CN1936344A - Rotary piston-wheel type gas motor - Google Patents

Abstract

This invention relates to a gas motor(steam or fuel) used in multiple media, in which, two piston wheel rotors rotate uniformly driven by a linkage, which utilizes the wallop of gas and the pressure difference between the inlet cavity and an exhaust cavity to push the rotor of the piston wheel rotor, the sealing of the piston wheel gas motor is realized by dynamic seal of gas.

Description

Rotary piston-wheel type gas motor

Affiliated technical field

The present invention relates to a kind of gas motor (or steam or combustion gas motor), especially simple in structure, slewing range is big, and the long lifetime, high-power, big volume can expand reaching the rotary displacement type aeromotor that moves in the multiple gases medium under multiple operational temperature conditions.When medium is combustion gas, can be referred to as the combustion gas motor, when medium is steam, can be referred to as steam motor, when medium is pressurized air, can be referred to as air motor.

Background technique

The gas motor is the executive component that compressed-air actuated energy is changed into continuous rotation motion, can be divided into blade type, piston type and gear type three classes by structural type.

Sliding-vane motor mainly is made up of component such as stator, rotor, blade, thrust plate, axle and housings.Sliding-vane motor be one group can be in chute radially flexible rectangular paddle, blade is separated into the closed cells identical with blade quantity to front and rear cover with annulus between commentaries on classics, stator along circumference.Because the radial distance between commentaries on classics, stator is along circumferential variation, the volume of these cells is understood the expansion of generating period and is dwindled in the process of rotor rotation.Spring is equipped with in the blade bottom, and blade is close to the stator curve surface when guaranteeing the motor starting.The shortcoming of sliding-vane motor is that contamination resistance is relatively poor, the turbidity test of working medium is required high, and owing to contact between blade and stator in the work, needs lubricant oil and is lubricated, and is easy to wear.

The piston type pneumatic motor is to change the straight line motion of several pistons into rotation motion by crank or swash plate, and its structure has two kinds of radial-piston motor and axial-pistons.The working room of radial-piston motor gas motor is made of piston and cylinder body, and several cylinders radially distribute around bent axle, and each cylinder links to each other with bent axle by connecting rod.To each cylinder sequence air feed, pressurized air promotes piston motion by the pressurized air distributing valve, drives bent axle and rotates.When distributing valve forwarded certain angle to, the residual air in the cylinder was discharged through relief opening.Change the inlet and outlet direction, can realize the forward and backward commutation of gas motor.The structure of axial-piston gas motor is at axial uniform cylinder, does reciprocating linear motion successively at the compressed-air actuated effect lower cylinder piston of input, by the swash plate effect, straight line motion is changed into the rotation motion of output shaft.The shortcoming of piston type pneumatic motor is a complex structure, and part is many, and the price height because piston moves, also needs lubricating oil system in cylinder.

Gear type gas motor is to be made of a pair of gear and protecgulum, bonnet and housing, and two gears are meshing with each other, and contacts with protecgulum, bonnet and housing.Two pitch wheels are divided into the gas motor and enter chamber and discharge side, and pressurized gas flow into and enter in the chamber, promote two gears rotations, and at discharge side gas are discharged.The involute profile of many employings of gear standard, involute equation is

$\left\{\begin{array}{c}{\mathrm{\ρ}}^2=R^2(1+{\mathrm{\α}}^2)\\ \mathrm{\θ}=\mathrm{\α}-\mathrm{arctg\α}\end{array}\right.$

Gear type gas motor has bidentate wheeled and multiple tooth wheeled, and gear can adopt straight-tooth, helical teeth and herringbone tooth.Adopt the gas motor of spur gear positive and negatively to rotate, adopt herringbone gear or helical gear gas motor then can not reverse.That gear gas motor also has is simple in structure, in light weight, volume is little, the characteristics of easy clockwise and anticlockwise, but will have lubricant oil to be lubricated, and easy to wear, the life-span is low.

Above gas motor is all finished sealing function by parts contact friction, and under the condition for the low-voltage high speed rotation, the gas motor very easily causes wearing and tearing, life-span is low, particularly for the combustion gas and the steam medium of high temperature, because lubricant oil was lost efficacy, the gas motor can not use.

The work of turbine is to absorb energy from the gas flow that combustion system discharges, and it is expand into lower pressure and temperature, turbine is made up of some grades static stator blade and some grades rotary work blade, its basic element of character combuster gas conduct pipe, stator blade, the turbine disk and moving turbine blade.Runner assembly is by the bearing supporting that is contained in turbine casing, turbine shaft can with the shared axle of compressorshaft, perhaps join by self centering coupling and compressorshaft.Stator blade has aerofoil section, and the passage between the adjacent blades has constituted the convergent duct.Moving turbine blade also is designed to aerofoil section, and the passage between each adjacent blades accelerates to throat with making steady air current, the area minimum of throat, and speed has reached required outlet velocity, produces the reaction degree of requirement.Turbine is under the small-power state, and radius is very little, leak to increase, and efficient is very low, and in addition when the working state off-design point of turbine, or under lower-speed state, turbine efficiency is very low.

Steam turbine be a kind of be working medium with steam, and the heat energy of steam is converted into the rotating machinery of mechanical work.The elementary cell of steam turbine acting is a stage, and stage is made up of nozzle blade cascade and moving blades, and steam turbine can be combined by single-stage or plural serial stage.The heat energy of steam is transformed into the mechanical energy of turbine rotor rotation need be successively through twice transformation of energy in each stage.At first, when the steam of uniform temperature and pressure passes through nozzle blade cascade, thermal power transfer is become the swiftly flowing kinetic energy of steam: then, when high speed steam flow process moving blades, convert kinetic energy the mechanical energy of rotor rotation to, thereby finish the task of utilizing the acting of steam thermal energy driving device.Steam turbine uses when small-power, because blade radius is very little, efficient is very low.

Summary of the invention

Existing gas motor is easy to wear, the life-span is low in order to overcome, high temperature can not use and turbine and steam turbine inefficient deficiency under the small-power state, the invention provides a kind of gas motor, this gas motor utilization rotation volume acting principle adopts non-contact gas dynamic seal mechanism.Acting and packaged unit are responsible for finishing by two rotors of rotary piston-wheel type gas motor, and transmission part is responsible for finishing by clutch, clutch can be gear train, universal joint, gear and tooth cover, shaft joint, thereby make this gas motor moving at a high speed and under the high temperature condition, owing to adopt the motive sealing of non-contact gas, prolong the life-span of gas motor, the temperature conditions that expansion gas motor uses, this gas motor can be worked in all gases medium under combustion gas, steam, the contour low temperature conditions of pressurized air.

The technical solution adopted for the present invention to solve the technical problems is: rotary-piston wheel gas motor is made up of housing, end cap, A and two piston wheels of B rotor, suction tude, outlet pipe, nozzle, bearing and clutch, clutch makes A and two piston wheels of B rotor with certain synchronization uniform rotation, and clutch can be that synchromesh gear, universal joint, shaft joint or other gear train constitute.Two piston wheel rotors are the cylindrical bodys (or cone) that have two or two above fan tooths on the axle, its structure is identical, it is by external diameter R arc surface, internal diameter r arc surface and envelope surface are formed, external diameter R arc surface, the coaxial heart of internal diameter r arc surface, two intersection point lines of external diameter circular arc that each envelope on the fan tooth shaft section is corresponding with it and internal diameter circular arc are crossed the shaft axis of rotor, two pistons wheel rotor by Bearing Installation on housing, the external diameter arc surface and the housing of piston wheel rotor be close (having micro-gap), the external diameter arc surface of piston wheel rotor is close (having micro-gap) with the internal diameter arc surface of another one piston wheel rotor, and piston is taken turns epitrochanterian envelope surface and A and two pistons of B taken turns between the fan tooth of rotor uniform rotation do not interfere.Two swept volume chambeies---gas enters chamber and gas discharge side for two pistons wheel rotor and housing and end cover surface formation.When piston wheel rotor rotation, all the time all there is a rotor to enter the chamber and discharge side separates, and in another rotor rotation process, make the swept volume that enters the chamber become big, the swept volume of discharge side diminishes, gas medium is exactly to expand at the nozzle place, produces high velocity air, utilizes airflow kinetic energy and the pressure reduction that enters chamber and discharge side to promote piston wheel rotor rotation and does work.The sealing mechanism of rotary-piston wheel is the motive sealing of non-contacting gas, it need seal three parts, the one, the gap between piston wheel rotor diameter arc surface and the housing, the 2nd, the gap between piston wheel two sides of rotor and the end cap, three is two piston wheel gap between rotor.First sealing is to have a series of sulculus vertically in inner walls, utilize gas to have viscosity, to be static attached to high velocity air stagnation on the piston wheel rotor of high speed rotating, produce compression ring, it acts on similar piston ring, stops to leak, and also can take turns on the rotor at piston and have " V " shape groove vertically, utilize identical sealing mechanism, also can produce seal action.Because the relative piston wheel with the gap between the housing of piston wheel rotor diameter face rotor radius is very small, piston wheel rotor is high speed rotating again, designs the groove of proper number, promptly can reach the seal action of gas, and don't to producing excessive resistance; Clearance seal between second piston wheel rotor side surface and the end cap, can on taking turns the side of rotor, piston open a series of grooves that seal, also can on end cap, open series of grooves, utilize the motive sealing that is used for reaching the gap of the viscosity of gas and sulculus compression ring; The sealing of the 3rd two pistons wheel gap between rotor, gas medium expands at the nozzle place, produce very high air-flow, according to the Bai Nuli equation, by the design airflow direction, the zone that makes two rotors combine becomes a low pressure area, the gap utilizes this low pressure area to seal between two piston wheel rotors, because two piston wheel rotor clearances are very little, piston wheel rotor is again a high speed rotating, piston wheel rotor drives the gas motion in the boundary layer, and the moving direction of this air-flow can suppress to leak.Piston is taken turns epitrochanterian envelope surface can make A and the uniform rotation of two piston wheels of B rotor, does not interfere between the fan tooth.The intersection coplane of the envelope surface of piston wheel rotor and the intersection of external diameter R arc surface and envelope surface and external diameter r arc surface also passes through shaft axis, two intersection points of external diameter circular arc line that the envelope on the fan tooth shaft section is corresponding with it and internal diameter circular arc line are crossed the center of circle of circular arc, and the envelope equation is

$\left\{\begin{array}{c}X=\cos (\mathrm{\&theta;}-\mathrm{\&alpha;})\&times;{[{(R+r-R\cos \mathrm{\&theta;})}^2+{\mathrm{<figure-callout\; id="2"\; label="R"\; filenames="A20061009191900101.png,A20061009191900131.png"\; state="\{\{state\}\}">R</figure-callout>}}^2{\mathrm{<figure-callout\; id="2"\; label="sin"\; filenames="A20061009191900101.png,A20061009191900131.png"\; state="\{\{state\}\}">sin</figure-callout>}}^2\mathrm{\&theta;}]}^{}\\ Y=\sin (\mathrm{\&theta;}-\mathrm{\&alpha;})\&times;{[{(R+r-R\cos \mathrm{\&theta;})}^2+{\mathrm{<figure-callout\; id="2"\; label="R"\; filenames="A20061009191900101.png,A20061009191900131.png"\; state="\{\{state\}\}">R</figure-callout>}}^2{\sin }^2]}^{}\\ \mathrm{\&alpha;}=\mathrm{arctg}[R\sin \mathrm{\&theta;}/(R+r-R\cos \mathrm{\&theta;})]\\ 0\&le;\mathrm{\&theta;}\&le;\arccos [(R+r)/\left(2R\right)]\end{array}\right.$

X, Y work mark initial point is the concentrically ringed initial point in piston wheel rotor shaft cross section in this equation, X-axis is by the intersection point of the envelope r corresponding with it, R circular arc, by the given different θ value envelope that can draw, this envelope is referred to as theoretical envelope, and in fact as long as theoretical envelope envelope is not interfered when any one interior envelope can make two piston wheel rotors rotate synchronously.Since any curve around its initial point turn over several angle inswept irregular area equal two sectorial areas poor that this curve radius corresponding turns over same angle, if the compressibility of gas can be ignored, the swept volume Q=π (R of rotary piston-wheel type gas motor ²-r ²) ω B, wherein ω is the angular velocity of rotary piston-wheel type gas motor, B is the width of the piston wheel rotor of rotary piston-wheel type gas motor.The relief opening of rotary-piston wheel gas motor can be opened on the diametric plane of housing, also can open on end face, particularly relief opening is opened on the side end near the axle center, guaranteeing not make under the situation that enters chamber and discharge side connection, utilize the kinetic energy of gas high speed rotating to continue to promote piston wheel rotor expansion acting, exhaust port on the end cap is discharged from the side again, the in-depth energy utilization ratio.

Two piston wheel rotors can be columned, also can be cone shape.The axle center of two piston wheel rotors can be an angle of 90 degrees or acute angle and obtuse angle, when the axle center of two piston wheel rotors can be an angle of 90 degrees or acute angle and obtuse angle, the cross section curve of its envelope surface can be that aforesaid envelope curver also can be involute or other envelope, and clutch can be conical tooth wheels or ball tooth, tooth cover group and universal joint etc.For low power gas motor, its compact structure.Rotary-piston wheel gas motor also can be used in the flowing medium of low pressure and mass flow, as be used in water, other flowing mediums of wet goods, and the leakage of micro-gap is little to its influence under the situation of cancellation nozzle.

The invention has the beneficial effects as follows, because rotary piston-wheel type gas motor acting and closing function are finished by two piston wheel rotors, its transmission agency is finished by clutch, utilize rotation volume acting principle, adopt the dynamic seal mechanism of non-contact friction, the efficient height does not have wearing and tearing, long service life can be expanded high speed operation under high temperature condition.

Description of drawings

The present invention is further described below in conjunction with drawings and Examples.

Fig. 1 is the structure principle chart of first embodiment of the invention.

Fig. 2 is the structural principle A-A sectional drawing of first embodiment of the invention.

Fig. 3 is a kind of shape assumption diagram of first embodiment.

Fig. 4 is the structure principle chart of second embodiment (rotor axis intersects the obtuse angle).

Fig. 5 is the profile of second embodiment's piston wheel awl rotor.

Fig. 6 is the sectional view of second embodiment's piston wheel awl rotor B-B.

Fig. 7 is the sectional view of second embodiment's piston wheel awl rotor C-C.

Fig. 8 is second embodiment's a shape assumption diagram.

Fig. 9 is the structure principle chart of the 3rd embodiment (rotor axis meets at right angle).

Figure 10 is the sectional view (being with three fan tooths) of the another kind of rotor of first embodiment of the invention.

In the drawings, 1. housing, 2. end cap, 3.A piston wheel rotor, 4.B piston wheel rotor, 5. bearing, 6. gear train, 7. external diameter R arc surface, 8. internal diameter r arc surface, 9. envelope surface, 10. enter the chamber, 11. discharge sides, 12. nozzles, 13. seal groove, 14.A piston wheel awl rotor, 15.B piston wheel awl rotor, 16. the tooth cover, 17. male cone (strobilus masculinus)s, 18. inner conical surfaces, 19.A piston wheel right angle rotor, 20.B piston wheel right angle rotor, 21. bevel gear set, 22. outer cylinder, 23. inner cylinder, 24. exhaust ducts, 25. outlet pipe, 26. suction tude, 27. circular cone chassis, 28. toothed axle, 29. circular cone fan tooths, 30. fan tooths.

Embodiment

In Fig. 1 and Fig. 2, rotary piston-wheel type gas motor is made up of housing (1), end cap (2), A piston wheel rotor (3), B piston wheel rotor (4), nozzle (12), seal groove (13), bearing (5), suction tude (26), outlet pipe (25) and gear train (6), and gear train (6) makes A piston wheel rotor (3) and B piston wheel rotor (4) with certain synchronization uniform rotation.A piston wheel rotor (3) is identical with B piston wheel rotor (4) structure, it is the cylindrical body that has two (also can more than two) fan tooths on the axle, be by external diameter R arc surface (7), internal diameter r arc surface (8) and envelope surface (9) are formed, external diameter R arc surface (7), the common heart of internal diameter r arc surface (8), two intersection point lines of external diameter circular arc that the envelope on the fan tooth shaft section is corresponding with it and internal diameter circular arc are crossed the center of circle of circular arc, A piston wheel rotor (3) and B piston wheel rotor (4) are installed on the end cap (2) by bearing (5), A piston wheel rotor (3) and B piston wheel rotor (4) and housing (1) be close (having micro-gap), the internal diameter r arc surface (8) of the external diameter R arc surface (7) of A piston wheel rotor (3) and B piston wheel rotor (4) be close (having micro-gap), envelope surface (9) can make A piston wheel rotor (3) and B piston wheel rotor (4) in the uniform rotation process, does not interfere between the fan tooth of two rotors.A piston wheel rotor (3) and B piston wheel rotor (4) and housing (1) and surperficial two the swept volume chambeies that form of end cap (2): enter chamber (10) and discharge side (11), be close between A piston wheel rotor (3) and B piston wheel rotor (4) and the end cap (2) and (small gap arranged, utilize the motive sealing of gas to come the leakage of control gaseous), its working principle is: high-pressure gas medium is entered in the rotary-piston wheel gas motor by suction tude, and through nozzle (12) gas medium is expand into and to enter in the chamber (10), gas medium is at nozzle (12) the formation high velocity air of locating to expand, the external diameter R arc surface (7) of A piston wheel rotor this moment (3) is close with B piston wheel rotor (4) internal diameter r arc surface (8) (has small gap, utilize the motive sealing of gas to come the leakage of control gaseous), the kinetic energy of high velocity air promotes A piston wheel rotor (3) and rotates, enter chamber (10) simultaneously and have pressure difference with discharge side (11), its static pressure also promotes A piston wheel rotor (3) and rotates, B piston wheel rotor this moment (4) separates and enters chamber (10) and discharge side (11), plays sealing process.When A piston wheel rotor (3) drives B piston wheel rotor (4) when turning over several angle by gear train (6), the internal diameter r arc surface of A piston wheel rotor (3) and B piston wheel rotor (4) external diameter R arc surface are close and (small gap are arranged, utilize the motive sealing of gas to come the leakage of control gaseous), enter chamber (10) and promote B piston wheel rotor (4) rotation with the static pressure of discharge side (11) and the high velocity air of nozzle (12) formation, A piston wheel rotor (3) plays sealing process, and A piston wheel rotor (3) and B piston wheel rotor (4) are constantly alternately finished the effect of acting and sealing like this.The sealing mechanism of rotary-piston wheel is the motive sealing of non-contacting gas, it need seal three parts, the one, the gap between piston wheel rotor diameter arc surface and the housing (1), two is two piston wheel gap between rotor, the 3rd, the gap between piston wheel two sides of rotor and the end cap (2), its sealing mechanism is: one. on housing (1), have seal groove (13), A piston wheel rotor (3) and B piston are taken turns rotor (4) in housing (1) during high speed rotating, seal groove (13) can be static with being attached to piston wheel rotor high-speed gas stagnation, and formation pressure ring, it acts on similar piston ring, and several sealed groove (13) plays the gas leakage in sealing A piston wheel rotor (3) and B piston wheel rotor (4) and housing (1) gap; Two. entering in the chamber (10) of rotary piston-wheel type gas motor, pressurized gas are located to expand into low pressure by high pressure at nozzle (12), produce very high air-flow, this high speed airflow makes the zone at A piston wheel rotor (3) and B piston wheel rotor (4) place of being meshed become a low pressure area again, it can stop gas to leak from the gap of A piston wheel rotor (3) and B piston wheel rotor (4), in addition, very little for A piston wheel rotor (3) and B piston wheel rotor (4) gap, rotor high-speed rotates, rotor drives the gas motion in the boundary layer, if there is gas leakage, must be 0 with the high-speed stagnation of the gas of boundary layer so, and then to flow out in the other direction, this also suppresses gas leakage: there are micro-gap in three .A pistons wheel rotor (3) and B piston wheel rotor (4) with end cap (2), on the side of A piston wheel rotor (3) and B piston wheel rotor (4), perhaps on the side of end cap (2), open some sulculuses, the sealing mechanism that this is similar to rotor and housing (1) utilizes the shearing force acting in conjunction of pressure difference that sulculus produces and gas to reach the motive sealing of gas.The effect of envelope surface (9) is to prevent to interfere phenomenon in A piston wheel rotor (3) and B piston wheel rotor (4) rotation process.After gas medium entered discharge side (11), discharge side (11) diminished along with A piston wheel rotor (3) and B piston wheel rotor (4) rotate volume, and gas medium is discharged in outlet pipe (25).The intersection point line of the envelope on the piston wheel rotor shaft cross section and the intersection point of respective outer diameters R circular arc and envelope and corresponding internal diameter r arc surface is by the center of circle of circular arc, and the equation of envelope is:

$\left\{\begin{array}{c}X=\cos (\mathrm{\&theta;}-\mathrm{\&alpha;})\&times;{[{(R+r-R\cos \mathrm{\&theta;})}^2+{\mathrm{<figure-callout\; id="2"\; label="R"\; filenames="A20061009191900101.png,A20061009191900131.png"\; state="\{\{state\}\}">R</figure-callout>}}^2{\mathrm{<figure-callout\; id="2"\; label="sin"\; filenames="A20061009191900101.png,A20061009191900131.png"\; state="\{\{state\}\}">sin</figure-callout>}}^2\mathrm{\&theta;}]}^{}\\ Y=\sin (\mathrm{\&theta;}-\mathrm{\&alpha;})\&times;{[{(R+r-R\cos \mathrm{\&theta;})}^2+{\mathrm{<figure-callout\; id="2"\; label="R"\; filenames="A20061009191900101.png,A20061009191900131.png"\; state="\{\{state\}\}">R</figure-callout>}}^2{\sin }^2]}^{}\\ \mathrm{\&alpha;}=\mathrm{arctg}[R\sin \mathrm{\&theta;}/(R+r-R\cos \mathrm{\&theta;})]\\ 0\&le;\mathrm{\&theta;}\&le;\arccos [(R+r)/\left(2R\right)]\end{array}\right.$

X, Y work mark initial point is the concentrically ringed initial point in piston wheel rotor shaft cross section in this equation, X-axis is by the intersection point of the corresponding r with it of envelope, R circular arc, by the given different θ value envelope that can draw, this envelope is referred to as theoretical envelope, and in fact as long as theoretical envelope envelope is not interfered when any one interior envelope can make two piston wheel rotors rotate synchronously.

Fig. 3 is a kind of shape assumption diagram of rotary-piston wheel gas motor, its structure is on piston wheel end cap (2) side exhaust duct (24), outlet pipe (25) and suction tude (26) to be installed, gas medium enters in the rotary-piston wheel gas motor from suction tude (26), expand and promote piston wheel rotor rotation acting, gas medium after the acting enters outlet pipe (25) by two side exhaust ducts (24), is discharged by outlet pipe (25).Side exhaust duct (24) is out on the end face near the axle center, is guaranteeing not make under the situation that enters chamber and discharge side connection, utilizes the kinetic energy of gas high speed rotating to continue to promote piston wheel rotor expansion acting, deepens energy utilization ratio.

In Fig. 4, rotary-piston wheel gas motor is made up of housing (1), A piston wheel awl rotor (14), B piston wheel awl rotor (15), end cap (2), outlet pipe, suction tude, bearing (5) and tooth cover (16) and nozzle, A piston wheel awl rotor (14) is identical with B piston wheel awl rotor (15) structure, is fixed on the end cap (2) by bearing (5).One end of A piston wheel awl rotor (14) and B piston wheel awl rotor (15) axle has tooth, links by tooth cover (16).Tooth cover (16) makes A piston wheel awl rotor (14) and A piston wheel awl rotor (14) with certain synchronization uniform rotation.It is the cone that has two (also can more than two) fan tooths on the axle that A piston wheel awl rotor (14) and B piston wheel are bored rotor (15), form by male cone (strobilus masculinus) (17), inner conical surface (18) and envelope surface, the male cone (strobilus masculinus) (17) of A piston wheel awl rotor (14) is close (and having micro-gap) with the inner conical surface (18) that the B piston is taken turns awl rotor (15), and envelope surface can make A piston wheel awl rotor (14) and B piston wheel bore between the fan tooth of rotor (15) uniform rotation and not interfere.Two swept volume chambeies that A piston wheel awl rotor (14) and B piston wheel awl rotor (15) and housing (1) and end cap (2) surface form: enter chamber and discharge side, between A piston wheel awl rotor (14) and the B piston wheel awl rotor (15), be close (having small gap) between A piston wheel awl rotor (14) and B piston wheel awl rotor (15) and housing (1) and the end cap (2), its working principle is: high-pressure gas medium is flowed into by suction tude, expand into high velocity air injects and enters the chamber at the nozzle place, if being close with B piston wheel awl rotor (15) inner conical surface (18), the male cone (strobilus masculinus) (17) of A piston wheel awl rotor this moment (14) (has small gap, the leakage that utilizes the motive sealing of gas medium to come the control gaseous medium), A piston wheel awl rotor (14) plays the effect that enters chamber and discharge side of isolating.Gas medium kinetic energy at a high speed promotes B piston wheel awl rotor (15) with the pressure reduction that enters chamber and discharge side and rotates, B piston wheel awl rotor (15) drives A piston wheel awl rotor (14) by tooth cover (16) and rotates, when A piston wheel awl rotor (14) and B piston wheel are bored after rotor (15) turns over several angle, the inner conical surface of A piston wheel awl rotor (14) is also just taken turns the male cone (strobilus masculinus) of boring rotor (15) with the B piston and is close, B piston wheel awl rotor (15) plays the effect that enters chamber and discharge side of isolating, gas medium promotes A piston wheel awl rotor (14) and rotates, A piston wheel awl rotor (14) drives B piston wheel awl rotor (15) by tooth cover (16) and rotates, A piston wheel awl rotor (14) and B piston wheel awl rotor (15) are alternately finished acting and closed process like this, the effect of envelope surface is to prevent to interfere phenomenon in A piston wheel awl rotor (14) and B piston wheel awl rotor (15) rotation process, diminish along with A piston wheel awl rotor (14) and B piston wheel awl rotor (15) rotate the discharge side volume, gas medium is discharged in outlet pipe.This gas motor utilizes the gas dynamic seal mechanism to seal, its dynamic seal mechanism is: have seal groove on housing (1), piston wheel awl rotor is in housing (1) during high speed rotating, seal groove can be static with being attached to piston wheel rotor high-speed gas stagnation, and formation pressure ring, it is bad that it acts on similar piston, and the several sealed groove plays the gas leakage in packed-piston wheel awl rotor and housing (1) gap; Entering in the chamber of rotary piston-wheel type gas motor, high-pressure gas medium goes out high pressure at the nozzle place and expand into low pressure, produce high velocity air, this high speed airflow makes the zone at A piston wheel awl rotor (14) and B piston wheel awl rotor (15) place of being meshed become a low pressure area again, and it can stop gas to leak from the gap that enters chamber and discharge side; There are micro-gap in A piston wheel awl rotor (14) and B piston wheel awl rotor (15) with end cap (2), on the side of A piston wheel awl rotor (14) and B piston wheel awl rotor (15), perhaps on the side of end cap (2), open some sulculuses, the sealing mechanism that this is similar to rotor and housing (1) utilizes the shearing force acting in conjunction of pressure difference that sulculus produces and gas to reach the motive sealing of gas.Two piston wheel rotors also can pass through bevel gear set, intact to the interlock of joint mechanism.

Fig. 5 is the profile of piston wheel awl rotor, it is made up of circular cone chassis (27) and the axle (28) that has a tooth, and circular cone chassis (27) are extruded with circular cone fan tooth (29) (be illustrated as two circular cone fan tooths, also can more than two), the sectional view of its B-B is Fig. 6, and the sectional view of its C-C is Fig. 7.In Fig. 6, circular cone chassis (27) outwards outstanding circular cone fan tooth (29) has male cone (strobilus masculinus) (17) on the circular cone fan tooth (29), the axle (28) that has tooth is arranged on circular cone chassis (27).In Fig. 7, circular cone chassis (27) have inner conical surface (18), and the axle (28) that has tooth is arranged on circular cone chassis (27).

Fig. 8 is that obtuse-angulate shape assumption diagram is intersected in rotary-piston wheel gas motor rotor axle center, and suction tude (26) and outlet pipe (25) are tangent with rotary-piston wheel gas motor rotor, and this can reduce energy loss.

In Fig. 9, rotary-piston wheel gas motor is made up of housing (1), A piston wheel right angle rotor (19), B piston wheel right angle rotor (20), end cap (2), bearing (5), suction tude, outlet pipe and bevel gear set (21) and nozzle, A piston wheel right angle rotor (19) is identical with B piston wheel right angle rotor (20) structure, is installed on the end cap (2) by bearing (5).Bevel gear set (21) makes A piston wheel right angle rotor (19) and B piston wheel right angle rotor (20) with certain synchronization uniform rotation.A piston wheel right angle rotor (19) and B piston wheel right angle rotor (20) are the cylindrical bodys that has two or more fan tooths, it is by outer cylinder (22), inner cylinder (23) and envelope surface and side are formed, A piston wheel right angle rotor (19) and B piston wheel right angle rotor (20) have micro-gap with housing (1) and end cap (2), the inner cylinder of corresponding another piston wheel right angle rotor in the side of a piston wheel right angle rotor, and have a micro-gap, envelope surface can make A piston wheel right angle rotor (19) and B piston take turns between the fan tooth of right angle rotor (20) uniform rotation and not interfere, A piston wheel right angle rotor (19) and B piston wheel right angle rotor (20) and housing (1) and surperficial two the swept volume chambeies that form of end cap (2): enter chamber and discharge side, between A piston wheel right angle rotor (19) and the B piston wheel right angle rotor (20), be close (having small gap) between A piston wheel right angle rotor (19) and B piston wheel right angle rotor (20) and housing (1) and the end cap (2), its working principle is: high-pressure gas medium is flowed into by suction tude and nozzle and enters the chamber, if the inner cylinder (23) of the side of A piston wheel right angle rotor this moment (19) and B piston wheel right angle rotor (20) is close and (small gap is arranged, the leakage that utilizes the motive sealing of gas medium to come the control gaseous medium), high-pressure gas medium expands at the nozzle place, form high velocity air, the kinetic energy of air-flow and pressure reduction promotion B piston wheel right angle rotor (20) rotation that enters chamber and discharge side, B piston wheel right angle rotor (20) drives A piston wheel right angle rotor (19) by bevel gear set (21) and rotates, when A piston wheel right angle rotor (19) and B piston are taken turns after right angle rotor (20) turns over several angle, the side of the inner cylinder of A piston wheel right angle rotor (19) and B piston wheel right angle rotor (20) is close, B piston wheel right angle rotor (20) plays and will enter the effect that chamber and discharge side separate, gas medium promotes A piston wheel right angle rotor (19) and rotates, A piston wheel right angle rotor (19) drives B piston wheel right angle rotor (20) by bevel gear set (21) and rotates, A piston wheel right angle rotor (19) and B piston wheel right angle rotor (20) are constantly alternately finished acting and sealing process like this, the effect of envelope surface is to prevent to interfere phenomenon in A piston wheel right angle rotor (19) and B piston wheel right angle rotor (20) rotation process, diminish along with A piston wheel right angle rotor (19) and B piston wheel right angle rotor (20) rotate volume, gas medium is discharged in outlet pipe.

Figure 10 is the sectional view of three fan tooths of rotary-piston wheel gas motor rotor band, in housing (1), two piston wheel rotors are installed, each piston wheel rotor has three fan tooths (30), all the other same first embodiment of the invention, certainly, rotary-piston wheel gas motor rotor can be made the fan tooth more than three, explanation no longer one by one.

Rotary-piston wheel gas motor also can be used in the flowing medium of low pressure and mass flow, as be used in water, other flowing mediums of wet goods, and the leakage of micro-gap is little to its influence under the situation of cancellation nozzle.

Claims (8)

1. a gas motor (or steam or combustion gas motor), form by housing, end cap, two piston wheel rotors, bearing and one group of clutch, it is characterized in that: piston wheel rotor is to have two or more are made of fan tooth external diameter (awl) arc surface, internal diameter (awl) arc surface and envelope surface rotor on the axle, envelope surface does not interfere when two piston wheel rotors are rotated synchronously, and clutch makes two piston wheel rotors with certain synchronization uniform rotation.

2. gas motor according to claim 1, it is characterized in that piston takes turns the axle center that two intersection point lines of envelope on the epitrochanterian fan tooth shaft section and external diameter circular arc and internal diameter circular arc are crossed rotor, two intersection points of envelope on the fan tooth shaft section and external diameter circular arc line and internal diameter circular arc line are crossed the center of circle of circular arc, and the envelope equation is

$\left\{\begin{array}{c}X=\cos (\mathrm{\&theta;}-\mathrm{\&alpha;})\&times;\&lsqb;(R+r-R\cos \mathrm{\&theta;}{)}^2+R^2\mathrm{si}{n}^2\mathrm{\&theta;}{\&rsqb;}^{1/2}\\ Y=\sin (\mathrm{\&theta;}-\mathrm{\&alpha;})\&times;\&lsqb;(R+r-R\cos \mathrm{\&theta;}{)}^2+R^2\mathrm{si}{n}^2\mathrm{\&theta;}{\&rsqb;}^{1/2}\\ \mathrm{\&alpha;}=\mathrm{arctg}\&lsqb;R\sin \mathrm{\&theta;}/(R+r-\cos \mathrm{\&theta;})\&rsqb;\\ 0\&le;\mathrm{\&theta;}\&le;\arccos \&lsqb;(R+r)/\left(2R\right)\&rsqb;\end{array}\right.$

X, Y work mark initial point is the concentrically ringed initial point in piston wheel rotor shaft cross section in this equation, X-axis is by the intersection point of envelope and internal diameter r circular arc, external diameter R circular arc, by the given different θ value envelope that can draw, this envelope is referred to as theoretical envelope, and in fact as long as theoretical envelope envelope is not interfered when any one interior envelope can make two piston wheel rotors rotate synchronously.

3. gas motor according to claim 1 is characterized in that gas medium expand to produce high velocity air at the nozzle place, utilizes airflow kinetic energy and enter the chamber to promote rotary-piston wheel rotor jointly with the draught head of discharge side and do work.

4. gas motor according to claim 1, it is characterized in that: the sealing mechanism of rotary-piston wheel is the motive sealing of non-contacting gas, it need seal three parts, the one, the gap between piston wheel rotor diameter face and the housing, its sealing is to have a series of sulculus vertically in inner walls, utilize gas to have viscosity, to be static attached to high velocity air stagnation on the piston wheel rotor of high speed rotating, produce compression ring, it acts on similar piston ring, stops to leak, and also can take turns on the rotor at piston and have " V " shape groove vertically, utilize identical sealing mechanism, also can produce seal action; The 2nd, the gap between piston wheel two sides of rotor and the end cap, its sealing is to open a series of grooves that seal on the side of piston wheel rotor, also can on end cap, open series of grooves, utilize the motive sealing that is used for reaching the gap of the viscosity of gas and sulculus compression ring; Three is two piston wheel gap between rotor, its sealing mechanism is that gas medium expands in nozzle, produce very high air-flow, by the design airflow direction, the zone that makes two rotors combine becomes a low pressure area, and the gap utilizes this low pressure area to seal between two piston wheel rotors, because two piston wheel rotor clearances are very little, piston wheel rotor is again a high speed rotating, and piston wheel rotor drives the gas motion in the boundary layer, and the moving direction of this air-flow can suppress to leak.

5. gas motor according to claim 1, it is characterized in that having on the housing side exhaust duct, outlet pipe and suction tude, side exhaust duct is out on the side end near the axle center, guaranteeing not make under the situation that enters chamber and discharge side connection, utilize the kinetic energy of gas high speed rotating continue to promote piston wheel rotor expansion acting, the outlet pipe on the end cap is discharged from the side again.

6. gas motor according to claim 1, two piston wheel rotor axis can be parallel, also can be acute angle or obtuse angle, when it is obtuse angle or obtuse angle, rotor is a piston wheel awl rotor, it is characterized in that two piston wheel awl rotor structures are identical, it is the cone that has two (also can more than two) fan tooths on the axle, it is made up of male cone (strobilus masculinus), inner conical surface and envelope surface, its a end has tooth, by the interlock of tooth cover, the tooth cover makes two piston wheel awl rotors with certain synchronization uniform rotation.

7. gas motor according to claim 1, two piston wheel rotor axis can be parallel, also can be acute angle or obtuse angle, when it is obtuse angle or obtuse angle, rotor is a piston wheel awl rotor, the piston wheel awl rotor that it is characterized in that suction tude and outlet pipe and gas motor is tangent, reduces energy loss.

8. gas motor according to claim 1, the axle center of two piston wheel rotors can be for parallel, or be the right angle, when it is the right angle, it is characterized in that piston wheel right angle rotor is the cylindrical body of two or several fan tooths, be by outer cylinder, inner cylinder and envelope surface and bi-side are formed, the inner cylinder of corresponding B piston wheel right angle, the side rotor of A piston wheel right angle rotor, and have a micro-gap, envelope surface can make A piston wheel right angle rotor and B piston take turns between the fan tooth of right angle rotor uniform rotation and not interfere, and bevel gear set makes A piston wheel right angle rotor and B piston wheel right angle rotor with certain synchronization uniform rotation.

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