JPS5851419Y2 - rotary engine - Google Patents

Description

[Detailed explanation of the invention] This invention is a Romery engine with a variable working chamber,
In particular, it relates to a rotary engine having reduced static friction between a number of working blades reciprocating within corresponding slots of the rotor to act to seal a variable working chamber against the inner wall of the housing.

It is well known that this invention is applied to rotary engines, but this invention is particularly useful for low-speed engines that have a number of radially movable actuators inside the slots of a cylindrical rotor that rotates within a housing. It can be applied to % of rotary engines.

These actuators are guided sealingly by cam followers along the inner wall of the housing so as to form a crescent-shaped actuating chamber surrounding the rotor.

In rotary engines of this type, working chambers spaced around the rotor are separated from each other by working implements that slide along the inner wall of the housing.

Therefore, the reliable and satisfactory operation of a rotary engine is largely dependent on whether the actuator is firmly in contact with the inner wall of the housing so as to effectively separate the individual working chambers.

In order to achieve this state, the known Romery engine is equipped with an actuator that is pressed against the inner wall of the housing by applying a spring force to the bottom of the actuator or by applying fluid pressure to the actuator. Was.

However, such a mechanism of known rotary engines has a special operating range.

For example, in the low-speed rotation range, if the actuating tool separates from the inner wall of the housing, it is often unsatisfactory because it does not adhere sufficiently to the inner wall of the housing and self-induced movement occurs, resulting in the formation of a fluid short-circuit condition. It has been proven.

This is because a very large static frictional force exists between the actuating tool and the slot of the rotor into which the actuating tool is slidably fitted, and this phenomenon occurs at low speeds and at high operating pressures. This is most important when the media film formed between the actuator and the slot of the rotor is interrupted.

This problem also occurs very often when a rotary engine begins to move from a rest position with maximum load, or when a sudden load reversal occurs.

The object of this invention is to devise a rotary engine which eliminates the drawbacks of known rotary engines by improving the contact condition of the actuator with the inner wall of the housing within the entire operating range of the engine.

Therefore, in this invention, a large number of small recesses or blind holes are formed at least in the upper part of the side surface on the backward movement side when viewed from the rotating direction of the rotor of the actuator.

These recesses or blind holes (hereinafter referred to as recesses) improve the adhesion of the medium film on the upper side of the actuator when the actuator is contracted into the slot, so that one actuator blade is rotary. When W again emerges from the slot of the piston mechanism, static frictional forces are greatly reduced and free reciprocating movement of the actuator occurs substantially against fluid friction, so that no fluidic short circuits occur.

Such recesses may be provided along the tops of the two sides of the actuator in order to adapt it to a rotary engine that is used in either direction of rotation and to avoid adding the actuator incorrectly during assembly. can.

Furthermore, excessive wear can also be prevented by providing these recesses in a radial direction from the upper end along the upper side of the actuator over approximately 1/2 to 1/3 of the cycle 0 to 1/3 of the actuator.

These recesses provided in the upper side of the actuator preferably have a depth of 1 to 4 microns and a diameter of 10 to 20 microns, and their number is preferably 300 to 500 per square millimeter.

The recesses can be formed, for example, by chemical methods such as etching or mechanical methods such as eroding, smembling, hammering, poling, etc.

However, after forming in one such processing step,
The sides of the actuator are further machined to reduce wear.

The secondary processing for this purpose can be carried out, for example, by using an oil stone to smooth the entire side surface of the actuator on which the recess is provided.

An embodiment of this invention will be described above with reference to the drawings.

As shown in FIG. :5Z2 is equipped with a cylindrical housing 1 which is rotatably added inside.

Between the housing 1 and the rotor 2 and 0 there is an inner wall 575 of the housing 1: a contact point 4 which is in full contact with the outer circumference of the rotor 2, e.g.
A number of crescent-shaped working chambers are defined.

The rotor 2 is formed with a number of radially extending slots 6 each accommodating a radially movable actuator 7.

The outer end of this actuator 7 is pressed against the inner wall 5 of the housing 1 by a biasing member, for example a spring 8, which is arranged at the bottom of the slot 6 and presses against the bottom surface of the actuator 7.

A large number of curved long groove-shaped communication openings 9.9', 9'' and 11°ii', ii'' are formed on the side surface of the housing 1, and the former three are connected to the hydraulic pressure supply source 10. The latter three are each in communication with the reservoir 12.

The actuating tool 7 extending into the working chamber 3 and in contact with the inner wall 5 has openings 11, 11'.

11" to separate the part of the working chamber 3 connected to the reservoir 12 through the opening 9.9', the other part connected to the hydraulic pressure source 10 through the opening 9". It is provided.

Since the pressures acting on the actuator 7 are different, a driving torque that rotates the rotor 2 clockwise as shown by arrow A is generated.

The inner wall of the housing 1 is substantially equilaterally triangular, and the equilateral triangular inner wall is provided with an outwardly curved arcuate corner with an apex 5.

Further, the inner wall of the equilateral triangle has sides slightly curved outward, and a ridge point 4 is formed at the center of the curved feed.

Since the inner wall of the housing is configured as described above and the radius of curvature of the apex 5 is larger than that of the central ridge point, the repulsive force generated on the inner wall of the housing at the apex 5 is smaller than that at the central ridge point 4.

Therefore, the actuating tool 1 is slid in the radial direction within the slot so as to protrude or retract from the radial slot of the piston, and is constantly in contact with the inner wall of the housing to keep fluid flowing even though the radius of curvature of the inner wall of the housing changes. Maintaining a closed state.

The radial movement of the actuator 7 is determined by the shape of the inner wall 5 of the housing 1.

Since the central ridge point 4 has the minimum radius of curvature, that is, the distance from the common axis of the piston and the housing is the minimum, if the actuating blade 7 is in contact with the housing at the central ridge point 4, the actuating tool T will be attached to the rotor 2. is almost completely accommodated in the slot 6 of the working chamber 3, while in the middle of the working chamber 3 the actuating tool T protrudes from the slot 6 by the maximum amount.

The stroke of the actuator 7 is determined by these two limit positions.

From the point of contact 4 to the central part of the working chamber 3, the radially outward movement of the actuator 7 is effected by a spring 8, which acts primarily to overcome the frictional forces acting on the actuator 7.

If the frictional force generated is very large, the spring 8
Since it is not possible to press the actuating tool 7 to bring it into contact with the inner wall 5, a gap is created between the actuating tool 7 and the inner wall 5, so the openings 9゜9', 9'' are directly connected to the openings 11, 11', 11〃.
A short circuit is formed in communication with the engine, and such a condition acts to impede rotational movement of the engine.

In order to avoid such trouble, as shown in FIG. 2, a large number of small recesses are formed in the upper part 13a of the side surface 13 of the actuator 7 on the backward movement side with respect to the rotational direction of the rotor 2.

This recess forms a medium film between the side surface 13 of the actuator 7 and the slot surface of the rotor 2 while the actuator 7 gradually protrudes from the state accommodated in the slot 6 past the contact point 4. It is acting on

According to such a method, since the combined frictional force or static frictional force becomes small, after the operating tool 7 passes the contact point 4, it is only subjected to the reduced frictional force and a slight fluid frictional force, so that the spring 8 can sufficiently push up the actuating tool 7.

The side surface 14 of the actuator 7 is in frictional contact only while the actuator 7 is housed in the slot 6, but in other cases, the side surface 14 and the slot surface are not in frictional contact, so that the direction of rotation is There is no need for a recess to be provided on its side 14 facing .

By providing such a recess, there are clearly no problems with the contact of the actuator 7 against the inner wall 5 of the housing during the operating cycle of the actuator 7.

Since a large force directed radially inward against the pushing force of the spring 8 is automatically generated by the shape of the inner wall 5 of the housing, the contact of the actuator 7 with the inner wall 5 causes contraction of the operating cycle force of the actuator 7. It is always secured even during cycles.

If the rotary engine can be used in either direction, another side of the actuating tool T, that is, the side 14, should be formed so that a medium film is formed in both cases and prevents the generation of large static frictional forces. An additional recess may also be provided along the top.

The term recess as used herein refers to a number of holes, or indentations or depressions, etc., made in the actuator 7 as shown by chemical or mechanical methods.

These recesses are very small in size and can be formed into regular shapes if processed by drilling or smembling or other similar mechanical methods, but if processed by similar chemicals such as etching. If processed using a standard method, the shape and depth would be irregular.

The actual method used will be selected based on cost and other manufacturing methods.

Needless to say, the method of forming the recess, the shape of the component parts,
The configuration of the Romery engine is not limited to what is described in this specification and can be varied within the technical scope of the present invention.

As described above, according to this invention, a predetermined number of recesses are formed in the region adjacent to one end of the actuator remote from the slot, that is, in the upper part, at least on the backward side surface of the actuator when viewed from the rotational direction of the rotor.

Further, no recess is formed in the lower side of the actuating tool 0 so as to ensure highly reliable liquid tightness of the actuating tool.

Such a configuration controls the static frictional force and ensures zero stabilization of the medium film between the actuator and the inner wall of the housing.

If the number of recesses is at least 300/- and is above such a critical value, it will be shown that it has a critical effect on stabilizing the medium film.

[Brief explanation of drawings]

FIG. 1 shows a cross-sectional view of the rotary piston engine, and FIG. 2 shows a perspective view of the actuator used.

Claims (1)

[Scope of utility model registration request] The rotor has a large number of actuating tools respectively disposed in a plurality of radial slots formed in the rotor, and the actuating tool has a large number of recesses at least on a side surface on the reverse side when viewed from the rotational direction of the rotor. In a low-speed rotary engine with sliding engagement between the housing and the inner wall of the housing, the recess is a blind hole formed in the upper side of the actuator, and the number of recesses is at least υ. A Romery engine characterized by 300 pieces/wit.