DE3508072A1 - Planetary compressor - Google Patents

Abstract

The invention relates to a planetary compressor (valve-free and without a pressure vessel) corresponding to a positive-displacement pump for gases or liquids and resembling the rotary piston engine, but, instead of the two-arc epitrochoidal housing cavity, has an internally toothed geometrically accurate elongate hole which is to be regarded as a fixed internal gear. Three chambers are formed by three externally toothed planet wheels which mesh with the internal wall of the internal gear and, together with the planet carrier, give approximately the shape of a polygon profile. By means of the driving eccentric shaft mounted centrally, rotatably and in a fixed location, the planet carrier likewise mounted rotatably on the eccentric, together with its planet wheels, is set in rotation, meshing with the internal wall, and, as a result, the three chambers form moving volumes which vary twice from their smallest to their largest volume and vice versa for each revolution of the shaft. The three arcuate control edges of the polygonal planet carrier give valve-free control of the inlet and outlet holes located in the side covers, resulting in a continuous delivery flow. The compact, low-vibration and low-noise variant with its comparatively large displacement volumes opens up a large range of applications in refrigeration, heat, compressor and vacuum technology. There is also the possibility of using it as a suction or pressure pump for solids-free liquids and also as an air or ... Original abstract incomplete.

Description

Planetary compressor

The invention relates to a planetary compressor according to the principle a positive displacement pump for gases and liquids similar to the rotary piston engine but instead of the 2-arched epitrochoid housing cavity, an internally toothed, geometrical one exact elongated hole, which is to be regarded as a fixed ring gear.

With three externally toothed planetary gears meshing inside the ring gear, which together with the planetary carrier approximately result in the shape of a polygonal profile three chambers are formed, which are constantly their due to the rotational movement of the planet carrier Volume change from minimum to maximum and vice versa and continuously a continuous one Conveyor stran result.

Planetary compressors of this type are used in the fields of Pneumatics and hydraulics can be used as a compressor (pump) or motor. By its disc-shaped structure is also suitable as a multi-stage compressor to achieve particularly high pressures.

It is usually common for single-shaft rotary or rotary piston compressors the delimitation of the individual chambers by sliding inside the housing and radially to achieve movable sealing strips or lamellas.

Compressors of this type often show higher rates after some running time Press signs of wear due to the one-sided pressure load and the simultaneous radial stroke-like movements on the lateral sliding surfaces and guide slots as well as the end faces of the lamellas, which provide a long-term optimal seal not guarantee.

The invention is based on the object with an inexpensive Manufacture an optimal seal of the chambers in a simple but effective way Kind of long-term guarantee.

This object is achieved according to the invention in that at each Limitation of the individual KarrPnem by the meshing of the planet gears with the ring gear results in an optimal seal.

Through the rolling movement of the teeth on their respective tooth flanks the surface on the tooth tip is not loaded. With the tooth tip surface of approx. 2/3 of the The number of teeth of each planet gear becomes the same as a shaft in a plain bearing held and positioned in one of the three holes in the planet carrier.

The following advantages result: simple, inexpensive production, relative high pulsation-free continuous operating pressure, optimal pumping speed, small size with large funding volume, multi-stage can be linked, high life expectancy.

The invention is based on drawings of an embodiment explained.

Fig. 1 plan view of an open planetary compressor shown in simplified form with housing ring gear and inserted planet carrier as well as its meshing Planet gears Fig. 2-4 like Fig. 1, but with the position of the planet carrier changed in each case and the resulting control of the inlet and outlet bores.

Description: Part 1 is at the same time with its slot internal toothing (1) Housing and not movable.

Will part 4, the one-piece drive eccentric shaft, which is rotatably mounted in the center of the housing and rotated in the direction of the arrow, becomes the planet carrier (3), which is mounted on the eccentric (4) with a roller or plain bearing moved to an orbital movement within the elongated hole, in which the planet gears (2) one in mesh (5).

Due to the arch shape (9) of the planet carrier (3), the inlet bores (7) and the outlet bores (8), which are located on the side of the housing cover open or closed.

Due to the interplay of the fixed housing cavity as an elongated hole and the polygon-like planet carrier (3) with its planetary gears that is movable therein (2) the chambers (6) are from their minimum to maximum volume and vice versa changed, whereby a suction or compression effect is achieved.

Claims (5)

Claims: 1. Planetary compressor, which with its disk-shaped Structure for gaseous, -or. liquid media is characterized by the fact that in its interior a geometrically exact internally toothed elongated hole as a fixed one Ring gear (1) is arranged by three externally toothed, inner-walled crowning planet gears (2), which by a planet carrier (3) in the form of an equilateral arcuate Triangle in the interior of the elongated hole in position and constantly in mesh (5) are held, three chambers (6) are formed, which are driven in the middle by means of a and rotatably mounted stationary ESrzenterAntriebswelle (4) their cavities as Moving volume per shaft revolution 2 times from its smallest to its largest Change content and vice versa. 2. Planetary compressor according to claim 1, characterized in that through the intermeshing teeth (5) of the planet gears to the ring gear optimal sealing of the individual chambers (6) is achieved. 3. Planetary compressor according to claim 2, characterized in that the one or two on the side of the housing cover Outlet bores (7) and (8) controlled valve-free by the arc shape (9) of the rotating planet carrier (3) and thus result in a continuous flow rate, which can also be used as an input or output. Dual circuit system can be switched. 4. Planetary compressor according to claim 3, characterized in that when used as a motor it also corresponds to the structure of a planetary compressor, here but the mode of action is reversed and via the operating pressure and effective area of the planet carrier a torque is generated. 5. Planetary compressor according to claim 4, characterized in that a multi-stage principle is possible due to the disc-shaped design.