206 results about "Positive displacement pump" patented technology

A pumping system, comprising: a pump fluid end comprising a plurality of pump chambers, each pump chamber comprising a bore having a reciprocatable plunger disposed therein, a suction valve, and a discharge valve; a prime mover mechanically coupled to the fluid end [by a drivetrain] and configured to reciprocate the plungers; and a controller communicatively coupled to the prime mover, the fluid end, or both and configured to alert a user re a pump malfunction, initiate corrective action of the pump malfunction, or both in response to: (a) an indication of torque reversal during operation of the pumping system, (b) an indication of negative flow rate from the pump during operation of the pumping system, (c) an indication of leakage of (i) a single discharge valve in a 3-plunger pump or (ii) discharge valves associated with two plungers in adjacent firing order, or (d) any combination of (a)-(c).

An alternative method and apparatus for determining a chemical injection dose to a fluid system is provided. The method and apparatus uses a monitor and control system processor connected to a pressure sensor and a positive displacement pump. The monitor and control system processor determines a stroke of a positive displacement pump by measuring a low-pressure on the suction side of the pump and equates each low pressure point with a pump stroke (or the discharge of a piston volume for dual stroke pumps). The monitor and control system processor calculates the dose by multiplying the number of low-pressure points with the volume of the discharge.

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.

The invention discloses a planetary structure type flexible gear ring diaphragm pump, and belongs to the technical field of pumps, the planetary structure type flexible gear ring diaphragm pump comprises a pump body, a motor assembly is arranged in the pump body, an output shaft of the motor assembly is connected with a sun gear, a plurality of planetary gears are rotatably connected in the pump body, a flexible gear ring is arranged in the pump body, and the planetary gears are meshed and matched with the sun gear and the flexible gear ring. A fluid chamber seat is fixed at the end part of the pump body, a three-dimensional diaphragm is fixed in the fluid chamber seat, a plurality of flexible diaphragm chambers are arranged in the three-dimensional diaphragm along the outer circumferential direction of the flexible gear ring, and one-way valve groups are arranged on the flexible diaphragm chambers; planetary transmission and the positive displacement pump principle are combined, controllable deformation of a flexible component is used for replacing a traditional rigid connecting rod or eccentric wheel mechanism, and a brand-new internally-balanced driving mode is provided for fluid conveying; compared with a traditional eccentric wheel driving diaphragm pump, stress of the planet wheels on the two sides is always in internal balance, the running stability and reliability are greatly improved, and the motor cost is optimized.

A downhole pumping system for subsea use is provided. The pumping system is designed such that all fluid conduits and electrical signal conduits are internalized within the pumping assembly. This design provides a substantially constant and elongated profile for the pumping assembly. The pumping assembly includes a housing containing the power assembly, a power actuator assembly operably linked to the production fluid assembly, and a central bore extending through the pumping assembly to provide fluid communication between the power assembly and a first end of the pumping assembly. The pumping system also includes a flow distributor / connector at the first end or the pump head for providing fluid communication between the pump head and a delivery system extending from the surface to the pumping system. The communicating fluids include a high pressure power hydraulic fluid, a low pressure discharge hydraulic fluid, and a pressurized production wellbore fluid.

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.

A device (7) for regulating the delivery volume of a positive displacement pump (1) comprises a control piston (8) displaceable in a recess (9) and a cam ring (4), via the position of which the delivery volume of the positive displacement pump (1) can be adjusted. A pressure switching valve (12) is arranged in a leakage line (11) connected to the recess (9). This pressure switching valve closes the leakage line (11) when a specific pressure acting on it is exceeded.

A positive displacement pump system can include a fluid end block, which can be configured to provide a pumping chamber and control a flow of a fluid through the positive displacement pump system. The fluid end block can include a first cylindrical wall defining a plunger bore extending partially through the fluid end block and a second cylindrical wall defining a fluid conveying cross bore that intersects the plunger bore defining a bore intersection rim. A portion of the first bore intersection rim can include a first toroidal surface.

The invention relates to a positive displacement pump, in particular a vane pump, for pumping a fluid for a consumer of a steering system, with a suction side and a pressure side. The positive displacement pump has at least one cam ring (2), a rotor (3), a drive shaft (4) with an axis of rotation (x), a plurality of vanes (5), a control plate (6a), an end plate (6b), and / or a cover (11). A cylindrical surface of the rotor (3) has slots extending at least approximately radially across the width of the cylindrical surface, in which the vanes (5) are slidably arranged, the vanes (5) being guided along the inner contour of the cam ring (2) when the rotor (3) rotates. The control plate (6a), the end plate (6b), and / or the cover (11) includes a rear vane channel (9) which interacts with rear vane spaces to press the vanes (5) against the cam ring (2). The control plate (6a) and the front plate (6b) respectively.The cover (11) encloses the cam ring (2) and the rotor (3) axially between them. A sealing surface (10) is defined by the contact surface of one of the end faces of the rotor (3) with the control plate (6a) and with the end plate (6b) or the cover (11), wherein the sealing surface (10) extends radially over a sealing section (10a), in particular between the drive shaft (4) and the rear wing channel (9). According to the invention, the sealing section (10a) of at least one of the sealing surfaces (10) increases in the direction from the suction side to the pressure side, such that the sealing surface (10) is narrower in the radial direction at the transition from the pressure side to the suction side than at the transition from the suction side to the pressure side.

A material calculator for a truck to deliver a predetermined quantity of brine per mile driven by the truck for a known route of miles independent of and proportional to truck speed, wherein the truck carries a known number of gallons of brine and a known number of pounds of salt. The material calculator has a processor accepting entry values of route miles to be driven, number of times the route of miles is to be driven, number of gallons of brine carried by the truck, and the number of pounds of salt carried by the truck. The processor has software for calculating dispensing of the brine and salt so that each is exhausted when the route is completed. A hydraulic pump pumps hydraulic fluid to a variable flow positive displacement pump to implement the calculated number of gallons of brine per mile to be dispensed for the known route.

To provide a thermal decomposition device that separates gas in either a thermal decomposition part or a residue discharging part which discharges residue from the thermal decomposition part more securely, by which a gas volume coexisting with residue can be reduced on a post-stage of the residue discharging part.SOLUTION: A thermal decomposition device 1 comprises: a thermal decomposition part 20 which receives and thermally decomposes raw resin; a thermally decomposed gas separation part A which separates thermally decomposed gas generated by thermal decomposition in the thermal decomposition part 20; a gas treatment part 100 which treats thermally decomposed gas sent through the thermally decomposed gas separation part A; and a residue discharging part 30 which discharges undecomposed residue generated in the thermal decomposition part 20. The residue discharging part 30 includes a gear pump (positive displacement pump) 60 which absorbs and ejects undecomposed residue from an outlet part 23f of the thermal decomposition part 20.SELECTED DRAWING: Figure 2

A positive displacement pump system can include a fluid end block, which can be configured to provide a pumping chamber and control a flow of a fluid through the positive displacement pump system. The fluid end block can include a first cylindrical wall defining a plunger bore extending partially through the fluid end block and a second cylindrical wall defining a fluid conveying cross bore that intersects the plunger bore defining a bore intersection rim. A portion of the first bore intersection rim can include a first toroidal surface.

Telescoping, self-driving, and laterally-pushing atherectomy devices are provided, each having a flexible sheath, a cutter with helical flutes, and a drive assembly. The drive assembly can have a flexible driveshaft rotatably translational with the lumen of the flexible sheath, a positive displacement pump to transport cut tissue, and a flexible drive shaft that can be longer than the flexible sheath for a reversible telescoping of the drive assembly from the lumen of the flexible sheath. The positive displacement pump can be a screw pump having a drive screw portion exposed for contact with a vascular lumen for a self-driving of the device through the vascular lumen. A reversibly-expandable, lateral pushing member can be included at the distal end of the flexible sheath for a lateral pushing of the cutter. Improved cutting heads, and methods of making them, are provided for cutting a combination of soft and hard plaque.

An electric propulsion machine for propelling a boat. The electric propulsion machine includes a motor provided in an upper portion of the electric propulsion machine, a propeller shaft provided in a lower portion of the electric propulsion machine, a propeller provided in the propeller shaft, a drive shaft extending in an upper-lower direction and configured to transmit rotation of the motor to the propeller shaft, and a first non-positive displacement pump provided in the propeller shaft and configured to supply cooling water to the motor, the cooling water cooling the motor.

A liquid delivery system for a treatment device includes first and second reservoirs (104) containing first and second liquids (106) and first and second positive displacement pumps (112) operably coupled to the first and second reservoirs (104), respectively. The first positive displacement pump (112) is configured to pump (200) the first liquid (106) therethrough at a first flow rate and the second positive displacement pump (114) is configured to pump (200) the second liquid (110) therethrough at a second flow rate. A motor (116) is operably coupled to the first and second positive displacement pumps (112) to drive simultaneous operation thereof.

The utility model relates to a double-channel fluid adjustable fixed flow ratio device which comprises two unpowered rotary displacement pumps, one of the two rotary displacement pumps takes first fluid as pushing power, and the other rotary displacement pump takes second fluid as pushing power. The output shafts of the two rotary displacement pumps are connected through a common speed change device, so that the two rotary displacement pumps operate at a determined rotation speed ratio, and the two fluids are conveyed at a determined flow ratio; the rotary positive displacement pump is provided with two sets of rotating parts, each set of rotating part comprises a waist wheel, a waist wheel shaft and a synchronous gear, and the waist wheel shaft and the synchronous gear are coaxially arranged. The two mutually connected rotary positive displacement pumps run at a set rotating speed ratio and fixed inlet and outlet pressure, so that the constant flow ratio of two fluids is ensured, additional power input is not needed, pure mechanical matching is adopted in the whole process, a complex automatic control system is not needed, the operation process is simplified, and the cost is reduced.

The invention discloses a reciprocating displacement pump fluid end for conveying trace super media, which comprises a pump body, a motor arranged on the pump body, a worm connected to the output end of the motor, a turbine rotatably connected to the inside of the pump body, a plunger slidably connected to the pump body, an accommodating cavity, a liquid suction one-way valve and a liquid discharge one-way valve arranged on the pump body, and a lantern ring connected to the pump body, an axial flow channel is arranged in the lantern ring; the pump body is connected with a fan-shaped valve seat, a fan-shaped cavity for heat conduction liquid to flow is formed in the fan-shaped valve seat, an inlet flow channel is formed in one end of the fan-shaped valve seat, an outlet flow channel is formed in the other end of the fan-shaped valve seat, and an electric heating wire for heating the heat conduction liquid is wound around the inlet flow channel. One end of the axial flow channel communicates with the inlet flow channel, and the other end communicates with the outlet flow channel; a swing plate is rotationally connected into the fan-shaped valve seat. A cylinder body is arranged outside the fan-shaped valve seat, a piston is connected into the cylinder body in a sliding mode, and an intercepting plate is connected to the piston. The reciprocating type displacement pump fluid end for conveying the trace super-temporary medium is suitable for low-temperature occasions, the phase state of the medium is constant, and conveying is more stable.

The present application relates to an American Society of Mechanical Engineers (ASME) Bioprocessing Equipment (BPE) compliant continuous stirred tank reactor (CSTR) array designed for continuous chemical, pharmaceutical, and biotechnological applications. Each array features two to five CSTRs incorporating a comprehensive recirculation and output flow system with a positive displacement pump, a three-way recirculation diverter valve, and control valves for precise management of output and waste allowing handling of solutions, suspensions, and mixtures of fluids, solids, and gases. Additional features support easy maintenance and real-time process monitoring, enhancing operational flexibility and control. This CSTR system is tailored to meet stringent industry standards and improve process efficiency.

A twin-fluid nozzle spray apparatus according to one aspect includes a gas regulator that outputs compressed gas at a predetermined pressure in a compressed-gas supply system, a positive displacement pump that includes a relief valve configured to feed pressurized liquid at a pressure exceeding a predetermined pressure in a pressurized-liquid supply system back to a liquid supply side, and outputs the pressurized liquid, a liquid regulator or a needle valve that outputs the pressurized liquid output by the positive displacement pump while maintaining a pressure of the pressurized liquid at a discharge pressure having a predetermined value, and a twin-fluid nozzle that mixes and sprays the compressed gas output by the gas regulator and the pressurized liquid output by the liquid regulator or the needle valve.

Tinting machine (1) for metering, dispensing and mixing tinting pastes to prepare a paint of a desired colour or quality. The tinting machine comprises a plurality of dispense units (8), each dispense unit comprising a container (4) for holding a tinting paste and a pump (9). The dispense units are selectively movable to a dispense position. The tinting machine further comprises an actuator (20) engaging a selected one of the dispense units when it is in the dispense position. The actuator comprises a main gripper (40) for engaging the pump for fast dispensing, and a secondary gripper (50) for engaging the pump for accurate dispensing.

A fluid retention apparatus for a positive displacement pump used to transfer fluid from a supply to a target comprises (i) a sealing device configured to be received in a packing chamber of the pump and to matably receive a piston of the pump therethrough that reciprocates in a transfer chamber for generating suction and expulsion of the fluid for transference thereof, and (ii) a leak containment device configured to contain leaked fluid passed from the transfer chamber. The sealing device features a tubular body made of wearable and substantially deformation-resistant composite polymer material and the passageway which is shaped with opposite end portions of reduced diameter to form a sealing friction fit with the piston. The leak containment device features a cavity fluidically communicated with the sealing device's passageway and receiving the piston therethrough, and a drain port in fluidic communication with the cavity for releasing the leaked fluid.

One or more techniques and / or systems are disclosed for a positive displacement pump. The pump includes a pump housing having an inlet and an outlet. An internal gear assembly is arranged along a fluid pathway between the inlet and outlet and includes a shaft, a rotor gear, and an idler gear. The rotor gear is operably coupled to a first end of the shaft. A first bearing is arranged around the shaft. The seal holder plate is arranged between the first bearing and the first end of the shaft. A first sealing element is concentrically arranged between the shaft and the seal holder plate to seal and isolate the first bearing from fluid traveling between the inlet and the outlet. The first bearing, the seal holder plate, and the first sealing element are arranged in a packing box portion of the pump housing that is isolated from the fluid.

Described herein are embodiments of a drive head for use with positive displacement pumps. In one embodiment, a drive head for use with a pump comprises a central shaft having a first end and a second end; first and second drive rod connection points coupled to the central shaft proximate the first and second ends, the first and second drive rod connection points being located radially outside of a centerline of the central shaft; first and second drive rods coupled to the first and second drive rod connection points; and a central support member coupled to the central shaft between the first and second drive rod connection points.

The present invention relates to the field of mechanical transmission technology, and particularly relates to a multi-stage retardation device. The multi-stage retardation device includes: a sealing assembly, a stator, a rotor assembly, and a medium adjustment assembly; there is liquid in the sealing assembly, the stator and the rotor assembly are combined into a positive displacement pump, a throttle orifice is provided at the liquid outlet of the positive displacement pump, and the medium adjustment assembly changes the throttling damping effect of the throttle orifice by adjusting the viscosity of the medium. The rotor assembly is connected to an external component to be retarded, and the external component to be retarded drives the rotor assembly to rotate, generating high pressure at the liquid outlet, and generating resistance under the throttling effect of the throttle orifice. The mechanical energy of the rotor assembly is converted into the pressure potential energy of the liquid and then into heat energy to generate braking force. The multi-stage retardation assembly provided by the present invention uses the mechanical energy of the component to be retarded itself for energy conversion to achieve retardation braking, and has remarkable energy-saving effects.

Provided are a fluid driving mechanism for a positive displacement pump, a positive displacement pump, and a working method for a positive displacement pump. The fluid driving mechanism comprises: a static disc (1), which is provided with a receiving cavity formed therein, and a guide portion (2) provided on a side wall of the receiving cavity; and a movable disc (3), which is arranged in the static disc (1) in a swinging manner, wherein a first outer cavity (5) and a second outer cavity (6) are formed between the movable disc (3) and the static disc (1), a moving portion (4) is arranged on the movable disc (3), the moving portion (4) is movably engaged with the guide portion (2), and a first inner cavity (7) and a second inner cavity (8) are formed between the moving portion (4) and an engagement portion, thereby prolonging the service life of the fluid driving mechanism.

To provide a non-positive displacement pump capable of reducing slide resistance between a pump case and an impeller and improving pump performance.SOLUTION: An impeller 40 has a plurality of blade parts 62 and a plurality of through-flow paths 63 formed in a circumferential row radially inward of an outer peripheral surface 40a. A pump case 41 has a bracket 45, an inlet 42, a suction port 53 formed in the inlet 42, and a discharge port 48 formed in the bracket 45. An outside recess part 73 having an annular shape when viewed from a rotational axis direction is formed on a second slide contact surface of the inlet 42 radially outward of the blades parts 62 and the through-flow paths 63 and at a position overlapping with the outer peripheral surface 40a of the impeller 40 in the rotational axis direction.SELECTED DRAWING: Figure 4

The invention discloses a continuous totally-enclosed solid-liquid separation system which comprises a preheater, a film evaporator, a continuous vacuum suction filter, a positive displacement pump, a horizontal double-shaft dryer, a double-spiral discharging machine and a stock bin, by arranging the preheater, the film evaporator, the continuous vacuum suction filtration machine, the displacement pump, the horizontal double-shaft drying machine, the double-spiral discharging machine and the stock bin which are communicated in sequence, continuous treatment of materials is achieved, efficiency is improved, solid-liquid separation quality is improved, the materials are primarily treated in the preheater, the film evaporator and the continuous vacuum suction filtration machine, the solid content of the materials is increased, and the solid content of the materials is reduced. And then fine solid-liquid separation is carried out through the horizontal double-shaft drying machine, on one hand, the separation quality can be improved, on the other hand, the cost can be reduced, all the components in the embodiment are communicated through pipelines, the whole solid-liquid separation process of the materials can be kept closed and in a whole-process negative pressure state, the sealing performance is improved, harmful gas and liquid leakage is avoided, and the device is more environmentally friendly and safer.

This invention, entitled "An Built-in Power Device, a Dexterous Finger, and Its Applications," belongs to the field of robotic dexterous hand technology. The technical problems it aims to solve are: existing robotic dexterous fingers suffer from problems such as external power devices, complex structures, large size, low power density and slow response due to the need for reducers in motor drives, poor stiffness and easy wear of tendon-wire transmissions, large return gaps, unstable positioning and grasping, and difficulty in directly and effectively driving joint rotation through the micro-displacement of piezoelectric ceramics. The key technical solution is: a built-in power device consisting of a piezoelectric ceramic power system and a hydraulic transmission system. The piezoelectric ceramic utilizes its inverse effect to achieve direct electro-mechanical conversion, providing mechanical power to the hydraulic transmission system. The hydraulic pump in the hydraulic transmission system is a reciprocating positive displacement pump, which provides pressurized oil to the hydraulic circuit through the periodic change of the working chamber volume.

The invention discloses an adjustable reciprocating positive displacement pump, which belongs to the field of reciprocating pumps and comprises a base, a pump body is fixedly mounted on the base, a pump cavity is arranged on the pump body, and a piston is slidably mounted in the pump cavity. According to the scheme, through cooperation of the threaded rod and the threaded cylinder, the position of the push plate can be changed, the position of the adjusting plate can be changed when liquid is discharged, then the communication volume of the adjusting cavity and the pump cavity is changed, the adjusting plate can be driven to get close to the piston direction when the pump cavity sucks the liquid under negative pressure, and then the pump cavity and the adjusting cavity are not communicated any more; when the liquid is discharged from the pump cavity, the adjusting plate is driven to reset and is attached to the push plate, that is, the discharge amount of the pump cavity is the volume obtained after the volume of the adjusting cavity communicated with the pump cavity is subtracted from the liquid amount sucked by the pump cavity at the moment, and that is, the flow can be adjusted by rotating the threaded cylinder; therefore, the displacement pump does not need to be closed for adjustment, and the effect of improving the working efficiency of the displacement pump is achieved.

Embodiments of the present disclosure relate to techniques, processes, devices or systems for pump devices. In one approach, a wearable drug delivery device may include a reservoir configured to store a liquid drug, the reservoir including a housing including an outer wall defining an interior chamber, a sealing member, and a slit through the housing, wherein the sealing member is configured to seal the slit. The wearable drug delivery device may further include a delivery pump device including a drive mechanism coupled to the reservoir for driving the liquid drug out of the reservoir, the drive mechanism including a piston head disposed within the interior chamber of the housing, and a lead screw coupled to a drive nut, wherein the drive nut comprises a blade adjacent the piston head, and wherein the blade is positionable through the slit of the housing.