RU2042841C1 - Device for sealing working spaces of rotor internal combustion engines - Google Patents

Abstract

FIELD: engine engineering. SUBSTANCE: device has shafts 1 mounted inside housing 2 of the engine, stops 3-5 secured to the shafts and received in spaces 6 of housing 2 defined by the rotor and housing 2 of the engine, plungers coupled with cams and with stops 3-5 by one end and seals 11 through shafts 1 by the other end. Seals 11 consists of two parts arranged symmetrically in the plane passing through the axis of cylindrical grooves at the ends of stops 3-5 and made up as L-shaped members having semi-cylindrical head mated with the groove on one of its shelves and longitudinal dummy recess axially shifted and partially overlapping the recess of the adjacent member. A spring is mounted inside the recesses for permitting pressing of the members of seal 11 to the opposite ends of the cylindrical groove. The L-shaped members are of different weights. The member of greater weight faces the outer surface of stops 3-5. EFFECT: enhanced efficiency. 4 dwg

Description

 The invention relates to engine building and can be used to seal the axial clearances of a rotary internal combustion engine.

 The need to use this seal is due to the requirements of tightness of working cavities as a necessary condition for the operability of engines.

 The closest in technical essence to the invention is a rotary internal combustion engine in which a cylindrical compression spring is used, which serves to clamp the stops to the surface of the rotor.

 At high rotor speeds (over 2500 rpm), due to the inertia of the springs and stops, the working conditions of the stops change depending on the contact area of the stops with the rotor surface, as a result of which the angle of attack (the angle between the tangent to the rotor surface and the sealing flange) of the contact edge emphasis, which entails different working conditions of the contacting pair: the moment arising under the action of the frictional force, the pair is larger at a larger angle of attack (the shoulder increases), which may entail a significant increase in engine speed Tel'nykh contact stress exceeding permissible.

 The aim of the invention is to increase engine efficiency by improving the performance of seals.

 In FIG. 1 shows a general view of the engine; in FIG. 2, section AA in FIG. 1; in FIG. 3 node I in FIG. 1; in FIG. 4 a section BB in FIG. 3.

 A device for sealing the working cavities of a rotary internal combustion engine contains shafts 1 installed in the engine casing 2, and stops 3-5 fixed on them, placed in the cavities 6 of the casing 2, formed by the rotor 7 and the casing 2 of the engine, pushers 8, connected on one side with cams 9 mounted on the shaft 10 of the rotor 7, on the other through the shafts 1 with stops 3-5 and seals 11. Seals 11 consist of two symmetrically mounted planes passing through the axis of the cylindrical grooves 12 at the ends of the stops 3-5, made in the form L-shaped x elements 13 and 14 with a semi-cylindrical head conjugated with a groove 12 on one of its shelves and a longitudinal blind recess 15, located with axial displacement and partial overlap of the recess 15 of the adjacent element, a compression spring 16 is installed in the combined recesses 15, which is placed there with the possibility of compression elements 13 and 14 of the seal 11 to the opposite ends of the cylindrical groove 12, while the L-shaped elements 13 and 14 are made with different masses, and the element 13, having a large mass, faces the outer surface of the stops 3-5.

 The sealing of the working cavities 6 of the rotary internal combustion engine is as follows.

 Inertial seals 11 are designed with the engine running to seal the internal cavities 6 of the engine, delimited by stops 3-5 along the contact lines of the seals 1 with the generatrix surface of the rotor 7, which determines its profile.

 Since the center of mass of the seal 11 is shifted relative to the axis of rotation of the seal by 1 mm, in the case of accelerated movement of the stops from the center of the engine, inertial forces from 100 to 200 N arise, which provide pressure to the leading edge of the seal against the surface of the rotor 7, thereby sealing the working cavities 6.

 In addition, during the stroke and compression, the clamping of the seals 11 is additionally carried out with a working gas pressure of up to 60 atm.

 Contact with the cylindrical part 17 of the profile of the rotor 7 in the absence of inertial force acts clamping force arising under the action of the friction force on the sidewalls 18 of the rotor 7 under the action of a compression spring 16, developing a force of 10 N.

 Compared with the prototype, the proposed device allows in addition to this type of engine to use seals in other internal combustion engines of the rotor type.

Claims (1)

 DEVICE FOR SEALING WORKING CAVITIES OF A ROTARY INTERNAL COMBUSTION ENGINE, comprising shafts installed in the housing, stops fixed to them, housed in the body cavities, pushers connected through the shafts with stops, and seals, characterized in that the cylindrical grooves are made in the stops, the seals consist of two parts mounted symmetrically to the plane passing through the axis of the cylindrical groove, and made in the form of L-shaped elements with a semi-cylindrical mating head with a groove on one of its shelves and a longitudinal With a deaf blind recess located with axial mixing and partial overlapping of the recess of the adjacent element, a compression spring is installed in the combined recesses, which is located with the possibility of pressing the sealing elements to the opposite ends of the cylindrical groove, while the L-shaped elements are made with different masses, and the element having a large mass, facing the outer surface of the stop.

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