CN1978955A - Sealing piston-ring - Google Patents

Sealing piston-ring Download PDF

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Publication number
CN1978955A
CN1978955A CN 200510045321 CN200510045321A CN1978955A CN 1978955 A CN1978955 A CN 1978955A CN 200510045321 CN200510045321 CN 200510045321 CN 200510045321 A CN200510045321 A CN 200510045321A CN 1978955 A CN1978955 A CN 1978955A
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CN
China
Prior art keywords
overlap joint
section
cross
ring body
mouthful
Prior art date
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Pending
Application number
CN 200510045321
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Chinese (zh)
Inventor
郝安阶
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Individual
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Individual
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Filing date
Publication date
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Priority to CN 200510045321 priority Critical patent/CN1978955A/en
Publication of CN1978955A publication Critical patent/CN1978955A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a piston ring. It includes ring boy set at the opening of which left end is set lapping block; right end is set lapping port of which upper surface is lower than the ring body one; immediate part section is rectangle that is 1/3-2/3 of the ring body one. The right side section of the immediate part is ladder like. And its left is 1/3-2/3 of the immediate part. The left side lapping block and lapping port have corresponding shape, and certain gap while their lapping which can make the fuel fully burn, save fuel, increase efficiency, reduce pollution, enlarge piston ring useful range, prolong useful life. Thus it has higher market generalization value.

Description

Sealing piston-ring
Technical field
The invention belongs to internal-combustion engine and technical field of hydraulic oil cylinder, specifically, relate to a kind of sealing piston-ring.
Background technique
Piston ring is the vitals that seals between maintenance cylinder and the piston, all there is an opened gap in present piston ring, the existence of this opened gap makes internal-combustion engine can not get desirable compression, this piston ring in use for some time, opened gap can increase with wear of piston-rings, thereby has caused piston ring short, phenomenons such as oil inflame is insufficient, carbon deposit increases, discharge amount of exhaust gas big, oil consumption increase, efficient reduction, befouling environment in working life.
Summary of the invention
The purpose of this invention is to provide a kind ofly can make that fuel oil is fully burned, the sealing piston-ring of fuel saving, efficient height, long service life.
For achieving the above object, the technical solution adopted in the present invention is: sealing piston-ring, comprise the ring body that is provided with opening, it is characterized in that: the end in described opening left side is provided with left side overlap joint mouth, the end on described opening right side is provided with right overlap joint mouth, the upper surface of described right overlap joint mouth is than the low and formation ladder-shaper structure of upper surface of ring body, the cross section of described right overlap joint mouthful intermediate portion is a rectangle, its cross section is 1/3~2/3 of ring body cross section, the cross section, right side of described right overlap joint mouthful intermediate portion is a ladder-shaper structure, the cross section, left side of described right overlap joint mouthful intermediate portion is 1/3~2/3 of intermediate portion cross section, and described left side overlap joint mouth has mouthful to overlap with right overlap joint and cooperates corresponding shape.
The end in described opening left side is provided with left side overlap joint mouth, the end on described opening right side is provided with right overlap joint mouth, the inner side surface of described right overlap joint mouth and the inner side surface of ring body form ladder-shaper structure, the cross section of described right overlap joint mouthful intermediate portion is a rectangle, its cross section is 1/3~2/3 of ring body cross section, the cross section, right side of described right overlap joint mouthful intermediate portion is a ladder-shaper structure, the cross section, left side of described right overlap joint mouthful intermediate portion is 1/3~2/3 of intermediate portion cross section, and described left side overlap joint mouth has mouthful to overlap with right overlap joint and cooperates corresponding shape.
The end in described opening left side is provided with left side overlap joint mouth, the end on described opening right side is provided with right overlap joint mouth, the upper surface of described right overlap joint mouth is than the low and formation ladder-shaper structure of upper surface of ring body, the cross section of described right overlap joint mouthful right side part is a rectangle, its cross section is 1/3~2/3 of ring body cross section, its cross section is 1/3~2/3 of partial cross-section, right side, and described left side overlap joint mouth has mouthful to overlap with right overlap joint and cooperates corresponding shape.
The end in described opening left side is provided with left side overlap joint mouth, the end on described opening right side is provided with right overlap joint mouth, the cross section of described right overlap joint mouthful is a rectangle, and its cross section is 1/3~2/3 of ring body cross section, and described left side overlap joint mouth has mouthful to overlap with right overlap joint and cooperates corresponding shape.
The end of described opening and arranged on left and right sides is respectively equipped with left and right overlap joint mouth, the inboard of described left and right overlap joint mouth is provided with the groove that is used for holding link, described link will have the ring body of opening to connect into the closed round ring body, and the inboard of described link is provided with spring sheet or link is the permanent magnetism link.
Below be the improvement of such scheme:
Described right the overlap joint has certain interval each other when mouth overlaps with left side overlap joint mouth.
Has certain interval when described left overlap joint mouth, right overlap joint mouth, link overlap joint each other.Beneficial effect: the present invention adopts said structure, compared with prior art have the following advantages: solved the indeterminable opening junction point of conventional piston ring gas leak phenomenon, thereby fuel oil is fully burned, saved fuel, improve efficient, reduced pollution, enlarged the using scope of piston ring, prolonged working life, the present invention has higher market popularization value.
The invention will be further described below in conjunction with drawings and Examples.
Description of drawings
Accompanying drawing 1 is the structural representation during the piston ring free state in the embodiment of the invention 1;
Accompanying drawing 2 is the structural representation during the piston ring working state in the embodiment of the invention 1;
Accompanying drawing 3 is the side view during the piston ring working state in the embodiment of the invention 1;
Accompanying drawing 4 is the structural representation during the piston ring free state in the embodiment of the invention 2;
Accompanying drawing 5 is the structural representation during the piston ring working state in the embodiment of the invention 2;
Accompanying drawing 6 is the side view during the piston ring working state in the embodiment of the invention 2;
Accompanying drawing 7 is the structural representation during the piston ring free state in the embodiment of the invention 3;
Accompanying drawing 8 is the structural representation during the piston ring working state in the embodiment of the invention 3;
Accompanying drawing 9 is the side view during the piston ring working state in the embodiment of the invention 3;
Accompanying drawing 10 is the structural representation during the piston ring free state in the embodiment of the invention 4;
Accompanying drawing 11 is the structural representation during the piston ring working state in the embodiment of the invention 4;
Accompanying drawing 12 is the side view during the piston ring working state in the embodiment of the invention 4;
Accompanying drawing 13 is the structural representation during the piston ring free state in the embodiment of the invention 5;
Structural representation when accompanying drawing 14 is the embodiment of the invention 5 working staties;
Accompanying drawing 15 is the side view during the piston ring working state in the embodiment of the invention 5;
Accompanying drawing 16 is the structural representation during the piston ring free state in the embodiment of the invention 6;
Accompanying drawing 17 is the structural representation during the piston ring working state in the embodiment of the invention 6;
Accompanying drawing 18 is the side view during the piston ring working state in the embodiment of the invention 6;
Accompanying drawing 19 is the structural representation during the piston ring free state in the embodiment of the invention 7;
Accompanying drawing 20 is the structural representation during the piston ring working state in the embodiment of the invention 7;
Accompanying drawing 21 is the side view during the piston ring working state in the embodiment of the invention 7;
Accompanying drawing 22 is the structural representation during the piston ring free state in the embodiment of the invention 8;
Accompanying drawing 23 is the structural representation during the piston ring working state in the embodiment of the invention 8;
Accompanying drawing 24 is the side view during the piston ring working state in the embodiment of the invention 8;
Accompanying drawing 25 is the structural representation during the piston ring free state in the embodiment of the invention 9;
Accompanying drawing 26 is the structural representation during the piston ring working state in the embodiment of the invention 9;
Accompanying drawing 27 is the side view during the piston ring working state in the embodiment of the invention 9;
Accompanying drawing 28 is the structural representation of piston ring link in the embodiment of the invention 8;
Accompanying drawing 29 is the side view of piston ring link in the embodiment of the invention 8;
Accompanying drawing 30 is the right overlap joint of a piston ring mouthful right side phantom in the embodiment of the invention 1,2,4;
Accompanying drawing 31 is the sectional view of the right overlap joint of piston ring mouthful right side part in the embodiment of the invention 3;
Accompanying drawing 32 is the sectional view of the right overlap joint of piston ring mouthful right side part in the embodiment of the invention 5;
Accompanying drawing 33 is the sectional view of the right overlap joint mouthful intermediate portion of piston ring in the embodiment of the invention 4,5,9;
Accompanying drawing 34 is the sectional view of the right overlap joint mouthful intermediate portion of piston ring in the embodiment of the invention 1,2,3,6,7;
Accompanying drawing 35 is the sectional view of the right overlap joint mouthful left part of piston ring in the embodiment of the invention 1,2,3,4,5,6,7.
Embodiment
Embodiment 1, as shown in Figure 1, sealing piston-ring, comprise the ring body 1 that is provided with opening 2, the end in opening 2 left sides is provided with left side overlap joint mouth, the end on opening 2 right sides is provided with right overlap joint mouth, as Fig. 2, shown in 3, when left side overlap joint mouth cooperates with a right overlap joint mouthful overlap joint, can be meshing with each other and have certain interval, the upper surface of right overlap joint mouth is positioned on the ring body 1, the neutral position of lower surface, and form ladder-shaper structure with ring body 1, the lower surface of right overlap joint mouth and the lower surface of ring body 1 are in the same plane, as shown in figure 30, the cross section of right overlap joint mouthful right side part is a ladder-shaper structure, the outer side surface of right overlap joint mouthful right side part and the outer side surface of ring body 1 are in the same cambered surface, the cross section of right overlap joint mouthful right side part is 3/4 of ring body 1 cross section, as shown in figure 34, the cross section of right overlap joint mouthful intermediate portion is a rectangle, and the inner side surface of right overlap joint mouthful intermediate portion and the inner side surface of ring body 1 are in the same cambered surface, and its cross section is 1/2 of ring body 1 cross section, as shown in figure 35, the cross section of right overlap joint mouthful left part is a rectangle, and the inner side surface of right overlap joint mouthful left part and the inner side surface of ring body 1 are in the same cambered surface, and its cross section is 1/2 of right overlap joint mouthful intermediate portion cross section.
Embodiment 2, as shown in Figure 4, sealing piston-ring, comprise the ring body 1 that is provided with opening 2, the end in opening 2 left sides is provided with left side overlap joint mouth, the end on opening 2 right sides is provided with right overlap joint mouth, as Fig. 5, shown in 6, when left side overlap joint mouth cooperates with a right overlap joint mouthful overlap joint, can be meshing with each other and have certain interval, the upper surface of right overlap joint mouth is positioned on the ring body 1, the neutral position of lower surface, and form ladder-shaper structure with ring body 1, the lower surface of right overlap joint mouth and the lower surface of ring body 1 are in the same plane, the outer side surface of right overlap joint mouth and the outer side surface of ring body 1 are in the same cambered surface, as shown in figure 30, the cross section of right overlap joint mouthful right side part is a ladder-shaper structure, the cross section of right overlap joint mouthful right side part is 3/4 of ring body 1 cross section, as shown in figure 34, the cross section of right overlap joint mouthful intermediate portion is a rectangle, the inner side surface of right overlap joint mouthful intermediate portion and the inner side surface of ring body 1 are in the same cambered surface, and its cross section is 1/2 of ring body 1 cross section, as shown in figure 35, the cross section of right overlap joint mouthful left part is a rectangle, and its cross section is 1/2 of right overlap joint mouthful intermediate portion cross section.
Embodiment 3, as shown in Figure 7, sealing piston-ring, comprise the ring body 1 that is provided with opening 2, the end in opening 2 left sides is provided with left side overlap joint mouth, the end on opening 2 right sides is provided with right overlap joint mouth, as Fig. 8, shown in 9, when left side overlap joint mouth cooperates with a right overlap joint mouthful overlap joint, can be meshing with each other and have certain interval, the upper surface of right overlap joint mouth is positioned on the ring body 1, the neutral position of lower surface, and form ladder-shaper structure with ring body 1, the lower surface of right overlap joint mouth and the lower surface of ring body 1 are in the same plane, as shown in figure 31, the cross section of right overlap joint mouthful right side part is a ladder-shaper structure, the inner side surface of right overlap joint mouthful right side part and the inner side surface of ring body 1 are in the same cambered surface, the cross section of right overlap joint mouthful right side part is 3/4 of ring body 1 cross section, as shown in figure 34, the cross section of right overlap joint mouthful intermediate portion is a rectangle, and the inner side surface of right overlap joint mouthful intermediate portion and the inner side surface of ring body 1 are in the same cambered surface, and its cross section is 1/2 of ring body 1 cross section, as shown in figure 35, the cross section of right overlap joint mouthful left part is a rectangle, and the outer side surface of right overlap joint mouthful left part and the outer side surface of ring body 1 are in the same cambered surface, and its cross section is 1/2 of right overlap joint mouthful intermediate portion cross section.
Embodiment 4, as shown in figure 10, sealing piston-ring, comprise the ring body 1 that is provided with opening 2, the end in opening 2 left sides is provided with left side overlap joint mouth, the end on opening 2 right sides is provided with right overlap joint mouth, as Figure 11, shown in 12, when left side overlap joint mouthful cooperates with a right overlap joint mouthful overlap joint, can be meshing with each other and have certain interval, the inner side surface formation ladder-shaper structure of the inner side surface of right overlap joint mouth and ring body 1, the lower surface of right overlap joint mouth and the lower surface of ring body 1 are in the same plane, the outer side surface of right overlap joint mouth and the outer side surface of ring body 1 are in the same cambered surface, and as shown in figure 33, the cross section of right overlap joint mouthful intermediate portion is a rectangle, the upper surface of right overlap joint mouthful intermediate portion and the upper surface of ring body 1 are in the same plane, its cross section is 1/2 of ring body 1 cross section, and as shown in figure 30, the cross section, right side of right overlap joint mouthful intermediate portion is a ladder-shaper structure, its cross section is 3/4 of ring body 1 cross section, as shown in figure 35, the cross section, left side of right overlap joint mouthful intermediate portion is a rectangle, and its cross section is 1/2 of intermediate portion cross section.
Embodiment 5, as shown in figure 13, sealing piston-ring, comprise the ring body 1 that is provided with opening 2, the end in opening 2 left sides is provided with left side overlap joint mouth, the end on opening 2 right sides is provided with right overlap joint mouth, as Figure 14, shown in 15, when left side overlap joint mouthful cooperates with a right overlap joint mouthful overlap joint, can be meshing with each other and have certain interval, the inner side surface formation ladder-shaper structure of the inner side surface of right overlap joint mouth and ring body 1, the lower surface of right overlap joint mouth and the lower surface of ring body 1 are in the same plane, the outer side surface of right overlap joint mouth and the outer side surface of ring body 1 are in the same cambered surface, and as shown in figure 33, the cross section of right overlap joint mouthful intermediate portion is a rectangle, the upper surface of right overlap joint mouthful intermediate portion and the upper surface of ring body 1 are in the same plane, its cross section is 1/2 of ring body 1 cross section, and shown in figure 32, the cross section, right side of right overlap joint mouthful intermediate portion is for falling ladder-shaper structure, its cross section is 3/4 of ring body 1 cross section, as shown in figure 35, the cross section, left side of right overlap joint mouthful intermediate portion is a rectangle, and the cross section of right overlap joint mouthful left part is 1/2 of intermediate portion cross section.
Embodiment 6, as shown in figure 16, sealing piston-ring, comprise the ring body 1 that is provided with opening 2, the end in opening 2 left sides is provided with left side overlap joint mouth, the end on opening 2 right sides is provided with right overlap joint mouth, as Figure 17, shown in 18, left side overlap joint mouthful and right overlap joint mouthful overlap when cooperating, and can be meshing with each other and have certain interval, the upper surface of opening 2 right overlap joint mouths is positioned on the ring body 1, the neutral position of lower surface, and form ladder-shaper structure with ring body 1, and the outer side surface of right overlap joint mouthful is in the same cambered surface with the outer side surface of ring body 1, and the lower surface of right overlap joint mouth and the lower surface of ring body 1 are in the same plane, as shown in figure 34, the cross section of right overlap joint mouthful right side part is a rectangle, and its cross section is 1/2 of ring body 1 cross section, as shown in figure 35, the cross section of right overlap joint mouthful left part is a rectangle, and its cross section is 1/2 of partial cross-section, right side.
Embodiment 7, as shown in figure 19, sealing piston-ring, comprise the ring body 1 that is provided with opening 2, the end in opening 2 left sides is provided with left side overlap joint mouth, the end on opening 2 right sides is provided with right overlap joint mouth, as Figure 20, shown in 21, left side overlap joint mouthful and right overlap joint mouthful overlap when cooperating, and can be meshing with each other and have certain interval, the upper surface of opening 2 right overlap joint mouths is positioned on the ring body 1, the neutral position of lower surface, and form ladder-shaper structure with ring body 1, and the inner side surface of right overlap joint mouthful is in the same cambered surface with the inner side surface of ring body 1, and the lower surface of right overlap joint mouth and the lower surface of ring body 1 are in the same plane, as shown in figure 34, the cross section of right overlap joint mouthful right side part is a rectangle, and its cross section is 1/2 of ring body 1 cross section, as shown in figure 35, the cross section of right overlap joint mouthful left part is a rectangle, and its cross section is 1/2 of partial cross-section, right side.
Embodiment 8, as Figure 22, shown in 23, sealing piston-ring, comprise the ring body 1 that is provided with opening 2, link 3, the end in opening 2 left sides is provided with left side overlap joint mouth, the end on opening 2 right sides is provided with right overlap joint mouth, a left side, the inboard of right overlap joint mouth is provided with the groove that is used for holding link 3, as shown in figure 24, the upper surface of left side overlap joint mouth is than the low and formation ladder-shaper structure of upper surface of ring body 1, the right low and formation ladder-shaper structure of upper surface that overlaps the upper surface of mouth than ring body 1, link 3 will have the ring body 1 of opening 2 to connect into the closed round ring body, left side overlap joint mouth, right overlap joint mouth, has certain interval during link 3 overlap joints each other, as Figure 28, shown in 29, the inboard of link 3 is provided with spring sheet 4, and after the installation, spring sheet 4 compresses link 3 and ring body 1.
Embodiment 9, as shown in figure 25, sealing piston-ring, comprise the ring body 1 that is provided with opening 2, the end in opening 2 left sides is provided with the right overlap joint mouth in left side, the end on opening 2 right sides is provided with right overlap joint mouth, as Figure 26, shown in 27, when left side overlap joint mouth cooperates with a right overlap joint mouthful overlap joint, can be meshing with each other and have certain interval, on the right overlap joint mouth, on lower surface and the ring body 1, lower surface is in the same plane, and the outer side surface of right overlap joint mouth and the outer side surface of ring body 1 are in the same cambered surface, as shown in figure 33, the cross section of right overlap joint mouth is a rectangle, its cross section is 1/2 of ring body 1 cross section, and left side overlap joint mouth has mouthful to overlap with right overlap joint and cooperates corresponding shape, during installation, two sealing piston-rings are packed in the piston ring groove, become 180 ° of angles between the opening 2 of two sealing piston-rings, be fixed by the locating stud in the piston ring groove, no longer mobile.
Link 3 among the embodiment 8 can be the permanent magnetism link.

Claims (7)

1, sealing piston-ring, comprise the ring body (1) that is provided with opening (2), it is characterized in that: the end in described opening (2) left side is provided with left side overlap joint mouth, the end on described opening (2) right side is provided with right overlap joint mouth, the upper surface of described right overlap joint mouth is than the low and formation ladder-shaper structure of upper surface of ring body (1), the cross section of described right overlap joint mouthful intermediate portion is a rectangle, its cross section is 1/3~2/3 of ring body (1) cross section, the cross section, right side of described right overlap joint mouthful intermediate portion is a ladder-shaper structure, the cross section, left side of described right overlap joint mouthful intermediate portion is 1/3~2/3 of intermediate portion cross section, and described left side overlap joint mouth has mouthful to overlap with right overlap joint and cooperates corresponding shape.
2, sealing piston-ring, comprise the ring body (1) that is provided with opening (2), it is characterized in that: the end in described opening (2) left side is provided with left side overlap joint mouth, the end on described opening (2) right side is provided with right overlap joint mouth, the inner side surface of described right overlap joint mouth and the inner side surface of ring body (1) form ladder-shaper structure, the cross section of described right overlap joint mouthful intermediate portion is a rectangle, its cross section is 1/3~2/3 of ring body (1) cross section, the cross section, right side of described right overlap joint mouthful intermediate portion is a ladder-shaper structure, the cross section, left side of described right overlap joint mouthful intermediate portion is 1/3~2/3 of intermediate portion cross section, and described left side overlap joint mouth has mouthful to overlap with right overlap joint and cooperates corresponding shape.
3, sealing piston-ring, comprise the ring body (1) that is provided with opening (2), it is characterized in that: the end in described opening (2) left side is provided with left side overlap joint mouth, the end on described opening (2) right side is provided with right overlap joint mouth, the upper surface of described right overlap joint mouth is than the low and formation ladder-shaper structure of upper surface of ring body (1), the cross section of described right overlap joint mouthful right side part is a rectangle, its cross section is 1/3~2/3 of ring body (1) cross section, its cross section is 1/3~2/3 of partial cross-section, right side, and described left side overlap joint mouth has mouthful to overlap with right overlap joint and cooperates corresponding shape.
4, sealing piston-ring, comprise the ring body (1) that is provided with opening (2), it is characterized in that: the end in described opening (2) left side is provided with left side overlap joint mouth, the end on described opening (2) right side is provided with right overlap joint mouth, the cross section of described right overlap joint mouth is a rectangle, its cross section is 1/3~2/3 of ring body (1) cross section, and described left side overlap joint mouth has mouthful to overlap with right overlap joint and cooperates corresponding shape.
5, sealing piston-ring, comprise the ring body (1), the link (3) that are provided with opening (2), it is characterized in that: the end of described opening (2) and arranged on left and right sides is respectively equipped with left and right overlap joint mouth, the inboard of described left and right overlap joint mouth is provided with the groove that is used for holding link (3), described link (3) will have the ring body (1) of opening (2) to connect into the closed round ring body, and the inboard of described link (3) is provided with spring sheet (4) or link (3) is the permanent magnetism link.
6, as claim 1 or 2 or 3 or 4 described sealing piston-rings, it is characterized in that: described right the overlap joint has certain interval each other when mouth overlaps with left side overlap joint mouth.
7, sealing piston-ring as claimed in claim 5 is characterized in that: have certain interval when described left overlap joint mouth, right overlap joint mouth, link (3) overlap joint each other.
CN 200510045321 2005-12-08 2005-12-08 Sealing piston-ring Pending CN1978955A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200510045321 CN1978955A (en) 2005-12-08 2005-12-08 Sealing piston-ring

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200510045321 CN1978955A (en) 2005-12-08 2005-12-08 Sealing piston-ring

Publications (1)

Publication Number Publication Date
CN1978955A true CN1978955A (en) 2007-06-13

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Application Number Title Priority Date Filing Date
CN 200510045321 Pending CN1978955A (en) 2005-12-08 2005-12-08 Sealing piston-ring

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108952848A (en) * 2018-08-02 2018-12-07 嘉兴博瑞涡轮增压技术有限公司 A kind of efficient turbocharger shell structure
CN109026179A (en) * 2018-08-02 2018-12-18 嘉兴博瑞涡轮增压技术有限公司 A kind of novel supercharger sealing structure
CN113216097A (en) * 2021-05-06 2021-08-06 中国葛洲坝集团第一工程有限公司 Jacking-free gate bottom pivot sealing element connecting tool and method
CN113685286A (en) * 2021-09-27 2021-11-23 南通四维动力机械科技有限责任公司 Piston ring for internal combustion engine
CN113958421A (en) * 2021-11-13 2022-01-21 安徽江淮汽车集团股份有限公司 Engine piston gas ring

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108952848A (en) * 2018-08-02 2018-12-07 嘉兴博瑞涡轮增压技术有限公司 A kind of efficient turbocharger shell structure
CN109026179A (en) * 2018-08-02 2018-12-18 嘉兴博瑞涡轮增压技术有限公司 A kind of novel supercharger sealing structure
CN113216097A (en) * 2021-05-06 2021-08-06 中国葛洲坝集团第一工程有限公司 Jacking-free gate bottom pivot sealing element connecting tool and method
CN113685286A (en) * 2021-09-27 2021-11-23 南通四维动力机械科技有限责任公司 Piston ring for internal combustion engine
CN113958421A (en) * 2021-11-13 2022-01-21 安徽江淮汽车集团股份有限公司 Engine piston gas ring

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