Carbon scraping device and engine
By setting grooves and protrusions between the scraping ring and the fire shore, the problem of carbon deposit weakening the scraping ring and poor heat transfer is solved, and the rapid removal of carbon deposits and effective heat transfer is achieved, reducing the engine failure rate.
Patent Information
- Application Number
- CN202422594493.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-25
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-10-25
AI Technical Summary
In the prior art, after the piston firepower is deposited on the shore of the carbon scraping ring, the carbon scraping effect of the carbon scraping ring is weakened, resulting in an increase in the risk of cylinder pulling. At the same time, the piston heat transfer is poor, resulting in temperature exceeding the limit and causing failure.
A number of grooves and protrusions along the center line of the cylinder bore are arranged between the carbon scraping ring and the fire shore. The grooves and protrusions cooperate to achieve rapid removal of carbon deposits and accelerate heat transfer by increasing the contact area.
Effectively prevent carbon deposits from consolidating, reduce the risk of cylinder pulling, improve carbon deposit cleaning efficiency, reduce friction heat, and reduce piston failure rate.
Smart Images
Figure CN223120025U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of engines, and particularly to a carbon scraping device and an engine. Background Art
[0002] In the prior art, a piston is slidably arranged in a cylinder liner, and the surface of the piston's fire deck is a smooth plane. The inner surface of the carbon scraping ring cooperating with the piston's fire deck is also a smooth plane. During the operation of the carbon scraping device, after carbon deposition occurs on the piston's fire deck, the carbon deposit is continuously squeezed by the piston and the carbon scraping ring, and thus solidifies on the surface of the fire deck. The carbon scraping effect of the carbon scraping ring will be continuously weakened, increasing the risk of cylinder scoring. In addition, the heat generated by the piston is transmitted to the piston ring through the piston body. If the temperature in the cylinder liner rises abnormally and the heat transfer speed of the piston body cannot meet the requirements, resulting in the temperature of the fire deck at the top of the piston exceeding the allowable temperature of the piston, the piston will malfunction. Summary of the Utility Model
[0003] In view of this, the embodiments of the present utility model provide a carbon scraping device and an engine. In this carbon scraping device, the carbon scraping ring can timely remove the carbon deposit on the surface of the fire deck and also improve the heat dissipation efficiency of the piston's fire deck.
[0004] In a first aspect, the embodiments of the present utility model provide a carbon scraping device, which includes: a cylinder liner, a piston, and a carbon scraping ring; the cylinder liner has a cylinder bore, the piston is slidably arranged in the cylinder bore, the carbon scraping ring is arranged on the inner wall of the cylinder liner, and the fire deck at the end of the piston penetrates through the carbon scraping ring, wherein: a plurality of grooves and at least one set of protruding portions are arranged between the carbon scraping ring and the fire deck of the piston. The extending direction of the grooves is the same as the direction of the center line of the cylinder bore. The at least one set of protruding portions cooperate with the plurality of grooves, and the protruding portions can slide along the extending direction of the grooves.
[0005] In this embodiment, grooves extending along the direction of the center line of the cylinder bore are arranged on the surface of the fire deck or the carbon scraping ring, and at least one set of protruding portions cooperating with the grooves are arranged on the surface of the carbon scraping ring or the fire deck. The protruding portions or the grooves can divide the smooth surface of the fire deck into multiple concave or convex regions, and the grooves or the protruding portions can divide the smooth surface of the carbon scraping ring into multiple convex or concave regions. During the process that the piston reciprocates in the cylinder bore along the direction of the center line of the cylinder bore, the carbon deposit formed on the surface of the fire deck can be quickly scraped off by the convex or concave regions formed on the carbon scraping ring under the cooperation of the protruding portions and the grooves, preventing the carbon deposit from solidifying on the surface of the fire deck and reducing the risk of cylinder scoring. In addition, the extending direction of the grooves is the same as the direction of the center line of the cylinder bore. Each time the piston moves along the direction of the center line of the cylinder bore, the carbon deposit on the surface of the fire deck can be cleaned, which can further improve the efficiency of carbon deposit cleaning.
[0006] It is worth mentioning that grooves or protrusions are provided on the surface of the fire shore. When the fire shore contacts the inner wall of the cylinder liner, compared with the smooth plane of the surface of the fire shore, the method of providing grooves or protrusions can reduce the friction area with the inner wall of the cylinder liner, thereby reducing the heat generated by the friction between the fire shore and the cylinder liner. When the fire shore moves to the carbon scraping ring, the grooves and protrusions between the fire shore and the carbon scraping ring cooperate to increase the contact area between the fire shore and the carbon scraping ring, enabling the temperature at the fire shore to be quickly transferred through the carbon scraping ring, thus quickly cooling the fire shore and reducing the probability of piston failure.
[0007] In one embodiment, the plurality of grooves are formed on the inner wall of the carbon scraping ring, and the plurality of grooves are evenly distributed along the circumferential direction of the carbon scraping ring.
[0008] In one embodiment, the at least one set of protrusions is formed on the surface of the fire shore, and the plurality of protrusions included in the at least one set of protrusions are evenly distributed along the circumferential direction of the fire shore.
[0009] In one embodiment, the at least one set of protrusions includes a first set of protrusions, a second set of protrusions, and a third set of protrusions arranged along the central axis direction of the cylinder bore. The first set of protrusions includes a plurality of first protrusions evenly distributed along the circumferential direction of the fire shore, the second set of protrusions includes a plurality of second protrusions evenly distributed along the circumferential direction of the fire shore, and the third set of protrusions includes a plurality of third protrusions evenly distributed along the circumferential direction of the fire shore. The first protrusions, the second protrusions, and the third protrusions are all used to cooperate with the grooves.
[0010] In one embodiment, along the central axis direction of the cylinder bore, the plurality of first protrusions and the plurality of third protrusions coincide, and one second protrusion is arranged between two adjacent first protrusions and two adjacent third protrusions.
[0011] In one embodiment, along the central axis direction of the cylinder bore, the central lines of the plurality of first protrusions and the central lines of the plurality of third protrusions are arranged parallel to the central axis of the cylinder bore.
[0012] In one embodiment, along the central axis direction of the cylinder bore, the included angle between the central lines of the plurality of second protrusions and the central axis of the cylinder bore is 3° to 5°.
[0013] In one embodiment, the shape of the protrusion is cylindrical, square, or rhombic, and the shape of the groove is a U-shaped groove or a rectangular groove.
[0014] In one embodiment, the plurality of grooves are formed on the surface of the firing bank, and the plurality of grooves are evenly distributed along the circumferential direction of the firing bank. The at least one set of protrusions is formed on the inner wall of the carbon scraping ring, and the plurality of protrusions included in the at least one set of protrusions are evenly distributed along the circumferential direction of the carbon scraping ring.
[0015] In one embodiment, an installation groove is provided in a circumferential direction on the inner wall of the cylinder liner, and the carbon scraping ring is snap-fitted in the installation groove.
[0016] In a second aspect, the present application further provides an engine, which includes the carbon scraping device according to any one of the technical solutions in the first aspect. The failure rate of the engine with this carbon scraping device is relatively low. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a partial structural schematic diagram of the carbon scraping device provided by an embodiment of the present invention;
[0018] Figure 2 It is a structural schematic diagram of a piston in the carbon scraping device provided by an embodiment of the present invention;
[0019] Figure 3 It is Figure 2 a partial enlarged view of;
[0020] Figure 4 It is a structural schematic diagram of the carbon scraping ring in the carbon scraping device provided by an embodiment of the present invention;
[0021] Figure 5 It is a schematic diagram of the arrangement of each protrusion on the piston provided by an embodiment of the present invention;
[0022] Figure 6 It is a schematic diagram of the angle formed by the second protrusion on the piston and the central axis of the piston provided by an embodiment of the present invention;
[0023] Figure 7 It is Figure 4 a partial enlarged view of;
[0024] Figure 8 It is Figure 4 a partial enlarged view of.
[0025] Reference numerals: 10 - cylinder liner; 20 - piston; 21 - firing bank; 210 - first set of protrusions; 2100 - first protrusion; 211 - second set of protrusions; 2110 - second protrusion; 212 - third set of protrusions; 2120 - third protrusion; 30 - carbon scraping ring; 31 - groove. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.
[0027] Next, a carbon scraping device provided by an embodiment of the present invention will be specifically described in conjunction with the accompanying drawings.
[0028] Figure 1 It is a partial structural schematic diagram of the carbon scraping device provided by an embodiment of the present invention; Figure 2 It is a structural schematic diagram of the piston 20 in the carbon scraping device provided by an embodiment of the present invention; Figure 3 is Figure 2 a partial enlarged view of; Figure 4 It is a structural schematic diagram of the carbon scraping ring 30 in the carbon scraping device provided by an embodiment of the present invention. Figure 1 The first direction in is the central line direction of the cylinder bore. Referring to Figure 1 , Figure 2 , Figure 3 and Figure 4 , the carbon scraping device includes a cylinder liner 10, a piston 20 and a carbon scraping ring 30. The cylinder liner 10 has a cylinder bore. The piston 20 is arranged in the cylinder bore and can reciprocate along the extending direction of the cylinder bore. The carbon scraping ring 30 is arranged on the inner wall of the cylinder liner 10, and the fire deck 21 at the end of the piston 20 can pass through the carbon scraping ring 30. Among them, a plurality of grooves 31 and at least one set of protrusions are arranged between the carbon scraping ring 30 and the fire deck 21. The extending direction of the grooves 31 is the same as the central line direction of the cylinder bore. At least one set of protrusions cooperate with the plurality of grooves 31, and the protrusions can slide along the extending direction of the grooves 31. During the process of the piston 20 reciprocating along the central line direction of the cylinder bore in the cylinder bore, the carbon deposits formed on the surface of the fire deck 21 can be quickly scraped off under the cooperation of the protrusions and the grooves 31, preventing the carbon deposits from solidifying on the surface of the fire deck 21 and reducing the risk of cylinder scoring. In addition, the extending direction of the grooves 31 is the same as the central line direction of the cylinder bore. Each time the piston 20 moves along the central line direction of the cylinder bore, the carbon deposits on the surface of the fire deck 21 can be cleaned, which can further improve the efficiency of carbon deposit cleaning.
[0029] It is worth mentioning that grooves 31 or protrusions are provided on the surface of the fire shore 21. When the fire shore 21 contacts the inner wall of the cylinder liner 10, compared with the smooth plane of the surface of the fire shore 21, the method of providing grooves 31 or protrusions can reduce the friction area with the inner wall of the cylinder liner 10, and thus reduce the heat generated by the friction between the fire shore 21 and the cylinder liner 10. When the fire shore 21 moves to the carbon scraping ring 30, the grooves 31 and protrusions between the fire shore 21 and the carbon scraping ring 30 cooperate to increase the contact area between the fire shore 21 and the carbon scraping ring 30, so that the temperature at the fire shore 21 can be quickly transmitted through the carbon scraping ring 30, thereby quickly cooling the fire shore 21 and reducing the probability of failure of the piston 20.
[0030] In one embodiment, a plurality of grooves 31 can be formed on the inner wall of the carbon scraping ring 30. The plurality of grooves 31 are evenly distributed along the circumferential direction of the carbon scraping ring 30. At least one group of protrusions is formed on the surface of the fire shore 21, and the plurality of protrusions included in at least one group of protrusions are evenly distributed along the circumferential direction of the fire shore 21. During the process of the at least one group of protrusions reciprocatingly moving along the central line direction of the cylinder bore with the piston 20, the plurality of grooves 31 are located on the moving path of the at least one group of protrusions, so that the plurality of grooves 31 cooperate with the at least one group of protrusions, and the space between two adjacent grooves 31 can rub against the part of the fire shore 21 other than the at least one group of protrusions to remove the carbon deposits on the surface of the fire shore 21.
[0031] Among them, the at least one group of protrusions can only include the first group of protrusions 210. The first group of protrusions 210 can include a plurality of first protrusions 2100. The plurality of first protrusions 2100 can be evenly distributed along the circumferential direction of the fire shore 21, and the center line of the first protrusion 2100 can be arranged parallel to the center line of the cylinder bore. In some other embodiments, the center lines of the plurality of first protrusions 2100 included in the first group of protrusions 210 can also be arranged at an angle with the center line of the cylinder bore. The space between two adjacent grooves 31 can rub against the part of the fire shore 21 other than the first group of protrusions 210 to remove the carbon deposits on the surface of the fire shore 21.
[0032] At least one set of protrusions may also include only the first set of protrusions 210 and the second set of protrusions 211. The first set of protrusions 210 and the second set of protrusions 211 may be arranged at intervals along the central axis direction of the cylinder bore. The first set of protrusions 210 includes a plurality of first protrusions 2100, and the plurality of first protrusions 2100 may be evenly distributed along the circumferential direction of the fire deck 21. The second set of protrusions 211 includes a plurality of second protrusions 2110, and the plurality of second protrusions 2110 may also be evenly distributed along the circumferential direction of the fire deck 21. Along the central axis direction of the cylinder bore, a second protrusion 2110 is provided between two adjacent first protrusions 2100. At this time, the first protrusions 2100 and the second protrusions 2110 cooperate with different grooves 31, or, along the central axis direction of the cylinder bore, the first protrusions 2100 and the second protrusions 2110 are arranged in one-to-one correspondence.
[0033] In one embodiment, at least one set of protrusions includes a first set of protrusions 210, a second set of protrusions 211, and a third set of protrusions 212. The first set of protrusions 210, the second set of protrusions 211, and the third set of protrusions 212 may be arranged at intervals along the central axis direction of the cylinder bore. The first set of protrusions 210 includes a plurality of first protrusions 2100 evenly distributed along the circumferential direction of the fire deck 21. The second set of protrusions 211 includes a plurality of second protrusions 2110 evenly distributed along the circumferential direction of the fire deck 21. The third set of protrusions 212 includes a plurality of third protrusions 2120 evenly distributed along the circumferential direction of the fire deck 21. The first protrusions 2100, the second protrusions 2110, and the third protrusions 2120 are all used to cooperate with the grooves 31. At this time, along the central axis direction of the cylinder bore, the plurality of first protrusions 2100, the plurality of second protrusions 2110, and the plurality of third protrusions 2120 may be arranged in one-to-one correspondence, that is, the number of the first protrusions 2100 is the same as the number of the second protrusions 2110 and the third protrusions 2120, or, the number of the first protrusions 2100 may also be different from the number of the second protrusions 2110 and the third protrusions 2120. Specifically, it can be determined according to actual needs.
[0034] In one embodiment, along the central axis direction of the cylinder bore, the plurality of first protrusions 2100 and the plurality of third protrusions 2120 coincide, and a second protrusion 2110 is provided between two adjacent first protrusions 2100 and two adjacent third protrusions 2120. In this way, the first set of protrusions 210, the second set of protrusions 211, and the third set of protrusions 212 can form a plurality of concave regions on the surface of the fire deck 21. When the part between the grooves 31 on the carbon scraping ring cooperates with the plurality of concave regions, it can more easily remove the carbon deposits formed on the fire deck 21. Moreover, the large number of protrusions can also increase the contact area between the fire deck 21 and the carbon scraping ring, improving the heat dissipation efficiency.
[0035] At least one set of protrusions can also include other forms, as long as it can cooperate with the groove 31 to remove the carbon deposits on the surface of the fire shore 21 and can also improve the heat dissipation efficiency.
[0036] Figure 5 The schematic diagram of the arrangement of each protrusion on the piston provided by the embodiment of the present invention. Refer to Figure 3 and Figure 5 , when at least one set of protrusions includes the first set of protrusions 210, the second set of protrusions 211 and the third set of protrusions 212, along the direction of the central axis of the cylinder bore, the central axes of the plurality of first protrusions 2100 and the central axes of the plurality of third protrusions 2120 are arranged parallel to the central axis of the cylinder bore. In this way, a relative first protrusion 2100, a third protrusion 2120 and two second protrusions 2110 can be arranged in a rhombus. The included angle α between the connection line of the midpoints of one first protrusion 2100 and the midpoints of the two second protrusions 2110 is 100° to 150°.
[0037] Figure 6 The schematic diagram of the included angle formed by the second protrusion on the piston and the central axis of the piston provided by the embodiment of the present invention. Refer to Figure 2 , Figure 3 , Figure 4 and Figure 6 , in one embodiment, along the direction of the central axis of the cylinder bore, the included angle β between the central axes of the plurality of second protrusions 2110 and the central axis of the cylinder bore is 3° to 5°. In this way, when setting the second protrusions 2110, the process requirements for the second protrusions 2110 are relatively low, and the yield of the product can be improved. In addition, when the included angle β between the central axis of the second protrusion 2110 and the central axis of the cylinder bore is 3° to 5°, the size of the groove 31 cooperating with the second protrusion 2110 can be adjusted accordingly.
[0038] Figure 7 is Figure 4 partial enlarged view; Figure 8 is Figure 4 partial enlarged view. Refer to Figure 3 , Figure 7 and Figure 8 , in the above embodiment, the shape of the protrusion can be various, such as: the protrusion can be cylindrical, square or rhombic. The formation of the groove 31 can be a U-shaped groove, a rectangular groove or a rhombic groove, etc., as long as the protrusion can move along the direction of the central axis of the cylinder bore in the groove 31.
[0039] In one embodiment, a plurality of grooves 31 may be formed on the surface of the firing bank 21. The plurality of grooves 31 are evenly distributed along the circumferential direction of the firing bank 21. At least one set of protrusions is formed on the inner wall of the carbon scraping ring. At least one set of protrusions includes being evenly distributed along the circumferential direction of the carbon scraping ring. Among them, whether the grooves 31 and the protrusions cooperating with the grooves 31 are provided on the carbon scraping ring or the firing bank 21, the effects achieved by their cooperation are the same, and no further elaboration will be made here.
[0040] In the above embodiment, an installation groove is provided on the inner wall of the cylinder liner 10, and the carbon scraping ring is snap-fitted in the installation groove. The provision of the installation groove facilitates the installation of the carbon scraping ring.
[0041] The present application also provides an engine, which includes the carbon scraping device in any of the above technical solutions. The failure rate of the engine with this carbon scraping device is relatively low.
[0042] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these changes and modifications.
Claims
1. A carbon scraping device, characterized in that, Comprising: A cylinder liner, a piston, and a carbon scraping ring; The cylinder liner has a cylinder bore, the piston is slidably disposed in the cylinder bore, the carbon scraping ring is disposed on the inner wall of the cylinder liner, and the fire deck at the end of the piston passes through the carbon scraping ring, wherein: A plurality of grooves and at least one set of protrusions are provided between the carbon scraping ring and the fire deck of the piston. The extending direction of the grooves is the same as the direction of the center line of the cylinder bore. The at least one set of protrusions cooperates with the plurality of grooves, and the protrusions can slide along the extending direction of the grooves.
2. The carbon scraping device according to claim 1, characterized in that, The plurality of grooves are formed on the inner wall of the carbon scraping ring, and the plurality of grooves are evenly distributed along the circumferential direction of the carbon scraping ring.
3. The carbon scraping device according to claim 2, wherein, The at least one set of protrusions is formed on the surface of the fire deck, and the plurality of protrusions included in the at least one set of protrusions are evenly distributed along the circumferential direction of the fire deck.
4. The carbon scraping device according to claim 3, characterized in that, The at least one set of protrusions includes a first set of protrusions, a second set of protrusions, and a third set of protrusions arranged along the direction of the center line of the cylinder bore. The first set of protrusions includes a plurality of first protrusions evenly distributed along the circumferential direction of the fire deck. The second set of protrusions includes a plurality of second protrusions evenly distributed along the circumferential direction of the fire deck. The third set of protrusions includes a plurality of third protrusions evenly distributed along the circumferential direction of the fire deck. The first protrusions, the second protrusions, and the third protrusions are all used to cooperate with the grooves.
5. The carbon scraping device according to claim 4, characterized in that, Along the direction of the center line of the cylinder bore, a plurality of the first protrusions and a plurality of the third protrusions coincide, and one second protrusion is disposed between two adjacent first protrusions and two adjacent third protrusions.
6. The carbon scraping device according to claim 4 or 5, characterized in that, Along the direction of the center line of the cylinder bore, the center lines of the plurality of first protrusions and the center lines of the plurality of third protrusions are parallel to the center line of the cylinder bore.
7. The carbon scraping device according to claim 4 or 5, characterized in that Along the direction of the center line of the cylinder bore, the included angle between the center lines of the plurality of second protrusions and the center line of the cylinder bore is 3° to 5°.
8. The carbon scraping device according to any one of claims 3 to 5, characterized in that The shape of the protrusion is cylindrical, square, or rhombic, and the shape of the groove is a U-shaped groove or a rectangular groove.
9. The carbon scraping device according to claim 1, wherein, The plurality of grooves are formed on the surface of the fire deck, and the plurality of grooves are evenly distributed along the circumferential direction of the fire deck. The at least one set of protrusions is formed on the inner wall of the carbon scraping ring, and the plurality of protrusions included in the at least one set of protrusions are evenly distributed along the circumferential direction of the carbon scraping ring; and / or, An installation groove is provided in a ring shape on the inner wall of the cylinder liner, and the carbon scraping ring is snap-fitted in the installation groove.
10. An engine, characterized in that, Including the carbon scraping device according to any one of claims 1 to 9.