226results about "Reciprocating piston engines" patented technology

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).

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).

A hydrostatic axial piston machine (1), in particular an axial piston pump, with an adjustable displacement volume, which is operated in a closed circuit, wherein the displacement volume is adjustable by means of an actuating device (4), wherein the actuating device (4) comprises a pressure-cutting function (16) which has a pressure-cutting valve (15) which is actuated depending on the pressure at a first pressure port (A) of the axial piston machine (1) and depending on the pressure at a second pressure port (B) of the axial piston machine (1). The pressure-cutting valve (15) is operatively connected to a first actuating piston (35a) which is actuated by the pressure at the first pressure port (A), and to a second actuating piston (35b) which is actuated by the pressure at the second pressure port (B).

A piston arrangement comprising: a piston; a rotatable element, rotatable about an axis, having a first engagement profile; and a mechanism comprising: a first connecting element connected to the piston; a second connecting element pivotable about a fixed point and pivotally connected to the first connecting element; and a second engagement profile coupled to the first and / or second connecting element, configured to mechanically engage and disengage with the first engagement profile of the rotatable element.

The application discloses a hydraulic motor with a floating oil seal protection device, which comprises a motor assembly, a shell covering the motor assembly, and a speed reduction assembly connected with one end of the motor assembly, wherein a gear ring is arranged on the speed reduction assembly, a first matching gap is arranged at the joint of the motor assembly and the gear ring, an annular sleeve is arranged on the outer side of the first matching gap, a groove is arranged on the end face of the sleeve close to the gear ring, a sealing ring is arranged annularly on the gear ring in the groove, the sealing ring is in interference fit with the gear ring, and an O-shaped ring is arranged on the outer side of the sealing ring. The protection device of the floating oil seal at the joint of the motor assembly and the speed reduction assembly is added, so that the problem that impurities are easily introduced into the gap between the motor assembly and the speed reduction assembly, the floating oil seal is abraded and corroded, and the speed reduction assembly is damaged or leaks oil is solved.

The invention provides a method for controlling a hydraulic drive system having at least two hydraulic machines (2a, 2b).SOLUTION: For each of the hydraulic machines 2a, 2b, a setpoint value for a delivery quantity of the hydraulic machine is detected, wherein the delivery quantity is dependent on the displacement volume, and wherein manipulated values for the displacement volumes of the two hydraulic machines 2a, 2b are implemented in such a way that a ratio of the manipulated values to one another is equal to a corresponding ratio of the setpoint values, and in such a way that at least one condition is satisfied, the at least one condition includes a condition that the sum of the driving amount requests of the hydraulic machines 2a and 2b corresponding to the operation values is equal to or smaller than the driving amount maximum value, and the hydraulic machines 2a and 2b are controlled using the determined operation values.SELECTED DRAWING: Figure 1

The bore is reduced while the stroke is not lengthened to maintain the required displacement. [Solution] If we consider a square combustion chamber with a displacement of approximately 500cc, a bore and stroke of 54mm x 54mm x 4 pistons results in a very small bore and stroke of 494.6cc, compared to a normal single-piston engine with a bore and stroke of 85.72mm x 85.72mm and a displacement of 494.6cc. With an area ratio of 2.52 to 1 compared to a normal single-piston engine, the 4 pistons will experience more than 2.5 times the combustion pressure if the compression ratio is the same. If a normal single-piston 3-cylinder 1484cc engine produces 100 horsepower, then a 4-piston engine would theoretically produce 250 horsepower. And all this with the fuel efficiency of a naturally aspirated 1.5L engine. Although there are considerable mechanical losses due to the movement of four pistons and two crankshafts, the resulting increase in power more than compensates for these losses.

The invention discloses a method for quantitatively controlling direct use of wind power generation, and relates to the technical field of wind power generation. A tower top generator and a speed increasing mechanism are removed, the blade structure is simplified, the structural defect that a traditional wind tower is heavy at the top and light at the bottom is thoroughly overcome, the wind resistance and the load resistance of the wind tower in the extreme environment are greatly improved, and meanwhile under the synergistic effect of a hydraulic system, a conventional generator and an EMS electric control system, the wind resistance and the load resistance of the wind tower are greatly improved. Fault points prone to occurring during long-term operation of a complex mechanism are reduced, the overall fault rate is reduced to a great extent, and the safety and reliability are remarkably improved; a conventional generator is adopted at an equipment end, a variable pitch and high speed increasing structure is not needed, the equipment purchase and maintenance cost is remarkably reduced, meanwhile, a wind tower structure and a foundation which are mostly adopted at a construction end are lightweight, the construction cost is effectively reduced, the wind curtailment rate is effectively reduced at an operation end, the wind energy utilization rate is remarkably increased, and the wind power generation efficiency is improved. Meanwhile, power grid leveling and a large amount of energy storage cost are saved.

Hydrostatic axial piston machine (1), in particular an axial piston pump, with adjustable displacement volume, wherein the displacement volume is adjustable by means of a control piston device (5) which has at least one control pressure chamber (5a; 5b). A control pressure valve (10a; 10b) is provided which generates a control pressure acting on the control pressure chamber (5a; 5b). The control pressure valve (10a; 10b) is actuated by a control device (20a; 20b) in the direction of a first control position connecting a first port (A1) with a second port (A2) and is actuated by the control pressure present in a control pressure line (15a; 15b) in the direction of a second control position connecting the second port (A2) with a third port (A3).The actuating pressure valve (10a; 10b) has a control spool (32a; 32b) arranged longitudinally displaceably in a housing bore (30) of a valve housing (31), which is provided with a longitudinal bore (50a; 50b) extending in the control spool (32a; 32b) from an end face (51a; 51b) of the control spool (32a; 32b) to a bore base (52a; 52b). A cylindrical support body (55) is arranged longitudinally displaceably in the longitudinal bore (50a; 50b), and the bore base (52a; 52b) is designed as a control surface actuated by the actuating pressure.

A rotary steam engine includes: a stator mechanism including two stators forming a track therebetween; a rotor rotatably arranged between the stators and including cylinders and perorations open on an outer surface of the rotor and communicating with the cylinders; a mandrel disposed through the stator mechanism and the rotor; pistons respectively received in the cylinders and respectively including piston shafts movable along the track, an engine lubricating system being formed between the cylinders, pistons and stators; and gas covers radially movable, resiliently disposed on the stator mechanism and covered on the rotor; wherein when a gas injection space between the gas cover and the rotor communicating with the perorations, steam can flow to enter the cylinders to drive the pistons; wherein when the gas injection space is not in communication with the perorations, the pistons move to discharge steam in the cylinders via the perorations.

The present disclosure relates to a positive displacement machine device (1) comprising a constant displacement machine (2) with a fixed displacement volume and a variable displacement machine (3) with an adjustable displacement volume, wherein in pump operation of the positive displacement machine device (1) a fluid (4) can be conveyed from an inlet (5) of the positive displacement machine device (1) to an outlet (6) of the positive displacement machine device (1) by means of the constant displacement machine (2) and / or the variable displacement machine (3), wherein in motor operation of the positive displacement machine device the constant displacement machine and / or the variable displacement machine can be driven by fluid flowing from the inlet to the outlet. Noise emissions of the displacement machine device (1) are reduced and / or the displacement machine device (1) can be operated at high speed by fluidically connecting the inlet (5) to a first port (21) of the constant displacement machine (2) and to a first port (31) of the variable displacement machine (3), and wherein the outlet (6) is fluidically connected to a second port (22) of the constant displacement machine (2) and to a second port (32) of the variable displacement machine (3).

The present invention relates to a hydraulic pump with variable flow and reversible direction of rotation having a simple configuration and comprising a casing, a rotary shaft, a platen, two pumping pistons, a drum with a pumping cylinder for each pumping piston, a plate between the drum and the casing and surrounding the shaft with an intake opening and a delivery opening, both being diametrically symmetrical, and the plate having a protrusion. The invention further comprises a first pin in a first housing of the casing and a second pin in a second housing of the casing, both transverse to the shaft and accessible from the outside. The first pin has a first length such that it contacts the protrusion and the second pin has a second length such that it contacts the protrusion, and when the first pin and the second pin change positions, the plate rotates and the pump is configured to operate in the opposite direction of rotation.

The invention provides a star piston power system based on a magnetic transmission switching valve. The star piston power system comprises a plurality of piston expanders, an air inlet subsystem and an exhaust subsystem. The piston expanders are distributed in a star shape; the air inlet subsystem comprises a first valve body, a first sliding block and a first rotating disc, the first valve body is provided with a first annular cavity and a plurality of first air outlets, the first sliding block is movably arranged in the first annular cavity, and the first rotating disc is rotatably arranged on the first valve body and magnetically attracts the first sliding block; the exhaust subsystem comprises a second valve body, a second sliding block and a second rotary disc, the second valve body is provided with a second annular cavity and a plurality of second air inlets, the second sliding block is movably arranged in the second annular cavity, and the second rotary disc is rotatably arranged on the second valve body and magnetically attracts the second sliding block. The star piston power system based on the magnetic transmission switching valve can effectively reduce energy loss of the system and improve the overall energy efficiency of the system, and is more suitable for the working condition of a low-temperature heat source.

The present application relates to the technical field of hydraulic system, and proposes a hydraulic control system and working machine. In the hydraulic control system, the swash plate oil cylinder comprises a cylinder barrel and a piston. The piston is in sliding connection with the cylinder barrel. The piston is connected with the swash plate of the walking motor. The spring cavity, the first working cavity and the second working cavity are formed between the piston and the cylinder barrel. The acting area of the first working cavity is larger than that of the second working cavity. The swash plate control valve is connected with the oil source and the swash plate oil cylinder, and is used for controlling the communication state of the oil source with the first working cavity and the second working cavity. Through the structure setting, the first working cavity, the second working cavity and the spring cavity are arranged between the cylinder barrel and the piston, so that the difference between the acting area of the piston in the first working cavity and the acting area of the piston in the second working cavity is formed. The communication state of the first working cavity and the second working cavity with the oil source is controlled through the swash plate control valve, so that the walking motor realizes the switching of more speed states, and the speed regulating range of the walking motor is expanded.

The disclosure relates to a method for operating an internal combustion engine of a truck or omnibus, in particular a truck or omnibus with a permissible total mass of at least 3.5 tonnes, wherein (i) an electrolysis unit for the production of hydrogen, water is split into hydrogen and oxygen, (ii) a carbon dioxide sorption unit extracts carbon dioxide from the ambient air, (iii) the hydrogen and the carbon dioxide are fed to a methanol synthesis unit for the production of methanol, and are synthesised therein to methanol, (iv) a photovoltaic unit absorbs solar energy and converts it into electrical energy. The electrolysis unit, the carbon dioxide sorption unit and the methanol synthesis unit are powered by the electrical energy generated in the photovoltaic unit. The methanol produced is transported by means of a distributor system to at least one tank of the truck or omnibus, and is supplied from the tank as required to the internal combustion engine, and therein is combusted to generate mechanical energy.

A compound connecting rod for improving the efficiency of an internal combustion engine. The compound connecting rod includes a connecting rod, a connecting rod carrier, and a collapse blocker. During crankshaft rotation, the compound connecting rod undergoes a non-circular path that increases dwell time of a piston, reduces sidewall friction, and reduces secondary imbalance.

The invention relates to an axial piston machine (1), in particular an axial piston pump, with a piston drum (2) that can be driven in at least one direction of rotation (22), with cylinders (10) arranged in the piston drum which are spaced apart from each other in the direction of rotation by a piston pitch (24) and are designed to slidably receive pistons (4) having a piston diameter (34), wherein longitudinal axes (16) of the pistons are arranged parallel to each other on a pitch circle (28) having a pitch circle diameter (26), and wherein: 0.377 z K ≤ (DT, K d K) ≤ 0.4948 z K, where D T,K the pitch circle diameter, d K the piston diameter and z K The number of pistons corresponds to this. Such an axial piston pump is quiet in operation yet compact.

The invention relates to an axial piston machine (1), in particular an axial piston pump, with a piston drum (2) that can be driven in at least one direction of rotation (22), with cylinders (10) arranged in the piston drum which are spaced apart from one another in the direction of rotation by a piston pitch (24) and are configured to slidably receive pistons (4) having a piston diameter (34), wherein the longitudinal axes (16) of the pistons are arranged parallel to one another on a pitch circle (28) having a pitch circle diameter (26), and wherein: 0.377zK ≤ DT,KdK ≤ 0.4948zK, where DT,K corresponds to the pitch circle diameter, dK to the piston diameter, and zK to the number of pistons. Such an axial piston pump is quiet in operation and yet compact.

The invention relates to the technical field of shell rotating type hydraulic motors, in particular to a self-compensation flow distribution device and an inner curve hydraulic motor. The self-compensation flow distribution device comprises a flow distribution disc, a plurality of connecting keys, an annular connecting plate, a plurality of spring devices and an annular spring mounting base, a plurality of connecting key mounting grooves and bosses are evenly arranged on the outer circumference of the flow distribution disc in the circumferential direction, the lower portions of the connecting keys are clamped in the connecting key mounting grooves and fixed to the connecting plate, and the connecting key mounting grooves and the bosses are connected through the spring devices. The right side walls of the connecting key mounting groove and the boss abut against the connecting plate in an attached mode, the left side face of the spring device makes contact with the right side face of the connecting plate, and the spring mounting base is fixed to the connecting plate through a pin. When the axial gap of the working face is enlarged in the working process, under the action of the elastic force of the spring, the valve plate assembly automatically compensates and moves leftwards, it is guaranteed that the valve plate assembly is tightly attached to the working face of the cylinder body all the time, and therefore leakage between a friction pair cannot be increased.

The utility model relates to the field of hydraulic plunger motors, in particular to a damping type hydraulic plunger motor which comprises a motor body and further comprises a quick release mechanism, and the quick release mechanism is composed of a bottom plate, a first fixing plate, a second fixing plate, a circular groove, a first fixing block, a threaded rod, a hexagonal block, a cross groove, a shifting block, a movable plate, a circular block, a clamping plate, a second fixing block and a fixing rod. A bottom plate is arranged at the bottom of the motor body, a second fixing plate is connected to the bottom of the motor body, a first fixing plate is connected to the bottom of the second fixing plate, and two circular grooves are formed in the right end of the second fixing plate; a quick release mechanism is arranged, a shifting block is rotated or a hexagonal block and a cross-shaped groove are rotated by using a tool, so that a threaded rod moves leftwards to push a moving plate, and meanwhile, a circular block on the moving plate is inserted into a circular groove until a first fixing plate and a second fixing plate are clamped and fixed; the problems that a damping device of a damping type hydraulic plunger motor is usually fixed to the hydraulic plunger motor and is not convenient to disassemble, and consequently regular inspection and component replacement become difficult are solved.

The present application belongs to the field of aircraft hydraulic system, and discloses a double-acting axial plunger motor, which comprises a cylinder body, a piston, an inclined disc, a flow distribution shaft, a torque limiting transmission shaft and a synchronous transmission gear train; at least three pistons are uniformly circumferential through the cylinder body and can reciprocate axially relative to the cylinder body; the piston is a structure of bidirectional piston rod and middle piston head, and the cylinder body is provided with two independent hydraulic chambers corresponding to the double axial direction of each piston head; two inclined discs are pressed on the two ends of the piston and rotate with the regular reciprocating motion of the piston, the rotation of the inclined disc drives the synchronous transmission gear train on the outside of the inclined disc to move, also drives the torque limiting transmission shaft on the inside of the inclined disc to rotate, the torque limiting transmission shaft is connected and drives the flow distribution shaft arranged on the axis of the cylinder body to rotate, and the flow distribution shaft is provided with an interface to connect the external hydraulic source and the hydraulic chamber in the cylinder body; with the rotation of the flow distribution shaft, the hydraulic pressure is regularly supplied to different hydraulic chambers, so that the two inclined discs continuously rotate.

An axial piston pump having an energy recovery system.

The invention relates to a hydrostatic axial piston machine (1), in particular an axial piston pump, with an adjustable displacement volume, which is operated in a closed circuit, wherein the displacement volume is adjustable by means of an actuating device (4), wherein the actuating device (4) comprises a pressure-cutting function (16) which has a pressure-cutting valve (15) which is actuated depending on the pressure at a first pressure port (A) of the axial piston machine (1) and depending on the pressure at a second pressure port (B) of the axial piston machine (1). The pressure-cutting valve (15) is operatively connected to a first actuating piston (35a), which is actuated by the pressure at the first pressure port (A), and to a second actuating piston (35b), which is actuated by the pressure at the second pressure port (B).

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.

The utility model discloses a kind of real-time speed measurement motor with anti-suction function, including motor assembly and rear cover, rear cover is connected with anti-suction check valve and rotational speed sensor;The shell of the motor assembly is equipped with oil inlet A and oil return B, and the shell of the rear cover assembly is equipped with oil inlet A and oil return B.The utility model adopts integrated arrangement hydraulic element, installation space is compact, utilizes motor internal oil cavity to reduce pipeline connection, and it is easy to operate.

The invention discloses a steam engine, which comprises a steam generating part; the air pressure parts comprise first pistons and second pistons, the first pistons are arranged in the first cavities, and the second pistons are arranged in the second cavities; the transmission shaft comprises first crank pins and second crank pins, one first crank pin is a high-pressure main crank pin, the other first crank pin is a low-pressure main crank pin, one second crank pin is a high-pressure auxiliary crank pin, the other second crank pin is a low-pressure auxiliary crank pin, the first crank pins are connected with the first piston, and the second crank pins are connected with the second piston. The high-pressure main crank pin, the low-pressure main crank pin, the low-pressure auxiliary crank pin and the high-pressure auxiliary crank pin are arranged in the rotating direction of the transmission shaft; the plugging surface is provided with a plugging side and an opening side; the first crank pin is disconnected from the steam generating part in the blocked side first cavity, and is communicated with the steam generating part in the open side first cavity; the second crank pin is disconnected from the first cavity and the second cavity on the blocking side and communicated with the first cavity and the second cavity on the opening side. The steam engine is high in energy utilization rate and large in output torque.

The invention discloses a thrust plate and a preparation method thereof in the technical field of mechanical parts, the thrust plate comprises a substrate, the substrate comprises a first surface, a second surface and an identification part, the first surface and the second surface are arranged oppositely, and the identification part is used for distinguishing the first surface and the second surface; the first surface is used as a mounting surface; and the second surface is coated with a wear-resistant layer which is used for forming a friction pair with a paired part. The thrust plate is suitable for mechanical transmission scenes needing to solve the problems that copper hanging and material stripping are prone to occurring on a single-metal thrust plate, copper hanging and material stripping are effectively avoided, and the service life is prolonged.

A system includes a structure including a fixed rigid structure and a wind catching panel. The wind catching plate is installed on the rigid structure, is suitable for being impacted by impact wind and is suitable for being movable relative to the rigid structure under the action of the force of the impact wind. The system also includes a force transfer assembly disposed between the rigid structure and the wind capture panel. The force transfer assembly is adapted to receive a force on the wind capture element that impacts the wind and to transfer the force away from the structure. The system may also include a power generation assembly functionally associated with the force transfer assembly and adapted to receive a force transferred away from the structure and to use the force to generate power.