41results about How to "Low lubrication requirements" patented technology

The present invention relates to a pulse detonation rotor shaft engine. In the technical proposal, the pulse detonation rotor shaft engine mainly consists of a pulse detonation engine, a rotor and an output shaft; propulsive gas with the high temperature and high pressure expansion of pulse which is ejected when the pulse detonation engine works is used as a power source to push the rotor to rotate; the rotor drives the output shaft to rotate; a pulse detonation rotor shaft engine uses the output shaft to output most energy produced by the pulse detonation engine by outputting torsion continuously; the output shaft drives various kinds of loads to work. The pulse detonation rotor shaft engine has the beneficial effects as follows: firstly, the pulse detonation rotor shaft engine can be used as a shaft engine to be widely applied in various kinds of dynamic systems, such as ship, submarine, tank, tractor, automobile, train, and the like and has wide purposes; secondly, the pulse detonation rotor shaft engine overcomes the disadvantage of the large noise of the prior pulse detonation engine; thirdly, compared with a piston type engine, the pulse detonation rotor shaft engine has the obvious advantages of simple structure, low cost, high reliability, long service life, light weight, less fraction resistance loss, etc.

The invention discloses a fracturing pump system and a fracturing truck. In the fracturing pump system, a first conveying mechanism and a second conveying mechanism comprise oil cylinders, supercharging cylinders and distribution valves. Each distribution valve comprises a first channel, a second channel and a third channel, wherein the first ends of the first channel, the second channel and the third channel are connected, a suction valve is arranged in the second channel, and a discharge valve is arranged in the third channel. Plug bodies are arranged at the extending end of piston rods of the oil cylinders and movably arranged in the supercharging cylinders, and outlets of the supercharging cylinders are connected with the second end of the first channel. An engine is used for driving an oil pump. A control valve group is used for controlling oil inlet and return states of the oil cylinders. By using the fracturing pump system, a stroke can be effectively increased, stoke times can be decreased, the service life of easily damaged parts can be prolonged, an output pressure and flow coverage range can be effectively widened, the structural complexity can be effectively reduced, the cost can be saved, and the lubrication and cooling requirements can be effectively reduced.

The invention discloses a sliding device, in particular a slide guide rail rolling and unloading device for machine tool equipment. The device comprises a guide rail and a slide seat (1) which is positioned on the guide rail and can slide relative to the guide rail, and is characterized in that: at least three positions matched with the guide rail on the bottom surface of the slide seat (1) are provided with roller wheels (6), and the circumferential lateral surfaces of the roller wheels (6) are contacted with the upper surface of the guide rail positioned under the slide seat (1). In the device, as the slide seat and the guide rail do not directly contact, are supported by the roller wheel, and slide, the device realizes line contact of the roller wheel and the guide rail, greatly reduces the mutual friction area, reduces moving resistance, saves energy and lowers the requirement on lubrication compared with a sliding mode of surface contact.

The invention discloses an external combustion engine and a transmission mechanism thereof. The external combustion engine comprises two groups of hot gas components, a transmission mechanism and a crank shaft, wherein each group of the hot gas components comprises a gas cylinder, a heater, a reheater and a cooler; a power piston replacement piston is arranged in the gas cylinder, and a cold cavity and a hot cavity are formed in the gas cylinder; the transmission mechanism comprises a connecting rod group and a swing rod group; the swing rod group comprises a center swing rod and edge swing rods; piston rods are hinged at two ends of the swing rod group respectively; a plane on which the center swing rod is placed and the planes on which the edge swing rods are placed are parallel to each other and coaxial with each other on a pivot shaft; the connecting rod group is surrounded by four connecting rods which are hinged between the pivot shaft and a crank shaft connecting rod neck; the first connecting rod and the second connecting rod are as long as each other and keep complementary angles from 30 to 60 degrees with the center swing rod and the edge swing rods; the third connecting rod and the fourth connecting rod are as long as each other, and the upper ends of the third connecting rod and the fourth connecting rod are hinged with each other; and a heat source heats the heater so that gas in a gas channel is expanded and contracted due to a reciprocating motion between a cold cavity and a hot cavity, and the crank shaft is driven by the transmission mechanism to do a periodic motion and work. The external combustion engine is easy to start and has low cost.

The invention discloses a variable gas distribution phase mechanism for an opposed-piston engine, and belongs to the technical field of internal combustion engine structures. The variable gas distribution phase mechanism comprises an air cylinder sleeve, an air inlet slide sleeve, an air outlet slide sleeve, an air inlet connecting rod, an air outlet connecting rod and an adjustable crank, wherein the air cylinder sleeve is provided with a plurality of layers of air ports; the number of the air port layers on the air cylinder sleeve corresponds to the relevant engine rotation speed, namely the air port adjusting type is adjusted by different shifts. The variable gas distribution phase mechanism consists of two crank slide block mechanisms in series; the adjustable crank is adjusted to drive the slide sleeves to move under the actions of the air inlet connecting rod and the air outlet connecting rod, so as to switch the number of air port layers in different shifts. The variable gas distribution phase mechanism has the advantages that the average effective pressure and the gas changing characteristic of the opposed-piston engine can reach the optimum state under various working conditions; the cost is reduced, and the system reliability is improved.

The invention discloses a planetary roller bearing, relates to the field of mechanical bearings, in particular to a high-speed precise heavy-duty bearing. Two sets of planetary gears are utilized for replacing an ordinary rolling bearing retainer, and the problems that according to the ordinary bearing retainer, due to the fact that the retainer is rubbed and abraded during high-speed running, a rolling body bounces and deviates from the rolling direction, heating of a bearing is intensified, the load is low, and even the bearing is in failure are solved. The planetary roller bearing is the precise heavy-duty bearing high in rotating speed and efficiency, long in service life and high in stability, the lubricating requirement is lower than that of a conventional bearing, and the maintaining cost is low.

The invention discloses a motor type active transverse stabilizer bar. The motor type active transverse stabilizer bar comprises an L-shaped left bar (1), an L-shaped right bar (2), a transmission mechanism (3) and a motor (5), wherein the motor (5) is used for driving an output shaft of the transmission mechanism (3) to move through a shaft coupler (4); a lower swinging arm (21) which is movably connected with the output shaft of the transmission mechanism (3) is fixedly arranged at the left end of the right bar (2); and when the output shaft of the transmission mechanism (3) moves, the lower swinging arm (21) drives a free end of the right bar (2) to swing, so as to provide a balance force. The motor type active transverse stabilizer bar disclosed by the invention has the advantages of simple structure, low cost and convenience for maintenance and installation.

The invention relates to a multi-thread twisting spindle (1) for yarn twisting machines. The multi-thread twisting spindle includes an upper rotor (10) and a lower rotor (14), which rotate concentrically in opposite directions, wherein one of the rotors (10, 14) is driven and transmits the movement to the other rotor (10, 14) by means of a transmission device (20). According to the invention, the movement between the driven rotor (10, 14) and a transmission device output rotor (10, 14) is transmitted via at least one thrust bearing (27) and at least one radial bearing (26), wherein a cage (25) arranged in the thrust bearing (27) is present which is secured against rotation.

The invention discloses a sliding piece type compressor with a cylinder rotating with a rotor. The sliding piece type compressor with the cylinder rotating with the rotor includes a cylindrical machine shell, wherein a pneumatic cylinder is arranged in the cylindrical machine shell and is coaxial with the cylindrical machine shell. The rotor is arranged in the pneumatic cylinder and is arranged eccentrically with the pneumatic cylinder, and an air inlet and an air outlet are formed in the left end surface of the machine shell. The air inlet and the air outlet are correspondingly located in a position changed from being small to being big and a position change from being big to being small along the direction of the rotor rotation, the positions are located in crescent shaped clearance areas between the pneumatic cylinder and the rotor. More than eight even numbered axial rectangular grooves are evenly formed in the rotor, and at least two radial through holes are formed in the rectangular grooves. A sliding piece is embedded in the rectangular grooves, and one wide sliding piece is embedded in the inner wall of the pneumatic cylinder. The rest of the sliding pieces abut against theinner wall of the pneumatic cylinder under the action of a compression spring. The compressor has the advantages of small friction loss and high efficiency because the pneumatic cylinder rotates along the compressor.

A retarder arrangement (1) is disclosed configured to brake rotation of a shaft (3) of a vehicle (5). The retarder arrangement (1) comprises a retarder rotor (7), a retarder transmission (9), a lubricant feed conduit (11) arranged to conduct lubricant to the retarder transmission (9), a coupling device (13), and an actuator element (15). The actuator element (15) is moveable between an actuated position and an unactuated position to move the coupling device (13) between an engaged state and a disengaged state. The coupling device (13) is configured to, in the engaged state, connect the retarder rotor (7) to the shaft (3) via the retarder transmission (9), and in the disengaged state, disconnect the retarder rotor (7) from the shaft (3). The lubricant feed conduit (11) comprises a valve (17) mechanically connected to the actuator element (15). The present disclosure further relates to a transmission arrangement (40), a power train (50), and a vehicle (5).

The invention discloses an external combustion engine and a transmission mechanism thereof. The transmission mechanism of the external combustion engine comprises a connecting rod group and an oscillating rod group, wherein the connecting rod group includes a first connecting rod and a second connecting rod, the upper ends of the first connecting rod and the second connecting rod are hinged to a connecting rod neck of a crankshaft of the external combustion, the oscillating rod group includes a central oscillating rod and two side oscillating rods, the two side oscillating rods are symmetrically arranged on two sides of the central oscillating rod, the oscillating plane of the central oscillating rod is parallel to the oscillating planes of the two side oscillating rods, and the central oscillating rod and the side oscillating rods are coaxial with a pivot. The central oscillating rod is provided with a first hinge point and a second hinge point which are used for hinging a piston rod of a replacement piston, and the distance between the first hinge point and the pivot is equal to that between the second hinge point and the pivot. The side oscillating rods are respectively provided with a third hinge point and a fourth hinge point which are used for hinge a piston rod of a power piston, and the distance between the third hinge point and the pivot is equal to that between the fourth hinge point and the pivot. The lower end of the second connecting rod is hinged to a fifth hinge point, on the first side of the pivot, of the side oscillating rods, and the lower end of the first connecting rod is hinged to a sixth hinge point, on the second side of the pivot, of the side oscillating rods. By the transmission mechanism of the external combustion engine, distance between two air cylinders can be shortened.

The invention discloses a positive displacement air compressor with a folded blade type swing mechanism. The swing mechanism comprises a columnar rotor, folded blades and supporting sliding blocks. Folded blade placing grooves are axially formed in the outer side wall of the columnar rotor. The folded blades are arc-shaped blades, and the radian of the inner side faces of the folded blades is matched with the radian of the folded blade placing grooves. The supporting sliding blocks are arranged at the two ends of each folded blade placing groove correspondingly. The two side edges of each folded blade are hinged to the columnar rotor and the supporting sliding blocks correspondingly. The supporting sliding blocks are embedded into rotary sliding rings which are coaxial with a working cavity through embedding grooves. End caps are arranged at the two ends of the working cavity. An eccentric bearing is arranged in the center of each end cap. Supporting shafts are arranged at the two ends of the columnar rotor. The swing mechanism is inserted into the working cavity to make the supporting shafts penetrate through the rotary sliding rings to be fixed to the eccentric bearings in the centers of the end caps in an inserted mode. According to the positive displacement air compressor, through the structural design of the swing mechanism, the columnar rotor and the supporting sliding blocks are in a non-concentric rotation state during rotation, and the purposes of inlet-air compression and exhausting are achieved by forming a changeable volume cavity in a stator shell.

The invention relates to a field of a linkage mechanism for vehicle doors and a body frame, and provides a simple and stable three-dimensional hinge system for the vehicle doors which occupies less space and adapts to all kinds of vehicle. This invention includes the body frame and vehicle doors, which are hinged to the doorframe of the body frame. The invention also includes a master connecting lever that comprises a first end that connects to the doorframe and a second end that connects to the inside of the door, a articulated connecting lever that comprises a first end that connects to thebody frame and a second end that connects to the door.

The invention relates to a method for controlling the oil level (h3) in a differential gearbox of a vehicle having an oil sump (3) and an oil reservoir (4) pneumatically separated from the oil sump (3). The oil reservoir (4) is connected to the oil sump (3) through at least one oil passage (34), and the oil sump (3) is connected to a pneumatic pressure source (8) through at least one control valve (7) and an air line (5), wherein In at least one position (B) of the control valve (7), the pressure source (8) is pneumatically connected to the oil sump (3). To improve efficiency, at least one first characteristic operating parameter of the vehicle is detected according to the invention and the control valve (7) is operated at least according to said first characteristic operating parameter, wherein vehicle speed (v) is selected as the first characteristic operating parameter.