586results about "Rotary piston pumps" patented technology

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 method for inspecting an erroneous / missing part of a discharge valve structure according to the present invention is a method for inspecting the erroneous / missing part of the discharge valve structure (1) of a compressor. The discharge valve structure (1) has an assembly structure including a partition wall (12), a discharge valve (12), a valve retainer (300) and a fixing bolt (40), and an inspection structure in which the valve retainer has an inspection hole (33) for inserting an inspection member and at least a part or the whole of the discharge valve enters a region of the discharge valve (20) corresponding to the inspection hole (33). The presence or absence of the discharge valve is inspected by inserting the inspection member into the inspection hole and by an insertion depth of the inspection member.

The application discloses a compressor, a control method, an electronic device, a thermal management system and a vehicle, and the compressor comprises a shell and a plurality of compression units arranged in the shell. The compressor provided by the application has a plurality of compression units, can meet various working conditions, and increases the application range of the compressor.

According to the present invention, a fluid machine includes: a cylinder; a main shaft having a rotation center that coincides with an operation center of the cylinder; an eccentric shaft fixed to the main shaft, and configured to maintain and rotate at an eccentric interval (d) from the main shaft; a rotation / revolution shaft configured to rotate / revolve on the eccentric shaft; a rotary piston coupled integrally with the rotation / revolution shaft to rotate, and having a center that is eccentric to the rotation / revolution shaft by a distance (r) that is equal to the eccentric interval (d) (d=r); and a rotation ratio restraining device configured to restrain a rotation ratio of a main shaft rotational angular velocity (x) and a rotary piston rotational angular velocity (y) to 1:2.

A barrier for controlling cooling within a sealed cooled motor and a compressor including the barrier are provided. The barrier includes an insulator, at least one fastener, and a vent. The insulator restricts flow of working fluid between a first side and a second side. The at least one fastener secures the insulator. The vent controls a pressure differential between the first side and the second side. The vent can include at least one hole through the insulator. The vent can be provided as a hole through the insulator for a rotating shaft of the compressor.

The utility model discloses an integrated type swing cycle pump lubricating device, including pump casing, inner rotor and outer rotor, be provided with oil cavity and with oil inlet and oil outlet of oil cavity communication on the pump casing, its characterized in that, the bottom of oil cavity is provided with annular unloading groove with oil outlet communication, and the bottom surface of annular unloading groove is multistage step surface. This integrated type swing cycle pump lubricating device can effectively buffer fluid resistance and pulsation, reduce cavitation and cavitation erosion phenomenon, and stabilize oil pressure of oil outlet.

The embodiment of the utility model provides a kind of compression positioning assembly and scroll compressor, wherein, compression positioning assembly includes: mainframe, and the assembly hole for crankshaft is passed is equipped on mainframe, and the first cooperation part extending along the axial direction;Static scroll structure, be located on mainframe, static scroll structure is equipped with the second cooperation part that projects outwards along radial direction;Limiting ring, cover static scroll structure outer, limiting ring is located at the axial one end of second cooperation part, and the outer diameter of second cooperation part is greater than the inner diameter of limiting ring, to limit the axial floating range of static scroll structure;The circumferential movement of static scroll structure is limited by positioning structure, and the radial movement of static scroll structure is limited by the clearance cooperation between the inner periphery surface of first cooperation part and the outer periphery surface of second cooperation part.The technical scheme of the utility model limits the displacement of static scroll structure in circumferential direction, axial direction and radial direction, reduces the processing difficulty of static scroll structure and mainframe, improves processing efficiency.

The application discloses a jet augmenting heat pump compressor for an electric vehicle, which comprises a static vortex disc provided with a working cavity and a top cover arranged on the top of the static vortex disc, a jet augmenting pipeline assembly is arranged on the top cover, the integrated jet augmenting pipeline assembly is communicated with the working cavity, and the jet augmenting pipeline assembly comprises an external jet augmenting pipeline which is inserted and connected with the top cover. The jet augmenting pipeline assembly is arranged in the top cover above the static vortex disc, the jet augmenting pipeline assembly is embedded in the top cover, the heat pump compressor has the jet augmenting effect without occupying too much arrangement space in the vehicle, and the performance of the compressor is effectively improved.

To suppress a decrease in the operating rate of a compressor when a test run of a predetermined compressor unit is performed. [Solution] The compressor includes a plurality of compressor units, each having a compressor body that compresses gas and a motor that drives the compressor body, piping that connects the plurality of compressor units, and a control device that controls the plurality of compressor units. The control device stops operation of a compressor unit that satisfies an abnormal stop condition among the plurality of compressor units, and performs a test run of the compressor unit that satisfies the abnormal stop condition while continuing the number-controlled operation of the other compressor units.

According to the present invention, a fluid machine includes: a cylinder; a main shaft having a rotation center that coincides with an operation center of the cylinder; an eccentric shaft fixed to the main shaft, and configured to maintain and rotate at an eccentric interval (d) from the main shaft; a rotation / revolution shaft configured to rotate / revolve on the eccentric shaft; a rotary piston coupled integrally with the rotation / revolution shaft to rotate, and having a center that is eccentric to the rotation / revolution shaft by a distance (r) that is equal to the eccentric interval (d) (d=r); and a rotation ratio restraining device configured to restrain a rotation ratio of a main shaft rotational angular velocity (x) and a rotary piston rotational angular velocity (y) to 1:2.

The application relates to a permanent magnet mechanism for a scroll compressor and an optimization method thereof. The permanent magnet mechanism comprises permanent magnet groups, a dynamic ring and a static ring. The permanent magnet groups are fixed on the static ring in a circumferential direction and face a gas gap. Each permanent magnet group is divided into multiple permanent magnet sub-blocks in a circumferential direction and a radial direction. The inner diameter of the dynamic ring is larger than that of the static ring, the outer diameter of the dynamic ring is smaller than that of the static ring, and when the dynamic ring moves with a dynamic scroll, the projection of the dynamic ring in an axial direction is always enclosed in the projection of the static ring in the axial direction. The optimization method comprises the following steps: performing characteristic analysis on the axial gas force of the scroll compressor to determine a target axial force curve; performing analysis on key parameters of the permanent magnet mechanism; designing a permanent magnet sub-block scheme and performing sensitivity analysis on the optimal sub-block scheme. The permanent magnet mechanism can ensure that the scroll compressor is always in a state of not being under-sealed, effectively provides an axial magnetic force which changes with the rotation angle of a main shaft, and further balances the axial gas force.

This invention introduces a highly efficient device designed to convert rotational motion into translational motion for industrial applications It features a robust transmission system with key components, including a crankshaft, transmission disc, and advanced bearings to ensure smooth operation and load balance. The cantilever eccentric shaft arrangement, featuring both eccentric and concentric portions, minimizes vibration while optimizing motion conversion. The system includes balancing weights and a dynamic load balancing mechanism for superior performance. A flexible drive system, incorporating pulleys and timing belts, supports both forward and reverse motion. An automatic grease system ensures reduced friction and long-term durability. This device is particularly suitable for applications such as compressors, pumps, and agitators, providing high precision, efficiency, and ease of maintenance. Its innovative design addresses the growing demand for reliable, scalable motion conversion solutions in industries requiring high performance and operational longevity.

A rotor-stator assembly for a rotary engine, compressor or pump, includes a rotor arranged to rotate eccentrically in a stator chamber, the geometry of the rotor being configured to provide a first fluid seal at a region of maximum proximity between the outer peripheral surface of the rotor and the inner peripheral wall of the stator chamber. A second fluid seal is provided by means of a component rotating with the rotor, one end of which is permanently connected to the inner surface of the stator chamber by means of bearings and slides along the inner surface of the stator chamber, and the other end of which is accommodated in a radially movable manner in a receptacle of the rotor, the first and second fluid seals delimiting a first chamber portion and a second chamber portion of the stator chamber.

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 three screw rod pump technical field, concretely relates to three screw rod pump for conveying high temperature lubricating grease, including double -deck heat preservation pump body, shaft seal, screw rod to be used for double -deck heat preservation pump body's double -deck welding type heat preservation mechanism, be used for shaft seal's mechanical seal flushing mechanism, be used for screw rod's axial thrust mechanism. The three screw rod pump for conveying high temperature lubricating grease, through having the double -deck welding type with heat preservation function's double -deck heat preservation pump body design, make it in the conveying high temperature lubricating grease pumping process, realize high pressure material in low pressure chamber when in overpressure is introduced, through having the shaft seal design with mechanical seal flushing system, reliably realized the shaft seal problem of high temperature lubricating grease, through the combination use under double -deck welding type heat preservation mechanism, mechanical seal flushing mechanism, axial thrust mechanism, can completely realize the safe long -life pumping of high temperature lubricating grease, pulsation is low, no shear, and this method is simple, economic, continuous, is suitable for the conveying process of high temperature lubricating grease.

A co-rotating scroll compressor includes a housing having a discharge portion, and a compression mechanism disposed in the housing. The compression mechanism has a compression chamber, a discharge chamber, and a rotating shaft portion that is supported by the housing via a bearing. The discharge chamber has a diameter larger than the bearing. The rotating shaft portion has a discharge communication portion through which fluid discharged into the discharge chamber to flow to the discharge portion. A change of a phase between the discharge portion and the discharge communication portion with rotation of the rotating shaft portion changes a flow resistance for the fluid flowing from the discharge communication portion to the discharge portion. The discharge portion and the discharge communication portion reach a phase in which the flow resistance increases as a flow rate of the fluid discharged from the compression chamber to the discharge chamber approaches a maximum.

The application provides a compressor back pressure adjusting structure and a compressor. The compressor back pressure adjusting structure comprises a support for supporting a compression assembly of the compressor; a main body arranged on the support, wherein a gas flow discharged by the compression assembly can at least partially flow between the main body and the support and push the support to rotate; and a plurality of first channels with different flow areas are arranged on the main body, wherein the first channels have first ends and second ends, the first ends are open towards the compression assembly, and the second ends are arranged on the outer wall of the main body, and the gas flow between the main body and the support flows into one of the first channels through the second end and is discharged from the first end. According to the application, the defect that the back pressure of the compressor cannot be adjusted in the prior art, which leads to poor stability of the compressor in operation, can be overcome, and the volumetric efficiency of the compressor can be effectively improved and the power consumption of the compressor can be reduced.

A scroll compressor is provided. The scroll compressor includes a housing, a fixed scroll member and an orbiting scroll member housed in the housing, the orbiting scroll member configured to be engaged with the fixed scroll member and orbitable with respect to the fixed scroll member to compress a working fluid, a partition configured to partition a space in the housing into a high-pressure chamber and a low-pressure chamber, and a positioning member provided between the partition and the fixed scroll member and configured to position one of the partition and the fixed scroll member with respect to the other of the partition and the fixed scroll member upon assembly. According to the scroll compressor of the present disclosure, by positioning the positioning member directly between the partition and the fixed scroll member, a tolerance chain between a discharge assembly and the fixed scroll member is shortened, and a tolerance between the discharge assembly and the fixed scroll member can be reduced.

An electric compressor in which a through hole through which a terminal pin electrically connecting an inverter unit to a motor unit passes is formed in a partition wall, and the terminal pin is integrally injection-molded into the through hole together with a fixing unit, thereby sealing a gap between the terminal pin and a housing without a separate sealing member and an assembly member, and enabling modularization of the housing and the terminal pin.

Provided is a compressor that can suppress a phenomenon that a gas refrigerant reversely flows from between a closed discharge valve and an end plate. The compressor includes: a fixed side end plate (211) in which a main port (213) communicating between a compression chamber for compressing a refrigerant and a discharge chamber (C2) to which the compressed refrigerant is guided is formed; and a leaf valve (610) configured to open and close a discharge port (213a) located on the discharge chamber (C2) side of the main port (213), a groove (214) is formed around the discharge port (213a) in a face of the fixed side end plate (211) where the discharge port (213a) is opened, and when the fixed side end plate (211) is planarly viewed, the groove (214) is overlapped with a portion on a free end (611) side of the leaf valve (610) in a closed state.

The utility model relates to a scroll compressor, the scroll compressor includes: compression mechanism, compression mechanism is limited in the inside of compression mechanism for inhaling, compressing and discharging a series of working cavity of working fluid, and main bearing seat, main bearing seat supports compression mechanism, and main bearing seat includes the recess containing lubricating oil, wherein, the scroll compressor still includes oil guide structure, and the oil guide structure includes the oil inlet part of communication with the recess, the oil outlet part of communication with the working cavity and the oil guide pipe of communication with the oil inlet part and the oil outlet part, so that lubricating oil can flow into the working cavity from the recess through the oil inlet part, the oil guide pipe and the oil outlet part, wherein, the oil guide pipe is arranged in the internal space of scroll compressor. According to the oil guide structure of the utility model's scroll compressor, it is easy to process and assemble, is not easy to be damaged and can improve the lubrication effect of the contact surface of the fixed scroll and the moving scroll in the working cavity.

A constant-flowrate fuel pump, comprising a pump body, a driving assembly and, arranged on the pump body, a fuel inlet pipe and fuel outlet pipes. The pump body is provided with a chamber, the driving assembly being arranged in the chamber and used for sucking fuel into the chamber or discharging the fuel from the chamber. A first end of the fuel inlet pipe is provided with a fuel inlet for the fuel to flow in; the wall of the fuel inlet pipe is provided with a fuel inlet hole leading to the chamber, the fuel entering the fuel inlet pipe via the fuel inlet and being sucked into the chamber via the fuel inlet hole. The fuel outlet pipes are arranged on a side of the fuel inlet pipe and are spaced apart from each other; a first end of each fuel outlet pipe is provided with an fuel outlet for the fuel to flow out; the wall of each fuel outlet pipe is provided with an fuel outlet hole leading to the chamber; the fuel in the chamber is discharged into the fuel outlet pipes via the fuel outlet holes, and is discharged by means of the fuel outlets of the fuel outlet pipes. On the basis of a target flowrate of the fuel pump, the diameter of the fuel inlet hole is less than a preset diameter, the target flowrate and the preset diameter satisfying a relationship between flowrates and diameters of the fuel inlet hole.

This invention relates to the field of rotary compressor technology, specifically disclosing a rotary compressor and refrigeration equipment. The rotary compressor includes a housing and a compression assembly disposed within the housing. The compression assembly includes a cylinder body, a piston, a drive motor, and a crankshaft. The piston is eccentrically rotatably disposed within the compression chamber of the cylinder body. The crankshaft is connected to the piston, and the drive motor is driven by the crankshaft to rotate the piston. The inner diameter of the cylinder body is Dc, and the outer diameter of the drive motor is Dm. Therefore, 2.24 ≤ Dm / Dc ≤ 3.15. By limiting the ratio of the inner diameter Dc of the cylinder body to the outer diameter Dm of the drive motor within the above-mentioned range, this design minimizes the inner diameter Dc of the cylinder body during the rotary compressor design process, while ensuring stable operation. This reduces radial leakage, lowers frictional losses, improves compressor performance, lowers compressor power consumption, and optimizes the overall performance of the compressor.

The utility model discloses a variable diameter variable pitch screw rotor, including intermeshing left rotors and right rotors, the end face profile of left rotors with right rotors is same, all by 7 curves first and last connected closed, wherein 7 curves include involute section AB, circular arc section BC, dedendum circular arc section CD, circular arc section DE, cycloid equidistant curve section EF, dedendum circular arc section FG and circular arc conjugate curve section GA, the circular arc BC of left rotors is intermeshed with the circular arc conjugate curve A'G' of right rotors, and the rest line sections are sequentially intermeshed according to the rotating direction of left rotors and right rotors respectively, the screw pitch of left rotors and right rotors is segmented along the axial direction, the left rotors are conical along the air inlet end to the air outlet end, and the right rotors are conical along the air inlet end to the air outlet end. The utility model further provides a vacuum pump. The device provided by the utility model can effectively improve the internal compression ratio and efficiency of the vacuum pump.

To provide a dual-rotation scroll compressor that exhibits high quietness while suppressing a decrease in efficiency. [Solution] The compressor of the present invention comprises a housing 6 and a compression mechanism 14. A discharge section 63 is formed in the housing 6. The compression mechanism 14 has a compression chamber 12 and a discharge chamber 91, as well as a rotating shaft section 37d. The rotating shaft section 37d is rotatably supported in the housing 6 via a bearing 52. The discharge chamber 91 is formed to have a larger diameter than the outer diameter of the bearing 52. A discharge connecting section 38 is formed in the rotating shaft section 37d. In this compressor, the flow resistance changes as the phase between the discharge section 63 and the discharge connecting section 38 changes with the rotation of the rotating shaft section 37d. Furthermore, the flow resistance between the discharge section 63 and the discharge connecting section 38 increases as the flow rate of the fluid discharged from the compression chamber 12 to the discharge chamber 91 approaches its maximum.

Provided is a multi-stage double-shaft rotary pump and a multi-stage claw pump that can efficiently cool a multi-stage pump chamber and a rotor by air cooling or water cooling. The pump chamber is provided in multiple stages, has two rotary shafts (20A, 20B) and two rotors (21A, 21B, 22A, 22B) disposed in each stage of the pump chamber (11, 12), and has, in an inter-stage portion (30) disposed between a front-stage pump chamber (11) having a front-stage pump exhaust-side end wall (11a) provided with an exhaust port (11b) and a rear-stage pump chamber (12) having a rear-stage pump intake-side end wall (12a) provided with an intake port (12b), an inter-stage communication chamber (33) that communicates the exhaust port (11b) and the intake port (12b) at a middle in a left-right direction, a one-side inter-stage liquid cooling flow path (31) that enables cooling air or a coolant to flow from a lower side to an upper side on one side of the left-right direction, and a other-side inter-stage liquid cooling flow path (32) that enables cooling air or a coolant to flow from a lower side to an upper side on the other side of the left-right direction.

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.

The utility model discloses a cantilever type sanitary double screw pump, including the pump body, the pump head is arranged to one side of pump body, and the gear box is arranged to the other side, and the pivot is through setting between the pump head, pump body and gear box, the pump head, pump body and gear box can be disassembled and assembled, and the mechanical seal is arranged in the pump body, the gear is arranged in the gear box, the pump head includes the rotor cavity and the pump cavity of disassembled and assembled, the rotor is arranged in the rotor cavity, and the pump cover can be disassembled and assembled to one side of rotor cavity, and the import flange is arranged on the pump cover, the pump cavity is through with the rotor cavity, and the export flange is arranged to one side wall of pump cavity. The screw pump structure of the application is compact (small in volume), adopts three -section type design, and is convenient for the disassembly and cleaning of parts, the outer wall four sides of pump body are all set up mounting assembly, allow installing screw pump from four directions, can according to the actual situation of the scene flexible adjustment import and export direction, reduced the complex pipeline conversion demand.