JPH02196133A - Roller seal for rotary engine - Google Patents

Abstract

PURPOSE:To improve abrasion resistance and sealability as well as to prevent a roller seal from falling off by setting up the columnar roller seal jutting out of a rotor outer circumferential surface, in a rotor apex angle part, and setting the diameter to be relatively larger, while pressing the rotor. CONSTITUTION:A columnar roller seal 3 jetting out of a rotor outer circumferential surface 2 is set up in a rotor apex angle part 1, and installed in a rotor free of rotation. A diameter of this roller seal 3 is made larger than groove port width D of the rotor outer circumferential surface 2, while the rotor central side is pressed by a elastic body 5 via a shoe 4. At both sides of the rotor, an interval between the roller seal 3 and an O-ring seal 6 in and around an internal gear is partitioned off by a partition seal 7. With this constitution, any abrasion in a rotor housing and the rotor itself is prevented from occurring and sealability is made so batter, while the roller seal 3 is prevented from falling off from the rotor.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a rotary engine among internal combustion engines.

(Prior Art) In conventional rotary engines, wear called wavy chatter marks is likely to occur on the inner surface of the rotor housing, that is, the veritrochoid (hereinafter abbreviated as trochoid) surface.
When this occurred, the performance of the engine was significantly reduced. This chatter mark has been improved by improving the Aspex seal.

Since the Aspex seal slides on the inner surface of the rotor housing in a high-temperature, high-pressure environment, wear of the Aspex seal itself and wear of the inner surface of the rotor housing has not been solved.Also, rotary engine seals are used in high-pressure combustion chambers and low-pressure intakes. Although the chamber is always adjacent to the chamber, the leap seal has only one Aspek seal, and in the case of sWi, only one side seal, and it has been desired to improve the sealing performance.

(Problems to be Solved by the Invention) A first object of the present invention is to provide a rotor seal that improves the life of a rotary engine.

A second object of the present invention is to provide a rotor seal with excellent sealing properties.

(Means for Solving the Problems) The cylindrical roller seal of the rotary engine of the present invention is constructed as follows. That is, as shown in FIG. 1 and FIG. 2, which is an enlarged view thereof, the rotor apex angle [1 is
A cylindrical roller seal 3 protrudes from the rotor and is rotatably installed inside the rotor, and its diameter is larger than the width of the groove on the outer peripheral surface of the rotor.
In the present invention, a cylindrical roller seal is pressed against the outer circumferential surface of the rotor 2. In other words, the 9 cylindrical roller seals that protrude from the trochoid inner envelope line preferentially contact the inner surface of the rotor housing, that is, the trochoid surface, and transfer to prevent wear of the rotor housing and rotor and improve sealing. In the present invention, the diameter of the cylindrical roller seal is made larger than the width of the groove on the rotor's outer peripheral surface in order to prevent the cylindrical roller seal from falling off the rotor. Can be inserted from the axial direction of the groove. The shoe 4 contacts the cylindrical roller seal 3 to close the gap and protects the elastic body 9 from heat and abrasion.By appropriately selecting the material, the shoe 4 can have the function of lubricating and preventing wear of the cylindrical roller seal 3. can.

In the present invention, as shown in FIG. 3 and FIG. 4, which is an enlarged view thereof, a cylindrical roller protrudes from the rotor outer circumferential surface 2 and is rotatably installed in the rotor in close proximity to the rotor top corner 1 and both sides thereof. The seal 3 is a roller seal of a rotary engine, the diameter of which is larger than the width of the groove on the outer circumferential surface of the rotary engine, and the center side surface of the rotor is pressed by an elastic body 5 via a shoe 4. This example has an improvement over the examples shown in FIGS. 1 and 2 in that the cylindrical roller seals are doubled, which further improves the effects of the present invention.

In the present invention, it is further preferable that on both sides of the rotor, the cylindrical roller seal 3 at the top corner of the rotor and the O-ring seal 6 near the internal gear are separated into two sections by connecting them with a seal 7. As a result, the combustion chamber and other chambers are double sealed on the side of the rotor, improving sealing performance and improving engine performance. This division can improve the wear of the seal itself by making the seal a roller to prevent rolling friction, and by dividing it into abrasion of the side surface of the rotor housing.

(Effects of the Invention) Since the present invention is a rotatable roller seal with low frictional force, wear of the seal itself and wear of the inner surface of the rotor housing can be improved. Additionally, since the sealing performance at the boundary between the high-pressure combustion chamber and the low-pressure suction chamber is improved, it is expected that the life and performance of the engine will be improved.

(Field of Application of the Invention) Although the cylindrical roller seal of the present invention has been described with respect to a rotary engine, it is also applicable to hydraulic pumps and motors such as hydraulic pumps and hydraulic motors, air pressure generators and motors such as compressors and pneumatic motors, etc. It can be widely applied to fluid pressure equipment that converts so-called pressure and rotational force.

[Brief explanation of the drawing]

1 to 4 are explanatory diagrams of the apparatus of the present invention, in which FIG. 1 shows a case in which the cylindrical roller seal is provided only at the top corner of the rotor, and FIG. 2 shows an enlarged view of the top corner of the rotor in FIG. 1. FIG. 3 is an enlarged view of the third rotor top corner when the cylindrical roller seal is located close to the top corner of the rotor and both sides thereof. l: Rotor top corner. 2: Rotor outer peripheral surface. 3: Cylindrical roller seal. 4: Shoe 5: Elastic body. 6: O-ring seal. 7: Classification is sticker. Figure 1 Figure 3 Figure 2 Figure 4

Claims (1)

[Claims] 1. A cylindrical roller seal that protrudes from the outer peripheral surface of the rotor at the top corner of the rotor and is rotatably installed inside the rotor has a diameter larger than the width of the groove on the outer peripheral surface of the rotor, and the center side surface of the rotor A rotary engine roller seal characterized by being pressed by an elastic body through a shoe. 2. A cylindrical roller seal protrudes from the rotor outer peripheral surface and is rotatably installed in the rotor in close proximity to the rotor top corner and both sides thereof, and its diameter is larger than the rotor outer circumferential groove width. A rotary engine roller seal characterized by being pressed by an elastic body through a shoe. 3. The rotor according to claim 1 or 2, characterized in that on both sides of the rotor, the cylindrical roller seal portion at the top corner of the rotor and the O-ring seal near the internal gear are connected and partitioned by a partitioning seal. Rotary engine roller seal.