Combined piston ring sealing structure with air leakage opening matched with air leakage channel
By designing a combined structure of leakage channels and leakage ports on the piston ring, the leakage problem of traditional piston rings is solved, better sealing performance and force balance are achieved, the leakage impact force and temperature are reduced, and the piston ring deviation is reduced.
Patent Information
- Application Number
- CN202511239787.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-02
- Publication Date
- 2025-10-17
AI Technical Summary
The traditional piston ring structure has problems such as large leakage impact force, high leakage temperature, uneven piston ring back pressure, increased leakage after wear and severe displacement of the piston ring in the ring groove.
A combined piston ring sealing structure consisting of a leakage port and a leakage channel is designed. By machining the leakage channel and the fixed-sized leakage port on the ring body, the initial leakage direction of the gas is changed, the back pressure of the piston ring is balanced, the leakage impact force and temperature are reduced, and the increase in leakage after wear is avoided.
The invention can achieve the goal of not increasing the leakage volume after wear, reducing the leakage impact force and temperature, balancing the piston ring stress, reducing the piston ring deviation, and improving the sealing performance.
Smart Images
Figure CN120799088A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application is mainly used in the field of piston ring sealing. BACKGROUND
[0002] The conventional piston ring structure has poor sealing performance, and has problems of large air leakage impact force, high air leakage temperature, uneven piston ring back pressure stress, increased air leakage after wear, and serious piston ring deviation in the ring groove. The sealing structure of the present application aims to solve the above problems by combining the air leakage port with the air leakage passage. SUMMARY
[0003] A combined piston ring sealing structure combining an air leakage port with an air leakage passage, the present application realizes no increase in air leakage after wear of the piston ring, while reducing the air leakage impact force, reducing the air leakage temperature, balancing the piston ring back pressure, and reducing the piston ring deviation.
[0004] The structure is composed of an upper ring, a lower inner ring, and a lower outer ring. By machining an air leakage passage and a fixed size air leakage port on the ring body, the initial leakage direction of the air leakage is changed, the air leakage impact force is reduced, the air leakage temperature is reduced, and the stress condition of the piston ring is balanced. Since the size of the air leakage port is fixed, the wear does not increase the air leakage.
[0005] By increasing the air leakage passage, the function of multiple air leakage is realized, and the stress condition of the piston ring back pressure is balanced by multiple air leakage ports, avoiding the problem of uneven stress of the piston ring back pressure caused by a single air leakage port, which causes the piston ring to deviate in the ring groove.
[0006] The air leakage passage is a non-full-through air leakage passage, but a structure with one open end and one closed end.
[0007] In order to better illustrate the present application, the following briefly describes the accompanying drawings Figures 1 to 3 .
[0008] Figure 1 The present application is a structure diagram.
[0009] Figure 2 The present application is a structure diagram.
[0010] Figure 3 The present application is a structure diagram. BRIEF DESCRIPTION OF DRAWINGS
[0011] Figure 1 Number 1 upper ring positioning.
[0012] Figure 1 Number 2 lower inner ring positioning.
[0013] Figure 1 Number 3 lower outer ring positioning.
[0014] Figure 1 No. 4 A form of air leakage channel.
[0015] Figure 1 No. 5 Multiple air leaks.
[0016] Figure 1 No. 6 Sheung Wan.
[0017] Figure 1 Number 7 Lower outer ring.
[0018] Figure 1 Number 8 lower inner ring.
[0019] Figure 2 This is a schematic diagram of the overall structure when the piston ring is installed.
[0020] Figure 3 Picture 1 is a schematic diagram of the combination of the lower inner ring and the outer ring.
[0021] Figure 3 Picture 1 Number 1 indicates multiple air leaks.
[0022] Figure 3 Picture 1 Number 2 is the leakage channel.
[0023] Figure 3 Picture 1 Number 3 is the lower inner ring positioning.
[0024] Figure 3 Picture 1 Number 4 is the lower outer ring positioning.
[0025] Figure 3 Picture 2 is a partial schematic diagram of the lower outer ring, where number 1 is a form of leakage channel.
[0026] Figure 3 Picture 3 is a bottom view of the piston ring assembly.
[0027] Figure 3 Picture 4 is a schematic diagram of the split lower inner ring and lower outer ring of the piston ring.
[0028] Figure 3 Picture 5 is a top view of the piston ring assembly.
[0029] Figure 3 Picture 6 is a partial schematic diagram of the lower inner ring and lower outer ring of the piston ring.
[0030] Figure 3 Figure 7 shows a schematic diagram of the simultaneous implementation of leaky channels on both the lower inner ring and the lower outer ring of the piston ring. Number 1 is the leaky channel on the lower inner ring, and number 2 is the leaky channel on the lower outer ring.
[0031] Figure 3Figure 8 is a schematic diagram of the piston ring with the blow-by passage only implemented in the lower inner ring. Wherein the number 1 is the blow-by passage of the lower inner ring.
[0032] Figure 3 Figure 9 is a schematic diagram of the piston ring with the blow-by passage and the blow-by port implemented in the upper ring. Wherein the number 1 is the blow-by passage, and the number 2 is the blow-by port.
[0033] Figure 1 Figure 10 is a schematic diagram of the piston ring with the blow-by passage and the blow-by port implemented in the lower inner ring. Wherein the number 1 is the blow-by port, and the number 2 is the blow-by passage.
[0034] Figure 1 Figure 11 is a schematic diagram of the piston ring with the blow-by passage implemented in the lower outer ring and the blow-by port implemented in the lower inner ring. Wherein the number 1 is the blow-by port, and the number 2 is the blow-by passage. DETAILED DESCRIPTION
[0035] The piston ring of the present application is implemented by machining, and the piston ring with the structure is machined.
[0036] In the first embodiment, the upper ring is machined according to the structure of the upper ring in Figure 1, and the positioning concave points are machined on the upper ring body. The lower inner ring is machined according to Figure 10, and two blow-by ports are machined in the lower plane. The lower outer ring is machined according to Figure 11, and the blow-by passage is machined. When installed, the combination is installed in the first ring groove of the piston, and attention is paid to the position close to the piston head during installation. Figure 1 Figure 2 Figure 1 Figure 3
[0037] In the second embodiment, the upper ring is machined according to the structure of the upper ring in Figure 1, and the positioning concave points are machined on the upper ring body. The lower inner ring is machined according to Figure 11, and two blow-by ports are machined in the lower plane. The lower outer ring is machined according to Figure 11, and the blow-by passage is machined. When installed, the combination is installed in the first ring groove of the piston, and attention is paid to the position close to the piston head during installation. Figure 3 Figure 2
[0038] The preferred scheme is scheme one.
Claims
1. The piston ring air leakage port can be implemented on the lower inner ring body or on the upper ring body.
2. The piston ring leakage channel can be implemented on the lower inner ring body, the lower outer ring body, or the upper ring body.
3. There is no limit on the number of piston ring leakage holes.
4. The cross section of the piston ring leakage channel is not restricted in shape and can be quasi-circular, quasi-square, quasi-triangular or other irregular shapes.
5. There is no limit on the length of the piston ring leakage channel.
6. The piston ring leakage channel is not a full-through leakage channel, but a structure with one end open and the other end closed.