JPS6285132A - Rotor of rotary piston engine - Google Patents

Abstract

PURPOSE:To improve the strength and the durability of seal grooves, as well as the contacting strength of the seal groove members to the rotor main body, by forming of a fiber-reinforced metal the seal groove members to be contacted to the tops of the rotor main body of an aluminum alloy. CONSTITUTION:This rotor 10 consists of a rotor main body 12 of an aluminum alloy and seal groove members 16 to contact to the positions of apex seal grooves 14 to be formed at the tops of the main body 12. A seal groove member 16 is formed of an apex seal groove 14 and a corner seal groove 18 furnished at the both sides of the seal groove 14. In this case, the seal groove members 16 are formed of a fiber-reinforced metal using a short fiber, and the short fiber is made of one of verious fibers such as aluminum fiber, SiC fiber, boron fiber, and carbon fiber, Therefore, the contacting strength of the seal groove members 16 to the rotor main body 12 can be improved as well as the proper strength of the seal grooves can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an aluminum alloy rotor for a rotary vis engine.

(Prior Art) The rotor of a rotary piston engine is generally made of cast iron, but in recent years rotors made of aluminum alloy have also begun to be proposed.

If the rotor is made of aluminum alloy, the rotor can be made lighter, resulting in improved response of the l-coater, reduced load on the eccentric shaft, etc., and various effects such as high-speed rotation and improved specific output. On the other hand, aluminum alloy rotors have higher strength and resistance to I than cast iron rotors. It has a problem that it has low oxidation property and is easily softened and flattened by heat load.

The above problem is especially caused by apex seal grooves, corner seal grooves, which are constantly in contact with the sealing member, and are repeatedly slid against the seal member.
d'3 is noticeable in various seal grooves such as the seal groove.For example, in the case of an aluminum alloy rotor for a racing car, the apex seal groove is worn during such a full operation. Otherwise, the blade may become deformed and the sealing performance may deteriorate.

For this purpose, for example, as disclosed in Japanese Patent Publication No. 56-36288, by casting a seal groove member (protector to 11) made of a wear-resistant material and having an apex seal groove formed on the top of the rotor body. Twelve proposals have been made to solve the above problem.

However, this method of joining a seal groove member made of a different material such as a wear-resistant material to a rotor body made of an aluminum alloy generally involves joining the aluminum alloy base material of the rotor body and the seal groove member made of the different material. Due to the difference in thermal expansion coefficient between the two, the bonding strength between the two may decrease due to long-term operation, and delamination may occur between the two. Of course, it was a hassle.

(Object of the Invention) In view of the above-mentioned circumstances, the object of the present invention is to provide a material having a seal groove member made of a different material joined to a resin body made of an aluminum alloy, which is superior in the seal groove portion. An object of the present invention is to provide a rotary vis-in-engine rotor which has superior strength and 1!1 corrosion resistance, and which can easily ensure the bonding strength between the seal groove member and the rotor body. .

(Conjunction of the Invention) In order to achieve the above object, a rotor according to the present invention includes a rotor body made of an aluminum alloy, and a seal groove member having a seal groove joined to a portion of the rotor body where the seal groove is to be located. The seal groove member is characterized in that it is made of fiber-reinforced metal.

(Effects of the Invention) The present invention (the rotor according to J (as described above, made of aluminum alloy 1)) is made by joining a seal groove member in which the seal groove is formed to the portion of the rotor body where the seal groove is to be located. , the seal groove member is formed of pIi fiber reinforced metal.

However, fiber-reinforced metals usually have much greater strength and excellent wear resistance than aluminum alloys. Therefore, the rotor seal groove according to the present invention has excellent strength and wear resistance.

Furthermore, since the seal groove member is made of fiber-reinforced metal, there are fibers on its surface, and this p! When the seal groove member is joined to the rotor body made of aluminum alloy, the fiber is automatically interposed between the two at the joint between the two, easily increasing the joint strength without any special consideration. can be secured.

This effect is particularly noticeable in the case of joining by fusion bonding such as cast-in.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of the rotor according to the present invention. In this embodiment, the rotor body has an apex seal groove at a position 3 inches behind the seal groove of the rotor body. It is made by joining together seal groove members in which the apex seal groove is formed.

The illustrated [21-10 is] E]-1 made of aluminum alloy? and the portion where the apex seal groove 14 formed at each top of the main body 12 is located (the joined seal groove member 16). 20 is a night seal groove, 22 is an oil seal groove, 24 is an eccentric 1-rick shirt 1~hole, and 26 is a combustion chamber.

FIG. 2 is a perspective view showing the seal groove member 16 shown in FIG. 1. This seal groove (416) is made of fiber-reinforced metal using short fibers, and a mirror apex seal H7614 is formed thereon to be joined to the rotor body portion where the apex seal groove should be located. As shown in FIG. 1, the rotor in J3 is shown in FIG. Due to the fact that there is a seal? M 81S +
Corner seal d to 18 and side seal on both ends of A16:? The end of i20 is formed.

The above-mentioned materials include alumina fiber, SiC range, ;jX
A variety of fibers can be used, such as carbon fiber, carbon fiber, etc.

Note that the corner seal grooves 18 and side seal grooves 201 of the seal groove member shown in a3 in FIG. Seal groove 18
．． It is also possible to use a seal groove member 16 in which no groove 20 is formed.

The seal groove member 16 is formed, for example, by first collecting short fibers to form a cylindrical fiber molded body 28 as shown in FIG. A fiber-reinforced metal body having a cylindrical shape (approximately the same shape as the fiber molded body shown in FIG. 4) is formed using a metal, preferably an aluminum alloy, as a matrix metal, and then this fiber-reinforced metal body is machined or cast. The shape shown in FIG. 2 or 3 is manufactured by et al.

To explain the fiber-reinforced metal body in detail, for example, ceramic short fibers are used as the fibers, aluminum alloy is used as the gold, and the aluminum alloy is used as the rotor body. 5～
10%) is dispersed in the range-strengthening metal round (mother and child, 4
A 4032-+-5%△L, □03 fiber navy blue, ψ70X
+00. It depends on whether you use r6) or not. This fiber-reinforced metal body possesses the properties of metal with excellent wear resistance and low coefficient of thermal expansion.

FIG. 15 is a diagram schematically showing the above-mentioned high-pressure casting process for producing a fiber-reinforced metal body, in which the cylindrical fiber molded body 28 shown in FIG. The aluminum alloy material 34 is loaded into the inner cavity formed by the inner cavity 32, and then the aluminum alloy material 34 is pressed with a punch 36 and cast under high pressure.

FIG. 6 shows another embodiment of the seal groove member 16.

This seal groove member 16 is made of long fibers, and the long fibers are extended along the longitudinal direction of the seal groove 14 (width direction of the rotor 10) as shown in the figure. .

Incidentally, even in this seal vortex member 16i, it is possible to form a single seal groove 18 and a straight seal groove 20 as shown in FIG. 2, if necessary.

FIG. 7 shows yet another embodiment of the seal groove member 16.

This seal groove member 16 is first made of a core part of a ladle Φ5 as shown in FIG. 28a
The long fibers are wound and arranged in the circumferential direction around the outer periphery of the core 28a to form the outer periphery 28b, thereby forming the core 28a and the outer periphery 28b as shown in FIG. 7(b). Approximately 20 cylindrical fiber compacts 28 are formed, and this pl
A fiber-reinforced metal body having a metal such as an aluminum alloy as a matrix metal is formed using the i-thread molded body 28S, and the fiber-reinforced metal body is processed by machining or casting, as shown in FIG. 7(C).
A seal groove member 16 having an apex seal groove 14 as shown in FIG.

The seal groove member shown in FIG. 6 and the seal groove member shown in FIG. 7 are basically produced in exactly the same manner as the seal groove member shown in FIG. 2, although there is a difference in the fiber molded body 28. can do. Further, the core portion 28a may be formed of short fibers.

The fibers of the outer peripheral part 28b of the fiber molded body in the seal groove member 16 shown in FIG. 28a8 is the center and the fibers in the outer peripheral part 8 [) are in the seal groove 14 as shown in FIG. The fibers are arranged at right angles 911 to each other, and the cut end of each fiber is located on the inner cylinder side surface 14a of the seal '7M.

Therefore, according to this embodiment, the force Fi from the seal member 38 is supported by a large number of fibers extending in the direction of the force, and the apex seal groove. 14 strength, 1 shochu! ? : [: ti
': T-i effect can be improved.

In addition, if the fiber molded body formed as in this example is used, there is a risk that the fiber molded body may be deformed or broken during loading (pouring and pressurizing) into the mold. I'l: Uniform fibers without any analysis ([reinforced metal body] will be broken. Also, when forming the above Apex Seal 7VS screen) there will be no defects during cutting in several areas. prevent,・
¥J item? 18 Mukou Juza U Rokoto Saru. 3. Next, the seal 14 member 16 formed as described above is attached to the rotor body 1.
2. Join the part where the apex seal groove 14 of No. 2 should be located.

This joining (any method may be used, but it is preferable to use fusion, such as casting. In the embodiment shown in Figure 1, when the rotor body is cast from an aluminum alloy, A cast-in method is adopted in which the seal groove member is provided in advance, molten aluminum alloy is poured into the mold, and the seal groove member is joined to the rotor body at the same time as the rotor body is cast.

Incidentally, when joining the seal groove member having the above aluminum alloy as a matrix to the rotor main body, it is desirable that the seal groove member be subjected to a pretreatment step 11 in which Zn substitution is performed in advance. An example of Zn substitution is as follows.

7niNfa ('t(sec>) This is because an oxide film is formed on the surface of the seal groove member when the above aluminum alloy is mixed with 71~rix metal after a very short period of time, and this oxide film (A9Jz 03)
Is the aluminum alloy directly attached to this seal groove member to make it very strong? This is because even if the seal groove member is brought into contact with aluminum alloy, this oxide film will prevent the seal groove member from fusing with the aluminum alloy base material of the rotor body, and sufficient bonding strength will not be obtained. The purpose is to perform 7n substitution, which is a pretreatment for alloy plating, to remove the oxide film and replace the surface with Zn to obtain sufficient bonding strength.

Thus, Zn has a lower melting point (Z
n: 420°C), and when the molten aluminum alloy base metal for the rotor body is poured into /υ, the low melting point zn melts immediately, and the 3. The seal groove member and the rotor body are bonded together metallurgically.

J3, this 7n substitution is not necessarily required in the case of high pressure casting instead of gravity casting.

FIG. 9 is a side view showing another embodiment of the seal groove member;
Figure 0 is a right end view of the seal groove member shown in Figure 9, Figure 11 is a sectional view taken along the line XI-XI in Figure 9, and Figure 12 is a diagram of a rotor formed by joining the seal groove members shown in Figure 9. It is a half-sectional front view. This seal groove member 16 has a center portion smaller in size than both end portions, and the shape of the seal groove member 16 can be determined as appropriate, for example, as in this embodiment.

As explained above, since the rotor according to the present invention employs a seal groove member made of fiber-reinforced metal, the seal groove has excellent strength and durability, and the fibers present on the surface of the seal groove member are bonded. Sometimes, the seal groove member and the rotor body are interposed between the seal groove member and the rotor body, and the joint strength is easily removed. This is noticeable in the case of

It should be noted that the present invention can be modified in various ways without exceeding its essential scope, and is therefore not limited to the above-mentioned embodiments.In particular, in each of the above-mentioned embodiments, fibers are used in the apex seal groove portion. 1 flt seal made of reinforced metal
Although the iRIS material is used in the rotor, the rotor according to the present invention may be formed by applying the seal groove member as described above to other seal grooves, for example, the side seal groove portions.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of a rotor according to the present invention;
2 is a perspective view showing the seal groove member in FIG. 1, FIG. 3 is a perspective view showing another embodiment of the seal groove member, and FIG. Fig. 5 is a sectional view conceptually showing a manufacturing apparatus for a fiber-reinforced metal body, Fig. 6 is a perspective view showing an embodiment of the seal groove member, and Fig. 7 is a diagram without showing other seal groove members. 7(a) is a perspective view showing the core of the fiber molded product, FIG. 7(b) is a perspective view showing the entire fiber molded product, and FIG. 7(C) is a perspective view showing the core of the fiber molded product. FIG. 8 is a plan view of the seal groove member of FIG. 7(C), FIG. 9 is a side view of another seal groove member, 10 is a right end view of the seal groove member shown in FIG. 9, FIG. 11 is a sectional view taken along the line XI-XI in FIG. 9, and FIG. 12 is a rotor formed by joining the seal groove members shown in FIG. 9. It is a half-sectional front view of 10... Rotor 12... Rotor main body 14
...Seal i 16...Seal groove member U,
+ Ma and I 3□ 8 father-in-law?

Claims (1)

[Claims] It comprises a rotor body made of aluminum alloy, and a seal groove member having the seal groove joined to a portion of the rotor body where the seal groove is to be located, and the seal groove member is formed of fiber-reinforced metal. A rotor of a rotary piston engine characterized by: