CN106194316B - A kind of radial seal of Wankel engine and lubricating arrangement - Google Patents

A kind of radial seal of Wankel engine and lubricating arrangement Download PDF

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Publication number
CN106194316B
CN106194316B CN201610834042.4A CN201610834042A CN106194316B CN 106194316 B CN106194316 B CN 106194316B CN 201610834042 A CN201610834042 A CN 201610834042A CN 106194316 B CN106194316 B CN 106194316B
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sealing strip
oil
engine
roller
sliding slot
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CN106194316A (en
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李春洲
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Shanghai Zhouyue Biological Science & Technology Co Ltd
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Shanghai Zhouyue Biological Science & Technology Co Ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01MLUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00Pressure lubrication
    • F01M1/08Lubricating systems characterised by the provision therein of lubricant jetting means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02FCYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F11/00Arrangements of sealings in combustion engines 

Abstract

The invention discloses a kind of radial seal of Wankel engine and lubricating arrangements, are at least made of side shell, oil sump, oil filter, metering oil pump, machine oil spray orifice, oil injection nozzle, axial engine oil chamber, apex sealing strip, radial spring, angle sealing strip and end sealing slot;Apex sealing strip includes at least hollow sealing block, the sliding slot on top and the roller in sliding slot;When rotor rotates, apex sealing strip is pressed against cylinder type face under the collective effect of centrifugal force, the elastic force of radial spring and gaseous-pressure, realizes the parting seal between cavity;Machine oil is sprayed into axial engine oil chamber by metering oil pump from the machine oil spray orifice on engine side shell simultaneously, radially the duct of sealing strip bottom end enters in the sliding slot on apex sealing strip top machine oil in axial engine oil chamber under the influence of centrifugal force, with rolling of the roller in sliding slot, machine oil is continually flowed out from sliding slot, it spreads over roller and on the cylinder type face of roller-contact, forms the lubricating oil film of continuous uniform.

Description

A kind of radial seal of Wankel engine and lubricating arrangement
Technical field
The invention belongs to technical field of engines, are related to Wankel engine, and in particular to a kind of Wankel engine Radial seal and lubricating arrangement.
Background technology
Rotary engine(Rotary Engine)It is by German's Fei Jiashi wankels(Felix Wankel, 1902- 1988)It is invented, therefore also known as Wankel engine (Wankel Engine).Wankel engine is using three-apexed rotor rotation fortune It moves to complete air-breathing, compression, acting, exhaust stroke, it is far different with the linear motion of traditional conventional engine.Wang The rotor of Ke Er engines for each revolution with regard to expansion working three times, and general four-stroke engine often revolves the ability work done that takes two turns Once, therefore Wankel engine has very high power-to-volume ratio.In addition, the unique axial movement property of Wankel engine makes It, which does not need accurate crankshaft counterbalance, can reach very high rotating speed.Only there are two rotatable parts for entire engine, eliminate one As more than 20 a movable parts such as the inlet and outlet valve of four-stroke engine, valve spring, camshaft, engine structure is significantly Simplify, the possibility to break down also greatly reduces.In addition to this, Wankel engine also has small volume, light-weight, low The advantages that center of gravity, small vibrations.
Although Wankel engine has the outstanding advantages that conventional reciprocating formula piston engine does not have, there is also The defects of oil consumption is high, and exhaust emissions is more, and torque is less than normal under low speed.Another apparent problem existing for Wankel engine is hair The overhaul life of motivation is too short, and general Wankel engine, which operates tens thousand of more kilometers, just needs overhaul primary, few more than ten Ten thousand kilometers, this is mainly due to neighboring chambers spaces in rotary polygonal piston engine cylinder body to rely only on one piece of apex sealing strip point Every the apex sealing strip is always that line contacts along cylinder type face high-speed slide and with cylinder type face with rotor high speed rotation, close Mounting is worn quickly, causes three cavitys cannot be completely separated, is generated gas leak phenomenon, so that efficiency of combustion is drastically reduced, while gas There is cut in the long-term friction with apex sealing strip in cylinder type face so that sealing between apex sealing strip and cylinder type face into One step deteriorates.Japanese Axela Inc. has carried out many decades from after the license for obtaining Wankel engine to the engine Sustained improvement with it is perfect, especially done in the material of apex sealing strip, surface treatment, shape, size etc. a large amount of excellent Chemical industry is made, and so that the performance of Wankel engine and service life is had significant progress, however, between apex sealing strip and cylinder type face Lubrication problem do not solve always, current lubricating system is that lubricating oil is sprayed onto cylinder using special oil-metering pump Type is lubricated on face, and the lubricating oil that this lubricating system sprays into is most of misty in addition to small part forms oil film on type face Lubricating oil with one combust of fuel oil or burning to the greatest extent i.e. with exhaust emissions, and because apex sealing strip is transported in one direction Dynamic, the lubricating oil film on cylinder type face is also easy to be scraped by sealing strip, this is also why Wankel engine especially consumes profit The reason of lubricating oil.In addition, experiments have shown that once sliding surface lacks lubricating oil film, apex sealing strip be easy to occur radial-play and Resonance so that apex sealing strip abrasion aggravation, sealing deteriorate, the in addition burning of excessive lubricating oil, necessarily lead to burning be not thorough, The serious problems such as carbon deposit are easy to make the exhaust emissions of engine exceeded;As it can be seen that apex sealing strip and the contact surface in cylinder type face Lubrication state is not only directly related to the service life of engine, also has prodigious relationship with the efficiency of engine, exhaust emissions etc..
For the defect of above traditional Wankel engine, it is close that the present invention develops a kind of radial direction of Wankel engine The chip apex sealing strip of sliding friction is changed to the roller apex sealing strip of rolling friction by envelope and lubricating arrangement, the device, It is introduced into machine oil to apex sealing strip simultaneously, can persistently form lubricating oil on the contact surface in apex sealing strip Yu cylinder type face Film, to greatly reduce the abrasion of apex sealing strip and its scuffing to cylinder type face, to which Wankel engine be significantly increased Service life, while the device can be greatly decreased the usage amount of lubricating oil, reduce exhaust emissions, improve the thermal effect of engine Rate.
Technical problem to be solved by the invention is to provide a kind of radial seal of Wankel engine and lubricating arrangement, In the device, traditional lamellar seal item is replaced with roller sealing strip, while machine oil being introduced in roller sealing strip, it can be big The big loss for reducing sealing strip itself and the abrasion to engine cavity, can substantially reduce the generation of gas leakage and greatly prolong Wang Ke The service life of your engine.
A kind of radial seal of Wankel engine and lubricating arrangement, at least by side shell, oil sump, oil filter, meter Amount formula lubricating oil pump, machine oil spray orifice, oil injection nozzle, axial engine oil chamber, apex sealing strip, radial spring, angle sealing strip and top are close Sealing groove forms, it is characterised in that:Apex sealing strip include at least hollow sealing block, sealing block top sliding slot and sliding slot in Roller;Axial engine oil chamber is on the rotor immediately below end sealing slot, slot and axial machine of the end sealing slot by bottom Grease chamber connects together, and apex sealing strip bottom end passes through slot to be inserted into axial engine oil chamber;Rotor rotate when, apex sealing strip from It is pressed against cylinder type face under the collective effect of mental and physical efforts, the elastic force of spring and gaseous-pressure, realizes the parting seal between cavity;Simultaneously Machine oil is sprayed into axial engine oil chamber by metering oil pump from the machine oil spray orifice on engine side shell, and the machine oil in axial engine oil chamber exists Radially the duct of sealing strip bottom end enters in the sliding slot on apex sealing strip top under the action of centrifugal force, as roller is in sliding slot In rolling, machine oil continually flows out from sliding slot, spreads over roller and continuous on the cylinder type face of roller-contact, being formed Uniform lubricating oil film.
The machine oil spray orifice is opened on the engine side shell near the convex line of cylinder type face, when rotor rotates, axial machine oil The axial line of room can be directed at machine oil orifice center.
The axial engine oil chamber is nearly cylindrical shape, and the port against machine oil spray orifice side is tubaeform or approximate loudspeaker Shape is equipped with gasket seal and spring at port.
The supporting block of oriented both sides protrusion on the apex sealing strip, supporting block is symmetrical, and cross sectional shape is rectangle Or ladder type.
It is fluted on the apex sealing strip lower end outer surface, sealing ring is housed on groove.
The sliding slot on the apex sealing strip top is by two radial sides and two tangential skirts at, roller and four Side contacts for line.
Further, the tangential side of the sliding slot is provided with hole.
The roller is cylinder, and the diameter of roller is less than the thickness of apex sealing strip.
The end sealing groove sidewall has symmetrical grooves, and the shape of groove is rectangle or trapezoidal.
The radial spring is mounted in the groove of end sealing groove sidewall, and the supporting block of apex sealing strip is placed in radial direction On spring.
The beneficial effects of the present invention are:1, traditional chip apex sealing strip is replaced with roller apex sealing strip, by diameter Sliding friction to sealing strip is changed to rolling friction, substantially reduces the abrasion in apex sealing strip and cylinder type face;2, radial seal Lubricating oil is taken to sliding surface from oil groove when item rolls, and is formed the uniform oil film of thickness, is prevented apex sealing strip from dry grinding, substantially Extend the service life of apex sealing strip, while reducing the play and resonance of apex sealing strip, substantially reduces gas leakage;3, cylinder type Face can replace the porous surface of storage lubricating oil with shiny surface, reduce the difficulty of rigid body type face surface treatment, reduce engine and add Work cost;4, it allows to use thicker apex sealing strip, prevents suddenly to break caused by the excessively thin intensity of apex sealing strip declines Split accident;5, the usage amount of lubricating oil is greatly reduced, reduces carbon deposit, drops low exhaust gas emission;6, improve the thermal effect of engine Rate reduces oil consumption;7, the cylinder pressure of engine can be further increased, compression ratio is improved, meets the compression ignition demand of diesel oil.
Description of the drawings
Fig. 1 is the Wankel engine internal structure schematic diagram with axial engine oil chamber.
Fig. 2 is the Wankel engine partial cutaway view with machine oil spray orifice.
Fig. 3 is the rotor schematic diagram with roller apex sealing strip.
Fig. 4 is the schematic enlarged-scale view of roller apex sealing strip.
Specific implementation mode
The present invention is described in further detail with reference to the accompanying drawings and embodiments.
As shown in Figs 1-4, a kind of radial seal of Wankel engine and lubricating arrangement, at least by side shell 1, oil sump 2, Oil filter 3, metering oil pump 4, oil injection nozzle 5, machine oil spray orifice 6, axial engine oil chamber 7, apex sealing strip 8, radial bullet Spring 9, angle sealing strip 10 and end sealing slot 11 form.
The outlet of oil sump 2 is connected in the import of oil filter 3, and the outlet of oil filter 3 is connected in metering oil pump 4 Import on, the outlet of metering oil pump 4 is connected by pipeline with oil injection nozzle 5, oil injection nozzle 5 on the machine oil spray orifice 6, Machine oil spray orifice 6 is opened on the engine side shell 1 near the convex line of cylinder type face;Under axial engine oil chamber 7 is in end sealing slot 11 just On the rotor of side, when rotor rotates, the axial line of axial engine oil chamber 7 can be directed at the center of machine oil spray orifice 6;Axial engine oil chamber 7 is Nearly cylindrical shape, the port against 6 side of machine oil spray orifice is tubaeform or approximate tubaeform, at port equipped with gasket seal 71 and Spring 72;Axial engine oil chamber 7 passes through the slot of 11 bottom of end sealing slot to connect together with end sealing slot 11;Apex sealing strip 8 include at least hollow sealing block 81, the sliding slot 82 on top and the roller 83 in sliding slot;The bottom end of apex sealing strip 8 passes through top The slot of seal groove 11 is held to be inserted into axial engine oil chamber 7;The supporting block 84 of the both sides processing protrusion of apex sealing strip 8, supporting block 84 is symmetrical, and cross sectional shape is rectangle or ladder type;Groove 85 is processed on the lower end outer surface of apex sealing strip 8, on groove 85 Fill sealing ring 86;The sliding slot 82 on 8 top of apex sealing strip is by two longitudinal edges and two tangential skirts at the tangential side of sliding slot 82 It is provided with hole;Roller 83 is contacted with four sides for line;Roller 83 is cylinder, and the diameter of roller 83 is less than apex sealing strip 8 Thickness;11 side wall of end sealing slot has symmetrical grooves 1101, and the shape of groove 1101 is rectangle or trapezoidal;Radial spring 9 is installed In groove 1101, the supporting block 84 of apex sealing strip 8 is placed on radial spring 9.
When engine works, with the rotation of rotor, apex sealing strip 8 is in centrifugal force, the elastic force and gas pressure of radial spring 9 It is pressed against cylinder type face under the collective effect of power, realizes the parting seal between cavity;Meanwhile the machine oil in oil sump 2, through machine oil The formula lubricating oil pump 4 that is measured after the filtering of filter 3 is sucked and is sent to oil injection nozzle 5 after pressurizeing, according to rotor speed, with different stream Amount from machine oil spray orifice 6 sprays into axial engine oil chamber 7, radially sealing strip 8 under the influence of centrifugal force of the machine oil in axial engine oil chamber 7 The duct of bottom end enters in the sliding slot 82 on top, and with rolling of the roller 83 in sliding slot 82, machine oil is continually from sliding slot 82 Middle outflow, spread over roller 83 and the cylinder type face that is contacted with roller 83 on, form the lubricating oil film of continuous uniform.
Above example is one of preferred embodiment, is to make those skilled in the art more fully understand this Invention, is not to be construed as the restriction to right protection range of the present invention, on the contrary, for the common scientific research personnel of this field, The change or adjustment of all any unsubstantialities carried out using the present invention, should all fall into the protection domain of claims of the present invention Within.

Claims (10)

1. radial seal and the lubricating arrangement of a kind of Wankel engine, at least by side shell, oil sump, oil filter, metering Formula lubricating oil pump, machine oil spray orifice, oil injection nozzle, axial engine oil chamber, apex sealing strip, radial spring, angle sealing strip and end sealing Slot forms, it is characterised in that:Apex sealing strip includes at least hollow sealing block, the sliding slot on top and the roller in sliding slot;Axis It is on the rotor immediately below end sealing slot to engine oil chamber, end sealing slot is connected in by the slot of bottom with axial engine oil chamber Together, apex sealing strip bottom end passes through slot to be inserted into axial engine oil chamber;When rotor rotates, apex sealing strip is in centrifugal force, bullet It is pressed against cylinder type face under the elastic force of spring and the collective effect of gaseous-pressure, realizes the parting seal between cavity;Metering-type simultaneously Machine oil is sprayed into axial engine oil chamber by lubricating oil pump from the machine oil spray orifice on engine side shell, and the machine oil in axial engine oil chamber is in centrifugal force Under the action of the duct of radially sealing strip bottom end enter in the sliding slot on apex sealing strip top, with rolling of the roller in sliding slot Dynamic, machine oil is continually flowed out from sliding slot, is spread over roller and on the cylinder type face of roller-contact, is formed continuous uniform Lubricating oil film.
2. radial seal and the lubricating arrangement of a kind of Wankel engine described in accordance with the claim 1, it is characterised in that:It is described Machine oil spray orifice be opened on the engine side shell near the convex line of cylinder type face, rotor rotate when, the axial line of axial engine oil chamber can It is directed at machine oil orifice center.
3. radial seal and the lubricating arrangement of a kind of Wankel engine described in accordance with the claim 1, it is characterised in that:It is described Axial engine oil chamber be nearly cylindrical shape, against machine oil spray orifice side port be it is tubaeform or approximate tubaeform, at port fill There are gasket seal and spring.
4. radial seal and the lubricating arrangement of a kind of Wankel engine described in accordance with the claim 1, it is characterised in that:It is described Apex sealing strip on both sides it is outwardly convex go out supporting block, supporting block is symmetrical, cross sectional shape be rectangle or ladder type.
5. radial seal and the lubricating arrangement of a kind of Wankel engine described in accordance with the claim 1, it is characterised in that:It is described Apex sealing strip lower end outer surface on be provided with groove, sealing ring is housed on groove.
6. radial seal and the lubricating arrangement of a kind of Wankel engine described in accordance with the claim 1, it is characterised in that:It is described Sliding slot by two radial sides with two tangential skirts at roller is contacted with the contact on four sides for line.
7. a kind of radial seal of Wankel engine and lubricating arrangement according to claim 6, it is characterised in that:It is described The tangential side of sliding slot be provided with hole.
8. radial seal and the lubricating arrangement of a kind of Wankel engine described in accordance with the claim 1, it is characterised in that:It is described Roller be cylinder, the diameter of roller is less than the thickness of apex sealing strip.
9. radial seal and the lubricating arrangement of a kind of Wankel engine described in accordance with the claim 1, it is characterised in that:It is described End sealing groove sidewall have a symmetrical grooves, the shape of groove is rectangle or trapezoidal.
10. radial seal and the lubricating arrangement of a kind of Wankel engine described in accordance with the claim 1, it is characterised in that:Institute The radial spring stated is mounted in the groove of end sealing groove sidewall, and the supporting block of apex sealing strip is placed on radial spring.
CN201610834042.4A 2016-09-20 2016-09-20 A kind of radial seal of Wankel engine and lubricating arrangement Active CN106194316B (en)

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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106762015B (en) * 2017-01-17 2019-01-01 北京理工大学 A kind of rotary engine lubricating system
CN106968787B (en) * 2017-06-01 2022-09-06 湖北科技学院 Rotor engine
CN110284993A (en) * 2019-06-26 2019-09-27 西北工业大学 Rotary engine apex combustion seal and rotary engine
CN113669218A (en) * 2020-05-14 2021-11-19 郑建平 Magnetic energy engine
CN113530669B (en) * 2021-07-21 2022-07-05 北京工业大学 Cantilever type radial sealing device for rotary engine

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5305721A (en) * 1989-06-29 1994-04-26 Burtis Wilson A Rotary Wankel type engine
JPH11257001A (en) * 1998-03-15 1999-09-21 Shigeki Nishimura Apex seal part of rotary reciprocating engine
CN1680697A (en) * 2004-11-10 2005-10-12 刘博阳 Toothed piston rotary engine
CN101560912A (en) * 2008-04-14 2009-10-21 张强 Piston radial sealing system, air feed and exhaust system and lubricating system of olive-shaped piston rotating boosting explosive motor
CN202031654U (en) * 2011-04-18 2011-11-09 费红兵 Novel diamond rotary engine
CN205064087U (en) * 2015-10-11 2016-03-02 上海工程技术大学 Roller piston for rotary engine
CN206054028U (en) * 2016-09-20 2017-03-29 上海洲跃生物科技有限公司 A kind of radial seal of Wankel engine and lubricating arrangement

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5305721A (en) * 1989-06-29 1994-04-26 Burtis Wilson A Rotary Wankel type engine
JPH11257001A (en) * 1998-03-15 1999-09-21 Shigeki Nishimura Apex seal part of rotary reciprocating engine
CN1680697A (en) * 2004-11-10 2005-10-12 刘博阳 Toothed piston rotary engine
CN101560912A (en) * 2008-04-14 2009-10-21 张强 Piston radial sealing system, air feed and exhaust system and lubricating system of olive-shaped piston rotating boosting explosive motor
CN202031654U (en) * 2011-04-18 2011-11-09 费红兵 Novel diamond rotary engine
CN205064087U (en) * 2015-10-11 2016-03-02 上海工程技术大学 Roller piston for rotary engine
CN206054028U (en) * 2016-09-20 2017-03-29 上海洲跃生物科技有限公司 A kind of radial seal of Wankel engine and lubricating arrangement

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