872results about "Reciprocating piston engines" patented technology

A hydrostatic axial piston machine is disclosed, in the housing of which a drive shaft is rotatably mounted about an axis of rotation. The housing comprises a pot-like housing part having a first abutment and a cover-like housing part having a second abutment. The two abutments are clamped against one another in a sealing manner. A first fitting pin is inserted precisely into a first fitting recess of the first abutment on the one hand and into a second fitting recess of the second abutment on the other hand. A second fitting pin is provided on a side opposite the axis of rotation, which is inserted precisely into a third fitting recess of the first abutment on the one hand and into a fourth fitting recess of the second abutment on the other hand. The second fitting recess has a radial widening relative to the axis of rotation, whereby the second fitting recess is a slotted hole and / or a fitting groove.

The invention provides a hydraulic control pilot two-stage flow distribution static balance radial plunger hydraulic device and a working method, and relates to the technical field of radial plunger hydraulic devices. According to the scheme, the radial plunger hydraulic device is balanced through hydraulic control pilot two-stage flow distribution static force, flow distribution is controlled through external control pilot pressure, bidirectional rotation of a hydraulic pump motor and self-compensation after a valve plate is abraded are achieved by arranging an external control pilot oil way, and the service life is prolonged. In addition, by arranging the regular polygon driving type structure, regular polygon parts are additionally arranged between the crankshaft and the plunger, the transmission performance of the radial plunger pump is optimized, and friction force is reduced. By arranging the guide sleeve, the rubber cavity assembly and the return spring, the movement centering performance of the plunger can be effectively improved, leakage at the position of the plunger unit is reduced, and the complexity of the motor return device is simplified.

A closure element for a fluid end assembly that has two or more recessed grooves formed in its outer surface. The grooves are axially offset. A seal is placed in one and only one of the grooves. As wear occurs, the seal is relocated to one of the other grooves. Instead of a series of axially offset grooves in a single closure element, a kit may be formed from two or more otherwise identical closure elements, each with a single recessed groove at a different axial position. Another closure element has a series of ledge-like surfaces defining spaces within which a seal may be received. One outer surface surrounds one or more of the other surfaces. A seal is placed in one and only one of the spaces. As wear occurs, the seal is relocated to one of the other spaces.

The present invention discloses a ball plunger hydraulic motor comprising a housing, a stator fixedly mounted within the housing, a rotor rotatably mounted within the housing, a ball plunger structure mounted between the stator and the rotor, and a brake mounted within the housing for braking the rotor. Compared to the prior art, the present invention integrates the brake within the ball plunger hydraulic motor, eliminating the need for a brake in actual use. This significantly saves space and results in a more compact structure.

Disclosed are a swivel angle measuring device (44) and a hydrostatic axial piston machine (1) with a swashplate (26) whose swivel angle is adjustable by means of an actuating piston (38) guided in an actuating cylinder (34), and with a swivel angle measuring device (44) by means of which the swivel angle of the swashplate (26) can be detected. The swivel angle measuring device (44) has a movable encoder formed by a permanent magnet (46) and a housing-mounted sensor (48). The swivel angle measuring device (44) is translational, wherein the permanent magnet (46) can be moved linearly and translationally by the actuating piston (38) along its direction of movement (45) by means of a magnetic coupling device.

The utility model discloses an axial plunger pump / motor shaft tail structure which comprises a shell (6), a transmission shaft (1) penetrating through the shell (6) is arranged in the shell (6), a bearing (5) is arranged outside the transmission shaft (1), the bearing (5) comprises a bearing inner ring (5.1) in interference fit with the transmission shaft (1) and a bearing outer ring (5.2) in clearance fit with the shell (6), and a check ring (7) for limiting the bearing inner ring (5.1) is arranged outside the bearing inner ring (5.1). A front cover (4) used for fixing the check ring (7) and limiting rotation of the bearing outer ring (5.2) is arranged outside the check ring (7), a sealing ring (8) is arranged between the front cover (4) and the shell (6), an oil seal (9) is arranged at the joint of the front cover (4) and the transmission shaft (1), and a pressing plate (3) used for pressing the front cover (4) and the oil seal (9) is arranged on one side of the front cover (4). The utility model can reduce the possibility of damage to a bearing or a shell and reduce the possibility of oil leakage.

To enable fluid to be properly supplied to a sliding surface via a flow passage portion.SOLUTION: A fluid-operated machinery comprises: a cylinder 11 having a housing portion 11a housing fluid; a piston 21 reciprocating in the cylinder; and a crankshaft 26 which has a sliding surface 29 sliding with respect to the piston 21, and which performs rotational motions in conjunction with the reciprocation of the piston 21. The piston 21 has: a communication path 54 which axially penetrates through the piston 21, and in which the fluid flows; and a recess 56 communicating with the communication path 54 at the housing portion 11a side, and having an opening area which is larger than that of the communication path 54. The fluid-operated machinery further comprises a filter member 60 which is provided in the recess 56.SELECTED DRAWING: Figure 2

The utility model discloses a radial plunger motor with a braking function, which comprises an output flange shaft, a fixed shell rotationally connected with the output flange shaft, and a braking cylinder connected with the output flange shaft, the friction plate set is located between the fixed shell and the brake cylinder body, static friction plates in the friction plate set are connected with the fixed shell, and dynamic friction plates in the friction plate set are connected with the brake cylinder body; and the double-piston assembly is arranged in the fixed shell and located on one side of the friction plate set, and the double-piston assembly can be used for braking the brake cylinder body. Through the structural improvement, on one hand, the overall compactness of the motor can be improved, and the axial size is reduced, so that the motor can be suitable for a scene with a smaller installation space; on the other hand, the double-piston structure is adopted, the acting area can be increased, the acting force can be increased, and therefore the larger braking torque can be obtained under the condition of the same radial size; and the opening pressure of brake release can also be reduced.

The invention relates to a hypocycloid mechanism comprising: a shaft (4); a gearwheel (7) rotatable about its center and coupled to the shaft (4); a pinion (8) parallel to the gearwheel (7), the pinion being rotatably mounted on an axle eccentrically passing through the gearwheel (7); a cylinder (1) having a piston (2); a connecting rod (3), one side of which is connected to the piston (2) and the other side of which is rotatably connected to the pinion (8), such that the rotation of the gearwheel (7) and the pinion (8) is associated with the reciprocating movement of the piston (2); at least one bearing-supported stationary part (6) in which the gearwheel (7) is rotatably mounted. The present invention is characterized in that: a fixed member (6) is an annular member provided with teeth on the inner side, and a pinion gear (8) provided with teeth on the outer side and meshing with internal teeth (6 ') of the fixed member (6); the gearwheel (7) is provided with teeth on the outside and is rotatably mounted in the stationary part (6) by means of a bearing (6 '') such that the teeth (6 ') of the stationary part (6) extend over a portion of the thickness of the stationary part, and the stationary part further comprises a toothless surface extending over a portion of the thickness of the stationary part and having a bearing support (6''), a gearwheel (7) having a toothless surface complementary to the bearing (6 '') of the stationary part, the gearwheel (7) being coupled by its teeth (7'') to the shaft (4); the connecting rod (3) has two arms (3a, 3b) extending on both sides of the gear assembly (7, 8) wherein a first arm (3a) is connected to the pinion (8) at a first pivot point (O) on one side of the gear assembly (7, 8) and a second arm (3b) is connected to the pinion (8) at a second pivot point (O) on one side of the gear assembly (7, 8). And the second arm (3b) is connected to the pinion (8) at a second pivot point (O ') on the other side of the gear assembly (7, 8) wherein the orthographic projection of the first point (O) on the plane of the gearwheel (7) and the orthographic projection of the second point (O') on the same plane of the gearwheel (7) are always equal. The invention also relates to an engine and a compressor comprising such a mechanism.

A rotational engine system comprises a rotational engine and a propulsion system. The rotational engine includes an outer ring enclosure, an inner ring component, and a drive gear. The inner ring component includes a piston and a drive gear engagement portion. The piston is configured to travel within the outer ring enclosure along a circumference of the outer ring enclosure. The drive gear engagement portion is configured to rotate as the piston travels along the circumference of the circular shape of the outer ring enclosure. The drive gear is coupled to the drive gear engagement portion of the inner ring component such that rotation of the drive gear engagement portion rotationally drives the drive gear. The propulsion system is configured to deliver propulsive energy to propel the piston along the circumference of the outer ring enclosure.

The invention relates to the technical field of plunger pumps, in particular to a variable flow plunger pump which comprises a driving unit, a plurality of variable pumps, a plurality of variable flow executing mechanisms and a transmission mechanism. The variable pumps are connected with the driving unit; the variable flow executing mechanisms are connected with the variable pump. The transmission mechanism comprises a plurality of driving transmission parts and a driven transmission part, the driving transmission parts are located on the outer side of the driven transmission part and connected with the driven transmission part, and the driving transmission parts are connected with the variable flow executing mechanism. According to the variable-flow plunger pump, the variable pump is driven by the driving unit to output variable-flow hydraulic oil, large-range real-time adjustment of flow can be achieved through cooperation of the variable pump and the variable-flow executing mechanism and variable-flow control, adjustment is accurate, and large-torque output of the variable-flow executing mechanism at different rotating speeds is guaranteed; the multiple driving transmission pieces drive one driven transmission piece to rotate, stress is uniform, the abrasion loss is reduced, and the structure is more compact.

The invention relates to the technical field of marine equipment, and particularly discloses a ship fin stabilizer which integrates bionic resistance reduction, intelligent control and energy recovery functions. The fins are of a layered structure of a flexible silica gel skin and a shape memory alloy wire mesh, V-shaped groove arrays are arranged on the surfaces of the fins, and the fins can be self-adaptively deformed into a U shape to reduce resistance. The driving mechanism realizes high-frequency compensation through cooperation of a hydraulic cylinder and piezoelectric ceramics; the energy recovery module converts mechanical energy into electric energy through a two-way pump-generator. According to the device, the rolling trend is predicted through the LSTM neural network, a Q-learning optimization control strategy is combined, the stabilization efficiency and energy efficiency are remarkably improved, and the device is suitable for stable control of ships under high navigational speed and complex sea conditions.

A linear energy harvesting device that includes a housing and a piston that moves at least partially through the housing when it is compressed or extended from a rest position. When the piston moves, hydraulic fluid is pressurized and drives a hydraulic motor. The hydraulic motor drives an electric generator that produces electricity. Both the motor and generator are central to the device housing. Exemplary configurations are disclosed such as monotube, twin-tube, tri-tube and rotary based designs that each incorporates an integrated energy harvesting apparatus. By varying the electrical characteristics on an internal generator, the kinematic characteristics of the energy harvesting apparatus can be dynamically altered. In another mode, the apparatus can be used as an actuator to create linear movement. Applications include vehicle suspension systems (to act as the primary damper component), railcar bogie dampers, or industrial applications such as machinery dampers and wave energy harvesters, and electro-hydraulic actuators.

Disclosed is an adjustable, secondary-controlled axial piston motor with a housing (1) in which an output shaft (2) is rotatably mounted with respect to an axis of rotation (3). The output shaft (2) is rotationally fixed to a cylinder drum (4) with respect to the axis of rotation (3), in which several working pistons (12) are linearly movable. According to the invention, a speed sensing device is provided for detecting the rotational speed of the output shaft (2).

The invention provides a compressed air energy storage system which comprises an air compressor set used for compressing air, an underground air storage facility set used for storing the compressed air, a first liquid storage tank, a hydraulic generator set, a second liquid storage tank and an air turbine generator set. And liquid in the second liquid storage tank is pressed into the hydraulic generator set so that the hydraulic generator set can generate electricity, the liquid leaving the hydraulic generator set enters the second liquid storage tank, air in the second liquid storage tank is pressed into the air turbine generator set so that the air turbine generator set can generate electricity. The system can be suitable for high-pressure deep stratums, and a larger application range and higher system circulation efficiency are achieved.

A magnetic bearing for supporting the movement of a piston sliding into a cylinder comprised in a compressor. The piston comprises a first rod that connects the piston to a cross-head of the compressor and an extension rod, which is connected to the first rod. The magnetic bearing comprises a first group of magnets arranged on a first side of the extension rod of the piston, a second group of magnets arranged on a second side of the extension rod of the piston, wherein the magnetic forces exerted by the first group of magnets and the second group of magnets respectively allow the piston to be supported during its movement. The present disclosure also concerns a method of assembling a magnetic bearing.

The invention discloses a large torque hydraulic motor crankshaft, which can improve the starting torque and transmission torque of the motor. The invention is realized by the following technical scheme: the eccentric crank neck end of the motor crankshaft and the coaxial connecting rod are connected to the eccentric wheel shaft, which limits the horizontal, up and down, front and back reciprocating freedom of the crankshaft. A pressure ring that bears the hydraulic pressure and a needle roller installed in the pressure ring are installed on the crankshaft between the eccentric crank neck end and the eccentric wheel shaft end, and each pressure ring is arranged at intervals by a spacer ring and distributed in a linear array between the positioning spacer ring and the retaining ring, so as to ensure that the needle roller is always in contact with the pressure ring during the operation of the crankshaft, play an axial positioning role for the needle roller, and form a static pressure balance structure with the crankshaft kinematic pair; the hydraulic pressure applied to the pressure ring generates a torque that rotates the crankshaft through the eccentric distance e of the crankshaft, and the needle roller converts the sliding friction kinematic pair between the inner surface of the pressure ring and the outer surface of the crankshaft into a rolling friction kinematic pair. The reliability of transmission efficiency and stable precision is guaranteed.

A closure element for a fluid end assembly that has two or more recessed grooves formed in its outer surface. The grooves are axially offset. A seal is placed in one and only one of the grooves. As wear occurs, the seal is relocated to one of the other grooves. Instead of a series of axially offset grooves in a single closure element, a kit may be formed from two or more otherwise identical closure elements, each with a single recessed groove at a different axial position. Another closure element has a series of ledge-like surfaces defining spaces within which a seal may be received. One outer surface surrounds one or more of the other surfaces. A seal is placed in one and only one of the spaces. As wear occurs, the seal is relocated to one of the other spaces.

The present invention relates to a pneumatically driven piston pump and its quick exhaust slide valves, which allows air to be evacuated from the piston pump's piston chambers directly into the environment without having to pass through the main distributor valve, in such a way that it does not cause a drop in temperature due to the expansion of the compressed air which freezes the humidity of the air itself, clogging the compressed air circulation ducts and causing the pump to shut down or stall. Such an air-operated piston pump with quick exhaust valves allows the passage of air with low restriction, which increases the efficiency of the piston pump and decreases its compressed air consumption compared to the same air motor without quick exhaust valves.

A hydraulic device (1) comprising a rotor (3, 9, 10, 11, 16-18, 23) and a port member (5) including a high pressure port (6) and a low pressure port (7). An outer surface (21) of the rotor faces an outer surface (22) of the port member (5) and is rotatable in a rotational direction about a rotation axis (19) relative to the port member (5). The rotor comprises a plurality of cylinders (11) angularly spaced apart from one another about the rotation axis (19) and a plurality of cooperating pistons (10) movable within each cylinder (11). The cylinders (11) communicate with respective open ends (25) at the outer surface (21) of the rotor, each of the open ends (25) alternately communicating with the high pressure port (6) and the low pressure port (7) under operating conditions. Every two consecutive cylinders (11) of the plurality of cylinders (11) are interconnected via a fluid displacement member (26). The fluid displacement member has a first opening (27) communicating with one of the two consecutive cylinders (11), a second opening (28) communicating with the other of the two consecutive cylinders (11), and a closure element (29) freely movable between the first and second openings (27, 28) and configured to substantially block either the first opening (27) or the second opening (28) when, under operating conditions, the pressure in the cylinder (11) communicating with the second opening (28) is higher or lower, respectively, than the pressure in the cylinder (11) communicating with the first opening (27). A flow resistor (30) is provided in the rotor (3, 9, 10, 11, 16-18, 23) at a position away from each open end (25), and a first opening (27) and a second opening (28) of each of two fluid displacement members (26) communicating with one cylinder (11) are in fluid communication with that cylinder (11) on the opposite side of the flow resistor (30).

Hydraulic machine with improved distribution Hydraulic machine, in which pistons are mounted sliding in housings along a sliding axis, each housing forming with the associated piston a first chamber (60) and a second chamber (70) distinct, characterized in that, the cylinder block (4) is configured so that, in projection along a plane perpendicular to the main axis (ZZ), for at least one housing, the conduit connected to the housing in which a piston slides opens at the interface between the distributor (3) and the cylinder block (4) in a manner angularly offset by an angle A relative to the sliding axis of the piston in said housing (44). Figure for the abstract: Fig. 5.

The radial cam engine described consists of a piston assembly arranged in a radial configuration. Within the engine, a piston moves back and forth within a cylinder during the internal combustion process. The piston is connected to a follower that is guided and interacts with a central cam. This central cam is responsible for turning a drive shaft. The radial cam incorporates three different cam profiles, each designed for a specific stage of the engine's operation. These profiles are specifically tailored for the compression stroke, combustion stroke, and exhaust stroke. By utilizing distinct cam profiles for each stroke, the engine can optimize its performance throughout the entire combustion process.

The present invention relates to internal combustion engines, to opposed-piston internal combustion engines in particular.The opposed-piston internal combustion engine comprises a working cylinder and an adjacently-located compressor cylinder. The working cylinder comprises a first working piston and a second working piston, an inlet port and an outlet port formed on the working cylinder, a spark plug and a fuel injection nozzle arranged in the working cylinder, a first crankshaft and a second crankshaft. The engine also comprises a crankshaft transmission coupling the first crankshaft with the second crankshaft. The compressor cylinder comprises a first compressor piston and a second compressor piston, an air-exchange port in order to provide the inflow and outflow of air from the compressor cylinder, and a compressed-air overflow channel providing forcing of the compressed air to the working cylinder.

Volumetric variable displacement machine interacting with an operating fluid, said machine being a motor with axial pistons or a pump with axial pistons and comprising: i) means (2) interacting with the operating fluid; ii) a housing casing (3) housing means (2) interacting with the operating fluid; iii) actuating means (4) for regulating a displacement of the machine; iv) a control unit (5) for controlling the actuating means (4); v) a detection sensor (6) for detecting a parameter associated with the adopted displacement of the machine and operationally connected to the control unit (5); vi) a protective casing (7) protecting the control unit (5) that is integrated into or physically constrained on said housing casing (3). The detection sensor (6) is placed inside the protective casing (7).

The invention discloses a compressed air power generation control system based on mechanical virtual inertia and a power generation method, and belongs to the technical field of distributed power generation microgrids. Comprising a mechanical control system and a virtual inertial system. The mechanical control system comprises an air storage tank, an air compressor, a switch valve, a pressure sensor, a temperature sensor, a hydraulic motor, a magnetic gearbox, a power generation system and a power grid load. The air storage tank, the air compressor, the switch valve, the hydraulic motor, the magnetic gear box, the power generation system and the power grid load are connected in sequence; and the pressure sensor and the temperature sensor are respectively connected with the air compressor. The power generation stability is controlled through the mechanical virtual inertia method, the efficiency of the compressed air power generation system is improved, and stable operation of the compressed air power generation system under different working conditions is guaranteed.

A linear reciprocating piston engine comprising: A cylinder; a piston located within the cylinder, the piston separating upper and lower combustion chambers of the cylinder; a separation plate disposed across a lower end of the cylinder to seal the lower combustion chamber; and a joint disposed in the separation plate, the joint comprising a bore through which a connecting rod extends to connect the piston to a crankshaft. Movement of the piston along a longitudinal axis of the cylinder causes the connecting rod to rotate the crankshaft, said rotation of the crankshaft causing both transverse and angular movement of the connecting rod relative to the longitudinal axis of the cylinder. The angular movement of the connecting rod causes a corresponding angular movement of the joint. The joint comprises a curved outer surface configured to ensure contact with an outer seal disposed between the separation plate and the joint during said angular movement of the joint. The joint further comprises an inner seal disposed between the bore and the connecting rod; wherein the outer and inner seals are selected from any one of: a split ring compression seal; a split ring expansion seal; and a split ring labyrinth seal.

The invention provides a hydraulic motor / pump and a manufacturing method of a rear cover, the hydraulic motor / pump comprises a cylinder body and the rear cover which rotate relatively, the rear cover forms a part of a shell of the motor / pump, and a first area of the rear cover is in contact with a second area of the cylinder body to form a friction pair; the first area is provided with an oil inlet for guiding hydraulic oil into the cylinder body, an oil outlet for guiding the hydraulic oil out of the cylinder body and a plurality of flow distribution grooves, and the flow distribution grooves communicate with the oil inlet and the oil outlet correspondingly. One of the first region and the second region forms a hardened layer by surface hardening. By means of the arrangement, a gap between the valve plate and the rear cover is avoided, hydraulic oil can be prevented from leaking between the valve plate and the rear cover when the motor or the pump works, leakage of the hydraulic oil is reduced, and pressure loss of the hydraulic oil is reduced. The hardness of one of the first area and the second area is increased, the requirements for abrasion resistance and high hardness are met under the conditions of low cost and small deformation, and therefore the service life of the rear cover and the service life of the cylinder body are prolonged.