486results about "Rotary/oscillating piston combinations" patented technology

A linear actuator system includes a linear actuator and an integrated pump assembly connected to the linear actuator to provide fluid to operate the linear actuator. The integrated pump assembly includes a pump with two fluid drivers, each fluid driver comprising a prime mover and a fluid displacement assembly to be driven by the prime mover such that fluid is transferred from a first port of the pump to a second port of the pump. The pump assembly also includes two valve assembles to isolate the pump from the system. The linear actuator system also includes a controller that establishes the pump in a normal mode of operation in which the prime movers are independently driven and switches to a fail-safe mode of operation in which only one prime mover is operated.

The disclosure relates to a screw pump (2) comprising: a casing (3) with an inlet (30), an outlet (31) and a flow chamber (32) between the inlet and the outlet, and at least two screws (4, 5, 6) housed in the flow chamber to force a fluid flow 5 through the flow chamber from the inlet to the outlet, wherein each screw (4, 5, 6) comprises a release coupling (45, 52, 62) to restrict, when in use, the rotation of the screw when it is being extracted from a molding tool.

Screw pump (2) comprising: a casing (3) with an inlet (30), an outlet (31) and a flow chamber (32) between the inlet and the outlet; at least two screws (4, 5, 6) housed in the flow chamber to force a fluid flow through the flow chamber from the inlet to the outlet; and a flexible coupling (11) connected to one of the screws to couple the screw to a drive motor (10).

An electronic oil pump comprises a first rotor assembly, a stator assembly, an electronic control board assembly, an isolating member and a heat conductor, wherein the first rotor assembly is located in the first cavity of the electronic oil pump; the heat conductor comprises a first part and a second part, the first part is located in the second cavity of the electronic oil pump, and the second part is located in the third cavity of the electronic oil pump; the electronic control board assembly comprises a substrate and a temperature sensing unit, the substrate comprises a first hole, an upper plate layer, a lower plate layer and at least one metal layer, and part of the second part is located in the first hole; the temperature sensing unit is located on one side of the second part, and there is a preset distance between the temperature sensing unit and the second part; the metal layer closest to the temperature sensing unit is defined as the nearest metal layer, and the temperature sensing unit is projected in a direction parallel to the upper surface of the nearest metal layer, and at least part of the projection of the temperature sensing unit is located in the nearest metal layer, and the temperature sensing unit can detect the temperature of the nearest metal layer or the temperature sensing unit can detect the temperature of the upper plate layer or the lower plate layer in contact with the nearest metal layer; this is conducive to simplifying the system structure.

The disclosure relates to a screw pump (2) comprising: a casing (3) with an inlet (30), an outlet (31) and a flow chamber (32) between the inlet and the outlet; and at least two screws (4, 5, 6) housed in the flow chamber to 5 force a fluid flow through the flow chamber from the inlet to the outlet; wherein the casing (3) comprises a shell (33) within which an insert (34) defining the flow chamber is housed.

The utility model provides a composite spherical pump which comprises a stator, a first spherical inner cavity and a second spherical inner cavity which are arranged up and down are arranged in the stator, and a first spherical rotor and a second spherical rotor are arranged in the first spherical inner cavity and the second spherical inner cavity respectively. The stator is provided with a first liquid suction hole and a first liquid discharge hole which are communicated with the first spherical inner cavity, and is also provided with a second liquid suction hole and a second liquid discharge hole which are communicated with the second spherical inner cavity; a driving shaft of the first spherical rotor is connected with a second spherical rotor; a driving shaft of the second spherical rotor extends out of the lower part of the stator and is connected with a driving part; the composite spherical pump provided by the utility model is used for simultaneously sucking two media which are easy to react, the mixing proportion of the two media can be accurately controlled, the two media can be prevented from reacting due to internal leakage in different cavities, and meanwhile, the composite spherical pump is small and exquisite in structure and can save the installation space; on the other hand, the torque fluctuation of the driving motor is small and the torque peak is reduced.

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

An operable implant adapted for implantation into a patient's body. The operable implant comprises an operating device and a body-engaging portion, the operating device comprising an electric motor including a stationary part containing a plurality of coils and a movable part containing a plurality of magnets, such that sequential energization of the coils magnetically propels the magnets and, thereby, the movable part. The operating device further comprises an encapsulation adapted to hermetically encapsulate the coils of the stationary part, thereby forming a seal between the stationary part and the movable part, which is propelled by the contained magnets, such that the coils of the stationary part are sealed from bodily fluids when implanted.

This invention discloses a scraper-type permanent magnet synchronous electromagnetic pump. The pump body has a pump chamber with an opening at one end. An end cover is sealed and fixed to the opening end of the pump chamber. A cam rotor is installed in the pump chamber. The rotating shafts at the front and rear ends of the cam rotor are rotatably connected to the end cover and the pump body, respectively. One end of the upper scraper and the lower scraper are fixed to the inner wall of the pump chamber by upper and lower torsion springs, respectively, dividing the pump chamber into a low-pressure chamber on the left and a high-pressure chamber on the right. The upper and lower torsion springs apply a spring force pointing towards the axis of the cam rotor to the upper and lower scrapers, respectively. The volume of the low-pressure chamber is larger than that of the high-pressure chamber. A winding is embedded in the inner wall at the bottom of the pump chamber or the inner surface of the end cover. Correspondingly, a pair of permanent magnets is embedded in the end face of the cam rotor near the winding. When the cam rotor rotates, the upper and lower scrapers swing, and their free ends always press against the outer circumferential surface of the cam rotor, scraping the fluid on the surface of the cam rotor. The cam-blade rotor, in cooperation with the upper and lower scrapers, improves the overall stability.

The utility model relates to an electronic oil pump applying a hydrostatic bearing, which comprises an oil pump shell, a rotor shell and a pump cover are sequentially mounted on one side of the oil pump shell, a controller shell, a controller cover and the oil pump shell are sequentially mounted on the other side of the oil pump shell, a rotor assembly is rotatably mounted in the rotor shell, and a stator assembly is arranged on the periphery of the rotor assembly. A rotor shaft is arranged in the middle of the rotor assembly, one side of the rotor shaft is sleeved with an inner rotor, an outer rotor is arranged on the periphery of the inner rotor, a high-pressure oil outlet cavity and a low-pressure oil return cavity are formed between the inner rotor and the outer rotor, the high-pressure oil outlet cavity and the low-pressure oil return cavity are communicated through an oil duct, and the oil duct flows through the rotating contact faces of the rotor shell, the oil pump shell and the rotor shaft. The utility model provides pressure lubrication while avoiding the risk of oil shortage for the rotation of the rotor, and is more reliable.

A kind of converging type pressure increasing gerotor pump.This application relates to the improvement of gerotor internal gear pump structure.By staggered compensation, avoid the flow pulsation caused by pump cavity volume change, and then realize the output pressure boost, and run smoothly.This application includes high pressure pump body, low pressure pump body and main shaft, the axis of outer rotor A and outer rotor B is arranged on one side of the main shaft, the axis of high pressure pump outer rotor is arranged on the other side of the main shaft, and the axis of outer rotor A is + alpha angle relative to horizontal line, the axis of outer rotor B is - alpha angle relative to horizontal line, alpha = 360 ° / 2N, N is the number of inner rotor teeth.This application adopts the ingenious design of rotor eccentric installation, realizes the pressure boost of pump, and the staggered compensation solves the flow pulsation caused by pump cavity volume change, provides stable flow for high pressure booster pump inlet.This application can be widely used in new energy vehicles, wind power, air conditioning, generator, industrial production, chemical industry, petroleum, metallurgy, water treatment and other fields, for conveying various liquids.

The utility model relates to a pump body structure and an ink path system of an ink-jet printer. The pump body structure comprises a first pump body unit, a second pump body unit and a third pump body unit, the second pump body unit is provided with a pumping-out mode and a pumping-in mode, and the working modes of the first pump body unit and the second pump body unit are set to be opposite; the medium flow channel is arranged between the first pump body unit and the second pump body unit and used for circulation and exchange of fluid between the first pump body unit and the second pump body unit. And one of the first pump body unit and the second pump body unit in the pump-out mode pumps fluid to the other one in the pump-in mode through the communicating flow channel. Compared with the prior art, the utility model improves the pumping suction force of the pump body and prolongs the service life at the same time.

An electronic oil pump comprises a stator assembly and an electric control board assembly, the stator assembly is electrically connected with the electric control board assembly, the stator assembly comprises a stator core and a winding, the stator core can provide support for winding winding; the electronic oil pump comprises a shielding piece, the stator assembly, at least part of the shielding piece and the electric control board assembly are distributed along the axial direction of the electronic oil pump, at least part of the shielding piece is located between the stator assembly and the electric control board assembly; the material of the shielding piece is a conductive metal material, at least part of the shielding piece covers at least part of the winding; thus, it is beneficial to reduce the influence of the electromagnetic wave generated by the winding on the performance of the electric control board assembly.

To provide an electric pump which enables improvement of cooling efficiency of a motor part.SOLUTION: One embodiment of an electric pump of the invention includes: a motor part having a shaft rotatable around a center axis; a pump part which is connected to one end in an axial direction of the shaft and driven by power of the motor part to pump a fluid; and a housing which houses the motor part and the pump part. The housing is provided with: a motor chamber in which the motor part is disposed; a pump chamber in which the pump part is disposed; a supply path for causing the fluid to flow from the pump chamber to the motor chamber; and a return path for returning the fluid from the motor chamber to the pump chamber. The shaft has a hollow part which is open in the motor chamber at a first opening and is open in the pump chamber at a second opening. The pump part has: a suction port for suctioning the fluid from the outside; and a discharge port for discharging the fluid to the outside. The housing has a passage part connecting the second opening with the suction port. The return path is provided at the hollow part and the passage part.SELECTED DRAWING: Figure 1

The invention relates to a liquid pump driven by a PMDC motor and a motor control system and method.The liquid pump comprises a pump shell used for being connected with the PMDC motor, an upper cover connected with the pump shell and provided with an opening allowing liquid to circularly enter and exit, and a shaft seal used for being connected with a driving shaft of the PMDC motor in a sleeving mode and arranged in the pump shell; the inner gear rotor is arranged in the pump shell and used for being connected with the driving shaft, the outer gear rotor is eccentrically connected with the inner gear rotor in a sleeved mode, and the first sealing ring and the second sealing ring are connected to the upper cover and the pump shell in a clamped mode respectively. The liquid pump can be driven by the PMDC motor, liquid can be effectively prevented from entering the PMDC motor through multi-position sealing design, and the liquid pump can be applied to various cooling systems and lubricating systems; meanwhile, the PMDC motor is controlled to enter a low-power, low-current and low-voltage cold start mode in a mode of gradually increasing the input power, potential safety hazards can be effectively avoided, and the service life of equipment is prolonged.

A gerotor pump (10) with an inner rotor (12) and a rotatably supported outer rotor (14), and characterized in that the outer rotor (14) is elastically supported in its axial direction and is pre-tensioned towards the inner rotor (12).

The application discloses a device of a circular ring type plunger variable hydraulic pump, which comprises a base, a curved rod, a piston, a swing rod two, a rear cover, a connecting rod five, a connecting rod six, a compression bolt, a connecting rod eight and a main shaft two. The base is fixedly connected with the rear cover through welding. The outer side of the rear cover is in butt joint with a sealing gasket and a front cover, and the sealing gasket, the front cover and the rear cover are fixed through bolts. The device of the circular ring type plunger variable hydraulic pump can reduce the volume of the whole device in the axial direction while pumping oil. Only a given signal is needed to operate the driving circuit of the stepping motor, so that the stepping motor rotates at a corresponding speed and rotates a corresponding number of turns. The gear installed on the stepping motor drives the rack to move a corresponding distance, so that three groups of hinges move, the distance of the linear motion of the other end of the connecting rod two is changed, the included angle of the connecting rod one and the connecting rod three is changed, the swing angle of the swing rod one and the swing rod two is changed, and then the movement distance of the piston is changed, so that the variable oil pumping is realized.

The invention discloses a motor element of a four-quadrant small-displacement internal gear pump. The motor element comprises a rear cover, a front cover body and a pump motor assembly, the rear cover and the front cover body are assembled and fixed, and the pump motor assembly is arranged in a shell of the front cover body. The invention has small displacement design and high rotating speed adaptability, is suitable for being directly connected with a high-speed motor, and reduces a speed reducing mechanism. And the device is compact and light in weight, and is suitable for mechanical-electrical-hydraulic integrated systems (such as robots and aviation hydraulic pressure) with limited space. The small displacement means lower rotational inertia, and the dynamic response is faster.

An electric oil pump comprises a generated rotor (gerotor) inside a motor in a pump housing, with a ball bearing 7 between the motor and the gerotor. The motor comprises a stator assembly 8, 9 and a motor rotor 2. The gerotor comprises an inner gear 6, an outer gear 3 and a pin 5. The motor rotor is hollow and installed within the stator assembly, and the outer gear is inside the motor rotor. The pin is press-fitted inside a shaft sleeve 4 at a centre of the motor rotor, and the inner gear is press-fitted outside the shaft sleeve. The ball bearing may be between the motor rotor and the outer gear, and at an end of the gerotor. The pump housing may have an oil inlet 101 and outlet 102. The motor rotor and outer gear may drive the inner gear to pressurize a cooling oil from the oil inlet so that a first portion flows to the stator assembly through the pin, and flows back to a first pressure area after heat-exchange, and a second portion is discharged directly from the outlet after passing through a second pressure area.

This invention provides an integrated electric motor pump and an automobile. The gear housing has a structural cavity, and an internal meshing gear assembly is disposed within the structural cavity. The internal meshing gear assembly has a first oil chamber and a second oil chamber. The gear housing is mounted on a motor housing. A rotor shaft passes through a portion of the gear housing from inside the motor housing and extends into the structural cavity. The gear housing is radially supported on the rotor shaft by a housing bearing. The gap between the motor housing, the gear housing, and the rotor shaft forms an oil reservoir. An oil guide groove is formed on the inner ring of the gear housing opposite the rotor shaft, connecting the structural cavity and the oil reservoir. The gear housing also has a first channel and a second channel that connect the oil reservoir to the first and second oil chambers, respectively. A first check valve is installed in the first channel, and a second check valve is installed in the second channel. This invention can improve the problem of high noise in integrated electric motor pumps.

A gear pump assembly (100, 100') includes an inlet (102) configured to receive a fluid, an outlet (104), a main drive shaft (106), a secondary gear stage (108), and a primary gear stage (110) configured to pump the fluid from the inlet (102) to the outlet (104). The secondary gear stage (108) includes a secondary driver gear (126) driven by the main drive shaft (106), a secondary driver bearing block (136) disposed adjacent to and supporting the secondary driver gear (126), a secondary driven gear (130) meshed with and driven by the secondary driver gear (126), a secondary driven bearing block (138) disposed adjacent to and supporting the secondary driven gear (130), and a driver bore portion (150) receiving the secondary driver bearing block (136) therein. A fluid passage (154) fluidly communicates the primary gear stage (110) with the driver bore portion (150).

To provide a technique capable of reducing the manufacturing costs of an electric liquid pump and the weight of the electric liquid pump.SOLUTION: An electric liquid pump 1 comprises: an electric motor 2 having a motor rotor 20 and a stator 25; a liquid pump 3 having an inner rotor 30 and an outer rotor 35; a motor case 4 formed into a box-shape, and having therein a first housing chamber 41 housing the stator 25, a second housing chamber 42 housing another axial part of the motor rotor 20, and a partition wall 45; and a body 5 having a bearing part supporting one axial part of the shaft 21. In the shaft 21, a large-diameter sleeve 21s at one axial end and a general shaft part 21g serving as a remaining axial part and having a smaller diameter than that of the sleeve 21s are integrally molded of the same material. The magnet part 23 is made of a bond magnet, and integrated with the sleeve 21s.SELECTED DRAWING: Figure 2

A pump assembly (10) of an aircraft engine includes a pump housing (36), a first pump stage (12) positioned in the housing (36) and including two first stage rotating elements (20, 22) meshed at a first mesh location (24), and a second pump stage (14) positioned in the housing (36) and including two second stage rotating elements (26, 28) meshed at a second mesh location (30). The first stage rotating elements (20, 22) are retained at respective shafts (16, 18) by one or more woodruff keys (44), and at least one second stage rotating element (26, 28) of the two second stage rotating elements (26, 28) is secured at its respective shaft (16, 18) via a spline connection (70) of the at least one second stage rotating element (26, 28) to the respective shaft (16, 18).

The utility model relates to the technical field of gas-liquid mixed transportation pressurization, in particular to a gas-liquid mixed transportation pressurization device which comprises a shell, a front cover and a rear cover, the front cover is installed on one side of the shell, the rear cover is installed on the side, away from the front cover, of the shell, an inlet is formed in one side of the upper portion of the shell, and an outlet is formed in the other side of the upper portion of the shell. When the supercharging device is used, the eccentric shaft drives the cock to slide tightly close to the interior of the shell, the shell forms a closed cavity which changes periodically, negative pressure is generated in the shell to suck a medium, the cock extrudes the medium in the shell to achieve the purpose of supercharging conveying, and the cock is tightly attached to the shell to reduce mechanical friction. And large torque is provided through an eccentric structure formed by the eccentric shaft, the cock and the interior of the shell, operation noise is reduced, and noise pollution generated when the device is used is reduced.

A sliding-vane pump (10) is described, with a housing (16) in which a cylindrical fluid chamber (14) is formed, a conveyor rotor (28) which is rotatable in the fluid chamber (14) and is guided on a circumferential wall (30) of the fluid chamber (14), wherein in the fluid chamber (14), the conveyor rotor (28) delimits at least one conveyor chamber (32, 33, 34, 35, 36) having a volume which is variable by rotation of the conveyor rotor (28), and with a drive motor (22) having a rotor (24) which is attached rotationally fixedly on a drive shaft (26), wherein the conveyor rotor (28) is arranged positionally fixedly on the drive shaft (26) and the drive shaft (26) is radially mounted in the housing (16) by means of the conveyor rotor (28).

The present disclosure relates to a screw pump 2, comprising a casing 3 having an inlet 30, an outlet 31 and a flow chamber 32 between the inlet and the outlet, and at least two screws 4, 5, 6 accommodated in the flow chamber and pushing out a fluid flow through the flow chamber from the inlet to the outlet, wherein at least one (4) of the screws comprises a central shaft 40 made of a first material, and the screw is formed from a second material on the central shaft 40.

An exemplary gear pump comprising: a pump housing having a hydrostatic fluid groove; an outer bushing mounted on the pump housing and having a hydrostatic fluid slit fluid connection to the hydrostatic fluid groove of the pump housing; a drive flange, the drive flange mounted on the outer bushing so as to be inserted radially between the pump housing and the drive flange; a ring gear connected to the drive flange and configured to rotate with the drive flange; and a pump pinion, the pump pinion having an outer tooth row that engages with an inner tooth row of the ring gear and is positioned within the ring gear to draw in and discharge fluid as they rotate, the fluid being supplied to the hydrostatic fluid groove of the pump housing and communicating through the hydrostatic fluid slit fluid to the interface between the drive flange and the outer bushing to facilitate the rotation of the drive flange relative to the pump housing.

An eccentric screw pump (18) for metering a medium (M, M1, M2), having at least two stators (19), at least two rotary units (8), wherein, during operation of the eccentric screw pump (18) for metering the medium (M, M1, M2), each of the at least two rotary units (8) interacts with one of the at least two stators (19), a pump housing (15), to which the at least two stators (19) are attached and through which at least portions of the at least two rotary units (8) run, wherein the pump housing (15) has a tank portion (16) for receiving the medium (M, M1, M2), and at least two seal means (30) for sealing the at least two rotary units (8) with respect to the tank portion (16), wherein the at least two seal means (30) are arranged outside the tank portion (16).

A screw pump having a main shaft housing (2) in which a drive main shaft (3) and at least one driven main shaft (4) engaged therewith are accommodated in main shaft boreholes, and having an outer housing (5) surrounding the main shaft housing (2), on which an axial inlet connection (6) and a radial outlet connection (9) are arranged, the main shaft housing (2) having an axial fluid outlet for fluid conveyed through the main shaft housing (2) via the drive main shaft and the driven main shaft, and having a drive motor (11) comprising a drive shaft (12) which extends through a borehole (23) in a housing wall (15) axially closing off the interior of the outer housing (5) and is coupled to the drive main shaft (3), wherein a portion of the fluid flowing out of the fluid outlet of the main shaft housing (2) flows along the drive shaft (12) through the unsealed borehole (23) into the drive motor (11), is cooled there and flows back into the outer housing (5).

A method for cooling an assembly (1) for compressing a gas including a housing (2) having a plurality of elements for compressing the gas, the method comprising the steps of: allowing a cooling air flow (21) to flow from an ambient environment into a first section (3) of the housing (2); moving the cooling air flow (21) through a plurality of coolers (14, 16, 18) disposed in a central section (5) of the housing (2), such that the cooling air flow (21) moves from the first section (3) to a second section (4) of the housing (2); and allowing the cooling air flow (21) to flow out of the second section (4) of the housing (2) into the ambient environment.