CN118815576B - Heavy oil engine with double circulation system - Google Patents
Heavy oil engine with double circulation system Download PDFInfo
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- CN118815576B CN118815576B CN202411314046.0A CN202411314046A CN118815576B CN 118815576 B CN118815576 B CN 118815576B CN 202411314046 A CN202411314046 A CN 202411314046A CN 118815576 B CN118815576 B CN 118815576B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P3/00—Liquid cooling
- F01P3/02—Arrangements for cooling cylinders or cylinder heads
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
- F01P11/04—Arrangements of liquid pipes or hoses
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
- F01P5/12—Pump-driving arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/14—Controlling of coolant flow the coolant being liquid
- F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
- F01P7/165—Controlling of coolant flow the coolant being liquid by thermostatic control characterised by systems with two or more loops
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B67/00—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for
- F02B67/04—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus
- F02B67/06—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus driven by means of chains, belts, or like endless members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/02—Cylinders; Cylinder heads having cooling means
- F02F1/10—Cylinders; Cylinder heads having cooling means for liquid cooling
- F02F1/14—Cylinders with means for directing, guiding or distributing liquid stream
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/02—Gearings for conveying rotary motion by endless flexible members with belts; with V-belts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/14—Controlling of coolant flow the coolant being liquid
- F01P2007/146—Controlling of coolant flow the coolant being liquid using valves
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
本发明提供一种具有双循环系统的重油发动机，涉及内燃机机械设计技术领域，包括发动机主体、补水箱、散热器、压力阀总成、气泵、缸体、缸盖、小循环水管和进水管，发动机主体的端部通过螺栓连接有水泵总成，发动机主体上还通过螺栓连接有双联带轮，补水箱和散热器组成的机构上接通有大循环水管和水泵进水管，通过在水路水道结构加入凸起缓冲装置和一定比例的缸内水道设计，以及一定角度的水泵罩壳，精确控制发动机在各种工况下的缸温，通过在压力阀盖表面设计一定的角度，和在节温器压力弹簧下端加入碟簧设计，调节了水温及水道气压的波动，满足循环冷却水量的要求，通用性、总体布置方便性，保证发动机工作平稳，延长零部件寿命。
The present invention provides a heavy oil engine with a dual circulation system, which relates to the technical field of mechanical design of internal combustion engines. The engine comprises an engine main body, a water supply tank, a radiator, a pressure valve assembly, an air pump, a cylinder block, a cylinder head, a small circulation water pipe and a water inlet pipe. The end of the engine main body is connected with a water pump assembly by bolts, and a double pulley is also connected to the engine main body by bolts. A large circulation water pipe and a water pump water inlet pipe are connected to a mechanism composed of a water supply tank and a radiator. By adding a raised buffer device and a certain proportion of in-cylinder water channel design and a water pump cover with a certain angle to a water channel structure, the cylinder temperature of the engine under various working conditions is accurately controlled. By designing a certain angle on the surface of the pressure valve cover and adding a disc spring design to the lower end of a thermostat pressure spring, the fluctuation of the water temperature and the water channel air pressure is adjusted, the requirement of circulating cooling water volume is met, the versatility and overall layout convenience are ensured, the engine works smoothly, and the service life of parts is extended.
Description
Technical Field
The invention belongs to the technical field of internal combustion engine mechanical design, and particularly relates to a heavy oil engine with a double-circulation system.
Background
In the field of power machines today, the performance and reliability of an engine as a core power source is critical to the operation of various devices. Among the many types of engines, heavy oil engines have raised higher demands on performance and reliability due to the characteristics of their fuels and the special requirements of the application scenario.
The traditional engine is often provided with a simpler single-cycle cooling mode, and the mode has the problems of inaccurate temperature control, insufficient system stability and the like when coping with complex working conditions and high-load operation.
With the continuous progress of technology and the increasing wide application of engines, the performance optimization and reliability improvement of heavy oil engines become important points of research. In particular, in some fields with high requirements on power output and continuous operation, such as ships, heavy machinery and the like, the stability requirements of an engine under different working conditions are difficult to be met by a traditional single-cycle system.
For this reason, it has become a necessary trend to develop a heavy oil engine having a dual cycle system to improve the working performance and reliability of the heavy oil engine. The novel engine can more effectively control the working temperature of the engine, improve the heat dissipation efficiency and reduce the damage to the engine caused by overhigh or overlow temperature, thereby ensuring that the engine can keep a good running state under various complex working conditions.
Disclosure of Invention
In order to solve the technical problems, the invention provides a heavy oil engine with a double-circulation system, so as to solve the problems.
The heavy oil engine with double circulation system includes main engine body, water replenishing tank, radiator, pressure valve assembly, air pump, cylinder cover, small circulating water pipe, water inlet pipe and water inlet and outlet cooling pipeline, the end of the main engine body is connected with water pump assembly via screw bolt, the main engine body is also connected with double belt wheel via screw bolt, the mechanism formed from water replenishing tank and radiator is connected with large circulating water pipe and water inlet pipe, the upper and lower surface end of the main engine body is respectively connected with water outlet pipe and water inlet pipe of engine via screw bolt, in which between the water pump assembly and double belt wheel a water pump belt is mounted to implement transmission, the small circulating water pipe is connected with thermostat via collar, the thermostat is connected with a water pump assembly through a small circulating water pipe, a protecting cover structure is covered on the duplex belt pulley, a cylinder block cooling water channel is arranged in the bottom of the cylinder block, a water inlet pipeline of a water inlet and outlet cooling pipeline is arranged at the lower end of the cylinder block, a water outlet pipeline is arranged at the upper end of the cylinder cover, the protecting cover structure comprises a cover plate, a side cover I and a side cover II, the radiator is connected with a large circulating water pipe and a water inlet pipe of the water pump through a clamp, the pressure valve assembly is connected with a water outlet pipe of an engine through the small circulating water pipe, the pressure valve assembly is connected with the end part of the engine body through a bolt, the water outlet pipe of the engine is connected with the water inlet pipe of the engine through the water inlet pipe clamp, and the water supplementing tank is connected with the radiator through a bolt;
The water pump assembly comprises an inner hexagonal bolt, a water pump belt wheel, a connecting flange, a hydraulic sliding bearing, a water pump support, a water pump sealing device, a water pump impeller and a water pump shell, wherein the hydraulic sliding bearing and the water pump sealing device are in sealing fastening installation, the water pump impeller and the end part of the hydraulic sliding bearing are in interference fit, the end face of the water pump sealing device is connected with the end face of the water pump shell through bolts, the connecting flange and the hydraulic sliding bearing are in interference fit, the water pump belt wheel and the connecting flange are fixedly connected through the inner hexagonal bolt, the water pump support is connected to the water pump sealing device through the inner hexagonal bolt, an O-shaped sealing ring is arranged on the side face of the water pump sealing device and the side face of the water pump shell, and an inner circulation water return port, an engine water inlet and a water tank water inlet are connected on the water pump shell.
Preferably, the pressure valve assembly comprises an air pump lubrication water pipe, an expansion water tank water pipe, a pressure valve water inlet pipe, a pressure valve spring sealing device and a small circulation water inlet pipe;
Wherein, the air pump lubrication water pipe is connected with the air pump.
Preferably, the thermostat comprises a high-temperature outlet, an inlet, a valve body temperature control assembly, an expansion water tank interface, a low-temperature outlet and a disc spring;
The inlet is used for entering cooling liquid, the temperature of the cooling liquid is judged through the valve body temperature control assembly, when the temperature of the cooling liquid is smaller than the maximum working temperature of the engine, the valve body temperature control assembly is opened downwards, the cooling liquid flows out from the low-temperature outlet to complete small circulation, and when the temperature of the cooling liquid is larger than the maximum working temperature of the engine, the valve body temperature control assembly is opened upwards, and the cooling liquid flows out from the high-temperature outlet to complete large circulation.
Preferably, the water inlet and outlet cooling pipeline comprises a cooling liquid outlet pipe port, a fixed bolt, a buffer device and a cooling liquid inlet pipe port;
the buffering device for converging the cooling liquid is of a semicircular arc structure with two protruding ends, a plug hole for placing residual gas is formed in the buffering device, a water inlet pipe of a water pump is connected to a water inlet pipe of the cooling liquid pipe, and a fixing bolt is used for fixing a water inlet and outlet cooling pipeline on a machine body.
Preferably, the cylinder block cooling water channel comprises an air inlet side water channel, a cylinder cover bolt, a scavenging side water channel, a cylinder block bolt, an exhaust side water channel, an exhaust port and a sealing groove;
The cylinder cooling water channel structure is arranged above the cylinder cover, is discharged from each cylinder cover in a two-in-one mode, and gathers cooling liquid to the pressure valve.
Preferably, a pair of limiting pieces are connected to two ends of the side cover, two sleeve pieces are fixed to the inner bottom surface of the side cover, and a notch is formed in the bottom of each sleeve piece.
Preferably, a pair of limiting bayonets are formed at two ends of the second side cover, two sleeves are fixed on the inner wall of the second side cover, and when the first side cover and the second side cover are combined into a circle of side cover, the two pairs of limiting parts are respectively clamped in the two pairs of limiting bayonets.
Preferably, the cover plate is sleeved with two upper bolts and two lower bolts through threads, the two upper bolts are respectively sleeved in the two sleeve members, the two lower bolts are respectively sleeved in the two sleeve pipes, the tail ends of the two upper bolts and the two lower bolts are connected to the cylinder body shell, the first side cover and the second side cover are combined into a side cover ring, the upper bolts are of a thin head thick structure at the end parts, the lower bolts are of a front-back same-diameter structure, and the second side cover is welded to the cylinder body shell.
Compared with the prior art, the invention has the following beneficial effects:
1. According to the invention, the convex buffer device, the design of the cylinder internal water channel with a certain proportion and the water pump housing with a certain angle are added in the waterway water channel structure, so that the cylinder temperature of the engine under various working conditions is accurately controlled, and the water pump housing angle is certain, and the integrated design is adopted, so that the circulating water flows with different sizes can not collide with each other, and the service life is prolonged.
2. The invention adjusts the fluctuation of water temperature and water channel air pressure by designing a certain angle on the surface of the pressure valve cover and adding a disc spring at the lower end of the pressure spring of the thermostat, the thermostat always keeps the engine working at the optimal working temperature, and the design of the pressure valve can be used for removing residual gas.
3. The requirements of circulating cooling water quantity are met, the universality and the overall arrangement convenience are realized, the stable operation of the engine is ensured, and the service life of parts is prolonged.
4. The design protecting cover structure only needs to be disassembled when inspecting and the side cover is disassembled for inspection and simple maintenance, the required operation space is very small, the applicability is good, the cover plate 54 is disassembled for maintenance when the disassembly is needed, the proper disassembly mode is convenient to select according to the size and the requirement of the operation space, and the convenience is provided.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a disassembled view of the water pump assembly of the present invention;
FIG. 3 is a schematic illustration of a disassembled structure of the pressure valve assembly of the present invention;
FIG. 4 is a schematic view showing the internal structure of the thermostat of the present invention;
FIG. 5 is a schematic view of the structure of the cooling water channel of the cylinder body in the invention;
FIG. 6 is an internal construction diagram of the water inlet and outlet cooling pipeline in the present invention;
FIG. 7 is a schematic view of the overall structure of the water pump assembly of the present invention;
FIG. 8 is a schematic view of the overall structure of the pressure valve assembly of the present invention;
FIG. 9 is a schematic view showing the overall structure of the thermostat of the present invention;
FIG. 10 is a schematic view of the overall structure of the protective cover of the present invention;
FIG. 11 is a schematic view of a split structure of the protective cover structure of the present invention;
FIG. 12 is a schematic view of the structure of the first side cover of the present invention.
In the figure, the corresponding relation between the part names and the figure numbers is 1, the water outlet pipe of the engine; 2, an engine water inlet pipe; 3, a duplex belt wheel; 4, an engine main body, 5, a water pump assembly, 6, a radiator, 7, a water supplementing tank, 8, a large circulating water pipe, 9, a water inlet pipe, 10, a pressure valve assembly, 11, a water pump water inlet pipe, 12, a thermostat, 13, a water pump belt, 14, a small circulating water pipe, 15, an air pump, 16, a cylinder, 17, a cylinder cover, 18, a hexagon socket bolt, 19, a water pump belt wheel, 20, a connecting flange, 21, a hydraulic sliding bearing, 23, a water pump bracket, 24, a water pump sealing device, 25, an O-ring, 26, a water pump impeller, 27, an engine water inlet, 28, a water tank water inlet, 29, a water pump housing, 30, an inner circulating water return port, 31, an air pump lubricating water pipe, 32, an expansion water tank water pipe, 33, a pressure valve water inlet pipe, 34, a pressure valve spring sealing device, 35, a small circulating water inlet pipe, 36, a high temperature outlet, 37, an inlet, 38, a valve body temperature control assembly, 39, an expansion water tank interface, 40, a low temperature outlet, 41, a disc spring, 42, an outlet port, 43, a fixing bolt, 44, a buffer device, 45, a plug hole, 46, a plug port, 47, a water inlet port, a 47, a water inlet port, a seal, a 47, a water inlet port, a plug, a 47, a port, a plug, a port, a water inlet, a port, a water, a water inlet water, a water, a, a water, a water a water a.
Detailed Description
Embodiments of the present invention are described in further detail below with reference to the accompanying drawings and examples. The following examples are illustrative of the invention but are not intended to limit the scope of the invention.
Referring to fig. 1-12, the invention provides a heavy oil engine with a dual circulation system, which comprises an engine main body 4, a water supplementing tank 7, a radiator 6, a pressure valve assembly 10, an air pump 15, a cylinder body 16, a cylinder cover 17, a small circulation water pipe 14, a water inlet pipe 9 and a water inlet and outlet cooling pipeline, wherein the end part of the engine main body 4 is connected with a water pump assembly 5 through bolts, the engine main body 4 is also connected with a duplex belt pulley 3 through bolts, a large circulation water pipe 8 and a water pump water inlet pipe 11 are connected to a mechanism consisting of the water supplementing tank 7 and the radiator 6, the upper surface end part and the lower surface end part of the engine main body 4 are respectively connected with an engine water outlet pipe 1 and an engine water inlet pipe 2 through bolts, a water pump belt 13 is arranged between the water pump assembly 5 and the duplex belt pulley 3 to realize transmission, the small circulation water pipe 14 is connected with a thermostat 12 through the small circulation water pipe 14, the water pump assembly 5 , and the duplex belt pulley 3 is covered with a cylinder body cooling water channel, and the bottom of the cylinder body 16 is internally provided with a cover plate 54, a side cover 55 and a side cover 62.
The radiator 6 is connected with the large circulating water pipe 8 and the water pump water inlet pipe 11 through a clamp, the pressure valve assembly 10 is connected with the engine water outlet pipe 1 through the small circulating water pipe 14, the pressure valve assembly 10 is connected with the engine main body 4 through bolts at the end part, the engine water outlet pipe 1 is connected with the engine water inlet pipe 2 through the water inlet pipe 9 through a clamp, and the water supplementing tank 7 is connected with the radiator 6 through bolts.
The water pump assembly 5 comprises an inner hexagon bolt 18, a water pump belt pulley 19, a connecting flange 20, a hydraulic sliding bearing 21, a water pump support 23, a water pump sealing device 24, a water pump impeller 26 and a water pump shell 29, wherein the hydraulic sliding bearing 21 and the water pump sealing device 24 are in sealing fastening installation, the water pump impeller 26 is in interference fit with the end part of the hydraulic sliding bearing 21, the end face of the water pump sealing device 24 is connected with the end face of the water pump shell 29 through bolts, the connecting flange 20 is in interference fit with the hydraulic sliding bearing 21, the water pump belt pulley 19 is fixedly connected with the connecting flange 20 through the inner hexagon bolt 18, the water pump support 23 is connected to the water pump sealing device 24 through the inner hexagon bolt 18, an O-shaped sealing ring 25 is arranged on the side face of the water pump sealing device 24 and the side face of the water pump shell 29, and three ports of the water pump shell 29 are connected with an inner circulation water inlet 30, an engine water inlet 27, a water tank water inlet 28, an inner circulation water inlet 30 and a water tank water inlet 28.
The pressure valve assembly 10 comprises an air pump lubrication water pipe 31, an expansion water tank water pipe 32, a pressure valve water inlet pipe 33, a pressure valve spring sealing device 34 and a small circulation water inlet pipe 35, wherein the air pump lubrication water pipe 31 is connected with an air pump 15, the expansion water tank water pipe 32 is connected with an expansion water tank, the pressure valve water inlet pipe 33 works together through the pressure valve spring sealing device 34 to finish the discharge of residual gas of a water channel and the discharge of residual cooling liquid, and finally the small circulation water pipe 35 is used for completing the small circulation, the air pump lubrication water pipe 31 is an air pump cooling pipeline, and five structures of the air pump lubrication water pipe 31, the expansion water tank water pipe 32, the pressure valve water inlet pipe 33, the pressure valve spring sealing device 34 and the small circulation water inlet pipe 35 are converged on one part, and castings are cast.
The thermostat 12 comprises a high temperature outlet 36, an inlet 37, a valve body temperature control assembly 38, an expansion tank interface 39, a low temperature outlet 40 and a disc spring 41 ,, wherein the inlet 37 is used for entering cooling liquid, the temperature of the cooling liquid is judged through the valve body temperature control assembly 38, when the temperature of the cooling liquid is smaller than the maximum working temperature of an engine, the valve body temperature control assembly 38 is opened downwards, the cooling liquid flows out of the low temperature outlet 40 to complete small circulation, when the temperature of the cooling liquid is larger than the maximum working temperature of the engine, the valve body temperature control assembly 38 is opened upwards, and the cooling liquid flows out of the high temperature outlet 36 to complete large circulation.
The business turn over water cooling pipeline includes out coolant liquid mouth 42, fixing bolt 43, buffer 44, advances coolant liquid mouth 46, wherein, the buffer 44 that gathers the coolant liquid is the bellied semicircle structure in both ends, has the end cap hole 45 of putting residual gas on going into coolant liquid mouth 46 and connecting water pump inlet tube 11, fixing bolt 43 fixes business turn over water cooling pipeline on the organism, fixing bolt 43 is the bolt of fixing business turn over water cooling pipeline, because a part of water is to flow from out coolant liquid mouth 42, the mouth of pipe is thinner moreover, in order to cushion water pressure, design buffer 44 unifies the foundry goods together.
The cylinder block cooling water channel comprises an air inlet side water channel 47, a cylinder head bolt 48, a scavenging side water channel 49, a cylinder body bolt 50, an exhaust side water channel 51, an exhaust port 52 and a sealing groove 53, wherein the air inlet water channel structure of the cylinder block cooling water channel enters each cylinder in a split mode below the cylinder body 16, the air inlet side water channel 47, the exhaust side water channel 51 and the scavenging side water channel 49 are in a 104-degree arc design, the air outlet water channel structure of the cylinder block cooling water channel is arranged above the cylinder head 17 and is discharged from each cylinder head in a two-in-one mode, cooling liquid is gathered to a pressure valve, the air inlet side water channel 47 is close to an air inlet on an engine cylinder body, the scavenging side water channel 49 is close to a scavenging port on the engine cylinder body, the exhaust side water channel 51 is close to an exhaust port on the engine cylinder body, the cylinder body is connected with the cylinder head through the cylinder head bolt 48, and the sealing groove 53 is formed in the end faces of the cylinder body 16 and the cylinder head 17 seals the cooling liquid.
The two ends of the first side cover 55 are connected with a pair of limiting pieces 59, the inner bottom surface of the first side cover 55 is fixedly provided with two sleeve pieces 58, the bottom of each sleeve piece 58 is provided with a notch, the two ends of the second side cover 62 are provided with a pair of limiting bayonets 60, the inner wall of the second side cover 62 is fixedly provided with two sleeves 61, when the first side cover 55 and the second side cover 62 are combined into a circle of side cover, the two pairs of limiting pieces 59 are respectively clamped in the two pairs of limiting bayonets 60, the cover plate 54 is in threaded sleeve connection with two upper bolts 56 and two lower bolts 57, the two upper bolts 56 are respectively sleeved in the two sleeve pieces 58, the two lower bolts 57 are respectively sleeved in the two sleeves 61, the tail ends of the two upper bolts 56 and the two lower bolts 57 are connected to the shell of the cylinder 16, the side cover ring formed by the first side cover 55 and the second side cover 62 is attached to the shell of the cylinder 16, the upper bolts 56 are of a thin-end part thick-head structure, the lower bolts 57 are of a front-back same-diameter structure, and the second side cover 62 are welded to the shell of the cylinder 16.
The cylinder block cooling water channel, the water pump assembly 5, the thermostat 12, the radiator 6 and the pressure valve assembly 10 are connected through a reinforced material rubber tube woven by high-temperature resistant, pressure resistant and corrosion resistant cotton threads, the water pump assembly 5 is arranged above four cylinder sides of the engine main body 4, the water pump impeller 26 rotates cooling liquid from a water tank of the radiator 6, the cooling liquid flows through a water channel of an engine body, water inlet and outlet pipelines of the cylinder block 16 and the cylinder cover 17 are respectively arranged below the cylinder block 16 and above the cylinder cover 17, and the water channel layout of the cylinder block 16 tightly surrounds the air inlet side water channel 47, the air outlet side water channel 51 and the scavenging side water channel 49 to form 104-degree cambered surface design.
The pressure valve assembly 10 is arranged at the uppermost part of the engine and is higher than the water channel structure, the water pump assembly 5 and the thermostat 12, the water pressure of a cooling pipeline is detected through the pressure valve assembly 10, the water pressure and the residual gas of the water channel are regulated, the thermostat 12 is arranged between the water pump assembly 5 and the water outlet pipeline, the temperature fluctuation of the engine water is detected through the thermostat 12, the temperature of the cooling liquid is accurately controlled, the internal and external circulation is realized, the thermostat 12 is connected with the external circulation water channel of the heat dissipation box and the internal circulation water channel of the engine, the large circulation switch is closed under the normal temperature working condition of the engine, the engine performs small circulation, when the temperature of the engine is too high, the large circulation is opened, the cooling is accelerated, the double circulation cooling of the engine cooling system is realized, and the good operation working condition is ensured for the use of the engine.
The water pump assembly 5 is of a Z101A cast aluminum structure, an end cover of the water pump shell 29 and the water pump impeller 26 are 45-75 degrees, three paths of water inlet and outlet are formed, the structure is fixedly connected with the water pump body, circulation of cooling water at different angles can be realized, the water quantity of the converging water pump is controlled, and strong impact is avoided.
The engine water inlet pipe 2 is of a semicircular arc structure with two protruding ends, four residual air discharging holes are formed in the top of the engine water inlet pipe 2, the engine water inlet pipe 2 enters each cylinder in a split and two mode below the cylinder body 16, the water channel structure clings to the air inlet, the air outlet is arranged, the scavenging air inlet is of a 104-degree arc design, the water outlet waterway structure is arranged above the cylinder cover 17, the water outlet waterway structure is discharged from each cylinder cover in a two-in-one mode, and all cooling liquid is gathered into a pressure valve.
The pressure valve assembly 10 is of a Y-shaped structure in a overlook, the top end is provided with a pressure valve spring cover, the left and right are respectively provided with a water inlet, the front end is provided with a residual gas discharge port, the inner cavity of the pressure valve cover is designed in a 15-degree inclined plane, and the bottom is connected and fixed with the pressure valve cover through bolts.
The thermostat 12 is in a cooling liquid circulation structure, the melting point of wax is controlled through temperature, the inlet 37 is arranged outside, the low-temperature outlet 40, the cooling liquid inlet pipe 46 and the expansion tank interface 39 are arranged inside, a spring device for controlling water circulation is arranged inside, the lower end of the spring is connected with the disc spring 41, when the temperature is reached, the wax is melted, the spring is pressed down, the disc spring 41 is contracted, the connection is tight, the effect of controlling temperature and constant pressure is achieved, the sleeve 58 is separated from the thick end of the upper bolt 56 by deflecting the two upper bolts 56 by a certain distance, the first side cover 55 can be pulled away from the second side cover 62 upwards by utilizing a notch at the lower end of the sleeve 58, the maintenance and inspection of the inside of the protecting cover structure are facilitated from the upper side, the whole protecting cover structure is not required to be disassembled, after the two upper bolts 56 and the two lower bolts 57 are disassembled, the first side cover 55 and the second side cover 54 can be detached, the effect of completely exposing the inside of the protecting cover structure is achieved, the first side cover 55 and the cover 54 can be detached simultaneously, and the proper disassembly mode is convenient according to the size and the requirement of an operation space.
Working principle:
The first step adopts the forced circulation water cooling system, the coolant enters the engine body water channel of the engine through the water pump, the coolant absorbs heat from the water channel wall and heats up, then flows upwards into the cylinder head water channel, the coolant is converged into the pressure valve after absorbing heat from the cylinder head water channel wall, the residual gas liquid is released after reaching a certain pressure, the coolant temperature is controlled by the thermostat 12, the coolant flows into the radiator 6 through the radiator water inlet hose, the coolant in the radiator 6 dissipates heat to cool the air flowing around the radiator 6, and finally the coolant returns to the water pump through the radiator water outlet hose, and thus circulates.
And secondly, when the temperature of the engine cylinder exceeds a certain limit, the thermostat 12 performs large and small circulation, wherein the small circulation is that cooling liquid enters a cooling water channel through a water pump to enter a cylinder body 16 and a cylinder cover 17, is converged on a pressure valve cover, and returns to the water pump again through the thermostat 12 through an expansion water tank. The large circulation is that the cooling liquid enters the cooling water channel through the water pump to enter the cylinder body 16 and the cylinder cover 17, is converged on the pressure valve cover, passes through the thermostat 12 through the expansion water tank, the disc spring 41 of the thermostat 12 is opened, the cooling liquid flows into the external radiator 6, is cooled by cooling air, and is input into the water pump again through the water outlet by the radiator 6.
And thirdly, cooling liquid is converged through the pressure valve in the large and small circulation process, and at the moment, the pressure valve releases residual gas and liquid through expansion gas and water pressure fluctuation, so that the whole cooling system is stabilized to stably run, and the optimal working state of the engine is stabilized.
The embodiments of the invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (8)
1. The heavy oil engine with the double circulation system is characterized by comprising an engine main body (4), a water supplementing tank (7), a radiator (6), a pressure valve assembly (10), an air pump (15), a cylinder body (16), a cylinder cover (17), a small circulation water pipe (14), a water inlet pipe (9) and a water inlet and outlet cooling pipeline, wherein the end part of the engine main body (4) is connected with the water pump assembly (5) through bolts, the engine main body (4) is also connected with the double belt wheel (3) through bolts, a large circulation water pipe (8) and the water pump water inlet pipe (11) are communicated with a mechanism consisting of the water supplementing tank (7) and the radiator (6), and the upper surface end part and the lower surface end part of the engine main body (4) are respectively connected with the engine water outlet pipe (1) and the engine water inlet pipe (2) through bolts;
A water pump belt (13) is arranged between the water pump assembly (5) and the duplex belt wheel (3) to realize transmission, a small circulating water pipe (14) is connected with a thermostat (12) through a clamp, and the thermostat (12) is connected with the water pump assembly (5) through the small circulating water pipe (14);
The double belt wheel (3) is covered with a protecting cover structure, the inside of the bottom of the cylinder body (16) is provided with a cylinder body cooling water channel, a water inlet pipeline of a water inlet and outlet cooling pipeline is arranged at the lower end of the cylinder body (16), and a water outlet pipeline is arranged at the upper end of the cylinder cover (17);
the protecting cover structure comprises a cover plate (54), a first side cover (55) and a second side cover (62);
The radiator (6) is connected with the large circulating water pipe (8) and the water pump water inlet pipe (11) through a clamp, the pressure valve assembly (10) is connected with the engine water outlet pipe (1) through the small circulating water pipe (14), the pressure valve assembly (10) is connected with the engine main body (4) at the end part through bolts, the engine water outlet pipe (1) is connected with the engine water inlet pipe (2) through the water inlet pipe (9) through a clamp, and the water supplementing tank (7) is connected with the radiator (6) through bolts;
the water pump assembly (5) comprises an inner hexagon bolt (18), a water pump belt wheel (19), a connecting flange (20), a hydraulic sliding bearing (21), a water pump support (23), a water pump sealing device (24), a water pump impeller (26) and a water pump shell (29), wherein the hydraulic sliding bearing (21) and the water pump sealing device (24) are in sealing fastening installation, the water pump impeller (26) and the end part of the hydraulic sliding bearing (21) are in interference fit, the end surface of the water pump sealing device (24) and the end surface of the water pump shell (29) are connected through bolts, the connecting flange (20) and the hydraulic sliding bearing (21) are in interference fit, the water pump belt wheel (19) and the connecting flange (20) are fixedly connected through the inner hexagon bolt (18), the water pump support (23) is connected to the water pump sealing device (24) through the inner hexagon bolt (18), an O-shaped sealing ring (25) is installed on the side surface of the water pump shell (24), and an inner circulation water return port (30), an engine water inlet (27), a water tank water inlet (28), the engine water inlet (27), an inner circulation water return port (30) and a water tank (28) are connected together.
2. A heavy oil engine with a dual circulation system according to claim 1, characterized in that the pressure valve assembly (10) comprises an air pump lubrication water pipe (31), an expansion tank water pipe (32), a pressure valve water inlet pipe (33), a pressure valve spring sealing device (34), a small circulation water inlet pipe (35);
Wherein, the air pump lubrication water pipe (31) is connected with the air pump (15).
3. A heavy oil engine with a dual circulation system according to claim 2, characterized in that the thermostat (12) comprises a high temperature outlet (36), an inlet (37), a valve body temperature control assembly (38), an expansion tank interface (39), a low temperature outlet (40), a disc spring (41);
the inlet (37) is used for entering cooling liquid, the temperature of the cooling liquid is judged through the valve body temperature control assembly (38), when the temperature of the cooling liquid is smaller than the maximum working temperature of an engine, the valve body temperature control assembly (38) is opened downwards, the cooling liquid flows out from the low-temperature outlet (40) to complete small circulation, when the temperature of the cooling liquid is larger than the maximum working temperature of the engine, the valve body temperature control assembly (38) is opened upwards, and the cooling liquid flows out from the high-temperature outlet (36) to complete large circulation.
4. A heavy oil engine with a dual circulation system as claimed in claim 3, characterized in that the water inlet and outlet cooling line comprises a coolant outlet pipe (42), a fixing bolt (43), a buffer device (44), a coolant inlet pipe (46);
wherein, the buffer device (44) for converging the cooling liquid is of a semicircular arc structure with two protruding ends, a plug hole (45) for discharging residual gas is arranged on the buffer device, a water inlet pipe (11) of a water pump is connected to a water inlet pipe (46), and a fixing bolt (43) is used for fixing a water inlet and outlet cooling pipeline on the machine body.
5. The heavy oil engine with a dual cycle system according to claim 4, wherein the cylinder block cooling water passage includes an intake side water passage (47), a head bolt (48), a scavenging side water passage (49), a cylinder block bolt (50), an exhaust side water passage (51), an exhaust port (52), a seal groove (53);
Wherein, the water inlet channel structure of the cooling water channel of the cylinder body enters each cylinder in a bisection way under the cylinder body (16), the air inlet side water channel (47), the air outlet side water channel (51) and the scavenging side water channel (49) are in 104-degree arc design, the water outlet channel structure of the cylinder block cooling water channel is arranged above the cylinder cover (17), is discharged from each cylinder cover in a two-in-one mode, and gathers cooling liquid to the pressure valve.
6. The heavy oil engine with double circulation system according to claim 5, wherein a pair of limiting members (59) are connected to both ends of the side cover (55), two sleeve members (58) are fixed to the inner bottom surface of the side cover (55), and a notch is formed in the bottom of each sleeve member (58).
7. The heavy oil engine with the double circulation system according to claim 6, wherein a pair of limiting bayonets (60) are formed at two ends of the second side cover (62), two sleeves (61) are fixed on the inner wall of the second side cover (62), and when the first side cover (55) and the second side cover (62) are combined into a circle of side cover, two pairs of limiting pieces (59) are respectively clamped in the two pairs of limiting bayonets (60).
8. The heavy oil engine with the double circulation system according to claim 7, wherein two upper bolts (56) and two lower bolts (57) are sleeved on the cover plate (54) in a threaded manner, the two upper bolts (56) are respectively sleeved in the two sleeve pieces (58), the two lower bolts (57) are respectively sleeved in the two sleeve pieces (61), the tail ends of the two upper bolts (56) and the two lower bolts (57) are connected to the shell of the cylinder body (16), a side cover ring formed by the side cover I (55) and the side cover II (62) is attached to the shell of the cylinder body (16), the upper bolts (56) are of a thin-head thick-end structure, the lower bolts (57) are of a front-back same-diameter structure, and the side cover II (62) is welded on the shell of the cylinder body (16).
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102913313A (en) * | 2011-10-14 | 2013-02-06 | 上汽通用五菱汽车股份有限公司 | Engine cooling system |
| CN204372518U (en) * | 2014-12-25 | 2015-06-03 | 江铃汽车股份有限公司 | A kind of motor car engine belt protective device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101315042B (en) * | 2008-07-07 | 2010-06-09 | 奇瑞汽车股份有限公司 | V type engine and cooling system thereof |
| CN106150650B (en) * | 2015-03-27 | 2019-04-30 | 长城汽车股份有限公司 | An engine and its thermostat assembly |
| US10590833B2 (en) * | 2017-10-03 | 2020-03-17 | Polaris Industries Inc. | Cooling jacket for exhaust valve and thermostat and cooling bottle |
| CN111022236B (en) * | 2019-12-26 | 2021-11-19 | 宁波吉利罗佑发动机零部件有限公司 | Engine thermal management system and vehicle |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102913313A (en) * | 2011-10-14 | 2013-02-06 | 上汽通用五菱汽车股份有限公司 | Engine cooling system |
| CN204372518U (en) * | 2014-12-25 | 2015-06-03 | 江铃汽车股份有限公司 | A kind of motor car engine belt protective device |
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