Rotor engine cylinder body embedded with composite cylinder sleeve

Abstract

The utility model discloses a rotor engine cylinder body embedded with a composite cylinder sleeve, and belongs to the technical field of rotor engines. Comprising an aluminum alloy base body, and a through hole penetrating through the front face and the rear face of the aluminum alloy base body is formed in the aluminum alloy base body; a steel cylinder sleeve is embedded in the through hole of the aluminum alloy base body, and the inner wall of the steel cylinder sleeve is 8-shaped; a wedge-shaped groove is formed in the inner wall of the through hole of the aluminum alloy base body. The shape of the outer wall of the steel cylinder sleeve is matched with that of the through hole of the aluminum alloy base body, protruding wedge-shaped columns are arranged on the outer wall of the steel cylinder sleeve, and the wedge-shaped columns are embedded into the wedge-shaped grooves in the through hole of the aluminum alloy base body in a one-to-one correspondence mode. The aluminum alloy base body and the steel cylinder sleeve are compositely nested, so that the bonding strength of the cylinder sleeve and the base body is improved; on the basis of an aluminum alloy matrix, the overall weight is reduced, and the composite material is suitable for the field with high lightweight requirements; the steel cylinder sleeve provides wear resistance, reduces cost, prolongs service life of an engine, and reduces maintenance cost.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary engines, in particular to a rotary engine cylinder body inlaid with a composite cylinder liner. Background Art

[0002] The triangular rotor engine is a four-stroke engine featuring a piston with a rotor based on the basic Reuleaux triangle profile and an "8"-shaped cylinder. It boasts high power density and smooth operation, making it a crucial engine for applications in passenger vehicles, military, aviation, and new energy. During operation, the three top edges of the triangular rotor continuously rub against the inner cylinder wall through sealing plates. This alternating cycle of hot and cold loads, as well as shock and vibration, can lead to premature wear of the inner cylinder wall. Therefore, the friction surface between the cylinder and the triangular rotor requires high wear resistance, strength, and thermal conductivity.

[0003] In the existing technology, steel cylinder bodies have good wear resistance, mature coating technology and low manufacturing cost; however, steel cylinder bodies have high density and are not suitable for fields such as aviation that have relatively high requirements for lightweight indicators; while aluminum alloy cylinder bodies are not wear-resistant and need to be plated with a wear-resistant layer on the inner wall of the cylinder body to meet the use requirements. The coating process is complex and the cost is high, making it difficult to promote in the civilian field. Utility Model Content

[0004] The utility model aims to provide a rotary engine cylinder body inlaid with a composite cylinder liner, which can reduce the cost of the cylinder body while ensuring the strength of the cylinder body.

[0005] The utility model adopts the following technical solution: a rotary engine cylinder block inlaid with a composite cylinder liner, comprising an aluminum alloy substrate, on which a through hole is opened that penetrates the front and back surfaces of the aluminum alloy substrate; a steel cylinder liner is embedded in the through hole of the aluminum alloy substrate, the inner wall of the steel cylinder liner is in the shape of an "8", and the joint surface between the steel cylinder liner and the through hole of the aluminum alloy substrate has mutually matching grooves and protrusions.

[0006] The further feature is that: the through hole of the aluminum alloy substrate is an elongated hole with two semicircular ends; a wedge-shaped groove is provided on the inner wall of the through hole of the aluminum alloy substrate, and the wedge-shaped groove extends to the front and back of the aluminum alloy substrate.

[0007] The outer wall shape of the steel cylinder sleeve matches the through hole of the aluminum alloy substrate. The outer wall of the steel cylinder sleeve is provided with protruding wedge-shaped columns, which are embedded in a one-to-one correspondence with the wedge-shaped grooves in the through hole of the aluminum alloy substrate.

[0008] The wedge-shaped grooves in the through-hole of the aluminum alloy substrate are distributed in a bilaterally symmetrical manner.

[0009] The width of the wedge-shaped column at a side away from the steel cylinder liner is greater than the width at a side close to the steel cylinder liner.

[0010] The cross section of the wedge-shaped column is an isosceles trapezoid.

[0011] The aluminum alloy substrate and the steel cylinder liner are interference fit, and the steel cylinder liner is pressed into the aluminum alloy substrate using a shrink fit process. The directions of the wedge-shaped grooves and wedge-shaped columns are parallel to the axes of the aluminum alloy substrate and the steel cylinder liner.

[0012] The aluminum alloy substrate and the steel cylinder liner are combined by adopting an inlay casting process. The processed aluminum alloy substrate is used as the substrate, and the steel cylinder liner is inlaid and cast in the aluminum alloy substrate.

[0013] The aluminum alloy matrix and the steel cylinder liner are combined by adopting an inlay casting process. The processed steel cylinder liner is used as the matrix, and the aluminum alloy matrix is ​​inlaid and cast outside the steel cylinder liner.

[0014] The inner wall of the steel cylinder sleeve is sprayed with a wear-resistant coating.

[0015] The beneficial effects of the present invention are as follows: an elongated hole is opened in the middle of an aluminum alloy substrate, a plurality of wedge-shaped grooves are opened in the hole, a steel cylinder liner is embedded in the aluminum alloy substrate, a wedge-shaped column is provided on the outer wall that matches the wedge-shaped groove, and a wear-resistant coating is sprayed on the inner wall of the cylinder liner; the present invention adopts composite nesting of an aluminum alloy substrate and a steel cylinder liner, and improves the bonding strength between the cylinder liner and the substrate through the wedge-shaped groove / column embedding, and prevents the cylinder liner from vibrating or detaching due to high temperature, vibration, etc.; based on the aluminum alloy substrate, the overall weight is reduced, and it is suitable for fields with high lightweight requirements; the steel cylinder liner provides wear resistance, reduces costs, extends engine life, and reduces maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a schematic structural diagram of a rotary engine cylinder block inlaid with a composite cylinder liner provided by an embodiment of the present invention.

[0018] Figure 2 This is a schematic structural diagram of the aluminum alloy substrate provided in an embodiment of the present utility model.

[0019] Figure 3 This is a schematic structural diagram of a steel cylinder liner provided in an embodiment of the present utility model.

[0020] Explanation of the accompanying reference numerals: 1. aluminum alloy substrate; 11. wedge-shaped groove; 2. steel cylinder liner; 21. wedge-shaped column; 22. cavity; 3. wear-resistant coating. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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.

[0022] Example 1:

[0023] like Figures 1 to 3 As shown, the utility model provides a rotary engine cylinder block with an inlaid composite cylinder liner, which mainly includes an aluminum alloy matrix 1 and a steel cylinder liner 2 embedded in the aluminum alloy matrix 1.

[0024] like Figure 1 、 Figure 2 As shown, the front and back surfaces of the aluminum alloy substrate 1 are planes, the through hole in the middle of the aluminum alloy substrate 1 is an elongated hole, and the two ends of the elongated hole are semicircular. The through hole penetrates the aluminum alloy substrate 1 in the front-to-back direction of the aluminum alloy substrate 1. A plurality of wedge-shaped grooves 11 distributed along the circumference of the through hole are provided on the inner wall of the through hole of the aluminum alloy substrate 1, and each wedge-shaped groove 11 is symmetrical on the left and right. The wedge-shaped groove 11 is parallel to the axis of the aluminum alloy substrate 1, and the two ends of the wedge-shaped groove 11 extend to the front and back surfaces of the aluminum alloy substrate 1. The cross-section of the wedge-shaped groove 11 is an isosceles trapezoid, and the bottom width of the wedge-shaped groove 11 is greater than the opening width of the wedge-shaped groove 11.

[0025] like Figure 1 、 Figure 3 As shown, the outer wall shape of the steel cylinder liner 2 matches the through hole of the aluminum alloy substrate 1, and the steel cylinder liner 2 is embedded in the through hole of the aluminum alloy substrate 1. The inner wall of the steel cylinder liner 2 is in the shape of an "8", forming a cavity 22 for installing the rotor. There are multiple protruding wedge-shaped columns 21 on the outer wall of the steel cylinder liner 2. The wedge-shaped columns 21 are distributed circumferentially along the outer wall of the steel cylinder liner 2 and correspond one-to-one with the wedge-shaped grooves 11; similarly, the cross-section of the wedge-shaped columns 21 is also an isosceles trapezoid, and the width of the wedge-shaped columns 21 on the side away from the steel cylinder liner 2 is greater than the width on the side close to the steel cylinder liner 2; the wedge-shaped columns 21 are embedded in the wedge-shaped grooves 11, which can prevent the steel cylinder liner 2 and the aluminum alloy substrate 1 from moving relative to each other, thereby improving the stability of the connection. A wear-resistant coating 3 of a certain thickness is sprayed on the inner wall of the steel cylinder liner 2 to further improve the wear resistance of the steel cylinder liner.

[0026] In this embodiment, the aluminum alloy substrate 1 and the steel cylinder liner 2 are interference fit. During processing, the steel cylinder liner 2 is pressed into the aluminum alloy substrate 1 using a heat-shrink process, so that the aluminum alloy substrate 1 and the steel cylinder liner 2 fit tightly together, and the wedge-shaped column 21 and the wedge-shaped groove 11 can also be tightly embedded and clamped. This embodiment improves the bonding strength between the aluminum alloy substrate 1 and the steel cylinder liner 2, is not easily damaged, and can prevent the steel cylinder liner 2 from vibrating or detaching due to high temperature, vibration, etc. This embodiment is based on the aluminum alloy substrate 1 and uses the steel cylinder liner 2 as the inner lining, which reduces the cost of the cylinder body, is easily accepted by the market, and has good economic benefits. The high wear resistance of the steel cylinder liner 2 is utilized to extend the engine overhaul time and life, and reduce the cost of subsequent maintenance.

[0027] Example 2:

[0028] Based on the above embodiment 1, the difference between this embodiment 2 and embodiment 1 is:

[0029] The aluminum alloy substrate 1 and the steel cylinder liner 2 are combined using an inlay casting process. Specifically, the aluminum alloy substrate 1 is first machined, and then the steel cylinder liner 2 is inlaid and cast within the aluminum alloy substrate 1. This casting process ensures a tight bond between the cylinder liner and the substrate, preventing loosening or separation caused by improper processing and improving production efficiency.

[0030] Example 3:

[0031] Based on the above embodiment 1, the difference between this embodiment 3 and embodiment 1 is:

[0032] The aluminum alloy substrate 1 and the steel cylinder liner 2 are combined by an inlay casting process. Specifically, the steel cylinder liner 2 is first processed, and then the aluminum alloy substrate 1 is inlaid and cast outside the steel cylinder liner 2 with the steel cylinder liner 2 as the substrate.

[0033] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A rotary engine cylinder block inlaid with a composite cylinder liner, characterized by: The invention comprises an aluminum alloy substrate (1), wherein the aluminum alloy substrate (1) is provided with a through hole penetrating the front and rear surfaces of the aluminum alloy substrate (1); a steel cylinder sleeve (2) is embedded in the through hole of the aluminum alloy substrate (1), wherein the inner wall of the steel cylinder sleeve (2) is in the shape of an "8", and the joint surface between the steel cylinder sleeve (2) and the through hole of the aluminum alloy substrate (1) has mutually matching recessed grooves and protrusions.

2. The rotary engine cylinder block inlaid with a composite cylinder liner according to claim 1, characterized in that: The through hole of the aluminum alloy substrate (1) is an elongated hole, and both ends of the elongated hole are semicircular. A wedge-shaped groove (11) is provided on the inner wall of the through hole of the aluminum alloy substrate (1), and the wedge-shaped groove (11) extends to the front and back surfaces of the aluminum alloy substrate (1).

3. The rotary engine cylinder block inlaid with a composite cylinder liner according to claim 2, characterized in that: The outer wall shape of the steel cylinder sleeve (2) matches the through hole of the aluminum alloy substrate (1), and a protruding wedge-shaped column (21) is provided on the outer wall of the steel cylinder sleeve (2). The wedge-shaped column (21) is engaged in a one-to-one correspondence with the wedge-shaped groove (11) in the through hole of the aluminum alloy substrate (1).

4. The rotary engine cylinder block inlaid with a composite cylinder liner according to claim 3, characterized in that: The wedge-shaped grooves (11) in the through hole of the aluminum alloy substrate (1) are distributed in a bilaterally symmetrical manner.

5. The rotary engine cylinder block inlaid with a composite cylinder liner according to claim 3, characterized in that: The width of the wedge-shaped column (21) on the side away from the steel cylinder liner (2) is greater than the width on the side close to the steel cylinder liner (2).

6. The rotary engine cylinder block inlaid with a composite cylinder liner according to claim 5, characterized in that: The cross section of the wedge-shaped column (21) is an isosceles trapezoid.

7. The rotary engine cylinder block inlaid with a composite cylinder liner according to claim 3, characterized in that: The aluminum alloy substrate (1) and the steel cylinder sleeve (2) are fitted with an interference fit, and the steel cylinder sleeve (2) is pressed into the aluminum alloy substrate (1) using a shrink fit process, and the directions of the wedge-shaped groove (11) and the wedge-shaped column (21) are parallel to the axes of the aluminum alloy substrate (1) and the steel cylinder sleeve (2).

8. The rotary engine cylinder block inlaid with a composite cylinder liner according to claim 3, characterized in that: The aluminum alloy matrix (1) and the steel cylinder liner (2) are combined using an inlay casting process, with the processed aluminum alloy matrix (1) serving as the matrix, and the steel cylinder liner (2) being inlaid and cast in the aluminum alloy matrix (1).

9. The rotary engine cylinder block inlaid with a composite cylinder liner according to claim 3, characterized in that: The aluminum alloy matrix (1) and the steel cylinder liner (2) are combined using an inlay casting process, with the processed steel cylinder liner (2) serving as the matrix, and the aluminum alloy matrix (1) being inlay-casted outside the steel cylinder liner (2).

10. The rotary engine cylinder block inlaid with a composite cylinder liner according to claim 1, characterized in that: The inner wall of the steel cylinder liner (2) is sprayed with a wear-resistant coating (3).

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