CN108331663B - High-power V-shaped multi-cylinder diesel engine system - Google Patents

Abstract

The invention discloses a kind of high-power V-shaped multi-cylinder diesel engine systems, including V-cylinder block and multiple monomer cylinder head；Gas handling system comprising four turbocharger and an intercooler；Lubricating system comprising oil cooler；And cooling system, it includes high temperature water-flow circuit and low temperature water-flow circuit, low temperature water-flow circuit is used to cooling machine oil cooler and intercooler, and high temperature water-flow circuit includes front-seat radiator and high-temperature water pump, and high temperature water-flow circuit is used to cool down V-cylinder block and multiple monomer cylinder head.The body is compact, power is high, torque is big.

Description

High-power V-shaped multi-cylinder diesel engine system

technical field

The invention relates to the field of engines, in particular to a high-power V-type multi-cylinder diesel engine system.

Background technique

High-power high-speed diesel engines are generally used in generator stations, petrochemicals, high-speed light ships and ships, etc. It is basically a four-stroke engine. Since high-power high-speed diesel engines require very high single-machine power, their strong load requirements are higher than those of ordinary diesel engines. For foreign advanced high-speed diesel engines, their average effective pressure is up to 3MPa, and the highest explosion pressure is the highest. Up to 20MPa. Since the high-power high-speed diesel engine requires high power and high torque, it has relatively high requirements for several important key systems, such as cylinder block assembly system, power system, diesel system, cooling system, lubrication system, etc.

The information disclosed in this Background section is only for enhancing the understanding of the general background of the present invention and should not be taken as an acknowledgment or any form of suggestion that the information constitutes the prior art that is already known to those skilled in the art.

Contents of the invention

The object of the present invention is to provide a high-power V-type multi-cylinder diesel engine system with compact machine body, high power and large torque.

In order to achieve the above object, the present invention provides a high-power V-shaped multi-cylinder diesel engine system, comprising: a V-shaped cylinder block, on which a plurality of two rows of cylinder bores arranged in a V-shape are arranged, and the two rows The angle between the cylinder bores is 90 degrees; multiple single cylinder heads are respectively installed on the cylinder ports of the two rows of cylinder bores; the air intake system includes four turbochargers and an intercooler, The intercooler is fixed above the rear end of the V-shaped cylinder block, and every two turbochargers are arranged in a group, and the two groups of turbochargers are respectively arranged on the two rows of single cylinder heads along the arrangement direction of the two rows of cylinder holes. At the position above the rear end, the turbines of each group of turbochargers are set opposite to each other and the two turbo exhaust pipes converge to form an exhaust port. The compressors of each group of turbochargers are connected with horizontal air filters. The compressors of each turbocharger are respectively connected through the air pipe and the intercooler, and the two sides of the bottom of the intercooler are respectively provided with air outlets, and the two air outlets are respectively connected with intake pipes, and the intake pipes pass through five single pipes It is connected, and each single pipe is integrally formed with an intake pipe; the lubrication system includes an oil pan, two pre-supply oil pumps, two oil pumps, an oil filter and an oil cooler, and the oil pan is located on the At the bottom of the V-shaped cylinder block, two pre-supply oil pumps are installed on the front side of the oil pan, two oil pumps are installed on both sides below the crankshaft pulley at the front end of the V-shaped cylinder block, and the oil cooler is installed on the V-shaped cylinder block The oil filter is set at the upper left position of the front end of the V-shaped cylinder block, and the oil in the oil pan is input into the oil cooler through two pre-supply oil pumps and two oil pumps at the same time. It is connected with the oil filter through the oil pipe, and the oil outlet of the oil filter is connected with the main engine oil passage of the V-shaped cylinder block; and the cooling system, which includes a high-temperature water circulation circuit and a low-temperature water circulation circuit, and the low-temperature water circulation circuit includes the rear radiator And the low-temperature water pump, the low-temperature water circulation circuit is used to cool the oil cooler and the intercooler, the high-temperature water circulation circuit includes the front radiator and the high-temperature water pump, and the high-temperature water circulation circuit is used to cool the V-shaped cylinder block and multiple cylinder heads.

Preferably, pistons with W combustion chambers are arranged in the two rows of cylinder bores of the V-shaped cylinder block, internal cooling oil passages are provided inside the pistons, and four ring grooves are provided on the circumferential walls of the pistons.

Preferably, the high-temperature water pump and the low-temperature water pump are arranged on both sides above the crankshaft pulley at the front end of the V-shaped cylinder block, and the crankshaft pulley drives the low-temperature water pump and the high-temperature water pump respectively. The water outlet main pipe enters the front row radiator, and a thermostat is connected between the water outlet main pipe and the front row radiator, and the thermostat is arranged on the V-shaped cylinder block at the rear side of the oil cooler.

Preferably, the intercooler is in the form of a rectangular shell with an air circulation cavity inside the rectangular shell, and a coolant flow channel is provided in the rectangular shell around the air circulation cavity, and the low-temperature water circulation circuit and the coolant flow channel in the rectangular shell connected.

Preferably, the oil filter includes a base body and a plurality of filter cartridges arranged on the base body, and the plurality of filter cartridges are arranged horizontally.

Preferably, the stroke-to-bore ratio of the high-power V-type multi-cylinder diesel engine system is 1.05-1.23.

Preferably, the ratio of the center distance of adjacent cylinders to the bore diameter of the high-power V-shaped multi-cylinder diesel engine system is 1.25-1.4.

Preferably, the number of cylinders of the high-power V-type multi-cylinder diesel engine system is 12, 16 or 20.

Compared with the prior art, the present invention has the following beneficial effects: by setting a V-shaped cylinder block, a plurality of single cylinder heads, four superchargers and an intercooler, the compressed air is cooled to further increase its density, It is beneficial to increase the power and performance of the engine. The cooling system uses high and low temperature water for separate cooling, so that the high temperature and low temperature components are cooled separately, which can reduce the intake air temperature and engine oil temperature, and reduce heat loss at the same time. The engine is more fuel-efficient and meets high-power high-speed diesel engines. To meet the requirements of power and high torque, the machine body is more compact and stronger.

Description of drawings

Fig. 1 is the structural representation of the V-shaped cylinder block of high-power V-type multi-cylinder diesel engine system according to the present invention;

Fig. 2 is according to the structural representation of single cylinder head arranged on the V-shaped cylinder block of high-power V-type multi-cylinder diesel engine system of the present invention;

Fig. 3 is the front view of high-power V-type 20-cylinder diesel engine system according to the present invention;

Fig. 4 is the right side view of high-power V-type 20-cylinder diesel engine system according to the present invention;

Fig. 5 is the left side view of high-power V-type 20-cylinder diesel engine system according to the present invention;

Fig. 6 is the top view of high-power V-type 20-cylinder diesel engine system according to the present invention;

Fig. 7 is a schematic diagram of the cooling system of the high-power V-type multi-cylinder diesel engine system according to the present invention.

Detailed ways

The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

Unless expressly stated otherwise, throughout the specification and claims, the term "comprise" or variations thereof such as "includes" or "includes" and the like will be understood to include the stated elements or constituents, and not Other elements or other components are not excluded.

As shown in Figures 1 to 2, a high-power V-shaped multi-cylinder diesel engine system according to a specific embodiment of the present invention includes a V-shaped cylinder block 100 and a plurality of single cylinder heads 200, wherein the V-shaped cylinder block 100 is There are a plurality of two rows of cylinder holes arranged in a V shape, the angle between the two rows of cylinder holes of the V-shaped cylinder block 100 is 90 degrees, and a plurality of single cylinder heads 200 are respectively installed on the V-shaped cylinder block 100 The cylinder port of the upper two rows of cylinder bores.

The number of cylinders of the high-power V-type multi-cylinder diesel engine system provided in this embodiment can be 12, 16 or 20, and this embodiment uses 20 cylinders as an example for illustration.

As shown in Figures 3 to 6, the high-power V-shaped multi-cylinder diesel engine system includes a V-shaped cylinder block 100 and 20 single cylinder heads 200, wherein 20 V-shaped cylinder heads are arranged on the V-shaped cylinder block 100. The angle between the two rows of cylinder holes of the V-shaped cylinder block 100 is 90 degrees, and 20 single cylinder heads 200 are installed on the cylinder mouths of the two rows of cylinder holes on the V-shaped cylinder block 100 respectively. It also includes the air intake system, the air intake system includes four turbochargers and an intercooler 1, every two turbochargers are arranged in a group, and the two groups of turbochargers are respectively arranged along the arrangement direction of the two rows of cylinder bores At the position above the rear ends of the two rows of single cylinder heads (see Figure 6, two turbochargers arranged along the arrangement direction of the two rows of cylinder bores form a group), the turbines 21 of each group of turbochargers are arranged oppositely and the two The exhaust pipes after the four vortex converge to form an exhaust outlet 23, and the compressors of each group of turbochargers are connected with a horizontal air filter 22, and the compressors of each turbocharger pass through the air pipe 24 and the intercooler respectively. The intercooler 1 is connected, and the two sides of the bottom of the intercooler 1 are respectively provided with air outlets 11 (see Figure 4). The two air outlets 11 are respectively connected with intake pipes 6, and the intake pipes 6 are formed by connecting five single pipes. , each single pipe is integrally formed with an air intake connection. The lubrication system includes an oil pan 5, two pre-supply oil pumps 9, two oil pumps 8, an oil filter 10 and an oil cooler 4. The oil pan 5 is located at the bottom of the V-shaped cylinder block 100, and the two pre-supply The oil pump 9 is arranged on the front side of the oil pan 5, the two oil pumps 8 are arranged on both sides below the crankshaft pulley at the front end of the V-shaped cylinder block 100, and the oil cooler 4 is arranged on the upper left of the front end of the V-shaped cylinder block 100 position, the oil filter 10 is set at the upper right position of the front end of the V-shaped cylinder block 100, the oil in the oil pan 5 is input into the oil cooler 4 through two pre-supply pumps 9 and two oil pumps 8 at the same time, and the oil is cooled The device 4 and the oil filter 10 are connected by an oil pipe, and the oil outlet of the oil filter 10 communicates with the main engine oil passage of the V-shaped cylinder block 100. The cooling system includes a high-temperature water circulation loop and a low-temperature water circulation loop. The low-temperature water circulation loop includes the rear radiator and the low-temperature water pump 6. The low-temperature water circulation loop is used to cool the oil cooler 4 and the intercooler 1. The high-temperature water circulation loop includes the front radiator and the high-temperature water pump. The water pump 7 and the high-temperature water circulation circuit are used to cool the V-shaped cylinder block 100 and the 20 individual cylinder heads 200 .

In the above scheme, one head is designed for each cylinder, and the strength of the cylinder head is high. The cooling system includes a high-temperature water circulation loop and a low-temperature water circulation loop. The low-temperature water circulation loop includes a rear radiator and a low-temperature water pump. The low-temperature water circulation loop is used to cool the oil cooler. The high-temperature water circulation loop includes a front radiator and a high-temperature water pump. The high-temperature water circulation loop is used for Cool the V-shaped cylinder block 100 and 20 single cylinder heads 200, this uses high and low temperature water for separate cooling, low temperature water cools the intercooler and oil cooler, high temperature water cools the cylinder block and cylinder head, which can reduce the intake air temperature and oil Temperature, while reducing heat energy loss, the engine is more fuel-efficient. Using the existing exhaust gas turbocharging technology, a supercharging and intercooling system is formed by setting four independent superchargers and an intercooler. When the engine is working, the exhaust gas from the engine exhaust pipe enters the turbine, and the exhaust gas pressure The heat energy of the turbine turns the turbine and the compressor coaxial with the turbine. The compressor sucks in and compresses the air, and then enters the engine intake pipe through the pipe, and the cooled and expanded exhaust gas leaving the turbine is directed by the turbine casing to the exhaust gas outlet 23 in the middle of the supercharger to enter the atmosphere. After the intake air is compressed, the air density charged into the cylinder is increased. With the good cooperation of the fuel supply system, more fuel can be fully burned, the power is increased, and the economy is improved.

As a preferred embodiment, the two rows of cylinder bores of the V-shaped cylinder block 100 are provided with pistons with W combustion chambers, internal cooling oil passages are provided inside the pistons, and four ring grooves are provided on the circumferential walls of the pistons. In this solution, the W combustion chamber technology is adopted, the intake air volume is large, the mixing is uniform, the combustion is more complete, and the power range with low fuel consumption is wide. The piston adopts an internal cooling oil channel structure for good cooling, and a four-ring groove structure for better sealing effect.

As a preferred embodiment, as shown in Figure 5, the high-temperature water pump 7 and the low-temperature water pump 6 are arranged on both sides above the crankshaft pulley at the front end of the V-shaped cylinder block 100, and the crankshaft pulley drives the low-temperature water pump 6 and the high-temperature water pump 7 respectively, and flows through The coolant of the V-shaped cylinder block 100 and 20 single cylinder heads 200 enters the front radiator through the water outlet main pipe, and a thermostat is connected between the water outlet main pipe and the front row radiator, and the thermostat is arranged behind the oil cooler 4 On the V-shaped cylinder block 100 on the side.

As a preferred embodiment, the intercooler 1 is in the form of a rectangular shell, which has an air circulation cavity inside the rectangular shell, and a coolant flow channel is arranged in the rectangular shell around the air circulation cavity, and the low-temperature water circulation circuit is connected with the rectangular shell. The coolant flow passage is connected. In this scheme, a low-temperature water distributor can be installed in the low-temperature water circulation circuit, and the low-temperature water distributor can be fixed at the front end of the V-shaped cylinder block near the top of the crankshaft pulley. The purpose of setting up the low-temperature water distributor is that the low-temperature water circulation circuit can cool the oil cooler at the same time 4 and intercooler 1.

As a preferred embodiment, the oil filter 10 includes a base body and a plurality of filter cartridges arranged on the base body, the plurality of filter cartridges are arranged horizontally, preferably eight filter cartridges are arranged.

As shown in Figure 7, this embodiment proposes to use high and low temperature water for separate cooling, low temperature water to cool the intercooler and oil cooler, and high temperature water to cool the cylinder block and cylinder head. This cooling system belongs to the forced closed circulation water cooling system. Antifreeze and antirust coolant should be used as the coolant. Use high and low temperature water to cool separately, low temperature water to cool the intercooler and oil cooler, high temperature water to cool the cylinder block and cylinder head, the high temperature water outlet temperature is controlled at 75-95°C, and the engine oil temperature is controlled at 80-110°C. In this system, the water pump and fan, radiator, and oil cooler are the main components of the cooling system. When the engine is running, the high and low temperature water pumps are respectively driven by the crankshaft timing gear through the left and right idler gears to drive the impeller of the water pump to rotate. The coolant generates a certain pressure under the centrifugal force of the water pump and flows out from the outlet of the water pump. The coolant pumped out by the high-temperature water pump enters the cooling water jacket of the cylinder block and cylinder head. After cooling the cylinder block and cylinder head, the coolant flows into the water outlet main pipe and flows into the radiator after passing through the thermostat. The thermostat is installed at the end of the water outlet pipe. The thermostat automatically controls the temperature. When the coolant temperature is higher than 75°C, the thermostat is turned on. When the coolant temperature is higher than 85°C, the thermostat is fully opened. All the liquid enters the radiator and flows back to the water pump. If the coolant temperature is lower than 75°C, it does not need to be cooled by the radiator, but directly flows to the water pump to start the cooling cycle again. The low-temperature water pump cools the intercooler and oil cooler, and then returns to the radiator for heat dissipation. This kind of classified cooling of high temperature and low temperature components can reduce the intake air temperature and engine oil temperature, and at the same time reduce the loss of heat energy, and the engine is more fuel-efficient.

As a preferred embodiment, the stroke-to-bore ratio of the high-power V-type multi-cylinder diesel engine system is 1.05-1.23. In this scheme, a smaller stroke-to-bore ratio can be used to reduce the height, width and weight of the diesel engine, increase the speed of the diesel engine, and increase the power of the diesel engine.

As a preferred embodiment, the ratio of the center distance of adjacent cylinders to the bore diameter of the high-power V-type multi-cylinder diesel engine system is 1.25-1.4. In this solution, the ratio of cylinder center distance to bore diameter is 1.25-1.4, the length of the diesel engine is more compact, the degree of reinforcement of the diesel engine is higher, and the rigidity of the crankshaft and the body is stronger. As the length of the crankshaft is shortened, the torsional rigidity is enhanced, the natural vibration circular frequency of the shaft system is increased, and the torsional vibration performance is improved.

To sum up, in the high-power V-shaped multi-cylinder diesel engine system of this embodiment, by setting a V-shaped cylinder block 100 and a plurality of single cylinder heads 200, the intake system is equipped with four superchargers and an intercooler, and the compressed air passes through Cooling to further increase its density is beneficial to increase the power and performance of the engine. The cooling system uses high and low temperature water for separate cooling, so that high temperature and low temperature parts are cooled separately, which can reduce the intake air temperature and engine oil temperature, and reduce heat loss at the same time, making the engine more efficient. Fuel-efficient, meeting the high-power and high-torque requirements of high-power high-speed diesel engines, the body is more compact and strong.

The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. These descriptions are not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application, thereby enabling others skilled in the art to make and use various exemplary embodiments of the invention, as well as various Choose and change. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims (8)

1. A high-power V-type multi-cylinder diesel engine system, characterized in that it comprises: A V-shaped cylinder block, a plurality of two rows of cylinder holes arranged in a V shape are arranged on the V-shaped cylinder block, and the angle between the two rows of cylinder holes is 90 degrees; A plurality of single cylinder heads, which are respectively installed on the cylinder ports of the two rows of cylinder holes; Intake system, which includes four turbochargers and an intercooler, the intercooler is fixed above the rear end of the V-shaped cylinder block, every two turbochargers are arranged in a group, two groups The turbochargers are respectively arranged above the rear ends of the two rows of single cylinder heads along the arrangement direction of the two rows of cylinder holes, the turbines of each group of turbochargers are arranged oppositely, and the two turbo exhaust pipes converge to form a Exhaust gas exhaust ports, the compressors of each group of turbochargers are connected with horizontal air filters, the compressors of each turbocharger are respectively connected to the intercooler through the air pipe, and the intercooler There are air outlets on both sides of the bottom, and the two air outlets are respectively connected with air intake pipes, the air intake pipes are connected by five single pipes, and each single pipe is integrally formed with an air intake connection; Lubrication system, which includes an oil pan, two pre-supply oil pumps, two oil pumps, an oil filter and an oil cooler, the oil pan is arranged at the bottom of the V-shaped cylinder block, and the two pre-supply The oil supply pump is arranged on the front side of the oil pan, the two oil pumps are arranged on both sides below the crankshaft pulley at the front end of the V-shaped cylinder block, and the oil cooler is arranged on the V-shaped cylinder block the upper left position of the front end of the V-shaped cylinder block, the oil filter is arranged at the upper right position of the front end of the V-shaped cylinder block, the oil in the oil pan passes through the two pre-supply pumps and the two engine The oil pump is input into the oil cooler at the same time, the oil cooler and the oil filter are connected through an oil pipe, and the oil outlet of the oil filter communicates with the main engine oil channel of the V-shaped cylinder block; and The cooling system includes a high-temperature water circulation circuit and a low-temperature water circulation circuit, the low-temperature water circulation circuit includes a rear radiator and a low-temperature water pump, the low-temperature water circulation circuit is used to cool the oil cooler and the intercooler, and the high-temperature water circulation circuit A water circulation circuit includes a front radiator and a high-temperature water pump, and the high-temperature water circulation circuit is used to cool the V-shaped cylinder block and the plurality of unitary cylinder heads. 2. The high-power V-type multi-cylinder diesel engine system according to claim 1, wherein a piston with a W combustion chamber is arranged in the two rows of cylinder bores of the V-shaped cylinder block, and the inside of the piston has internal cooling. Oil passage, four ring grooves are arranged on the circumferential wall of the piston. 3. The high-power V-type multi-cylinder diesel engine system according to claim 1, wherein the high-temperature water pump and the low-temperature water pump are arranged on both sides above the front crankshaft pulley of the V-shaped cylinder block, and the The crankshaft pulley respectively drives the low-temperature water pump and the high-temperature water pump, and the coolant flowing through the V-shaped cylinder block and the plurality of single cylinder heads enters the front radiator through the water outlet main pipe, and the water outlet main pipe and A thermostat is connected between the front row radiators, and the thermostat is arranged on the V-shaped cylinder block at the rear side of the oil cooler. 4. The high-power V-type multi-cylinder diesel engine system according to claim 1, wherein the intercooler is a rectangular shell, and the inside of the rectangular shell has an air circulation cavity, and the air circulation cavity A cooling liquid channel is arranged in a rectangular casing around the body, and the low-temperature water circulation circuit communicates with the cooling liquid flow channel in the rectangular casing. 5. The high-power V-type multi-cylinder diesel engine system according to claim 1, wherein the oil filter comprises a seat body and a plurality of filter cartridges arranged on the seat body, and the plurality of filter cartridges horizontal setting. 6. The high-power V-type multi-cylinder diesel engine system according to claim 1, wherein the stroke-to-bore ratio of the high-power V-type multi-cylinder diesel engine system is 1.05-1.23. 7. The high-power V-type multi-cylinder diesel engine system according to claim 1, characterized in that the ratio of the center distance of adjacent cylinders to the bore diameter of the high-power V-type multi-cylinder diesel engine system is 1.25-1.4. 8. The high-power V-type multi-cylinder diesel engine system according to claim 1, wherein the number of cylinders in the high-power V-type multi-cylinder diesel engine system is 12, 16 or 20.