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CN205744144U - Twin crankshaft engine - Google Patents

Twin crankshaft engine Download PDF

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Publication number
CN205744144U
CN205744144U CN201620591653.6U CN201620591653U CN205744144U CN 205744144 U CN205744144 U CN 205744144U CN 201620591653 U CN201620591653 U CN 201620591653U CN 205744144 U CN205744144 U CN 205744144U
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CN
China
Prior art keywords
piston
cylinder
guide bar
cylinder body
cervical region
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn - After Issue
Application number
CN201620591653.6U
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Chinese (zh)
Inventor
王蓬波
王平
刘银平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xuzhou Xianbo Engine Mechanical Technology Co Ltd
Original Assignee
Xuzhou Xianbo Engine Mechanical Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
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Priority to CN201620591653.6U priority Critical patent/CN205744144U/en
Application granted granted Critical
Publication of CN205744144U publication Critical patent/CN205744144U/en
Withdrawn - After Issue legal-status Critical Current
Anticipated expiration legal-status Critical

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  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

The utility model discloses a kind of twin crankshaft engine, belong to technical field of engines.It includes piston, two bent axles constituting double-crank mechanism, also includes cylinder body, and cylinder body includes cylinder body and Curved shaft support portion;The lower end of piston is piston guide bar, has piston rod guide groove in cylinder body, the lower ending opening of piston equipped with piston end cap, fixing is connected for removable between piston end cap with piston guide bar;Described piston is the piston without skirt that piston guide end separates with piston seal end, and the piston head that described piston seal end is the most described, described piston guide end is described piston guide bar and piston rod guide groove.This utility model good manufacturability, piston uses iso-stress design, adds intensity, and connecting rod has wear design with the connecting portion of piston, improves the reliability of anti-wear performance and complete machine.

Description

Twin crankshaft engine
Technical field
This utility model relates to a kind of twin crankshaft engine, belongs to technical field of engines.
Background technology
At present, either gasoline engine or diesel engine, BTHE is more much lower than theoretical thermal efficiency, causes this existing The one of the main reasons of elephant be the parts such as the cylinder sleeve, the piston that directly contact with high-temperature fuel gas be the metal poor by insulation effect Material manufactures, and the metal material persistently cooling system of job demand dependence reliably constantly cools down what it was drawn from airtight combustor Heat energy.Ceramic material is a kind of preferable material of insulation effect, the portion that the parts such as cylinder sleeve, piston directly contact with high-temperature fuel gas If point using a ceramic material manufacture just can improve BTHE, but be because the fragility of ceramic material and cause low reliably Property become its application technology barrier on the engine.
Patent (number of patent application: CN 201410653964.6) that the present inventor has applied for although to a certain extent Solve the problems referred to above, but, its process for machining and manufacturing is more complicated, and the friction surface abrasion of relative motion is more serious, and some are thin Joint problem is to be resolved and perfect.
Summary of the invention
In place of overcoming above-mentioned the deficiencies in the prior art, this utility model provides a kind of twin crankshaft engine, perfect Double-crank mechanism electromotor, effectively reduces piston and the abrasion of cylinder sleeve and impact, improves ceramic material and applies on the engine Reliability, improves BTHE.Meanwhile, this utility model have employed variable compression ratio design, by regulating piston variable length Degree, changes the piston compression ratio at this electromotor of top dead centre moment.When electromotor is in middle small load condition, use big compression Ratio improves the thermal efficiency;When electromotor is in full load mode, small reduction ratio is used to carry out knock prevention.
This utility model is achieved by the following technical solution: a kind of twin crankshaft engine, and it includes cylinder and can be The piston of straight reciprocating motion is made in cylinder,
The both sides of described cylinder are disposed with two bent axles be arrangeding in parallel, cut with scissors between the crank-pin that two crankshaft relative are answered It is connected to connecting rod, constitutes double-crank mechanism;
Also including cylinder body, cylinder body includes the cylinder body forming described cylinder and for accommodating and supporting described Double crank mechanism The Curved shaft support portion of structure;
The top of described piston is piston head, and piston head lower end is cervical region, and cervical region lower end is the piston guide bar of cylindricality, Make on piston guide bar and have slot, in the described slot described in rod slide insertion, make in described cylinder body and have with described The piston rod guide groove that piston guide bar is adaptive, the lower ending opening of described slot equipped with piston end cap, piston end cap is led with piston It it is removable fixing connection between bar;
Described piston is the piston without skirt that piston guide end separates with piston seal end, described piston seal end i.e. institute The piston head stated, described piston guide end is described piston guide bar and piston rod guide groove;
Described cylinder has multiple, and multiple cylinders are the most single-row or biserial arrangement, and described piston, connecting rod, piston are led Corresponding with the quantity of cylinder and position with the crank-pin on each bent axle to bar.
The part that described piston, cylinder directly contact with high-temperature fuel gas uses ceramic material.
Described connecting rod includes the link body being positioned at described slot, and the two ends of link body are equipped with connecting rod FE Tiler, even Bar FE Tiler and link body are forming removable fixing be connected with the hinged place of crank-pin;Described link body and described slot The lower edges of contact makes wearing layer.
Described wearing layer be the wearing layer being plated on the surface of described link body or the tiles being separately made wear-resisting Material layer or the circular arc bulk wear-resistant material layer being separately made.
Described piston guide bar is cylindrical.
The end of described each bent axle is provided with travelling gear, and between two travelling gears, engagement is provided with output gear, Output gear is arranged on the mandrel of cylinder body, and described cylinder body has the case accommodating described travelling gear.
Having the axis hole that the main shaft for described bent axle passes in described cylinder body, each axis hole lower end is equipped with FE Tiler.
Described cervical region is the cross cylindricality being made up of four floors, and the outside of four floors is in approximation iso-stress circular arc Shape;Or the outline of described cervical region is the revolution shape with approximation equally stressed curved surface.
Described piston is variable-compression-ratio piston, is connected and has guiding sliding between described cervical region with described piston guide bar Block, guide runner and described cervical region are slidably connected and are provided with stopping means, and described guide runner with described piston guide bar is Removable fixing connection, flexible part groove in described cervical region, elastic component groove is built with elastic component, described cervical region and described piston Compression clearance is left between guide post.
Described elastic component is several disc springs.
The beneficial effects of the utility model are:
This utility model by stress action spot by high temperature, high pressure and piston at a high speed and cylinder sleeve reciprocating zone-transfer to The easy regions of lubrication of other low temperature, it is achieved exist without other active force in addition to piston ring back pressure between piston and cylinder, it is achieved make The pressure loading of high-temperature fuel gas it is solely subjected to, it is achieved do not increasing pottery material with parts such as the cylinder sleeve of ceramic material manufacture, pistons Its reliability and service life is improved on the premise of material toughness and manufacturing cost.Meanwhile, piston of the present utility model and connecting rod Connect, connecting rod is all removable structure with the connection of bent axle, good manufacturability, and piston uses iso-stress design, adds intensity, connecting rod There is wear design with the connecting portion of piston, improve the reliability of anti-wear performance and complete machine.Have the further advantage that
1, reciprocal inertia force and centrifugal intertia force can be with complete equipilibriums, and complete machine externally only has tilting moment, therefore, vibration Little;
2, without side force, without piston knock noise, therefore, noise is little;
3, reciprocating mass is little, little toward complex acceleration, thus reciprocal inertia force is little;Without side force, thus piston grinds with cylinder sleeve Damaging little, therefore, engine test bench characteristic curve can improve, and power per liter is high;
4, all moving surfaces are at the easy lubricant environment of low temperature, and mechanical efficiency can improve.
5, the existence of two bent axles can be greatly improved the ability to bear of in-cylinder pressure, and development potentiality is huge.
6, the advantage of mechanism ensure that the reliability of pottery use, the use of pottery significantly improve ignition temperature, for The recovery of follow-up heat provides condition.
7, compression stroke sprays into normal-temperature water, reduces mixture temperature, and compression ratio (in conjunction with variable compression ratio just can be promoted to 15 It is 15~26).
8, spraying into high pressure saturation water, steam expansion work before igniting, the existence of steam simultaneously can reduce combustible gas Body is to the heat transfer loss of casing wall, thus improves the thermal efficiency.
9, employing this utility model variable piston mechanism, compression ratio can realize from 11~18.6 variable, is ensureing high load capacity On the premise of not knocking, the Smaller load thermal efficiency in raising, thus save oil consumption 20%.
10, exhaust phase, piston is in maximum extension state, residual gas can be greatly lowered, thus improve further Compression ratio, improves the thermal efficiency.
Accompanying drawing explanation
Below according to drawings and Examples, this utility model is further illustrated.
Fig. 1 this utility model structural representation;
Fig. 2 is the left view of Fig. 1;
Fig. 3 is the right view of Fig. 1;
Fig. 4 is the top view of Fig. 1;
Fig. 5 is the upward view of Fig. 1;
Fig. 6 is the A-A sectional view of Fig. 1;
Fig. 7 is the B-B sectional view of Fig. 1;
Fig. 8 is the C-C sectional view of Fig. 1;
Fig. 9 is this utility model external structure axonometric chart;
Figure 10 is this utility model internal structure axonometric chart;
Figure 11 is the axonometric chart of a kind of piston of utility model;
Figure 12 is this utility model bar linkage structure figure;
Figure 13 is this utility model variable-compression-ratio piston structural representation, the D-D sectional view of Figure 14;
Figure 14 is this utility model variable-compression-ratio piston structural representation.
In figure, 1, bent axle, 1-1, crank-pin, 1-2, oil duct, 2, cylinder, 3, piston, 3-1, piston head, 3-2, cervical region, 3- 3, wear-resisting watt of set, 3-4, slot, 3-5, piston guide bar, 3-6, piston end cap, 3-7, floor, 3-8, elastic component groove, 3-9, lead To slide block, 3-10, stopping means, 3-11, compression clearance, 4, connecting rod, 4-1, link body, 4-2, connecting rod FE Tiler are 4-3, wear-resisting Layer, 4-4, lightening hole, 5, cylinder body, 5-1, cylinder body, 5-2, Curved shaft support portion, 5-3, piston rod guide groove, 5-4, FE Tiler, 6, pass Moving gear, 7, output gear, 8, elastic component.
Detailed description of the invention
Below in conjunction with embodiment, this utility model is further illustrated.
Such as accompanying drawing Fig. 1-Figure 10 one twin crankshaft engine, it includes cylinder 2 and can make straight reciprocating motion in cylinder Piston 3,
The both sides of described cylinder 2 are disposed with two bent axles be arrangeding in parallel 1, the crank-pin 1-1 that two bent axles 1 are corresponding Between be hinged with connecting rod 4, constitute double-crank mechanism;
Also include that cylinder body 5, cylinder body 5 include being formed the cylinder body 5-1 of described cylinder 2 and for accommodating and supporting described double The Curved shaft support portion 5-2 of crank mechanism;
The top of described piston 3 is piston head 3-1, and piston head 3-1 lower end is cervical region 3-2, and cervical region 3-2 lower end is cylindricality Piston guide bar 3-5, on piston guide bar 3-5, making has slot 3-4, described connecting rod 4 to be slidably inserted into described slot 3-4 In, make in described cylinder body 5 and have the piston rod guide groove 5-3 adaptive with described piston guide bar 3-5, the lower end of described slot 3-4 Opening also fixing is connected for removable equipped with between piston end cap 3-6, piston end cap 3-6 with piston guide bar 3-5;Described piston Guide post 3-5 preferably cylinder, uniform force, good manufacturability, structure simplify.
Described piston 3 is the piston without skirt that piston guide end separates with piston seal end, and described piston seal end is i.e. Described piston head 3-1, described piston guide end is described piston guide bar 3-5 and piston rod guide groove 5-3;
Described cylinder 2 has multiple, and multiple cylinders 2 are the most single-row or biserial arrangement, described piston 3, connecting rod 4, lives Guide post 3-5 is corresponding with the quantity of cylinder 2 and position with the crank-pin on each bent axle 1 for plug.
The part that described piston 3, cylinder 2 directly contact with high-temperature fuel gas uses ceramic material.
Described connecting rod 4 includes link body 4-1 being positioned at described slot 3-4, and the two ends of link body 4-1 are equipped with even Bar FE Tiler 4-2, connecting rod FE Tiler 4-2 and link body 4-1 are forming removable fixing be connected with the hinged place of crank-pin 1-1;Described The lower edges that contacts with described slot 3-4 of link body 4-1 make and have wearing layer 4-3.
Described wearing layer 4-3 be the wearing layer being plated on the surface of described link body 4-1 or be separately made watt Shape wear-resistant material layer or the circular arc bulk wear-resistant material layer being separately made.
The end of described each bent axle 1 is provided with travelling gear 6, and between two travelling gears 6, engagement is provided with output gear Wheel 7, output gear 7 is arranged on the mandrel of cylinder body 5, and described cylinder body 5 has the case accommodating described travelling gear 6.
Having the axis hole that the main shaft for described bent axle 1 passes in described cylinder body 5, each axis hole lower end is equipped with FE Tiler 5-2.
As shown in Fig. 6, Fig. 7, Figure 11, described cervical region 3-2 is the cross cylindricality being made up of four floor 3-7, four ribs The outside of plate 3-7 is in approximation iso-stress circular arc;Or the outline of described cervical region 3-2 has approximation equally stressed curved surface Revolution shape.One skilled in the art will appreciate that iso-stress design is perfect condition, engineer applied can only be to reach approximately, institute It is clearly with the term of " approximation ".For this utility model, piston can be by certain moment of flexure, and cervical region 3-2 top is subject to Moment of flexure relatively big, therefore the circular arc in the outside of four floor 3-7 is the camber line gradually tapered up from the top down;As the revolution bodily form Shape, should be upper coarse and lower fine revolving body.
Such as Figure 13, shown in 14, described piston 3 is variable-compression-ratio piston, described cervical region 3-2 and described piston guide Connect between bar 3-5 and have guide runner 3-9, guide runner 3-9 and described cervical region 3-2 are slidably connected and are provided with stopping means 3- 10, described guide runner 3-9 and described piston guide bar 3-5 are removable fixing be connected, flexible part groove in described cervical region 3-2 3-8, elastic component groove 3-8, built with elastic component 8, leave compression clearance between described cervical region 3-2 and described piston guide bar 3-5 3-11.Using this utility model variable-compression-ratio piston mechanism, compression ratio can realize from 11~18.6 variable, is ensureing high load capacity On the premise of not knocking, the Smaller load thermal efficiency in raising, thus save oil consumption 20%.
Described elastic component 8 is that several disc springs combine, can bear big load, be easily installed, safety high.
In double-crank mechanism, the frictional force of piston and connecting rod causes the side force of piston, and piston is back and forth slided along guide pad Dynamic, piston side force is born from the impact friction without causing piston and cylinder sleeve by piston guide groove completely.Either piston The friction of friction with connecting rod or piston and piston guide groove, all in the easy lubricant environment of low temperature.In embodiment, rub herein Coefficient is 0.02~0.06, and its effect is: during engine speed 4000r/min, traditional crank slide block mechanism maximum lateral force 3500N, piston speed 16m/s, abrasion between piston and cylinder sleeve, seal, leak gas, the problem such as mechanical noise following.And Piston of the present utility model has a unique design: guide and hermetic separation, and guide end bears whole load and is in low temperature and easily moistens Territory, skating area, sealed end no-load and be in high-temperature area, the problems referred to above can get good solution.4 cylinder 1.8L the most in upright arrangement are Export greatly moment of torsion: 225Nm@4000r/min, peak power output: 118KW@5500r/min, restrict the peak torque moment One of principal element that 4000r/min rises is the abrasion of piston and cylinder, and this moment can actively reduce oil spout with rear engine Amount reduces abrasion.The piston guide mechanism of this utility model twin crankshaft engine is in the easy lubricant environment of low temperature, moves at this Secondary force feed mode is the most ripe, and wear extent is the least, and the rotating speed moment that therefore peak torque is corresponding can extend to About 5500r/min.
It addition, this utility model can reduce electromotor height dimension;Conventional flat contraposition engine, lateral dimension is restriction One critical size of automobile general arrangement, slider-crank mechanism is in order to reduce piston and cylinder sleeve side force, and the tie rod holes heart is away from typically Being 3.2~4 times of crank up radius, this utility model uses double-crank mechanism thus is not limited by this factor.

Claims (10)

1. a twin crankshaft engine, it includes cylinder (2) and can make the piston (3) of straight reciprocating motion in cylinder, and it is special Levy and be:
The both sides of described cylinder (2) are disposed with two bent axles be arrangeding in parallel (1), the crank-pin that two bent axles (1) are corresponding (1-1) it is hinged with connecting rod (4) between, constitutes double-crank mechanism;
Also include that cylinder body (5), cylinder body (5) include being formed the cylinder body (5-1) of described cylinder (2) and be used for accommodating and support institute State the Curved shaft support portion (5-2) of double-crank mechanism;
The top of described piston (3) is piston head (3-1), and piston head (3-1) lower end is cervical region (3-2), cervical region (3-2) lower end Being the piston guide bar (3-5) of cylindricality, the upper making of piston guide bar (3-5) has slot (3-4), described connecting rod (4) to slide slotting Entering in described slot (3-4), making in described cylinder body (5) has the piston rod guide groove adaptive with described piston guide bar (3-5) (5-3), the lower ending opening of described slot (3-4) equipped with piston end cap (3-6), piston end cap (3-6) and piston guide bar (3- 5) it is removable fixing connection between;
Described piston (3) is the piston without skirt that piston guide end separates with piston seal end, described piston seal end i.e. institute The piston head (3-1) stated, described piston guide end is described piston guide bar (3-5) and piston rod guide groove (5-3);
Described cylinder (2) has multiple, and multiple cylinders (2) are the most single-row or biserial arrangement, described piston (3), connecting rod (4), piston guide bar (3-5) is corresponding with the quantity of cylinder (2) and position with the crank-pin on each bent axle (1).
Twin crankshaft engine the most according to claim 1, it is characterised in that: described piston (3), cylinder (2) and high temperature The part that combustion gas directly contacts uses ceramic material.
Twin crankshaft engine the most according to claim 1, it is characterised in that: described connecting rod (4) includes being positioned at described inserting Link body (4-1) in groove (3-4), the two ends of link body (4-1) equipped with connecting rod FE Tiler (4-2), connecting rod FE Tiler (4-2) with Link body (4-1) is forming removable fixing be connected with the hinged place of crank-pin (1-1);Described link body (4-1) and institute The lower edges that the slot (3-4) stated contacts makes wearing layer (4-3).
Twin crankshaft engine the most according to claim 3, it is characterised in that: described wearing layer (4-3) is in described company Wearing layer that the surface of bar main body (4-1) is plated to or the tiles wear-resistant material layer being separately made or the circular arc being separately made Block wear-resistant material layer.
Twin crankshaft engine the most according to claim 1, it is characterised in that: described piston guide bar (3-5) is cylinder Shape.
Twin crankshaft engine the most according to claim 1, it is characterised in that: the end of described each bent axle (1) is installed Having travelling gear (6), between two travelling gears (6), engagement is provided with output gear (7), and output gear (7) is arranged on cylinder body (5) Mandrel on, described cylinder body (5) has accommodate described travelling gear (6) case.
Twin crankshaft engine the most according to claim 1, it is characterised in that: have in described cylinder body (5) for described bent axle (1) axis hole that main shaft passes, each axis hole lower end is equipped with FE Tiler (5-4).
Twin crankshaft engine the most according to claim 1, it is characterised in that: described cervical region (3-2) is by four floors (3-7) the cross cylindricality constituted, the outside of four floors (3-7) is in approximation iso-stress circular arc;Or described cervical region (3-2) Outline be have approximation equally stressed curved surface revolution shape.
Twin crankshaft engine the most according to claim 1, it is characterised in that: described piston (3) is that variable compression ratio is lived Plug, is connected between described cervical region (3-2) with described piston guide bar (3-5) and has guide runner (3-9), guide runner (3-9) It is slidably connected with described cervical region (3-2) and is provided with stopping means (3-10), described guide runner (3-9) and described piston guide Bar (3-5) is removable fixing connection, and flexible part groove (3-8) in described cervical region (3-2), elastic component groove (3-8) is built with bullet Property part (8), leaves compression clearance (3-11) between described cervical region (3-2) and described piston guide bar (3-5).
Twin crankshaft engine the most according to claim 9, it is characterised in that: described elastic component (8) is several dish Spring.
CN201620591653.6U 2016-06-16 2016-06-16 Twin crankshaft engine Withdrawn - After Issue CN205744144U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105927380A (en) * 2016-06-16 2016-09-07 徐州弦波引擎机械科技有限公司 Double-crankshaft engine
WO2017215666A1 (en) * 2016-06-16 2017-12-21 徐州弦波引擎机械科技有限公司 Engine cylinder
CN113494511A (en) * 2021-07-21 2021-10-12 超捷紧固系统(上海)股份有限公司 Cold heading forming wear-resistant sliding block shaft and forming method

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105927380A (en) * 2016-06-16 2016-09-07 徐州弦波引擎机械科技有限公司 Double-crankshaft engine
WO2017215665A1 (en) * 2016-06-16 2017-12-21 徐州弦波引擎机械科技有限公司 Double crankshaft engine
WO2017215666A1 (en) * 2016-06-16 2017-12-21 徐州弦波引擎机械科技有限公司 Engine cylinder
CN105927380B (en) * 2016-06-16 2019-05-10 徐州弦波引擎机械科技有限公司 Twin crankshaft engine
US10495023B2 (en) 2016-06-16 2019-12-03 Xuzhou Xian Bo Engine Machinery Technology Co., Ltd. Engine cylinder block
US10502129B2 (en) 2016-06-16 2019-12-10 Xuzhou Xian Bo Engine Machinery Technology Co., Ltd. Double-crankshaft engine
CN113494511A (en) * 2021-07-21 2021-10-12 超捷紧固系统(上海)股份有限公司 Cold heading forming wear-resistant sliding block shaft and forming method

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C14 Grant of patent or utility model
GR01 Patent grant
AV01 Patent right actively abandoned

Granted publication date: 20161130

Effective date of abandoning: 20190510

AV01 Patent right actively abandoned