496results about "Multi-stage pumps" patented technology

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 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 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 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.

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.

A blow-by plate according to at least one embodiment of the present disclosure can be attached to a housing facing a recess provided in the housing of a reciprocating compressor as a part of a pressure equalizing flow path to form the pressure equalizing flow path for returning blow-by gas of the reciprocating compressor to an intake side. A blow-by plate according to at least one embodiment of the present disclosure is provided with: one or more openings provided at positions facing a recess; and a mesh part which is provided in the opening part and through which blow-by gas can pass.

The utility model discloses a four-cylinder air compressor with simple assembly operation and stable structure, which comprises a motor assembly and a cylinder assembly, the motor assembly comprises a motor base, a motor and a motor upper cover, the motor is arranged between the motor base and the motor upper cover, the cylinder assembly comprises a positive pressure air cavity, a negative pressure air cavity and a cylinder mounting plate, the positive pressure air cavity is arranged at the top of the negative pressure air cavity, an air cylinder installation plate is arranged at the bottom of the negative pressure air cavity, a screw penetrates through the positive pressure air cavity and the negative pressure air cavity to be connected with the air cylinder installation plate in a screwed mode, and a plurality of protruding installation portions are arranged on the edges of the air cylinder installation plate, the motor base and the motor upper cover. And a screw rod penetrates through the cylinder mounting plate, the motor upper cover and the mounting part of the motor base to be fixedly mounted.

A capacity control valve with which a valve element can be smoothly controlled and the valve element can be stably held at a maximum stroke position is provided. In a capacity control valve V, a position of a valve element 51 is changed by drawing a movable iron core 84 to a fixed iron core 82 with magnetic force by energization of an electromagnetic coil 86. The iron core 82 on one side includes a projected portion 90 on the radially outer side, the iron core 84 on the other side includes a projected portion 92 on the radially inner side, and these projected portions are capable of being loosely fitted to each other when the movable iron core 84 is drawn to the fixed iron core 82. The projected portion 90 is formed to be smaller than an opposing surface 93 of the iron core 84 facing an effective magnetic force surface 90a of a distal end of the projected portion and formed in a tapered shape.

There is provided a valve capable of controlling a fluid with high accuracy. A valve includes: a valve housing 10 having a primary pressure space S1 and a secondary pressure space S2; a valve seat 40a disposed between the primary pressure space S1 and the secondary pressure space S2; a valve body 56 that is driven in an axial direction by a driving source 80 to be seated on or separate from the valve seat 40a; and a communication passage 15 that provides communication between a back space S3 adjacent to one of the primary pressure space S1 and the secondary pressure space S2 and remaining one of the primary pressure space S1 and the secondary pressure space S2. A partition member 30 that is expandable and contractible in the axial direction is disposed between the valve housing 10 and the valve body 56, and the back space S3 and the one of the primary pressure space S1 and the secondary pressure space S2 are partitioned off from each other in a sealed state by the partition member 30.

The present application provides a capacity control valve with high control accuracy and excellent energy efficiency in normal control. The capacity control valve (V) has a valve housing (10) formed with a discharge port (12) through which a discharge fluid of a discharge pressure (Pd) passes, a suction port (13) through which a suction fluid of a suction pressure (Ps) passes, and a control port (13) through which a control fluid of a control pressure (Pc) passes; a rod (83) driven by a solenoid (80); and a main valve (50) composed of a main valve seat (10a) and a main valve core (51), the communication between the discharge port (12) and the control port (14) being opened and closed by the movement of the rod (83), the capacity control valve being provided with a CS valve (56) between the control port (13) and the suction port (14), the CS valve (56) being controlled by the dynamic pressure of the fluid flowing from the discharge port (12) to the control port (13) through the opening of the main valve (50).

The invention relates to a method for compressing and providing a gas, in particular hydrogen, in which the obtained gas (a) is compressed by means of a compression device (140) having one or more compressor stages and the compressed gas (b) is supplied to a storage and / or pressure regulation system (120), and in which the compressed gas (b) is supplied to the storage and / or pressure regulation system (120). The gas (d) provided by the storage and / or pressure regulation system (120) is supplied to a supply device (130) for further use, in particular for delivery to a vehicle, the gas following one or at least one of the plurality of compressor stages and the compression device are cooled by means of a refrigerator (15) via a coolant circuit (e, f, g, h), and wherein the coolant circuit (e, f, g, h) is connected to the supply device (130). The provision device (130) is further cooled by a refrigerator (15).

This invention provides a pump body assembly, a compressor, and a refrigerator. The pump body assembly includes a cylinder seat, a splitter, a crankshaft, and a first piston and a second piston. The cylinder seat has at least one first cylinder and one second cylinder, which are horizontally aligned on the same side and their centerlines are parallel. The crankshaft is housed in the cylinder seat. The splitter includes a first support rod and a second support rod. The connecting end of the first support rod is connected to the first piston, which is slidably disposed in the first cylinder. The connecting end of the second support rod is connected to the second piston, which is slidably disposed in the second cylinder. The splitter of this invention, including the first and second support rods, allows for the arrangement of two compression assemblies within a limited space while ensuring a certain degree of flexibility for both the first and second support rods. The splitter transmits the rotational motion of the crankshaft to the first and second support rods, simplifying assembly.

Provided is a valve capable of reducing valve leakage.　The valve comprises: a valve housing 10 in which are formed ports 11, 12 through which a fluid passes; a valve body 51 driven by a driving source 80; a valve seat 40a on which a contact section 51a of the valve body 51 is seated; and biasing means 16, 17 which bias the valve body 51 in the valve-closing direction, wherein the valve seat 40a is formed of an elastic member 40.

The invention discloses a pickling machine with high and low pressure functions, and relates to the technical field of household appliances, the pickling machine is provided with a high and low pressure pressing device composed of a moving device, a pressing rod, a pressing body, a pressing shell and a valve, the valve comprises a pressure suction valve and a pressure increasing valve, the pickling machine is provided with a pressure-resistant shell, and the pressure-resistant shell is provided with a pressure sensor. The pressure-resistant shell is provided with a built-in groove, a sealing device and a pressure-resistant built-in door, and the high-pressure space chamber or the low-pressure space chamber of the pickling machine is integrally connected with the high-pressure and low-pressure pressing device through a high-pressure and low-pressure control valve by a pipeline or is integrally connected with the high-pressure and low-pressure pressing device. And a pressure suction valve or a pressurizing valve of the high-low pressure pressurizing device is connected with a pipeline through a high-low pressure control valve. The space chamber of the pressure-resistant shell of the pickling machine is made into a low-air-pressure space chamber lower than the atmospheric environment air pressure or a high-air-pressure space chamber higher than the atmospheric environment air pressure.

The present invention provides a valve capable of closing with a small driving force. The valve (V1) includes: a valve body (10) having a primary pressure port (41a) and a secondary pressure port (11); a valve core (51) driven by a solenoid (80); a valve seat for the valve core (51) to sit on; and a spring (85) that applies force to the valve core (51) in the opening direction, wherein the valve seat includes: a first valve seat (10a); and a second valve seat (40a) disposed on the inner diameter side of the first valve seat (10a) and moved toward the valve core (51) by the pressure difference between the primary pressure and the secondary pressure.

Provided compressor control module, CCM, adapted to control an output of a variable displacement swash plate compressor, it is an object of the present invention to improve the efficiency of the compressor. The object is solved by: either directly calculate, or receive from an external source, for example the HVAC control unit, a signal indicating the desired or required output from the variable displacement swash plate compressor (30), also referred to as control target or set value, for example, but not limited to, a suction pressure, a piston stroke length, an evaporator outlet air temperature, a refrigerant mass flow and / or a work done on fluid; receive the current / actual value of the value; receive or calculate the current rotation speed and angle, with respect to the rotation axis, of the swash plate, or the current piston stroke length and its reciprocating frequency, respectively, (48) of the variable displacement swash plate compressor; receive or calculate optionally additional current values of the compressor, the air conditioning system or from the vehicle, like the discharge pressure, the crank case pressure, the delta pressure between suction pressure and crank case pressure, the evaporator outlet air temperature, the engine speed, but not limited to; determine the difference between the desired or required output from the variable displacement swash plate compressor and the current output of the variable displacement swash plate compressor; and output a signal to the valve driving unit which will adjust the angle of the swash plate (48) such that the actual output of the variable displacement swash plate compressor becomes closer to, or the same as, the desired or required output as obtained in step a), also taking into account the additional values received or calculated in c) and d).

The invention provides a low-power high-speed compressor head, and belongs to the technical field of piston type compressors. Comprising a machine box and a crank connecting rod mechanism, the crank connecting rod mechanism is installed in the machine box, connecting arms are fixedly installed on the end walls of the two sides of the machine box, guide connecting grooves are formed in the inner walls of the four sets of connecting arms, and connecting rods are slidably connected to the inner walls of the guide connecting grooves. Three types of special compression modules, namely the first compression part, the second compression part and the combined compression part, are arranged, the first compression part is adaptive to pressurization of medium-low pressure pure gas such as natural gas, the second compression part is adaptive to pressurization of multi-source inlet gas such as ammonia gas, and the combined compression part is adaptive to pressurization of ultrahigh pressure gas such as carbon dioxide and hydrogen; and meanwhile, the multi-element medium pressurizing requirement under the space-limited environments such as vehicle-mounted and skid-mounted environments can be met, and application scenes can be switched without replacing the whole machine.

A gas compressor includes a main body portion including a compression unit configured to compress gas, an air blowing unit, and a drive unit configured to drive the compression unit and the air blowing unit, a cover portion covering at least a part of the main body portion and having an air vent through which air flows from the air blowing unit, and a handle portion having a gripping portion. The air vent faces a rotation axis direction of a rotation member of the air blowing unit which is rotated by being driven by the drive unit, and the handle portion includes a protective portion facing the air vent and being apart from the air vent.

A connector (16) for use in a vacuum pump system (2), the connector (16) comprising: a conduit (50), the conduit (50) comprising a first conduit portion (51) having a first opening (61) and a second opening (62); a second conduit portion (52) extending from the first conduit portion (51) at a branch point (54) between the first opening (61) and the second opening (62), the second conduit portion (52) having a third opening (63) at an end distal to the branch point (54); a first valve (71) disposed along the first conduit portion (51) between the branch point (54) and the second opening (62); and a second valve (72) disposed along the second conduit portion (52) between the branch point (54) and the third opening (63).

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.