CN103993958A - Energy-saving and environment-friendly type high-power locomotive diesel engine - Google Patents
Energy-saving and environment-friendly type high-power locomotive diesel engine Download PDFInfo
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- CN103993958A CN103993958A CN201410239001.1A CN201410239001A CN103993958A CN 103993958 A CN103993958 A CN 103993958A CN 201410239001 A CN201410239001 A CN 201410239001A CN 103993958 A CN103993958 A CN 103993958A
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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
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Abstract
The invention provides an energy-saving and environment-friendly type high-power locomotive diesel engine. The energy-saving and environment-friendly type high-power locomotive diesel engine comprises an acting unit, a crankshaft assembly, a gear transmission device, a fuel injection system assembly, an air valve driving mechanism, a camshaft assembly and a pressurizer. The acting unit is composed of a cylinder head assembly, a cylinder sleeve assembly and a piston rod. The crankshaft assembly is installed in the crankshaft cavity of an engine body. The gear transmission device is arranged in the gear cavity of the free end of the engine body in a centralized mode. The camshaft assembly is installed in the cavity of the engine body and above the crankshaft assembly. The crankshaft assembly drives the gear transmission device, and the camshaft assembly is driven by the gear transmission device. A fuel injection pump in the fuel injection system assembly and the air valve driving mechanism are driven by the camshaft assembly. The pressurizer, an air inlet system and an air exhaust system form a MPC pressurization system. According to the energy-saving and environment-friendly type high-power locomotive diesel engine, the shortcomings that an existing locomotive diesel engine is poor in mechanical load and thermal load bearing capacity, low in energy conservation and environmental protection level, poor in overall maintainability and the like, and dynamic performance indexes are insufficient.
Description
Technical field
The present invention relates to Diesel Engine Technique Field, especially relate to a kind of energy saving and environment friendly high-power locomotive diesel engine.
Background technique
Diesel engine because the thermal efficiency is high, the outstanding advantages such as good economy performance, starting be easy, after certainly coming out, be used as soon the traction power of rail traction track traffic internal combustion locomotive.Existingly take the internal combustion locomotive that diesel engine is traction power and still in rail traction Transit Equipment, occupy leading position.
Due to the gap of the aspects such as the fundamental research at diesel engine, design means, product testing checking, key components and parts exploitation, material, manufacture level, make Engine on National Locomotive diesel engine aspect the combination properties such as power character, Economy, discharge, particularly part reliability, complete machine exist no small gap with external similar advanced diesel engine product working life.Current Engine on National Locomotive diesel engine mean effective pressure power index is lower than 17bar, and fuel consumption rate is higher than 210g/KWh, and discharge can only reach UIC I standard, and the diesel engine overhaul phase is only 900,000 kilometers, and maintenance is poor.Therefore, existing diesel engine of locomotive is larger to energy consumption, and power index is poor, and exhaust emission is large, can not adapt to that following rail traction passenger traffic is quick, shipping is quick, the development need of heavy haul transport.
Summary of the invention
The technical problem to be solved in the present invention is: the problem existing for prior art, a kind of energy saving and environment friendly high-power locomotive diesel engine is provided, and improve power index and the energy-conserving and environment-protective level of diesel engine, and be convenient to maintenance.
The technical problem to be solved in the present invention realizes by the following technical solutions: a kind of energy saving and environment friendly high-power locomotive diesel engine, comprise acting unit, crank assemblby, gear drive, fuel injection system assembly, valve actuation mechanism and camshaft assembly and pressurized machine, described acting unit is by cylinder head assembly, cylinder liner assembly and the piston rod being arranged in cylinder liner assembly cylinder body assembly, described crank assemblby is arranged in body crankshaft cavity, described gear drive centralized arrangement is in the free-ended gear cavity of body, described camshaft assembly is arranged on body inner chamber and is positioned at crank assemblby top, described crank assemblby actuation gear transmission device, described camshaft assembly is driven by gear drive, Injection Pump, valve actuation mechanism in described fuel injection system assembly drive by camshaft assembly, described pressurized machine is connected and communicates with vent systems outlet end with gas handling system entry end respectively, and described gas handling system outlet end, vent systems entry end communicate with cylinder head assembly respectively.
Further, described crank assemblby comprises bent axle, crank-shaft link neck and crankshaft main journal and crankweb, and crank-shaft link neck wherein and piston rod assembling cooperatively interact, and crankshaft main journal adopts sliding bearing mode to coordinate with housing main bearing dead eye.
Further, described crank assemblby also comprises crankshaft counter balance, and described crankshaft counter balance is fixedly connected with crankweb.
Further, described gear drive is comprised of crankshaft gear, intermediate gear and distribution idle pulley and camshaft gear wheel, crankshaft gear be wherein fixedly connected with crank assemblby and with intermediate gear engagement driving, described distribution idle pulley arranges two, be distributed in intermediate gear both sides and respectively with intermediate gear engagement driving, camshaft gear wheel arranges two, be distributed in intermediate gear both sides, and be positioned at the intermeshing transmission of distribution idle pulley, camshaft gear wheel of intermediate gear the same side, described camshaft gear wheel driving cam axle assembly revolution.
Further, crankshaft gear in described gear drive is arranged with the coaxial up-down structure of intermediate gear, two distribution idle pulleys take through the axis in crankshaft gear and the intermediate gear center of circle as symmetry axis be symmetrically distributed in intermediate gear both sides also respectively with intermediate gear engagement driving, two camshaft gear wheels be take and are symmetrically distributed in intermediate gear both sides through the axis in crankshaft gear and the intermediate gear center of circle as symmetry axis, and are positioned at the intermeshing transmission of distribution idle pulley, camshaft gear wheel of intermediate gear the same side.
Further, described camshaft assembly is single-unit fabricated structure, on the camshaft shaft part of each single-unit, is provided with tactic intake cam, fuel cam and exhaust cam, between the camshaft shaft part of each single-unit, by coupling shaft, is fixedly connected with.
Further, described cylinder head assembly comprises cylinder head, spring for valve, suction valve and outlet valve, and described cylinder head is fastened on body, and described suction valve and outlet valve run through cylinder head and be parallel to each other layout.
Further, described valve actuation mechanism is comprised of air valve pusher body, rocking arm, transverse arm and rocker arm bracket and tappet, described transverse arm and tappet lay respectively at rocker arm bracket both sides, described rocking arm is movably connected on rocker arm bracket, described rocker arm bracket is fixed on cylinder cover upper planar surface, described tappet one end contacts with air valve pusher body, the other end and rocking arm one end in contact, and the rocking arm the other end contacts with transverse arm.
Further, described piston rod assembling comprises piston, wrist pin and connecting rod and connecting rod cap, and described piston is flexibly connected with connecting rod small end by wrist pin, in relative major part one end of connecting rod, connects connecting rod cap.
Further, described fuel injection system assembly is to adopt electrically-controlled pump nozzle PNU fuel injection system, and described electrically-controlled pump nozzle PNU fuel injection system is by electronic controlled fuel EUI unit controls fuel injection amount and injection timing.
Compared with prior art, the invention has the beneficial effects as follows: because acting unit adopts Modular Structure Design, be convenient to integral hoisting, gear drive centralized arrangement is in the free-ended gear cavity of body, gas handling system, vent systems and pressurized machine form MPC pressurization system jointly, therefore, the mechanical load of diesel engine of the present invention and heat load ability to bear are greatly promoted, and have greatly improved power index and the functional reliability of diesel engine; Simultaneously, by MPC pressurization system, realized recycling after the discharging waste gas turbosupercharging of diesel engine, can effectively improve diesel engine declared working condition part load performance, and utilize fuel injection system assembly accurately to control fuel oil and spray, greatly reduced the fuel consumption rate of diesel engine, thereby greatly improve the emission performance of diesel engine, make this diesel engine can reach EPA TIERII or UIC III emission standard, improved the energy-conserving and environment-protective level of diesel engine, the overhaul phase that has extended diesel engine, there is good Economy; In addition, the integral hoisting of acting unit also can solve the poor technical barrier of whole maintenance of existing locomotive diesel effectively.
Accompanying drawing explanation
Fig. 1 is the vertical section structure schematic diagram of a kind of energy saving and environment friendly high-power locomotive diesel engine of the present invention.
Fig. 2 is the cross section structure schematic diagram of a kind of energy saving and environment friendly high-power locomotive diesel engine of the present invention.
Fig. 3 is the structural representation of crank assemblby in Fig. 1.
Fig. 4 is the structural representation of Fig. 1 middle gear transmission device.
Fig. 5 is the structural representation of cylinder liner assembly in Fig. 1.
Fig. 6 is the structural representation of piston rod assembling in Fig. 2.
Fig. 7 is the structural representation of valve actuation mechanism in Fig. 2.
Fig. 8 is the structural representation of cylinder head assembly in Fig. 2.
Fig. 9 is the structural representation of Fig. 2 cam axle assembly.
Mark in figure: 1-oil sump, 2-body, 3-connecting box, 4-crank assemblby, 5-gear drive, 6-oil pump, 7-cooling waterpump, the assembling of 8-piston rod, 9-fuel injection system assembly, 10-valve actuation mechanism, 11-cylinder head assembly, 12-camshaft assembly, 13-gas handling system, 14-vent systems, 15-cylinder liner assembly, 16-pressurized machine, 17-elastic damping coupler, 19-Injection Pump pusher body, 20-reed damping type shock reducing device, 21-pump support box, 22-pump drive gear, 23-vibration isolator, 24-body air cavity, 25-diesel engine main oil gallery, the cooling water cavity of 26-high-temperature water, 27-piston nozzle cooling oil duct, 28-explosion-proof valve, 40-crank-shaft link neck, 41-crankshaft main journal, 42-crankshaft counter balance, 43-crankweb, 44-bent axle, 50-crankshaft gear, 51-intermediate gear, 52-distribution idle pulley, 53-camshaft gear wheel, 80-piston, 81-wrist pin, 82-connecting rod, 83-connecting rod cap, 101-air valve pusher body, 102-rocking arm, 103-transverse arm, 104-rocker arm bracket, 105-tappet, 110-cylinder head, 111-spring for valve, 112-suction valve, 113-rotocap, 114-Cooling Water Jacket of Cylinder Head, 115-outlet valve, 120-camshaft, 121-coupling shaft, 122-intake cam, 123-fuel cam, 124-exhaust cam, 130-suction tude, 131-air inlet bellows, 132-intercooler, 133-air inlet pressure stabilizing chamber, 140-exhaust branch pipe, 141-exhaust manifold, 142-exhaust expansion bellows, 150-cylinder liner, 151-wearing ring, 152-seal ring.
Embodiment
In order to make object of the present invention, technological scheme and advantage clearer, below in conjunction with the drawings and specific embodiments, the present invention is described in detail.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
A kind of energy saving and environment friendly high-power locomotive diesel engine as shown in Figure 1 and Figure 2, diesel engine pattern is four-stroke twelve-cylinder structure, comprises acting unit, oil sump 1, body 2, connecting box 3, crank assemblby 4, gear drive 5, fuel injection system assembly 9, valve actuation mechanism 10, camshaft assembly 12, gas handling system 13 and vent systems 14 and pressurized machine 16.Described body 2 bottom surfaces are provided with wet sump 1; at body 2 output terminals, be provided with the connecting box 3 of installing for main generator; at body 2 free ends, connect pump support box 21 and electric monitoring and protecting system; the observation lid of diesel engine, oil pump 6 and cooling waterpump 7 etc. are installed on pump support box 21; described cooling waterpump 7 comprises high and low temperature water pump; thereby simplified the overall structure of body 2, improved processing, the packaging technology efficiency of diesel engine.Modularization and acting unit that can integral hoisting are installed on body 2, and described acting unit is mainly comprised of cylinder head assembly 11, cylinder liner assembly 15 and the piston rod assembling 8 that is arranged in cylinder liner assembly 15 cylinder bodies; Described crank assemblby 4 is arranged in body 2 crankshaft cavities; Described gear drive 5 centralized arrangement drive in the free-ended gear cavity of body 2 and by crank assemblby 4; Described camshaft assembly 12 is arranged on body 2 inner chambers and is positioned at crank assemblby 4 tops, and described camshaft assembly 12 is driven by gear drive 5; Injection Pump in described fuel injection system assembly 9, valve actuation mechanism 10 drive by camshaft assembly 12; Described gas handling system 13 and vent systems 14 are all arranged on body 2 tops, and described gas handling system 13 entry ends are connected and communicate with pressurized machine 16 respectively with vent systems 14 outlet end, described gas handling system 13 outlet end, vent systems 14 entry ends communicate with cylinder head assembly 11 respectively.
Described body 2 adopts magnesium iron cast inblocks to form, and cylinder liner assembly 15 is divided into left and right two rows that are 50 degree angles and is arranged on body 2, and every row arranges six, thereby makes the V-shaped topology layout in diesel engine top, as shown in Figure 2.Body 2 arranged on left and right sides are provided with valve actuation mechanism 10, and described valve actuation mechanism 10 is driven by the camshaft assembly 12 being arranged in chamber, 2 liang of outsides of body.As shown in Figure 7, described valve actuation mechanism 10 is mainly comprised of air valve pusher body 101, rocking arm 102, transverse arm 103 and rocker arm bracket 104 and tappet 105, described transverse arm 103 lays respectively at rocker arm bracket 104 both sides with tappet 105, described rocking arm 102 is movably connected on rocker arm bracket 104, described rocker arm bracket 104 is fixed on plane in cylinder head 110, described tappet 105 one end contact with air valve pusher body 101, the other end and rocking arm 102 1 end in contact; rocking arm 102 the other ends contact with transverse arm 103, described transverse arm 103 two ends contact with suction valve 112, outlet valve 115 respectively.
The left and right sides at " V " at body 2 tops clevis angle is furnished with the cooling water cavity 26 of high-temperature water and piston nozzle cooling oil duct 27, diesel engine main oil gallery 25 is built-in and in the V-arrangement angle at diesel-engine body 2 tops, body air cavity 24 is arranged in the V-arrangement angle of body 2, and described body air cavity 24 and the air inlet pressure stabilizing chamber 133 that is arranged on body 2 end faces have formed the air inlet pressure stabilizing cavity of diesel engine jointly.
The acting unit of diesel engine is mainly comprised of cylinder head assembly 11, cylinder liner assembly 15 and piston rod assembling 8.The concrete structure of described cylinder head assembly 11 as shown in Figure 8, mainly comprise cylinder head 110, spring for valve 111, suction valve 112 and rotocap 113 and outlet valve 115, cylinder head 110 wherein adopts the alloy cast iron integral cast of high-tensile, thermal fatigue property and heat-conducting property to form, and adopts hydraulic elongator mode to be fastened on body 2.Described suction valve 112 and outlet valve 115 each two run through cylinder head 110 and the layout that is parallel to each other, Cooling Water Jacket of Cylinder Head 114 is arranged in cylinder head 110, and " L " shape next-door neighbour outlet valve 115 that is handstand, by this seat design that carries cooling water chamber, can effectively improve the operating conditions of suction valve 112, outlet valve 115, be arranged in the inlet and outlet runner of cylinder head 110 through optimizing and can effectively reduce gas-flow resistance, improve flow coefficient, thereby improved the combustion performance of diesel engine, improved the energy-saving and emission-reduction level of diesel engine; Unobstructed with assurance water channel by highly organized cooling water runner, increase water velocity, be conducive to improve the cooling effect in the gap bridge district between suction valve 112, outlet valve 115 and corresponding air valve seat hole, reduce its thermal stress, avoid diesel engine gap bridge district that traditional inertial mass problems such as crackle occur.Described suction valve 112 and outlet valve 115 are respectively by valve actuation mechanism 10 and the spring for valve 111 incompatible control opening and closing movement separately that matches, and the rotocap 113 of suction valve 112 and outlet valve 115 ends is controlled suction valve 112 and corresponding spinning movement occurs outlet valve 115 in opening and closing movement by being arranged on respectively.Adopt the said structure layout can be so that the structural design of cylinder head assembly 11 is compacter, and there is higher mechanical strength and rigidity, can meet mechanical load, heat load needs that high-power highly-intensified diesel engine is high.Described suction valve 112 and outlet valve 115 adopt respectively the Langaloy material high temperature resistant, corrosion-resistant, creep strength is high to make whole air valve, supporting rotocap 113 for dress again, can greatly slow down the service wear of suction valve 112 and outlet valve 115, improve the functional reliability of air valve, thereby effectively improved its working life.
The concrete structure of described cylinder liner assembly 15 as shown in Figure 5, comprise cylinder liner 150, wearing ring 151 and 0 RunddichtringO 152, described cylinder liner 150 is wet liner, adopt alloy cast iron spun casting, its cylinder hole inwall is processed through induction hardening processing and platform honing, and be provided with wearing ring 151 in cylinder liner 150 port position, described 0 RunddichtringO 152 is arranged on cylinder liner 150 outsides, make cylinder liner 150 outer walls and body 2 form the cooling water cavity 26 of high-temperature water, reach the object cooling to cylinder.Can effectively reduce the wearing and tearing of cylinder liner 150 like this, and reduce the consumption of lubricating oil of diesel engine, improve operating life and its usage economy of diesel engine.
As shown in Figure 6, described piston rod assembling 8 mainly comprises piston 80, wrist pin 81 and connecting rod 82 and connecting rod cap 83, piston 80 is wherein flexibly connected with connecting rod 82 microcephalies by wrist pin 81, relative major part one end at connecting rod 82 is bolted the connecting rod cap 83 for sealing, and connecting rod 82, connecting rod cap 83 adopts four bolt-connected formulas.Described piston rod assembling 8 is arranged in the cylinder liner 150 of cylinder liner assembly 15, and when diesel engine starting, by crank assemblby 4 drive link 82 motions, connecting rod 82 driven plunger 80 do reciprocating linear motion in cylinder liner 150 cylinder bodies.By the Injection Pump in fuel injection system assembly 9, in cylinder liner 150 cylinder bodies, spray into fuel oil, by gas handling system 13, in cylinder, be filled with fresh air, the fuel oil spraying into fully mixes with air, to-and-fro motion by piston 80 carrys out compression ignite gas mixture again, and oil inflame expansion rear driving piston 80 continues to-and-fro motion with higher speed.Described piston 80 adopts combination of steel roof aluminum piston skirt, connecting rod 82 adopts abreast-type bar linkage structure, piston rod assembling 8 is by this split-type structural, both be easy to dismounting, but also make piston rod assembling 8 there is minimum exterior contour size, when diesel engine overhauls, piston rod assembling 8 can be taken out easily from cylinder liner 150, has greatly improved the maintenance efficiency of diesel engine.
Built-in crank assemblby 4, gear drive 5 and camshaft assembly 12 in the body 2 of diesel engine, crank assemblby 4 concrete structures wherein as shown in Figure 3, mainly by bent axle 44, crank-shaft link neck 40, crankshaft main journal 41 and crankweb 43, formed, crank-shaft link neck 40 wherein cooperatively interacts with the relative stub end prong of connecting rod 82, and crankshaft main journal 41 adopts sliding bearing mode to coordinate with body 2 main bearing holes.As shown in Figure 1, at bent axle 44 free end shaft extension ends, reed damping type shock reducing device 20 is installed, in reed damping type shock reducing device 20 outsides, be bolted to connection pump drive gear 22, oil pump 6 and cooling waterpump 7 work of described pump drive gear 22 drive installations on pump supporting box 21.At bent axle 44 output terminals, elastic damping coupler 17 and Manual jigger mechanism are installed, by elastic damping coupler 17, drive main and backup generator, the stator casing of main and backup generator links into an integrated entity by connecting box 3 and body 2, form diesel generating set, diesel generating set is arranged on main car frame by vibration isolator 23 elasticity again.Because bent axle 44 is rotation motion in the course of the work, the centrifugal inertia force producing in order to offset bent axle 44 rotation motions, can arrange crankshaft counter balance 42 and be fixedly connected with crankweb 43 by bolt.In crankcase side cover position, diesel engine the right, be also provided with four groups of explosion-proof valves 28, by the pressure release of explosion-proof valve 28, can guarantee that the pressure in crankcase maintains normal level, improved functional reliability and the Security of diesel engine.Described crank assemblby 4 is the full fiber extrusion alloyed steel bent axle after normalized and tempered heat treatment, and all machining forms, and tensile strength is high, is conducive to guarantee the stable operation of diesel engine.
As shown in Figure 4, described gear drive 5 is by a crankshaft gear 50, intermediate gear 51 and two distribution idle pulleys 52 and two " Y " shape structures that camshaft gear wheel 53 forms, crankshaft gear 50 be wherein fixedly connected on bent axle 44 free end shaft extension portions and with intermediate gear 51 engagement driving, two distribution idle pulleys 52 be distributed in intermediate gear 51 both sides and respectively with intermediate gear 51 engagement driving, two camshaft gear wheels 53 are distributed in intermediate gear 51 both sides, and be positioned at the distribution idle pulley 52 of intermediate gear 51 the same sides, the intermeshing transmission of camshaft gear wheel 53, driving cam axle assembly 12 revolutions again of described camshaft gear wheel 53.Consider that locomotive diesel acc power is larger, in working process of diesel engine, comprise gear drive 5, the impact force that camshaft assembly 12 bears at each interior moving element and driving mechanism is also correspondingly larger, for improving gear drive 5, the operating life of camshaft assembly 12, the coaxial up-down structure of crankshaft gear in gear drive 5 50 and intermediate gear 51 can be arranged, make the dead in line with intermediate gear 51 centers of circle through crankshaft gear 50, again two distribution idle pulleys 52 be take through the axis in crankshaft gear 50 and intermediate gear 51 centers of circle as symmetry axis be symmetrically distributed in intermediate gear 51 both sides and respectively with intermediate gear 51 engagement driving, two camshaft gear wheels 53 also be take and are symmetrically distributed in intermediate gear 51 both sides through the axis in crankshaft gear 50 and intermediate gear 51 centers of circle as symmetry axis, and be positioned at the distribution idle pulley 52 of intermediate gear 51 the same sides, the intermeshing transmission of camshaft gear wheel 53, like this can be so that gear drive 5, camshaft assembly 12 in the horizontal direction, opposite direction component on vertical direction is cancelled out each other, thereby alleviated gear drive 5, the impact shock that camshaft assembly 12 produced in the course of the work, avoid causing moving element and driving mechanism wherein to damage because of the undue oscillation of diesel engine, improve the working stability of diesel engine, reliability.
Because the diesel engine of the present embodiment is the diesel engine of four-stroke twelve-cylinder structure, cylinder liner assembly 15 is divided into left and right two rows and the V-shaped layout of left and right two row, structure is corresponding therewith, described camshaft assembly 12 is also provided with two groups and be arranged in body 2 left and right sides, each group camshaft assembly 12 all adopts single-unit fabricated structure, comprises six camshaft single-units.As shown in Figure 9, on camshaft 120 shaft parts of each single-unit of described camshaft assembly 12, be provided with tactic intake cam 122, fuel cam 123 and exhaust cam 124, between camshaft 120 shaft parts of each single-unit, by coupling shaft 121, be fixedly connected with, intake cam 122 on same camshaft 120 shaft parts, suction valve 112 on the same cylinder head assembly 11 that exhaust cam 124 drives in correspondence by air valve pusher body 101 respectively, outlet valve 115, 123 jerk fuel injection pumps that drive in corresponding fuel injection system assembly 9 by Injection Pump pusher body 19 of fuel cam on same camshaft 120 shaft parts, as Fig. 1, shown in 2.The cam profile of the intake cam 122 on described camshaft assembly 12, fuel cam 123 and exhaust cam 124 all possesses m-cross section value when larger, to guarantee that camshaft assembly 12 has high volumetric efficiency and good air-flow passing capacity, and there is good dynamic performance, impact acceleration is less, work also more steady, therefore, the vibration, the noise that during camshaft assembly 12 work, produce are also smaller, thereby are conducive to improve the energy-conserving and environment-protective level of diesel engine.
As shown in Figure 1, described gas handling system 13 comprises suction tude 130, air inlet bellows 131 and intercooler 132 and air inlet pressure stabilizing chamber 133, suction tude 130 entry ends wherein are all connected and communicate with pressurized machine 16, described pressurized machine 16 adopts high pressure ratio, high efficiency supercharger, arrange altogether two, be arranged in the output terminal of diesel engine, to improve diesel engine charging efficiency.Described intercooler 132 is two of relative set also, are positioned at air inlet pressure stabilizing chamber 133 in the middle of two exhaust cylinder sleeve assembly 15 formed " V " clevis angles above and are connected and communicate with air inlet pressure stabilizing chamber 133; Described air inlet pressure stabilizing chamber 133 is arranged on " V " clevis angle entry end at diesel-engine body 2 tops, and relative with the diesel engine main oil gallery 25 of " V " clevis angle bottom that is built in body 2 tops; Described air inlet bellows 131 is arranged on suction tude 130 outlet end, and the compensation while being both convenient to suction tude 130 installation, also can play the effect that cushions pipe vibration in gas handling system 13.Described vent systems 14 comprises exhaust branch pipe 140, exhaust manifold 141 and exhaust expansion bellows 142, exhaust branch pipe 140 two ends are wherein connected and communicate with cylinder liner assembly 15, exhaust manifold 141 respectively, described exhaust manifold 141 is connected and communicates with pressurized machine 16 by exhaust expansion bellows 142, described gas handling system 13, vent systems 14 and pressurized machine 16 have formed a MPC (English full name Modular Pulse Converter writes a Chinese character in simplified form, module type pulse transducer) pressurization system jointly.
The high-temp waste gas of discharging from cylinder of diesel engine enters exhaust manifold 141 via exhaust branch pipe 140, finally enter in pressurized machine 16, the partial heat energy of high-temp waste gas is converted into the mechanical energy of pressurized machine 16, to carry out supercharging to entering the outside air of pressurized machine 16, after supercharging, air enters in suction tude 130 again, through in finally enter cylinder liner assembly 15 after cold, therefore, diesel engine using efficient high-pressure makes full use of the energy of waste gas than supercharging technology, thereby the power character that has improved diesel engine has also greatly improved the energy-conserving and environment-protective level of diesel engine, make diesel engine can reach EPA TIERII or UIC III emission standard.
The fuel injection system assembly 9 of diesel engine adopts electrically-controlled pump nozzle PNU, and (English full name Pump Nozzle Unit writes a Chinese character in simplified form, pump nozzle) fuel injection system, without conventional high-tension oil pipe, by electronic controlled fuel EUI unit, (English full name Electric Unit Injector writes a Chinese character in simplified form described electrically-controlled pump nozzle PNU fuel injection system, electric-controlled injection unit) can greatly improve fuel-injection pressure, and control accurately fuel injection amount and injection timing, reach the object that reduces oil consumption and reduction of discharging, thereby effectively improved Economy and the emission performance of diesel engine.Because described fuel injection system assembly 9 does not have the necessary high-pressure oil pipe of traditional fuel injection system, can simplify diesel engine structure, and eliminate the fuel leakage hidden danger that may bring.
The working procedure of diesel engine of the present invention is: before diesel engine is started working, starting electrical machinery is first with dynamic crankshaft 44 rotations, bent axle 44 drives crankshaft gear 50 revolutions that are fixedly connected with it, and then driving cam shaftgear 53 rotates, by two camshaft gear wheels 53, drive respectively two camshafts, 120 revolutions that are fixedly connected with it, camshaft 120 is with the 44 rotating speed revolutions of 0.5 times of bent axle; The intake cam 122 and the exhaust cam 124 that are positioned on camshaft 120 drive valve actuation mechanism 10 according to certain inlet and outlet rule, to control the on-off action of suction valve 112, outlet valve 115, sending to through charge inter cooling fresh air in the firing chamber jointly being formed by cylinder head 110, cylinder liner 150 and piston 80, and the waste gas in described firing chamber is discharged to firing chamber.The oil-fired system of diesel engine is correspondingly to the electronic control injection oil pump feed being installed in cylinder head assembly 11, described electrical control oil spray pump drives by fuel cam 123, and make electrical control oil spray pump according to certain fuel injection characteristic to oil spout in the firing chamber jointly being formed by cylinder head 110, cylinder liner 150 and piston 80, in firing chamber, complete the abundant mixing of air and fuel oil, well-mixed oil gas is under the reciprocating of piston 80, compressed, outburst, burning expansion rear driving piston 80 continue to-and-fro motion, so far, diesel engine is got angry and is started successfully.After diesel engine starting success, starting electrical machinery quits work, and by the linear reciprocating motion drive link 82 of piston 80, by connecting rod 82 band dynamic crankshafts 44, continue rotation again, continuous rotating motion output torque by bent axle 44 does work, therefore, this working procedure of diesel engine has realized the conversion of chemical energy to kinetic energy, and formed kinetic energy is outwards exported by flywheel with the pattern of moment of torsion.
The structural design of the acting unit on diesel engine of the present invention can guarantee that cylinder head assembly 11, cylinder liner assembly 15 and piston rod assemble 8 and carry out integral hoisting, guarantees that diesel engine has good use and maintenance; Camshaft assembly 12 in diesel engine adopts single-unit fabricated structure, and working service cost is low and maintenance is convenient; The gas handling system 13 of diesel engine and vent systems 14 are all to adopt modular construction, have improved the interchangeability of component; Output terminal at diesel engine arranges Rear oil seal, the annular labyrinth seal by output terminal Rear oil seal and carry lower circuit and can effectively solve leakage of oil, the sealing problem in working process of diesel engine.After tested, cylinder liner 150 internal diameters in cylinder liner assembly 15 are 280mm, piston 80 strokes while being 300mm, and the fuel consumption rate of diesel engine is 198g/kWh, and specific oil consumption is 0.6g/kWh, and the diesel engine overhaul phase can reach more than 28000 hours.Therefore, the present invention has improved mechanical load, the heat load ability to bear of diesel engine, reliability and the working life of diesel engine are promoted, and diesel engine has lower fuel consume and consumption of lubricating oil, reduced the application cost of diesel engine, and made diesel engine can reach EPA TIERII or UIC III emission standard; Meanwhile, whole diesel engine using modular design, has improved the maintainability of diesel engine integral body.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, it should be pointed out that all any modifications of doing within the spirit and principles in the present invention, be equal to replacement and improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. an energy saving and environment friendly high-power locomotive diesel engine, it is characterized in that: comprise acting unit, crank assemblby (4), gear drive (5), fuel injection system assembly (9), valve actuation mechanism (10) and camshaft assembly (12) and pressurized machine (16), described acting unit is by cylinder head assembly (11), cylinder liner assembly (15) and the piston rod assembling (8) being arranged in cylinder liner assembly (15) cylinder body form, described crank assemblby (4) is arranged in body (2) crankshaft cavity, described gear drive (5) centralized arrangement is in the free-ended gear cavity of body (2), described camshaft assembly (12) is arranged on body (2) inner chamber and is positioned at crank assemblby (4) top, described crank assemblby (4) actuation gear transmission device (5), described camshaft assembly (12) is driven by gear drive (5), Injection Pump in described fuel injection system assembly (9), valve actuation mechanism (10) drive by camshaft assembly (12), described pressurized machine (16) is connected and communicates with vent systems (14) outlet end with gas handling system (13) entry end respectively, and described gas handling system (13) outlet end, vent systems (14) entry end communicate with cylinder head assembly (11) respectively.
2. a kind of energy saving and environment friendly high-power locomotive diesel engine according to claim 1, it is characterized in that: described crank assemblby (4) comprises bent axle (44), crank-shaft link neck (40) and crankshaft main journal (41) and crankweb (43), crank-shaft link neck wherein (40) cooperatively interacts with piston rod assembling (8), and crankshaft main journal (41) adopts sliding bearing mode to coordinate with body (2) main bearing hole.
3. a kind of energy saving and environment friendly high-power locomotive diesel engine according to claim 2, it is characterized in that: described crank assemblby (4) also comprises crankshaft counter balance (42), described crankshaft counter balance (42) is fixedly connected with crankweb (43).
4. a kind of energy saving and environment friendly high-power locomotive diesel engine according to claim 1, it is characterized in that: described gear drive (5) is by crankshaft gear (50), intermediate gear (51) and distribution idle pulley (52) and camshaft gear wheel (53) form, crankshaft gear wherein (50) be fixedly connected with crank assemblby (4) and with intermediate gear (51) engagement driving, described distribution idle pulley (52) arranges two, be distributed in intermediate gear (51) both sides and respectively with intermediate gear (51) engagement driving, camshaft gear wheel (53) arranges two, be distributed in intermediate gear (51) both sides, and be positioned at the distribution idle pulley (52) of intermediate gear (51) the same side, the intermeshing transmission of camshaft gear wheel (53), described camshaft gear wheel (53) driving cam axle assembly (12) revolution.
5. a kind of energy saving and environment friendly high-power locomotive diesel engine according to claim 4, it is characterized in that: the crankshaft gear (50) in described gear drive (5) is arranged with the coaxial up-down structure of intermediate gear (51), two distribution idle pulleys (52) take through crankshaft gear (50) and the axis in intermediate gear (51) center of circle as symmetry axis be symmetrically distributed in intermediate gear (51) both sides and respectively with intermediate gear (51) engagement driving, two camshaft gear wheels (53) be take and are symmetrically distributed in intermediate gear (51) both sides through crankshaft gear (50) and the axis in intermediate gear (51) center of circle as symmetry axis, and be positioned at the distribution idle pulley (52) of intermediate gear (51) the same side, the intermeshing transmission of camshaft gear wheel (53).
6. a kind of energy saving and environment friendly high-power locomotive diesel engine according to claim 1, it is characterized in that: described camshaft assembly (12) is single-unit fabricated structure, on the camshaft of each single-unit (120) shaft part, be provided with tactic intake cam (122), fuel cam (123) and exhaust cam (124), between the camshaft of each single-unit (120) shaft part, by coupling shaft (121), be fixedly connected with.
7. according to a kind of energy saving and environment friendly high-power locomotive diesel engine described in claim 1-6 any one, it is characterized in that: described cylinder head assembly (11) comprises cylinder head (110), spring for valve (111), suction valve (112) and outlet valve (115), it is upper that described cylinder head (110) is fastened on body (2), and described suction valve (112) and outlet valve (115) run through cylinder head (110) and the layout that is parallel to each other.
8. a kind of energy saving and environment friendly high-power locomotive diesel engine according to claim 7, it is characterized in that: described valve actuation mechanism (10) is by air valve pusher body (101), rocking arm (102), transverse arm (103) and rocker arm bracket (104) and tappet (105) form, described transverse arm (103) lays respectively at rocker arm bracket (104) both sides with tappet (105), described rocking arm (102) is movably connected on rocker arm bracket (104), described rocker arm bracket (104) is fixed on the upper plane of cylinder head (110), described tappet (105) one end contacts with air valve pusher body (101), the other end and rocking arm (102) one end in contact, rocking arm (102) the other end contacts with transverse arm (103).
9. according to a kind of energy saving and environment friendly high-power locomotive diesel engine described in claim 1-6 any one, it is characterized in that: described piston rod assembling (8) comprises piston (80), wrist pin (81) and connecting rod (82) and connecting rod cap (83), described piston (80) is flexibly connected with connecting rod (82) microcephaly by wrist pin (81), in relative major part one end of connecting rod (82), connects connecting rod cap (83).
10. a kind of energy saving and environment friendly high-power locomotive diesel engine according to claim 1, it is characterized in that: described fuel injection system assembly (9) is to adopt electrically-controlled pump nozzle PNU fuel injection system, and described electrically-controlled pump nozzle PNU fuel injection system is by electronic controlled fuel EUI unit controls fuel injection amount and injection timing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410239001.1A CN103993958A (en) | 2014-05-30 | 2014-05-30 | Energy-saving and environment-friendly type high-power locomotive diesel engine |
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| CN201410239001.1A CN103993958A (en) | 2014-05-30 | 2014-05-30 | Energy-saving and environment-friendly type high-power locomotive diesel engine |
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