106results about "Pulse equalisation" patented technology

An assembly and method are disclosed for generating and detecting a modulated pressure signature in a fluid transported to a subsurface injection zone. The assembly includes a pump, a pulsation dampener, and a pressure modulation device that oscillates pressure to produce a frequency-modulated signature in the fluid, resulting in an alternating current streaming potential (AC-SP) at the injection zone. The method includes recording modulated electromagnetic signals at an array of electromagnetic field receivers on a surface above the subsurface injection zone, processing the data to identify source frequency signals, and correlating these signals to image subsurface fluid or pressure distribution, enabling three-dimensional mapping of subsurface structures.

A pulsation dampener includes: a centerbody assembly having: a chamber including a first opening bounded by a wall defining a first surface; an outlet port communicating with the chamber; an inlet port communicating with the chamber; a flexible first diaphragm, wherein a perimeter of the first diaphragm is bonded to the first surface forming a seal that blocks the passage of fluid; a first cap disposed adjacent the first diaphragm, defining a first cavity between the first cap and the first diaphragm; an inlet orifice formed in the first cap communicating with the first cavity; an exhaust orifice formed in the first cap communicating with the first cavity; and a valve seat disposed in the first cavity in fluid communication with the exhaust orifice. The first diaphragm is moveable between an open position spaced away from the valve seat, and a closed position sealed against the valve seat.

The invention provides a fault identification and processing method and control system for a high-pressure pump, and the method comprises the steps: a sensor assembly obtains the operation information of the high-pressure pump, and transmits the operation information to an MCU; the MCU determines the operation state of the high-pressure pump according to the operation information; wherein the operation state comprises a normal state, a no-load state, a bubble state and a blocking state; the MCU sends a normal instruction or a control instruction to the ECU according to the running state; and the ECU limits the operation of the high-pressure pump or controls the high-pressure pump to stop according to the control instruction. Dry grinding and high heat of the motor in a liquid-free cooling state are avoided, the temperature rise of the motor is effectively controlled, insulation aging or coil burning is avoided, and the service life of the motor is remarkably prolonged.

The invention provides a pressurizing assembly for a radial plunger pump and the radial plunger pump, and belongs to the field of plunger pumps. The pressurization assembly for the radial plunger pump comprises a pressurization shell and an impeller, the pressurization shell is provided with an inner cavity, the inner cavity comprises a pressurization area used for containing the impeller and a conveying area communicating with the periphery of the pressurization area, and a suction inlet used for sucking a working medium is formed in the shell wall, corresponding to the pressurization area, of the pressurization shell. The shell wall, corresponding to the conveying area, of the pressurizing shell is provided with a discharging opening used for discharging the working medium. During use, the impeller can rotate along with the rotating shaft in the pressurizing area so that the working medium can be discharged after being pressurized in the pressurizing shell. The radial plunger pump comprises the pressurizing assembly. According to the radial plunger pump, the working medium is pressurized in advance, so that the working medium can enter the plunger assembly more easily, the phenomena of cavitation, air suction and the like are reduced, and the radial plunger pump has better working capacity and longer service life.

The invention provides a refrigerant pump, a refrigerating system and a control method of the refrigerant pump. The refrigerating system comprises a refrigerant liquid storage tank, an evaporator, a condenser and the refrigerant pump. The refrigerant pump comprises a pump main body, an anti-cavitation liquid storage tank and a first bypass pipeline, an inlet of the pump main body communicates with an outlet of the anti-cavitation liquid storage tank, and the anti-cavitation liquid storage tank is provided with a first inlet; one end of the first bypass pipeline is located on the liquid inlet pipeline, and the other end of the first bypass pipeline is located on the liquid outlet pipeline. A bypass valve is arranged on the first bypass pipeline and used for being opened when the refrigerant pump is started for the first time and the pump body is started abnormally or operates abnormally, and the bypass valve is further used for being closed when the pump body operates normally. The refrigerant pump can conduct self-adaptive adjustment when the refrigerant flow is too large or too small, it is guaranteed that a refrigerating system can operate normally all the time, and the operation reliability of the refrigerant pump is improved.

A novel passive surge water hammer protection system, which is useful for Automated Surge Water-Hammer Transients control, protection and for preventing water hammer transients from occurring in a water pipeline & pumping plant. The present SCT invention creates two differential HGLs at same junction / node, Upstream level at (16) and Downstream level at (10) inside the circular vertical loop (4)=(1,16,9,10,11,2) an unequal column separation, vertical differential (16,10) is developed, this simple passive method to force the minimum negative pressure from below the pipe invert level to minimum positive pressure (16,10) which is well above the pipe invert level (HGL-3).

The utility model discloses a peristaltic pump, which belongs to the technical field of microfluid accurate transportation, aims to solve the problems of low precision and flow pulse of the existing mechanical peristaltic micropump, and comprises a micro-fluidic chip, a clamp component and a driving mechanism, wherein the clamp assembly and the driving mechanism are both connected with the shell, and the micro-fluidic chip is fixed on the outer side of the driving mechanism through the clamp assembly; a flow channel is arranged on one side, wound on the driving mechanism, of the micro-fluidic chip, and the driving mechanism is in fluctuating contact with the flow channel during pumping and is used for extruding fluid in the flow channel in a fluctuating manner; an air cavity is formed in the tail end of the flow channel, microfluid can be stored and released in real time, and pulse fluctuation of the fluid is compensated. According to the utility model, flow fluctuation real-time compensation can be carried out on fluid in the flow channel, the flow pulse error of peristaltic fluid is effectively reduced, the device has the advantages of no pulse, high precision, continuous pumping of microfluid and the like, and stable driving and control of the microfluid are met.

Disclosed is a constant flow pump, including a constant flow pump case. A motor support base is fixedly mounted at a top of the constant flow pump case, A drive motor is fixedly mounted at a top of the motor support base. An output end of the drive motor penetrates through the motor support base. A coupling is arranged in the motor support base. A linkage rod is driven by an adjusting hand wheel to enable a connecting plate to move internally. A limiting bump is separated from a slot. A butting seat can be extracted. A rotating shaft and an eccentric cam are detached rapidly. During mounting, the butting seat with a new component is inserted, the limiting bump is in contact with the slot, the adjusting hand wheel is loosened, and a limiting spring enables the bump to be clamped into the slot to accomplish clamping.

The application discloses a horizontal hydraulic diaphragm pump and belongs to the technical field of diaphragm pumps. The horizontal hydraulic diaphragm pump comprises a power end, a hydraulic end, an auxiliary system and a control system. The hydraulic end comprises a hydraulic chamber adopting an asymmetric gradually changing cross section design, a gravity compensation type gradient rigidity composite diaphragm, a diaphragm chamber and an integrated intelligent exhaust device, the top of the hydraulic chamber is provided with a spherical crown gas collection concave cavity; the diaphragm is divided into a central flexible area, a transition buffer area and an edge rigid area along the radial direction, and a reinforcing framework is embedded in the lower semicircular area; the intelligent exhaust device comprises a bubble aggregation cavity, a gas-liquid separation microchannel group, a liquid level sensor and an exhaust electromagnetic valve. The auxiliary system comprises a double-cavity pre-pressing pulsation buffer, an air bag is arranged in a main buffer cavity, and a spring piston is arranged in an auxiliary buffer cavity. The control system adopts a pressure gradient self-adaptive reversing control and an iterative learning control algorithm to inhibit pressure pulsation, and solves the problems of asymmetric force bearing of the diaphragm, gas accumulation in the hydraulic chamber, large flow pulsation and reversing impact and the like under the horizontal arrangement.

The application relates to the technical field of volume pumps, in particular to an improved reciprocating pump which comprises a power unit and a hydraulic unit; the improved reciprocating pump further comprises a compensation unit which is arranged on the hydraulic unit and is used for compensating the liquid suction effect of a far-end cylinder, the compensation unit comprises a compensation frame arranged below the hydraulic unit, a plurality of compensation cylinders are mounted on the upper end of the compensation frame and are in communication, a pushing part is arranged in the compensation cylinder, and a feeding head is mounted on the end of the compensation frame. The compensation unit adopted by the application cooperates with the driving unit, can effectively fill the viscous medium into the plurality of cylinders of the hydraulic unit, avoids the phenomena of multiple-cylinder liquid stealing, suction flow deviation and far-end cylinder cavitation during the use of the reciprocating pump, avoids the damage of core components such as pump cylinders and piston rods, ensures the uniformity of the liquid suction of the reciprocating pump, and greatly prolongs the service life of the core vulnerable components.

The invention relates to the technical field of displacement pumps, in particular to an improved reciprocating pump which comprises a power unit and a hydraulic unit. The improved reciprocating pump further comprises a compensation unit, the compensation unit is arranged on the hydraulic unit and used for compensating the liquid suction effect of the far-end cylinder, the compensation unit comprises a compensation frame arranged below the hydraulic unit, the upper end of the compensation frame is provided with and communicates with a plurality of compensation cylinders, and pushing parts are arranged in the compensation cylinders. And a feeding head is mounted and communicated with the end part of the compensation frame. According to the reciprocating pump, the adopted compensation unit is matched with the driving unit, the multiple cylinders of the hydraulic unit can be effectively and actively filled with viscous media, the phenomena of multi-cylinder liquid grabbing, suction bias flow and far-end cylinder cavitation during use of the reciprocating pump are avoided, damage to core components such as the pump cylinder and a piston rod is avoided, the liquid suction uniformity of the reciprocating pump is guaranteed, and the service life of the reciprocating pump is prolonged. And the service life of a core damageable part is greatly prolonged.

A dampening device includes a housing including an inlet and an outlet, and a section of compliant tubing extending through the housing between the inlet and the outlet. A first portion of the housing is movable relative to a second portion of the housing to vary fluid flow characteristics within the section of compliant tubing. A dampening device includes a housing defining an interior volume, wherein the housing includes an inlet and an outlet, and an actuation mechanism configured to change the interior volume thereby changing fluid flow characteristics through the housing. A method of smoothing a pulsatile fluid flow includes coupling the dampening device to an inflow line, activating the fluid pump, wherein the section of compliant tubing expands within the housing to smooth out the pulsatile fluid flow, and selectively moving a first portion of the housing relative to a second portion to vary fluid flow characteristics.

By arranging at least one air-tight diaphragm (110) mounted by means of an elastic support, an effective sound damping device (100) is created for damping sound waves occurring in an air-tight closed system. The support has an elasticity which is determined to effectively convert sound energy into kinetic energy and thereby reduce the sound energy.

High-pressure fuel supply pump a pump body (1a) in which a pressurization chamber (11) is formed, and a cylinder (6) which is inserted into a cylinder fitting hole (6f) which is formed in the pump body (1a) and has a cylindrical shape, comprising the high-pressure fuel supply pump: a projection (1f) which is arranged on an end section (1k) of the pump body (1a) which is opposite the pressurization chamber (11), wherein this projection is formed from an outer circumferential side to an inner circumferential side with respect to an inner circumferential surface opposite to an outer circumferential surface of the cylinder (6) and projects in the axial direction of the cylinder (6), wherein the projection (1f) is designed such that it protrudes in the direction of the side opposite the pressurization chamber (11) with respect to a flat section of the end section (1k) of the pump body (1a), and the projection (1f) is designed in such a way that it supports the cylinder (6) from one side opposite the pressurization chamber (11).

Provided herein are methods and systems for use with peristaltic pumps. More specifically, provided herein are peristaltic pump systems that include a damping device for reducing pulsations in flow rate from the peristaltic pump system for producing, mixing, transporting, and / or manufacturing pharmaceutical compositions and formulations, including pharmaceutical compositions and formulations that include lipids and RNA.

The invention relates to a method for operating an electric machine 3 which drives a displacement pump stage 2 in order to deliver a liquid through a hydraulic system and to supply at least one consumer 10 with liquid. By manipulating the rotational speed of the electric machine 3 in correspondence with periodically recurring pressure fluctuations, periodically recurring liquid pressure fluctuations occurring during the delivery are at least partially compensated. The invention also relates to a delivery pump 4, to a motor vehicle 1 having such a delivery pump, to a computer program and to a computer-readable medium.

The present application discloses a diaphragm pump overload protection device, comprising a housing, an overload protection mechanism, and a cushioning mechanism, wherein a sealed accommodating cavity is formed in the housing, and the housing is provided with a hydraulic inlet, hydraulic outlets, and a pressure relief port; the overload protection mechanism comprises a safety valve, a back pressure pipe, and back pressure valves; and the cushioning mechanism comprises an energy storage tank and a diaphragm. The diaphragm pump overload protection device provided by the present application has the following beneficial effects: the hydraulic inlet is communicated with a liquid discharge port of a power end, and the hydraulic outlets are communicated with a liquid inlet of a diaphragm chamber of a diaphragm pump; when the pressure of liquid discharged from the power end exceeds the safety pressure of the safety valve, the liquid enters the back pressure pipe through the safety valve and then enters an energy storage cavity of the energy storage tank, so as to push the diaphragm to press a cushioning cavity, thereby performing energy storage and cushioning, which can reduce the amplitude of pressure change of the liquid entering the diaphragm chamber, thereby reducing the impact force on a normal temperature area of a hydraulic end of the diaphragm pump, reducing the vibration intensity, and prolonging the service life of components.

Systems and methods for reducing pulsation in peristaltic pumps are disclosed. In some examples, the cartridge includes a housing and a flexible sheet coupled to the housing, wherein a transition region of the flexible sheet includes at least one ridge having a maximum height at a location offset from the centerline of the housing transition channel. In some examples, the housing transition channel includes sidewalls that taper toward the active area of ​​the fluid path and / or toward the bottom of the transition channel. An example method of operating a peristaltic pump includes operating a roller at a higher speed during a rotating portion that would otherwise result in a below-average flow rate, and operating the roller at a lower speed during a rotating portion that would otherwise result in an above-average flow rate.

A disposable single-piston dual-action reciprocating pump part includes a single piston, an output port, and a balloon damper. The output port is configured for outputting fluid pumped by the single piston. The balloon damper is fitted in the output port, and the balloon damper is configured to suppress a pulsation in a flow rate of the outputted fluid.

The invention provides an in-pump pressure pulsation eliminating structure which comprises a pump cover assembly, the pump cover assembly is provided with a water inlet area, a water outlet area, a water inlet and a water outlet, and an energy absorption cavity is formed between the water inlet and the water inlet area and / or between the water outlet area and the water outlet; the damping diaphragm is arranged in the energy absorption cavity and divides the energy absorption cavity into a first cavity and a second cavity, a water inlet hole and a water outlet hole are formed in the first cavity, and the second cavity is a sealed cavity; the damping body is made of an elastic material and has elasticity, the damping body is arranged in the second cavity, one end of the damping body can make contact with the damping diaphragm, the other end of the damping body makes contact with the end of the second cavity to provide elastic supporting force for the damping diaphragm, and the contact area between the damping body and the damping diaphragm changes along with deformation of the damping diaphragm. The in-pump pressure pulsation eliminating structure is compact in structure, small in size, capable of achieving efficient, stable and long-acting restraining on pressure pulsation and suitable for high-precision fluid conveying scenes.

The invention relates to a method for operating a construction-material and / or thick-matter pump device (1) which has two variable-volume delivery chambers (F1, F2) which are each delimited by means of a delivery cylinder (Z1, Z2) and by means of a delivery piston (K1, K2), and a drive hydraulic system (2) for driving the delivery pistons (K1, K2) in an adjusting manner, wherein the drive hydraulic system (2) has a valve device (4) for adapting a swing volume (3) of hydraulic fluid (H) which hydraulically couples the delivery pistons (K1, K2) in terms of movement; the method comprising the steps of: a) executing opposite stroke movements (M1, M2), b) monitoring current piston positions (P1, P2) in order to determine a starting value (W) of a stroke asynchrony (A) of the opposite stroke movements (M1, M2) on the basis of the piston positions (P1, P2), c) discharging hydraulic fluid (H) by means of the valve device (4) such that the swing volume (3) is reduced and the stroke asynchrony (A) relative to the starting value (W) is changed, and d) feeding in hydraulic fluid (H) by means of the valve device (4) such that the swing volume (3) is increased again and the stroke asynchrony (A) is set to the starting value (W) again.

The utility model belongs to the technical field of variable-frequency pumps, in particular to a constant-pressure non-return device of a variable-frequency pump, which comprises a constant-pressure non-return pipeline, the inner end of the constant-pressure non-return pipeline is communicated with the water outlet end of the variable-frequency pump, a pressure tank is fixed on the outer wall of the constant-pressure non-return pipeline, and an inner cavity of the pressure tank is internally and externally divided into an air pressure cavity and a hydraulic cavity through a diaphragm. The hydraulic cavity is communicated with the constant-pressure non-return pipeline through the pressure through hole, a non-return valve assembly is arranged in the constant-pressure non-return pipeline located on the inner side of the pressure through hole, and the non-return valve assembly can prevent liquid from flowing towards the variable frequency pump. The pressure tank is assembled at the water outlet end of the variable frequency pump, and when a gun is shut down, even if water drops outwards from a gun nozzle, the pressure tank can stabilize water pressure in a pipeline, so that the self-starting time interval of the variable frequency pump is effectively prolonged; and the check valve assembly is designed at the inner side pipeline of the pressure tank body, so that the variable frequency pump can be effectively protected, and meanwhile, the pressure tank body can eliminate impact generated by backflow due to rapid change of water flow and water pressure.

The present invention relates to an apparatus (2) for controlling pressure or flow in a fluidic system (3), the apparatus (2) comprising: a first connection device (301) comprising a pumping device (304) and a main outlet (310); a second connection device (302) comprising a flow restriction (305); a third connection device (303) comprising a valve with a modifiable aperture (306); wherein the second connection device (302) and the third connection device (303) are connected to the first connection device (301) at a position between the pumping device (304) and the main outlet (310).

The invention provides a diaphragm pump and a water inlet pressure stabilizing structure thereof. The pressure stabilizing device comprises a water inlet pressure stabilizing seat and a water inlet pressure stabilizing diaphragm, the water inlet pressure stabilizing seat is provided with a water flow inlet, a water flow outlet and a water flow pressure stabilizing port, the water flow inlet, the water flow outlet and the water flow pressure stabilizing port are communicated with one another, the water flow outlet is used for being connected with a water inlet of a pump head, and the water inlet pressure stabilizing diaphragm is made of elastic materials and installed on the water flow pressure stabilizing port in a sealed mode to form a closed pressure stabilizing cavity. The water inlet pressure stabilizing diaphragm can deform along with the change of the water inlet pressure, the water inlet pressure fluctuation is balanced by adjusting the volume of the closed pressure stabilizing cavity, and the water inlet pressure is stabilized. By means of the structure, the connection stability of the water inlet pipeline is greatly improved, pipeline shaking is effectively restrained, the risks of looseness and leakage of the connecting position are reduced, and the reliability and stability of overall operation of the water pump are remarkably improved.