531results about "Casings" patented technology

The invention belongs to the technical field of material processing, and discloses a magnesium alloy casting semi-solid injection molding method and application, and the method comprises the following steps: checking and adjusting a semi-solid injection machine, a casting mold and other equipment to be in a normal state, and placing magnesium alloy particles in a designated area of a hopper; putting a long nozzle of the semi-solid injection platform into the center of a mold sprue; setting the temperature of each section of a mold temperature controller, a charging barrel and a nozzle; preserving heat for a period of time after the temperature of the charging barrel reaches a set value, so that the temperature of materials in the charging barrel is uniform; setting the injection rate, the cooling time, the material return distance and the melt pressure of the semi-solid injection machine; and after a release agent is quantitatively sprayed to the mold, a semi-solid injection program is started, and a casting is obtained. The AS41B magnesium alloy particles with good heat resistance are adopted as the raw material, the semi-solid injection molding method is combined, a melting furnace is not needed, only heating to the semi-solid state is needed, the melt temperature is low, energy is saved, the service life of a mold is prolonged, protective gas is not needed, and the manufactured casting is good in mechanical property and high in heat resistance.

A preparation method of porous hafnium carbide superhigh-temperature ceramic is characterized by comprising the following steps: dispersing graphene oxide in a solvent to form a graphene oxide dispersion liquid, mixing a monomer hafnium source solution with the graphene oxide dispersion liquid, and carrying out hydrothermal treatment on a hafnium oxide carbon precursor network structure to obtain the porous hafnium carbide superhigh-temperature ceramic. The organic-inorganic hybrid precursor is subjected to two-stage heat treatment, the first stage is inorganic treatment, the second stage is carbon thermal reduction reaction, and the porous hafnium carbide ultrahigh-temperature ceramic material is obtained. Graphene oxide is used as a structure-directing agent and an in-situ carbon source, a monomer hafnium source is uniformly anchored on the surface of a GO sheet layer on the molecular scale, an organic-inorganic hybrid precursor is formed, after the precursor is subjected to hydrothermal crosslinking, Hf species and a carbon skeleton are highly mixed on the nanoscale, and the Hf / GO composite material is obtained. And the subsequent carbon thermal reduction reaction can be efficiently completed in a low-temperature interval of 1300-1450 DEG C.

The application discloses a kind of air-cooled diesel generating set, specifically relates to the technical field of generator, including base, the diesel generating equipment is slidably connected with the upper end of base by slide rail, the fan in the dustproof dehumidification structure inner cavity is fixedly connected with the output rotor front end of diesel generating equipment, the inner surface of shielding box is provided with air duct structure, and the dustproof dehumidification structure is provided in the front of the inner surface of shielding box.The air-cooled diesel generating set of the application is removed by setting dehumidification component for removing moisture in inhaled air, reduce the corrosion of moisture to internal parts;Further, dust and particles in inhaled air are separated by the action of dust removal component, the entry of large-particle dust is reduced, dust on the cooling fin can also be periodically cleaned by automatic cleaning in dust removal component, to ensure the air intake;Air flow efficiency is improved by the action of air duct structure, the heat dissipation area is increased, the heat dissipation effect is enhanced, and the performance decline and safety hazards caused by overheating are avoided.

The invention relates to the technical field of oil cylinder detection, and discloses a movable engine unit protection mute shell and an engine unit, the movable engine unit protection mute shell comprises a cabinet body, a door body is arranged on the front side of the cabinet body, a mute plate is embedded in the inner wall of the cabinet body, an electric sliding rail is arranged in the cabinet body, and a sliding plate is slidably connected to the upper side of the electric sliding rail; a diesel engine unit is fixedly installed on the upper surface of the sliding plate, a cooling mechanism is arranged in the cabinet body, a heat exchange pipe is filled with cooling liquid, when the diesel engine unit works, generated heat enables the cabinet body to be filled with high-temperature gas, and at the moment, the cooling liquid in the heat exchange pipe and the high-temperature gas in the cabinet body generate a heat exchange effect; the temperature in the cabinet body is reduced, heat in the cabinet body is eliminated, and the technical problems that an existing generator set can generate some heat in the working process, and if the heat in the closed cabinet body cannot be eliminated, the heat can damage the cabinet body and generator set equipment are solved.

The invention belongs to the technical field of piston engines, and particularly relates to a variable-volume crankcase which is integrated with a deformable and automatically-recoverable device, a variable-volume cavity is formed in the crankcase through a deformable or slidable diaphragm, and particularly, an elastic reset element is arranged in the upper surface of the device, so that the variable-volume cavity is formed in the crankcase. It is ensured that the diaphragm can stably and regularly move and reset after deforming or sliding; power for deformation or sliding of the diaphragm comes from periodical extrusion of an engine crank to the diaphragm, by correctly matching a volume change curve of the crankcase with an air distribution phase, the volume of the crankcase is enlarged during air inlet, so that negative pressure in the crankcase is increased, the volume of the crankcase is reduced during scavenging, pressure in the crankcase is increased, and the service life of the crankcase is prolonged. The technical problems of insufficient air intake, low scavenging efficiency, power attenuation and the like of a two-stroke piston engine under the low air pressure condition are solved, and a feasible solution is provided for power improvement of a small aero-engine and power recovery in a high-altitude environment.

The utility model discloses an engine cover convenient to pre-fix, which comprises a cover plate, a stabilizing assembly is arranged on the cover plate, the stabilizing assembly comprises a reinforcing plate, a connecting block, a fixing bolt, a filling hole, a circulating hole and a stabilizing hole, the reinforcing plate is detachably arranged on the inner side of the cover plate, the connecting block is arranged on the reinforcing plate, and the fixing bolt is arranged on the connecting block. The fixing bolt is detachably installed between the connecting block and the cover plate, the filling hole is formed in the top of the cover plate, the circulating holes are evenly formed in the middle of the top of the cover plate, the stabilizing hole is formed in the side end of the cover plate, a disassembling assembly is arranged on the cover plate, and the disassembling assembly comprises an installing rod, an installing sleeve and a rotating sleeve. The mounting rod penetrates through the cover plate, the mounting sleeve is connected to the mounting rod in a sliding mode, and the bottom of the mounting sleeve is tightly attached to the top of the cover plate, so that the technical problem that in the background technology, an existing engine cover is obviously unstable in the fixing process is solved.

The utility model relates to the technical field of automobile accessories, in particular to an automobile valve chamber cover which comprises a cover body, an oil-gas separation cover and a protective buckle cover, an installation area is arranged on the cover body, and a backflow hole and an oil-gas outlet are formed in the installation area. The oil-gas separation cover is buckled on the mounting area and forms an oil-gas cavity and a waste gas transition cavity which are mutually independent, the oil-gas separation cover is provided with a waste gas discharge port and at least one oil-gas inlet, and the oil-gas inlet and the oil-gas outlet are both communicated with the oil-gas cavity; the protection buckle cover is buckled on the oil-gas separation cover, the backflow hole and the waste gas discharging opening are both communicated with the waste gas transition cavity, and a waste gas valve is arranged in the waste gas discharging opening. The automobile valve chamber cover adopts a split design and is convenient to manufacture and low in replacement cost.

The present invention addresses the problem of providing, in a state ensuring high strength, a cover responsible for the protection and noise insulation of a crank pulley, auxiliary drive belt, etc., in a longitudinal engine in which a crankshaft is disposed facing toward the front of the vehicle body. This cover 30 includes a sound absorbing body 33 made of a material such as hard urethane, and a hard reinforcing body 34 in which the sound absorbing body is insert-molded, the cover being formed in a tray shape as a whole. Fastening parts 35-38 fixed to the engine by bolts are provided to outer ends of the reinforcing body 34. Since the pressing force from the bolts does not directly affect the sound absorbing body 33, high fastening strength can be achieved while ensuring a high protection function and sound insulation function.

An internal combustion engine (10) includes a one-piece cylinder block casting (12), a flywheel (24) supported for rotation at a front block end (20), and a back gear train (30) supported for rotation at a back block end (22). Cast-in pump inlet and outlet passages (58,60) are formed in the cylinder block casting (12) and open in a pump mounting face (50) at the back block end (22). An oil pump (52) is clamped to the pump mounting face (50) and includes a pump inlet (54) and a pump outlet (56) fluidly connected, respectively, to the cast-in pump inlet passage (58) and the cast-in pump outlet passage (60).

The invention discloses a crankcase reinforcing plate device which comprises a reinforcing plate, a plurality of lower grooves are formed in the reinforcing plate, and an oil return hole is formed in the center of each lower groove; and the receding surfaces are arranged on the two sides of the oil return hole and used for receding the movement envelope. According to the crankcase reinforcing plate device, the reinforcing plate is arranged, the strength of a crankcase is improved, the lower groove is formed, when a vehicle inclines, part of engine oil is left in the lower groove, it is guaranteed that the engine oil is stably pumped into an engine oil pump to lubricate engine parts, engine oil loss can be prevented, and the service life of the engine oil is prolonged. The reinforcing plate can be used for damping and separation, so that the part of engine oil is effectively prevented from flowing away from an oil suction port area too fast and too much, part of engine oil is trapped near the oil suction port, the lowest oil level state is maintained, and the reinforcing plate can also be used for damping and separation, so that the overall shaking amplitude and splashing height of oil in the oil pan are reduced; relative stability of the oil surface in the oil suction port area is kept, and air is prevented from being mixed into engine oil to form foam.

Device for cooling a vehicle engine, comprising: a combustion chamber in which a piston moves back and forth; Water jackets (16a, 16b) through which a coolant flows to cool the combustion chamber; and a cylinder block (1) which forms a frame of the vehicle engine, wherein the cylinder block (1) comprises: a cylinder block body (10) in which the combustion chamber is formed, and an exhaust gas recirculation (EGR) cooler (30) which is mounted in the cylinder block body (10) in such a way that the EGR cooler (30) exchanges heat with a coolant discharged from the combustion chamber, wherein the cylinder block body (10) is provided with an EGR cooler insertion section (20) to which a coolant from the combustion chamber is supplied and in which the EGR cooler (30) is inserted, wherein the EGR cooler (30) is provided with a gas pipe (36) in which an exhaust gas flows, wherein the exhaust gas of the gas pipe (36) is cooled by a coolant which is supplied to the EGR cooler insertion section (20), wherein a supply opening (12) is configured to supply a coolant to the EGR cooler insertion section (20) in which cylinder block body (10) is formed, wherein the cylinder block body (10) has a plurality of cylinder chambers (18), wherein the water jackets (16a, 16b) have a circulation flow channel (16b) configured to exchange heat with all cylinder chambers (18) and a direct flow channel (16a) configured to exchange heat with one of the cylinder chambers (18), wherein the feed opening (12) is formed at a point where the circulation flow channel (16b) and the direct flow channel (16a) meet, wherein the water jackets (16a, 16b) have an arc shape which encloses the outer circumferences of the cylindrical chambers (18), and wherein the EGR cooler insertion section (20) is designed such that it extends horizontally in the longitudinal direction of the cylinder block body (10).

A cover assembly for an engine includes a gear plate. The gear plate includes a plate body defining an opening, and a plate wall contiguous with the plate body along the opening and extending at a first angle away from the plate body. The cover assembly also includes a cover including a cover rim contacting the plate body along the opening and a cover body positioned adjacent to the plate wall and defining a groove. The groove is defined by a first groove surface, a second groove surface positioned a distance away from the first groove surface, and a third groove surface extending at a second angle from the first groove surface to the second groove surface. The cover assembly also includes a sealing member positioned in the groove and contacting the plate wall.

The application discloses a V-type diesel engine body structure, which comprises a body, at least two camshaft holes, a main oil passage for providing lubricating oil for the camshaft in the camshaft hole, two water distribution passages and two water collecting passages, the two water collecting passages are connected with water outlets at the front end of the body respectively, camshaft chambers are arranged on both sides of the camshaft hole on the body, the camshaft chambers are connected with lower cooling cavities of cylinder sleeves through splash oil and oil gas inlets, the lower cooling cavities of the cylinder sleeves are connected with crankcase cavities through splash oil return gaps, and the camshaft chambers are connected with the crankcase cavities. The structure of the application is divided into upper and lower parts for cooling, and the upper part is cooled by cooling liquid; since the lower part of the cylinder sleeve has small thermal load, the structure of the application uses non-forced cooling, splash oil and oil gas splashed by rotation of camshaft bearings are used to cool the lower part of the cylinder sleeve in a small amount, so that appropriate benefits are achieved, and excessive cooling to cause engine heat loss is avoided.

The present invention suppresses suction of gas from a suction passage. An internal combustion engine (10) for a vehicle is provided with a cylinder (23A), an intake passage (10A), a crank chamber (10Z), a suction passage (80Z), and an introduction passage (60Z). The intake passage (10A) introduces intake air into the cylinder (23A). The crankshaft chamber (10Z) accommodates a crankshaft (33). In addition, oil is stored in the crank chamber (10Z). The suction passage (80Z) sucks oil stored in the crank chamber (10Z). The introduction passage (60Z) introduces a portion of the intake air flowing through the intake passage (10A) into the crank chamber (10Z). The introduction passage (60Z) includes a main passage (63Z) and a plurality of outlet passages (64Z). The main passage (63Z) extends from the outside of the crank chamber (10Z) to the inside of the crank chamber (10Z). The outlet passage (64Z) discharges intake air flowing through the main passage (63Z). The outlet passage (64Z) extends from the main passage (63Z) toward the suction passage (80Z) when viewed from a direction along the vertical axis of the vehicle.

The utility model relates to the technical field of automobile engine parts, and discloses an automobile engine bearing cover structure which comprises an outer shell, a plurality of oil storage shells are arranged on the surface of the outer shell, oil injection ports are formed in the surfaces of the oil storage shells, a plurality of oil outlet holes are formed in the surfaces of the oil storage shells, and the oil outlet holes are communicated with the oil storage shells. Piezoelectric ceramic vibrating pieces are arranged on the two sides of an inner cavity of the oil storage shell correspondingly, and the impurity removing mechanism is matched with the piezoelectric ceramic vibrating pieces to treat oil impurities. When the device is used for adding lubricating oil, the oil filling port can be conveniently exposed under the action of the covering mechanism, so that the purpose of adding the lubricating oil is achieved, and under the arrangement of the covering mechanism, the connection between the covering mechanism and the oil filling port is improved, the possibility of loosening caused by vibration is reduced, and the service life of the device is prolonged. And in addition, under the action of an impurity removal mechanism, a worker can conveniently clean impurities in the inner cavity of the oil storage shell, and the practicability of the device is improved.

The application discloses an engine and a motorcycle adopting the engine. The engine comprises a shell part, a bolt fastener and a sealing washer. The bolt fastener is arranged in the sealing washer and connected with the shell part. The sealing washer comprises a sealing hole for the bolt fastener. A convex part capable of being elastically deformed is formed on the inner wall of the sealing hole. The convex part makes the inner diameter of the sealing hole smaller than the diameter of the bolt fastener. Through the above arrangement, the assembly efficiency of the bolt fastener can be improved.

This utility model discloses a vibration damping structure for an engine front cover, including an outer shell. A vibration damping turbine is installed inside the outer shell, and the turbine is connected to the outer shell via vibration damping bolts. A sealing cover is installed on one side surface of the turbine, and a sealing front cover is detachably installed on the side surface of the sealing cover. A cooling impeller is installed between the vibration damping turbine and the outer shell. This utility model provides convenient sealing and assembly of the engine front cover components, using vibration damping bolts to connect and align the various cover shells. It offers advantages such as good sealing and a tight, stable connection, effectively preventing the shell from loosening due to significant engine vibration during operation. Simultaneously, the internal and external heat dissipation design of the shell allows for rapid heat dissipation from the engine, providing excellent cooling performance. The planetary gear transmission mechanism integrated into the end cover shell, combined with an eccentric wheel structure, effectively reduces vibration at the shaft end.

An internal combustion engine 10 having a cylinder block 11 in which a plurality of cylinders 12 is arranged and a crankshaft (27, Fig. 2); At least one first cylinder 12a is centred relative to the crankshaft axis (ZZ, Fig. 2) such that its longitudinal axis (VV, Fig. 2) is perpendicular to the crankshaft axis and at least one second cylinder 12b is offset relative to the crankshaft axis (ZZ, Fig; 2) such that its longitudinal axis (WW, Fig. 3) is laterally offset from a plane defined by the crankshaft axis (ZZ, Fig. 2) and the longitudinal axis of the first cylinder (VV, Fig. 2). The invention aims to reduce friction in an engine that may deactivate cylinders in use.

The utility model discloses a motorcycle engine cover, which relates to the field of engine covers and comprises an engine body, a cover is arranged on the engine body, a first fixing component matched with the cover is arranged on the outer wall of the engine body, and a second fixing component is arranged on the cover. A butt joint groove is aligned with a second mounting block, then the machine cover is rotated, so that a first mounting block slides in a sliding groove, fixation is completed, on the contrary, the machine cover needs to be rotated to rotate the butt joint groove to the position of the second mounting block, the machine cover can be disassembled, through a second fixing assembly, the machine cover is conveniently fixed, and two clamping grooves form dislocation; the knob is pushed to enable the sliding rod to drive the clamping block to move downwards to enter the first clamping groove, when the clamping block penetrates through the first clamping groove to reach the second clamping groove, the knob is rotated to enable the clamping block to rotate, the clamping block moves upwards under the action of the elastic piece and is blocked by the first clamping groove, and fixing is completed.

The invention relates to an assembly comprising a heat engine equipped with a cylinder head (2) covered by a cylinder-head cover (4), which between them receive at least one camshaft having, on one side, a joining edge parallel to its axis, which is formed between two flat surfaces, and comprising a tool for adjusting the rotation of the camshaft, which tool fits into a bore in the cylinder-head cover, the adjustment tool comprising an attachment part (20) for attachment to the cylinder-head cover (4), and an independent rod comprising, at its end, a notch having two bearing faces which, in the fixed position of the tool, bear on the two surfaces of the camshaft on either side of the edge.

An engine includes a block that includes a block cylinder, a block passage configured to receive a head bolt, and a block fluid passage. The engine also includes a deck extender coupled to the block, and the deck extender includes a deck cylinder configured to align with the block cylinder, a deck passage configured to align with the block passage, and a deck fluid passage configured to align with the block fluid passage. The engine further includes a cylinder liner coupled to the block and the deck extender via the block cylinder and the deck cylinder, and the cylinder liner includes a contiguous cylinder wall to form an engine cylinder. Moreover, the engine includes a cylinder head configured to couple to the deck extender.

The application discloses an engine assembly, a power system and a vehicle, relates to the technical field of vehicles, and aims to solve the problem of how to improve the space utilization of a vehicle. The engine assembly comprises an engine body tail gas treatment device, the engine body comprises an exhaust port; the tail gas treatment device is communicated with the exhaust port and is used for treating exhaust gas generated by the engine body, and the tail gas treatment device is arranged on the side of the engine body facing the vehicle head.

This application provides an engine cylinder block assembly, an engine, and a vehicle. The engine cylinder block assembly includes a cylinder block portion and a crankcase, wherein the cylinder block portion and the crankcase are integrally formed or fixedly connected. The side walls of the cylinder block portion and the crankcase have oil return channels that connect the cylinder head side of the cylinder block portion to the oil pan side of the crankcase. The side wall of the oil return channel has a first opening, and the side wall of the crankcase also has an oil return labyrinth that communicates with both the first opening and the inner cavity of the crankcase. The oil return labyrinth is configured to allow oil to flow through the labyrinth into the inner cavity of the crankcase when the oil level in the oil return channel exceeds a first threshold, and to prevent oil from entering the inner cavity of the crankcase when the oil level in the oil return channel is less than or equal to the first threshold. This engine cylinder block assembly ensures rapid oil return even when the engine is tilted at a large angle, preventing poor lubrication.

The application discloses a motorcycle engine mounting structure, which separates the crankcase of the engine from the transmission case, fixes the crankcase and the cylinder head on the frame, connects the transmission case with the crankcase through a first bearing to form a rotary connection relationship, connects the rear end of the transmission case to the frame through a rear shock absorber, and enables the whole transmission case and the rear wheel to rotate around the crankshaft center of the crankcase, so that the riding vibration and the engine shaking can be reduced and alleviated by the rear shock absorber, the vibration is prevented from being directly transmitted to the vehicle body, and the riding comfort of the user can be improved. In addition, the first bearing, the first shaft sleeve, the compression nut and the retainer ring are combined to limit the axial movement of the bearing, ensure that the bearing and the shaft sleeve are not separated, and ensure that the transmission case stably rotates around the crankshaft center of the crankcase. The axial stability of the bearing is further improved, and the reliability of power transmission and the stable operation of the transmission system are ensured.

An oil sump, an engine, a hybrid assembly, and a vehicle. The oil sump is provided with a coolant channel; the oil sump is provided with a liquid outlet in communication with the coolant channel; and the liquid outlet is configured to be in communication with an engine body.

An internal combustion engine includes a first cylinder block, a first head, a first overhead structure, a second cylinder block, a second head, a second overhead structure, a first through-bolt aperture, and a first through-bolt. The first head is in contact with the first cylinder block. The first overhead structure is in contact with the first head opposite the first cylinder block. The second cylinder block is in contact with the first cylinder block opposite the first head. The second head is in contact with the second cylinder block opposite the first cylinder block. The second overhead structure is in contact with the second head opposite the second cylinder block. The first through-bolt aperture is defined through the first overhead structure, the first head, the first cylinder block, the second cylinder block, the second head, and the second overhead structure.

The utility model discloses a multifunctional heat-insulating and sound-absorbing cover assembly of a vehicle cylinder, which comprises a cover body, spherical caulking grooves, a heat-insulating and sound-absorbing cover, a heat-insulating and sound-absorbing cover and a heat-insulating and sound-absorbing cover, the sound insulation cover is arranged above the cover body, a cover cavity is formed in the sound insulation cover, and air holes communicated with the cover cavity are formed in the upper portion and the lower portion of the sound insulation cover; and the sound insulation cotton is filled in the cavity of the cover. The sound insulation cover is arranged above the cover body, the cover cavity is formed in the sound insulation cover, the air holes are formed in the upper portion and the lower portion of the sound insulation cover, and the sound insulation cotton is filled in the cover cavity, so that the cylinder head cover has high noise reduction and heat insulation performance. Meanwhile, the spherical caulking grooves are formed in the two sides of the cover body, the protruding spherical limiting blocks are arranged below the sound insulation cover, and the spherical limiting blocks are embedded in the spherical caulking grooves, so that the sound insulation cover is fast and stable to install and cannot be loosened due to vibration of an engine cylinder.

To provide a V-type eight-cylinder engine capable of suppressing lateral vibration of 1.5-order rotation without disturbing engine balancing design.SOLUTION: The V-type eight-cylinder engine includes eight cylinders arranged separately on left and right banks LB, RB, and the cylinders of each bank LB, RB are fired at unequal intervals. In the V-type eight-cylinder engine, left and right fuel pumps 9L, 9R provided on the left and right banks LB, RB are installed at an angle θp wider than an angle between engine valves arranged on both sides of the left and right banks LB, RB.SELECTED DRAWING: Figure 2

Mounting bracket (100), comprising: a mounting body (102) defining a first opening which is positioned to be aligned with a second opening in a cylinder head (600), wherein the support body (102) comprises a first flange which is arranged in the first opening, the first flange defining a first hole; a threaded insert (118) which is received in the first opening between the cylinder head (600) and the first flange, the threaded insert (118) comprising: an outer surface (612) which engages with the first opening via a thread; an inner surface (610) that defines a second hole; and a front face (614); wherein a rotation of the threaded insert (118) in the first opening enables a selective repositioning of the threaded insert (118) in the first opening; and a fastening element (116) designed to be received in the first hole and the second hole, wherein the fastening element (116) is designed to engage threadably in the second opening, wherein the fastening element (116) comprises a second flange designed to connect to the first flange when the fastening element (116) is screwed into the second opening; wherein the second hole is designed to accommodate a tool for selectively rotating the threaded insert (118).

The utility model discloses a duplex pump for a tractor, relates to the technical field of agricultural machinery, and solves the problems that a plurality of hydraulic pumps cannot be driven due to the limitation of the size of an engine and a connector, and a switching device and a driving device of the hydraulic pump need to be specially arranged, so that the occupied space is increased. A pump shaft of the diesel engine penetrates through the cycloid hydraulic pump and then is connected with the input end of the gear pump, a hydraulic oil cavity used for assembling the outer rotor and the inner rotor is formed in the front side of the cycloid pump body, the outer rotor is rotationally installed in the hydraulic oil cavity, the inner rotor is eccentrically assembled on the pump shaft, and outer teeth of the inner rotor are meshed with inner teeth of the outer rotor. The gear pump and the cycloid hydraulic pump share one pump shaft, the engine can simultaneously drive the gear pump and the cycloid hydraulic pump to operate in the operation process, the functions of the gear pump and the cycloid hydraulic pump are achieved, and the cycloid hydraulic pump is suitable for the use environment with low pressure and displacement requirements and strict space requirements. The heat dissipation pump is particularly suitable for rear axle hydraulic oil heat dissipation pumps of high-horsepower tractors.