13197results 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

A screw compressor and a variable capacity bypass valve therefor are provided. The variable capacity bypass valve includes a bore formed in a rotor bore discharge face of the compressor housing upstream of a compression chamber outlet end of the compression chamber, a slide valve member inserted into the bore to fill a cavity, the valve member having a sealing surface configured to interact with a thread of a compressor screw during operation of the screw compressor, an actuator structure coupled to the valve member and oriented to move the valve member radially along the bore to open a fluid pathway communicatively coupling the compressor chamber to a bypass chamber configured to return compressed fluid to a fluid inlet of the compression chamber.

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.

The disclosure relates to a screw pump comprising: a casing with an inlet, an outlet and a flow chamber between the inlet and the outlet; and at least two screws housed in the flow chamber to force a fluid flow through the flow chamber from the inlet to the outlet; wherein at least one of the screws comprises a lubricated polymer material.

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 compressor shaft system oil return structure comprises a crankshaft, an upper support, a lower support and a bottom oil pool, the crankshaft is provided with a crankshaft oil return channel, the crankshaft oil return channel comprises an oil return channel, an oil return outlet and an oil return inlet, the oil return outlet is communicated with the top of the oil return channel, the oil return inlet is communicated with the bottom of the oil return channel, and the oil return inlet is communicated with the bottom of the oil return channel. The upper end of the crankshaft is inserted into the upper support, the oil return inlet is formed in the upper support, the oil return outlet is formed in the lower support, the bottom oil pool is located below the lower support, and a gap is formed between the inner side wall of the bottom oil pool and the outer surface of the lower support. By implementing the structure, the performance of the scroll compressor lubricating system can be improved, the installation and maintenance process is simplified, and the reliability and efficiency of the system are improved.

An electric compressor and a heat exchanger module including the same. The heat exchanger module includes heat exchanger components, a manifold, a bracket mounting the heat exchanger components and the manifold, and an electric compressor. Further, the heat exchanger module may perform cooling through heat exchange by separating an inverter module coupled to a compressor and attaching the separated inverter module to a chiller in which a working fluid at a low temperature flows.

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.

An antirotation valve system for controlling flow through a valve opening defined in a compressor surface. The antirotation valve system includes a reed and a backer each having one mounting opening and one antirotation feature.

The invention provides a cylinder body, an air cylinder, a compressor and an air conditioner. The cylinder body is provided with a working cavity, a sliding sheet groove, a first exhaust notch and a second exhaust notch, the sliding sheet groove, the first exhaust notch and the second exhaust notch are all communicated with the working cavity, the cylinder body comprises an upper side in the axial direction of the cylinder body, and the first exhaust notch is formed in the upper side; the second exhaust notch is formed in the upper side; in the circumferential direction of the cylinder body, the first exhaust notch is formed in the position far away from the sliding piece groove relative to the second exhaust notch. The air cylinder comprises a cylinder body and an upper flange, the upper flange is connected with the upper side of the cylinder body in the axial direction of the cylinder body, and the cylinder body is adopted as the cylinder body. The upper flange comprises a first exhaust hole and a second exhaust hole, the first exhaust hole is communicated with the first exhaust notch, and the second exhaust hole is communicated with the second exhaust notch. The compressor includes a cylinder. The air conditioner comprises a compressor. The exhaust pressure loss is reduced on the premise of reducing the equipment manufacturing cost, and the energy efficiency of the compressor is improved.

The utility model discloses a two-shaft mixing pump. The two-shaft mixing pump is characterized by comprising a pump body and two connecting shafts, a roots pump body cavity and a screw pump body cavity which are mutually independent are arranged in the pump body; the pump body is provided with an air inlet, an air outlet and a connecting channel, the roots pump body cavity is communicated with the outside atmosphere through the air inlet, the screw pump body cavity is communicated with the outside atmosphere through the air outlet, and the roots pump body cavity is communicated with the screw pump body cavity through the connecting channel. Two roots rotor parts which are meshed with each other are arranged in a cavity of the roots pump body, and the two roots rotor parts are respectively arranged on the two connecting shafts; and two screw rotor parts which are meshed with each other are arranged in a cavity of the screw pump body, and the two screw rotor parts are respectively mounted on the two connecting shafts. According to the utility model, the occupied space is reduced, the vacuum degree is improved, and the cost is reduced.

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 utility model discloses an integrated vacuum system which is characterized in that the integrated vacuum system comprises a box body, a first vacuum pump and a second vacuum pump, the first vacuum pump and the second vacuum pump are arranged in the box body, the top of the second vacuum pump is connected with the bottom of the first vacuum pump through a mounting plate, and two sides of the box body are respectively provided with a cross beam. Two sides of the first vacuum pump are respectively connected with the cross beam through supporting legs; a connecting port is formed in the mounting plate, and an air inlet in the top of the second vacuum pump is communicated with an air outlet in the bottom of the first vacuum pump through the connecting port. According to the utility model, the convenience of installation and debugging is improved, and the vacuum effect is also improved.

The oil-gas separation assembly comprises a separation shell, a closure baffle and an exhaust pipe, the separation shell comprises an oil discharge outlet and an air inlet, an included angle is formed between the air inlet and a first air outlet, a second air outlet is formed in the first end of the exhaust pipe, and the separation shell is provided with the oil discharge outlet; the cut-off baffle is sleeved on the exhaust pipe; on the horizontal projection, the second end of the exhaust pipe at least covers the end, close to the second air outlet, of the air inlet, and the end, close to the air inlet, of the closure baffle is located between the second air outlet and the air inlet. The oil-gas separation assembly can simply and efficiently achieve separation of oil and gas, the oil discharge rate of the compressor is reduced, loss of refrigeration oil of the compressor is avoided, and the reliability of the compressor is improved. The oil-gas separation assembly is simple in overall structure, convenient to assemble and low in cost, and the problem that the oil discharge rate of an existing scroll compressor is continuously increased can be solved under the condition that the manufacturing cost is not additionally increased.

A compressor may include first and second scrolls and a capacity modulation assembly. The capacity modulation assembly may include a valve ring and a modulation control valve. The valve ring is movable relative to the first scroll between a first position corresponding to a first capacity mode and a second position corresponding to a second capacity mode. The modulation control valve includes a valve body and a valve member that is movable relative to the valve body to cause corresponding movement of the valve ring. The valve body includes a cavity in which the valve member is movably disposed. The valve body includes passages in fluid communication with the cavity. A first pressure differential between fluid in one of the passages and fluid in another of the passages causes movement of the valve member to cause corresponding movement of the valve ring between the first and second positions.

The utility model discloses a compression unit, a compressor, a heat management system and a vehicle, the compression unit comprises a first scroll plate and a second scroll plate, the first scroll plate comprises a first bottom plate and a plurality of first scroll teeth arranged on the first bottom plate, and the second scroll plate comprises a second bottom plate and a plurality of second scroll teeth arranged on the second bottom plate; a plurality of compression channels are formed by the first scroll teeth, the first bottom plate or the second bottom plate is provided with a plurality of exhaust holes communicated with the compression channels respectively, the second scroll teeth are arranged on the compression channels respectively, and the second scroll teeth and the first scroll teeth move relatively to compress fluid located in the compression channels. According to the compression unit, the multiple compression channels and the multiple exhaust holes which correspond to one another are formed, fluid compression and discharge can be conducted through the multiple compression channels, and the clearance volume of the compressor can be reduced.

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.

An eccentric screw pump with a rotor of a pump drive shaft circling essentially about a fixed axis relative to a stator in a bearing block, which pump drive shaft is rotationally driven by a motor drive shaft of a motor, a power train and a screw conveyor, which revolves in a rotating-oscillating manner in a screw flight of the stator, wherein the power train provides the screw conveyor with its drive torque and the power train adapts the differences of the motion sequences of the screw conveyor and of the pump drive shaft. There is thereby an air gap between the motor drive shaft and the pump drive shaft, wherein the motor drive shaft supports a motor-side coupling half and the pump drive shaft supports a pump-side coupling half, which are connected to one another in a torque-transmitting manner by means of magnetic forces across the air gap, wherein the air gap is penetrated by a seal, which hermetically separates the motor region from the rest of the eccentric screw pump.

The invention discloses a balance weight block and a scroll compressor, and relates to the technical field of scroll compressors, in particular to the balance weight block and the scroll compressor. According to the balance weight block and the scroll compressor, the auxiliary oil supply channel is arranged in the balance weight block; and the auxiliary oil supply channel is formed by a balance weight block annular channel and an upward channel on the balance weight block and a transverse channel, an eccentric channel and an annular channel on the driving shaft component or a combination of several of the components. According to the technical scheme, the problems that in the prior art, in the operation process of the scroll compressor, especially under the condition of low-speed operation, enough stirring force cannot be provided for the lubricating agent, so that the thrust surface between the movable scroll component and the main bearing seat is lubricated insufficiently, and consequently excessive abrasion, even kinematic pair failure and the like are caused are solved.

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 scroll compressor. The scroll compressor comprises a static scroll plate, a dynamic scroll plate, a high-pressure partition plate, a high-pressure cover plate, an exhaust valve and a pressure release valve. Wherein the orbiting scroll is configured to be matched with the static scroll to form a compression cavity with variable volume; the high-pressure partition plate is arranged on the static scroll plate; the high-pressure cover plate is connected with the high-pressure partition plate to form an exhaust cavity; the exhaust valve is configured to be communicated with the compression cavity and the exhaust cavity when the exhaust pressure of the compressor is reached; the pressure release valve is arranged on the high-pressure partition plate and is configured to communicate the compression cavity with the exhaust cavity when the pressure in the compression cavity exceeds the exhaust pressure. According to the scroll compressor disclosed by the invention, the pressure release valve is arranged on the high-pressure partition plate, and high pressure in the exhaust cavity directly acts on the high-pressure partition plate instead of directly acting on the static scroll plate, so that the acting force on the static scroll plate is relatively reduced, the risk that the scroll blades of the static scroll plate are stressed and deformed is reduced, and the service life of the scroll compressor is prolonged. And the service life, the performance and the reliability are ensured.

A scroll compressor includes a compressor shell; a frame (4) installed in the compressor shell; a first scroll (5) located in the compressor shell; and a second scroll (6) located in the compressor shell and being co-rotatable with the first scroll (5), to define a compression chamber (56) between the first scroll (5) and the second scroll (6), the second scroll (6) having a hub (41) that extends downward from a lower surface thereof; a transformer flange (8) supported on the frame and supporting the first scroll (5) and the second scroll (6), the transformer flange (8) being connected to the first scroll (5); an actuating mechanism (7) installed in the compressor shell and connected to the transformer flange (8), for driving the transformer flange (8) to rotate, so that the first scroll (5) and the second scroll (6) are driven to co-rotate; a crankshaft (9) assembly located in the transformer flange (8) and including an oil screw (10), an upper end (101) of the oil screw (10) being fitted with a hub (61) of the second scroll (6), a lower end of the oil screw (10) extending into an oil sump (31); and a plurality of supports (11, 12, 13, 14, 15, 16), such as bearings or bushings or gaskets, located on the same side of the compression chamber (56).