CN2600598Y - Water-cooled four-cylinder diesel engine and its balance mechanism - Google Patents
Water-cooled four-cylinder diesel engine and its balance mechanism Download PDFInfo
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- CN2600598Y CN2600598Y CN 03228359 CN03228359U CN2600598Y CN 2600598 Y CN2600598 Y CN 2600598Y CN 03228359 CN03228359 CN 03228359 CN 03228359 U CN03228359 U CN 03228359U CN 2600598 Y CN2600598 Y CN 2600598Y
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- gear
- balanced controls
- crankweb
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- diesel engine
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Abstract
The utility model discloses a water-cooled four-cylinder diesel engine and a balance mechanism. The balance mechanism adopts the structure that a large gear ring is arranged on an eighth crank arm of a bent shaft, and a pair of balance shafts which are provided with reverse rotary directions, gears and balance blocks are arranged in a balance box. The utility model is mainly characterized in that the large gear ring is also provided with balance blocks for compensating the balancing mass reduced on the eighth crank arm. The technical proposal completely avoids the adverse influence of a fourth main shaft journal and adverseness to the average load of a main bearing under the operation of installing and reinforcing the large gear ring; thus, the utility model is favorable for reducing the vibration of an engine. The improved balance mechanism is applied to the engine with a large diameter for automobiles, and the original six-cylinder engine is changed into a four-cylinder engine; on the premise of maintaining the performance of the original six-cylinder engine, product structure can be compact; at the same time, the utility model can have the advantages of volume and cost reduction.
Description
Technical field
The utility model relates to water-cooled four-cylinder diesel engine and balanced controls thereof.
Background technique
The secondary reciprocal inertia force of four-cylinder internal combustion engine is four times of single cylinder engine, and its direction is on cylinder centerline, and frequency is two times of engine speed, and its numerical value is counted by formula of reduction:
4×λ×mj×r×ω
2×cos2α(N)
λ is structural parameter of connecting rod in the formula, promptly
Mj is the reciprocating mass (kg) of a cylinder
R is crank throw radius (m)
ω is the angular velocity of rotation (rad./s) of bent axle
α is crank angle (degree or rad)
This kind two-stage reciprocal inertia force causes discomfort at the Che Shanghui that takes that has relatively high expectations.The engine bore stroke is bigger, and rotating speed is higher, and this inertial force is bigger, and the discomfort that causes is stronger.Therefore big cylinder diameter engine for automobile seldom adopts four-cylinder.Especially concerning the transportation diesel of the so big cylinder diameter of steyr WD615 diesel engine 126mm, do not see the report of four-cylinder at present at home and abroad as yet.
For eliminating this The Effect of Inertia Force, must use the way of Lanchest balanced controls, its principle is opposite with a pair of sense of rotation, the axle that rotating speed doubles engine speed and has a unbalance mass, the cylinder centerline direction produce one opposite with secondary reciprocal inertia force direction, equal-sized reciprocating force then can be eliminated the influence of secondary reciprocal inertia force wholly or in part.
But, many different schemes can be arranged on concrete structure as implementing the equilibrium principle of Lanchest.
The structure that Shanghai Diesel Engine Plant takes on last bavin D4114 turbocharged and intercooled diesel engine is that the six-throw arm (i.e. the rear crank arm of the 3rd cylinder) at bent axle is gone up large diameter gear ring of installation.It is that 1/2 gear is meshed with it that a number of teeth is arranged on balanced controls, and then the rotating speed of this gear is the twice of engine speed.This gear be contained in one have equilibrium block (being unbalance mass) the axle on.Other has an axle that has an identical equilibrium block with the identical gear of the number of teeth and the gear engagement of this root axle, then the rotating speed of these two axles equal (being all the twice of engine speed) and direction is opposite.This structure can the complete equilibrium motor the secondary reciprocal inertia force.
But also there is following deficiency in the structure of last bavin:
Gear ring is installed on the six-throw arm, then to reduce mass of balance block on the six-throw arm, for this reason on the bent axle on second, third and the seven or three crankweb mass of balance block to do same minimizing, otherwise to produce reciprocal unbalanced force of strong one-level or unbalance moment.The minimizing of this crankshaft counter balance quality will certainly increase the average bearing load of main axle bush and increase the moment of resistance (comparing with the bent axle of not adorning balanced controls) that the middle main journal of bent axle bears.
Yuchai limited company is bull gear to be installed on the 8th crankweb (i.e. the 4th cylinder rear crank arm) in the structure of taking on their motor.Like this be furnished with the installation that is beneficial to gear, but must reduce the one, the 3rd or four simultaneously, and the 5th or 63 crankweb on mass of balance block, otherwise, also to produce reciprocal unbalanced force of strong one-level or unbalance moment.The minimizing of this crankshaft counter balance quality more is unfavorable for the mean load of main bearing and the moment of resistance of middle main journal than the scheme of last bavin.
Summary of the invention
To be solved in the utility model is the above-mentioned defective that existing balanced controls exist, the water-cooled four-cylinder diesel engine that a kind of follow-on balanced controls is provided and utilizes these balanced controls to make.Addressing the above problem the technological scheme that is adopted is: the balanced controls of water-cooled four-cylinder diesel engine, on the 8th crankweb of bent axle, be provided with bull gear, it is opposite and be provided with the trunnion shaft of gear and equilibrium block to be provided with a pair of sense of rotation in tandem-driving bogie, and described first trunnion shaft is provided with first gear that is meshed with described bull gear and second gear that is meshed with set gear on the described secondary balance shaft; Its main feature is at the equilibrium block that also is provided with the balancing mass that reduces on described the 8th crankweb of compensation on the described bull gear.
A kind of water-cooled four-cylinder diesel engine that adopts above-mentioned balanced controls to make, comprise cylinder, piston crank mechanism, distribution device, combustion system, gear train assembly, lubrication system, cooling system, flywheel chamber and oil sump, the bent axle of described piston crank mechanism is provided with eight crankwebs, on described the 8th crankweb, be provided with bull gear, its main feature is to be provided with balanced controls in the described oil sump, it is opposite to be provided with a pair of sense of rotation in the casing of described balanced controls, and be provided with the trunnion shaft of gear and equilibrium block, described first trunnion shaft is provided with first gear that is meshed with described bull gear and second gear that is meshed with set gear on the described secondary balance shaft; At the equilibrium block that also is provided with the balancing mass that reduces on described the 8th crankweb of compensation on the described bull gear.
Balanced controls of the present utility model, bull gear is installed on the 8th crankweb (i.e. the 4th cylinder rear crank arm), equilibrium block on the 8th crankweb is corresponding weakening, has taked to add on bull gear the method for lastblock equilibrium block simultaneously, compensates the balancing mass that reduces on the 8th crankweb.This sample plan has been avoided fully being unfavorable for the influence of the moment of resistance of main bearing mean load and four main neck owing to strengthening bull gear for installation, thereby has more been helped reducing the vibration of motor.Balanced controls after the improvement are used on the big cylinder diameter engine for automobile, as steyr WD615 diesel engine, six original cylinder machines are improved to four-cylinder, under the prerequisite of the performance that keeps former six cylinder machines, can make the structure of product more compact, can reduce volume simultaneously, reduce cost.
As further improvement of the utility model, the velocity ratio of first gear of the described bull gear and first trunnion shaft is 1: 2, and the velocity ratio between described two balance shaft gears is 1: 1, makes two trunnion shafves to double the engine speed rotation.Described bull gear is connected by seam with the 8th crankweb, then adopts bolt.Because bull gear and the 8th crankweb adopt the hot jacket method to fix usually, thereby crankweb must adopt the garden disk-shaped structure.And the blank shape of this programme crankweb is can be fully the same with the crankweb of the motor of no balanced controls.Like this, balanced controls being installed can be just the same with the crank shaft blank that the motor of balanced controls is not installed.When need were installed balanced controls, the turning operation that the 8th crankweb only needs to increase the seam that together fixing described bull gear uses again got final product.
Further improve again as of the present utility model, have at least two pairs of equilibrium blocks to be arranged on the bearing both sides of fixing described trunnion shaft on each trunnion shaft.Because equilibrium block is connected across the bearing both sides, make trunnion shaft bending deflection minimum that centrifugal force caused owing to unbalance mass, when high speed rotating, can significantly improve the working condition of bearing, help the reliability and the life-span of balanced controls.
Further improve as of the present utility model, more compact in order to make product structure, can suitably reduce the turning radius of the equilibrium block that is connected across the bearing both sides, the while also is provided with another equilibrium block between described two pairs of equilibrium blocks, to supply amount of unbalance.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is the structural representation of the utility model water-cooled four-cylinder diesel engine.
Fig. 2 is the rear view of Fig. 1.
Fig. 3 is the structural representation of the utility model balanced controls.
Fig. 4 is that the A-A of Fig. 3 is to sectional view.
Fig. 5 is the structural representation of the utility model bull gear.
Fig. 6 is the structural representation of first trunnion shaft.
Fig. 7 is the structural representation of secondary balance shaft.
Fig. 8 be among Fig. 3-7 embodiment first trunnion shaft B-B to cutaway view Amplified image.
Fig. 9 is the structural representation that the utility model balanced controls have intermediate equilibria piece mode of execution.
Figure 10 be among Fig. 9 embodiment trunnion shaft C-C to cutaway view Amplified image.
Embodiment
Shown in the accompanying drawing: 1-fan, 2-resuscitation apparatus, 3-valve mechanism cover, 4-outlet pipe, the 5-cylinder head, 6-pressurized machine, 7-flywheel casing, 8-balanced controls, the 9-bent axle, 10-oil sump, 11-oil filter, the 12-machine oil cooler, 13-crank pulley, 14-suction tude, the 15-outlet pipe, 16-thermostat, 17-gear chamber, the 18-Injection Pump, 19-Injection Pump carriage, 20-actuating motor, the 21-injection pump assembly, 22--middle cooling pipe, equilibrium block on the 23-bull gear, the 31-crankweb, 32-bent axle, 33-tandem-driving bogie, 34-first trunnion shaft, 35-balance shaft gear, 36,37,38, the 39-equilibrium block, the 40-secondary balance shaft, 41-balance shaft gear, 42-seam, 43, the 44-bearing, 45-bull gear, 46-bolt, 47-intermediate equilibria piece, the bent neck that 48-gear, 49-cooperate with bearing
With reference to Fig. 1,2, water-cooled four-cylinder diesel engine, cylinder diameter are 126mm, and stroke is 130mm, and engine total displacement is 6.48L.Specifeca tion speeification is as follows:
Rated power: 177kW/2200r/min
Maximum Torque: 970N.m/1300～1500r/min
Total output minimum specific fuel consumption: 198g/kW.h
Discharging reaches Europe II standard.
Its main structure and steyr WD615 serial diesel engine are consistent, comprise cylinder, piston crank mechanism, distribution device, combustion system, gear train assembly, lubrication system, cooling system, flywheel chamber and oil sump, wait cylinder core distance 150mm, a cylinder one lid, valve mounting point constant.
The cylinder head of diesel engine, piston crank mechanism, distribution device, gear train assembly, lubrication system, cooling system and gear chamber, flywheel, flywheel casing etc. are general with WD615 Europe II charge inter cooling type as far as possible, help the organization of production of product and sell supporting.
Consider that product will reach Europe II emission standard, cylinder head, cylinder liner, gear chamber, combustion system, gas distribution system is all identical with steyr WD615 Europe II type.
Shallow reducing type is chosen by test in the piston crown firing chamber, and the power character of integral body, Economy, smoke intensity, discharging etc. have all been played important function.The design direction of piston skirt molded line is to guarantee that the gap is little between piston and the cylinder liner, can not pull again.
The connecting rod small end head is a taper structure, to improve its reliability.
Because domestic four-cylinder diesel engine cylinder diameter is all smaller, adopts the flange-type oil pump mostly.Thereby water-cooled four-cylinder diesel engine of the present utility model still adopts the bracket type oil pump more convenient from general arrangement, and the air compressor of front end can be constant, only needs to shorten coupling.Oil nozzle then adopts many spray orifices, small aperture, and injection pressure of injector is then up to 300bar, and this helps improving performance, reduces discharging.
Transform six cylinder machines as four-cylinder, wherein the design of balanced controls is key points.Four-cylinder is different from six cylinder machines, and there is unbalanced two-stage reciprocating inertia force in it, can not offset by the design that changes crankshaft counter balance, and the vibration that it causes will have a strong impact on the reliability of motor and the travelling comfort of automobile.
With reference to Fig. 3--8, on the 8th crankweb 31 (i.e. the 4th cylinder rear crank arm) of bent axle 32, be provided with bull gear 45, described bull gear 45 is connected by seam 42 with the 8th crankweb 31, then adopts bolt 46 fixing.On described bull gear 45, also be provided with equilibrium block 23, compensate the balancing mass that reduces on described the 8th crankweb 31.Balanced controls 8 of the present utility model are arranged in the oil sump 10, it is opposite and be provided with the trunnion shaft 34,40 of gear and equilibrium block to be provided with a pair of sense of rotation in the casing 33 of balanced controls, and described first trunnion shaft 34 is provided with first gear 35 that is meshed with described bull gear 45 and second gear 48 that is meshed with set gear 41 on the described secondary balance shaft 40; The velocity ratio of first gear of the described bull gear and first trunnion shaft is 1: 2, and the velocity ratio between described two balance shaft gears is 1: 1, makes two trunnion shafves to double the engine speed rotation.There are two pairs of equilibrium blocks 36,37,38,39 to be symmetricly set on bearing 43,44 both sides of fixing described trunnion shaft respectively on each trunnion shaft.The bottom that is shaped as of equilibrium block is the fan type of fillet.
Fig. 9,10 is the structural representation of another mode of execution of the utility model.Less with the turning radius that last mode of execution difference is equilibrium block, between described two pairs of equilibrium blocks, also be provided with another equilibrium block 47 simultaneously, to supply amount of unbalance, make product structure more compact.From Figure 10 as seen, the sectional area of intermediate equilibria piece 47 is the fan type, and the turning radius is less.
Water-cooled four-cylinder diesel engine of the present utility model has high power, high reliability, low emission, low oil consumption, low vibration and low noise characteristics.Experiment showed, that its vibration reaches similar six cylinder machine standards with noise.
Water-cooled four-cylinder diesel engine of the present utility model and balanced controls thereof are not limited to above-mentioned mode of execution, can be widely used in 5～8 tons of cargo vehicles and the 8～10m left and right sides middle bus.
Claims (10)
1, the balanced controls of water-cooled four-cylinder diesel engine, on the 8th crankweb (31) of bent axle (32), be provided with bull gear (45), it is opposite and be provided with the trunnion shaft (34,40) of gear and equilibrium block to be provided with a pair of sense of rotation in the tandem-driving bogie (33), and described first trunnion shaft (34) is provided with first gear (35) that is meshed with described bull gear (45) and second gear (48) that is meshed with set gear (41) on the described secondary balance shaft (40); It is characterized in that on described bull gear (45), also being provided with the equilibrium block (23) that described the 8th crankweb of compensation (31) is gone up the balancing mass that reduces.
2, balanced controls as claimed in claim 1 is characterized in that the described bull gear (45) and the velocity ratio of first balance shaft gear (35) are 1: 2, and the velocity ratio between described two balance shaft gears (35,41) is 1: 1.
3, balanced controls as claimed in claim 2 is characterized in that the blank shape of described the 8th crankweb (31) is identical with other crankwebs.
4, balanced controls as claimed in claim 3 is characterized in that described bull gear (45) and the 8th crankweb (31) adopt bolt (46) fixing.
5, balanced controls as claimed in claim 4 is characterized in that described bull gear (45) and the 8th crankweb (31) pass through seam (42) location.
6,, it is characterized in that having at least on the every trunnion shaft two pairs of equilibrium blocks (36,37,38,39) to be separately positioned on bearing (43, the 44) both sides of fixing described trunnion shaft as any one described balanced controls of claim 1-5.
7, balanced controls as claimed in claim 6 is characterized in that described two pairs of equilibrium blocks that are connected across the bearing both sides are to be symmetrical arranged.
8, balanced controls as claimed in claim 7 is characterized in that also being provided with another equilibrium block (47) between described two pairs of equilibrium blocks.
9, a kind of water-cooled four-cylinder diesel engine that adopts balanced controls as claimed in claim 1 to make, comprise cylinder, piston crank mechanism, distribution device, combustion system, gear train assembly, lubrication system, cooling system, flywheel chamber and oil sump, the bent axle of described piston crank mechanism (32) is provided with eight crankwebs, on described the 8th crankweb (31), be provided with bull gear (45), it is characterized in that being provided with balanced controls in the described oil sump (10), it is opposite to be provided with a pair of sense of rotation in the casing of described balanced controls (32), and be provided with the trunnion shaft (34 of gear and equilibrium block, 40), described first trunnion shaft (34) is provided with first gear (35) that is meshed with described bull gear (45) and second gear (48) that is meshed with the last set gear (41) of described secondary balance shaft (40); On described bull gear (45), also be provided with described the 8th crankweb of compensation (31) and go up the equilibrium block (23) of the balancing mass that reduces.
10, water-cooled four-cylinder diesel engine as claimed in claim 9, the cylinder diameter that it is characterized in that described diesel engine is 126mm, stroke is 130mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03228359 CN2600598Y (en) | 2003-01-22 | 2003-01-22 | Water-cooled four-cylinder diesel engine and its balance mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03228359 CN2600598Y (en) | 2003-01-22 | 2003-01-22 | Water-cooled four-cylinder diesel engine and its balance mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2600598Y true CN2600598Y (en) | 2004-01-21 |
Family
ID=34164263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03228359 Expired - Lifetime CN2600598Y (en) | 2003-01-22 | 2003-01-22 | Water-cooled four-cylinder diesel engine and its balance mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2600598Y (en) |
-
2003
- 2003-01-22 CN CN 03228359 patent/CN2600598Y/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20130122 Granted publication date: 20040121 |