JPS6085201A - Rotor of rotary piston engine - Google Patents

Abstract

PURPOSE:To enable to avoid carbon lock by subjecting tar comprising a mixture of oil with high boiling point and carbon to seizure on the flank face of a rotor and by forming a coating layer which has an affinity with stuck deposit. CONSTITUTION:A flank face 21 is formed by applying tar to a flank face 4a and a combustion concave portion 4b of a rotor 4 and subjecting them to seizure. This tar comprises 97 weight percent of organic part and the rest of inorganic part. And tar whose kinematic viscosity at 100 deg.C is 600 to 800cSt is used. Tar with high viscosity which is heated previously to about 100 deg.C is applied to a flank face 4a, and it is subjected to firing in an electric furnace with the range of 200 to 300 deg.C, thereby a fired tar layer is formed. This flank face on which the tar layer is formed has an affinity with stuck deposit. And this deposit hardly breaks away, thus, carbon lock of a rotor at the time of engine starting can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a rotor engine, and more particularly to a method for preventing the rotor from locking when starting the engine.

(Conventional technology publication: ") On the other hand, the rotary piston ennon, for example,
2 2 As disclosed in '7507, the interior of the casing, which is formed by a rotor housing with a polygonal inner circumferential surface on the right side and sight holes disposed on both sides of the rotor housing, is The rotor is supported by an eccentric shaft and undergoes planetary rotation, and as the rotor rotates, it moves inside the casing. Each step is performed sequentially.

FIG. 1 shows a schematic structure of a rotary piston engine. The casing is formed by a rotor housing 2 having a multi-arc inner circumferential surface 2a and IJoid housings 3, 3 disposed on both sides of the rotor housing 2. The rotor 4 is supported by an eccentric shaft 5 within the casing and rotates planetarily.

On the flank surface 4a of the rotor 1, in order to improve combustibility, a groove is provided. In the low-pressure piston encoder, the inside of the casing 1 is

0, and the apex seal □ is attached to each top of rotor 1.

Each process of compression, explosion, expansion, and extraction is 1l111th order a)'
In addition, in Fig. 1, 8 is the rotor, and λ is mounted on the side of
'N side seals, 9 are hooker seals attached to both sides of each top of the rotor 4, 1-0.11 are leading side spark plugs and trailing side spark plugs, respectively; 13
14 is an intake port connected to an intake passage (not shown), and an exhaust boat 14 is connected to a return air passage (not shown).

By the way, in such a low-repetition piston engine, during engine operation, carbon contained in the combustion gas in the working chamber G lands on the rotor 4, especially on the flank surface 4a, and after the engine is stopped, Also, the carbon that has arrived on the inner peripheral surface of the rotor housing 2 and the inner wall surface of the side housing 3 will be removed by the apex seal 7, side seal 8, etc. installed on the rotor 4. Since it will be scraped off, it will not remain as 471st place.

When the engine operation is stopped, especially when the engine is stopped for a long period of time, the working chamber 6 is in communication with the atmosphere (outside air) through the intake passage and the exhaust passage, so the change in the state of the outside air ( Due to changes in temperature and humidity, the above substances (hereinafter referred to as depot knots) deposited in the rotano [=ll'i L] absorb moisture in the fire, dissipate it, and expand and contract repeatedly, resulting in a change in temperature and humidity. 4) to the working chamber 6)
This will fall.

Therefore, when the engine is subsequently started, the rotation of the rotor 1 is inhibited by the deposit 1 that has fallen into the working chamber 6, and the rotor 1 is rotated slightly from the second dead center. The small gap formed between the trailing side end of the flank surface 4a and the inner peripheral surface of the rotor flank surface 2 is filled with deposits scraped and collected by the rotor 4, locking the rotation of the rotor 4. There is a possibility that the engine will not start properly.

(Object of the Invention) Therefore, an object of the present invention is to eliminate the peeling of deposits attached to the rotor when the engine is stopped, without affecting the engine performance, in a rotary revving engine, and to eliminate the peeling off of the deposit attached to the rotor when the engine is started. The objective is to prevent the rotor from locking at lUj and improve starting performance.

For this reason, I received a deposit F1 letter? By studying the cod υ needle myself, I was able to obtain the following knowledge. In general, in a low-repetition piston engine, due to its combustion structure, there is a temperature distribution on the flank surface of the rotor that is high on the leading side (L) and gradually decreases toward the trailing side (T). ) The type and composition of the substance that withers the material changes in response to changes in the surface temperature of the flank surface described in 1.

In this case, leading +1111, which has the highest temperature on the rotor flank surface, has a whitish-brown solid (liquid type depot knot or 471).This undefeated type depot knot is CaS○
, ++ ZnS C) (I S Ox, Guess 1.) Y juniper etc. 1) Strong bonding with the rotor flank surface,
Does not peel off easily.

Further, the middle part of the rotor flank surface, that is, the part including the four combustion parts, has no t'9 as it goes from the leading side to the trailing side. There is a mixed zone in which system deposits gradually decrease and organic deposits gradually increase. The color state changes from brown to dark brown accordingly.

Organic depot knots consist of oil, tarred oil, burned carbon, and are black in color. 471 when the surface temperature of the rotor is relatively low. (;!' If the situation is wet due to residual oil,
Contains tarry oil (lenone) and has a glossy surface.

A mixture of this undefeated type debonot and Ariiso type debono is easy to use, whether it is a brown one with a high inorganic content or a blackish brown one with a high oil content. This is due to the fact that the adhesion deposit in the mixture (particularly the highly hygroscopic SO2 component) absorbs moisture in the air and swells into a 1゛11 shape, which causes it to lose its adhesion to the flank surface and peel off. !411 It is thought that deponents recovered from the rotary piston ennon used in Tensai are about 80% quality and about 20% non-quality, excluding water. It consists of

Further, on the ruling side of the rotor flank surface, which is the 1 degree Celsius temperature area, a black organic Debono Z1h.1.1 coating is applied.

This organic deposit does not produce ♀11g11 compared to a mixed deposit of an undefeated system and an organic system.

This is thought to be because the oil contained in the Depont remains as it is and gets wet, or the oil turns into tar and ranks 471.

FIG. 3 schematically shows an example of a debo knot (=1) and peeling, and shows the flank surface of a conventional rotor after the high humidity atmosphere test described below was repeated six times.

In Figure 3, the empty space in the upper left corner is filled with intake air, so the devo knot does not arrive (11).

The outer blank area indicates that Deponsoto has not peeled off.
It consists mostly of inorganic deponents. The black part on the left is organic Devon/T and has not peeled off. On the other hand, the stippled area is Deponone I, a dark brown mixture mixed with some inorganic components, and peeling has occurred.The ratio of the peeled area is a little less than 1/2.

By the way, some of the above-mentioned organic debonot oils that are difficult to peel off include glossy black ones, and oils not mentioned here) - From the results of King Test 1, the surface temperature of debonot oils can reach a maximum of 20 t. '1-22 f) 'It is thought to be generated in C. This part consists of lesonous, tarry oil.

(Structure of the Invention) The present invention has been made by paying attention to the above-mentioned findings, and includes a rotor engine having a multi-arc inner peripheral surface and a site housing/engine disposed on both sides of the rotor engine. In a rotary engine, a polygonal rotor (supported by a T+M shaft and driven by planetary rotation motion) is formed inside a casing formed by a rotor.
Burning tar consisting of 1-1 compound [The dimensions are 'f &
form a veil.

(Effect of the invention) The flank surface of the rotor coated with fired tar has an affinity for deposits deposited on the surface (1), and Deponon F hardly peels off. !True with Jj-+l-.

(Embodiment) As shown in FIG. 2, the 7-rank surface 4a (combustion recess 41) of the rotor 1 is covered with tar and mackerel.

Surface 21 is a flank surface coated with tar and burnt.

The tar used in this example contained 97,111 t% of active ingredients (60 to 70 L% of high-boiling 5-χ oil and 40 to 30 L% of high-boiling 5-χ oil and
mixture with u+t% carbon) and the remaining inorganic content (Sin2
・The kinematic viscosity ν(]OO'C) at ID t)'C is 700 cSt. The value of kinematic viscosity is important for the following reasons. ν (+00°C) or 600
Tars with cSt or less are less likely to cause calcination 11 and tokoko pinch, and conversely, when ν(100'c) is 8(10cs
Tar that is more than j is difficult to apply. Therefore, the tar used in the present invention is ν (100°C) or G OO-8
(It is preferable that it be within the range of l 0cSt.

The 7-rank surface is preprocessed as follows. If the flank surface is galvanized, remove the galvanizing by blasting.

This is because coated zinc has a low affinity for tar and deposits. - If the flanks are not galvanized or galvanized, simply wipe them with a lymer.

Next, apply the above-mentioned high viscosity tar preheated to about 1 (1'C) onto the flank surface 1 of the rotor using a brush, spray, etc. The thickness of the tar should be 2 () ~ 50μ
(Preferably within the range of 1°.Finally, the applied tar is heated in a CIJ or an oven for 2 minutes at 25 fl'C.The firing temperature is , preferably within the range of 200 to 3 (1+1'C).

20 (At temperatures below 1'C, a large amount of oil remains and the viscosity decreases, so it will be washed out by gasoline.

On the other hand, at temperatures above 300°C, the oil oxidizes, the oil content decreases, and it forms a bond with the rotor (force is 1"). Also, the firing time is 10 = 6 +, + min. 1 internal strength, sushi. If it is less than 10 minutes, the firing is incomplete. On the other hand, if it is more than 60 minutes, the firing temperature is:; 00"C
The same problem as J Isuke's below-1- arises.

Applying and firing the tar can be done using the following method.

2 +1 +1-
3+) t) Brush the high viscosity tar listed in - on the 7-rank surface of the rotor, which was placed in a warm place between 1 swamp and C.

Apply the tar with a spray or the like (1), then place the varus rotor in an electric furnace or oven and burn the tar. The thickness of the fired tar layer is thicker in this method than in the first method.

The effectiveness of tar baking according to the above procedure was tested using the following method. The following four types of rotors were used. Rotor (A) with conventional zinc coating.

l Rotor with zinc coating removed using Shot Plus 1 (B
), the thickness of the fired tar layer is 3 to 5 μ [11], the rotor (C) according to this example, the thickness of the fired tar layer is 20 to 11
Rotor (D) according to this example, which is 25 μmo. Imagine these rotors as rotor pistons.

The rotary piston ennon is then operated to create a deposit with a composition that is easy to peel off. For this reason, it is necessary to forcibly cool the ennon oil and control it at 65 to 70°C.
I) 15 minutes of high times at 0r1un and 35 Q
The operation was repeated for 6000 cycles, with one cycle consisting of 15 minutes of low rotation at Orp+l+.

In this way, the rotor with the tip F attached to it is 96
% humidity for 1 hour and then in the atmosphere for 1 hour, the weight of the peeled deposit was measured.

This high humidity atmosphere test was subsequently repeated 56 times. The results are shown in FIG. In FIG. 71, Roman letters indicate L-type rotor.

The guideline for carbon lock generation is 52p (t per weight of the debossed female shaft 11 or rotor surface), and 1/2 or more of the ratio of detachment. In figure '1, ♀
The dotted line indicates the approximate weight for 1j.

The test results are evaluated as follows. Regarding the peeling weight shown in Figure 1, conventional! 11! In the untreated rotor (A) with lead coating applied, the ♀11 separation weight exceeds the standard, and in the rotor (B) with zinc coating removed, which was tested for comparison, it approaches the standard. On the other hand, the rotor coated with tar (CL (D)) is lower than the standard.1.
), the standard value is 115.

Further, the ratio of the peeled area was a little less than 1/2 in the conventional example (A), whereas ' was a little over 115 in the present example (D). In conclusion, the rotor treated by tar (
In D), the depot knot's ♀1g1f is sufficiently smaller than the guideline for the carphone lock.

This shows that the tar that has been fired into pitch adheres well to the deposit, and the reason for this is thought to be as follows. According to the deposit analysis results, organic components such as oil, oil oxides, and calcined carbon account for approximately 80% of the total deposit. This organic component has a molecular structure similar to that of pitch, and therefore the adhesion between the pitch and the deposit is better than the adhesion between the metal (rotor) and the deposit. In addition, the coefficient of thermal expansion of the pitch is
The coefficient of thermal expansion is almost the same as that of the deposit, and it improves the properties.

Incidentally, once a certain thickness of tip F is deposited on the fired tar coating layer, the layer will not become any thicker.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of a rotary piston ennon. 1 FIG. 2 is a perspective view of the rotor of the rotary piston ennon. 1 FIG. 3 is a diagram showing the situation of deposit adhesion and peeling on the flank surface. FIG. 4 is a graph showing the results of the high humidity atmosphere test. 1...Rotary piston engine casing, 4.
...Rotor, -4a...Frank rnl, 21...
-Tarred 7 runs #+i. Patent applicant Toyo's second industry stock 1. ``Representative agent Patent attorney 2 persons mentioned above Figure 3 4b Figure 4 High: gB Heiku test number

Claims (1)

[Claims] (1) The rotor housing has a multi-arc inner circumferential surface and side haunches arranged on both sides of the rotor housing, making it the perfect choice! 1:
In a rotary vis-1 engine, in which a polygonal rotor is supported by an eccentric shaft and rotates planetarily within a casing in which a polygonal rotor is mounted, a tar consisting of a mixture of high-boiling oil and carbon is burned on the flank surface of the rotor. 1. A rotor for a rotary piston ennon, characterized in that a tar coating layer is formed.