CN107725186A - A kind of piston reciprocating large-sized low-speed engine - Google Patents

A kind of piston reciprocating large-sized low-speed engine Download PDF

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Publication number
CN107725186A
CN107725186A CN201710814997.8A CN201710814997A CN107725186A CN 107725186 A CN107725186 A CN 107725186A CN 201710814997 A CN201710814997 A CN 201710814997A CN 107725186 A CN107725186 A CN 107725186A
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China
Prior art keywords
engine
speed
rated
bent axle
contrast
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CN201710814997.8A
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Chinese (zh)
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肖光宇
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Individual
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Individual
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Priority to CN201710814997.8A priority Critical patent/CN107725186A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B61/00—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing
    • F02B61/06—Combinations of engines with mechanical gearing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B2075/1804—Number of cylinders
    • F02B2075/1808—Number of cylinders two

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)

Abstract

The present invention discloses the high-power piston reciprocating low speed engine that a kind of large ship uses.Keep that existing large-scale high-power piston reciprocating low speed engine (calls " contrast engine ") piston diameter in the following text and average speed is basically unchanged, the rated engine speed of bent axle (1,3) is increased to 3 times of contrast engine, make piston stroke for the 1/3 of contrast engine piston stroke, then the nominal power of engine is identical with contrast engine calibration power, and its volume is only then contrast engine volume 1/4；Then the ratio between crankshaft toothed wheel reference diameter and output shaft gear reference diameter are set to 1: 3, make the rated engine speed that engine exports identical with the rated engine speed of contrast engine output；Function in engine is unchanged and after volume reduces, save the steel of a large amount of costlinesses, overcome the technical difficulty of large-scale workpiece manufacture and maintenance, save substantial amounts of manufacturing cost and maintenance cost, and engine center of gravity declines, service behaviour is more superior.

Description

A kind of piston reciprocating large-sized low-speed engine
Technical field
The invention belongs to field of internal combustion engine, and in particular to the high-power piston reciprocating low speed that a kind of large ship uses starts Machine.
Background technology
The large-scale high-power piston reciprocating low speed engine (lower abbreviation " contrast engine ") that existing large ship uses, it is Meet high-power slow-speed of revolution direct-driven airscrew work, using the technical side of the large-diameter overlength piston stroke of traditional idea Case realizes the requirement of its function；Such as R1e × 96c engines, long 27.3 meters, high 13.5 meters, overall weight is up to 2300 tons, so Huge volume, the not only a large amount of expensive manufacture materials of consumption, and return manufacture, installation and maintenance and repair and bring and be greatly stranded Difficulty, engine manufacturing cost and use cost is increased, additionally correspondingly occupy carrying and the installing space of equipment.The world today It is upper only to produce this large-sized low-speed engine for the few country of number, it much can not meet the requirement of social development.
The content of the invention
The defects of in order to overcome above-mentioned " contrast engine " and weak point, the present invention disclose one kind and both started with contrast The advantages of machine function, overcome again its it is bulky caused by shortcoming and service behaviour it is more superior large-scale high-power low-speed hair Motivation；Its technical scheme is as follows.
A kind of piston reciprocating large-sized low-speed engine, mainly by starting cylinder and power range system to form, it is characterised in that： Described to start cylinder be L-type engine start cylinder, and the similar cylinder of V-type engine two is a row, but the vertical parallel parallel connection of the cylinder of left and right two, by It is overall (such as Fig. 1 and Fig. 2 are shown) that multiple rows of twin-tub in parallel forms engine.
The power range system, by left cylinder bent axle (1), right cylinder bent axle (3), power output shaft (lower abbreviation " output shaft ") (2), left crankshaft toothed wheel (7), right crankshaft toothed wheel (9), output shaft gear (8) are formed；Output shaft (2) is arranged on two bent axles of left and right Centre between (1,3), left and right bent axle (1,3) synchronization；Left and right crankshaft toothed wheel (7,9) indexing diameter of a circle is identical, is all Driving gear, engage to form gear train with output shaft gear (8) respectively.
Left and right two starts the diameter of cylinder piston (6,6 ') identical, and is equal to the diameter of contrast engine piston (10).
The rated engine speed of the bent axle of left and right two (1,3) is same rated engine speed, and the rated engine speed turns for contrast engine calibration 3 times of speed (are contrast engine piston (10) reciprocating frequence i.e. in the reciprocal frequency of unit interval intrinsic motivation piston (6,6 ') 3 times), that is, contrast engine rated engine speed be left and right bent axle rated engine speed 1/3.
In piston (6) average speed with contrast engine piston (10) average speed phase simultaneously as piston (6) is reciprocal Frequency is 3 times of contrast engine piston (10) reciprocating frequence, then the stroke S of piston (6)1It shorten to contrast engine piston (10) stroke S21/3, the height and width of engine single cylinder volume thus can be greatly reduced, and then it is whole to reduce engine The height and width of body.
Due to piston (6) is identical with the average speed of piston (10) and reciprocating frequence increase, the backlash of piston (6) The number of (operation of two stroke engine air inlet section) increases, and can make the power of single cylinder than the single cylinder work(of contrast engine Rate reduces accordingly, using relative to increased backlash, increase piston (6) stroke and length, make the strokes of piston (6) S1Slightly larger than contrast engine piston (10) stroke S21/3, the power per cylinder of engine and the single cylinder of contrast engine are made with this Power is identical.
The rated engine speed of bent axle is 3 times of constant, stroke S of piston (6) of contrast engine calibration rotating speed1Slightly larger than contrast Engine piston (10) stroke S21/3 can have increased slightly the average speed of piston；But the stroke S of left piston (6)1It is slightly larger than Contrast engine piston (10) stroke S21/3 when, its throw of crankshaft is less than the 0.4 of contrast engine crank radius, therefore bent axle The linear velocity of pin is respectively smaller than the linear velocity for contrasting engine, and the operating of engine also correspondingly smoothes out；The work slightly increased Influence of the average speed to engine is filled in can be neglected.
Above technical measures and implementation principle show：Piston diameter is constant, piston stroke is lived slightly larger than contrast engine Stroke 1/3 is filled in, and bent axle rated engine speed is when contrasting 3 times of engine calibration rotating speed, mean piston speed is sent out slightly larger than contrast Motivation mean piston speed, engine single cylinder nominal power is identical with the rated engine speed for contrasting engine single cylinder, but engine Single cylinder volume (being shown referring to Fig. 4 and Fig. 5 contrasts) about contrasts the 1/4 of engine single cylinder volume.
In the gear train, left and right crankshaft toothed wheel (7,9) is all driving gear, and output shaft gear (8) is driven gear, respectively The rotating speed of gear is the rotating speed of each gear shaft；Rotating speed of the left and right bent axle in engine calibration power, for two bent axles of left and right Rated engine speed；The rotating speed of output shaft (2) during the bent axle rated engine speed of left and right is the rated engine speed of output shaft (2), namely engine The rated engine speed of external world's output；The rated engine speed of the bent axle of left and right two (7,9) is same rated engine speed, and the rotating speed is contrast engine 3 times of rated engine speed, that is, the rated engine speed for contrasting engine are the 1/3 of two bent axle rated engine speeds of left and right.
Fig. 2 and Fig. 3 are shown：The rotating speed of output shaft gear is less than the rotating speed of crankshaft toothed wheel, and then can derive output shaft The rotating speed of gear can also be equal to or more than the rotating speed of bent axle, i.e., by change in gear train crankshaft toothed wheel reference diameter with it is defeated The ratio between shaft gear compound graduation circular diameter, it is possible to obtain the rotating speed of the output shaft of design requirement.
In gear train, the ratio between bent axle reference diameter and output shaft reference diameter are 1: 3, make the rated engine speed of output shaft For the 1/3 of the bent axle rated engine speed of left and right two, even if the rated engine speed of the output of engine and contrasting the rated engine speed phase of engine Together.
The calculating of the ratio between crankshaft toothed wheel reference diameter and output shaft gear reference diameter：If contrast the demarcation of engine Rotating speed is h, and crankshaft toothed wheel reference diameter is D in gear train1, rotating speed h1, output shaft gear reference diameter is D2, rotating speed For h2.It is known：h1=3h, h2=1h；By formula D1∶D2=h2∶h1, obtain D1∶D2=1h: 3h=1: 3.
According to the numerical value between the crankshaft toothed wheel distance of center circle output shaft gear center of circle of specific design, drawn with reference to the above method D1∶D2Ratio, it is possible to calculate the concrete numerical value of crankshaft toothed wheel reference diameter and output shaft gear reference diameter, So as to make the gear train of design requirement.
In summary, engine of the invention, when engine cylinder number is identical with contrast engine cylinder number, the mark of engine It is identical with contrast engine to determine the rated engine speed of power and output, but the volume of engine can then be reduced to contrast engine volume 1/4 or so.
A kind of low speed engine of the present invention, described in background technology " contrast engine ", do not refer to singly existing described in citing Engine, in addition to, existing various large-scale water transportations corresponding with the engine calibration power and rated engine speed of each design Instrument sets various low speed engines (such as L-type or V-type engine) used respectively；Its technical scheme is also not only only limitted to make Produce engine that is corresponding with citing engine, significantly reducing volume；Also can also produce respectively with it is existing various large-scale Low speed engine (i.e. various " contrast engines ") is corresponding, significantly reduces the low speed engine of volume.
The present invention uses " contrast engine " to be stated for control, one is used skill can be clearly illustrated directly Art means and its principle and caused good effect, it can more importantly make full use of the skill of existing manufacture contrast engine Art, technological process and production equipment, reduce the cost of development and the manufacturing of inventive engine.
What inventive engine used the start diameter of cylinder piston, stroke, bent axle rated engine speed, output shaft rated engine speed, The technical parameter numerical value of the ratio between crankshaft toothed wheel reference diameter and output shaft gear reference diameter, can be according to different to engine Specific requirement set different numerical value.
Good effect
In summary, engine of the invention, can keep starting with contrast in the nominal power and rated engine speed of engine In the case of machine identical, its volume be about contrast engine volume 1/4, thus, save substantial amounts of steel, overcome it is large-scale Workpiece manufactures and the difficulty of assembling, saves the expense of a large amount of manufactures and maintenance and repair, reduces setting for engine occupancy Standby carrying and installing space；Also will necessarily the large-scale high-power low-speed engine of expanding production producer, break a few countries monopolization The situation of large-sized low-speed engine is produced, obtains significant economic effect and social benefit.
Because engine with the multiple rows of of the vertical parallel parallel fashion of L-type engine start cylinder twin-tub starts cylinder to be formed, start Machine has that L-type engine cylinder-body and crankshaft structure are simple, manufacturing cost is low, stability is high, the thermal efficiency is high, smooth running and low speed Torque is good, the advantages of being easy to assemble and repair, while has V-type engine length is short to be easy to arrange, is adapted to increase compared with multi-cylinder number The advantages of engine power.
Overcome L-type engine increase engine cylinder number can make engine volume it is long be not easy to installation the shortcomings that, simultaneously Overcome that V-type engine is complicated, cost is high, the shortcomings that being unfavorable for maintaining and safeguard.
The bent axle of left and right two and gear operation speed are identical, in the opposite direction, have a pair of outstanding balance s functions, engine Operating ride comfort is better than L-type engine and V-type engine.
Because the height (being drawn by Fig. 4 and Fig. 5 contrasts) of engine is less than the 1/2 of contrast engine height, twin-tub is in parallel The bottom of rear engine is wide compared with L-type or V-type engine bottom, and the weight of an output shafts and gear train more among bottom, hair The center of gravity of motivation substantially reduces, with more resistance sea wave bumping and the function of leaning over.
Brief description of the drawings
Fig. 1：Twin-tub vertical profile front view in parallel；Fig. 2：Power range system plan；Fig. 3：The outer front view of gear train body； Fig. 4：Single cylinder volume diagram after contrast engine piston stroke reduces to 1/3；Fig. 5：Contrast engine piston stroke does not subtract single cylinder volume Figure.
Embodiment
Embodiment 1：
Fig. 1 is shown：The left and right parallel vertical of the design two L-type engines in parallel for a row start cylinder, its piston (6, 6 ') diameter is identical with contrast engine (Fig. 5 is shown) piston (10) diameter, the bigger contrast engine piston stroke 1/ of piston stroke 3；The rated engine speed for having set two bent axles of left and right (1,3) is all 3 times of (demarcation of contrast engine for contrasting engine calibration rotating speed Rotating speed for two bent axle rated engine speeds 1/3), i.e., the frequency of piston reciprocating is reciprocal 3 times of the frequency of contrast engine piston；Therefore scheme 1 shows that two start the nominal power of cylinder single cylinder identical with the nominal power of the contrast engine single cylinder shown in Fig. 5.
Engine single cylinder shown in Fig. 4：The diameter and stroke S of its piston (6)1With single cylinder in the twin-tub in parallel shown in Fig. 1 Identical, then this two single cylinders volume is also identical；Found out by Fig. 4 and Fig. 5 contrasts, due to S1=S2/ 3, cause connecting rod (5), bent axle (4), Throw of crankshaft r1It is approximately equal to connecting rod (11), crank (13), crank throw r respectively21/3, Fig. 4 shown in single cylinder volume be about Fig. 5 The 1/4 of the contrast engine single cylinder volume shown；The volume of Fig. 1 parallel connection twin-tubs is about the 1/ of Fig. 5 contrast engine single cylinder volumes 2, but its nominal power is then 2 times of contrast engine power per cylinder.In engine start cylinder with contrasting engine start cylinder phase Meanwhile its nominal power is identical with contrast engine, its volume is then the 1/4 of contrast engine volume.
Fig. 2 and Fig. 3 are shown：Engine output shaft (2) is arranged on the centre between left and right bent axle (1,3)；It is bent in gear train The ratio between shaft gear reference diameter and output shaft gear reference diameter are 1: 3, and the rated engine speed and contrast for making output shaft start Machine is identical, is all the 1/3 of two bent axle rated engine speeds；Two crankshaft toothed wheel reference diameters are identical, and rotating speed is identical, direction of rotation phase Instead.
Above embodiment, inventive engine is set to start when starting cylinder number identical with contrast engine cylinder number The nominal power and rated engine speed of machine are identical with contrast engine, but the volume of engine is about contrast engine volume 1/4, And the operating of engine and other aspect as manufacture, safeguard, center of gravity decline, fuselage length is short the advantages that be better than it is existing all types of (L-type or V-type) contrasts engine.
Embodiment 2：
Technical parameter described in embodiment of above by way of example only, can also be according to design engine calibration work( Rate, bent axle rated engine speed, output shaft rated engine speed or otherwise specific requirement, to engine piston diameter, stroke, bent axle Rated engine speed, output shaft rated engine speed and correlation crankshaft toothed wheel reference diameter and output shaft gear reference diameter it Than etc. parameter modify.Such as change the ratio between crankshaft toothed wheel reference diameter and output shaft gear reference diameter, make output shaft Rated engine speed be more than or less than contrast engine rated engine speed, meet engine output rated engine speed be more than or less than pair Than the requirement of engine calibration rotating speed；Cylinder piston diameter or stroke are started in change, meet the requirement of engine single cylinder nominal power.
Embodiment 3：
Such as design engine and be difficult to have suitable contrast engine, or its technical parameter and running parameter and contrast engine , can be according to technical solution of the present invention and its principle independent design items technical parameter and running parameter when differing larger.

Claims (6)

  1. A kind of 1. piston reciprocating large-sized low-speed engine, mainly by starting cylinder and power range system to form, it is characterised in that：Institute State that to start cylinder be L-type engine start cylinder, the similar cylinder of V-type engine two is a row, but the vertical parallel parallel connection of the cylinder of left and right two, by more Arrange the entirety that the twin-tub in parallel forms engine；
    The power range system, by left cylinder bent axle (1), right cylinder bent axle (3), output shaft (2), left crankshaft toothed wheel (7), right bent axle Gear (9), output shaft gear (8) are formed；Output shaft (2) is arranged on the centre between left and right bent axle (1,3), left and right bent axle (1, 3) synchronization；Left and right crankshaft toothed wheel (7,9) reference diameter is identical, is all driving gear, is nibbled respectively with output shaft gear (8) Close, form gear train.
  2. 2. a kind of piston reciprocating large-sized low-speed engine as claimed in claim 1, is further characterized in that：Cylinder is started to live in left and right two Plug diameter (6,6 ') is identical, and with the diameter for being equal to contrast engine piston (10)；The stroke S of left cylinder piston (6)1Slightly larger than pair Than engine piston (10) stroke S21/3.
  3. 3. a kind of piston reciprocating large-sized low-speed engine as claimed in claim 1, is further characterized in that：Left and right bent axle (1,3) Rotating speed in engine calibration power, it is the rated engine speed of left and right bent axle；Output shaft (2) during the bent axle rated engine speed of left and right Rotating speed, is output shaft rated engine speed, and this rotating speed is the rated engine speed that the engine outwardly exports.
  4. 4. a kind of piston reciprocating large-sized low-speed engine as claimed in claim 1, is further characterized in that：Left and right bent axle (1,3) Rated engine speed be same rated engine speed, the rated engine speed is 3 times of contrast engine calibration rotating speed, that is, contrasts the mark of engine Determine 1/3 that rotating speed is left and right bent axle rated engine speed.
  5. 5. a kind of piston reciprocating large-sized low-speed engine as claimed in claim 1, is further characterized in that：Power range system In gear train, the ratio between crankshaft toothed wheel reference diameter and output shaft gear reference diameter are 1: 3, make the rated engine speed of output shaft For the 1/3 of left and right bent axle rated engine speed, i.e., the rated engine speed of described engine output is identical with the rated engine speed of contrast engine.
  6. 6. a kind of piston reciprocating large-sized low-speed engine as described in claim 2,4 or 5, is further characterized in that：It is described to start Cylinder piston diameter, stroke, bent axle rated engine speed, output shaft rated engine speed, crankshaft toothed wheel reference diameter and output shaft gear point The numerical value of the ratio between circular diameter parameter is spent, different numerical value can be set according to the different specific requirement of engine.
CN201710814997.8A 2017-08-26 2017-08-26 A kind of piston reciprocating large-sized low-speed engine Pending CN107725186A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710814997.8A CN107725186A (en) 2017-08-26 2017-08-26 A kind of piston reciprocating large-sized low-speed engine

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Application Number Priority Date Filing Date Title
CN201710814997.8A CN107725186A (en) 2017-08-26 2017-08-26 A kind of piston reciprocating large-sized low-speed engine

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109296455A (en) * 2018-11-03 2019-02-01 肖光宇 A kind of piston reciprocating tank engine
CN109372954A (en) * 2018-11-03 2019-02-22 肖光宇 Piston reciprocating engine calibration speed adjustment system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01273834A (en) * 1988-04-25 1989-11-01 Suzuki Motor Co Ltd Multicylinder engine equipped with transmission for motorcycle
JP2003083105A (en) * 2001-09-07 2003-03-19 Honda Motor Co Ltd Engine equipped with biaxial crankshaft and vehicle
US20060278181A1 (en) * 2005-06-10 2006-12-14 Gile Jun Yang Park Internal combustion engine with freewheeling mechanism

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01273834A (en) * 1988-04-25 1989-11-01 Suzuki Motor Co Ltd Multicylinder engine equipped with transmission for motorcycle
JP2003083105A (en) * 2001-09-07 2003-03-19 Honda Motor Co Ltd Engine equipped with biaxial crankshaft and vehicle
US20060278181A1 (en) * 2005-06-10 2006-12-14 Gile Jun Yang Park Internal combustion engine with freewheeling mechanism

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109296455A (en) * 2018-11-03 2019-02-01 肖光宇 A kind of piston reciprocating tank engine
CN109372954A (en) * 2018-11-03 2019-02-22 肖光宇 Piston reciprocating engine calibration speed adjustment system

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Application publication date: 20180223