757results 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 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.

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 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 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 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.

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.

A positive displacement pump system can include a fluid end block, which can be configured to provide a pumping chamber and control a flow of a fluid through the positive displacement pump system. The fluid end block can include a first cylindrical wall defining a plunger bore extending partially through the fluid end block and a second cylindrical wall defining a fluid conveying cross bore that intersects the plunger bore defining a bore intersection rim. A portion of the first bore intersection rim can include a first toroidal surface.

A process for internally cooling an inline compressor involves the steps of providing a compression chamber between an outer cylinder and an intermediate cylinder and a drive chamber between the intermediate cylinder and a piston; admitting gas into the compression chamber; pumping drive fluid through the piston into the drive chamber to extend the intermediate cylinder and compress the compression chamber and the gas in the compression chamber; allowing heat from the compressed gas to transfer to the drive fluid; allowing the compressed gas to exit the compression chamber; allowing the withdrawal of the drive fluid from the drive chamber; passing the withdrawn drive fluid through a heat exchanger to cool the drive fluid for reuse in extending the intermediate cylinder.

A power end includes a monolithic core with a base having a surface configured to mount to a fluid end of the reciprocating pump and a plurality of extensions integral to the base. Each extension of the plurality of extensions includes a ring portion that defines an opening configured to receive a crankshaft of the reciprocating pump. The power end also includes a plurality of plates separate from the monolithic core. Each plate of the plurality of plates extends between a pair of adjacent of extensions of the plurality of extensions to enclose the monolithic core.

The utility model discloses a novel compressor main machine head structure which comprises a crankcase, a crankshaft disc, a connecting rod, a piston and a cylinder body. A plurality of cylinder bodies are evenly distributed on the outer circumferential face of the crankcase in the circumferential direction of the crankcase at intervals, and each cylinder body is arranged in the radial direction of the crankcase. The crankshaft disc is arranged in the crankcase and coaxially connected to the crankshaft in a sleeving mode. Connecting rods are further arranged on the outer circumferential face of the crankshaft disc in the radial direction corresponding to the positions of the cylinder bodies, one end of each connecting rod is hinged to the crankshaft disc in the circumferential direction of the crankshaft disc, a lining is further arranged at the hinged joint of the connecting rods and the crankshaft disc, and the abrasive resistance of the hinged joint is enhanced through the lining. The other end of each connecting rod is provided with a piston matched with the connecting rod, and the pistons are driven to move in the corresponding cylinder bodies in a reciprocating mode. The compressor is simple in structure, the multiple cylinder bodies are arranged at intervals in the circumferential direction, the transmission distance of the crankshaft can be effectively shortened, and therefore the size of the compressor is reduced, and the occupied area is reduced.

The invention discloses a shell, an air pump, an air suspension and a vehicle, the shell is used for the air pump, and the shell is provided with a center hole, five cylinder holes, five transmission air channels and an air outlet channel; one ends of the five cylinder holes communicate with the center hole, the five cylinder holes are formed in the circumferential direction of the center hole at intervals, and the cylinder holes are used for containing air cylinders; each conveying air channel is used for communicating two adjacent cylinder holes, the five conveying air channels are distributed in the circumferential direction of the center hole, and the five conveying air channels and the five cylinder holes jointly form an annular air channel which is communicated end to end; the air outlet channel is communicated with any transmission air channel and the external space. The air pump using the shell is high in inflating efficiency.

A compressor unit includes a first spillback valve, an adjusting means that adjusts a processing amount of hydrogen gas by a succeeding compression stage, an upstream side temperature sensor, and a controller. The controller refers to suction temperature acquired by the upstream side temperature sensor, and can execute a first control and a second control, the first control being of controlling the first spillback valve so that suction temperature falls within a predetermined temperature range, and the second control being of controlling the adjusting means so that a processing amount of the succeeding compression stage is adjusted according to a change amount in pressure in an intermediate flow path caused by the first control. The predetermined temperature range is set to a range higher than reference temperature based on liquefaction temperature of air and less than 0°C.

The invention discloses an anti-abrasion structure for a piston ring of a reciprocating gas compressor, belongs to the technical field of gas compressors, and aims to solve the technical problems that the piston ring of the existing reciprocating gas compressor is easy to abrade, uneven in lubrication, poor in air inlet filtering effect and insufficient in transmission stability. According to the technical scheme, the air compressor is characterized by comprising an air storage tank, a protective shell, a mounting sleeve, a sealing plate, a connector, a rotating circular plate, a driven shaft, a compression assembly, a driving assembly, an air inlet cylinder and a filtering assembly and further comprising an air inlet connector and a connecting pipe; an L-shaped plate and a piston plate are arranged on the side portion of the piston ring and matched with an oil groove and a permeation hole to achieve precise lubrication, the filtering assembly adopts a conical filtering net and a circular filtering cylinder to conduct double filtering and is convenient to disassemble, assemble and clean, the driving assembly is matched with a synchronizing wheel through a servo motor for transmission to guarantee stable operation, and compressed gas is fed into a gas storage tank through a gas inlet connector after being gathered through a connecting pipe.

The embodiment of the invention provides an oil-free compressor transmission device and a compressor, and relates to the field of compressors. Comprising a driving cavity, a compression cylinder, a piston, a connecting rod, a turntable, a connecting shaft, a driving groove and a sliding rod, the number of the compression cylinders is three, the compression cylinders are installed on the driving cavity in the circumferential direction at equal intervals, and the compression cylinders communicate with the driving cavity. The number of the rotary tables is two, and the rotary tables are rotationally installed in the driving cavity and are coaxial with the driving cavity. The central positions of the two rotating discs are connected through a connecting shaft; the opposite sides of the two rotating discs are provided with symmetrical driving grooves correspondingly. The number of the sliding rods is three, the two ends of the three sliding rods are slidably installed in the two driving grooves correspondingly, and the three sliding rods are arranged at equal intervals in the circumferential direction. The three connecting rods are arranged in the circumferential direction at equal intervals, and one ends of the three connecting rods are rotationally connected with the middle of the sliding rod. Continuous multi-cavity air compression can be achieved, adaptive operation is rapidly carried out, and switching according to actual conditions is facilitated.

An oil-free air compressor and a vehicle. The oil-free air compressor comprises a cylinder body. A first-stage compression cavity, a first-stage exhaust cavity, and a high-pressure cavity are provided in the cylinder body. The first-stage compression cavity and the first-stage exhaust cavity are coaxially arranged and are each parallel to the axis of the high-pressure cavity. The sum of the axial length of the first-stage compression cavity and the axial length of the first-stage exhaust cavity is less than the axial length of the high-pressure cavity. The compressor further comprises a first valve plate assembly. The first valve plate assembly is arranged between the first-stage compression cavity and the first-stage exhaust cavity. A first one-way valve body is arranged on the first valve plate assembly. The first one-way valve body is used for unidirectionally directing the first-stage compression cavity towards the first-stage exhaust cavity. Compared with the existing technology, in the present invention, the axial length of the first-stage compression cavity and the axial length of a low-pressure piston connecting rod assembly are shortened, such that the stroke of a low-pressure piston assembly in the first-stage compression cavity is shortened, thereby solving the technical problem of how to shorten the axial stroke of low-pressure piston assemblies in the existing technology.

The present application relates to the field of air compressor, specifically is common type cylinder head blank and air compressor. Common type cylinder head blank includes cover part and isolation part, cover part is provided with first exhaust port, second exhaust port, inner cavity and mounting surface for covering valve plate, inner cavity is separated by isolation part into first chamber, second chamber, third chamber, fourth chamber, fifth chamber, sixth chamber and seventh chamber, also has first variable shape part, second variable shape part and third partial isolation part is defined as third variable shape part. By configuring second exhaust port to communicate with third chamber, and by setting first variable shape part and third variable shape part in separated state from the rest of isolation part, common type cylinder head blank can be applied to primary compressor with two cylinder chambers, or, by setting second variable shape part in separated state from the rest of isolation part, common type cylinder head blank can be applied to secondary compressor with two cylinder chambers.

Provided is a valve that can be closed with a small driving force. A valve V1 includes: a valve housing 10 provided with a primary pressure port 41a and a secondary pressure port 11; a valve body 51 configured to be driven by a solenoid 80; a valve seat on which the valve body 51 is seated; and a spring 85 that urges the valve body 51 in a valve opening direction. The valve seat includes a first valve seat 10a and a second valve seat 40a disposed on a radially inner side of the first valve seat 10a. The second valve seat 40a is configured for moving in a direction toward the valve body 51 due to a differential pressure between a primary pressure and a secondary pressure.