RU2377426C2 - Rotary engine - Google Patents

Rotary engine Download PDF

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Publication number
RU2377426C2
RU2377426C2 RU2008100960/06A RU2008100960A RU2377426C2 RU 2377426 C2 RU2377426 C2 RU 2377426C2 RU 2008100960/06 A RU2008100960/06 A RU 2008100960/06A RU 2008100960 A RU2008100960 A RU 2008100960A RU 2377426 C2 RU2377426 C2 RU 2377426C2
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RU
Russia
Prior art keywords
pump
housing
engine
rotor
symmetry
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RU2008100960/06A
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Russian (ru)
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RU2008100960A (en
Inventor
Ольгерд Яковлевич Скрипко (RU)
Ольгерд Яковлевич Скрипко
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Ольгерд Яковлевич Скрипко
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Priority to RU2008100960/06A priority Critical patent/RU2377426C2/en
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/10Internal combustion engine [ICE] based vehicles
    • Y02T10/12Improving ICE efficiencies

Abstract

FIELD: engines and pumps. ^ SUBSTANCE: invention relates to internal combustion engines. Proposed rotary engine comprises housing with outlet opening and working chamber, two-apex rotor with larger and smaller axes of symmetry fitted on eccentric shaft, and pump with intake hole. Said pump is arranged coaxially with rotary engine on eccentric shaft and comprises two-apex rotor. Housing chamber and pump working surface outlines comply with circumference conchoids. Engine and pump shafts are interjointed in synchronism. Combustion chamber is arranged between engine and pump housings and accommodates branch pipe on engine housing and branch pipe fitted on pump housing. The former houses piston-type valve, while the latter accommodates spring-loaded plate valve. Valve stems of both valves are interjointed in synchronism. Two-apex rotors of engine end pump have slots made along rotor larger axis of symmetry. Width of slots equals diametre of pins fitted at the conchoids pole. Pump intake hole is made in pump housing working surface, to the right of housing axis of symmetry. Intake hole top edge is aligned with pump rotor apex, with rotor in TDC. Discharge hole is made in engine working surface, to the left of housing axis of symmetry. Anti-vacuum valve is arranged on engine working surface, to the right of engine axis of symmetry. ^ EFFECT: higher efficiency. ^ 4 dwg

Description

The invention relates to internal combustion engines and can be used in various fields of industry, in particular in the automotive industry, aircraft, shipbuilding and others.
Known rotary engine containing a housing with a working cavity, a two-vertex rotor with a large and small axis of symmetry mounted on an eccentric shaft in the cavity of the housing, sealing elements located at the tops of the rotor and made in the form of plates, a gear synchronizing gear, a stationary gear of which is mounted on a bearing the eccentric shaft is coaxial with it and mated with the gear of the internal gearing of the rotor. The diameter of the fixed gear is equal to half the diameter of the internal gear. The eccentricity of the shaft eccentric is half the diameter of the stationary gear. The contour of the working surface of the body cavity is made on the conchoid of a circle. The inlet and outlet windows on the side wall of the housing are offset from its plane of symmetry in the direction of rotation of the eccentric shaft, with the inlet windows offset 90 ° and the exhaust windows 35-40 ° (SU No. 2015372, Cl. R02B 53 / 00.1989).
Known rotary engine containing a housing with a working cavity, a two-vertex rotor with a large and a small axis of symmetry mounted on an eccentric shaft, sealing elements located at the tops of the rotor and made in the form of plates, a gear synchronizing gear, a stationary gear of which is mounted on the eccentric shaft bearing coaxially with it and is associated with the gear of the internal gearing of the rotor, while the diameter of the fixed gear is equal to half the diameter of the gear of the internal gearing, eccentricity That eccentric shaft is half the diameter of the fixed gear, the contour of the working surface of the housing cavity is made on the conchoid of the circle, the intake windows are offset by 60-90 °, and the exhaust by 15-45 ° from the plane of symmetry in the direction of rotation, in a smaller chamber on the working surface of the housing a nozzle is installed, located on the axis of symmetry of the housing or with a shift of ± 10 °, and a glow plug that is offset from the nozzle by 20-45 ° in the direction of rotation of the shaft, the sealing elements, in the form of spring-loaded plates, are installed Lena at the tops of the rotor with a slope of 7-15 ° in the direction of rotation, and the end parts of the plates in the body of the rotor are connected by channels to the working cavities, moreover, the plate sliding along the incident curve is connected by a channel to the larger chamber, and the plate sliding along the running curve with a smaller chamber, the notch in the faces of the rotor has a greater volumetric displacement towards the rotor, while the notch edge is offset by 10-15 ° relative to the glow plug towards the rotation when the rotor is in top dead center (RU No. 2070969, F01C 1/00 , 1996, 5 pp.).
The closest to the claimed technical essence and the achieved result, selected as a prototype, is a rotary engine (RPD) containing a housing with a trochoidal working surface, a two-vertex rotor with a large and small axis of symmetry mounted on an eccentric shaft, a gear synchronizing gear with a gear ratio 1: 2. The eccentricity of the shaft eccentric is half the diameter of the fixed gear of the housing, and the diameter of the gear of the internal gearing of the rotor is two diameters of the fixed gear. The channels through which gas exchange is carried out are located in the housing and are controlled synchronously with the duty cycle of the rotating rotor or through valves. Four variants of the position of the channels (windows) are considered (DD 96756, class Р02В 53/02, 1973).
The first option is valve. The windows are made in the wall of the housing and are located symmetrically relative to the axis of symmetry of the housing in a larger chamber. This option is the most effective of those considered from the point of view of the maximum duration of the stroke phase, however, it has a very short intake phase, which requires turbocharging for high-quality purging and filling of the working cavity. The disadvantages include the loss of power to drive the valve system, as well as unproductive losses of the working mixture in the valve channels.
The second option is also valve. The windows are located on the end surface of the housing, the inlet window is in a smaller chamber and controlled by a valve, the exhaust window in a larger chamber. The windows are somewhat offset along the rotor from the axis of symmetry of the housing. When the valve is opened, a larger chamber is purged and filled, as well as a smaller chamber is recharged (compression phase). The working stroke in this embodiment is significantly less than in the first embodiment, as is the intake phase. A very short inlet phase requires high inlet pressures to compensate for the back pressure in the chambers and to provide high-quality charging. The disadvantages of this option are similar to the previous one, and, in addition, the shortened phases of the stroke and intake significantly reduce efficiency.
The third option is valve. The windows are located on the wall of the housing in the larger chamber next to each other and are slightly shifted towards the rotation of the rotor. In the chamber of smaller volume, a purge slot is made on the end part of the housing, which is somewhat shifted from the axis of symmetry in the direction of rotation of the rotor. When opening the outlet window, the spent working fluid is displaced from the cavity due to gas pressure, as well as due to the flow of the working mixture through the purge slot from the compression chamber until the inlet window opens. When the inlet window is opened, the slot closes and the chamber is purged and the mixture is filled by the inlet. After a slight rotation of the rotor, the outlet window closes and a clean inlet occurs, the phase of which is also insignificant. Then the inlet window closes with the valve and a compression process takes place. The phase of the stroke is approximately the same as in the second embodiment; the inlet / outlet phases are short and have a rather long compression cycle. The shift of the windows in this embodiment is forced, since it is advisable to position the purge slot slightly shifting from the axis of symmetry to achieve sufficient pressure in the compression chamber and ensure good purge at the initial moment of release. The shift should be negligible, since with its increase the losses of the working mixture increase significantly. The disadvantages are the same as the above options.
The fourth option is valveless. Windows are located on the end of the housing in a larger chamber next to each other and symmetrically about the axis of symmetry of the housing. The phase of the working stroke is the smallest of the considered options, and the phase of the inlet of the exhaust is practically overlapped, which leads to large losses of the working fluid. The short phase of the stroke and significant losses of the working mixture lead to the low efficiency of this engine variant, although there are some advantages due to the lack of a valve mechanism (DD 96756, Cl. P02B 53/02, 1973).
The problem solved by the invention is the improvement of a rotary engine.
The technical result from the use of the invention is to increase the efficiency of the engine by reducing the loss of power to drive the valve system, reducing the loss of the working mixture in the valve channels, increasing the phase of the stroke and intake, in eliminating the overlap of the phases of the intake and exhaust, leading to the loss of the working fluid.
The technical result is achieved by the fact that in a rotary engine containing a housing with an exhaust window and with a working cavity, a two-vertex rotor with a large and a small axis of symmetry mounted on an eccentric shaft, a pump with an inlet window mounted coaxially with the rotor engine on an eccentric shaft, containing a two-vertex the rotor, the contours of the working surface of the cavity of the housing and the pump, made on the conchoid of a circle, the eccentric shafts of the motor and pump are synchronously interconnected, between the motor housing and the pump housing a combustion chamber is installed with a nozzle located on it and mounted on the motor housing and a nozzle mounted on the pump housing, while an annular cut is made in the middle part of the nozzle mounted on the motor housing and a piston valve is installed in the nozzle, in the nozzle, mounted on the pump casing, a spring-loaded poppet valve is installed, while in the middle part of the indicated pipe a hole is made, the piston-type valve stem and the poppet valve stem are synchronously connected between themselves oh, in the two-vertex rotors of the engine and pump on the end surface, grooves are made along the major axis of symmetry of the rotor, and the width of the grooves is equal to the diameter of the fingers installed in the conchoid pole, the pump inlet window is made in the working surface to the right of the symmetry axis of the pump housing, and the upper edge of the inlet window coincides with the top of the pump rotor located at top dead center, the exhaust window is made in the working surface of the engine to the left of the axis of symmetry of the engine housing, and on the working surface of the engine to the right of The anti-vacuum valve is installed on the axis of symmetry of the engine.
Figure 1 shows a schematic diagram of a rotary engine; figure 2 is a cross section of one of the engine blocks; figure 3 is a schematic diagram of the layout of the engine with a coaxial arrangement of the engine and pump housings, with a common eccentric shaft; figure 4 is a section a - a in figure 3.
The rotary engine comprises a base 1 on which a pump housing 2 and a motor housing 3 are mounted. The inner working surfaces of the housing 2 and the housing 3 are made on the conchoid of a circle with a pole "O" on their axes of symmetry.
Identical two-vertex rotors 4 with large and small axes of symmetry are installed in the housing 2 and the housing 3.
The rotors 4 are mounted for rotation on the necks of identical eccentric shafts 5 installed in the housings 2 and 3 on bearings 6 and 7, Fig.2.
The surface of the rotors 4 are made on the conchoid of a circle. On the end surface in each rotor 4 along the major axis of symmetry a groove is made. The width of the groove is equal to the diameter of the finger 8, installed at the pole point of the circle conchoid on the end walls of the housing 2 and housing 3.
Counterbalances 9 are installed on the eccentric shafts 5 in the housings 2 and 3 between the bearings 6 and 7. Holes 10 are made at the ends of the eccentric shafts 5 on the side of the working chambers, which are connected to the holes 11 made in the counterweights 9 in radial directions opposite the row of holes 12 made in housings 2 and 3. At the ends of the eccentric shafts 5 the same chain drive sprockets 13 are installed.
In the end walls of the housings 2 and 3, the holes 14 are made along the axis of the eccentric shafts 5 (FIG. 2).
A combustion chamber 15 is installed between the housings 2 and 3, the cavity of which is connected with the working cavities of the housings 2 and 3 through the pipe 16 and the pipe 17. The pipe 16 is installed inside the cavity of the combustion chamber 15 on the pump housing 2 in the body of the pipe 16. An opening is made in its middle part 18. Opposite the entrance to the pipe 16, a poppet valve 19 is installed with the ability to move in the pipe 16 until it stops in the seat 20 and vice versa. A pipe 17 is installed inside the combustion chamber 15, one end on the housing 3, the other on the housing of the combustion chamber 15. An annular cutout 21 is made in the middle part of the pipe 17, and a piston type valve 22 is movably mounted inside the pipe 17. The valve stems 19 and 22 are synchronously connected by a synchronizing device 23. The valve stem 19 is spring-loaded with a spring 24 pressing the valve disc 19 against the seat 20. The valve stem 22 is installed in the synchronizing device 23 so that when the valve 19 is pressed against the seat 20, the valve 22 opens the slot annular cutout 21. In the housing 3 to the left of the axis of symmetry is made window 25 release. The upper edge of the window 25 coincides with the top of the rotor 4 located at top dead center. In the housing 2 to the right of the axis of symmetry, an inlet window 26 is made. The upper edge of the window 26 coincides with the top of a similar rotor 4 located at top dead center. A valve 27 is installed on the housing 3 to the right of the axis of symmetry. An spark plug 28 is installed in the wall of the combustion chamber 15.
Rotary engine operates as follows.
At the time of starting, the rotor 4 in the housing 3 and a similar rotor in the housing 2 are, for example, at top dead center.
When the eccentric shaft 5 rotates in the direction of the arrow between the surface of the rotor 4 and the inner surface of the housing 3, a gap with a reduced atmospheric pressure is formed, and a spring-loaded valve 27 opens, through which the atmospheric air will enter the increasing gap. Valve 27 is needed to facilitate starting the engine; later, during engine operation, valve 27 will be closed.
Simultaneously with the start of rotation of the rotor 4 in the housing 3, a similar rotor in the housing 2 with its top will open the window 26 and the suction of the working mixture will begin, and when the top of the rotor reaches the lower edge of the window 26, air compression and continued suction of the working mixture will begin, and in the case 3 will be pushed out air through the window 25 and air suction through the valve 27, as mentioned above, without reaching the top 10 ° to the valve 27.
When the air pressure in the housing 2 overcomes the force of the spring 24, the valve will move in the pipe 16 sequentially opening an opening 18 through which part of the compressed air enters the cavity of the combustion chamber 15, forcing air out of it through a slot not completely closed by the valve 22 of the cut-out 21 into the cavity between the surface of the rotor 4 and the inner surface of the housing 3.
Upon the return of the rotors to the top dead center, compressed air from the housing 2 will pass into the cavity of the combustion chamber 15.
Compressed air in the combustion chamber 15 will exert pressure on the side surface of the valve 22, overlapping the annular cutout 21, while the axial force of the valve 22 will be 0 and the valve can move freely along the pipe 17.
The pressure of compressed air on the upper and lower surfaces of the valve disc 19 will also not prevent the valve 19 from moving in the axial direction, which will entail the movement of the valve 19 under the action of the spring 24 until the valve disc 19 is pressed against the seat 20, and the valve 22 synchronously connected with it, moving along the axis of the pipe 17, will open the slit of the annular cutout 21.
Compressed air from the cavity of the combustion chamber 15 will pass into the resulting gap between the surface of the rotor 4 and the inner surface of the housing 3 and exert pressure on the surface of the rotor 4.
In this case, under the pressure of compressed air on the rotor, the force will be applied to the neck of the eccentric shaft 5, and the rotor 4 will be in dynamic equilibrium and the role of the finger 8 (Fig. 2) without being affected by the force will participate in the rotation of the rotor 4.
This will end the first turn of the launch.
At the second turn of the start, the entire cycle of the first turn will be repeated, except that the compressed mixture will be in the combustion chamber 15 and the ignition plug 28, ignited by the spark plug, will rotate the rotor 4.
With further rotation of the rotors 4, the pressure of the working mixture in the combustion chamber 15 and in the engine casing 3 will gradually decrease, and when the pressure of the compressed working mixture on the valve 19 exceeds the pressure in the casing 3 and the force of the spring 24, the valve 19 will begin to move upward, and when opening 18, part the compressed mixture through the hole 18 will displace residual gases from the combustion chamber 15, when the valve 19 comes out of the pipe 16, the valve 22 will block the annular gap of the cutout 21.
When the rotors 4 again occupy the dead center position, under the action of the spring 24, the valve 22 will open and the valve 19 will be pressed against the seat 20, a new stroke will begin and exhaust gas will exit through window 25 and a new inlet of the working mixture through window 26 will begin.
From this moment, the engine starts to work. The filling and stroke are 160 °, i.e. are equivalent.
During engine operation, the rotor 4 of the engine and a similar pump rotor through the openings 14 (FIG. 2), 10, 11, 12 will be continuously cooled by air.
The cooling of the rotors 4 will allow the engine to work at higher speeds.
It is known that at higher speeds the role of seals is reduced, as, for example, in turbojet engines (turbojet engines), where labyrinth seals are sufficient.
In the proposed engine, the gaps between the walls of the housing, and the end walls, and the tops of the rotor can not be inferior in efficiency to the labyrinth seals in the turbojet engine.
It is also known that it is impossible to obtain the necessary compression ratio with one step in the turbojet engine, therefore, the necessary compression ratio is achieved by introducing a multistage.
In a rotary engine, the necessary compression ratio is obtained in one unit, so the dimensions of the rotary engine (RPD) can compete with the dimensions of the turbojet engine.
Based on the foregoing, it is possible to use RPD in helicopters, and if the engine and pump are installed coaxially (Fig. 3), then it can be used in aircraft. The components and materials used in the RPD are similar to the components and materials in the turbojet engine.

Claims (1)

  1. A rotary engine comprising a housing with an exhaust window and with a working cavity, a two-vertex rotor with a large and a small axis of symmetry mounted on an eccentric shaft, a pump with an intake window mounted coaxially with a rotary engine on an eccentric shaft, containing a two-vertex rotor, the contours of the working surface of the housing cavity and a pump made on a conchoid of a circle, characterized in that the eccentric shafts of the engine and pump are synchronously connected to each other, a combustion chamber is installed between the motor housing and the pump housing with a nozzle installed on the motor housing and a nozzle mounted on the pump housing, an annular cutout is made in the middle of the nozzle mounted on the motor housing, and a piston type valve is installed in the nozzle, in the nozzle mounted on a spring-loaded poppet valve is installed in the pump casing, while a hole is made in the middle part of the indicated pipe, the piston-type valve stem and the poppet valve stem are synchronously interconnected, in two-vertex mouths On the end surface of the motor and pump, grooves are made along the major axis of symmetry of the rotor, the grooves being equal to the diameter of the fingers installed in the conchoid pole, the pump inlet window is made on the working surface to the right of the axis of symmetry of the pump housing, and the upper edge of the inlet window coincides with the top of the rotor pump located at top dead center, the exhaust window is made in the working surface of the engine to the left of the axis of symmetry of the engine housing, and on the working surface of the engine to the right of the axis of symmetry of the engine An anti-vacuum valve is installed.
RU2008100960/06A 2008-01-09 2008-01-09 Rotary engine RU2377426C2 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2444635C2 (en) * 2010-05-07 2012-03-10 Ольгерд Яковлевич Скрипко Rotary engine
RU2693550C1 (en) * 2018-02-09 2019-07-03 Александр Владимирович Яновский Internal combustion rotor engine with asymmetric compression and expansion

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2444635C2 (en) * 2010-05-07 2012-03-10 Ольгерд Яковлевич Скрипко Rotary engine
RU2693550C1 (en) * 2018-02-09 2019-07-03 Александр Владимирович Яновский Internal combustion rotor engine with asymmetric compression and expansion

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Effective date: 20130110