A rotor engine sleeve cylinder

Abstract

This utility model discloses a rotary engine cylinder block with a sleeve, comprising a rotary engine cylinder block and a wear-resistant cast iron cylinder liner. The rotary engine cylinder block has a circular mounting hole; the wear-resistant cast iron cylinder liner is detachably press-fitted into the mounting hole, and the wear-resistant cast iron cylinder liner has a cylinder bore with an inner surface shaped like the number "8". This utility model, through the detachable press-fit method of interference fit between the rotary engine cylinder block and the wear-resistant cast iron cylinder liner, not only ensures structural stability and prevents vibration displacement, but also enhances heat conduction through tight metal bonding, allowing heat from the cylinder liner to be quickly transferred to the cylinder block, thus comprehensively optimizing the basic performance of the cylinder block.

Description

Technical Field

[0001] This utility model relates to a sleeved cylinder block for a rotary engine, belonging to the field of rotary engine technology. Background Technology

[0002] The triangular rotor engine is a four-stroke engine with a piston based on the Reuleaux triangle and a figure-eight shaped cylinder. It features high power density and smooth operation, and plays a very important role in passenger cars, military industry, aviation, and new energy fields.

[0003] When a rotary engine is running, the three top edges of the triangular rotor rub against each other through the sealing plate and the inner wall of the cylinder. Under the alternating effects of hot and cold loads and impact vibrations, the inner wall of the cylinder is prone to premature wear. Therefore, the friction surfaces between the cylinder and the triangular rotor are required to have high wear resistance, high strength, and high thermal conductivity.

[0004] Cast iron cylinder blocks have good wear resistance and mature coating technology, resulting in low manufacturing costs. However, their high steel density makes them unsuitable for applications like aerospace where lightweighting is crucial. Aluminum alloy cylinder blocks are not wear-resistant and require a wear-resistant coating on the inner wall to meet usage requirements. Currently, common processes include electroplating nickel-based silicon carbide or thermal spraying of other wear-resistant materials, but these processes are complex and costly, making them difficult to promote in civilian applications. Therefore, a rotary engine sleeved cylinder block was proposed. Utility Model Content

[0005] To address the aforementioned technical shortcomings, the purpose of this utility model is to provide a rotary engine sleeved cylinder block that not only ensures structural stability and prevents vibration displacement, but also enhances heat conduction through tight metal bonding, allowing heat from the cylinder liner to be quickly transferred to the cylinder block, thus comprehensively optimizing the basic performance of the cylinder block.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The present invention provides a rotary engine sleeved cylinder block, comprising: A rotary engine cylinder block, wherein a circular mounting hole is provided on the rotary engine cylinder block; Wear-resistant cast iron cylinder liner, wherein the wear-resistant cast iron cylinder liner is detachably press-fitted into the mounting hole, and the wear-resistant cast iron cylinder liner has a cylinder hole with an inner surface shaped like the number "8".

[0007] Preferably, the outer surface of the wear-resistant cast iron cylinder liner is adapted to the shape of the mounting hole; The outer surface of the wear-resistant cast iron cylinder liner is configured to be interference-fitted with the mounting hole.

[0008] Preferably, the wear-resistant cast iron cylinder liner has weight-reducing holes on its sidewall.

[0009] Preferably, the size of the weight-reducing hole is determined according to the wall thickness of the wear-resistant cast iron cylinder liner. Larger weight-reducing holes are made in areas with thicker walls, and smaller weight-reducing holes are made in areas with thinner walls.

[0010] Preferably, the rotor engine cylinder block has multiple heat dissipation fins distributed along the mounting holes.

[0011] Preferably, a cooling channel is provided between two adjacent heat dissipation fins, and the cooling channel extends toward the rotor engine cylinder block.

[0012] Preferably, a first exhaust port and a first intake port are provided on the side wall of the rotary engine cylinder block; The wear-resistant cast iron cylinder liner has a second exhaust port and a second intake port on its side wall; When the wear-resistant cast iron cylinder liner is pressed into the rotary engine cylinder, the second exhaust port is aligned with the first exhaust port, and the second intake port is aligned with the first intake port.

[0013] Preferably, both the first exhaust port and the first air inlet port are provided with connecting flanges.

[0014] Preferably, the rotor engine cylinder block has multiple mounting holes arranged at intervals along the mounting holes.

[0015] Preferably, the rotary engine cylinder block is made of aluminum alloy, and the wear-resistant cast iron cylinder liner is made of cast iron.

[0016] Compared with existing technologies: 1. This utility model uses a detachable press-fit method with an interference fit between the rotary engine cylinder block and the wear-resistant cast iron cylinder liner. This not only ensures structural stability and prevents vibration displacement, but also enhances heat conduction through tight metal bonding, allowing the heat from the cylinder liner to be quickly transferred to the cylinder block, thus comprehensively optimizing the basic performance of the cylinder block.

[0017] 2. This utility model achieves a dual optimization effect by opening weight-reduction holes in the sidewall of the wear-resistant cast iron cylinder liner. Based on the cylinder liner wall thickness distribution characteristics, weight-reduction holes of corresponding sizes are opened in different wall thickness areas. On the one hand, redundant material is removed to reduce the weight of the cylinder liner, thereby reducing the inertial load during engine operation; on the other hand, the structural strength of each part of the cylinder liner is balanced, so that the deformation trend of the inner and outer surfaces is consistent under heat and stress, avoiding loosening of the fit caused by local stress concentration, improving the reliability of the connection with the aluminum cylinder block, ensuring that good sealing and heat transfer efficiency are maintained even after long-term operation, and further improving the working stability of the cylinder liner. 3. This utility model increases the contact area with air through heat dissipation fins, accelerating convection heat dissipation. The cooling channels between adjacent fins are extended and opened, and the internal heat is carried away by gas flow. The two work together to control the cylinder working temperature within a reasonable range. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a front view of the rotary engine cylinder block and wear-resistant cast iron cylinder assembly of this utility model in their assembly state; Figure 3 This is an exploded view of the rotary engine cylinder block and wear-resistant cast iron cylinder liner of this utility model. Figure 4 This is a front view of the rotary engine cylinder block of this utility model; Figure 5 This is a front view of the wear-resistant cast iron cylinder liner of this utility model; Figure 6 This is a structural schematic diagram from another perspective of the present invention.

[0019] In the picture: 1. Rotary engine cylinder block; 101. Mounting hole; 102. Assembly hole; 103. Cooling channel; 104. Heat dissipation fins; 105. First exhaust port; 106. First air inlet port; 107. Connecting flange. 2. Wear-resistant cast iron cylinder liner; 201. Cylinder bore; 202. Weight reduction hole; 203. Second exhaust hole; 204. Second intake hole. Detailed Implementation

[0020] The present invention is illustrated below with specific embodiments, but these are not intended to limit the scope of the invention.

[0021] Example 1 like Figures 1-6 As shown, in this embodiment, a rotary engine cylinder block with a sleeve is provided, including a rotary engine cylinder block 1 and a wear-resistant cast iron cylinder liner 2: The rotary engine cylinder block 1 is made of aluminum alloy, and the wear-resistant cast iron cylinder liner 2 is made of cast iron. The rotary engine cylinder block 1 takes advantage of its light weight and good thermal conductivity to reduce the overall weight of the engine and improve heat dissipation efficiency. Circular mounting holes 101 are opened on it as the assembly base. Multiple assembly holes 102 are arranged at intervals along the mounting holes 101. These assembly holes 102 are used to connect with the cylinder head. Because they are evenly distributed in a ring, they can form a uniform clamping force when the cylinder head is installed, avoid local sealing failure, and significantly improve the sealing performance of the cylinder block and cylinder head mating surface.

[0022] The inner wall of the wear-resistant cast iron cylinder liner 2 is machined with an "8"-shaped cylinder bore 201. This shape perfectly matches the rotor's motion trajectory, meeting the working stroke requirements of the rotary engine. The wear-resistant cast iron cylinder liner 2 is assembled into the mounting hole 101 by a detachable press-fit method. Its outer surface is designed to be circular to fit the mounting hole 101, and the two adopt an interference fit. This ensures the structural stability after assembly, prevents relative displacement due to vibration during operation, and improves heat conduction efficiency through the tight fit between the metals, allowing the heat generated by the wear-resistant cast iron cylinder liner 2 to be quickly transferred to the cylinder block. Example 2 like Figures 1-6 As shown, based on Embodiment 1, this embodiment optimizes the structure of the wear-resistant cast iron cylinder liner 2 to further improve its operational stability. Specific improvements are as follows: The wear-resistant cast iron cylinder liner 2 has a weight reduction hole 202 on its side wall. This design is based on the cylinder liner wall thickness distribution characteristics: due to the structural characteristics of the "8" shaped cylinder bore 201, the wall thickness of different parts of the cylinder liner is different. A larger weight reduction hole 202 is opened in the thicker part of the wall, and a smaller weight reduction hole 202 is opened in the thinner part of the wall. The dual function of this structure is: on the one hand, by removing redundant materials, the weight of the cylinder liner is reduced, thereby reducing the inertial load during engine operation; on the other hand, by balancing the structural strength of each part of the cylinder liner, the deformation trends of the inner surface (in contact with the rotor) and the outer surface (in contact with the cylinder block) are kept consistent under heat and stress, avoiding loosening of the fit due to local stress concentration, thereby improving the reliability of the connection with the aluminum cylinder block and ensuring that good sealing and heat transfer efficiency can still be maintained after long-term operation. Example 3 like Figures 1-6 As shown, this embodiment, based on embodiment two, adds a heat dissipation and intake / exhaust structure, enabling the cylinder block to have complete working capabilities: Heat dissipation structure: Multiple heat dissipation fins 104 are distributed along the mounting hole 101 of the rotary engine cylinder 1. The fins adopt a wave-shaped design to increase the contact area with air and accelerate the convective heat dissipation of the cylinder surface. At the same time, a cooling channel 103 is provided between two adjacent heat dissipation fins 104. The cooling channel 103 extends towards the rotary engine cylinder 1. The flow of gas in the cooling channel 103 carries away the heat inside the cylinder and forms a synergistic heat dissipation with the heat dissipation fins 104 to control the cylinder operating temperature within a reasonable range. Intake and exhaust structure: A first exhaust port 105 and a first intake port 106 are provided on the side wall of the rotary engine cylinder block 1, and a second exhaust port 203 and a second intake port 204 are correspondingly provided on the side wall of the wear-resistant cast iron cylinder liner 2. When the cylinder liner is pressed into the cylinder block, the two sets of holes are aligned to ensure unobstructed intake and exhaust passages. In addition, both the first exhaust port 105 and the first intake port 106 are provided with connecting flanges 107. The flanges adopt a sealing groove design, and the connection sealing with the intake and exhaust pipes is enhanced by adding rubber sealing rings to reduce gas leakage loss.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate and not limit the technical solutions of this utility model. Although this utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to this utility model without departing from the spirit and scope of this utility model. Any modifications or partial substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A rotary engine sleeved cylinder block, characterized in that, include: Rotary engine cylinder (1), on which a circular mounting hole (101) is provided. Wear-resistant cast iron cylinder liner (2), the wear-resistant cast iron cylinder liner (2) is detachably pressed into the mounting hole (101), and the wear-resistant cast iron cylinder liner (2) has a cylinder hole (201) with an inner surface in the shape of "8".

2. The rotary engine sleeved cylinder block according to claim 1, characterized in that, The outer surface of the wear-resistant cast iron cylinder liner (2) is adapted to the shape of the mounting hole (101); The outer surface of the wear-resistant cast iron cylinder liner (2) is configured to be interference-fitted with the mounting hole (101).

3. A rotary engine sleeved cylinder block according to claim 2, characterized in that, The wear-resistant cast iron cylinder liner (2) has a weight reduction hole (202) on its side wall.

4. A rotary engine sleeved cylinder block according to claim 3, characterized in that, The size of the weight reduction hole (202) is determined according to the wall thickness of the wear-resistant cast iron cylinder liner (2). The part with thicker wall thickness has a larger weight reduction hole (202), and the part with thinner wall thickness has a smaller weight reduction hole (202).

5. A rotary engine sleeved cylinder block according to claim 1, characterized in that, The rotor engine cylinder (1) has multiple heat dissipation fins (104) distributed along the mounting hole (101).

6. A rotary engine sleeved cylinder block according to claim 5, characterized in that, A cooling channel (103) is provided between two adjacent heat dissipation fins (104), and the cooling channel (103) extends toward the rotor engine cylinder (1).

7. A rotary engine sleeved cylinder block according to claim 1, characterized in that, The first exhaust port (105) and the first intake port (106) are provided on the side wall of the rotary engine cylinder (1). The wear-resistant cast iron cylinder liner (2) has a second exhaust port (203) and a second intake port (204) on its side wall. When the wear-resistant cast iron cylinder liner (2) is pressed into the cylinder block (1) of the rotary engine, the second exhaust port (203) is aligned with the first exhaust port (105) and the second intake port (204) is aligned with the first intake port (106).

8. A rotary engine sleeved cylinder block according to claim 7, characterized in that, Both the first exhaust port (105) and the first air inlet port (106) are provided with connecting flanges (107).

9. A rotary engine sleeved cylinder block according to claim 1, characterized in that, The rotor engine cylinder block (1) has multiple mounting holes (102) spaced apart along the mounting holes (101).

10. A rotary engine sleeved cylinder block according to claim 1, characterized in that, The rotary engine cylinder block (1) is made of aluminum alloy, and the wear-resistant cast iron cylinder liner (2) is made of cast iron.

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