178results about "Engine of intermeshing engagement type" patented technology

The disclosure relates to a screw pump (2) comprising: a casing (3) with an inlet (30), an outlet (31) and a flow chamber (32) between the inlet and the outlet, and at least two screws (4, 5, 6) housed in the flow chamber to force a fluid flow 5 through the flow chamber from the inlet to the outlet, wherein each screw (4, 5, 6) comprises a release coupling (45, 52, 62) to restrict, when in use, the rotation of the screw when it is being extracted from a molding tool.

The invention belongs to the technical field of waste heat utilization, and particularly relates to a low-temperature waste heat recovery power generation system oriented to all working conditions and a control strategy. Comprising a waste heat recovery system, a circulation system, a cooling system and an intelligent safety alarm platform system. Wherein; the waste heat recovery system comprises a waste heat air inlet, a total flow transmitter, a communicating valve, a stop valve, a filtering device and a waste heat air outlet. One end of the waste heat air inlet is used for allowing waste heat to enter, and the other end is connected with the total flow transmitter; the total flow transmitter is used for measuring total flow and transmitting monitoring data, and the total flow transmitter is sequentially connected with the stop valve and the filtering device; the problem of large waste heat recovery volatility under different working conditions can be effectively inhibited, the power generation overshoot is stabilized within + / -5%, a full-process control system of waste heat power generation is perfected, generated electric energy can be subjected to energy grid connection at the maximum power, energy waste is reduced, and the utilization efficiency of waste heat is improved.

The utility model discloses a two-stage screw expander. The two-stage screw expander comprises a first-stage screw expander, an interstage gear assembly, a second-stage screw expander and a regulating valve assembly, the first-stage screw expander is a high-pressure-stage screw expander, and the second-stage screw expander is a low-pressure-stage screw expander; the two-stage screw expander is provided with an air inlet and an air outlet; an inter-stage gear assembly is arranged between the first-stage screw expander and the second-stage screw expander, and the adjusting valve assembly is arranged on the second-stage screw expander and can conduct corresponding adjustment according to pressure changes of the air inlet and the air outlet. According to the two-stage screw expander, the optimal expansion ratio can be automatically adjusted according to changes of external working conditions, so that the screw expander can work efficiently at any time.

A rotary engine, parts thereof, and methods associated therewith is provided. The engine is modular and adjustable to accommodate a variety of requirements and preferences. The system includes a combustion assembly having a housing and a power rotor positioned therein. The power rotor rotates in a first direction from the beginning of each combustion process through the end of each exhaust process. The system also includes a compression assembly linked to the combustion assembly such that the compression rotor rotates in the first direction from the beginning of each intake process through the end of each compression process. A tank assembly in fluid communication with the compression assembly and the combustion assembly provides stability to the system while eliminating or otherwise reducing transitional loses.

In order to improve a method for operating a compressor / expander machine in a circuit for a working medium, wherein the compressor / expander machine has a machine housing with a screw rotor housing, in which at least one screw rotor arranged between a low-pressure side and a high-pressure side is arranged for compressing / expanding the working medium and is coupled to a motor / generator unit, in such a way that damage is avoided in the region of the screw rotors, it is proposed that an operation control unit is provided for operating the compressor / expander machine and, in the event of termination of operation of the compressor / expander machine, operates the motor / generator unit in accordance with a predetermined speed curve until a lowest speed range of the at least one screw rotor is reached, which prevents damage in the region of the screw rotor.

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.

The present invention relates to a single-screw machine for the compression and / or expansion of a gas, comprising a housing in which a central screw (2) and at least one star rotor (3) are rotatably mounted. The central screw (2) has spiral grooves (21) on its circumference (22), which have an open end (212) and a closed end (211). The star rotor (3) has teeth (31) that engage with the spiral grooves (21) and move along the spiral grooves (21) when the central screw rotates. A recess (23) is provided in the central screw (2) at the closed end of each spiral groove (21), into which the teeth (31) of the star rotor (3) do not project when moving along the spiral groove (21).

A screw compressor or expander is provided, comprising a female rotor (414) including a first section having a right-hand first groove and a second section having a left-hand second groove. The first groove has a first variable helix, the second groove has a second variable helix, and the female rotor has a first variable profile and a first variable outer diameter. The screw compressor or expander further comprises a male rotor (410) including a third section having a left-hand first lobe and a fourth section having a right-hand second lobe. The first lobe has a third variable helix, the second lobe has a fourth variable helix, and the male rotor has a second variable profile and a second variable outer diameter.

To provide a screw rotor which is lighter, more resistant to corrosion, and easier to manufacture in complex forms, than conventional metal screw rotors.SOLUTION: A screw rotor 1 is made of polymer. The screw rotor 1 includes a shaft 2 and a rotor body 3 thereon. The polymer of the shaft 2 is reinforced with fibers. The shaft 2 is characterized by elements 5a that engage the rotor body 3 or corresponding elements on the rotor body 3, such that the elements 5a prevent an axial and / or rotational movement of the shaft 2 with respect to the rotor body 3.SELECTED DRAWING: Figure 1

The invention discloses a rotary piston type pneumatic motor, relates to the technical field of pneumatic motors, and solves the problems that an existing pneumatic motor is complex in structure, large in size, heavy in weight and high in price, the rotary piston type pneumatic motor comprises an air cylinder shell, a main shaft and a blade rotor body, and the main shaft is rotationally installed in the air cylinder shell; the blade rotor body is arranged in the cylinder shell and is rotationally mounted on the eccentric shaft part of the main shaft through a sleeve; the sleeve, the gear shaft and the blade rotor body are in key connection; the blade rotor body is located at the eccentric position of the main shaft, the blade rotor body is driven by an external gas path to rotate in the air cylinder shell, specifically, gas is introduced into the air cylinder shell through the gas path to drive the blade rotor body to rotate, and the internal gas inlet, gas compression and gas exhaust processes are achieved based on the size change of a cavity space formed between the eccentric rotary piston and the cylinder body; and the main shaft is driven to rotate through a gear transmission structure, so that power output is realized.

System (1) for producing work, heating and / or cooling, comprising a heat engine (2) for producing mechanical work, having a plurality of gears (18a, 18b; 23a, 23b; 26a, 26b; 29a, 29b; 30a, 30b, 30c) provided with teeth (D), defining working chambers (20) for expanding a fluid, and arranged to mesh with each other, a generator or alternator (15), connected to the gears (18a, 18b; 23a, 23b; 26a, 26b; 29a, 29b; 30a, 30b, 30c) of the heat engine (2) by means of at least one mechanical shaft, for converting into electric current the mechanical work of rotation of the gears (18a, 18b; 23a, 23b; 26a, 26b; 29a, 29b; 30a, 30b, 30c) induced by the direct thrust of the fluid on the teeth (D), a heat exchanger (3, 4), connected via a conduit to the heat engine (2), to cool and / or heat the fluid, a pump (5) having a plurality of compression stages for compressing the fluid and connected via a conduit to the heat exchanger (3, 4) and via a further conduit to the heat engine (2), a motor (14) to drive the pump (5); the system (1) being characterized in that the teeth (D) of the gears (18a, 18b; 23a, 23b; 26a, 26b; 29a, 29b; 30a, 30b, 30c) of the heat engine (2) are provided with dynamic gas seals (21) between the working chambers (20) to keep the fluid, which is in supercritical conditions, confined in a single working chamber (20) while it expands between the teeth (D) that form said working chamber (20); and the stages of the pump (5) are provided with dynamic gas seals (5b) between one stage and the other to keep the fluid, which is in supercritical conditions, confined to a single stage while it is compressed.

A Roots device may include a housing assembly having a first opening and a second opening in fluid communication with an interior cavity; a pair of identical rotors oppositely disposed within the housing interior cavity, each rotor of the pair having a longitudinal axis and a plurality of lobes, each lobe defining an end face extending between a first longitudinal side of the rotor lobe and a second longitudinal side of the rotor lobe; and a recessed port defined within the housing assembly and axially spaced from an end face of the rotor lobes, the recessed port in fluid communication with a first longitudinal side of one of the rotor lobes with a second longitudinal side of the rotor lobes such that the housing first opening is in fluid communication with the housing second opening. The apparatus may also be provided with an inlet nozzle structure in fluid communication with the first opening, the inlet nozzle tapering toward the first opening and configured such that a nozzle rate of working fluid through the nozzle is at least equal to a rotor engagement axial directing rate.

The utility model discloses a wet desulphurization process mixed water-saving type flue gas waste heat power generation system, and relates to the technical field of flue gas waste heat power generation. Comprising a desulfurizing tower, an intra-tower raw water spraying layer and an intra-tower water collecting disc are arranged on the upper portion in the desulfurizing tower, the intra-tower raw water spraying layer is arranged above the intra-tower water collecting disc and communicated with a raw water tank, the raw water tank is communicated with a condensate water storage tank and a raw water heating assembly through a three-way valve, the condensate water storage tank is communicated with the intra-tower water collecting disc, and the raw water heating assembly is communicated with the intra-tower water collecting disc. The raw water heating assembly is communicated with a power generation assembly through the cold end plate type heat exchanger, the power generation assembly is communicated with a raw flue gas heat removal assembly through the hot end plate type heat exchanger, and the raw flue gas heat removal assembly is communicated with the desulfurization tower. Flue gas in the desulfurization tower can be cooled through the raw water spraying layer in the tower, moisture in the flue gas is recycled through the water collecting disc in the tower, and the problem that water consumption is too high is solved; and flue gas waste heat is deeply recycled through the original flue gas heat removal assembly, and power is generated through the power generation assembly.

A rocker arm internal combustion engine is provided with a cylinder block, a fixed arm, a rotor, a rocker arm, and a cover, in which the rotor is attached to the inside of the cylinder block, the cylinder block is provided with a fixed arm, and the rotor is provided with a rocker arm, and the cylinder block, fixed arm, rotor, rocker arm, and cover form a combustion chamber, which is an enclosed space. [Means] The rocker arms sequentially enter the combustion chamber and seal it. The combustion chamber is provided with a spark plug, an oil outlet, and an air intake. The cylinder block or cover is provided with an exhaust port. The pressure in the combustion chamber drives the rocker arms to rotate the rotor. The rocker arm internal combustion engine may be used in place of a turbine in a hydroelectric power plant, or in the inner duct of a turbofan engine.

An internal combustion rotary engine comprising a housing, at least one sun wheel centered about the central axis and positioned within one of at least one cylindrical compartment of the housing, and including a sun wheel circumference and at least one semicylindrical receptable defined along the sun wheel circumference, at least one lobe extending from an inner cylindrical surface of the compartment, and at least one planet wheel received in the at least one semicylindrical receptable of the sun wheel. The at least one planet wheel may be configured to engage the inner cylindrical surface of the cylindrical compartment and include at least one indentation configured to be received by the at least one lobe when the at least one planet wheel rotates along the inner cylindrical surface. Air intake and compression as well as combustion and exhaust may be performed within the same or different compartments of the at least one cylindrical compartment.

The invention relates to the technical field of energy utilization, in particular to a distributed combined cooling heating and power system and a control method thereof. The system comprises a power generation circulation loop, a heating loop, an absorption type refrigeration loop and path switching valves, all the loops are connected through the path switching valves, the power generation circulation loop utilizes a screw expander to replace a turbine for power generation, the technical bottleneck of miniaturization of the combined cooling heating and power system is solved, meanwhile, the control method of the system is further provided, and the energy utilization rate is improved based on energy cascade application. Three system use modes are designed, the comprehensive energy utilization efficiency and the economic performance of the combined cooling heating and power system are improved, and energy conservation and emission reduction are achieved.

A Roots-type device can include a housing assembly having a first opening and a second opening in fluid communication with an internal cavity; a pair of identical rotors oppositely arranged within the housing internal cavity, each of the pair of rotors having a longitudinal axis and plurality of lobes, each of the lobes defining an end face extending between a first longitudinal side of the rotor lobe and a second longitudinal side of the rotor lobe; and a recess port defined within the housing assembly and being axially spaced from the end faces of the rotor lobes, the recess port placing the first longitudinal side of one of the rotor lobes in fluid communication with the second longitudinal side of the rotor lobe such that the housing first opening is placed in fluid communication with the housing second opening. The device can also be provided be provided with an inlet nozzle structure in fluid communication with the first opening, the inlet nozzle tapering towards the first opening and being configured such that a nozzle velocity of a working fluid passing through the nozzle is at least equal to the rotor mesh axial lead velocity.

The invention discloses a rotor of a high-pressure-ratio double-screw machine and the double-screw machine. Rotors of the screw machine comprise a female rotor and a male rotor, rack lines of the female rotor and the male rotor are formed by smoothly connecting nine sections of curves end to end, and the nine sections of curves sequentially comprise a circular arc section AB, a circular arc section BC, a circular arc section CD, an elliptic arc section DE, a parabolic arc section EF, a circular arc section FG, an elliptic arc section GH, a circular arc section HI and a circular arc section IJ. The nine-section tooth curve of the female rotor and the nine-section tooth curve of the male rotor are obtained by converting the nine-section curve on the rack line from a rack line coordinate system to a rotor coordinate system. According to the invention, the male rotor and the female rotor can be optimally meshed in the working process, two adjacent sections of tooth curves are in smooth transition at a connecting point, the rotor area utilization coefficient is relatively large, the contact line is relatively short, the leakage triangle is relatively small, and the molded line is streamlined, so that the working efficiency of the screw machine is improved.

An energy transfer machine includes a piston and cylinder. The piston can have a rocking motion as it enters and exits the cylinder, for example due to one being on a rotor and the other on a stator. The piston and cylinder form a primary chamber, and as they move relative to each other can form a seal separating the primary chamber into first and second sub-chambers which then unseals before the piston exits the cylinder. The first sub-chamber may reach a maximum geometric compression ratio, for example for the purpose of compression ignition, before the unsealing of the sub-chambers.

The invention relates to the technical field of power machinery, and particularly discloses a gear rocker arm steam turbine (gear steam turbine for short). Different from the inclination acting force of a connecting rod on a crankshaft in a traditional piston internal combustion engine and the inclination impact force of a working medium on blades in a steam turbine / gas turbine, through the unique rocker arm mechanism design, it is ensured that driving force generated by working of the working medium can be efficiently and directly transmitted to an output shaft all the time in the direction of directly acting on a rocker arm. According to the design, the decomposition loss of force is reduced to the maximum in principle, and the force transmission efficiency close to 100% can be achieved theoretically, so that a structural foundation is laid for achieving extremely high thermodynamic efficiency. The invention aims to provide a novel solution with high power density, high thermal efficiency and wide fuel adaptability for the field of power machinery. Successful application of the device is expected to replace part of traditional piston internal combustion engines, fuel cells and steam turbines in many energy conversion scenes, and a new technical path is provided for improving the energy utilization efficiency and reducing carbon emission.

The disclosure relates to a screw pump (2) comprising: a casing (3) with an inlet (30), an outlet (31) and a flow chamber (32) between the inlet and the outlet, and at least two screws (4, 5, 6) housed in the flow chamber to force a fluid flow 5 through the flow chamber from the inlet to the outlet, wherein each screw (4, 5, 6) comprises a release coupling (45, 52, 62) to restrict, when in use, the rotation of the screw when it is being extracted from a molding tool.

A high-order spiral combined twisted lobe Roots rotor, compressor and expander. The rotor includes a female rotor and a male rotor with the same profile structure. The two rotors can achieve continuous and correct meshing during the meshing process of reverse rotation. The tooth profile A1B1C1D1E1 of a single tooth of one rotor is composed of a spiral envelope line segment A1B1, a spiral line segment B1C1, a spiral line segment C1D1 and a spiral envelope line segment D1E1 connected in sequence. The complete rotor profile is formed by rotating the single-tooth profile A1B1C1D1E1 around the origin of its rotor profile by #imgabs0# and then connecting the head and tail with the single-tooth profile A1B1C1D1E1. z represents the number of teeth of different rotor profiles. The rotor profile of the present invention has five adjustable profile parameters, including the spiral order, the number of rotor teeth, the rotor center distance and two profile geometric parameters, and has a greater optimization space in terms of profile design and adaptability; according to the needs of the design working conditions, the shape of the rotor profile can be flexibly adjusted to improve the volumetric efficiency, energy-saving performance and dynamic characteristics.

A fixed vane positive displacement rotary device is disclosed that includes a primary rotor and one or more scavenging rotors rotatably disposed in a rotor encasement. The primary rotor includes a plurality of protrusions. And each of the scavenging rotors includes a first curved surface that is configured to move adjacent to the primary rotor between the protrusions as the primary rotor and scavenging rotors rotate, a protrusion-receiving groove extending that is configured to receive one of the plurality of protrusions therein so that at least a tip of that protrusion moves adjacent to the protrusion-receiving groove as the primary rotor and scavenging rotors rotate, and a second curved surface and a third curved surface extending away from a center of the protrusion-receiving groove on opposing sides of the protrusion-receiving groove that are configured to move adjacent to a leading side and a trailing side of the one protrusion, respectively.

Satellite pump whose body is divided into at least two parts constituting bodies, characterized in that, in the rear body (3) there is a suction duct (KS) placed coaxially with the rear body (3), at least two inner ducts (KW) routed throughout the whole length of the rear body (3) and ring duct (KP) routed in the rear body (3) adjacent to the rear compensation plate (6) and coaxially with the shaft (7). The invention also comprises a ring-shaped compensation chamber (KK) which is adjacent to the rear compensation plate, while the suction duct's (KS) has diameter not larger than the inner diameter of the central body (2) both in the case when the front body (1) and the central body (2) constitute one part, and in the case when the front body (1) and the central body (2) constitute two separate parts and moreover. The inner ducts (KW) connect the suction duct (KS) with the ring duct (KP) and the ring duct (KP) is connected with the suction holes routed in the rear compensation plate (6).

The present application relates to an internal combustion engine operating on the rotary principle, wherein at least one piston rotates on a circular piston path within an annular cylinder chamber bounded by a cylinder wall, passing through various zones of the cylinder chamber. On one full revolution of the internal combustion engine, corresponding to a complete rotation of the piston on its piston path (360°), an air-fuel mixture is ignited behind the piston in a combustion zone of the cylinder chamber. Later, during the same revolution, air located in front of the piston is compressed by the piston in a compression zone of the cylinder chamber. The compressed air is drawn into the piston and transported by the piston along its path into the combustion zone. There, the compressed air is discharged from the piston into the combustion zone and used to form the air-fuel mixture.

A device for controlling torques arising in a mechanical system, comprising: first and second terminals couplable respectively with first and second parts of the mechanical system; coupled to the first terminal, a housing enclosing a chamber for containing a fluid; coupled to the second terminal, a shaft rotatably coupled to the housing; a rotor coupled to the shaft; and a fluid path coupled to the chamber; wherein the device is configured such that, when in use: the fluid is caused to flow along the fluid path in response to relative rotational motion between the first and second terminals, thereby generating an inertial force due to the mass of the fluid, and the inertial force causes equal and opposite inertance torques to be applied at the first and second terminals respectively, the inertance torques being torques whose magnitude are substantially proportional to the relative rotational acceleration between the first and second terminals.

A vane pump (1) for handling fluids, comprising: - a containment body (2) defining a suction line (3), a feed line (4) and a containment volume (5) interposed between said suction line (3) and said feed line (4), - a rotor (6) arranged within said containment volume (5) and comprising at least two vanes (7) defining volumes of fluid for handling said fluid, - and an assembly of fixed elements (8) interposed between said containment volume (5) and said rotor (6). The vane pump further comprises at least one interference element (9) interposed between said containment body (2) and said assembly of fixed elements (8) and housed, at least partially, in said containment body (2) and / or in said assembly of fixed elements (8), and said interference element (9) is housed, at least partially, in said suction line (3) and / or in said feed line (4).