DE3028201A1 - Axial-piston-movement positive displacement machine - converts piston motion to rotation using annular axial cam and desmodromic follower arrangement - Google Patents

Abstract

The axial piston-movement positive displacement machine uses an axially-profiled cam ring to convert piston motion into piston-axis-parallel rotation. The ring has a profiled face which slopes outwards; below it there are grooves in both wall surfaces running parallel with the profile. Power is transmitted between piston-rod and ring via flanged conical rollers and pivoting-arm mounted roller-followers engaging the grooves. The roller spindle-ends slide in slots parallel to the piston rod. The working-stroke part of the cam surface covers a substantially larger angle than that for suction- and compression-strokes.

Description

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Axial piston motor with different lift heights in Intake-compression or working udd discharge cycle.

General:

Axial piston machines are known and, above all, as pumps with a swash plate drive on the market.

Axial piston motors are sirid for a number of reasons wanted, so far ^ but not yet proposed in a usable version. Let it be on the DE-OS 2117708 referenced. In it is an axial piston engine with a cylinder-groove-roller T ^ iebwerk suggested. This suggestion was never used.

An implementation of this proposal would have resulted in a functional unit.

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In the following, a construction for an axial piston motor will now be used as an illustration and as a suggestion brought the weighty advantages and advantages over other engine types both in terms of manufacturing technology as well as especially in operational terms.

Description:

In the accompanying drawings and sketches, Fig. I, Fig. II and Fig. III, the execution e.g. a 4-cylinder axial piston engine and adequately represented.

The drawings contain:
Fig. I:

Development of the lifting rail ring with a shamatic representation of the pistons, cylinders and the combination of rollers .

Fig. II:

Axial section through the entire engine without cylinder or valve head «

Fig. III:

Top view of the valve head and a schematic representation of the valves and the valve control "Conical lift-turn valve".

Ϊ30067 / 028β ORIGINAL BATHROOM

In the individual drawings:

Fig. II:

(1) The Hubrinc rail

(la) The grooves for the barrel of the

(2a) Pendulum rollers

(2) The flange rollers are designed as a cone

(3) The axial slide rails for guiding the (3a) shaft surfaces

The running surface of the lifting ring rail is inclined and thus the flange rollers are conical The reason for this is that the speed of rotation of the stroke ring is proportional to the radius decreases inward, causing cylindrical rollers from rolling friction into sliding ones Friction would come. This change in speed is made with conical rollers compensated.

The pendulum rollers (2a) have I functions.They cause a perfect frictional connection in the up and down movements of the track crane rollers (2) with the running surface of the lifting ring rail and they absorb the negative moment of force under the pressure between the flange roller and the running surface of the lifting ring rail, so that in connection With the axial slide rails (3) and the shaft surfaces (3a), no side forces can act on the piston (no oval running piston / cylinder, less friction! I)

(4) Piston rod, this is firmly connected to

(5) the piston

(6); Cylinder: -with

(6a) aen outlet slots

(7) Cam disc in connection with

(8) the shaft

Fig. I:

Representation of the development of the lifting ring rail over 360 with a schematic representation of the flange rollers and spherical rollers related to the position of the pistons in the cylinders.

As can be seen, the intake and compression strokes extend over 80 degrees of arc while the working stroke and the ejection stroke each claim 100 degrees of arc of the stroke ring rail.

- / 3

130067/0288

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The stoiounn of the inclined surface of the lifting ring rail in the running direction rr.u-i iu uareich el or; Arb -. .Lt ^ hubrii-; exactly 45 ° batr -'- rjan »Ei £ are the same conditions here before ·.;. ".- ■■ bci ^ Hüiintiui helical gear, at which Change driving wheel and qii. ^ I level wheel. Here it is Working stroke ~ transfer of the force from the piston on the rails - and starting bsv. delay - Transmission of the force torque from the rail on the piston

The suction and compression stroke, each extending over 80 degrees of arc, can have a very flat incline included, as a force moment only from the Hubringschicne on the piston and never the other way around.

As can be seen from Fig. I, it follows that the working stroke - with the same top dead center is essential is longer than the intake and compression strokes. This enables complete combustion.

The piston running after bottom dead center exposes the outlet slot (6a) so that - via a possible very large cross-section - the combustion gases escape as soon as the piston descends can. In this way, the work of expulsion is practically reduced to zero and the exit speed of the gases through the outlet valve is significantly reduced (noise reduction) (see Carnot cycle).

Figi III:

(20) Top view of the cylinder head with the arrangement of the valves and cam disk

(21) Axial section through inlet valve

(22) Hub rotary thread

(23) Adjusting thread for valve clearance

(24) Radial section through inlet valve

(25) Radial section through the exhaust valve

As can be seen from the Skiizen, it is are valves in which suction and discharge occur in two perpendicular directions Levels is done. Since these are conical lift-turn valves, the drive and the Stuusrrmg very easy.

Leave exit and entry cross-sections make themselves larger than with conventional poppet valves and the inflow conditions are much cheaper than the poppet valve.

13 0 0 6 7/0286 " ^{/ 4} BAD ORfGiNAl

Claims (8)

"*" 3073201 Expectations: Axial piston motor characterized in that the vertical movement of the pistons by means of a The stroke ring rail is converted into a rotary movement parallel to the piston axis, 2) that the lifting ring rail has an inclined running surface and one on the inside and one on the outside has a groove parallel to the running surface, 3} that the connection of force between the piston and piston rod by means of conical flange rollers and with these pendulum rollers at a fixed distance, which engage in the two grooves is accomplished, 4). the two ends of the track crane axis in v / earth slots parallel to the piston rod, 5) that the stroke ring rail is designed so that the working stroke is significantly longer than the intake and compression stroke (see turbocharger) _β 6) that the stroke ring rail has exactly a running surface angle of 45 in the working stroke, while the running angle for the intake and compression stroke is as flat as possible, 7) that the running surface of the lifting ring rail is shaped so that per revolution of the lifting ring rail the same revolution of the working shaft a full 4 cycles can be processed. Na «= N (number of work cycles «S number of revolutions), 8) that the cylinders are provided with slots towards the bottom dead center, from the downwards going piston are released and the outflow of combustion gases during of the piston that is still down or stationary, 9}) that the motor with easy to control conical Lift rotary valves with a cam Schelban drive is equipped. 130067/0286 JWO ORIGINAL