199results 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 relates to a two-cylinder thick matter pump (111), in particular for a truck-mounted concrete pump (100), comprising: at least one first hydraulic pump (115); two hydraulic drive cylinders (147) which are driven in push-pull mode by the at least one first hydraulic pump (115) in order to drive two delivery pistons and each of which runs in one of two delivery cylinders (148) of the two-cylinder thick matter pump (111), wherein the thick matter delivery rate can be set by adjusting the delivery rate of the at least one first hydraulic pump (115); a second hydraulic pump (117) which charges a switch-over hydraulic accumulator (146); at least one switch-over hydraulic cylinder (145) powered by the switch-over hydraulic accumulator (146); and a thick matter switch-over valve (112) driven by the at least one switch-over hydraulic cylinder (145) for alternately connecting the two delivery cylinders (148) to a thick matter delivery line (164). The delivery rate of the second hydraulic pump (117) can be adjusted depending on the set thick matter delivery rate.

Systems and methods to enhance the flow of fracturing fluid into a wellhead during a high and the second plungers may pump a second fracturing fluid different from the first fracturing fluid.

The invention relates to a two-cylinder high-viscosity slurry pump, particularly for a truck-mounted concrete pump, comprising at least one first hydraulic pump, two hydraulic drive cylinders driven in opposite directions by the at least one first hydraulic pump for driving two delivery pistons, each of which runs in one of two delivery cylinders of the two-cylinder high-viscosity slurry pump, wherein the high-viscosity slurry delivery rate is adjustable by adjusting the delivery rate of the at least one first hydraulic pump, a second hydraulic pump which charges a switching hydraulic accumulator, at least one switching hydraulic cylinder supplied from the switching hydraulic accumulator, and a high-viscosity slurry switching valve driven by the at least one switching hydraulic cylinder for alternately connecting the two delivery cylinders to a high-viscosity slurry delivery line. According to the invention, the delivery rate of the second hydraulic pump is adjustable depending on the set high-viscosity slurry delivery rate.

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 application discloses a low-pulsation and low-impact modular hydraulic plunger pump / motor cylinder, which comprises a plunger cylinder and a modular flow distribution plane structure; an annular groove is formed on the flow distribution end face of the plunger cylinder, and the annular groove is uniformly distributed with plunger holes, inner radial grooves and outer radial grooves in the circumferential direction; the modular flow distribution plane structure comprises a circular flow distribution plate and an inner end face boss and an outer end face boss which extend inward and outward along the radial direction of the flow distribution plate; the inner end face boss is matched with the inner radial groove, and the outer end face boss is matched with the outer radial groove, so that the modular flow distribution plane structure is nested in the annular groove of the plunger cylinder, and a flow distribution plane of the cylinder structure is formed; a plurality of flow distribution windows are formed on the flow distribution plate and are uniformly distributed in the circumferential direction, and the flow distribution windows are one-to-one corresponding to the plunger holes; and a damping structure is formed on the end position of the flow distribution window. The application can realize modularization, and can realize the seamless switching of the open and closed pumps and between the pump and the motor.

Example hydraulic systems, control systems, and methods for reducing pump flow ripple are described. Variation in pump displacement, from a nominal pump displacement, based on an angle of a rotating member of a pump is determined. A controller then controls speed and torque of an electric motor driving the pump to compensate for or counter the variation in the pump displacement and reduce flow ripple.

The invention relates to the technical field of low-temperature high-pressure pumps, in particular to a low-temperature high-pressure pump liquid outlet buffer device which comprises a base and further comprises a liquid inlet assembly, a buffer assembly and a liquid outlet assembly which are arranged on the base and sequentially connected through pipelines. The buffer assembly comprises a first support, a fixing part for fixing a plurality of coil pipe dampers to the first support, high-pressure elbows arranged at the ends of the coil pipe dampers and connecting pipes for connecting the high-pressure elbows which are adjacent up and down, and the fixing part is used for fixing the coil pipe dampers to the first support, the high-pressure elbows are arranged at the ends of the coil pipe dampers, and the connecting pipes are used for connecting the high-pressure elbows which are adjacent up and down. By arranging the buffering assembly, the stabilizing problem of liquid outlet pressure pulses of the low-temperature high-pressure pump is solved, the coil pipe damper is adopted, the heat absorption area is increased, the internal gas phase space is increased, the pulse stabilizing capacity is improved, and the liquid outlet pressure pulses are reduced to a reasonable value.

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.

The present invention provides a liquid delivery assistance device, a cell processing device, and a liquid delivery assistance method capable of suppressing pulsation of a liquid flowing through a flow path. The liquid delivery assist device includes: a hose capable of expanding and contracting according to a flow rate of a liquid flowing through the hose; and a gripping member that grips the hose such that the orthogonal cross-sectional area, which is the area of a cross-section orthogonal to the direction of flow of the liquid, of the flow path formed by the hose becomes smaller than the orthogonal cross-sectional area in a natural state. And the hose is used once.

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.

Pulsation dampener (50), comprising: a housing (51) in which a fuel chamber (51a) is defined; and a damper unit (60, 600, 601, 602, 603, 604) arranged in the fuel chamber (51a) to dampen pressure pulsation of fuel, the damper unit (60, 600, 601, 602, 603, 604) comprises: a membrane (61) which is elastically deformed by absorbing fuel pressure, and a plate (62, 620, 621, 622) with a higher stiffness than that of the membrane (61), wherein a gas chamber (61a) is defined between the membrane (61) and the plate (62, 620, 621, 622), which are connected to each other, wherein the plate (62, 620, 621, 622) has a projecting portion (620a, 622a, 621a) that protrudes to enlarge or reduce the gas chamber (61a); and wherein the damper unit (60, 600, 601, 602, 603, 604) corresponds to one of a plurality of damper units arranged in a predetermined direction in the fuel chamber (51a), and wherein the pulsation damper (50) further comprises: a spacer (63, 630, 631) which defines a length of space between adjacent membranes (61) in the predetermined direction, characterized by the fact that the spacer (63, 630, 631) has a regulating part (630e, 631e) in contact with the projection part (620a, 622a, 621a) to restrict the damping unit (60, 600, 601, 602, 603, 604) from moving in a direction perpendicular to the predetermined direction.

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.

Systems and methods to enhance the flow of fracturing fluid into a wellhead during a high and the second plungers may pump a second fracturing fluid different from the first fracturing fluid.

The present application provides a kind of double motion degree of freedom piston pump to solve the technical problems existing in existing piston pump.The piston pump includes: transmission shaft assembly;Pump core is arranged in pump shell structure and is rotatably arranged on transmission shaft assembly, and pump core adopts the integrated series connection structure of upper and lower two groups of pump core, and the series connection structure includes first and second piston structures, which are rotatably arranged on transmission shaft assembly along the axial direction of transmission shaft assembly, and the first and second piston structures both adopt the integrated structure of piston and cam guide rail, and the cam guide rail is located in the middle of piston, and two sleeve structures are symmetrically protruded on both sides of cam guide rail, and any sleeve structure includes outer and inner side cylinder, a plurality of oil suction ports are circumferentially formed on outer side cylinder, a plurality of oil discharge ports are circumferentially formed on inner side cylinder, and any oil suction port and any oil discharge port are staggered;Annular cavity is formed between outer side cylinder and inner side cylinder, the annular cavities of two sleeve structures are not communicated, and the inner side cylinders on both sides are communicated and form the inner cavity of piston structure.

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.

The invention relates to the field of mechanical engineering and fluid control, in particular to a disc type symmetrical compression hydraulic pump device capable of adjusting outlet oil pressure pulsation, which comprises a transmission mechanism, an adjusting device and a pump liquid system. The motor drives the upper rotating plate and the lower rotating plate of the pump to rotate through transmission of a series of transmission mechanisms, the rotating plates push the piston to do reciprocating motion in the shell, and therefore liquid is alternately pumped into and pumped out of the four cavities. Wherein the rotary adjusting device can change the volume of the pump chamber by rotating the valve so as to achieve the purpose of controlling the liquid flow. And meanwhile, a self-locking mechanism is added for preventing the adjusting device from rebounding due to overlarge pressure of the pump chamber. Liquid can be output stably and gently, the working efficiency is high, the size is small, and variable output is achieved.