49results about "Multi-stage pumps" patented technology

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 application discloses a pipeline structure for multistage compressor series connection, which comprises a first pipe body and a second pipe body connected with each other, a first cavity, a second cavity and a third cavity are sequentially arranged in the first pipe body along the length direction, the cross-sectional dimension of the second cavity is smaller than that of the third cavity; a fourth cavity and a fifth cavity are sequentially arranged in the second pipe body along the length direction, the cross-sectional dimension of the fourth cavity is smaller than that of the third cavity; a valve body is slidably arranged in the third cavity, the length of the valve body is smaller than the depth of the third cavity, and a flow channel communicating with the third cavity and the fourth cavity is arranged in the valve body. The application can automatically increase the pressure of the gas when the pressure of the gas is small, and can automatically make part of the gas directly jump over the pressure increasing stage when the pressure of the gas is large, which is beneficial to optimizing the load distribution and effectively improving the pressure increasing efficiency and the cycle transfer efficiency of the multistage compressor.

A fluid end assembly comprising a plurality of fluid end sections positioned in a side-by-side relationship. Each fluid end section comprises a housing having a bore formed therein for housing a reciprocating plunger. Fluid is prevented from leaking around the plunger by a packing seal assembly. The packing seal assembly comprises one and only one packing seal.

A small gas compressor based on the kinetic energy of a reciprocating push-pull rod of an electric cylinder is disclosed. The electric cylinder's push-pull rod connector is fixedly connected to one end of a square tube, which is located in a square perforation in the middle of a six-cylinder unit. A forward Y-shaped plate and a reverse Y-shaped plate are respectively provided at both ends of the square tube. A first forward compression cylinder is connected to the intake pipe via a one-way valve, and a third reverse compression cylinder is connected to the exhaust pipe via a one-way valve. The remaining adjacent forward and reverse compression cylinders, or vice versa, are connected by connecting pipes, each equipped with a one-way valve. The outer ends of the forward Y-shaped plates are connected to the outer ends of the piston rods of the three forward compression cylinders, and the three extension plates of the reverse Y-shaped plates are connected to the outer ends of the piston rods of the three reverse compression cylinders. Multiple connecting plates are provided between the six-cylinder unit and the electric cylinder. This invention utilizes the kinetic energy of the electric cylinder's reciprocating push-pull rod to push and pull the square tube, thereby obtaining the gas compression work performed by the pistons driven by the two Y-shaped plates.

A reciprocating compressor (1', 1", 1‴, 1"") comprising: a suction valve (110', 110", 110‴, 110A, 110B); a discharge valve (120', 120", 120‴, 120A); and a working chamber (251', 251", 251‴, 251A, 251B); wherein the suction valve (110', 110", 110‴, 110A, 110B ) is configured to provide fluid communication between a suction channel (40', 40", 40"', 40A, 40B) and the working chamber (251', 251", 251‴, 251A, 251B) and the discharge valve (120', 120", 120‴, 120A) is configured to provide fluid communication between the working chamber (251', 251", 251‴, 251A, 251B) and a discharge channel (50', 50", 50‴, 50A, 50B); characterized in that the suction valve (110', 110", 110‴, 110A, 110B ) comprises at least one non-self-actuated valve and the discharge valve (120', 120", 120‴, 120A) comprises at least one self-actuated check valve. The at least one non-self-actuated valve is actively driven such that the non-self-actuated valve does not open or close in response to fluid pressure in the compressor

Pumping apparatus (3) comprising a first fluid machine (3A) and a second fluid machine (3B), each comprising a piston (4) and a guide (5) defining a first chamber (61) for compressing and expanding a fluid, the piston (4) and the guide (5) being movable relative to each other for compressing and expanding the fluid in the first chamber (61), the first fluid machine (3A) and the second fluid machine (3B) each also comprising a sealing device (7) disposed between the piston (4) and the guide (5), characterized in that it comprises a collection element (8) configured to collect at least a portion of the leaks that have migrated through the sealing device (7) of one of the machines (3A, 3B) and to direct these collected leaks into the first chamber (61) of the other fluid machine (3A, 3B). Abbreviated figure: Fig. 1

The present application relates to the technical field of heat pump, especially to a thermoacoustic heat pump system, which comprises a compression device, an ejector, a first heat exchanger, a regenerator and a second heat exchanger. The ejector moves in response to the acoustic power and pressure fluctuation generated by the compression device, and a first cavity is formed on the inner side of the ejector, and a second cavity is formed between the outer side of the ejector and the compression device; the regenerator is connected with the first heat exchanger, used for converting acoustic power into heat pumping capacity, and a third cavity is arranged on the inner side of the regenerator, which is communicated with the first heat exchanger and the first cavity respectively; the second heat exchanger is connected with the regenerator and the second cavity. Wherein, the first heat exchanger is arranged away from the compression device compared with the second heat exchanger. The present application provides a thermoacoustic heat pump system, which changes the energy flow path by setting the third cavity, exchanges the positions of the first heat exchanger and the second heat exchanger, keeps the high-temperature side away from the compression device, ensures the heat pump efficiency and operation stability, and prolongs the service life.

A variable displacement hydraulic device comprising: a housing having an inlet for receiving hydraulic fluid and an outlet for outputting the hydraulic fluid, the housing having a reciprocation axis; a first cylinder positioned in the housing along the reciprocation axis, the first cylinder having a first input for receiving the hydraulic fluid on a first intake stroke and a first output for ejecting the hydraulic fluid on a first exhaust stroke; a first piston positioned for a first reciprocal motion within the first cylinder, the first piston having a first main end exposed to the hydraulic fluid and a second main end coupled to an actuator, the actuator for driving the second main end when coupled to the actuator for causing the first reciprocal motion to induce a first portion of said outputting of the hydraulic fluid; a second cylinder positioned in the first piston along the reciprocation axis, the second cylinder having a second input for receiving the hydraulic fluid on a second intake stroke and a second output for ejecting the hydraulic fluid on a second exhaust stroke; a second piston positioned for a second reciprocal motion within the second cylinder, the second piston having a first secondary end exposed to the hydraulic fluid and a second secondary end coupled to the actuator, the actuator for driving the second secondary end when coupled to the actuator for causing the second reciprocal motion to induce a second portion of said outputting of the hydraulic fluid; and a locking mechanism for inhibiting the first reciprocal motion of the first piston; wherein when engaged the locking mechanism inhibits the first portion of said outputting of the hydraulic fluid by decoupling the first piston from the actuator while continued operation of the actuator provides the second portion of said outputting of the hydraulic fluid by the second piston.

This utility model relates to the field of compressor technology, and in particular to an oil return structure for an aluminum swashplate type large displacement compressor, comprising: a compression working assembly including a rotating shaft with an oil outlet channel along its length, and multiple oil outlet holes on its outer wall communicating with the oil outlet channel; a cylinder body with a working chamber in the middle, fitted onto the compression working assembly, with the rotating shaft passing through the cylinder body; an oil storage pool on one side of the cylinder body; and end caps, one on each of the two end faces of the cylinder body; wherein the cylinder body is divided into a first oil return section and a second oil return section; the first oil return section has a first oil return hole channel communicating from the joint surface between the first oil return section and the end cap to the working chamber; the second oil return section has a second oil return hole channel communicating from the joint surface between the second oil return section and the end cap to the oil storage pool. This utility model effectively improves the oil circulation effect within the compressor, enhances the lubrication effect, and improves the oil return function.

This utility model relates to the field of hydraulic compressor technology, and more particularly to a cylinder clearance adjustment device for a two-stage hydraulic compressor. It includes a hydraulic cylinder, with a primary cylinder and a secondary cylinder connected to its two sides via semi-conduits. An oil piston is installed inside the hydraulic cylinder, with piston rods connected to its two sides. A primary air piston is installed inside the primary cylinder, connected to its piston rod. A secondary air piston is installed inside the secondary cylinder, connected to its piston rod. A clamping device is installed on the end face of the primary cylinder near the oil cylinder piston rod, and a pushing device is installed between the secondary cylinder piston rod and the oil cylinder piston rod. By measuring the distance between the primary cylinder piston rod and the oil cylinder piston rod with a feeler gauge, and adding a shim of appropriate thickness between them, the required clearance value for the primary cylinder can be met, thus achieving precise measurement and adjustment of the cylinder clearance of the two-stage hydraulic compressor.

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 application provides a gas pump, and relates to the field of mechanical engineering.The gas pump comprises a pump body, an exhaust assembly and a driving assembly, the pump body is provided with a crankshaft, a connecting rod, a piston, a cylinder, a valve group, a sealing gasket, a coupling piece, an axle bracket and a bearing, the crankshaft is provided with a half shaft, a shaft pin A and a shaft pin B, the piston is provided with a piston body and a piston ring, the driving assembly is provided with a motor, a frame and a shaft coupling piece, the exhaust assembly and the driving assembly are arranged at both ends of the pump body, the cylinder ring is arranged on the axle bracket, the motor drives the crankshaft, the connecting rod, the piston and the valve group to pump gas in linkage through the shaft coupling piece, the gas is collected and pumped out through the exhaust assembly, the pump body is connected in multiple stages through the shaft pin B and the sealing gasket, and the demand of different pumping flow is met.

A compressor unit includes a first spillback unit that returns hydrogen gas discharged from an early compression stage to a suction flow path, an adjustment means that adjusts the processing amount of the hydrogen gas processed by a subsequent compression stage, a pressure sensor, an upstream side pressure sensor, and a controller. The controller can execute a first control and a second control, the first control being of controlling the adjustment means so as to adjust the processing amount in the subsequent compression stage based on the pressure acquired by the upstream side pressure sensor, and the second control being of controlling the first spillback valve so as to bring the intermediate pressure acquired by the pressure sensor within a predetermined pressure range.

The present invention relates to a radial piston compressor comprising a drive unit (1) and a compressor unit (2), wherein the compressor unit (2) comprises a drive shaft (21) with an eccentric (22), wherein at least one, preferably several, piston-working chamber combinations (23-23 ‴ʺʺ) extend radially from the drive shaft (21), wherein each piston-working chamber combination comprises a working chamber (231) and a piston (232) displaceable in the working chamber, wherein certain preferable combinations of number of pistons (V), number of pole pairs (3) of the electric motor and number (V) including the dimensions (M) of the screw connections (4) are selected, which are expected to improve the acoustic behavior of the overall system, and / or the excitation events per revolution from the various excitation components are different.

Pumping apparatus (3) comprising a first fluid machine (3A) and a second fluid machine (3B) each comprising a piston (4) and a guide (5) delimiting a first chamber (61) for compression and expansion of a fluid, the piston (4) and the guide (5) being movable relative to each other for the compression and expansion of the fluid in the first chamber (61), the first fluid machine (3A) and the second fluid machine (3B) each also comprising a sealing device (7) disposed between the piston (4) and the guide (5), characterized in that it comprises a collection element (8) configured to collect at least a part of the leaks which have migrated through the sealing device (7) of one of the machines (3A, 3B) and to direct these collected leaks into the first chamber (61) of the other of the fluid machines (3A, 3B).

The application provides a high-pressure gas pump, and belongs to the technical field of gas compression devices. The high-pressure gas pump comprises a cylinder body, a first-stage piston is slidably arranged in the cylinder body, the axial middle part of the first-stage piston is hinged to a driving part through a piston pin, the first-stage piston divides the space in the cylinder body into a first-stage cylinder and a second-stage cylinder, and the end of the first-stage cylinder away from the second-stage cylinder is provided with a third-stage cylinder. During operation, the first-stage cylinder acts, synchronously drives the second-stage cylinder and the third-stage cylinder at the two ends of the first-stage cylinder to act synchronously, and the first-stage cylinder is balanced under the combined action of the second-stage cylinder and the third-stage cylinder at the two ends. The first-stage cylinder and the second-stage cylinder are unidirectionally communicated, the second-stage cylinder and the third-stage cylinder are unidirectionally communicated, and after external gas enters the cylinder body from the first-stage cylinder, the external gas is sequentially compressed and pressurized by the second-stage cylinder and the third-stage cylinder and then discharged. The first-stage piston in the high-pressure gas pump is balanced under force, is not prone to wear and tear, and facilitates independent heat dissipation of all the cylinders, and the use performance is improved.

The utility model discloses a vertical nitrogen compressor of stepless regulation, this compressor adopts vertical two column two stage structure, including fuselage, movement mechanism, compression system, auxiliary system and stepless air volume regulating system, fuselage adopts integral casting structure, and the inside integrated main bearing seat is to, and movement mechanism drives connecting rod and crosshead linkage piston rod through crank, and compression system is composed of independent casting first stage cylinder and second stage cylinder, and is equipped with stainless steel cylinder sleeve and water cooling structure, and auxiliary system contains seal ware, buffer set and cooler set. The system is compatible with DCS / PLC digitization control, and completes air volume regulation in three piston reciprocating periods, and significantly improves energy efficiency ratio and operation flexibility.

The utility model relates to the technical field of compressor discloses eight cylinder piston compressor, including the casing, the top fixedly connected with upper bearing mounting plate of casing, the bottom fixedly connected with lower bearing mounting plate of casing, the middle part rotationally connected with eccentricity main shaft of lower bearing mounting plate, the outer wall of eccentricity main shaft is provided with double cam symmetry, double cam includes two eccentric cylinders and hollow section set up on two eccentric cylinders, the eccentricity between the axis of two eccentric cylinders and the axis of hollow section is same with eccentricity of eccentricity main shaft, the outer wall of guide rod is provided with guide rod linear bearing. In the utility model, through setting up upper bearing mounting plate and lower bearing mounting plate in the casing top and bottom respectively, the both end support of eccentricity main shaft is formed, and the eccentric motion of eccentricity main shaft and eccentric wheel with the same eccentricity is complementary, and the fixed end and the support end are coaxial when ensuring eccentricity main shaft rotation.

A compressible fluid separator pump (106) includes a crankshaft (118), four cylinders (114A-114D), and four pistons (116A-116D). Each cylinder includes an inlet (130A-130D) including an inlet valve (136A-136D) for mixed fluid comprising a target component and a discharge component, a reject outlet (134A-134D) including a reject valve for a reject fluid, and a select outlet (132A-132D) for a select fluid, wherein each of the select outlets includes a separator member (140A-140D) that prefers the target component over the discharge component such that the target component is at a higher concentration in the select fluid than in the mixed fluid and in the reject fluid. Each piston (116A-116D) is connected to the crankshaft (118) and is positioned in one of the four cylinders (114A-114D), and the crankshaft (118) is configured to position two of the pistons at top dead center when the other two of the pistons are at bottom dead center. Alternatively, a compressible fluid separator pump (306) is disclosed having a Wankel-type configuration, the cavity (344) of the pump having an inlet (330), a reject outlet (334) and a select outlet (332). Alternatively, the pump can include eight cylinders. According to another configuration, the compressible fluid separator pump may be of the Wankel-type.

A piston compressor comprises a crankcase (11), a crankshaft (12) arranged therein, connecting rods (13), a crosshead (14) with an arranged piston rod (15), to which at least one piston (16) is fastened, which is guided in a dry-running manner in a cylinder (17). Furthermore, valves (18) and at least one piston rod sealing device (19) are provided, which is arranged around the piston rod (15) between the cylinder (17) and the crankcase (11). The piston rod sealing device (19) comprises a stuffing box device (22) which is arranged in a stuffing box housing (21) which is introduced into a piston compressor housing (20). The stuffing box device (22) has a stuffing box (23) and a stuffing box jacket (24) into which the stuffing box is inserted. The stuffing box (23) and the piston rod (15) define a µm-narrow sealing gap (25) which is open over the common length section and allows a gap leakage flow (26) of the compressed medium.The stuffing box (23) and the stuffing box casing (24) each consist of different materials, the resulting thermal expansion coefficient of which essentially corresponds to the thermal expansion coefficient of the material of the piston rod (15).

A piston compressor (38) comprises a drive piston (3) guided along a cylinder axis (36) in a drive cylinder (24) and a compressor piston (2) guided along the cylinder axis (36) in a compressor cylinder (1) coaxial with the compressor cylinder (1). The first inner diameter of the drive cylinder (24) is at least twice the size of the second inner diameter of the compressor cylinder (1), and the compressor piston (2) is supported on the drive piston (3) by a piston rod (37). For this purpose, a drive piston flange (41) is formed on one end face of the drive piston (3), and a piston rod flange (42) is formed on the opposite end face of the piston rod (37).Within the drive piston flange (41), a recess (43) is formed in the end face of the drive piston (3), into which a projection of the piston rod (37) extends beyond the piston rod flange (42). The drive piston flange (41) and the piston rod flange (42) are enclosed by an elastic clamp (17) and are pressed against each other along the cylinder axis (36). A support surface (44) extends across the bottom of the recess (43), oriented transversely to the cylinder axis (36). The projection extends into the recess (43) with radial clearance (35) and rests against the support surface (44) with a convex counter-surface (45). The drive piston flange (41) and the piston rod flange (42) are positioned opposite each other along the cylinder axis (36) at a free distance (34).This allows both translational relative movements between the flanges (41, 42) running transversely to the cylinder axis (36) and rotational relative movements around the contact area between the support surface (44) and the counter surface (45).

The invention relates to a multi-stage reciprocating compressor (10) for a pneumatic vehicle system (30), the multi-stage reciprocating compressor (10) comprising a crankcase (11), a plurality of compression cylinders (12a, 12b) radially arranged in the crankcase (11), wherein at least two compression cylinders (12a) of the plurality of compression cylinders (12a, 12b) form first stage compression cylinders (12a) configured to operate in a first compression stage and wherein a further compression cylinder (12b) of the plurality of compression cylinders (12a, 12b) forms a second stage compression cylinder (12b) configured to operate in a second compression stage, and a crankshaft (13) supported by the crankcase (11) and connected to pistons (15a, 15b) configured to reciprocate in the compression cylinders (12a, 12b) by rotation of the crankshaft (13), wherein the crankshaft (13) is connected to the pistons (15a, 15b) via a con rod assembly (16), the con rod assembly (16) comprising a main rod (17) extending between the crankshaft (13) and the piston (15b) reciprocating in the second stage compression cylinder (12b), and connecting rods (18) being connected to the main rod (17) in a movable manner and extending between the main rod (17) and the pistons (15a) reciprocating in the first stage compression cylinders (12a). Furthermore, the invention relates to a pneumatic vehicle system (30) and a vehicle (50).

This utility model relates to the field of circulating liquid seal compressor technology, and in particular to a differential circulating liquid seal cylinder with a balance chamber. A low-pressure circulating chamber is provided on the outer surface of the low-pressure piston, forming a low-pressure chamber within the cylinder body between the low-pressure piston end face and the cylinder base. A high-pressure circulating chamber is provided on the outer surface of the high-pressure piston, forming a high-pressure chamber between the cylinder body and the outer surface of the piston rod between the high-pressure piston end face and the cylinder head. A balance chamber is formed between the cylinder body and the outer surface of the connecting rod between the low-pressure and high-pressure pistons. The cylinder body sidewall has a balance inlet and a balance outlet connected to the balance chamber. The gas is first pressurized in the low-pressure chamber, and then the pressurized gas enters the high-pressure chamber for secondary pressurization via a pipeline. This differential pressurization of the compressed gas greatly improves compression efficiency. The gas pressure in the balance chamber balances the piston force generated in the low-pressure or high-pressure chamber, ensuring stable piston operation and guaranteeing the overall lifespan of the cylinder.

A reciprocating compressor according to the present invention comprises a crankshaft, a base part that accommodates the crankshaft, a bearing part that rotatably supports the crankshaft, and a bearing holding part that has an upper section and a lower section and holds the bearing part between the upper section and the lower section. The base part comprises a first side part that extends along the longitudinal direction of the crankshaft, a second side part that is on the opposite side from the first side part with the crankshaft therebetween and extends along the longitudinal direction, a first rib part that is provided to the inside of the first side part, and a second rib part that is provided to the inside of the second side part. The lower section of the bearing holding part, the first rib part, and the second rib part are formed from a single continuous member.

A compressor of one embodiment includes a cylinder (12), a piston (14) configured to be able to reciprocate in the cylinder (12), a suction space (Si) capable of communicating with a working chamber (Sc) formed by the cylinder (12) and the piston (14), a discharge space (Sv) capable of communicating with the working chamber (Sc), a partition wall portion (16) arranged so as to surround the working chamber (Sc) and dividing the suction space (Si) and the discharge space (Sv), and a cooling medium path (18) formed in the partition wall portion (16).

A double acting two stage piston type pump includes a pump housing having a piston arrangement connected to a driving shaft which, when driven, sets the piston arrangement into movement. The piston arrangement has at least two primary stage pistons, the primary stage pistons being slidably seated in respective primary stage cylinders formed in the pump housing. The piston arrangement also includes at least two secondary stage pistons slidably seated in respective secondary stage cylinders formed in the primary stage pistons. The primary stage pistons and the secondary stage pistons are mounted on, and directly driven by, eccentrics mounted on the driving shaft.