5275results about "Rotary piston pumps" patented technology

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 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 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.

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.

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 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.

Scroll vacuum pump with a pumping system (11, 13) comprising a fixed spiral component (11) and a movable spiral component (13) cooperating with the latter for pumping purposes, and a drive shaft (17) rotating about a rotational axis (15) during operation, having an eccentric section (19) for driving the movable spiral component (13), and a method for operating such a scroll vacuum pump.

The invention discloses a compressor and a refrigerating system. The compressor comprises a machine shell, a motor and a pump body assembly. The shell is provided with an accommodating cavity; the motor is arranged in the containing cavity and comprises a rotor and a stator arranged on the periphery of the rotor in a sleeving mode. The pump body assembly is arranged in the containing cavity, the pump body assembly comprises a crankshaft, a static scroll plate, a movable scroll plate and a support, the crankshaft sequentially penetrates through the support, the movable scroll plate, the static scroll plate and the motor, the crankshaft comprises an eccentric section, and the movable scroll plate is arranged on the eccentric section in a sleeving mode; the outer diameter D of the stator and the outer diameter D1 of the eccentric section meet the relational expression that D / D1 is larger than or equal to 5 and smaller than or equal to 7. The problem that in the prior art, a crankshaft of a scroll compressor is low in reliability can be solved.

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.

The invention discloses a pump body assembly, a compressor and refrigeration equipment, and relates to the technical field of compressors, the pump body assembly comprises an air cylinder, a pump body, a pump body, a pump body, a pump body and a pump body, and the air cylinder is provided with a working cavity and a sliding groove communicated with the working cavity; the piston is eccentrically and rotatably arranged in the working cavity; the sliding piece comprises a sliding piece body and a hinge portion arranged at one end of the sliding piece body, the sliding piece body is arranged in the sliding groove in a sliding mode, the hinge portion is hinged to the piston and provided with a first opposite-grinding face, the piston is provided with a second opposite-grinding face in contact with the first opposite-grinding face, and the second opposite-grinding face is provided with a second opposite-grinding face in contact with the second opposite-grinding face. The surface hardness of the first counter-grinding surface is at least 30% higher than that of the second counter-grinding surface. According to the technical scheme, adhesive abrasion can be effectively reduced, and the problem that abrasion of a hinge structure is aggravated is solved.

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 axial compensation spring structure of a fixed scroll floating compressor, and relates to the technical field of compressors, in particular to the axial compensation spring structure of the fixed scroll floating compressor. The vortex compressor comprises a movable vortex and a fixed vortex which is arranged above the movable vortex and matched with the movable vortex, wherein vortex blades of the movable vortex and the fixed vortex are matched with each other to form a compression chamber; a high-low pressure isolation assembly is assembled above the fixed vortex; a spring device capable of compensating is arranged between the fixed vortex and the high-low pressure isolation assembly; the spring device is one of a middle pressure cavity inner spring device, a high-pressure cavity side spring device and a low-pressure cavity side spring device; one or more spring devices can be arranged. According to the technical scheme of the utility model, the problems of high management cost, part storage and the like caused by assembling and setting the matching level between the fixed vortex and the high-low pressure isolation plate in the prior art are solved.

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).

The invention relates to a variable load leakage and deformation controllable mechanical sealing device, and belongs to the technical field of mechanical sealing.The variable load leakage and deformation controllable mechanical sealing device comprises a shaft sleeve, a shell, a first mechanical sealing mechanism and a second mechanical sealing mechanism, and the shell is provided with a lubricating liquid inlet and a lubricating liquid outlet; the first mechanical sealing mechanism is arranged between the shaft sleeve and the shell, the second mechanical sealing mechanism is arranged between the shaft sleeve and the shell, a liquid cavity is defined by the first mechanical sealing mechanism, the shaft sleeve, the shell and the second mechanical sealing mechanism, and the lubricating liquid inlet and the lubricating liquid outlet are both communicated with the liquid cavity. The pressure of lubricating liquid entering from the lubricating liquid inlet is dynamically changed, the pressure of the lubricating liquid is always larger than the pressure of a medium in the circulating pump, and the pressure difference is within a preset range. The mechanical seal has the advantages that the use effect of the mechanical seal is effectively guaranteed under the condition that the medium pressure in the circulating pump changes, and the mechanical seal can be suitable for the high-pressure variable-load working condition.

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 invention relates to the design and assembly of the stator, stator casing and stator assembly cover used in progressive cavity pumps (PCP) which can pump all liquids, liquid-solid or liquid-gas mixtures even if they have different density, concentration and viscosity values in different industries such as petroleum, food, wastewater treatment.

The utility model relates to a cross slip ring assembly and a scroll compressor. According to one aspect of the utility model, the utility model provides a cross-shaped slip ring assembly, the cross-shaped slip ring assembly is used for a scroll compressor, and the cross-shaped slip ring assembly comprises a cross-shaped slip ring body; the key extends from the cross-shaped sliding ring body and is used for being matched with a key groove formed in a key matching part of the scroll compressor, the key comprises a matching part used for being matched with the key groove, the matching part is provided with a working surface serving as a stress side surface, and the stress side surface is provided with a stress side surface. A groove is provided only at the working surface among the working surface of the mating portion and a non-working surface opposite to the working surface. According to the utility model, the abrasion of the working surface of the matching part of the key of the cross slip ring assembly can be reduced.

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.

The invention discloses a compressor and a refrigerating system. The compressor comprises a machine shell, a motor and a pump body assembly. A cavity is defined by the machine shell. The motor is mounted in the cavity; the pump body assembly is installed in the cavity and comprises a crankshaft, a static scroll plate, a support and a movable scroll plate. Wherein the crankshaft sequentially penetrates through the motor, the static scroll plate, the movable scroll plate and the support, a first scroll tooth part is arranged on the side, close to the movable scroll plate, of the static scroll plate, and a second scroll tooth part meshed with the first scroll tooth part is arranged on the movable scroll plate. And the motor is configured to drive the crankshaft to rotate so as to drive the movable scroll plate and the eccentric part of the crankshaft to synchronously rotate and translate. According to the scroll compressor, the problems of high noise and vibration of the scroll compressor can be solved, meanwhile, the exhaust pressure loss in the compression process of the compressor is reduced, and it is ensured that the performance of the structure and the performance of a traditional scroll reach the same level or above.

An apparatus for use in drywall plastering, and more specifically for applying a pumpable finishing compound to a surface, is disclosed. The apparatus comprises a receptacle for storing the pumpable compound, an applicator for applying the compound to a surface or feature to which the compound is to be applied, a pump for pumping the compound from the receptacle to the applicator for application to the surface or feature, an electric motor which drives the pump, a battery that powers the electric motor, and a conduit through which the compound is pumped from the receptacle to the applicator, and the receptacle, pump, motor and battery of the apparatus may be able to be worn by a user, or carried on a part of the user's body, while the apparatus is in use for applying the compound to the surface or feature. The apparatus is self-contained and self-powered, and it can consequently operate in an “untethered” manner in the sense that it does not require any power cables extending from the apparatus to a remote power outlet or generator, and there is no need for any hoses or the like to deliver finishing compound, or compressed air, or anything like that, to the apparatus while it is in use.

The invention discloses a segmented reverse rotor structure of a two-stage compression oil injection screw compressor. The segmented reverse rotor structure comprises a machine shell, a rotor and a rotor, the first-stage male rotor is rotatably installed in the first-stage compression chamber of the machine shell, and one end of a rotor shaft of the first-stage male rotor penetrates through a partition piece of the first-stage compression chamber and a partition piece of a second-stage compression chamber of the machine shell and extends into the second-stage compression chamber; the first-stage female rotor is rotatably mounted in the first-stage compression chamber and engaged with the first-stage male rotor; the second-stage male rotor is rotatably mounted in the second-stage compression cavity and coaxially connected to a rotor shaft of the first-stage male rotor, and the spiral direction of the second-stage male rotor is opposite to that of the first-stage male rotor; the second-stage female rotor is rotatably mounted in the second-stage compression chamber and engaged with the second-stage male rotor; and the cooling chamber is connected with a cooler through the oil return pipe. The two-stage screw compressor solves the problems that in an existing two-stage screw compressor, the load of axial bearings of the first-stage male rotor and the second-stage male rotor is large, and the service life is short.

An electrical machine is disclosed. The electrical machine includes a rotor rotatable around an axis of rotation and a stator fixed against rotation with respect to the rotor and which concentrically encloses the rotor, forming an annular gap bounded radially between the rotor and the stator and through which a cooling liquid can flow. The stator is at least partially encapsulated by injection molding with a plastic sheathing. A printed circuit board with electronic components arranged on it and a central opening through which a rotor shaft of the rotor protrudes. The plastic sheathing has on a side facing the printed circuit board at least one recess in which at least one electronic component of the printed circuit board engages.

The invention belongs to the technical field of vacuum pumps, and particularly relates to a dry type screw vacuum pump which comprises a base, a plurality of ground feet are arranged at the bottom of the base, a screw vacuum pump body is arranged at the top of the base, and an air inlet and an air outlet are formed in the screw vacuum pump body; and the gas filtering box is installed at the top of the base and used for filtering inlet gas, a plurality of gas inlet holes are formed in one side of the gas filtering box, and a matching hole is formed in the top of the gas filtering box. Gas can be filtered, cooled and dried, dust is prevented from entering the screw vacuum pump body, cooled gas enters the screw vacuum pump body, the internal temperature of the screw vacuum pump body can be reduced, and the situation that the service life is affected by the high temperature of the screw vacuum pump body is avoided; the fixing of the fixing box and the gas filtering box can be removed only by turning over the handle upwards, and then the dust filtering mechanism and the gas drying mechanism can be detached to be cleaned or maintained by pulling the handle upwards.

Eccentric screw pump with a rotor of a drive shaft circulating essentially about a fixed axis in relation to the stator in a bearing block, 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 adjusts the differences of the motion sequences of the screw conveyor and of the drive shaft, wherein the power train consists essentially of a one-piece rotational body, which has multiple weakening recesses, which interrupt its outer circumferential jacket surface more than only insignificantly and which provide it with that reversible elasticity, which it requires in order to rotate about an axis of rotation, which curves in a periodically recurring manner at least in sections.

A front cover and a rear cover are fixedly installed and define a cavity, a driving gear shaft and a driven gear shaft are installed in the cavity, a first gear on the driving gear shaft is meshed with a second gear on the driven gear shaft, and the two gears and the inner wall of the cavity define an oil suction cavity and an oil discharge cavity. The two floating side plates are arranged on the two sides of the two gears in a penetrating mode through the driving gear shaft and the driven gear shaft respectively, an ear-shaped high-pressure oil groove and an unloading groove are formed in the face, close to the gears, of each floating side plate, the ear-shaped high-pressure oil grooves are close to one side of the oil discharge cavity, the unloading grooves are close to one side of the oil suction cavity, and the two ends of the unloading grooves are communicated with through holes of the floating side plates respectively. An ear-shaped groove is formed in the face, away from the gear, of each floating side plate, and a compensation area is formed on the floating side plates around the ear-shaped grooves. And a radial gap is formed between the peripheral edge of the floating side plate and the inner wall of the cavity. The comprehensive performance of high pressure, large displacement, low noise and high efficiency of the bevel gear pump is improved.

The utility model provides a Roots blower with a double-oil-pump circulating cooling device, which comprises a Roots blower main body and the double-oil-pump circulating cooling device, the Roots blower main body comprises an oil tank, a driving end wall plate and a non-driving end wall plate, and the double-oil-pump circulating cooling device comprises a first oil pump, a second oil pump and a cooler. The oil tank communicates with the first oil pump and the second oil pump, the first oil pump and the second oil pump are connected in parallel, and the rear ends of the first oil pump and the second oil pump are connected with the driving end oil pipe assembly, the gear end oil pipe assembly and the non-driving end oil pipe assembly correspondingly to lubricate and cool the driving end bearing, the non-driving end bearing, the driving gear and the driven gear correspondingly. The first oil pump and the second oil pump can independently operate to achieve circulating cooling of lubricating oil, when one oil pump breaks down, the other oil pump can be switched to operate in the non-stop state, and long-time stable operation of the air blower is guaranteed. The circulating cooling device can be widely applied to circulating cooling of the roots blower.