JPS6338601A - Rotary engine - Google Patents

Abstract

PURPOSE:To reduce leakage of gas from axial both ends of a rotor, by smoothening a motion of an apex seal for improving the following motion of this apex seal on a sliding surface of a rotor housing, and raising air-tightness between the apex seal and said sliding surface. CONSTITUTION:Recessed grooves 7 are formed on both side walls of a seal groove, piercingly between axial both ends, plural slender rollers 5 are contained in these recessed grooves 7, and an apex seal 3 and the side walls of the seal groove are rollingly contacted with each other through these rollers 5. In this way, a motion (a radial motion) of the apex seal 3 is smoothened. On the other hand, as the rollers 5 and the recessed grooves 7 which contain these rollers 5, are contained in a corner seal 6 which is attached onto both sides of the top of a rotor, for being covered with this corner seal 6, a route for combustion gas (or compressed gas) from the bottom of the seal groove 8 of the apex seal 3, is intercepted, and consequently, leakage of gas is reduced, and good airtightness can be got.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of an apex seal portion at the apex of one rotary engine.

In particular, a roller is incorporated between the seal groove side wall at the rotor apex and the apex seal to reduce the weight of the apex seal (in the radial direction) and improve the airtightness between the rotor housing and the apex seal. This relates to improvements to the rotary engine.

By the way, in order to make the apex seal easier to handle, it is more effective to support the entire width of the apex seal with a roller as much as possible.
It is best to make a through hole (along the axial direction).

However, when the rollers are inserted across the entire width of the rotor, the concave grooves that accommodate the rollers become gas passages, and the combustion gas (or compressed gas) introduced into the seal groove of the apex seal flows onto the side of the rotor. This leaks out and makes it difficult to see between the two adjacent operations 7.

Therefore, the present invention aims to lighten the movement of the apex seal to better follow the sliding surface of the rotor housing, improve airtightness with this sliding surface, and reduce gas leakage from both ends of the rotor in the axial direction. Located in providing rotary engine.

Embodiments of the present invention will be described below with reference to the drawings.

1 is the sliding surface of the rotor housing, 2 is the rake apex, 3 is the apex seal, 4 is the seal; 1η side wall, 5
is a roller, 6 is a corner seal, and 11 is an apex seal spring.

As shown in FIGS. 1 and 2, a concave groove 7 is formed in the seal groove side wall 4 across both ends in the axial direction, and a plurality of thin rollers 5 are housed in the concave groove 1. J: The rear pex seal 3 and the seal groove side wall 4 are brought into rolling contact with these rollers 5.

On the other hand, corner seals 6 and 6 that abut against the side housings 9 of the seal groove 8 are incorporated at both ends in the axial direction, and the rotor 5
The roller side edge is not exposed to the rotor side edge.

The corner seals 6 and 6 on both sides usually have a cylindrical bottle shape as a whole, but as shown in FIG. 3, a part of the cylinder is cut to form a roller accommodating part 10, making it L-shaped. .

With the corner seals 6 and 6 having such shapes installed, store the concave groove 7 for storing the roller 5 and both ends of the roller 5 in the housing part 10 of the corner seal 6, and expose them to the rotor outer shell. It's sea urchin.

According to the present invention as described above, the apex seal 3 extends almost over the entire width of the roller 5.
The rollers 5 and 5 that support this apex seal 3 and the concave groove 7 that accommodates these rollers 5 and 5 are formed on both sides of the rotor apex. ni group i →
(The combustion gas from the bottom of the seal groove 8 of the apex seal 3 (also
As a result of the (crude gas) passage being blocked, there is less leakage of these gases and good airtightness is achieved.

[Brief explanation of drawings]

Figure 1 is a side view of the main part, Figure 2 is a cross section of the main part 1...
Sliding surface of rotor housing, 2... Rotor apex, 3... Apex seal, 1... Seal groove side wall, 5... Roller, 6... Corner seal, 7...
... Concave groove, 8... Seal groove, 9... Corner seal roller housing, 1st Run 21 2nd @ Semi-5m

Claims (1)

[Claims] In a rotary engine in which a rotor is inserted between a seal groove side wall at the apex of the rotor and an apex seal, and the seal groove side wall and the apex seal are brought into rolling contact, the roller is moved through a recess formed in the seal groove side wall. A rotary engine in which the concave groove and both side end faces of the roller are housed inside both corner seals built into both sides of the rotor so that they are not exposed to both end faces of the rotor.