Cantilever beam type sealing system structure of elliptical piston rotor machine

Abstract

The invention relates to the field of rotor engines, and discloses an elliptical piston rotor machine cantilever beam type sealing system structure which comprises a rotor machine cylinder body, an elliptical rotor is installed in the rotor machine cylinder body, and three cantilever parts are evenly arranged on the inner wall of the rotor machine cylinder body. Oil nozzles are fixedly embedded in the positions, corresponding to the three cantilever parts, of the side wall of the rotor machine cylinder body, a center groove is formed in the middle of each cantilever part, cantilever grooves are formed in the two sides of the inner wall of each center groove, roller grooves are formed in the two sides of the middle of each cantilever part, and hollow rollers are installed on the inner walls of the roller grooves; a cylindrical pin is installed on the inner wall of the hollow rolling shaft, and an end face sealing ring is installed on the front side of the rotor machine cylinder body. In the invention, the direct friction between the top end of the sealing device and the rotor is changed into rolling friction, so that the friction resistance is greatly reduced, the abrasion of the sealing device is improved, and the air leakage phenomenon is avoided.

Description

Technical Field

[0001] The present invention relates to the field of rotary engines, and in particular to a cantilever beam sealing system structure of an elliptical piston rotary engine. Background Art

[0002] The elliptical piston rotor engine is a rotary internal combustion engine with the advantages of compact structure, low noise, high power-to-weight ratio, high thermal efficiency and high reliability. Therefore, as a small power source, the elliptical piston rotor engine has broad application prospects in automobile range extenders, small generators, and drones.

[0003] Traditional elliptical piston rotor engines lubricate the rotor and cylinder by directly injecting lubricating oil into the combustion chamber. This lubrication method has poor lubrication effect and is difficult to accurately and evenly deliver lubricating oil to all parts that need lubrication. This may cause wear of the cylinder or rotor, and the oil consumption is high. It may also cause unburned or partially burned oil to be discharged into the environment, increasing the pollutants in the emissions. The traditional elliptical piston rotor engine usually adopts a removable integral radial sealing plate, which is installed in the groove of the cylinder body. The spring provides support at the bottom to make the sealing plate in close contact with the rotor, thereby playing a sealing role. There is a gap between the sealing plate and the groove of this sealing method, which will cause gas movement or even leakage in adjacent combustion chambers. At the same time, due to the pulsation of gas at the top and bottom of the sealing plate, the radial force of the radial sealing plate will also change significantly, resulting in gas leakage in adjacent combustion chambers, and may even cause the radial sealing plate to pulsate on the cylinder surface, resulting in vibration. The vibration phenomenon will cause rotor vibration marks at the sealing plate, aggravate the wear of the sealing plate, and greatly endanger the power and life of the engine. At the same time, the radial sealing plates of existing rotary engines are not easy to disassemble and assemble, which increases the difficulty and cost of maintenance. In addition, the sealing plate is in direct contact with the cylinder body, and the wear between the two is serious.

[0004] Taking the above situation into consideration, a cantilever beam sealing system structure of an elliptical piston rotor machine is proposed to solve the above problems. Summary of the Invention

[0005] In order to make up for the above shortcomings, the present invention provides a cantilever beam sealing system structure of an elliptical piston rotor machine, which aims to improve the poor lubrication effect of traditional elliptical piston rotor machines, making it difficult to accurately and evenly deliver lubricating oil to various parts that need lubrication, which may cause wear of the cylinder body or rotor, and the traditional elliptical piston rotor machine. The adjacent combustion chambers are prone to gas leakage, and may even cause the radial sealing plate to pulsate on the cylinder surface, resulting in vibration.

[0006] In order to achieve the above-mentioned objectives, the present invention adopts the following technical solutions: an elliptical piston rotor machine cantilever beam sealing system structure, comprising a rotor cylinder body, an elliptical rotor installed inside the rotor cylinder body, three cantilever parts evenly arranged on the inner wall of the rotor cylinder body, and fuel injectors fixedly embedded in the side walls of the rotor cylinder body corresponding to the three cantilever parts, a central groove is provided in the middle of the cantilever part, cantilever grooves are provided on both sides of the inner wall of the central groove, roller grooves are provided on both sides of the middle of the cantilever part, a hollow roller is installed on the inner wall of the roller groove, a cylindrical pin is installed on the inner wall of the hollow roller, two fuel injection channels are provided inside the cantilever part at one end of the fuel injector, and an end face sealing ring is installed on the front side of the rotor cylinder body.

[0007] As a further description of the above technical solution: One end of the two cantilever grooves is provided with a cantilever baffle.

[0008] As a further description of the above technical solution: A sealing sleeve groove is provided on the front side of the elliptical rotor.

[0009] As a further description of the above technical solution: An end face sealing sleeve is installed on the front side of the sealing sleeve groove.

[0010] As a further description of the above technical solution: An annular corrugated spring is installed inside the sealing sleeve groove.

[0011] As a further description of the above technical solution: Both ends of the two roller grooves are provided with sealing strip grooves, and the inner walls of the sealing strip grooves are installed with end face sealing strips.

[0012] As a further description of the above technical solution: One end of the two oil injection channels is communicated with the interior of the two cantilever grooves respectively.

[0013] As a further description of the above technical solution: The inner wall of the rotor cylinder is provided with a combustion chamber between each two adjacent cantilever parts.

[0014] The present invention has the following beneficial effects: 1. In the present invention, the traditional radial sealing plate of the elliptical piston rotor machine is replaced with a new cantilever radial seal, thereby simplifying the sealing structure of the rotor machine and avoiding the problems of air leakage, blowby and vibration caused by the sealing plate, thereby improving the sealing effect of the rotor machine and extending the service life of the rotor machine. In addition, the direct friction between the top of the sealing device and the rotor is replaced with rolling friction, which greatly reduces the friction resistance, improves the wear of the sealing device and avoids the occurrence of air leakage.

[0015] 2. In the present invention, the lubricating oil injection device of the traditional elliptical piston rotor machine is installed in the sealing structure, and the rotor is evenly lubricated while sealing, so that an oil film is formed between the rotor and the sealing device, thereby improving the sealing effect, and lubricating the roller and the cylindrical pin to reduce the wear of the sealing device. In addition, the lubrication method of making the lubricating oil flow out from the bottom of the cantilever can also prevent the gas from flowing into the cantilever groove, avoiding the clearance volume problem caused by the groove and the leakage and vibration problems caused by the gas pulsation at the bottom of the cantilever. The end face sealing system of the elliptical piston rotor machine is improved, sealing rings are installed at both ends of the cantilever sealing structure, and end face sealing sleeves are installed on the rotor surface to prevent the problem of blowby on the end face of the adjacent combustion chamber, thereby improving the operating performance of the engine and improving the stability of the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a three-dimensional schematic diagram of the cantilever beam sealing system structure of an elliptical piston rotor machine proposed by the present invention; Figure 2 This is a cross-sectional schematic diagram of the cantilever portion of a cantilever beam sealing system structure of an elliptical piston rotor machine proposed by the present invention; Figure 3 This is a three-dimensional schematic diagram of the cantilever portion of a cantilever beam sealing system structure of an elliptical piston rotor machine proposed by the present invention; Figure 4 This is a three-dimensional schematic diagram of the elliptical rotor of the cantilever beam sealing system structure of the elliptical piston rotor machine proposed by the present invention.

[0017] Legend: 1. Rotor cylinder; 2. Elliptical rotor; 3. Combustion chamber; 4. Fuel injector; 5. End face sealing sleeve; 6. End face sealing strip; 7. End face sealing ring; 8. Cantilever part; 9. Cantilever groove; 10. Cantilever baffle; 11. Hollow roller; 12. Center groove; 13. Fuel injection channel; 14. Cylindrical pin; 15. Annular corrugated spring; 16. Roller groove; 17. Sealing strip groove; 18. Sealing sleeve groove. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] Reference Figure 1-Figure 3 , an embodiment provided by the present invention: an elliptical piston rotor machine cantilever beam sealing system structure, including a rotor cylinder 1, an elliptical rotor 2 is installed inside the rotor cylinder 1, which is a rotary internal combustion engine and is used as a small power equipment. The inner wall of the rotor cylinder 1 is evenly provided with three cantilever parts 8, and the side wall of the rotor cylinder 1 is fixedly embedded with an oil nozzle 4 corresponding to the three cantilever parts 8 for spraying lubricating oil. A central groove 12 is provided in the middle of the cantilever part 8 to provide space for the cantilever seal to move downward and store the sprayed lubricating oil to achieve quantitative and uniform lubrication. Cantilever grooves 9 are provided on both sides of the inner wall of the central groove 12 to form a cantilever seal. The arm sealing structure is in close contact with the elliptical rotor 2 to form a sealing effect, wherein the cantilever acts as a spring to provide an upward elastic force for the radial sealing structure. Roller grooves 16 are provided on both sides of the middle of the cantilever part 8, and a hollow roller 11 is installed on the inner wall of the roller groove 16. A cylindrical pin 14 is installed on the inner wall of the hollow roller 11, which changes the sliding friction between the original rotor and the sealing structure into rolling friction, greatly reducing the friction of the sealing structure and improving the wear of the sealing structure. Two oil injection channels 13 are provided at one end of the oil injector 4 inside the cantilever part 8 for the passage of lubricating oil, and an end face sealing ring 7 is installed on the front side of the rotor cylinder 1.

[0020] Reference Figure 2 One end of each cantilever groove 9 is provided with a cantilever baffle 10, which can prevent the gas in the cylinder from entering the bottom of the cantilever structure and affecting the volumetric efficiency of the engine.

[0021] Reference Figure 4 A sealing sleeve groove 18 is provided on the front side of the elliptical rotor 2 to provide an installation space for sealing at the elliptical rotor 2 .

[0022] Reference Figure 4 An end face sealing sleeve 5 is installed on the front side of the sealing sleeve groove 18, which can achieve sealing of the rotor end face and avoid the problem of gas blowby through the rotor end face.

[0023] Reference Figure 4 An annular corrugated spring 15 is installed inside the sealing sleeve groove 18 to achieve the assembly of the end face sealing sleeve 5.

[0024] Reference Figure 3Both ends of the two roller grooves 16 are provided with sealing strip grooves 17, and the inner wall of the sealing strip groove 17 is installed with an end face sealing strip 6, which can seal the lubricating oil at the bottom of the cantilever to prevent the end face leakage of the lubricating oil.

[0025] Reference Figure 2 One end of the two oil injection channels 13 is connected to the interior of the two cantilever grooves 9 respectively. The lubricating oil enters the bottom of the cantilever structure through the oil injection channel 13, and then flows into the central groove 12 from the gap between the cantilever baffle 10 and the central groove 12, finally achieving the effect of lubricating the rotor.

[0026] Reference Figure 1 and Figure 3 A combustion chamber 3 is provided on the inner wall of the rotor cylinder 1 between each two adjacent cantilever parts 8. When the gas in the combustion chamber 3 flows along the end surface to the other chamber, it will be cut off by the improved end surface sealing strip 6, thereby improving the working performance of the engine.

[0027] Working principle: At the traditional seal of the new elliptical piston rotor machine, a groove is opened along the offset curve of the rotor machine cylinder line 1 to form a symmetrical cantilever of the new sealing device. At the same time, a cantilever baffle 10 is set up under the two cantilevers and a corresponding cantilever groove 9 is opened to form a cantilever radial sealing structure. A roller groove 16 is set at the top of the cantilever radial sealing structure, and a hollow roller 11 and a cylindrical pin 14 are placed in the groove to improve the friction resistance of the sealing strip. Two connected oil injection channels 13 are opened under the new cantilever seal to allow the lubricating oil to flow out from the gap between the radial sealing baffles to form a lubrication structure. The face seal is composed of a cylinder end face groove and an end face sealing ring 7, and the rotor end face seal is composed of a rotor end face groove, an end face sealing sleeve 5, and an annular corrugated spring 15. The end face sealing system can effectively prevent the blowby phenomenon of the adjacent combustion chamber 3. The sealing structure does not have the radial sealing plate structure of the traditional rotor machine. Instead, after being offset inward along the cylinder body profile for a certain distance on the cylinder body, two through symmetrical grooves are opened in the lower part of the cylinder body to form two symmetrical cantilevers. At the same time, baffles are set at the bottom of the two cantilevers and corresponding grooves are opened to prevent gas from entering the bottom of the cantilever. At this time, a cantilever radial sealing structure is formed.The structure acts as a spring, so that the cylinder body at the top of the groove is in close contact with the rotor surface, producing a good sealing effect, solving the problems of vibration, blowby and air leakage of traditional sealing plates. In addition, cylindrical grooves are opened at the top of the two cantilever sealing structures, and hollow rollers 11 and cylindrical pins 14 are installed in the grooves. The length and diameter of the rollers are the same as those of the cylindrical grooves, and the diameter of the cylindrical pins 14 is the same as the diameter of the center hole of the hollow roller 11, so as to achieve a good matching effect. The materials of the cantilever structure and the cylinder body are exactly the same. The hollow rollers 11 and the cylindrical pins 14 are made of wear-resistant, high mechanical strength and hardness materials. At the same time, two connected oil injection channels 13 are opened at the bottom of the groove of the cantilever sealing structure, so that the lubricating oil is sprayed into the bottom of the cantilever through the two oil injection channels 13, and then flows out from the gap between the baffle and the groove to achieve uniform lubrication of the rotor, and at the same time lubricate the rollers to reduce the friction resistance between the rotor and the cylinder body. In addition, in terms of cylinder end face sealing, the sealing structure is along the cylinder body. The curved groove is opened after the profile line is offset outward, and grooves of the same depth and width are also opened on both sides of the cantilever radial sealing device, and are connected to the above-mentioned grooves. Finally, a sealing ring with the same shape and size as the groove is installed on the groove to prevent the blowby of the adjacent combustion chamber 3. The sealing strip is made of wear-resistant and low thermal expansion material. In terms of rotor end face sealing, the inner and outer sides of the rotor surface are cut along the inner and outer profile lines of the rotor. At the same time, a groove is set on the rotor surface along the center profile line of the rotor, and a corrugated spring is placed in the groove. Then the rotor end face sealing sleeve 5 is installed, wherein the shape and width of the corrugated spring are exactly the same as the groove, and the height is less than the depth of the groove. The surface of the rotor end face sealing sleeve 5 is exactly the same as the shape and size of the rotor surface, and retaining rings are set at both ends and the middle of the sealing sleeve along the profile line to realize assembly with the rotor. The thickness of the retaining rings at both ends of the sealing sleeve is the same as the inner and outer cutting depth of the rotor, and the shape and width of the retaining ring in the middle of the sleeve are the same as the groove in the middle of the rotor. The rotor end face sealing sleeve 5 is made of wear-resistant and high mechanical strength material.

[0028] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A cantilever beam sealing system structure for an elliptical piston rotor machine, comprising a rotor machine cylinder (1), characterized in that: An elliptical rotor (2) is installed inside the rotor cylinder (1), three cantilever parts (8) are evenly arranged on the inner wall of the rotor cylinder (1), and fuel nozzles (4) are fixedly embedded in the side walls of the rotor cylinder (1) corresponding to the three cantilever parts (8). A central groove (12) is provided in the middle of the cantilever part (8), and cantilever grooves (9) are provided on both sides of the inner wall of the central groove (12). Roller grooves (16) are provided on both sides of the middle of the cantilever part (8), and a hollow roller (11) is installed on the inner wall of the roller groove (16). A cylindrical pin (14) is installed on the inner wall of the hollow roller (11). Two fuel injection channels (13) are provided inside the cantilever part (8) at one end of the fuel nozzle (4), and an end face sealing ring (7) is installed on the front side of the rotor cylinder (1).

2. The cantilever beam sealing system structure of an elliptical piston rotor machine according to claim 1, characterized in that: One end of each of the two cantilever grooves (9) is provided with a cantilever baffle (10).

3. The cantilever beam sealing system structure of an elliptical piston rotor machine according to claim 1, characterized in that: A sealing sleeve groove (18) is provided on the front side of the elliptical rotor (2).

4. The cantilever beam sealing system structure of an elliptical piston rotor machine according to claim 3, characterized in that: An end face sealing sleeve (5) is installed on the front side of the sealing sleeve groove (18).

5. The cantilever beam sealing system structure of an elliptical piston rotor machine according to claim 4, characterized in that: An annular corrugated spring (15) is installed inside the sealing sleeve groove (18).

6. The cantilever beam sealing system structure of an elliptical piston rotor machine according to claim 1, characterized in that: Both ends of the two roller grooves (16) are provided with sealing strip grooves (17), and the inner walls of the sealing strip grooves (17) are provided with end face sealing strips (6).

7. The cantilever beam sealing system structure of an elliptical piston rotor machine according to claim 1, characterized in that: One end of the two oil injection channels (13) is communicated with the interior of the two cantilever grooves (9) respectively.

8. The cantilever beam sealing system structure of an elliptical piston rotor machine according to claim 1, characterized in that: A combustion chamber (3) is provided on the inner wall of the rotor cylinder (1) between each two adjacent cantilever portions (8).

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