964results about "Multi-stage pumps" patented technology

A pump system includes a housing defining a first internal volume and a second internal volume, a first piston positioned to separate the first internal volume into a first chamber and a second chamber, a second piston positioned to separate the second internal volume into a third chamber and a fourth chamber, a first inlet check valve configured to permit fluid flow into the first chamber, a second inlet check valve configured to permit fluid flow into the third chamber, a directional control valve (DCV) repositionable between (a) a first position where the DCV is configured to fluidly couple the second chamber to a high pressure fluid source and (b) a second position where the DCV is configured to fluidly couple the fourth chamber to the high pressure fluid source, and a relief valve configured to supply a fluid to the DCV through an orifice to move the DCV.

The invention discloses an anti-liquid-impact compressor cylinder structure, a compressor and a wellhead natural gas compression method, and relates to the technical field of compressors, the cylinder structure comprises a cylinder barrel and a piston ring assembly, a piston cavity is formed in the cylinder barrel, the cylinder structure further comprises a partition plate, the partition plate divides the piston cavity into a working cavity and a buffering cavity, and the piston ring assembly is arranged in the working cavity; the communication channel is used for realizing mutual communication of the working cavity and the buffer cavity on the two sides of the partition plate; the partition plate is configured in the mode that when the pressure difference between the pressure of the working cavity and the pressure of the buffer cavity exceeds a set threshold value, the fixed relation of the partition plate in the piston cavity is damaged under the pressure difference between the two sides of the partition plate, the partition plate can move towards the side where the buffer cavity is located under the pressure difference, the compressor comprises the cylinder body structure, and the compression method is achieved based on the cylinder body structure. According to the scheme, the maximum pressure in the cylinder is reduced by adopting a method of expanding the clearance volume of the cylinder body when the liquid impact phenomenon occurs, and the response speed in the clearance volume expanding process can be effectively optimized.

The invention provides a combustion drive circulating gas-lift pressurizing all-in-one machine, and belongs to the technical field of natural gas production. Comprising a pressurization exhaust system, a gas lift pressurization system, a sewage discharge system, a pressure stabilizing system, a combustion drive multi-stage compression system and a base, and the pressurization exhaust system, the gas lift pressurization system, the sewage discharge system, the pressure stabilizing system and the combustion drive multi-stage compression system are all installed on the base. By arranging the pressurization exhaust system and the gas lift pressurization system, the device can perform gas lift and pressurization operation in an oil field, one machine has two purposes, by arranging the combustion drive multi-stage compression system, efficient dispatching of an oil and gas field circulation gas lift pressurization site is achieved, powerful guarantee is provided for development of the dual-carbon industry, and meanwhile, the device has good application prospects. By arranging the purification assembly, the natural gas in the well rises, so that the purity of the extracted natural gas is improved, and the problems that an existing gas lifting and pressurizing all-in-one machine is high in use cost and poor in effect are solved.

The invention relates to a cold compressor and a dilution refrigerator adopting the cold compressor, the cold compressor comprises a driving part, an air cylinder and a piston, and further comprises a precooling refrigerator, the precooling refrigerator is connected with the air cylinder, and the compressor is precooled through the precooling refrigerator. The cold compressor can be used on a dilution refrigerating machine or a space dilution refrigerating machine, and compared with the prior art, the refrigerating machine is adopted for cooling the compressor, so that the compressor becomes the cold compressor, and therefore it is ensured that helium-3 is compressed at the low temperature.

A capacity control valve includes a main valve that opens and closes communication between a discharge port and a control port formed in a valve housing by movement of a rod driven by a solenoid, a CS communication passage providing communication between a control fluid supply chamber formed in the valve housing and a suction port, and an on-off valve formed by a communication passage forming member having an annular valve seat in an outer periphery of the CS communication passage and an on-off valve element biased in the valve closing direction with respect to the valve seat.

The utility model discloses a gas loss detection device and a compressor, and aims to solve the technical problems that the detection of the hydrogen leakage rate of the compressor is inaccurate, and leaked hydrogen is not recycled. The gas loss detection device comprises a recovery pipeline, a compression detection mechanism, a pneumatic control valve and a high-pressure separator are arranged on the recovery pipeline, the compression detection mechanism is communicated with an isolation cavity of a compressor, and hydrogen in the isolation cavity enters a hydrogen buffer tank of the compression detection mechanism to be stored and compressed; after being purified by the high-pressure separator, the hydrogen enters a gas inlet pipeline of the compressor to be reused, so that the waste of hydrogen is avoided and the cost is reduced; and a pressure gauge of the compression detection mechanism detects the pressure of the buffer tank, records the relationship between pressure change and time at a control end, and calculates the leakage rate of the compressor so as to judge the sealing performance of the compressor cylinder.

A light-weight gas compressor convenient to move relates to the field of gas compressors, and is characterized in that three forward cylinders and three reverse cylinders which are arranged in a staggered manner are uniformly fixed on the outer edge surface of an annular plate; the forward air cylinder B is connected with the reverse air cylinder A, the reverse air cylinder A is connected with the forward air cylinder A, the forward air cylinder A is connected with the reverse air cylinder B, the reverse air cylinder B is connected with the forward air cylinder C, the forward air cylinder C is connected with the reverse air cylinder C, and the reverse air cylinder C is connected with an exhaust pipe; the power of the double-end piston rod hydraulic oil cylinder is provided by an oil supply hydraulic oil cylinder A and an oil supply hydraulic oil cylinder B; the double-end piston rod hydraulic oil cylinder arranged in the annular plate is used for controlling the three reverse air cylinders and the three forward air cylinders to achieve gas compression, and the purpose of gas compression which is light in weight and convenient to move is achieved.

High pressure compressor system for compressed air or gas rifles or pistols comprising a motor (1) that rotates a shaft (2) connected to at least one crankshaft (32) having at least two crankpins (7,8), a first crankpin (7) and a second crankpin (8), each of which is respectively attached to connecting rods (3, 4), which connecting rods (3, 4) are outphased with respect to one another: a first connecting rod (3) a second connecting rod (4), a second piston (12), and a second sleeve (13) surrounding the first piston (11), and at least partially surrounding the second piston (12) and both crankpins (7, 8), said second sleeve (13) being connected to the first sleeve (28) and including through holes (5, 6) for the fluid to pass into the second sleeve (13), and at least one guide tube (14, 19) that surrounds the second sleeve (13) and, at least partially, the second piston (12), and a second valve (16) that defines a fluid inlet into the second sleeve (13).

The utility model relates to a shell assembly, a gas compression and supply device, an air suspension system and a vehicle, the shell assembly is used for the gas compression device and comprises a shell and a heat dissipation flow channel, the shell is provided with a containing cavity used for containing a piston mechanism, and the containing cavity is divided into a first-stage compression cavity and a second-stage compression cavity through the piston mechanism; the heat dissipation flow channel is communicated with the first-stage compression cavity and the second-stage compression cavity, and at least part of the heat dissipation flow channel is formed in the shell so that heat dissipation can be conducted on gas flowing through the heat dissipation flow channel through the heat dissipation flow channel, the internal temperature of the gas compression device can be reduced, the performance of the gas compression device can be optimized, and the gas compression device has the advantages of being simple in structure and convenient to install and manufacture.

A ball support arrangement for a piston shoe arrangement (1), wherein the piston shoe arrangement (1) is configured to be provided in an axial piston machine, wherein the piston shoe arrangement (1) includes a piston body (2) having a ball shaped end (3) and a piston shoe (4), wherein the ball shaped end (3) is provided in the piston shoe (4), wherein the ball support arrangement is arranged between the piston shoe (4) and the balls shaped end (3). The objective of the present invention is to provide a ball support arrangement, which is easy to replace and low on maintenance. This objective is solved by a ball support arrangement, which is separate and replaceable, wherein at least a ball portion (5) of the ball support arrangement is configured to accommodate at least part of the ball shaped end (3).

The reciprocating compressor comprises a compressor frame, a crankshaft and a connecting rod, connecting the crankshaft to a crosshead. A piston rod connects a piston to the crosshead. The piston reciprocates in a gas compression cylinder. At least one pressure-drop module is positioned between the gas compression cylinder and a crosspiece guide. The piston rod extends from the gas compression cylinder through a pressure-drop chamber of the pressure-drop module. Also disclosed herein is a method of operating a reciprocating compressor.

The present invention relates to a piston-cylinder assembly for a radial piston compressor. The piston-cylinder assembly comprises a drive shaft with a cylindrical eccentric for guiding the movement of the piston to a top dead center position. A cylindrical piston guide ring guides the movement of the piston to a bottom dead center. Both the cylindrical eccentric and the piston guide ring are connected to the piston by means of respective concave / convex contact surfaces for the positive transmission of the forces.

The utility model discloses an oiled two-stage air compressor and a vehicle. The oiled two-stage air compressor comprises an oil pump, a crankshaft, a low-pressure piston connecting rod assembly and a high-pressure piston connecting rod assembly, wherein the crankshaft is used for connecting the oil pump with a power device in a transmission manner; when the oiled two-stage air compressor is in a running state, the low-pressure piston connecting rod assembly and the high-pressure piston connecting rod assembly are driven by the crankshaft to do reciprocating motion, and the contact faces, connected with the crankshaft, of the low-pressure piston connecting rod assembly and the high-pressure piston connecting rod assembly are provided with lubricating oil sucked through an oil pump. The two-stage supercharging structure is adopted, external lubricating oil pipes are removed, meanwhile, the crankcase and the oil tank are designed in an integrated mode, and therefore sealing faces are reduced, the pipeline leakage risk is effectively reduced, and high efficiency and saving are achieved.

A compression unit for ammonia comprising a multi-stage compressor, including a first set of compressor stages adapted to compress a syngas containing hydrogen and nitrogen; and a second set of compressor stages adapted to compress a refrigerant of a refrigerant circuit. Described herein is also an ammonia production system including the ammonia compression unit and a method.

The invention provides a water-cooling integrated piston air compressor, which belongs to the technical field of air compressors, and comprises an air compressor, a driving motor, a steering pump and a controller, the air compressor and the steering pump are arranged at the two ends of the driving motor respectively, and the controller is fixed to the driving motor. The driving motor is provided with two power output ends which are mutually independent and are respectively controlled by the controller, one power output end is connected with the power input end of the air compressor, and the other power output end is connected with the power input end of the steering pump. The controller, the driving motor and the air compressor are all provided with cooling water channels, the cooling water channels of the controller, the driving motor and the air compressor are communicated, a water inlet is formed in the controller, and a water outlet is formed in the driving motor; and cooling water entering from the water inlet sequentially passes through the controller, the driving motor and the cooling water channel of the air compressor, finally returns to the cooling water channel of the driving motor and is discharged from the water outlet. According to the water-cooling integrated piston air compressor provided by the invention, the structure compactness and the operation energy-saving performance of the whole air compressor are improved.

A compression system comprising a compressor, the compressor comprising a sealing arrangement including at least one gas seal. A gas leakage recovery line is adapted to recover process gas leakages from the at least one gas seal. A fuel cell arrangement is fluidly coupled to the gas leakage recovery line. The fuel cell arrangement is adapted to process gas leakages and generate electric power therefrom.

The invention discloses a volume type hydrogen compressor cylinder body structure and a hydrogen compressor system, and belongs to the technical field of compressors, the compressor system comprises the cylinder body structure, the cylinder body structure comprises a cylinder body, piston assemblies and a piston rod, and the piston assemblies comprise the first piston assembly and the second piston assembly; each of the first piston assembly and the second piston assembly comprises a piston ring and a guide ring; an air guide hole is formed in the piston rod, an annular groove is formed between the first piston assembly and the second piston assembly, and one end of the air guide hole communicates with the annular groove; the pressure sampling device further comprises a pressure sampling cylinder, a cavity is formed in the pressure sampling cylinder, and when the piston assembly is in the gas compression stroke, the other end of the gas guide hole is communicated with the cavity. And the pressure sensor is used for measuring the pressure in the cavity. According to the structural design provided by the scheme, online monitoring of the sealing condition of the piston assembly and the air cylinder wall can be achieved, and compared with technologies based on vibration monitoring, sound wave monitoring and the like, adverse effects of the data extraction and analysis process on the monitoring result can be avoided.

A compressor includes a housing, a first compression mechanism and a second compression mechanism disposed in the housing, and a housing cover fixed to the housing. Both the first compression mechanism and the second compression mechanism are configured to compress a working fluid from a suction pressure to a discharge pressure. The first compression mechanism includes a first cylinder housing having a first fluid storage plenum. The second compression mechanism includes a second cylinder housing having a second fluid storage plenum. The housing cover defines an intermediate-fluid port in fluid communication with the first fluid storage plenum via a first intermediate-fluid passage and the second fluid storage plenum via a second intermediate-fluid passage. Working fluid at an intermediate pressure enters the intermediate-fluid port. The intermediate pressure is greater than the suction pressure and less than the discharge pressure.

The utility model discloses a two-way output air compressor which comprises a driving machine shell, a motor shaft is fixedly connected with two eccentric wheels, each eccentric wheel is internally provided with a rolling groove, the rolling grooves are internally connected with rotating shafts in a rolling mode, through holes are fixedly connected with pressurizing pipes which are coaxially aligned with connecting rods left and right, and the directions of the two pressurizing pipes are opposite. The pressurizing pipes are slidably connected with the connecting rods, the connecting rods are fixedly connected with pistons located in the pressurizing cavities, the pistons are slidably connected with the pressurizing pipes in a sealed mode, and each pressurizing pipe is fixedly connected with a one-way air outlet valve and a one-way air inlet valve which are communicated with the corresponding pressurizing cavity. When the eccentric wheel rotates, the rotating shaft rolls along the rolling groove, so that the piston is driven to move, air enters from the one-way air inlet valve and flows out from the one-way air outlet valves to the air storage pipe, air compression is achieved, two-way output is achieved through the two one-way air outlet valves, and air compression of the air storage tank in two directions is achieved.

The invention relates to a high-pressure heavy-load piston compressor for supercritical carbon dioxide and a working method of the high-pressure heavy-load piston compressor. The high-pressure heavy-load piston compressor comprises a compressor body, a driving motor and a compressor shell. The compressor body comprises a plurality of air cylinders, each air cylinder comprises an air cylinder body and an air cylinder cover which are sequentially arranged from bottom to top, a compression chamber is arranged in each air cylinder body, a piston is arranged in each compression chamber, an exhaust cavity located at the top of each compression chamber is formed in each air cylinder cover, and each piston comprises a main piston matched with the corresponding compression chamber to work. The upper end of the main piston is provided with an auxiliary piston which protrudes upwards and can stretch into the exhaust cavity when the piston moves to the upper dead center, and the auxiliary piston is of a smooth curved surface structure. By optimizing the auxiliary piston, the motion resistance of the piston is reduced, the efficiency of the compressor is improved, and the failure risk of the auxiliary piston is reduced; the larger width of the bearing bush can stably transmit larger piston force, and abrasion of a connecting pair can be reduced, so that the service life of the bearing bush is prolonged, the capacity of the connecting rod for resisting toppling moment is improved, and an air cylinder operates more stably.

The utility model discloses a multi-stage compression gas compression system which comprises a hydraulic driving unit with fixed displacement, a multi-stage compression cylinder, a gas storage device, a gas pressure detection unit and a control unit, the multi-stage compression cylinder comprises a plurality of compression cylinders which are sequentially connected in series from the first stage to the last stage through gas conveying pipelines. The signal output end of the air pressure detection unit is connected with the signal input end of the control unit. The air pressure detection unit is used for detecting air pressure signals of the multi-stage compression cylinder and sending the air pressure signals to the control unit. And the control unit is used for controlling the working states of the other stages of compression cylinders except the first-stage compression cylinder in the multi-stage compression cylinders according to the air pressure signal, so that the other stages of compression cylinders except the first-stage compression cylinder in the multi-stage compression cylinders are put into compression work or quit compression work. According to the utility model, the cost and the control complexity of the gas compression system can be reduced, and the efficiency improvement and consumption reduction of the gas compression system can be realized.

The invention relates to the technical field of vacuum equipment, in particular to a two-stage low-temperature vacuum pump which comprises a pump body and a pressurizing assembly, and a liquid adding cavity is formed in the pump body; the pressurizing assembly comprises an air cylinder, a movable part and a liquid discharging part, the air cylinder is coaxially located in the liquid adding cavity and is divided into a first-stage barrel and a second-stage barrel, one end of the first-stage barrel is connected to the pump body, the inner diameter of the second-stage barrel is smaller than that of the first-stage barrel, the movable part comprises a piston rod, a first-stage safety valve and a liquid outlet valve, and the piston rod sequentially penetrates through the pump body, the first-stage barrel and the second-stage barrel; the piston rod slides back and forth in the axis direction of the pump body, the piston rod, the primary safety valve and the primary barrel form a primary compression cavity, an injection port is formed in the end, close to the secondary barrel, of the primary barrel, the piston rod, the liquid outlet valve and the secondary barrel form a secondary compression cavity, and a runner hole is formed in the piston rod. The liquid discharging piece comprises a liquid discharging pipe and a liquid discharging valve, one end of the liquid discharging pipe communicates with the second-stage compression cavity, and the other end of the liquid discharging pipe is located outside the pump body; the device has the effect of conveniently solving the problem that impurities cannot be cleaned.

The invention discloses a compressor (1) comprising at least a gas leak recirculation duct (R1) connected between the packing (9) and the aspiration of the compressor (17), preferably several ducts (R2, R3, R4) recirculation the leaks from the several compartments (81, 82, 83) of the compressor (1) towards the aspiration (17) of the compressor (1). Thus, possible gas leaks in the compressor (1) are sent to the admission. Further, this compressor (1) comprises a crankcase (7) lubrication system through which an ionic liquid (LI) flows instead of oil (A), and the crankcase (7) is maintained pressurized, that is, essentially airtight.

The utility model discloses an M-shaped oil-free multi-stage supercharging piston type compressor, which comprises two first-stage compression devices, a second-stage compression device and a third-stage compression device, the air output ends of the two first-stage compression devices are connected with a trunk, the output end of the trunk is connected with a first-stage cooler, the output end of the trunk is connected with a second-stage cooler, and the output end of the second-stage cooler is connected with a third-stage cooler. The first-stage cooler is connected with a first-stage gas-liquid separator, the gas outlet end of the first-stage gas-liquid separator is connected with a first guide pipe, the first guide pipe is connected with the gas inlet end of the second-stage compression device, and the gas outlet end of the second-stage compression device is connected with the gas inlet end of the third-stage compression device. By arranging the two first-stage compression devices, the compressed air amount can be effectively increased, and the problems that in the prior art, the compressed air amount is increased by increasing the first-stage compression devices, so that the size of the whole machine is large, and inertia force balancing is not facilitated are solved. Meanwhile, the two first-stage compression devices are matched with the second-stage compression device and the third-stage compression device, so that the inertia force of each stage of compression device is convenient to balance.

The invention provides a double-cylinder air compressor, and belongs to the technical field of air compressors. The technical problem that an existing double-cylinder air compressor is large in noise is solved. The device comprises a crankcase, a driving motor is fixedly connected to the crankcase, the driving motor comprises a motor shaft, one end of the motor shaft extends into the crankcase, air cylinders are fixedly arranged on the two sides, perpendicular to the driving motor, of the crankcase respectively, and two connecting rods are fixedly connected to the motor shaft in a rotating mode. The ends, away from the motor shaft, of the two connecting rods are fixedly connected with pistons respectively, the two pistons are located in air cylinders respectively, the air cylinders are communicated with corresponding air outlet holes, the crankcase is communicated with an air inlet hole, and the air inlet hole can be communicated with the two air cylinders at the same time. The noise reduction device has a better noise reduction function.

The invention relates to the field of air compressors, in particular to a vehicle-mounted two-stage compression air compressor structure. The air compressor comprises an air compressor body, a motor, an oil groove and two lubricating mechanisms. The air compressor body comprises a shell, a cylinder arranged at the top of the shell and provided with two sliding ways distributed side by side, two piston barrels arranged in the two sliding ways in a sliding mode respectively, mounting shafts arranged in the piston barrels, a crankshaft rotationally arranged on the shell and a piston rod with the two ends rotationally connected with the crankshaft and the mounting shafts respectively. The motor is arranged on one transverse side of the air compressor body. An output shaft is connected with the crankshaft through a coupler. The oil groove is formed in the shell; the lubricating mechanism comprises an oil spraying pipe arranged on the piston barrel, an oil conveying pipe communicated with the oil spraying pipe, an oil bailing piece used for bailing oil from the oil groove and a linkage assembly in transmission connection with the piston rod and the oil bailing piece, and a plurality of liquid spraying holes are evenly distributed in the periphery of the piston barrel. Lubricating oil can be evenly sprayed to the inner wall of the cylinder body channel for lubrication, and the self-lubricating effect is good.

A method for determining a piston position of a piston in a hydraulic cylinder drive includes (i) providing a dynamic model of the cylinder drive, (ii) controlling driving of the cylinder drive with a control signal, (iii) detecting a real piston position of the piston, and (iv) adjusting parameters of the model on the basis of the real piston position. The model maps components of the cylinder drive and outputs a calculated piston position of the piston on the basis of detected operating parameters of the cylinder drive. A method of operating an arrangement having a corresponding hydraulic cylinder drive and a mechanism for implementing the methods are also disclosed herein.

The utility model relates to a shell assembly, a gas compression and supply device, an air suspension system and a vehicle, the shell assembly is used for the gas compression device and comprises a shell and a first flow channel, the shell is provided with a containing cavity used for containing a piston mechanism, and the containing cavity is divided into a first-stage compression cavity and a first air inlet cavity through the piston mechanism; the first flow channel is communicated with the first-stage compression chamber and the first air inlet chamber, at least part of the first flow channel is formed in the shell and used for allowing air to enter the first-stage compression chamber from the first air inlet chamber, so that the structure of the piston mechanism can be simplified, mounting and manufacturing of the piston mechanism are more convenient, the production difficulty is reduced, and the production efficiency is improved. And meanwhile, more stable reciprocating motion of the piston is facilitated.

One or more techniques and / or systems are disclosed for a mechanical assembly comprising a connecting rod with a first end and a second end, a crankshaft journal, a wrist pin, and at least one guide spacer. The crankshaft journal may be coupled to the first end of the connecting rod, allowing for the transmission of rotational forces. The wrist pin may be configured to attach to the second end of the connecting rod, facilitating the transfer of mechanical motion. At least one guide spacer may be positioned on the wrist pin, located on either side of the connecting rod at the second end, to provide alignment and reduce wear. The crankshaft journal and the wrist pin may be arranged in parallel, enabling the connecting rod to perform both rotational and reciprocating motions.

The utility model provides gas compression equipment, an air suspension and a vehicle. The gas compression apparatus includes a cylinder and a piston member. The air cylinder comprises a cylinder body and an end cover. The end cover is connected to one end, in the first direction, of the cylinder body and defines a first cavity with the cylinder body. An air outlet is formed in the other end of the cylinder body in the first direction. A first air inlet channel is formed in the end cover. The piston piece is movably connected to the first cavity in the first direction. A first compression chamber and a second compression chamber are defined by the piston piece and the air cylinder. The first compression chamber communicates with the outside of the air cylinder through the first air inlet channel. The second compression chamber is communicated with the air outlet. A ventilation channel is formed in the piston piece. The air duct communicates with the first compression chamber and the second compression chamber. The structure of the piston piece is simplified, and therefore the machining difficulty of the piston piece can be reduced.