includes a power end (106a) and a fluid end (104a) coupled to the power end. The power end includes a plunger (208), and the fluid end includes a crossbore (244) in selective fluid communication with inlet and outlet bores (242, 243). A suction valve (290) controls fluid communication between the inlet bore and the crossbore, and a discharge valve (292) controls fluid communication between the outlet bore and the crossbore. An actuation device is used to move the discharge valve between an open position and a closed position. A position sensor measures a position of the plunger. A pressure sensor (441-443) measures a pressure of the crossbore, the inlet bore, or the outlet bore. A controller (420) operates the discharge valve based on data from at least one of the position sensor or the pressure sensor.

Apparatus and associated methods relate to using an electro-hydraulic solenoid valve to provide regulation of fluid displacement of a variable-displacement hydraulic pump. A mechanical control mechanism is configured to control displacement of hydraulic fluid pumped from a hydraulic input port to a hydraulic output port. The electro-hydraulic solenoid valve regulates fluid conductivity between a hydraulic output port of the variable-displacement hydraulic pump and a hydraulic control cylinder, which operates a hydraulic control piston coupled to the mechanical control mechanism controlling fluid displacement. An electronic control unit is configured to generate and transmit an electrical control signal to the electro-hydraulic solenoid valve in response to a metric of the variable-displacement hydraulic pump as measured by a transducer. The electronic control unit generates the electrical control signal so as to control the metric measured to within a predetermined control band about a target value.

Method for controlling a compressor (10) which drives a pneumatic tool, with a maximum allowed pressure (p_max) and an associated compressed air consumption (q_max), the method comprising the step of regulating the operating pressure (p_compr) of the compressor (10), said method comprising: - if the operating pressure (p_compr) is lower than p_max minus a value (Z): controlling the compressor (10) such that the flow rate supplied by the compressor (10) is not limited; - if the operating pressure (p_compr) is higher than or equal to p_max: controlling the compressor (10) such that the flow rate supplied by the compressor (10) does not exceed the compressed air consumption (q_max) at p_max; - if the operating pressure (p_compr) is higher than p_max minus the value (Z) and is lower p_max: controlling the compressor (10) such that the operating pressure (p_compr) remains lower than p_max.