WO2022118988A1 - Segment de piston - Google Patents

Segment de piston Download PDF

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Publication number
WO2022118988A1
WO2022118988A1 PCT/JP2021/044800 JP2021044800W WO2022118988A1 WO 2022118988 A1 WO2022118988 A1 WO 2022118988A1 JP 2021044800 W JP2021044800 W JP 2021044800W WO 2022118988 A1 WO2022118988 A1 WO 2022118988A1
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WO
WIPO (PCT)
Prior art keywords
wear
resistant layer
identification
layer
piston ring
Prior art date
Application number
PCT/JP2021/044800
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English (en)
Japanese (ja)
Inventor
慶吾 亀山
修平 大野
雄一 石田
孝宏 森田
大樹 村山
Original Assignee
株式会社三井Ｅ＆Ｓマシナリー
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社三井Ｅ＆Ｓマシナリー filed Critical 株式会社三井Ｅ＆Ｓマシナリー
Priority to JP2022567022A priority Critical patent/JPWO2022118988A1/ja
Priority to CN202180080763.XA priority patent/CN116583665A/zh
Publication of WO2022118988A1 publication Critical patent/WO2022118988A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F5/00—Piston rings, e.g. associated with piston crown
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
    • F16J9/12—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
    • F16J9/26—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction characterised by the use of particular materials

Definitions

  • the present invention relates to a piston ring, and more particularly to a piston ring in which a wear-resistant layer made of a wear-resistant material is formed on the outer peripheral surface of a base material, and it is easy to determine the wear state of the wear-resistant layer from the appearance. ..
  • the piston ring of an internal combustion engine such as a diesel engine (for example, a 2-stroke diesel main engine for ships) has a sliding surface on its outer circumference that slides on a cylinder liner and wears.
  • the wear-resistant layer has an outer peripheral surface that serves as a sliding surface to the cylinder liner.
  • a wear-resistant material such as a cermet (Ceramics Metal) layer is used, and the outer layer is made of metal or the like. In some cases, a familiar layer (familiar layer) is used.
  • the wear-resistant layer made of a cermet layer has little difference in color and surface shape from the base material, it is difficult to understand the wear state (wear) of the wear-resistant layer from the appearance, and there is a risk that the base material will be worn. be.
  • the piston ring is visually inspected while being incorporated in the diesel engine in the engine room of the ship, which is not sufficiently bright, and it is the crew of the ship who conducts the visual inspection of the piston ring. Since he is not an expert in manufacturing, it is difficult to confirm the wear state of the sliding surface from the appearance.
  • the present invention has been made in view of such conventional circumstances, and a wear-resistant layer made of a wear-resistant material is formed on the outer peripheral surface of the base material, and the wear state of the wear-resistant layer can be determined from the appearance. It is an object of the present invention to provide an easy piston ring.
  • a wear-resistant layer of a wear-resistant material is formed on the outer periphery of the base material, and a familiar layer is laminated on the outer layer of the wear-resistant layer to have a sliding surface formed flush with each other.
  • a piston ring provided with a wear identification material made of a member different from the base material on the outer peripheral surface of the base material. 2.
  • the piston ring according to 1 above, wherein the wear identification material has a top flush with the sliding surface. 3.
  • the piston ring according to 1 above, wherein the wear identification material has a top covered with the familiar layer. 4.
  • a wear-resistant layer of a wear-resistant material is formed on the outer periphery of the base material, and a familiar layer is laminated on the outer layer of the wear-resistant layer to have a sliding surface formed flush with each other.
  • the piston ring according to 6 above wherein a wear identification material made of a member different from the base material is fitted in the wear identification recess. 8. 6. The piston ring according to 6 or 7, wherein the wear identification recess is covered with the wear resistant layer and / or the familiar layer. 9. The piston ring according to any one of 6 to 8, wherein the wear identification recess has a shape representing a character or a figure when viewed from the outer peripheral side of the sliding surface. 10. The piston ring according to any one of 6 to 9, wherein a wear-resistant layer and / or a wear-identifying material made of a member different from the wear-resistant layer and the familiar layer is embedded in the wear-resistant layer and / or the familiar layer.
  • a piston ring in which only a wear-resistant layer (single layer) is formed
  • a piston ring made of a ring-shaped base material.
  • a wear identification recess is provided on the outer peripheral portion of the base material.
  • 12. The piston ring according to 11 above, wherein the wear identification recess is provided from the outer peripheral surface of the base material to a certain depth.
  • a wear identification material made of a member different from the base material is fitted in the wear identification recess. 14.
  • 20. A piston ring made of a ring-shaped base material. The outer peripheral surface of the base material is covered with the wear-resistant layer of the wear-resistant material, and the surface of the wear-resistant layer is a sliding surface.
  • 21. The piston ring according to any one of 13 to 17 and 20, wherein the wear identification material has a shape representing a character or a figure when viewed from the outer peripheral side of the sliding surface.
  • the present invention can provide a piston ring in which a wear-resistant layer made of a wear-resistant material is formed on the outer peripheral surface of the base material, and it is easy to determine the wear state of the wear-resistant layer from the appearance.
  • FIG. 1 Perspective view of the piston ring according to the present invention
  • FIG. 1 Perspective view of the piston ring according to the present invention
  • FIG. 1 Perspective view of the piston ring according to the present invention
  • Enlarged perspective view and vertical cross-sectional view of the main part showing the steps (groove processing) (a) to (d) for manufacturing the wear identification recess in the third embodiment.
  • An enlarged perspective view and a vertical sectional view of a main part showing a process for producing a wear-resistant layer (groove processing) (e) and a process for producing a familiar layer (f) in the third embodiment.
  • the worn state, (d) indicates a state in which the wear-resistant layer is worn.
  • FIG. 4 is an enlarged view of a cross section taken along the line AA of FIG. 1 in the fourth embodiment, where FIG. 1E shows a state in which the wear-resistant layer is worn, and FIG. 1F shows a state in which the base metal is worn by a certain amount.
  • 5 is an enlarged view of a cross section taken along the line AA of FIG. 1 in the fifth embodiment, where (a) is a state without wear, (b) is a state in which the wear-resistant layer is worn, and (c) is a base material. Shows a certain amount of wear.
  • 6 is an enlarged view of a cross section taken along the line AA of FIG. 1 in the sixth embodiment, where (a) is a state without wear, (b) is a state in which the wear-resistant layer is worn, and (c) is a base material. Shows a certain amount of wear.
  • 7 is an enlarged view of a cross section taken along the line AA of FIG.
  • FIG. 1 is a perspective view of a piston ring according to the present invention.
  • FIG. 2 is a plan view of the piston ring according to the present invention.
  • an outer peripheral layer 2 is formed on the outer periphery of the base material 1 formed in a ring shape.
  • the outer peripheral layer 2 is provided with a wear resistant layer 2a made of a wear resistant material, and the outer peripheral surface of the wear resistant layer 2a is configured as a sliding surface 3.
  • a familiar layer (familiar layer) 2b is further formed on the outer layer of the wear resistant layer 2a, and the outer peripheral surface of the familiar layer 2b is a sliding surface 3.
  • the cermet (Ceramics Metal) layer that is sprayed or plated on the outer peripheral surface of the base material has little difference in color and surface shape from the base material. be.
  • FIG. 3A and 3B are enlarged views of a cross section taken along the line AA of FIG. 1 in the first embodiment, where FIG. 3A is a state without wear, FIG. 3B is a state in which the familiar layer is worn out, and FIG. Indicates that the wear-resistant layer is worn out.
  • the familiar layer 2b is laminated on the outer layer of the wear-resistant layer 2a to form a sliding surface 3 to the cylinder liner. That is, the outer peripheral surface of the familiar layer 2b becomes a flush sliding surface 3.
  • the base metal 1 is not particularly limited, but is made of various cast iron, cast steel, carbon steel for general structure, copper alloy, sintered alloy and the like.
  • the wear-resistant layer 2a is made of a wear-resistant material, for example, a ceramic material such as Cr 3 C 2 , Al 2 O 3 , WC, Cr 2 O 3 , ZrO 2 , and Cr, Co, Ni, Mo, Fe. Cermet to which a metal such as Cu or Cu is added is preferably used. Further, the wear-resistant layer 2a is formed by, for example, thermal spraying, electrolyte plating, or electrolyte plating, and an electrolyte plating layer containing ceramic particles. The thickness of the wear-resistant layer 2a is, for example, about 0.3 to 0.6 mm.
  • the outer peripheral surface of the familiar layer 2b is a sliding surface 3 to the cylinder liner, and is, for example, a metal such as Cr, Co, Ni, Mo, Fe, Cu or a mixture thereof, or Cr 3C 2 , WC. , Al 2 O 3 and other ceramic materials, or composite materials thereof. Further, the familiar layer 2b is formed by, for example, thermal spraying, electrolyte plating, or chrome ceramic composite plating. The thickness of the familiar layer 2b is, for example, about 0.1 to 0.3 mm.
  • the familiar layer 2b is a layer provided so as to be worn early after the start of use and to adapt the shape of the sliding surface 3 to the shape of the inner surface of the cylinder.
  • the wear identification material 4 is provided on the outer peripheral surface of the base material 1.
  • the wear identification material 4 is made of a member different from the base material 1.
  • the wear identification material 4 preferably has a different color from any of the familiar layer 2b, the wear resistant layer 2a, and the base material 1. This makes it easy to distinguish the wear identification material 4 from the familiar layer 2b, the wear resistant layer 2a, and the base material 1.
  • a pin-shaped member is driven in at a depth reaching the base material 1 from the sliding surface 3, or the wear-resistant layer 2a and the familiar layer 2a and the familiar layer 4 are used. It is arranged by forming a hole in the layer 2b and inserting a wear identification material made of another member, or by forming a recess in the wear resistant layer 2a and the familiar layer 2b and filling the recess by welding or thermal spraying. Can be done.
  • the top of the wear identification material 4 may face outward and be flush with the sliding surface 3, or the familiar layer 2b may cover the top of the wear identification material 4. .. When the top of the wear identification material 4 faces outward, the top of the wear identification material 4 forms a part of the sliding surface 3.
  • the wear identification material 4 is preferably made of a material having the same wear resistance as the material forming the wear resistant layer 2a or having a low wear resistance. This is because if the wear resistance of the wear identification material 4 is higher than that of the wear resistance layer 2a, only the wear identification material 4 may remain and protrude from the sliding surface 3 when the wear resistance layer 2a is worn. ..
  • FIG. 4 is an enlarged perspective view of a main part in the first embodiment.
  • the wear identification material 4 preferably has a shape representing characters and figures when viewed from the outer peripheral side of the sliding surface 3 in order to facilitate identification of the wear state.
  • the wear identification recess 5, which will be described later, is preferably shaped to represent characters and figures when viewed from the outer peripheral side of the sliding surface 3 in order to facilitate identification of the wear state.
  • the wear-resistant layer 2a when the wear-resistant layer 2a is worn away, the base metal 1 appears as shown in FIG. 3 (c). At this time, the wear of the wear-resistant layer 2a can be identified from the appearance by the disappearance of the wear identification material 4. At this time, the piston ring can be replaced as the replacement timing.
  • the piston ring should be replaced when the wear-resistant layer 2a is worn, but the wear identification material 4 has a limit of the amount of wear of the base material 1 that maintains the required sealing performance (for example, 1. It is also preferable to be able to further discriminate (about 5 to 2 mm). That is, it is also preferable that the wear identification material 4 is provided so as to penetrate into the base material 1 by a certain amount of depth.
  • the wear identification material 4 is worn when the base material 1 is worn by a certain amount without replacing the piston ring. Disappears, so that it can be identified from the appearance that the base material 1 has been worn by a certain amount.
  • the piston ring can identify the presence / absence of the familiar layer 2b and the wear-resistant layer 2a, or the wear state of the base material 1 from the appearance. Therefore, with this piston ring, it becomes easy to adjust the lubrication rate and determine the piston ring replacement timing, and the adjustment / replacement can be performed at an appropriate timing, which can contribute to safe operation. With this piston ring, it is possible to reduce the time and effort required to measure the wear status of engineers and sailors, and it is expected that the inspection time for the piston ring will be reduced. In addition, CBM (Condition Based Maintenance) becomes possible as a part of continuous monitoring of the appearance of the piston ring (cylinder condition monitor).
  • CBM Consumer Based Maintenance
  • FIG. 5A and 5B are enlarged views of a cross section taken along the line AA of FIG. 1 in the second embodiment, where FIG. 5A is a state without wear, FIG. 5B is a state in which the familiar layer is worn out, and FIG. The wear-resistant layer is worn, and (d) is a state in which the base metal is worn by a certain amount.
  • the material and overall shape of the base material 1, the material and the manufacturing method of the wear-resistant layer 2a and the familiar layer 2b refer to the description of the first embodiment, and are omitted here.
  • a wear identification recess 5 is provided on the outer peripheral surface of the base material 1.
  • the wear identification recess 5 can be formed by cutting or drilling the base material 1 before forming the wear resistant layer 2a and the familiar layer 2b. It is preferable that the wear identification recess 5 has a certain depth from the outer peripheral surface of the base material 1.
  • the wear identification recess 5 is preferably shaped to represent characters or figures when viewed from the outer peripheral side of the sliding surface 3 in order to facilitate identification of the wear state.
  • the wear-resistant layer 2a when the wear-resistant layer 2a is worn away, the base metal 1 appears as shown in FIG. 5 (c). At this time, the wear of the wear-resistant layer 2a can be identified from the appearance by the appearance of the wear identification recess 5. At this time, the piston ring can be replaced as the replacement timing.
  • the depth of the wear identification recess 5 is set to a certain amount from the outer peripheral surface of the base material 1, and as shown in FIG. 5D, the base material 1 has a constant amount without replacing the piston ring. Since the wear identification recess 5 disappears when worn, it is possible to identify from the appearance that the base material 1 has been worn by a certain amount.
  • the state in which the familiar layer 2b is worn out (FIG. 5 (b)) and the state in which the base metal 1 is worn by a certain amount (FIG. 5 (d)) are the states of the outer peripheral corners of the piston ring (the state of the R surface). It is also possible to distinguish between the wear-resistant layer 2a and the base material 1 by the difference between the two.
  • the base material can be changed depending on the visible shape of the wear identification recess 5.
  • the wear state of 1 can be identified.
  • a wear identification material made of a member different from the base material 1 may be fitted into the wear identification recess 5, and in this case, the appearance that the base material 1 is worn by a certain amount by disappearing the wear identification material. Can be identified from.
  • FIG. 6A is an enlarged perspective view and a vertical cross-sectional view of a main part showing the steps (groove processing) (a) to (d) for manufacturing the wear identification recess in the third embodiment.
  • FIG. 6B is an enlarged perspective view and a vertical sectional view of a main part showing a wear-resistant layer manufacturing step (groove processing) (e) and a familiar layer manufacturing step (f) in the third embodiment.
  • the wear identification recess 5 may be formed by grooving.
  • the material and overall shape of the base material 1, the material and the manufacturing method of the wear-resistant layer 2a and the familiar layer 2b refer to the description of the first embodiment, and are omitted here.
  • a wear identification recess 5 which is a groove is formed on the base material 1 by using a milling cutter 101.
  • the wear identification recess 5 is filled with the welding material 6 serving as the wear identification material 4.
  • the welding material 6 preferably has a color different from that of the wear-resistant layer 2a and the base material 1.
  • the welding material 6 in which the wear identification recess 5 is filled is polished so as to be flush with the outer peripheral surface of the base material 1.
  • a wear-resistant layer 2a is formed on the outer peripheral surface of the base metal 1.
  • a familiar layer 2b is formed on the outer peripheral surface of the wear resistant layer 2a.
  • (Fourth Embodiment) 7A is an enlarged view of a cross section taken along the line AA of FIG. 1 in the fourth embodiment, where (a) is a state without wear, (b) is a state where the familiar layer is worn, and (c). Indicates a state in which the familiar layer is worn, and (d) indicates a state in which the wear-resistant layer is worn.
  • 7B is an enlarged view of a cross section taken along the line AA of FIG. 1 in the fourth embodiment.
  • FIG. 7B is a state in which the wear-resistant layer is worn
  • FIG. 7B is a state in which the base metal is worn by a certain amount. Is shown.
  • the material and overall shape of the base material 1, the material and the manufacturing method of the wear-resistant layer 2a and the familiar layer 2b refer to the description of the first embodiment, and are omitted here.
  • a wear identification recess 5 is provided on the outer peripheral surface of the base material 1, and the depth is from the surface of the wear-resistant layer 2a to half the thickness of the wear-resistant layer 2a.
  • the first wear identification recess 5a is formed, and the second wear identification recess 5b is formed at a depth from the surface of the familiar layer 2b to half the thickness of the wear resistant layer 2a.
  • the wear identification recess 5 can be formed by cutting or drilling the base material 1 before forming the wear resistant layer 2a and the familiar layer 2b. It is preferable that the wear identification recess 5 has a certain depth from the outer peripheral surface of the base material 1.
  • the first wear identification recess 5a can be formed by cutting or drilling the wear resistant layer 2a before forming the familiar layer 2b.
  • the second wear identification recess 5b can be formed by cutting or drilling the familiar layer 2b.
  • a wear identification material made of a member different from the base material 1 may be fitted into the wear identification recess 5.
  • a wear identification material made of a member different from the wear resistant layer 2a may be fitted into the first wear identification recess 5a.
  • a wear identification material made of a member different from the familiar layer 2b may be fitted into the second wear identification recess 5b.
  • a wear identification material may be embedded in the wear resistant layer 2a and / or the familiar layer 2b. That is, the top of the wear identification material may be covered with the wear resistant layer 2a and / or the familiar layer 2b. Further, the bottom portion of the wear identification material does not have to reach the outer peripheral surface of the inner layer. The bottom is the inner layer, whether the top faces the outer or outer layer, or the top is inside the wear-resistant layer 2a and / or the familiar layer 2b and is covered by the wear-resistant layer 2a and / or the familiar layer 2b. Both the state of being in contact with the outer peripheral surface of the inner layer and the state of the bottom being separated from the outer peripheral surface of the inner layer are buried. In order to cover the top of the wear identification material with the wear resistant layer 2a and / or the familiar layer 2b, the wear resistant layer 2a and / or the familiar layer 2b is formed after the wear identification material is provided.
  • the wear identification recess 5, the first wear identification recess 5a and / or the second wear identification recess 5b have characters and figures viewed from the outer peripheral side of the sliding surface 3 in order to facilitate identification of the wear state. It is preferable that the shape is represented.
  • the depth of the wear identification recess 5 is set to a certain amount of depth from the outer peripheral surface of the base material 1, as shown in FIG. 7B (f), the base material 1 wears a certain amount without replacing the piston ring. Since the wear identification recess 5 or the wear identification material disappears at that time, it is possible to identify from the appearance that the base material 1 has been worn by a certain amount.
  • the fact that the familiar layer 2b is half worn can be identified from the appearance by the disappearance of the second wear identification recess 5b or the wear identification material. Further, the wear of the familiar layer 2b can be identified from the appearance by the appearance of the first wear identification recess 5a or the wear identification material and the difference in color between the familiar layer 2b and the wear resistant layer 2a. Further, it can be identified from the appearance that the wear-resistant layer 2a is half worn by the first wear identification recess 5a or the wear identification material disappearing. Further, the wear of the wear-resistant layer 2a can be identified from the appearance by the appearance of the wear identification recess 5 or the wear identification material.
  • the state in which the wear-resistant layer 2a is worn (FIG. 7A (d)) and the state in which the base metal 1 is worn by a certain amount (FIG. 7B (f)) are the states of the outer peripheral corners of the piston ring (R surface).
  • the wear-resistant layer 2a and the base material 1 can be distinguished from each other by the difference in the state).
  • the cross-sectional shape (cross section parallel to the sliding surface 3) of the wear identification recess 5, the first wear identification recess 5a and the second wear identification recess 5b is determined by the depth of the wear identification recesses 5, 5a and 5b. If it is changed, the wear state of the familiar layer 2b, the wear-resistant layer 2a, and the base material 1 can be identified by the visible shapes of the wear identification recesses 5, 5a, and 5b.
  • the color of the base material 1 is red and the color of the wear-resistant layer 2a is blue instead of the wear identification material 4 and the wear identification recess 5.
  • the color of the familiar layer 2b is colored (color-coded) as yellow or the like, the wear state of the familiar layer 2b and the wear-resistant layer 2a can be identified from the appearance by the color of the surface of the sliding surface 3. That is, if the yellow familiar layer 2b is worn out, the blue wear-resistant layer 2a appears on the surface of the sliding surface 3, and if the wear-resistant layer 2a is worn out, the red base material 1 is on the surface of the sliding surface 3. Appears in.
  • FIG. 8 is an enlarged view of a cross section taken along the line AA of FIG. 1 in the fifth embodiment, where (a) is a state without wear, (b) is a state in which the wear-resistant layer is worn, and (c). Indicates that the base metal has been worn by a certain amount.
  • the outer peripheral surface of the base material 1 is covered with the wear-resistant layer 2a of the wear-resistant material, and the surface of the wear-resistant layer 2a becomes the sliding surface 3 to the cylinder liner.
  • the wear-resistant layer 2a is a single layer in this embodiment, but is not limited to this, and a plurality of layers made of different materials may be laminated.
  • the base metal 1 is not particularly limited, but is made of various cast iron, cast steel, carbon steel for general structure, copper alloy, sintered alloy and the like.
  • the wear-resistant layer 2a is made of a wear-resistant material, for example, a ceramic material such as Cr 3 C 2 , Al 2 O 3 , WC, Cr 2 O 3 , ZrO 2 , and Cr, Co, Ni, Mo, Fe. Cermet to which a metal such as Cu or Cu is added is preferably used. Further, the wear-resistant layer 2a is formed by, for example, thermal spraying, electrolyte plating, or electrolyte plating, and an electrolyte plating layer containing ceramic particles. The thickness of the wear-resistant layer 2a is, for example, about 0.3 to 0.6 mm.
  • a wear identification recess 5 is provided on the outer peripheral surface of the base material 1. It is preferable that the wear identification material 4 is fitted in the wear identification recess 5.
  • the wear identification material 4 is made of a member different from the base material 1.
  • the wear identification material 4 preferably has a color different from that of the base material 1. This makes it easy to distinguish between the wear identification material 4 and the base material 1.
  • the wear identification material 4 does not necessarily have to be provided. When the wear identification material 4 is not provided, the wear identification recess 5 is opened on the outer peripheral surface of the base material 1.
  • the wear identification material 4 is provided in the base material 1 by allowing it to penetrate into the base material 1 by a certain amount of depth from the outer peripheral surface of the base material 1. If the wear identification material 4 is allowed to enter the base material 1 by a certain amount of depth from the outer peripheral surface of the base material 1, the top of the wear identification material 4 disappears when the base material 1 is worn by a certain amount. It can be identified from the appearance that the base material 1 has been worn by a certain amount.
  • the top of the wear identification material 4 is flush with the outer peripheral surface of the base material 1.
  • the top of the wear identification material 4 may face outward and be flush with the sliding surface 3.
  • the top of the wear identification material 4 forms a part of the sliding surface 3. Further, the top of the wear identification material 4 may be covered with the wear resistant layer 2a.
  • the wear identification material 4 is preferably made of a material having the same wear resistance as the material forming the wear resistant layer 2a and the material forming the base material 1, or having a low wear resistance. If the wear resistance of the wear identification material 4 is higher than that of the wear resistance layer 2a and the base material 1, only the wear identification material 4 remains when the wear resistance layer 2a and the base material 1 are worn, and protrudes from the sliding surface 3. This is because there is a risk that it will end up.
  • the wear identification recess 5 and the wear identification material 4 are preferably shaped to represent characters or figures when viewed from the outer peripheral side of the sliding surface 3 in order to facilitate identification of the wear state.
  • the cross-sectional shape (cross section parallel to the sliding surface 3) of the wear identification recess 5 and the wear identification material 4 depends on the depth of the wear identification recess 5 and the wear identification material 4 (depth from the initial sliding surface 3). It is also preferable to change it. As a result, when the wear-resistant layer 2a or the base material 1 wears, as shown in FIG. 8B, the base material 1 wears from the appearance due to the shape of the open end of the wear identification recess 5 and the top of the wear identification material 4. The state can be identified.
  • the piston ring should be replaced when the wear-resistant layer 2a is worn, but the wear identification material 4 has a limit of the amount of wear of the base material 1 that maintains the required sealing performance (for example, 1. It is also preferable to be able to further discriminate (about 5 to 2 mm). That is, it is also preferable that the wear identification material 4 is provided so as to penetrate into the base material 1 by a certain amount of depth.
  • the depth of the wear identification recess 5 is set to a certain amount from the outer peripheral surface of the base material 1, as shown in FIG. 8C, the base material 1 wears a certain amount without replacing the piston ring. When this is done, the wear identification recess 5 and / or the wear identification material 4 disappears. At this time, the wear of the base material 1 by a certain amount can be identified from the appearance by the wear identification recess 5 and / or the wear identification material 4 disappearing.
  • this piston ring can identify the wear status of the base material 1 from the appearance. Therefore, with this piston ring, it becomes easy to adjust the lubrication rate and determine the piston ring replacement timing, and the adjustment / replacement can be performed at an appropriate timing, which can contribute to safe operation. With this piston ring, it is possible to reduce the time and effort required to measure the wear status of engineers and sailors, and it is expected that the inspection time for the piston ring will be reduced. In addition, CBM (Condition Based Maintenance) is possible as part of the constant monitoring of the appearance of the piston ring (cylinder condition monitor).
  • CBM Consumer Based Maintenance
  • FIG. 9 is an example of the manufacturing process of the fifth embodiment, and is an enlarged perspective view and a vertical sectional view of a main part showing the manufacturing steps (groove processing) (a) to (e) of the wear identification recess and the wear resistant layer. be.
  • the wear identification recess 5 may be formed by grooving.
  • a wear identification recess 5 which is a groove is formed on the base material 1 by using a milling cutter 101.
  • the wear identification recess 5 is filled with the welding material 6 serving as the wear identification material 4.
  • the welding material 6 preferably has a color different from that of the wear-resistant layer 2a and the base material 1.
  • the welding material 6 in which the wear identification recess 5 is filled is polished so as to be flush with the outer peripheral surface of the base material 1.
  • a wear-resistant layer 2a is formed on the outer peripheral surface of the base metal 1.
  • (Sixth Embodiment) 10 is an enlarged view of a cross section taken along the line AA of FIG. 1 in the sixth embodiment, where (a) is a state without wear, (b) is a state where the wear-resistant layer is worn, and (c). Indicates that the base metal has been worn by a certain amount.
  • the material and overall shape of the base material 1, the material and the manufacturing method of the wear-resistant layer 2a refer to the description of the fifth embodiment, and are omitted here.
  • the outer peripheral surface of the base material 1 is covered with the wear-resistant layer 2a of the wear-resistant material, and the surface of the wear-resistant layer 2a becomes the sliding surface 3 to the cylinder liner.
  • the wear-resistant layer 2a is a single layer in this embodiment, but is not limited to this, and a plurality of layers made of different materials may be laminated.
  • a wear identification recess 5 is provided on the outer peripheral surface of the base material 1 from the outer peripheral surface of the base material 1 to a certain depth. Further, a first wear identification material 4a made of a member different from the base material 1 is fitted in the wear identification recess 5.
  • the wear identification recess 5 is opened on the surface of the wear resistant layer 2a.
  • a second wear identification material 4b made of a member different from the wear resistant layer 2a is embedded in the wear resistant layer 2a.
  • the second wear identification material 4b is integrated with the first wear identification material 4a to form the wear identification material 4. That is, the wear identification material 4 extends from the inside of the wear identification recess 5 to the inside of the wear resistant layer 2a.
  • the top of the wear identification material 4 faces outward and is flush with the sliding surface 3, and the top of the wear identification material 4 forms a part of the sliding surface 3.
  • the wear identification material 4 may be inside the wear resistant layer 2a and covered with the wear resistant layer 2a.
  • the top is inside the wear-resistant layer 2a and is covered by the wear-resistant layer 2a. Including the state of being.
  • the wear resistance layer 2a is formed after the wear identification material 4 is provided.
  • the wear identification material 4 is preferably made of a material having the same wear resistance as the material forming the wear resistant layer 2a and the material forming the base material 1, or having a low wear resistance. If the wear resistance of the wear identification material 4 is higher than that of the wear resistance layer 2a and the base material 1, only the wear identification material 4 remains when the wear resistance layer 2a and the base material 1 are worn, and protrudes from the sliding surface 3. This is because there is a risk that it will end up.
  • the wear identification recess 5 and the wear identification material 4 are preferably shaped to represent characters or figures when viewed from the outer peripheral side of the sliding surface 3 in order to facilitate identification of the wear state.
  • the cross-sectional shape (cross section parallel to the sliding surface 3) of the wear identification recess 5 and the wear identification material 4 depends on the depth of the wear identification recess 5 and the wear identification material 4 (depth from the initial sliding surface 3). It is preferable to change it. As a result, when the wear-resistant layer 2a is worn, it can be identified that the wear-resistant layer 2a is worn by the shape of the open end of the wear identification recess 5 and / or the top of the wear identification material 4.
  • the wear identification recess 5 and / or the wear identification material 4 disappears as shown in FIG. 10 (c). At this time, the fact that the base material 1 has reached a certain amount can be identified from the appearance by the disappearance of the wear identification recess 5 and / or the wear identification material 4.
  • the wear identification material 4 When the wear identification material 4 is covered with the wear resistant layer 2a, the state where there is no wear (FIG. 10 (a)) and the state where the base material 1 is worn by a certain amount (FIG. 10 (c)) are referred to as a state where there is no wear (FIG. 10 (a)).
  • the wear-resistant layer 2a and the base metal 1 can be distinguished from each other by the difference in the state of the outer peripheral corner portion (the state of the R surface) of the piston ring.
  • first wear identification material 4a and the second wear identification material 4b are regarded as an integral member to form the wear identification material 4, but these first and second wear identification materials are used.
  • the materials 4a and 4b may be separate members, and in this case, they may be provided at different positions when viewed from the outer peripheral side.
  • (7th Embodiment) 11 is an enlarged view of a cross section taken along the line AA of FIG. 1 in the seventh embodiment, where (a) is a state without wear, (b) is a state where the wear-resistant layer is worn, and (c). Indicates a state in which the wear-resistant layer is worn, and (d) indicates a state in which the base metal is worn by a certain amount.
  • the material and overall shape of the base material 1, the material and the manufacturing method of the wear-resistant layer 2a refer to the description of the fifth embodiment, and are omitted here.
  • the outer peripheral surface of the base material 1 is covered with the wear-resistant layer 2a of the wear-resistant material, and the surface of the wear-resistant layer 2a becomes the sliding surface 3 to the cylinder liner.
  • the wear-resistant layer 2a is a single layer in this embodiment, but is not limited to this, and a plurality of layers made of different materials may be laminated.
  • a first wear identification recess 5a is provided on the outer peripheral surface of the base material 1 in a constant amount from the outer peripheral surface of the base material 1 to the outer peripheral surface of the base material 1. It is provided to the depth. Further, a first wear identification material 4a made of a member different from the base material 1 is fitted in the first wear identification recess 5a. However, the first wear identification material 4a does not necessarily have to be provided. When the first wear identification material 4a is not provided, the first wear identification recess 5a is opened on the outer peripheral surface of the base material 1.
  • the top of the first wear identification material 4a is flush with the outer peripheral surface of the base material 1.
  • the top of the first wear identification material 4a may face outward and be flush with the sliding surface 3.
  • the top of the first wear identification material 4a forms a part of the sliding surface 3.
  • the top of the first wear identification material 4a may be inside the wear resistant layer 2a and covered with the wear resistant layer 2a. In order to cover the top of the first wear identification material 4a with the wear resistance layer 2a, the wear resistance layer 2a is formed after the first wear identification material 4a is provided.
  • the wear-resistant layer 2a is provided with a second wear-identifying recess 5b over a predetermined depth from the surface of the wear-resistant layer 2a.
  • the second wear identification recess 5b is provided at a position different from that of the first wear identification recess 5a of the base material 1 (a position that does not overlap in the radial direction of the piston ring).
  • a second wear identification material 4b made of a member different from the wear resistant layer 2a is fitted into the second wear identification recess 5b and is embedded in the wear resistant layer 2a.
  • the second wear identification material 4b is a member separate from the first wear identification material 4a in the first wear identification recess 5a.
  • the second wear identification material 4b does not necessarily have to be provided.
  • the second wear identification recess 5b is opened on the surface of the wear resistant layer 2a.
  • the top of the second wear identification material 4b faces outward and is flush with the surface of the wear resistant layer 2a.
  • the top of the second wear identification material 4b forms a part of the sliding surface 3.
  • the top of the second wear identification material 4b may be covered with the wear resistant layer 2a.
  • the bottom portion of the second wear identification material 4b is in contact with the outer peripheral surface of the base material 1, and the top portion faces outward and is flush with the sliding surface 3.
  • the top is inside the wear-resistant layer 2a and is covered by the wear-resistant layer 2a, or the bottom of the second wear identification material 4b is separated from the outer peripheral surface of the base material 1 and the top faces outward.
  • the wear resistance layer 2a is formed after the second wear identification material 4b is provided.
  • the first and second wear identification materials 4a and 4b are preferably made of a material having the same wear resistance as the material forming the wear resistant layer 2a and the material forming the base material 1, or having a low wear resistance. If the wear resistance of the first and second wear identification materials 4a and 4b is higher than that of the wear resistant layer 2a and the base material 1, the first and second wears when the wear resistant layer 2a and the base material 1 are worn. This is because only the identification materials 4a and 4b may remain and protrude from the sliding surface 3.
  • the first and second wear identification recesses 5a and 5b, and the first and second wear identification materials 4a and 4b have characters and figures viewed from the outer peripheral side of the sliding surface 3 in order to facilitate identification of the wear state. It is preferable that the shape represents.
  • the cross-sectional (cross-section parallel to the sliding surface 3) shape of the first and second wear identification recesses 5a and 5b and the first and second wear identification materials 4a and 4b is the first and second wear identification recesses. It is also preferable to change the depth according to the depths of the 5a and 5b, the first and second wear identification materials 4a and 4b (the depth from the initial sliding surface 3). As a result, when the wear-resistant layer 2a and the base material 1 are worn, the appearance is changed by the shapes of the openings of the first and second wear identification recesses 5a and 5b and the tops of the first and second wear identification materials 4a and 4b. It is possible to identify the wear state of the wear-resistant layer 2a and the base material 1 from the above.
  • the outer peripheral surface of the base material 1 appears as shown in FIG. 11 (c), and the first wear identification recess 5a and / or the first wear The identification material 4a appears.
  • the piston ring can be replaced as the replacement timing.
  • the first wear identification recess 5a and / or the first wear identification material 4a disappears as shown in FIG. 11D.
  • the fact that the base material 1 has reached a certain amount can be identified from the appearance by the disappearance of the first wear identification recess 5a and / or the first wear identification material 4a.
  • the state in which the wear-resistant layer 2a is worn (FIG. 11 (b)) and the state in which the base metal 1 is worn by a certain amount (FIG. 11 (d)) are the states of the outer peripheral corners of the piston ring (the state of the R surface). ), It is also possible to distinguish between the wear-resistant layer 2a and the base material 1.
  • (8th Embodiment) 12 is an enlarged view of a cross section taken along the line AA of FIG. 1 in the eighth embodiment, where (a) is a state without wear, (b) is a state where the wear-resistant layer is worn, and (c). Indicates that the wear-resistant layer is worn out.
  • the material and overall shape of the base material 1, the material and the manufacturing method of the wear-resistant layer 2a refer to the description of the fifth embodiment, and are omitted here.
  • the outer peripheral surface of the base material 1 is covered with the wear-resistant layer 2a of the wear-resistant material, and the surface of the wear-resistant layer 2a becomes the sliding surface 3 to the cylinder liner.
  • the wear-resistant layer 2a is a single layer in this embodiment, but is not limited to this, and a plurality of layers made of different materials may be laminated.
  • the wear-resistant layer 2a is provided with a wear-identifying recess 5 extending from the surface of the wear-resistant layer 2a to the outer peripheral surface of the base material 1.
  • a wear identification material 4 made of a member different from the wear-resistant layer 2a is fitted into the wear-identifying recess 5, and is embedded in the wear-resistant layer 2a.
  • the wear identification material 4 does not necessarily have to be provided.
  • the wear identification recess 5 is opened on the surface of the wear resistant layer 2a.
  • the top of the wear identification material 4 faces outward and is flush with the surface of the wear resistant layer 2a.
  • the top of the wear identification material 4 forms a part of the sliding surface 3.
  • the top of the wear identification material 4 may be covered with the wear resistant layer 2a.
  • the bottoms of the wear identification recess 5 and the wear identification material 4 do not have to reach the outer peripheral surface of the base material 1.
  • the bottom is the outer periphery of the base material 1 regardless of whether the top faces the outside and is flush with the sliding surface 3 or the top is inside the wear-resistant layer 2a and is covered by the wear-resistant layer 2a. Both the state of being in contact with the surface and the state of the bottom being separated from the outer peripheral surface of the base material 1 are buried.
  • the wear resistance layer 2a is formed after the wear identification material 4 is provided.
  • the wear identification material 4 is preferably made of a material having the same wear resistance as the material forming the wear resistant layer 2a or having a low wear resistance. This is because if the wear resistance of the wear identification material 4 is higher than that of the wear resistance layer 2a, only the wear identification material 4 may remain and protrude from the sliding surface 3 when the wear resistance layer 2a is worn. ..
  • the wear identification recess 5 and the wear identification material 4 are preferably shaped to represent characters or figures when viewed from the outer peripheral side of the sliding surface 3 in order to facilitate identification of the wear state.
  • the cross-sectional shape (cross section parallel to the sliding surface 3) of the wear identification recess 5 and the wear identification material 4 depends on the depth of the wear identification recess 5 and the wear identification material 4 (depth from the initial sliding surface 3). It is also preferable to change it. As a result, when the wear-resistant layer 2a is worn, the wear state of the wear-resistant layer 2a can be identified from the appearance by the shape of the open end of the wear identification recess 5 and / or the top of the wear identification material 4.
  • the wear identification recess 5 and / or the wear identification material 4 disappears, and the outer peripheral surface of the base material 1 appears.
  • the wear of the wear-resistant layer 2a can be identified from the appearance by the disappearance of the wear identification recess 5 and / or the wear identification material 4.
  • the piston ring can be replaced as the replacement timing.
  • the wear identification material 4 When the wear identification material 4 is covered with the wear-resistant layer 2a, the state without wear (FIG. 12 (a)) and the state where the wear-resistant layer 2a is worn (FIG. 12 (c)) are the pistons.
  • the wear-resistant layer 2a and the base metal 1 can be distinguished from each other by the difference in the state of the outer peripheral corner portion of the ring (the state of the R surface).
  • each piston ring in which only the wear-resistant layer (single layer) is formed the color of the base material 1 is red and the color of the wear-resistant layer 2a is blue or yellow instead of the wear identification material 4 and the wear identification recess 5.
  • coloring color-coding
  • the wear state of the wear-resistant layer 2a can be identified from the appearance by the color of the surface of the sliding surface 3. That is, when the blue or yellow wear-resistant layer 2a is worn away, the red base material 1 appears on the surface of the sliding surface 3.
  • the piston ring described above is a position that can be seen from the outside (a position that is easy to see) when the engine is stopped and the piston is moved downward so that the sliding surface 3 of the piston ring can be seen from the outside.
  • a wear identification recess 5 and / or a wear identification material 4 can be provided at this location.
  • the wear identification recess 5 and / or the wear identification material 4 can be seen from the outside (a position that is easy to see). ) Can be.
  • the wear identification recess 5 and / or the wear identification material 4 may be provided over the entire circumference of the sliding surface 3.
  • the identification of the worn state of the piston ring has not been easy in the past because it is performed by the crew of the ship who does not have sufficient knowledge about the piston ring in the engine room of the ship which is not sufficiently bright.
  • the piston ring according to the present invention even a crew member who does not have knowledge about the piston ring in a dark engine room can easily identify the wear state of the piston ring from the appearance by the wear identification recess 5 or the wear identification material 4. This makes it easier to adjust the lubrication rate and determine the piston ring replacement timing, and it is possible to carry out adjustment and replacement at an appropriate timing, which contributes to safe operation.
  • Base material Outer peripheral layer 2a Abrasion resistant layer 2b Familiar layer 3 Sliding surface 4 Abrasion identification material 4a First wear identification material 4b Second wear identification material 5 Wear identification recess 5a First wear identification recess 5b Second Wear identification recess 6 Welding material 101 Milling cutter

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

Le but de la présente invention est de fournir un segment de piston qui possède, sur une surface circonférentielle externe d'un matériau de base de celui-ci, une couche résistante à l'usure formée d'un matériau résistant à l'usure et qui permet de déterminer facilement l'état d'usure de la couche résistante à l'usure à partir de son aspect extérieur. Ce segment de piston comporte une surface de glissement 3 comprenant un stratifié d'une couche résistant à l'usure 2a d'un matériau résistant à l'usure et d'une couche d'affinité 2b qui sont formées à fleur l'une de l'autre sur une surface circonférentielle externe d'un matériau de base 1. La surface circonférentielle externe du matériau de base 1 est pourvue d'un élément de détermination d'usure 4 formé d'un matériau différent du matériau de base 1. De préférence, une partie la plus à l'extérieur de l'élément de détermination d'usure 4 est à fleur de la surface de glissement 3.
PCT/JP2021/044800 2020-12-04 2021-12-06 Segment de piston WO2022118988A1 (fr)

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JP2022567022A JPWO2022118988A1 (fr) 2020-12-04 2021-12-06
CN202180080763.XA CN116583665A (zh) 2020-12-04 2021-12-06 活塞环

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61187608A (ja) * 1985-02-15 1986-08-21 Koushinraido Hakuyo Suishin Plant Gijutsu Kenkyu Kumiai 内燃機関用ピストンリングの摩耗検出方法および内燃機関用ピストンリング
JPH02150574A (ja) * 1988-11-30 1990-06-08 Riken Corp ピストンリング
JPH1151187A (ja) * 1997-08-04 1999-02-23 Teikoku Piston Ring Co Ltd ピストンリング
JP2001027152A (ja) * 1999-07-15 2001-01-30 Riken Corp 内燃機関用ピストンリング及びその製造方法
JP2016517937A (ja) * 2013-04-04 2016-06-20 フェデラル−モーグル ブルシェイド ゲーエムベーハーＦｅｄｅｒａｌ−Ｍｏｇｕｌ Ｂｕｒｓｃｈｅｉｄ Ｇｍｂｈ 摩耗インジケータを備えるピストンリング

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61187608A (ja) * 1985-02-15 1986-08-21 Koushinraido Hakuyo Suishin Plant Gijutsu Kenkyu Kumiai 内燃機関用ピストンリングの摩耗検出方法および内燃機関用ピストンリング
JPH02150574A (ja) * 1988-11-30 1990-06-08 Riken Corp ピストンリング
JPH1151187A (ja) * 1997-08-04 1999-02-23 Teikoku Piston Ring Co Ltd ピストンリング
JP2001027152A (ja) * 1999-07-15 2001-01-30 Riken Corp 内燃機関用ピストンリング及びその製造方法
JP2016517937A (ja) * 2013-04-04 2016-06-20 フェデラル−モーグル ブルシェイド ゲーエムベーハーＦｅｄｅｒａｌ−Ｍｏｇｕｌ Ｂｕｒｓｃｈｅｉｄ Ｇｍｂｈ 摩耗インジケータを備えるピストンリング

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