9079results about "Rotary piston pumps" patented technology

To provide a technique for suppressing influences caused by the presence of a space communicating in a radial direction in a protruding portion, which protrudes from a stator core, in a stator coil.SOLUTION: A compressor 100 comprises a compression mechanism part 120 and a motor 200 which are stored in a sealed container 110. A stator 300 of the motor 200 includes a stator coil 340 wound around a plurality of teeth of a stator core 310. The stator coil 340 includes a first protruding portion 340A and a second protruding portion 340B protruding from the stator core 310 to a first side and a second side in an axial direction. At least outside of the first protruding portion 340A, a first enclosure wall 350 is provided which extends without a gap in the axial direction and a circumferential direction.SELECTED DRAWING: Figure 1

Disclosed is a screw compressor (100), comprising a screw compressor housing (101), a discharge cavity (113), at least one silencing channel, and at least one adjustment piston, wherein the discharge cavity (113) is defined by at least one part of the screw compressor housing (101); the at least one part of the screw compressor housing (101) defining the discharge cavity (113) forms a wall of the discharge cavity (113); at least one hole is provided in the wall of the discharge cavity (113); the at least one adjustment piston can be inserted into the at least one hole and move therein; the at least one silencing channel is formed by the at least one hole and the at least one adjustment piston, and the at least one silencing channel is in fluid communication with the discharge cavity (113); and the position of the at least one adjustment piston in the at least one hole determines the silencing length of the at least one silencing channel.

An example gear pump includes a pump housing having a pump housing channel and an arcuate groove disposed in an interior surface of the pump housing; a pump ring gear disposed within the pump housing and rotatable relative to the pump housing; a pump pinion disposed within the pump ring gear, such that teeth of the pump pinion engage with internal teeth of the pump ring gear; and a pump port block having a first port and a second port, wherein as the pump pinion rotates within the pump ring gear, fluid is drawn through the first port and provided to the second port for discharge, wherein a portion of fluid being provided to the second port is provided to the pump housing channel, wherein fluid from the pump housing channel is provided to the arcuate groove to apply a radially-inward force on the pump ring gear.

The shutdown of a compressor (10) installed in a refrigerant circuit (2) in air conditioning or refrigeration system is controlled so as to prevent unpowered reverse rotation of the compressor. Prior to terminating electric power to the compressor drive motor (24), the pressure within the system is relieved and substantially equalized across the compressor, thereby eliminating the possibility of unpowered reverse rotation of the compressor at shutdown. Pressure relief and equalization may be achieved by reducing the operating speed of the compressor to a low forward speed for a period of time prior to deenergizing the compressor drive motor. Pressure equalization may also be achieved by driving the compressor in reverse rotation prior to deenergizing the drive motor.

A compressor assembly may include a shell, a discharge fitting, a muffler, a compression mechanism, and a motor. The shell may have an opening therethrough with the discharge fitting generally extending therefrom. The muffler may be in communication with the discharge fitting and may be external to the shell. The muffler may have an inlet proximate the discharge fitting, an outlet distal from the discharge fitting, and a body portion extending therebetween. The muffler may include a valve assembly proximate the outlet. The compression mechanism may be contained within the shell and include a suction inlet and a discharge passageway. The discharge passageway may be connected to the opening in the shell for direct discharge of refrigerant from the compression mechanism to the discharge fitting. The motor may be contained within the shell and drivingly coupled to the compression mechanism.

A vacuum pump for generating a negative pressure includes a pump housing having a pump chamber with a rotor and a motor for driving the rotor with a drive shaft rotatable about a longitudinal axis, a first and a second inlet line. The second inlet line leads through the pump housing into the pump chamber. A first outlet line leads from the pump chamber through the pump housing. The pump has a first outlet valve and a second outlet line connected to the pump housing. A connecting part is attached to a connecting surface running circumferentially to the longitudinal axis, and the outlet valve with the second outlet line is formed in the connecting part. The connecting part further has the first inlet line, with a first connecting opening formed in the connecting part housing, via which the first inlet line is connected to the second inlet line.

The invention discloses a high-silt-content working condition screw pump control system and method, and belongs to the technical field of soil layer drilling, and the system comprises a multi-mode sensing module, an intelligent decision and control module, a self-adaptive adjustment execution module and a self-cleaning and anti-blocking module. According to the high-mud-content working condition screw pump control system and method, the operation state and medium characteristic data of the screw pump are accurately collected through the multi-mode sensing module, and early prediction and accurate diagnosis of faults are achieved in combination with an advanced data processing algorithm and a deep learning model in the intelligent decision-making and control module; meanwhile, a self-adaptive adjustment execution module and a self-cleaning and anti-blocking module are utilized to dynamically optimize the rotating speed and the gap of the motor and intelligently clean and prevent blocking, so that full-process closed-loop control is formed; finally, multiple beneficial effects of improving the monitoring accuracy, enhancing the anti-interference capability of the system, reducing the maintenance cost, reducing the non-planned downtime, and improving the operation efficiency and stability are achieved.

The utility model provides a Roots blower casing assembly with a countercurrent cooling flow adjustable device, which is provided with an outer casing, an exhaust pipeline is fixedly arranged at the lower end of the outer casing, an air inlet is arranged at the top end of the outer casing, and an air outlet is arranged at the bottom end of the outer casing. Counter-flow cooling holes are formed in the positions, close to the left side and the right side of the air outlet, of the lower end of the outer shell correspondingly, the two sides of each counter-flow cooling hole communicate with an inner cavity of the shell and the exhaust pipeline correspondingly, and a counter-flow air inflow adjusting block assembly is fixedly arranged in each counter-flow cooling hole and comprises a counter-flow air inflow adjusting block. The countercurrent air inflow adjusting block is located on the inner wall of the countercurrent cooling hole. The Roots blower solves the technical problems that when an existing Roots blower operates for a long time, the temperature in a machine shell of the Roots blower can be obviously increased, and especially the position, close to an air outlet, in the machine shell is prone to gas accumulation, so that the temperature of the area is too high. The Roots blower can be widely applied to Roots blowers.

A vacuum pump, which is connectable to an external system and configured to evacuate material from the external system, includes a main housing defining a motor housing, a pump housing, and a partition wall that separates the motor housing and the pump housing. The pump housing is sealed relative to the motor housing to form a compression chamber that holds a lubrication fluid. The vacuum pump further includes a motor assembly that is positioned within the motor housing and a pump assembly that is positioned within the compression chamber. The pump assembly is driven by the motor assembly and is in fluid communication with the compression chamber. The pump assembly includes a pump chamber, a rotor having vanes that is driven within the pump chamber, and a seal that is in sliding contact with the rotor. The seal is moveable relative to the rotor.

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.

Assemblies, apparatuses, and methods to extract or convey a material from a source of the material may include a vacuum generation and sound attenuation assembly. The vacuum generation and sound attenuation assembly may include a compressor housing having a vacuum source, a cooling system, and a vacuum controller. The vacuum source may include a compressor powered by an electric motor and positioned to cause a vacuum flow between the source of the material, and the vacuum generation and sound attenuation assembly. The vacuum generation and sound attenuation assembly may further include a sound attenuation chamber positioned to receive at least a portion of the vacuum flow from, and attenuate sound generated by, the vacuum source. The compressor housing and sound attenuation chamber of the vacuum generation and sound attenuation assembly may be arranged compactly on a common chassis for ease of transport and deployment.

The invention discloses an energy-saving gear pump with an intelligent flow adjusting function, and relates to the technical field of gear pumps. Comprising a machine base, a front cover and a rear cover are arranged on the left side and the right side of the machine base respectively, a liquid inlet and a liquid outlet are formed in the front side and the rear side of the machine base respectively, a driving gear and a driven gear meshed with each other are installed in the machine base, and floating side plates are arranged on the front cover and the rear cover; a conical disc is rotatably mounted on the inner side of the liquid inlet; two groups of coils are mounted on the outer side of the liquid outlet; two groups of electrodes are arranged in the liquid outlet; a sieve plate is mounted on one sides of the two groups of electrodes; liquid cuts magnetic induction lines in the magnetic field range of the two sets of coils, induced electromotive force is generated on the two sets of electrodes, the control system processes and calculates the induced electromotive force, then flow data are obtained, and intelligent flow adjustment of the gear pump is achieved.

The invention discloses a high-pressure type oil-free scroll compressor which comprises a compressor body composed of a first static scroll plate, a first dynamic scroll plate, a second dynamic scroll plate and a second static scroll plate, and the back face of the first dynamic scroll plate and the back face of the second dynamic scroll plate are arranged in an attached mode. The front face of the first orbiting scroll and the front face of the second orbiting scroll are meshed with the back face of the first static scroll and the back face of the second static scroll respectively, and the orbiting scrolls and the static scrolls are matched with each other to form a compression cavity. The scroll compressor further comprises four eccentric pins, an eccentric pin eccentric section is integrally formed in the middle of the outer surface of each eccentric pin, and the eccentric pin eccentric sections of the four eccentric pins are rotationally connected to the four corners of the first movable scroll plate and the four corners of the second movable scroll plate through movable plate bearings respectively. The oil-free scroll air compressor solves the problem that the exhaust pressure of the oil-free scroll air compressor is difficult to reach 1.2 Mpa or above.

The utility model belongs to the technical field of compressors, and discloses a rotary compressor which comprises a shell, an air cylinder and a motor, the shell is provided with an inner cavity, the air cylinder and the motor are both arranged in the inner cavity, the air cylinder is provided with a compression cavity, a piston is arranged in the compression cavity, blades penetrate through the air cylinder, stretch into the compression cavity and abut against the piston, and the motor comprises a stator, a rotor and a crankshaft. The crankshaft comprises a shaft part and an eccentric part, the shaft part is fixed in the rotor, and the eccentric part is inserted into the piston; the value range of the outer diameter of the stator is 66-108 mm, the value range of the ratio of the height of the blades to the outer diameter of the stator is 0.12-0.304, the value range of the ratio of the eccentricity of the crankshaft to the outer diameter of the stator is 0.0105-0.0738, and the value range of the volume of the stator is 81-522 cm < 3 >. On the premise that the refrigeration effect of the compressor is guaranteed, the size of the compressor is further reduced, the total weight is reduced, and the cold-to-weight ratio of the compressor is effectively increased.

The invention relates to a gear pump cover and a four-quadrant working internal gear pump, and relates to the technical field of hydraulic pumps. The gear pump cover comprises a pump cover shell, a medium exchange port and a one-way valve, and a medium passage is formed in the four-quadrant working internal gear pump cover; the medium exchange port is located in the top of the pump cover shell. When the four-quadrant working internal gear pump cover is connected with the pump body, the medium exchange port is used for exchanging media with the outside, and the one-way valve is used for conveying the media leaked in the medium channel to the low-pressure medium cavity. In the working process of the internal gear pump, under the condition that a pump cover is connected with a pump body, an axial compensation structure and a radial compensation structure between the pump body and the pump cover are designed, so that in the working process of the pump cover gear pump, when high-pressure oil passes through an oil pumping assembly, the oil can be effectively compensated when an axial gap and a radial gap are generated; clearance compensation is achieved through a mechanical structure, so that the oil drainage amount generated by clearances in the working process is reduced, the volume efficiency is improved, and the low-speed performance is improved.

The invention relates to a self-adaptive oil supply assembly, a scroll compressor and an air conditioner. The self-adaptive oil supply assembly comprises a shell, an upper sliding block and a lower sliding block, the shell is provided with an inner cavity, a top opening and a bottom opening, the top opening and the bottom opening communicate with the inner cavity, and the top opening, the inner cavity and the bottom opening jointly form an oil supply channel; a plurality of upper sliding blocks are arranged, each upper sliding block is elastically connected with the inner wall of the inner cavity in the radial direction, and when each upper sliding block is kept in a static state, the upper sliding blocks are spliced to form an upper notch with the diameter equal to that of the top opening; the lower sliding blocks are arranged below the upper sliding blocks, each lower sliding block is elastically connected with the inner wall of the inner cavity in the radial direction, and when the lower sliding blocks are kept in the static state, the lower sliding blocks are spliced together to form a lower notch with the diameter equal to that of the bottom opening.

An apparatus and methods for a rotor pack are provided for a positive displacement supercharger that produces greater engine power output without loss of best seal between the rotors or between the rotors and an interior surface of an enclosing case. The rotors include relief zones and cupped portions at an intake airflow side of each lobe comprising the rotors. The relief zones allow additional airflow to enter the rotor pack while the cupped portions scoop additional airflow into the rotor pack during operation of the supercharger. Tapered radius portions of an enclosing case allow additional airflow to be dragged into the rotor pack. Pressure relief portions on a rotor bearing plate and angled portions on each lobe extend compression events during operation of the rotor pack. The angled portions reduce a margin of the lobes to sharpened edges without affecting the diameter of the margin.

A scroll compressor includes a rotary shaft, an eccentric shaft that is eccentric with respect to an axis of the rotary shaft, a bushing that receives the eccentric shaft, and a shaft balancer that rotates integrally with the rotary shaft. The bushing includes a bushing balancer. The shaft balancer includes a first section and a second section. When viewed in the axial direction of the rotary shaft, the first section is located on the same side of a second straight line as the center of gravity of the bushing balancer. The second straight line contains the center of gravity of the shaft balancer and the axis of the rotary shaft. The second section is located on an opposite side of the second straight line from the center of gravity of the bushing balancer. The stiffness of the first section is lower than the stiffness of the second section.

The invention discloses an integrated servo motor pump based on an internal gear pump, and relates to the field of integrated servo motor pumps, the integrated servo motor pump comprises a shell, an end cover, a servo motor, a bidirectional internal gear pump and a rotating speed sensor, the servo motor and the bidirectional internal gear pump are both arranged in the shell, one end of a motor shaft of the servo motor is connected with a pump shaft of the bidirectional internal gear pump through a spline, so that the motor shaft can drive the pump shaft to rotate together; the end cover is connected to one end of the shell, the rotating speed sensor is connected to the end cover, and a sensor shaft of the rotating speed sensor penetrates through the end cover to be in interference connection with the other end of the motor shaft. And the targets of low noise, high power density and large-range dynamic regulation of the rotating speed are achieved.

A progressive cavity pump rotor can include a scroll portion, which can be configured to interface with a stator, and a head portion, which can be configured to be coupled to a coupling rod with a non-collinear joint, where the scroll portion can be releasably coupled to the head portion with a collinear joint.

An electric compressor includes a housing and a compression device. The housing defines an intake volume and a discharge volume. The compression device is a rotary-type compression device configured to compress refrigerant. The compression device includes a piston device including a cylinder and a rolling piston. The cylinder is eccentrically coupled to a drive shaft. The rolling piston has an outer surface in contact with an inner surface of a compression chamber. The rolling piston rotates about the cylinder as the drive shaft and the piston device are rotated by a motor. A vane moveably coupled to the housing and having an end adjacent the compression chamber is biased such that the end of the vane is in contact with the rolling piston as the piston device is rotated by the drive shaft.

A pump assembly includes an axial gap motor including a first stator, a motor rotor and a motor shaft, and a first pump including a first pump rotor configured to be rotated by the motor rotor. The first stator includes a first yoke having an annular shape and a plurality of first teeth disposed on a first surface of the first yoke. The first pump is disposed in a first internal space surrounded by the plurality of first teeth.

A mobile pump system for pumping water for extinguishing with an auxiliary agent, and a method therefor. The mobile pump system includes a frame for housing the pump system, a booster pump arranged in the frame, a metering pump arranged in the frame for the purpose of adding an auxiliary agent to a water flow, and a drive configured to drive the booster pump and the metering pump. The metering pump is provided with a displaceable metering pump frame and coupling means for connecting the metering pump to a container of the auxiliary agent.

The invention discloses a variable speed brushless motor methanol pump, comprising a methanol pump and a brushless motor, wherein the brushless motor is integrated in the methanol pump and drives the methanol pump to work, the control board of the brushless motor is integrated in the methanol pump to control the brushless motor to work, and the output end of the brushless motor drives the rotating parts of the methanol pump to work; an oil outlet connector, an oil inlet connector and a connector are provided on the methanol pump, the connector is electrically connected to the control board of the brushless motor, the control board is connected to the engine crankshaft signal, and the engine crankshaft signal is converted to control the rotation of the brushless motor; or the control board is connected to the ECU using a CAN communication method to send a signal, and the ECU uses a CAN communication method to send a signal to control the rotation of the brushless motor. The invention can make the oil delivery pump change the output flow and pressure, and maintain a relatively high pressure of 12 bar to weaken the pipeline-level fuel filter resistance, which can meet the requirements of the injection pump with large flow.

The present invention provides an air-injection and heat-increasing compressor and an air conditioner. The air-injection and heat-increasing compressor includes: a cylinder, a partition or flange, and a valve body. The partition or flange is connected to one axial end face of the cylinder, and an air-injection and heat-increasing channel is defined within the partition or flange. An injection channel is defined in a recessed manner on the axial end face of the cylinder connected to the partition or flange. The radial inner side of the injection channel is connected to the internal cavity of the cylinder. A valve slot is defined on the surface of the injection channel away from the partition or flange. At least part of the valve body is disposed in the valve slot. A pressure introduction slot is also provided on the side of the valve slot away from the injection channel. One end of the pressure introduction slot is connected to the valve slot, and the other end can be connected to the internal cavity of the cylinder. The valve body can move within the valve slot and the injection channel to open or close the injection channel. According to the present invention, the problem of poor enthalpy increase effect caused by unreasonable enthalpy increase time can be solved; and the air supply volume can be effectively increased to meet air supply requirements.

An electric scroll compressor configured to compress a refrigerant for use with a vapor injection system, is provided. The compressor includes refrigerant inlet and outlet ports and a vapor injection port. The housing includes a vapor injection cavity and at least one vapor injection channel which are integral therewith. A compression device includes a fixed scroll and an orbiting scroll. The orbiting scroll and the fixed scroll form compression chambers for receiving the refrigerant from the intake volume and compressing the refrigerant as the drive shaft is rotated about the center axis. The fixed scroll includes at least one vapor outlet aperture in communication with the at least one vapor injection channel for allowing vapor to enter a compression chamber formed between the fixed scroll and the orbiting scroll.

The utility model discloses a dry oil-free screw compressor structure assembly, comprising a screw compression chamber, a synchronous end cover, a tail cover and a screw balance cover which are detachably connected in sequence from right to left in the axial direction; a screw balance seat kit is arranged between the tail cover and the screw balance cover; a yin-yang screw chamber and a sandwich cooling water jacket chamber are opened on one side of the screw compression chamber close to the synchronous end cover, the sandwich cooling water jacket chamber is arranged around the yin-yang screw chamber, a cooling water inlet is arranged on one side of the yin-yang screw chamber, and a cooling water outlet is arranged on the other side; by arranging the sandwich cooling water jacket chamber with nearly full coverage and flow channel circulation characteristics for the screw compression chamber, the temperature in the yin-yang screw chamber is reduced, thereby reducing the exhaust temperature.

The invention provides a compressor and a heat exchange device. The compressor includes: a first bracket; the static vortex plate, the first bracket and the static vortex plate define a containing cavity; an orbiting scroll; the movable vortex plate and the supporting assembly are both arranged in the containing cavity, and at least one part of the supporting assembly can provide acting force for the movable vortex plate to move towards the static vortex plate under the action of fluid in the containing cavity. The problem that in the prior art, a compressor is poor in use performance is solved.

The utility model discloses a volume ratio slide valve adjusting device, a single-machine two-stage screw compressor and an air conditioning unit. The volume ratio slide valve adjusting device comprises an oil cylinder, an oil piston, a slide valve rod, a slide valve, a loading electromagnetic valve and an unloading electromagnetic valve, wherein the slide valve rod and the slide valve are sequentially connected with one side of the oil piston, and the loading electromagnetic valve and the unloading electromagnetic valve are communicated with the oil cylinder. A spring is arranged between the other side face of the oil piston and the oil cylinder, and the unloading electromagnetic valve enables the oil cylinder to be communicated with the low-pressure stage of the single-machine two-stage screw compressor. The volume ratio slide valve adjusting device is applied to a single-machine two-stage screw compressor, and the size of the high-pressure stage Vi of the compressor can be adjusted in time according to needs, that is, the volume ratio slide valve adjusting device can be adjusted to the position of the minimum Vi under the working condition of a small pressure ratio. And after the compressor is shut down, the compressor can be automatically adjusted to be in a small Vi state, so that unloading starting is facilitated. And meanwhile, the high-pressure stage Vi can be stably and reliably increased, so that the matching of the pressure ratio of the compressor is effectively realized, and the efficiency of the compressor is improved.

The utility model discloses a scroll compressor with an axially flexible pressure balancing mechanism, comprising: a compression part, the compression part comprising a static scroll and a movable scroll, the static scroll and the movable scroll form a compression chamber; a main bearing seat; a floating sealing plate; wherein a static scroll back pressure chamber is formed between the floating sealing plate and the static scroll, a movable scroll back pressure chamber is formed between the main bearing seat and the movable scroll, and the static scroll is provided with a back pressure hole for connecting the compression chamber with the static scroll back pressure chamber, and the movable scroll is provided with a back pressure channel for connecting the compression chamber with the movable scroll back pressure chamber. The utility model arranges a static scroll back pressure chamber above the compression part, arranges a movable scroll back pressure chamber below the compression part, and arranges a specific channel for connecting the compression chamber, the static scroll back pressure chamber, and the movable scroll back pressure chamber, so that the high-pressure gas in the compression chamber enters the static scroll back pressure chamber and the movable scroll back pressure chamber, reduces the friction between the movable scroll and the thrust surface, and improves the reliability of the compressor.