253results about "Rotary/oscillating piston combinations" patented technology

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 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.

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).

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.

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 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.

To provide a liquid transfer device, specifically a gerotor pump, with a larger theoretical transfer volume but with the same or reduced required footprint. The present invention relates to a gerotor pump, a device for transferring liquids. The device includes a housing having a flange enclosing a volume, an outer rotor mounted for rotation about a longitudinal axis and an inner rotor of a displacement mechanism, and an electric drive rotor. The electric drive rotor is integrally formed with the outer rotor. The flange is also integrally formed with an eccentric for receiving the inner rotor and a conical bearing member extending in the direction of the longitudinal axis for receiving the outer rotor. The present invention relates to the use of the device for transferring liquids in a vehicle, for lubricating and cooling gears using oil or liquid, or for cooling a battery or an electric engine.

The utility model discloses a novel floating type flow water pump, and relates to the technical field of hydraulic pumps. The device comprises a propeller and a propeller output shaft connected with the propeller, and further comprises a bearing arranged on the propeller output shaft, an equipment cavity connected with the bearing, a connecting frame arranged at the end, away from the propeller, of the equipment cavity, and a hollow buoy connected with the connecting frame. The propeller protection cover surrounds the propeller and is connected with the hollow buoy; the hollow buoy is arranged at the upper end of the propeller protection cover; and a water pump and a kinetic energy transmission mechanism capable of transmitting kinetic energy on an output shaft of the propeller to the water pump are arranged in the equipment cavity. Due to the design of the hollow buoy and the propeller protection cover, complex parts such as a middle partition plate, a hollow retention rope and an additional slag blocking net in the prior art are omitted, the number of parts is greatly reduced, the overall structure is simplified, and the manufacturing cost and the maintenance difficulty are reduced.

To provide an electronic oil pump with a pump casing.SOLUTION: The electronic oil pump includes a fixed shaft 4 provided in a pump casing 1, an internal gear 3 eccentric with the fixed shaft and turnably connected thereto, an external gear 2 coaxially connected to the fixed shaft, turnably connected into a pump casing, and located on the outer periphery of the internal gear for engaging with the internal gear, a motor rotor 8 connected to the outer periphery of the external gear in a fixed manner, and a motor stator 93 located on the outer periphery of the rotor and connected to the pump casing in a fixed manner. In a plane passing through the axial center of the fixed shaft, projection regions of the motor stator, the motor rotor, the external gear, the internal gear, and the fixed shaft overlap with one another at least in part.SELECTED DRAWING: Figure 2

A drive unit (100) for a motor vehicle (105) comprises a machine housing section (300) with an electric machine (115) and a transmission housing section (305) with a transmission (130), as well as a hydraulic system (135) for cooling and / or lubricating thermal and / or mechanical consumers in the machine housing section (300) and in the transmission housing section (305). The hydraulic system (135) comprises a pump system (200, 600) with a first pump (601). The machine housing section (300) has a first suction point (310) which is hydraulically connected to the first pump (601) via a first suction line (225), and the transmission housing section (305) has a second suction point (400) which is hydraulically connected to the first pump (601) via a second suction line (230). Here, the first pump (601) is designed as a gear pump, which includes more than two externally toothed pump gears (611, 612, 613).

Fluid pump (10) comprising: a housing (14) which has a pump chamber (16) and an electronics chamber (18); a fluid-pumping device (24) located in the pump chamber (16) of the housing (14); a main suction port (38) emerging into a fluid inlet (40) of the fluid-pumping device (24), and a main pressure port (42) in flow connection with a fluid outlet (44) of the fluid-pumping device (24); and an electric motor (26) which is located in the electronics chamber (18) of the housing (14) and has a stator (28) and a rotor (30) for driving the fluid-pumping device (24). A flow path extends from the main suction port (38), past the fluid-pumping device (24), to the electronics chamber (18). The rotor (30) of the electric motor (18) contains a stationary fluid-conducting element (51).

The invention relates to the technical field of oil pump assemblies, and discloses a wear-resistant structure for an electronic oil pump and the electronic oil pump, the wear-resistant structure comprises a pump head module and a motor module, the pump head module comprises a pump cover, the pump cover is provided with a first oil guide structure, the first oil guide structure is used for introducing high-pressure oil and acting the high-pressure oil on the upper end face of an inner rotor, and the motor module comprises a machine shell. The machine shell is provided with a second oil guide structure, the second oil guide structure is used for introducing high-pressure oil and acting on the lower end face of the inner rotor, and axial load balance is achieved by arranging the oil guide structures on the upper end face and the lower end face of the inner rotor correspondingly; meanwhile, the pump cover is further provided with a first sliding bearing, the machine shell is further provided with a sliding bearing set distributed in the axial direction of the motor shaft, the first sliding bearing and the sliding bearing set form a lever structure with the sliding bearing, farthest from a load point, in the sliding bearing set as a fulcrum, and lateral loads are scientifically dispersed to the multiple bearings by means of the lever principle. The bearing pressure of a single bearing is greatly reduced, and the problem of eccentric wear of the shaft and the bearing chamber is effectively solved.

The utility model provides an on-line quick cleaning magnetic drive gear pump, which comprises a pump cover, a pump body, an inner magnetic drive, a shielding case, a gear cavity, an inlet flow channel and an outlet flow channel arranged on the pump body, an inlet and an outlet arranged on the side wall of the pump body, and a pressure regulating valve assembly comprising a regulating rod, a spring and a sealing valve, an installation screw hole is formed in the pump cover, the external thread section is connected to the installation screw hole, the adjusting rod is movably arranged in the inflow channel, the shielding case is provided with an inner cavity, an inflow channel cleaning hole is formed between the inflow channel and the inner cavity in a communicating mode, an outflow channel cleaning hole is formed between the outflow channel and the inner cavity in a communicating mode, and the spring abuts against the position between the bottom end of the adjusting rod and the top end of the sealing valve. The sealing valve is movably arranged in the inflow channel and blocks the input end of the inflow channel cleaning hole under the elastic force effect of the spring, the interior of the shielding cover can be cleaned, different media can be extracted, and various use requirements are met.

The utility model discloses an adjustable displacement gear oil pump relates to gear oil pump technical field, including gear oil pump body, the upper outer wall of gear oil pump body is equipped with motor, the lower outer wall of gear oil pump body is equipped with the adjusting box, gear oil pump body includes pump shell, pump cover, oil inlet pipe, base, oil outlet pipe, mounting bracket, flow tank, fixed gear and movable gear, and oil inlet pipe and oil outlet pipe fixed communication in the outer wall of pump shell both sides respectively, and flow tank sets up in the inside of pump shell, and fixed gear rotationally connected in the inner wall of flow tank, the utility model discloses a eccentric wheel occurs deflection through the rotation adjusting lever control, thereby pulls the traction plate and moves down, and the movable gear is controlled with the traction plate synchronous and occurs the deviation, thereby changes the effective volume between the teeth when gear engagement, realizes the displacement regulation, thereby make the utility model discloses can conveniently according to the application scene dynamic regulation displacement, adapts to the demand of variable working condition, and the energy -conserving effect is remarkable, reduces the overflow loss.

A permanent magnet embedded motor includes: a stator, including a stator core and a coil for excitation, the stator core being formed in an annular shape by laminating a plurality of steel plates obtained by punching a rolled steel plate material; a rotor, arranged inside the stator and including a permanent magnet; and a housing, made of metal and including a fitting recess of a cylindrical shape centered on a predetermined axis for fitting the stator therein. The stator is shrink-fitted into the housing, with a rolling direction of the steel plate being oriented in an expansion direction in which an inner diameter of the fitting recess undergoes a large amount of change during heating of the housing.

The present disclosure relates to a positive displacement machine device (1) comprising a constant displacement machine (2) with a fixed displacement volume and a variable displacement machine (3) with an adjustable displacement volume, wherein in pump operation of the positive displacement machine device (1) a fluid (4) can be conveyed from an inlet (5) of the positive displacement machine device (1) to an outlet (6) of the positive displacement machine device (1) by means of the constant displacement machine (2) and / or the variable displacement machine (3), wherein in motor operation of the positive displacement machine device the constant displacement machine and / or the variable displacement machine can be driven by fluid flowing from the inlet to the outlet. Noise emissions of the displacement machine device (1) are reduced and / or the displacement machine device (1) can be operated at high speed by fluidically connecting the inlet (5) to a first port (21) of the constant displacement machine (2) and to a first port (31) of the variable displacement machine (3), and wherein the outlet (6) is fluidically connected to a second port (22) of the constant displacement machine (2) and to a second port (32) of the variable displacement machine (3).

The invention provides an integrated double-pump permanent magnet synchronous motor power distribution method and a permanent magnet synchronous motor thereof, and relates to the technical field of new energy automobiles, in the process of executing lifting work, real-time working parameters and real-time lifting acceleration of gear pumps are collected, and a real-time predicted value of weight mass is determined by combining a mapping relation; the real-time value of the weight mass is determined by considering the historical value of the weight mass, then the real-time target value and the real-time power distribution proportion of the working parameters of the gear pump and the vane pump are determined by combining the real-time value of the vehicle speed, and finally the real-time target value and the real-time power distribution proportion of the working parameters are analyzed based on the PID control algorithm, and the rotating speed of the motor is adjusted in real time. The technical effect of considering the load requirements of the steering oil pump and the lifting oil pump is achieved, and when the weight mass is determined, the weight mass real-time prediction value and historical value are comprehensively considered, so that the accuracy of weight mass calculation is guaranteed.

The present invention provides an electric pump comprising: a housing; a gear portion disposed within the housing; a stator configured to correspond to the gear portion; and a support member disposed between the gear portion and the housing, wherein the gear portion includes a first gear, a second gear configured to correspond to the first gear, and a magnet disposed within the second gear, and the support member includes a first region supporting the first gear and a second region protruding from the first region and inserted into the first gear.

The utility model relates to an improved homogeneous emulsification rotor pump, which belongs to the technical field of rotor pumps, and comprises a shell, a front end cover, a rear end cover, two rotating shafts and two gears, the front shell wall of the shell is provided with a front opening, the rear shell wall of the shell is provided with a rear opening, and a liquid inlet channel and a liquid outlet channel which penetrate through the top shell wall and the inner shell wall are respectively arranged in the two opposite shell walls of the shell; the front end cover is detachably connected to the front opening and is provided with two front shaft holes; the rear end cover is detachably connected to the rear opening and is provided with two rear shaft holes; the two rotating shafts are located in the shell, and the two ends of the rotating shafts rotationally extend out of the corresponding front shaft holes and rear shaft holes; the two gears correspond to the position between the liquid inlet channel and the liquid outlet channel, are located in the shell and are fixedly arranged on the two rotating shafts in a sleeving mode respectively, and the two gears are connected in a meshed mode. By means of the liquid inlet channel and the liquid outlet channel which penetrate through the top shell wall and the inner shell wall, the liquid inlet direction and the liquid outlet direction of the rotor pump can be changed, the size of the rotor pump is reduced, and the rotor pump can be conveniently arranged in a narrow working area.

The brushless external fuel pump comprises a pump head assembly, a motor assembly, a connecting disc assembly and a control assembly, the pump head assembly is arranged at the upper end of the motor assembly, the control assembly is arranged at the lower end of the motor assembly, and the connecting disc assembly is arranged between the pump head assembly and the motor assembly. The motor assembly comprises a motor shell, a motor stator assembly, an oil separation sleeve assembly and a motor rotor assembly which are sequentially arranged from outside to inside. The pump head assembly comprises a pump head installed on the motor shell, an oil inlet channel with one end communicating with the outside of the left side of the pump head and an oil outlet channel with one end communicating with the outside of the right side of the pump head are arranged in the pump head, and a cycloid gear assembly is arranged at the lower end of the pump head. The other end of the fuel inlet channel is communicated with the other end of the fuel outlet channel through the cycloid gear assembly, the requirements for high fuel pressure and large flow of a large heavy truck can be met, and the service life of the fuel pump is guaranteed.

The utility model discloses a double-medium double pump structure with an independent loop, and relates to the technical field of oil pumps. Comprising a front cover, the outer wall of the front cover is fixedly connected with a front pump body, the end, away from the front cover, of the front pump body is fixedly connected with a front transition plate, the inner wall of the front cover is rotationally connected with a front shaft, the outer wall of the front transition plate is fixedly connected with a rear transition plate, and the inner wall of the rear transition plate is clamped with an oil seal structure; the side, away from the rear transition plate, of the rear pump body is fixedly connected with a rear cover, a first oil inlet is formed in the outer wall of the bottom of the front pump body, and a second oil inlet is formed in the outer wall of the bottom of the rear pump body. Double-medium conveying can be completed at the same time, loops do not interfere with one another, and therefore the working efficiency is improved.

The oil pump comprises an oil pump shell and a rotor assembly, an installation cavity is formed in the oil pump shell, a first oil groove and a second oil groove are formed in the cavity wall of the installation cavity, the first oil groove and the second oil groove are arranged in a spaced mode, the first oil groove is communicated with an oil inlet of the oil pump, and the second oil groove is communicated with an oil outlet of the oil pump. The second oil groove is communicated with an oil inlet of an oil cooler, the rotor assembly is installed in the installation cavity, and the rotor assembly is used for transmitting oil in the first oil groove to the second oil groove; the cavity wall of the installation cavity is further provided with a communication groove, one end of the communication groove is communicated with the first oil groove, and the other end of the communication groove is communicated with the second oil groove. According to the oil pump and the vehicle, the oil suction force of the oil pump can be improved when the rotor assembly conducts differential pressure oil suction.

This utility model discloses an electronic oil pump with an installation structure, including a pump housing, a motor rotor inside the pump housing, an oil chamber at one end of the pump housing, an outer rotor inside the oil chamber, and an inner rotor inside the outer rotor. The motor rotor and the inner rotor are keyed together. A mounting cover is fixedly connected to one end of the pump housing, and multiple ends of the mounting cover are fixedly connected to first connecting ears. Each first connecting ear has a first mounting hole. Multiple reinforcing ribs are fixedly connected to one side of the outer wall of the mounting cover. One side of the mounting cover has a first oil inlet and a first oil outlet. An isolation cover plate is fixedly connected to one end of the pump housing, and a circuit board housing is fixedly connected to one end of the isolation cover plate. This utility model facilitates the external fixed installation of the electronic oil pump by inserting bolts into the first mounting holes. The operation is simple, convenient, and quick, and the installation effect of the electronic oil pump is improved.

A method for pumping a liquid-gas mixture into a subsurface well includes introducing gas into a liquid at a first pressure to generate a mixture. The mixture is pumped through a first positive displacement pump to a second pressure greater than the first pressure. The mixture at the second pressure is pumped through at least a second positive displacement pump to a third pressure greater than the second pressure. The mixture is moved into the subsurface well at at least the third pressure.

The invention relates to a pump device 100 and a rotor core 711 for the pump device. The pump device 100 comprises a first rotor element 1 rotatably mounted about a first axis of rotation d1 extending in an axial direction Z, a second rotor element 2 rotatably mounted about a second axis of rotation d2 offset from the first axis of rotation d1, and a pump housing 3. The rotor elements 1 and 2 are arranged in a pump chamber 4 bounded by the pump housing 3 and mesh together to convey fluid from an inlet of the pump device to an outlet of the pump device 100. One of the rotor elements 1 and 2 is designed as an outer rotor. The other of the rotor elements 1 and 2 is designed as an inner rotor enclosed by the outer rotor perpendicular to the axial direction Z.The pump housing 3 comprises a pot-shaped first housing part 31, which has a housing base 311 and a circumferential housing wall 312, and has a second housing part 32 arranged on the housing wall 312, wherein the first rotor element 1 is mounted on a retaining part 5 which is arranged in the pump chamber 4 on the housing base 311, wherein the second rotor element 2 is mounted on a side of the pump chamber 4 opposite the retaining part 5 in the axial direction Z.