372results about "Pulse equalisation" patented technology

The present disclosure relates to a pressure and flow matching control method of a hydraulic power source for a robot, which includes S1: establishing a mathematical model of key components of the hydraulic power source; S2: constructing a trajectory planning model and kinematic model of the robot based on the mathematical model of the key components of the hydraulic power source; S3: improving a response speed by feedforward compensation and establishing a flow closed-loop control link of the hydraulic power source for the robot; S4: establishing a conversion relationship from the pressure to the flow and achieving the pressure and flow matching control of the hydraulic power source for the robot. The present disclosure completes the trajectory planning and kinematic analysis for the robot, establishes a conversion relationship between the pressure characteristics and the flow characteristics, and achieve the pressure and flow matching control of the hydraulic power source.

The utility model discloses a diaphragm type pulse damper, which belongs to the technical field of pulse dampers and comprises a diaphragm type pulse damper main body, the top and the bottom end of one side of the diaphragm type pulse damper main body are communicated with connecting ports for connecting pipelines, and a hollow pipe is fixedly arranged at the top of the diaphragm type pulse damper main body. The first connector is sleeved with the hollow pipe, a sleeve is arranged at the top of the hollow pipe, and a communicated first semicircular groove is formed between the bottom end of the sleeve and the top end of the hollow pipe. According to the diaphragm type pulse damper, the instrument, the connecting port and the pipeline of the diaphragm type pulse damper body are protected at the top of the diaphragm type pulse damper body through the sleeve and the hollow pipe, so that the firmness of connection between the pipeline and the connecting port can be improved, and leakage is prevented; and then the two semicircular shells are used for protecting and preventing leakage of the connecting port and the pipeline at the bottom of the diaphragm type pulse damper body, and the sleeve and the hollow pipe are connected through the multiple first hasps, so that the sleeve is convenient to disassemble for overhauling.

The disclosed flow cytometer includes a wavelength division multiplexer (WDM). The WDM includes an extended light source providing light that forms an object, a collimating optical element that captures light from the extended light source and projects a magnified image of the object as a first light beam, and a first focusing optical element configured to focus the first light beam to a size smaller than the object of the extended light source to a first semiconductor detector. The disclosed flow cytometer further includes a composite microscope objective to direct light emitted by a particle in a flow channel in a viewing zone of the composite microscope to the extended light source, a fluidic system and a peristaltic pump configured to supply liquid sheath and liquid sample to the flow channel, and a laser diode system to illuminate the particle in the flow channel.

A fluid management system may include a fluid pump capable of generating a pulsatile flow of fluid, a fluid pathway for transporting the pulsatile flow of fluid from a fluid source through the fluid pump to a medical device, a dampening element in fluid communication with the fluid pathway and operably independent of the fluid pump, the dampening element comprising one or more barrels, each barrel including a movable seal member disposed within the barrel and a biasing member disposed within the barrel and engaged with the movable seal member, the dampening element being responsive to pressure fluctuations of the pulsatile fluid flow to actively dampen the pressure fluctuations, and a fluid flow sensor disposed along the fluid pathway between the dampening element and the medical device to measure a flow rate of the smoothened pulsatile fluid flow in both flow directions.

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.

The invention provides a roller plunger pump. The roller plunger pump is composed of an integrated double-face cam guide rail, a flow distribution transmission shaft, a cylinder body and roller plungers. Along with rotation of the integrated double-sided cam guide rail, a roller in the roller plunger assembly rolls on the integrated double-sided cam guide rail, so that a plunger in the assembly is driven to reciprocate, the oil suction and discharge functions of a plunger cavity are achieved, oil liquid pumping is finally completed through a shaft flow distribution mechanism composed of a flow distribution transmission shaft and a cylinder body, and the function of a pump is achieved. And through the change of the flow distribution transmission shaft, the structural characteristics of the cylinder body and the flow channel, the shaft flow distribution mechanism can also realize the flow distribution function of oil, so that the pump is changed into a multi-port pump with a plurality of oil inlets and oil outlets, such as a one-oil-inlet (oil-outlet) two-oil-outlet (oil-inlet) three-port pump, a two-oil-inlet two-oil-outlet four-port pump and the like. The multi-port pump can achieve direct control over the direction and speed of hydraulic cylinders of different structure types, for example, a three-port pump can directly control an asymmetric hydraulic cylinder, a four-port pump can achieve constant-power output of the hydraulic cylinders, and a new solution is provided for a pump control hydraulic system.

The invention discloses a low-pulsation rolling wheel internal rotation parallel multi-pipe peristaltic pump which is characterized in that an extrusion mechanism, a driving mechanism, a rolling wheel rotating mechanism and a pipeline mechanism are arranged on a mounting table plate, the pipeline mechanism comprises an inlet and outlet liquid distribution pipe and a hose, and the liquid distribution pipe is arranged outside the extrusion mechanism in the vertical direction; the hoses are arranged in the extrusion mechanism in parallel at equal intervals in the vertical direction, and the two ends of the hoses are connected with the liquid distribution pipes correspondingly; the roller rotating mechanism is positioned on the inner side of the hose and connected with the driving mechanism; the driving mechanism drives the roller rotating mechanism to rotate and extrude the hoses, the single-pipe-multi-pipe-single-pipe fluid conveying process is achieved, continuous and uniform time differences exist when all the hoses are extruded and loosened, and continuous low-pulse fluid conveying is achieved. The peristaltic pump has the advantages of being low in abrasion loss of the inner wall of the hose and high in continuous filling precision, pulsation during fluid transmission is effectively reduced, and the problems that in an existing peristaltic pump, due to the fact that the inner wall of the hose is seriously abraded, a large number of particles are generated, fluid is polluted, and the continuous filling precision is low are solved.

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.

A low-pressure liquid inlet manifold and a fracturing apparatus are disclosed. The low-pressure liquid inlet manifold includes a main liquid inlet pipe and N liquid feeding pipes; the N liquid feeding pipes are arranged in sequence; each of the liquid feeding pipes includes a third end and a fourth end, the third end is communicated with the main liquid inlet pipe, and the fourth end is configured to provide low-pressure liquid to a plunger pump; and the low-pressure liquid inlet manifold further includes at least one auxiliary accumulator, which is connected with the main liquid inlet pipe and is arranged corresponding to at least one of the N liquid feeding pipes, an orthographic projection of the auxiliary accumulator on an axis of the main liquid inlet pipe overlaps with an orthographic projection of a corresponding liquid feeding pipe on the axis.

The invention discloses a device for eliminating pulsation of a peristaltic pump or a diaphragm pump, which solves the influence of pulsation on a pump body; the technical scheme adopted is: a device for eliminating pulsation of a peristaltic pump or a diaphragm pump, comprising a guide sleeve, a spring, a shell, an end cover and a reflux hose, the axial cross section of the guide sleeve is T-shaped, and a through hole is arranged axially of the guide sleeve, the spring is sleeved on the guide sleeve, two components formed by the guide sleeve and the spring are coaxially and symmetrically arranged, the large ends of the two guide sleeves are arranged oppositely, the shell is a cylindrical structure with openings at both ends, the shell matches to cover the two components formed by the guide sleeve and the spring, the two end covers are matched to be arranged at the two ends of the shell, an inlet / outlet pipe is arranged in the middle of the outer side of the end cover, the inlet / outlet pipe is correspondingly connected with the guide sleeve, a reflux port is arranged on the outer side of the end cover below the inlet / outlet pipe, and the ends of the two reflux ports are connected through a reflux hose located outside the shell.

To intermittently discharge a fluid delivered from a tube pump to piping by a constant amount.SOLUTION: A tube pump system 700 is provided, including a tube pump 100, piping 200 with a circulation flow channel for causing a fluid delivered from a tube 101 to circulate formed inside, an orifice 400 arranged at a first prescribed position P1, a selector valve 500 arranged at a second prescribed position P2, and a control part 600. The control part 600 controls the tube pump 100 and the selector valve 500 so as to synchronize delivery timing of switching the tube pump 100 from a stop state to a delivery state with circulation flow timing of switching the selector valve 500 from a cut-off state to a circulation flow state, and so as to synchronize stop timing of switching the tube pump 100 from the delivery state to the stop state with cut-off timing of switching the selector valve 500 from the circulation flow state to the cut-off state.SELECTED DRAWING: Figure 1

The disclosed flow cytometer includes a wavelength division multiplexer (WDM). The WDM includes an extended light source providing light that forms an object, a collimating optical element that captures light from the extended light source and projects a magnified image of the object as a first light beam, and a first focusing optical element configured to focus the first light beam to a size smaller than the object of the extended light source to a first semiconductor detector. The disclosed flow cytometer further includes a composite microscope objective to direct light emitted by a particle in a flow channel in a viewing zone of the composite microscope to the extended light source, a fluidic system and a peristaltic pump configured to supply liquid sheath and liquid sample to the flow channel, and a laser diode system to illuminate the particle in the flow channel.

The utility model relates to a three-plunger reciprocating process pump with high pressure resistance, which belongs to the technical field of process pumps and comprises a fixed bottom plate, a pressure regulating mechanism is arranged at the top of the fixed bottom plate and comprises a pump body fixedly mounted at the top of the fixed bottom plate, and a regulating valve is arranged on the front side of the pump body. According to the three-plunger reciprocating process pump with the high anti-pressure capacity, through the arranged pressure adjusting mechanism, the pump body is used for driving liquid to be conveyed through the conveying pipe, the liquid is buffered when passing through the buffering pipe through the conveying pipe, and when the pressure in the pump body is too large, a piston plate is pushed in a pressure relief cylinder to move; and the piston plate drives the sealing plate to move until the sealing plate moves until the pressure relief pipe is not closed any more, the pressure relief barrel and the pressure relief pipe are communicated with the outside, air in the pressure relief barrel is discharged outwards at the moment, air pressure in the pressure relief barrel and the pump body can be released, and the situation that the pump body is damaged due to the fact that the pressure intensity in the pump body is too large is avoided.

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 present invention discloses a gradient proportional valve for liquid chromatography, the gradient proportional valve comprising a plurality of inlet ports, the plurality of inlet ports being configured to receive a plurality of fluids; a manifold, the manifold being connected to each of the plurality of inlet ports, the inlet ports being configured to mix the plurality of fluids in a controlled manner to provide a liquid composition, the manifold comprising a plurality of conduits inside the manifold, each of the plurality of conduits receiving a fluid through a corresponding inlet port of the plurality of inlet ports; an actuating mechanism, the actuating mechanism having a piston, the piston being located within a drilling structure surrounding the piston, the actuating mechanism being configured to open and close at least one of the plurality of conduits in a controlled manner, wherein the piston and the drilling structure have a tight tolerance configured to produce a fluid-tight seal; and a common outlet port, the common outlet port being configured to receive the fluid composition.

A pump for pumping mud or slurry comprising: a housing (5) with a working chamber (2,4) connected to fluid inlet (6) and outlet lines (6,13), a reciprocable pumping member (1), an accumulator (39,44) fluidly connected to the working chamber (2,4) via a damper conduit (37), a controlled valve (48,49,50,53) arranged in the damper conduit (37). There is also provided a method for dampening of pressure fluctuations in a pump, comprising: operating the pump to pump a mud or a slurry; providing one or more accumulators (39,44) fluidly connected to a working chamber (2,4) of the pump; operating a controlled valve (48,49,50,53) to selectively connect and disconnect the one or more accumulators (39,44) to and from working chamber (2,4), and dampening pressure fluctuations in the working chamber (2,4) which have a frequency higher than a reciprocating speed of the pump.

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.

A hydraulic device (1) comprising a rotor (3, 9, 10, 11, 16-18, 23) and a port member (5) including a high pressure port (6) and a low pressure port (7). An outer surface (21) of the rotor faces an outer surface (22) of the port member (5) and is rotatable in a rotational direction about a rotation axis (19) relative to the port member (5). The rotor comprises a plurality of cylinders (11) angularly spaced apart from one another about the rotation axis (19) and a plurality of cooperating pistons (10) movable within each cylinder (11). The cylinders (11) communicate with respective open ends (25) at the outer surface (21) of the rotor, each of the open ends (25) alternately communicating with the high pressure port (6) and the low pressure port (7) under operating conditions. Every two consecutive cylinders (11) of the plurality of cylinders (11) are interconnected via a fluid displacement member (26). The fluid displacement member has a first opening (27) communicating with one of the two consecutive cylinders (11), a second opening (28) communicating with the other of the two consecutive cylinders (11), and a closure element (29) freely movable between the first and second openings (27, 28) and configured to substantially block either the first opening (27) or the second opening (28) when, under operating conditions, the pressure in the cylinder (11) communicating with the second opening (28) is higher or lower, respectively, than the pressure in the cylinder (11) communicating with the first opening (27). A flow resistor (30) is provided in the rotor (3, 9, 10, 11, 16-18, 23) at a position away from each open end (25), and a first opening (27) and a second opening (28) of each of two fluid displacement members (26) communicating with one cylinder (11) are in fluid communication with that cylinder (11) on the opposite side of the flow resistor (30).

The utility model discloses a water pump anti-cavitation water pump installation adjusting structure which comprises a cart, the top of the cart is provided with an installation mechanism and an adjusting mechanism, and the front side and the rear side of the surface of the cart are each provided with two positioning mechanisms. The mounting mechanism comprises a connecting base, a water pump and a support are fixed to the top of the connecting base, the water-gas inlet end of the gas-liquid separator communicates with a telescopic hose, a connecting flange is fixed to the surface of the telescopic hose, and the exhaust end of the gas-liquid separator communicates with an automatic exhaust valve. The liquid pumping end of the water pump is communicated with the liquid discharging end of the gas-liquid separator through a pipeline, and a plurality of level gauges are fixed at the top of the connecting seat; the adjusting mechanism comprises a base, and four first side plates and four second side plates are fixed to the top of the base. The horizontal degree of the installed water pump can be adjusted, so that the water pump can be in a horizontal state after being installed, the opportunity of bubble formation is reduced, and the anti-cavitation performance is improved.

A system comprising a plurality of pressure intensifier units (10, 20, 30, 40) configured to increase the pressure in a pressure vessel (2), each pressure intensifier unit (10, 20, 30, 40) comprising at least one first chamber (13, 14) and a body (15a, 15b, 15c) controllably movable back and forth at an adjustable speed by an actuation mechanism (17, 18a, 18b) within a second chamber (16) between a first end position and a second end position. A control and / or processing unit (3) is configured to control the actuation mechanisms (17, 18a, 18b) of the pressure intensifier units (10, 20, 30, 40) to perform the pressure intensification phase. During at least a part of this phase, the bodies (15a, 15b, 15c) of at least some of the intensifier units (10, 20, 30, 40) are in a first end position and a second end position at different times and / or the speed is the same for at least some of the intensifier units (10, 20, 30, 40). A method for controlling a system of intensifier units (10, 20, 30, 40) and an associated computer program, as well as a press apparatus (1), preferably an isostatic press, comprising such a system are also claimed.

Provided is a fluid equipment state monitoring device capable of making a diagnosis frequently.　A fluid equipment state monitoring device 102 diagnoses a state of a pressure accumulation device 5 in a fluid pressure circuit 101 provided with a pump 2, the pressure accumulation device 5, and a supplied-side circuit 8 to which fluid is supplied from the pump 2 and the pressure accumulation device 5. The fluid equipment state monitoring device is provided with: a pressure detection means 6 capable of detecting a pressure of a working fluid in the fluid pressure circuit 101; a timer 10a; and a determination means 10 for detecting the pressure of the working fluid at least at two arbitrary points in time by using the pressure detection means 6 and the timer 10a, and determining the state of the pressure accumulation device 5.

The present invention provides a liquid delivery pump capable of delivering a liquid with high flow rate accuracy in consideration of solvent expansion, pressure dependent leakage of the solvent, and flow rate dependent leakage of the solvent. A liquid delivery pump (1) according to the present invention includes a first plunger pump (101) having a first plunger (21), a second plunger pump (102) having a second plunger (22) and connected to the first plunger pump (101), a pressure sensor (110) configured to measure a liquid delivery pressure (P2) from the second plunger pump (102), and a control unit (10) configured to control driving of the first plunger (21) and the second plunger (22). The control unit (10) obtains a moving speed (v1) of the first plunger (21) and a moving speed (v2) of the second plunger (22) using a parameter (C1, C0) depending on the liquid delivery pressure (P2), the liquid delivery pressure (P2), and a target flow rate of the liquid. The parameter (C1, C0) is a parameter of an expression representing a relationship between the liquid delivery pressure (P2) and a flow rate (Q0) of the liquid.

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.

A guidance unit comprises a first pipe part and a second pipe part, an inner space diameter of the second pipe part is smaller than an inner space diameter of the first pipe part, causing a cross-sectional area of a second flow space perpendicular to a pipe axis of the second pipe part smaller than that of a first flow space perpendicular to a pipe axis of the first pipe part; one end of the pipe axis of the second pipe part and one end of the pipe axis of the first pipe part are connected in series with each other and spaced apart from each other by a first angle, so that the second flow space communicates with the first flow space; thereby, a pressure of an external fluid in the second flow space is greater than a pressure of the external fluid in the first flow space.

A fluid management system may include a fluid pump capable of generating a pulsatile flow of fluid, a fluid pathway for transporting the pulsatile flow of fluid from a fluid source through the fluid pump to a medical device, a dampening element in fluid communication with the fluid pathway and operably independent of the fluid pump, the dampening element comprising one or more barrels, each barrel including a movable seal member disposed within the barrel and a biasing member disposed within the barrel and engaged with the movable seal member, the dampening element being responsive to pressure fluctuations of the pulsatile fluid flow to actively dampen the pressure fluctuations, and a fluid flow sensor disposed along the fluid pathway between the dampening element and the medical device to measure a flow rate of the smoothened pulsatile fluid flow in both flow directions.