Piston gas ring and engine
By setting an air passage assembly at the end of the piston rings, turbulence is created to suppress air leakage, thus solving the problem of large air leakage in the engine and improving the engine's economy and reliability.
Patent Information
- Application Number
- CN202520160164.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-23
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2035-01-23
AI Technical Summary
Existing piston rings cause significant engine leakage, affecting power output, fuel consumption, and emissions, and are difficult to effectively suppress.
An air passage assembly is provided at the end of the piston ring, including an open air passage, an end face air passage, and an inner ring air passage. Turbulence is generated through the air passage assembly to suppress air leakage and reduce the amount of air leakage.
By capturing airflow and changing its direction through the air intake assembly, turbulence is created, effectively suppressing air leakage and improving engine economy and reliability.
Smart Images
Figure CN223562934U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the engine technical field, more particularly, to a piston gas ring and an engine. BACKGROUND
[0002] Piston ring is a metal ring embedded in the groove of the piston, which is divided into two types: gas ring and oil ring. The gas ring can be used to seal the combustible mixture in the combustion chamber; the oil ring is used to scrape off the excess oil on the cylinder. The piston ring is widely used in various power machines, such as steam engine, diesel engine, gasoline engine, compressor, hydraulic machine, etc., and is widely used in cars, trains, ships, yachts, etc.
[0003] With the continuous updating of emission regulations, more stringent requirements are put forward for engine oil consumption and air leakage. As one of the core components of the engine, the piston ring has an important influence on air leakage. The demand for high power and high explosion pressure of the engine leads to a large air leakage of the existing model, which not only affects the output power and torque, but also increases the fuel consumption. In addition, large air leakage may generate excess heat, increasing the burden of the cooling system and affecting the emission.
[0004] Therefore, how to reduce the air leakage of the engine and improve the economy and reliability of the engine is a problem to be solved by those skilled in the art. CONTENT OF THE INVENTION
[0005] Therefore, the purpose of the present application is to provide a piston gas ring to reduce the air leakage of the engine and improve the economy and reliability of the engine.
[0006] Another purpose of the present application is to provide an engine with the above-mentioned piston gas ring.
[0007] To achieve the above-mentioned purpose, the present application provides the following technical solutions:
[0008] The first aspect of the present application provides a piston gas ring, comprising a piston ring first end and a piston ring second end, and a piston ring opening is formed between the piston ring first end and the piston ring second end;
[0009] At least one of the piston ring first end and the piston ring second end is provided with a gas channel group, which comprises:
[0010] An opening gas channel is connected to the piston ring opening;
[0011] An end face gas channel is connected to the upper end face of the piston gas ring, and the end face gas channel is connected to the opening gas channel.
[0012] In a possible implementation, the opening air channel is a tapered air channel or a cylindrical air channel, when the opening air channel is a tapered air channel, the end of the opening air channel with a larger diameter is the end connected to the piston ring opening, when the opening air channel is a cylindrical air channel, the end of the opening air channel connected to the piston ring opening has a chamfered opening.
[0013] and / or,
[0014] The end surface air channel is a tapered air channel or a cylindrical air channel, when the end surface air channel is a tapered air channel, the end of the end surface air channel with a larger diameter is the end connected to the upper end surface of the piston air ring, when the end surface air channel is a cylindrical air channel, the end of the end surface air channel connected to the upper end surface of the piston air ring has a chamfered opening.
[0015] In a possible implementation, the end surface air channel is an inclined air channel, and the included angle with the axis of the piston air ring is 15°-60°, the end of the end surface air channel connected to the upper end surface of the piston air ring is farther away from the other end of the piston ring opening;
[0016] and / or,
[0017] The opening air channel is an inclined air channel, and the included angle with the end surface of the piston ring opening is 15°-50°, the end of the opening air channel connected to the piston ring opening is located above the other end.
[0018] In a possible implementation, the air channel group further includes an inner ring air channel, the inner ring air channel is connected to the inner surface of the piston air ring, and the opening air channel, the end surface air channel and the inner ring air channel are connected to each other.
[0019] In a possible implementation, the opening air channel, the end surface air channel and the inner ring air channel are connected to the same point.
[0020] and / or,
[0021] The inner ring air channel is a tapered air channel or a cylindrical air channel, when the inner ring air channel is a tapered air channel, the end of the inner ring air channel with a larger diameter is the end connected to the inner surface of the piston air ring, when the inner ring air channel is a cylindrical air channel, the end of the inner ring air channel connected to the inner surface of the piston air ring has a chamfered opening.
[0022] In a possible implementation, the inner ring air channel is an inclined air channel, and the included angle with the axis of the piston air ring is 30°-90°, the end of the inner ring air channel connected to the inner surface of the piston air ring is located above the other end.
[0023] and / or,
[0024] The air passage inside the ring is connected to one end of the inner surface of the piston ring, and the distance between the air passage and the end face of the piston ring opening is not less than 10mm.
[0025] In one possible implementation, the end face air passage is connected to one or more end face air passage openings on the upper end face of the piston ring;
[0026] And / or,
[0027] The air passage within the ring connects to one or more air passage openings on the inner surface of the piston ring.
[0028] In one possible implementation, both the first end and the second end of the piston ring are provided with the air passage assembly;
[0029] The air passage group on the first end of the piston ring is the first air passage group, and the air passage group on the second end of the piston ring is the second air passage group. The first air passage group and the second air passage group have the same structure.
[0030] In one possible implementation, the first air passage group and the second air passage group are arranged symmetrically along the piston ring opening.
[0031] The piston ring provided in this application has an air passage assembly on at least one of the first end and the second end of the piston ring. This air passage assembly includes a connected open air passage and an end-face air passage. The opening of the open air passage connects to the piston ring opening, and the opening of the end-face air passage connects to the upper end face of the piston ring. When the gas pressure at the closed gap of the piston ring opening is less than the gas pressure at the upper end face of the piston ring, the gas at the upper end face of the piston ring will enter the end-face air passage through the opening of the end-face air passage, and then enter the open air passage through the opening of the open air passage. It will then be blown towards the closed gap of the piston ring opening through the opening of the open air passage, where it convects with the leaking gas at the closed gap. The resulting turbulence from the airflow collision inevitably leads to energy dissipation, thus inhibiting further downward movement of the gas.
[0032] When the air pressure on the upper end face of the piston ring is less than the air pressure at the closed gap of the piston ring opening, the gas at the closed gap of the piston ring opening will enter the open air passage through the air passage opening, and then enter the end face air passage through the air passage opening. It will then be blown towards the side gap of the upper end face of the piston ring through the air passage opening, forming turbulence, thereby achieving the result of suppressing air leakage.
[0033] This application captures the airflow at the side gap / closed gap and changes the gas flow direction to achieve convection with the original airflow, forming turbulence, thereby suppressing air leakage and improving engine economy and reliability.
[0034] A second aspect of this application provides an engine including piston rings as described in any of the preceding claims.
[0035] The engine provided by the present application has all the technical effects of the piston gas ring, and thus will not be described herein. BRIEF DESCRIPTION OF DRAWINGS
[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.
[0037] Figure 1 A front view of a partial cross-sectional structure of the piston gas ring disclosed by the present application;
[0038] Figure 2 A top view of a partial cross-sectional structure of the piston gas ring disclosed by the present application;
[0039] Figure 3 A front view of a partial cross-sectional structure of the piston gas ring disclosed by another embodiment of the present application;
[0040] Figure 4 A top view of a partial cross-sectional structure of the piston gas ring disclosed by another embodiment of the present application;
[0041] Figure 5 A schematic diagram of the working principle of the piston gas ring disclosed by the present application;
[0042] Figure 6 A schematic diagram of the working principle of the piston gas ring disclosed by another embodiment of the present application.
[0043] The meanings of the various reference numerals in the drawings are as follows:
[0044] 100 - first end portion of the piston ring; 101 - first end face air passage; 1011 - first end face air passage opening; 102 - first ring inner air passage; 1021 - first ring inner air passage opening; 103 - first open air passage;
[0045] 120 - opening of the piston ring;
[0046] 200 - second end portion of the piston ring; 201 - second end face air passage; 2011 - second end face air passage opening; 202 - second ring inner air passage; 2021 - second ring inner air passage opening; 203 - second open air passage;
[0047] 300 - piston. DETAILED DESCRIPTION
[0048] The core of the present application is to provide a piston gas ring to reduce the engine air leakage, improve the engine economy and reliability.
[0049] Another core of the present application is to provide an engine with the above-mentioned piston gas ring.
[0050] Hereinafter, embodiments will be described with reference to the accompanying drawings. In addition, the embodiments shown below do not have any limiting effect on the application content recited in the claims. In addition, the entire content of the configuration represented in the following embodiments is not limited to what is necessary as a solution to the application recited in the claims. Note that, for the sake of description, only the parts related to the application are shown in the drawings. In the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.
[0051] During engine operation, the air leakage path of the piston includes: 1) due to the irregularity of the thermal deformation of the cylinder liner, during engine operation, the piston gas ring end face is not completely fitted with the cylinder liner, and gas will leak along the non-fitted area; 2) air flow will leak along the closed gap at the opening of the piston ring; 3) the piston gas ring will move up and down during operation due to cylinder pressure, inertial force, twisting, etc., and gas will leak along the channel from the upper gap to the back gap to the lower gap. Under the premise of not changing the geometric shape, it is difficult to close the non-fitted area of the piston gas ring end face and the cylinder liner, and at present, the leakage of the latter two paths is generally suppressed to reduce the air leakage.
[0052] As shown in Figure 1 and Figure 2 , the piston gas ring disclosed in the embodiments of the present application includes a piston ring first end portion 100 and a piston ring second end portion 200. It should be noted that Figure 2 is a top view, the top view of the piston gas ring should be a ring structure, and in order to facilitate the display of the structure of the gas passage group, the rectangular structure is still displayed. Those skilled in the art can understand that the structure in the front view is the structure in the height direction of the piston gas ring (the edge located at the upper part is the upper end face of the piston gas ring, and the edge located at the lower part is the lower end face of the piston gas ring), and the top view shows the structure in the thickness direction of the piston gas ring (the edge located at the upper part is the inner ring of the piston gas ring, and the edge located at the lower part is the outer ring of the piston gas ring).
[0053] The piston ring first end portion 100 and the piston ring second end portion 200 form a piston ring opening 120 therebetween, and after the piston gas ring is installed to the corresponding position of the piston 300 (as shown in Figure 5 and Figure 6 ), the position where the piston ring opening 120 is located is the closed gap region of the piston ring.
[0054] At least one of the piston ring first end portion 100 and the piston ring second end portion 200 is provided with a gas passage group, and the gas passage group includes an opening gas passage and an end face gas passage. The opening gas passage is communicated to the piston ring opening 120, that is, the gas passage port of the opening gas passage is communicated to the piston ring opening 120. The end face gas passage is communicated to the upper end face of the piston gas ring, that is, the gas passage port of the end face gas passage is communicated to the upper end face of the piston gas ring, and the end face gas passage is communicated to the opening gas passage.
[0055] The gas passage group can be arranged only on one of the piston ring first end portion 100 and the piston ring second end portion 200, or can be arranged on both the piston ring first end portion 100 and the piston ring second end portion 200.
[0056] In the embodiment, the piston ring first end portion 100 and the piston ring second end portion 200 are both provided with a gas passage group. The gas passage group on the piston ring first end portion 100 is a first gas passage group, the gas passage group on the piston ring second end portion 200 is a second gas passage group, and the structures of the first gas passage group and the second gas passage group can be the same.
[0057] It should be noted that the structures of the first gas passage group and the second gas passage group are the same, that is, the gas passages included in the first gas passage group and the second gas passage group are the same, but the angles, sizes and positions of the gas passages can be designed to be different according to requirements. For example, the first gas passage group and the second gas passage group both include an opening gas passage and an end face gas passage, but the inclination angles and sizes of the opening gas passages of the first gas passage group and the second gas passage group can be different.
[0058] The first gas passage group and the second gas passage group can be symmetrically arranged along the piston ring opening 120, or can be asymmetrically arranged. The specific arrangement form can be designed by those skilled in the art according to application scenarios.
[0059] In the embodiment, in order to facilitate distinction, the opening gas passage of the first gas passage group is a first opening gas passage 103, and the end face gas passage is a first end face gas passage 101. The opening gas passage of the second gas passage group is a second opening gas passage 203, and the end face gas passage is a second end face gas passage 201.
[0060] The piston gas ring disclosed in the embodiments of the present application is provided with a gas passage group on at least one of the piston ring first end portion 100 and the piston ring second end portion 200. For example, the piston ring first end portion 100 and the piston ring second end portion 200 are both provided with a gas passage group.
[0061] The air passage assembly includes interconnected open air passages (such as the first open air passage 103 and the second open air passage 203) and end-face air passages (the first end-face air passage 101 and the second end-face air passage 201). The air passage openings of the first open air passage 103 and the second open air passage 203 are both connected to the piston ring opening 120, and the air passage openings of the first end-face air passage 101 and the second end-face air passage 201 (i.e., the first end-face air passage opening 1011 and the second end-face air passage opening 2011) are both connected to the upper end face of the piston ring.
[0062] like Figure 5 As shown, when the air pressure at the closed gap of the piston ring opening 120 is less than the air pressure at the upper end face of the piston ring (i.e., the side gap of the piston ring), the gas at the upper end face of the piston ring will enter the first end face air passage 101 and the second end face air passage 201 through the air passage opening of the end face air passage, and then enter the first open air passage 103 and the second open air passage 203 through the first end face air passage 101 and the second end face air passage 201 respectively. It will be blown towards the closed gap of the piston ring opening 120 through the air passage opening of the first open air passage 103 and the second open air passage 203 respectively. The gas flow will be convected with the leakage flow at the closed gap. After the airflow is turbulent, it will inevitably cause energy dissipation, thereby inhibiting the gas from moving further downward along the closed gap.
[0063] like Figure 6 As shown, when the air pressure on the upper end face of the piston ring is less than the air pressure at the closed gap of the piston ring opening 120, the gas at the closed gap of the piston ring opening 120 will enter the first opening air passage 103 and the second opening air passage 203 through the air passage openings of the first opening air passage 103 and the second opening air passage 203, respectively. It will then enter the first end face air passage 101 and the second end face air passage 201 through the air passage openings of the first end face air passage 101 and the second end face air passage 201, respectively. Finally, it will be blown into the side gap of the upper end face of the piston ring through the air passage openings of the first end face air passage 101 and the second end face air passage 201, respectively, forming turbulence, thereby achieving the result of suppressing the leakage.
[0064] This application embodiment captures the airflow at the side gap / closed gap and changes the gas flow direction to achieve convection with the original airflow, forming turbulence, thereby suppressing air leakage and improving engine economy and reliability.
[0065] In a specific embodiment of this utility model, the open air passage can be either a conical air passage or a cylindrical air passage. The first open air passage 103 and the second open air passage 203 can have the same structure or different structures. For example, the first open air passage 103 can be a conical air passage, while the second open air passage 203 can be a cylindrical air passage, or vice versa. Alternatively, both the first open air passage 103 and the second open air passage 203 can be conical air passages, or both can be cylindrical air passages. When the open air passage is a conical air passage, according to Bernoulli's principle, the airflow pressure will increase as the airflow passage narrows, thereby improving the turbulence resistance.
[0066] When the opening air passage is a conical air passage, the end with the larger diameter of the opening air passage is the end that connects to the piston ring opening 120. That is, when the first opening air passage 103 adopts a conical air passage, the end of the first opening air passage 103 that connects to the piston ring opening 120 is the end with the larger diameter; when the second opening air passage 203 adopts a conical air passage, the end of the second opening air passage 203 that connects to the piston ring opening 120 is the end with the larger diameter.
[0067] When the open air passage is cylindrical, the end of the open air passage that connects to the piston ring opening 120 has a chamfered opening. By setting a chamfered opening at the air passage opening of the cylindrical air passage, gas can easily enter the open air passage through the chamfered opening.
[0068] like Figure 3 As shown in a specific embodiment of this utility model, the end-face air passage can be either a conical air passage or a cylindrical air passage. The first end-face air passage 101 and the second end-face air passage 201 can adopt the same structure or different structures. For example, the first end-face air passage 101 can be a conical air passage, while the second end-face air passage 201 can be a cylindrical air passage, or vice versa. Alternatively, both the first end-face air passage 101 and the second end-face air passage 201 can be conical air passages, or both can be cylindrical air passages. When the end-face air passage adopts a conical air passage, according to Bernoulli's principle, the airflow pressure will increase as the airflow passage narrows, thereby improving the turbulence capability.
[0069] When the end face air passage is a conical air passage, the end with the larger diameter of the end face air passage is the end that connects to the upper end face of the piston ring. That is, when the first end face air passage 101 adopts a conical air passage, the air passage opening of the first end face air passage 101 that connects to the upper end face of the piston ring is the end with the larger diameter; when the second end face air passage 201 adopts a conical air passage, the air passage opening of the second end face air passage 201 that connects to the upper end face of the piston ring is the end with the larger diameter.
[0070] When the end face air passage is cylindrical, the end of the end face air passage that connects to the upper end face of the piston ring has a chamfered opening. By setting a chamfered opening at the air passage opening of the cylindrical air passage, gas can easily enter the end face air passage through the chamfered opening.
[0071] In the embodiment, only one of the open air channel and the end face air channel can be designed as a tapered air channel, and the other one can be designed as a cylindrical air channel. Generally, the first end face air channel 101 and the second end face air channel 201 are designed as tapered air channels, and the first open air channel 103 and the second open air channel 203 are designed as cylindrical air channels, so that the flow path of the gas flow is that the gas passing through the upper gap of the piston ring enters the first end face air channel 101 and the second end face air channel 201, and after being accelerated in the tapered structure of the first end face air channel 101 and the second end face air channel 201, the gas is sprayed out through the air channel ports of the first open air channel 103 and the second open air channel 203, so as to inhibit the gas from further running downward along the closed gap.
[0072] In the embodiment, the angle between the end face air channel and the axis of the piston ring is 15°-60°, and the end of the end face air channel connected to the upper end face of the piston ring is farther away from the piston ring opening 120 than the other end. That is, the air channel port of the first end face air channel 101 is inclined to the direction of the side end face away from the first end portion 100 of the piston ring, and the air channel port of the second end face air channel 201 is inclined to the direction of the side end face away from the second end portion 200 of the piston ring. In the embodiment, the end face air channel is designed as an inclined air channel, which can make the gas flow path from the end face air channel to the open air channel relatively gentle, and more easily ensure the gas flow in the air channel, so that the gas flowing out through the air channel port collides with the leaked gas to generate turbulent flow, causing energy dissipation, and achieving the effect of inhibiting the leaked gas from running downstream.
[0073] In the embodiment, the open air channel can also be designed as an inclined air channel, and the angle between the open air channel and the end face of the piston ring opening 120 is 15°-50°, and the end of the open air channel connected to the end face of the piston ring opening 120 is located above the other end. The greater the inclination angle of the open air channel, the greater the gas flow inhibition range, but the inhibition effect is weaker, and the smaller the inclination angle, the smaller the gas flow inhibition range, but the inhibition effect is stronger. That is, the air channel port of the first open air channel 103 is inclined to the direction of the upper end face of the first end portion 100 of the piston ring, and the air channel port of the second open air channel 203 is inclined to the direction of the upper end face of the second end portion 200 of the piston ring. So that the gas flow sprayed out through the air channel ports of the first open air channel 103 and the second open air channel 203 flows to the obliquely upward direction, and forms a convection with the gas leaked downward, so as to inhibit the gas from further running downward along the closed gap. Moreover, the upward inclined arrangement of the open air channel also easily makes the gas at the closed gap of the piston ring opening 120 more easily enter the first open air channel 103 and the second open air channel 203 through the air channel ports of the first open air channel 103 and the second open air channel 203 when the gas pressure of the upper end face of the piston ring is less than the gas pressure at the closed gap of the piston ring opening 120.
[0074] Because gas will leak along the channel of the upper gap to the back gap to the lower gap, in this embodiment, the gas passage group can also include an inner ring gas passage, which is communicated to the inner surface of the piston gas ring, and the opening gas passage, the end surface gas passage and the inner ring gas passage are communicated with each other.
[0075] As shown in Figure 1 and Figure 2 When the gas passages are arranged at both the first end portion 100 and the second end portion 200 of the piston ring, in order to facilitate the distinction, the inner ring gas passage of the first gas passage group is defined as the first inner ring gas passage 102, and the inner ring gas passage of the second gas passage group is defined as the second inner ring gas passage 202.
[0076] As shown in Figure 5 When the gas pressure at the closed gap of the piston ring opening 120 is less than the gas pressure of the upper end surface of the piston gas ring (i.e. the side gap of the piston ring), the gas of the upper end surface of the piston gas ring will enter the first end surface gas passage 101 and the second end surface gas passage 201 through the gas passage port of the end surface gas passage, and the gas of the back gap of the piston ring (i.e. the gap between the inner ring of the piston gas ring and the piston) will enter the first inner ring gas passage 102 and the second inner ring gas passage 202 through the gas passage port of the inner ring gas passage.
[0077] The gas in the first end surface gas passage 101 and the gas in the first inner ring gas passage 102 both correspond to enter the first opening gas passage 103, the gas in the second end surface gas passage 201 and the gas in the second inner ring gas passage 202 both correspond to enter the second opening gas passage 203, and blow to the closed gap of the piston ring opening 120 through the gas passage ports of the first opening gas passage 103 and the second opening gas passage 203 respectively, and flow against the leakage gas at the closed gap. After the turbulent flow generated by the counterflow, energy dissipation will inevitably occur, which achieves the effect of inhibiting the further downward movement of the gas along the closed gap.
[0078] As shown in Figure 6 When the gas pressure of the upper end surface and the back of the piston gas ring is less than the gas pressure at the closed gap of the piston ring opening 120, the gas at the closed gap of the piston ring opening 120 will enter the first opening gas passage 103 and the second opening gas passage 203 through the gas passage ports of the first opening gas passage 103 and the second opening gas passage 203 respectively.
[0079] The gas in the first open air channel 103 enters the first end face air channel 101 and the first ring inner air channel 102 respectively, and the gas in the second open air channel 203 enters the second end face air channel 201 and the second ring inner air channel 202 respectively. Finally, the air channel openings of the first end face air channel 101, the second end face air channel 201, the first ring inner air channel 102 and the second ring inner air channel 202, namely the first ring inner air channel opening 1021 and the second ring inner air channel opening 2021, blow into the upper end face side gap and the back gap of the piston air ring respectively, form turbulence, and thus the result of inhibiting the amount of blow-by gas is achieved.
[0080] When the ring inner air channel and the end face air channel converge, energy dissipation of the gas can be caused, and the energy dissipation can be reduced by adjusting the angles of the two air channels and increasing the baffle and the like to guide the fluid of the two air channels.
[0081] In an embodiment of the utility model, the open air channel, the end face air channel and the ring inner air channel can be communicated at the same point. That is, the first open air channel 103, the first ring inner air channel 102 and the first end face air channel 101 are communicated at the same point, and the second open air channel 203, the second ring inner air channel 202 and the second end face air channel 201 are communicated at the same point. In this way, the open air channel, the end face air channel and the ring inner air channel form fewer turning points of the airflow path, that is, only one turning point, which can reduce the gas flow resistance.
[0082] The ring inner air channel can be a tapered air channel or a cylindrical air channel. The first ring inner air channel 102 and the second ring inner air channel 202 can adopt air channels of the same structure or air channels of different structures, for example, the first ring inner air channel 102 adopts a tapered air channel, and the second ring inner air channel 202 adopts a cylindrical air channel, or vice versa. The first ring inner air channel 102 and the second ring inner air channel 202 can also adopt tapered air channels or cylindrical air channels. When the ring inner air channel adopts a tapered air channel, according to Bernoulli's principle, the airflow pressure will increase as the airflow channel narrows, so as to improve the turbulence ability.
[0083] When the ring inner air channel is a tapered air channel, the end with a larger diameter of the ring inner air channel is the end communicated to the inner surface of the piston air ring. That is, when the first ring inner air channel 102 adopts a tapered air channel, the air channel opening of the end of the first ring inner air channel 102 communicated to the inner surface of the piston air ring is the end with a larger diameter, and when the second ring inner air channel 202 adopts a tapered air channel, the air channel opening of the end of the second ring inner air channel 202 communicated to the inner surface of the piston air ring is the end with a larger diameter.
[0084] When the ring inner air channel is a cylindrical air channel, the end of the ring inner air channel communicated to the inner surface of the piston air ring has a chamfered opening. By arranging the chamfered opening at the air channel opening of the cylindrical air channel, the gas can pass through the chamfered opening and enter the ring inner air channel.
[0085] In one specific embodiment of this application, the inner ring air passage can be an inclined air passage, with an angle of 30° to 90° with the axis of the piston ring. One end of the inner ring air passage connecting to the inner ring surface of the piston ring is located above the other end. That is, the air passage opening of the first inner ring air passage 102 is inclined towards the upper end face of the piston ring, and the air passage opening of the second inner ring air passage 202 is also inclined towards the upper end face of the piston ring. This causes the airflow ejected through the air passage openings of the first inner ring air passage 102 and the second inner ring air passage 202 to flow obliquely upward, forming convection with the gas leaking downward, thereby inhibiting the gas from moving further downward along the back gap. Moreover, the upwardly inclined arrangement of the inner ring air passages also makes it easier for the airflow to enter the first inner ring air passage 102 and the second inner ring air passage 202 through the air passage openings.
[0086] It should be noted that the internal air passage can be in the same plane as the axis of the piston ring, or it can be designed to be tilted at a certain angle to the axis of the piston ring.
[0087] The gas passage inside the ring connects to one end of the inner surface of the piston ring, and the distance between this end and the end face of the piston ring opening 120 is not less than 10 mm. In this embodiment, the gas passage opening inside the ring is kept at a certain distance from the end face of the piston ring opening 120, thereby ensuring the rigidity of the piston ring.
[0088] like Figure 4 As shown in a specific embodiment of this application, the end-face air passage connecting to the upper end face of the piston ring has one or more end-face air passage openings. For example, depending on the application scenario, the number of air passage openings of the first end-face air passage 101 and the second end-face air passage 201 can be selected as 1 to 5 to ensure the airflow entering the end-face air passage. The number of air passage openings of the first end-face air passage 101 and the second end-face air passage 201 can be the same or different, depending on actual needs.
[0089] The annular air passage connects to the inner surface of the piston ring with one or more air passage openings. For example, depending on the application scenario, the number of air passage openings in the first annular air passage 102 and the second annular air passage 202 can be selected from 1 to 5 to ensure the airflow entering the annular air passage. The number of air passage openings in the first annular air passage 102 and the second annular air passage 202 can be the same or different, depending on the actual needs.
[0090] In addition, since the length of the inner ring airway is relatively short, multiple airway openings can be achieved by setting multiple first inner ring airways 102 and multiple second inner ring airways 202.
[0091] The application further discloses an engine comprising the piston air ring disclosed in each of the above embodiments. The engine has all the technical effects of the piston air ring, which will not be repeated here.
[0092] As shown in the present application and claims, unless the context clearly indicates otherwise, the words "one", "an", "a", and / or "the" do not mean a single number, but can also include a plurality. Generally, the terms "comprise" and "include" only indicate the inclusion of the steps and elements explicitly identified, and these steps and elements do not constitute an exclusive list, and the method or device can also include other steps or elements. The element defined by the phrase "comprising a" does not exclude the presence of additional identical elements in the process, method, product or device comprising the element.
[0093] In the description of the present application, unless otherwise explicitly limited, the words such as arrangement, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.
[0094] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be mutually referred to.
[0095] The principles and implementation modes of the present application are described by using specific examples. The above description of the embodiments is only used to help understand the method of the present application and its core idea. It should be pointed out that, for those skilled in the art, without departing from the principles of the present application, some improvements and modifications can be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.
Claims
1. A piston gas ring characterized in that, The piston ring first end portion (100) and the piston ring second end portion (200) form a piston ring opening (120) therebetween; At least one of the piston ring first end portion (100) and the piston ring second end portion (200) is provided with an air passage group, which comprises: An opening air passage, which is communicated to the piston ring opening (120); An end face air passage, which is communicated to the upper end face of the piston gas ring, and the end face air passage is communicated to the opening air passage.
2. The piston gas ring of claim 1 wherein, The opening air passage is a tapered air passage or a cylindrical air passage, when the opening air passage is a tapered air passage, the end with a larger diameter of the opening air passage is the end communicated to the piston ring opening (120), when the opening air passage is a cylindrical air passage, the end communicated to the piston ring opening (120) of the opening air passage has a chamfered port; And / or, The end face air passage is a tapered air passage or a cylindrical air passage, when the end face air passage is a tapered air passage, the end with a larger diameter of the end face air passage is the end communicated to the upper end face of the piston gas ring, when the end face air passage is a cylindrical air passage, the end communicated to the upper end face of the piston gas ring of the end face air passage has a chamfered port.
3. The piston gas ring of claim 1 wherein, The end face air passage is an inclined air passage, and the included angle with the axis of the piston gas ring is 15°-60°, the end communicated to the upper end face of the piston gas ring of the end face air passage is farther away from the piston ring opening (120) than the other end; And / or, The opening air passage is an inclined air passage, and the included angle with the end face of the piston ring opening (120) is 15°-50°, the end communicated to the piston ring opening (120) of the opening air passage is located above the other end.
4. The piston gas ring of claim 1 wherein, The air passage group further comprises an inner ring air passage, which is communicated to the inner surface of the piston gas ring, and the opening air passage, the end face air passage and the inner ring air passage are communicated to each other.
5. The piston gas ring of claim 4 wherein, The opening air passage, the end face air passage and the inner ring air passage are communicated at the same point; And / or, The inner ring air passage is a tapered air passage or a cylindrical air passage, when the inner ring air passage is a tapered air passage, the end with a larger diameter of the inner ring air passage is the end communicated to the inner surface of the piston gas ring, when the inner ring air passage is a cylindrical air passage, the end communicated to the inner surface of the piston gas ring of the inner ring air passage has a chamfered port.
6. The piston gas ring of claim 4 wherein, The inner ring air passage is an inclined air passage, and the included angle with the axis of the piston gas ring is 30-90°, the end communicated to the inner surface of the piston gas ring of the inner ring air passage is located above the other end; And / or, The end communicated to the inner surface of the piston gas ring of the inner ring air passage is not less than 10mm away from the end face of the piston ring opening (120).
7. The piston gas ring of claim 4 wherein, The end face air passage port communicated to the upper end face of the piston gas ring of the end face air passage is 1 or more; And / or, The air passage port communicated to the inner surface of the piston gas ring of the inner ring air passage is 1 or more.
8. The piston gas ring of any one of claims 1-7, wherein, The piston ring first end portion (100) and the piston ring second end portion (200) are both provided with the air passage group; The air passage group on the first end part (100) of the piston ring is a first air passage group, and the air passage group on the second end part (200) of the piston ring is a second air passage group, and the first air passage group and the second air passage group are identical in structure.
9. The piston gas ring of claim 8 wherein, The first air passage group and the second air passage group are symmetrically arranged along the piston ring opening (120).
10. An engine characterized by, A piston comprising a piston ring as claimed in any one of claims 1-9.