CN109654224A - It is a kind of that drive piston is launched using combination-compound seal combustion gas - Google Patents
It is a kind of that drive piston is launched using combination-compound seal combustion gas Download PDFInfo
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- CN109654224A CN109654224A CN201811574664.3A CN201811574664A CN109654224A CN 109654224 A CN109654224 A CN 109654224A CN 201811574664 A CN201811574664 A CN 201811574664A CN 109654224 A CN109654224 A CN 109654224A
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- combination
- sealing
- combustion gas
- piston head
- seal
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Classifications
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- 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
- F16J1/00—Pistons; Trunk pistons; Plungers
- F16J1/005—Pistons; Trunk pistons; Plungers obtained by assembling several pieces
-
- 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
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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)
- Portable Nailing Machines And Staplers (AREA)
Abstract
Drive piston, including thermal protection structure, first piston head, second piston head, connection structure, wedge block, T-shaped block, sealing ring are launched using combination-compound seal combustion gas the invention discloses a kind of, wherein wedge block and T-shaped block collectively form T-type structure；Thermal protection structure is mounted on first piston head front end；First piston head and second piston head are mounted on the both ends of connection structure, and T-type structure is mounted in connection structure；Drive piston is sealed into combination-compound seal, is made of rectangle combination sealing, D-shaped combination sealing, the sealing of O shape；Perforative sealing trough of belt is provided with inside drive piston；It is a kind of to be mounted in opening cylinder using combination-compound seal combustion gas ejection drive piston, it is acted on by high-temperature high-pressure fuel gas.Compared with prior art, the present invention component structural is simple and manufacturing process is easy, and it is light-weight, it is equipped with thermal protection structure, sealing effect is prominent, so that the reliability and efficiency of combustion gas ejection are improved.
Description
Technical field
The invention belongs to catapult techniques, and in particular to a kind of to launch drive piston using combination-compound seal combustion gas.
Background technique
Combustion gas ejection is the burning by Oxidizing and Reducing Agents, generates a large amount of combustion gas, pushes high speed piston operation
A kind of ejection mode.The effective travel of piston ejection is long, but its drive piston and Seal Design are extremely important.Combustion gas ejection system
Equipment is simple, reaction speed is fast, but the combustion gas of high temperature and pressure proposes very high requirement to sealing, and conventional hermetic is no longer suitable
It closes and uses.However, the power and efficiency of drive piston combustion gas ejection depend on the speed and loss of energy transmission, energy loss is exhausted
Major part is embodied in leakage, therefore the sealing performance of drive piston becomes guarantee combustion gas ejection reliability and the important of efficiency is determined
Determine factor.
Piston seal technology includes three categories sealing means at present, i.e. clearance seal, rubber seal rings for seal, building rubber compound
Sealing.Clearance seal relies on the gap that one section of very little is kept between two movement parts mating surfaces, is suitable for that diameter is smaller, pressure is lower
Piston seal；Sealing ring sealing is the precommpression by sealing ring, eliminates gap and realizes sealing, common are O shape, Y shape, V-arrangement
Etc. forms sealing；Combination sealing is composed of O-ring seals and other shapes sealing ring.
These sealing techniques are widely used in each field in industry.Chinese patent CN205877245U, which discloses one kind, to be had
The burnt gas valve of high-temperature high-pressure fuel gas dynamic sealing function, it is characterised in that using the graphite annular of support component combination mating spherical surfaces
It at movable sealing structure, solves spool and belongs to civil field in rotary course high temperature high-pressure gas leakage problem, and is not applicable
In large-scale ejection device.Utility model patent CN206458816U discloses a kind of combined type piston sealing piece, it is characterised in that
The retaining ring of setting uses polyformaldehyde material, and sealing ring uses polyurethane material, fourth eyeball rubber is housed between two shape retaining rings insides
The elastomer of glue is able to satisfy sealing performance requirement, but combining form is simple, and use condition is limited, should not be used in high temperature and pressure combustion
Gas ejection.Chinese patent CN102145771A discloses special for the piston and piston rod of a rodless distributor, utility model
Sharp CN206917964U discloses a kind of no rod-type compression cylinder, is not to apply to high speed ejection field, and structure is more multiple
Miscellaneous, high-voltage performance resistant to high temperatures is poor, and does not consider the sealing structure of piston.For weapon and war industry, especially combustion gas bullet
Field is penetrated, needs pointedly to design a kind of sealing for being resistant to high temperature and pressure and high reliablity and drive piston, guarantees weapon system
The normal work of system.
Summary of the invention
Drive piston is launched using combination-compound seal combustion gas the purpose of the present invention is to provide a kind of, solves combustion gas
Launch the leakage problem in drive piston manufacture difficulty and ejection process.
The technical solution for realizing the aim of the invention is as follows: a kind of to launch transmission work using combination-compound seal combustion gas
Plug, setting is in opening ejection cylinder, including thermal protection sheet, first piston head, connector, T-type structure, second piston head, combination-
Composite sealing assembly and the 4th O-ring seals；First piston head and second piston head are respectively fixedly connected in the both ends of connector, and heat is anti-
Backplate is fixed on first piston head bottom surface, and T-type structure is fixed on connector；It is living that combination-composite sealing assembly is fixed on first
The lateral wall of chock plug, the 4th O-ring seals are fixed on the lateral wall of second piston head.
The first piston head is cylinder, and lateral wall encloses seal groove every setting three between the upper and lower, from lower upward point
Not Wei the first seal groove, the second seal groove and third seal groove, first piston head end face center is provided with a cross
Groove, connector top are bolted in cross groove, and combination-composite sealing assembly is fixed on the first sealing ring
In slot, the second seal groove and third seal groove.
Compared with prior art, the present invention its remarkable advantage is:
(1) it assembles to form piston structure by simple components, total quality is small, dismounts and easy to maintenance；Component technological
Process is simple, and manufacture is easy；The thermal protection structure of setting can be effectively protected drive piston and not impacted and be damaged by high-temperature fuel gas
It is bad.
(2) use combination-compound seal, can precommpression generate the combustion gas of pre-tight stress and high temperature and pressure, improve
The reliability of sealing ensure that the efficiency of combustion gas ejection so that the leakage rate of combustion gas is greatly reduced.
Detailed description of the invention
Fig. 1 is first piston header structure figure of the present invention using combination-compound seal combustion gas ejection drive piston, wherein
Scheming (a) is three-dimensional axonometric drawing, and figure (b) is top view.
Fig. 2 is provided in an embodiment of the present invention a kind of using combination-compound seal combustion gas ejection drive piston thermal protection
Structure chart.
Fig. 3 is provided in an embodiment of the present invention a kind of living using combination-compound seal combustion gas ejection drive piston second
Chock plug structure chart, wherein figure (a) is main view, figure (b) is top view, and figure (c) is bottom view.
Fig. 4 is provided in an embodiment of the present invention a kind of using combination-compound seal combustion gas ejection drive piston connection knot
Structure three-dimensional axonometric drawing.
Fig. 5 is provided in an embodiment of the present invention a kind of using combination-compound seal combustion gas ejection drive piston T-type structure
Three-dimensional axonometric drawing.
Fig. 6 is provided in an embodiment of the present invention a kind of using combination-compound seal combustion gas ejection drive piston assembly knot
Composition, wherein figure (a) is three-dimensional main view, figure (b) is partial 3 d figure, and figure (c) is cross-sectional view.
Fig. 7 is provided in an embodiment of the present invention a kind of using combination-compound seal combustion gas ejection drive piston ejection cylinder
Three-dimensional axonometric drawing.
Fig. 8 is provided in an embodiment of the present invention a kind of living using combination-compound seal combustion gas ejection drive piston first
Plugs seal structure chart, wherein figure (a) is three-dimensional axonometric drawing, figure (b) is cross-sectional view.
Fig. 9 is provided in an embodiment of the present invention a kind of living using combination-compound seal combustion gas ejection drive piston first
Chock plug installation diagram partial sectional view.
Figure 10 is provided in an embodiment of the present invention a kind of living using combination-compound seal combustion gas ejection drive piston second
Plugs seal structure sectional view.
Specific embodiment
Present invention is further described in detail with reference to the accompanying drawing.
It is of the present invention a kind of using combination-compound seal combustion gas ejection drive piston in conjunction with Fig. 1 to Figure 10, if
It sets in opening ejection cylinder 2, is acted on and moved by high-temperature high-pressure fuel gas, and then push bullet of the carry on piston power output end
Body movement.It is described to include thermal protection sheet 13, first piston head 11, connect using combination-compound seal combustion gas ejection drive piston
Fitting 7, T-type structure 8, second piston head 12, combination-composite sealing assembly 9 and the 4th O-ring seals 101.First piston head 11
It is respectively fixedly connected with second piston head 12 in the both ends of connector 7, thermal protection sheet 13 is fixed by bolts in 11 bottom of first piston head
Face, T-type structure 8 are bolted on connector 7.Combination-composite sealing assembly 9 is fixed on the outside of first piston head 11
Wall, the 4th O-ring seals 101 are fixed on the lateral wall of second piston head 12.
The first piston head 11 be cylinder, lateral wall between the upper and lower every setting three enclose seal groove, from it is lower it is upper upwards
Respectively the first seal groove 33, the second seal groove 43 and third seal groove 52,11 end face center of first piston head are provided with
One cross groove, 7 top of connector are bolted in cross groove, and combination-composite sealing assembly 9 is fixed on
In first seal groove 33, the second seal groove 43 and third seal groove 52.
Combination-the composite sealing assembly 9 includes rectangle combination sealing 3, D-shaped combination sealing 4 and O shape sealing 5, rectangle group
Closing sealing 3 includes rectangular seal 31 and the first O-ring seals 32, is arranged in the first seal groove 33, so that the first O shape is close
Seal 32 is contacted with the bottom surface of seal groove 33, and rectangular seal 31 is located between opening ejection cylinder 2 and the first O-ring seals 32.D
Shape combination sealing 4 includes D-shaped sealing ring 41 and the second O-ring seals 42, is arranged in the second seal groove 43, so that the 2nd O
Shape sealing ring 42 is contacted with 43 bottom surface of the second seal groove, and D-shaped sealing ring 41 is located at opening ejection cylinder 2 and the second O-ring seals 42
Between.O shape sealing 5 uses third O-ring seals 51, is arranged in third seal groove 52, and contacts with opening ejection cylinder 2.
The first empty room 62 is formed between rectangle combination sealing 3 and D-shaped combination sealing 4, is formed between D-shaped combination sealing 4 and O shape sealing 5
Second empty room 61 forms third empty room 63 between the sealing 5 of O shape and the 4th sealing ring 101；The cooperation of sealing ring and seal groove is equal
For clearance fit, drive piston is combined into clearance fit with matching for ejection cylinder 2, and the sealing ring after installation is made to there is centainly pre-
Decrement.
The second piston head 12 is cylinder, and lateral wall top is provided with the 4th seal groove 102 of a circle, the 4th O shape
Sealing ring 101 is fixed in the 4th seal groove 102, and is contacted with opening ejection cylinder 2, and 12 bottom surface of second piston head is provided with one
T connected in star, the bottom of connector 7 and T connected in star are connected.
The connector 7 includes connecting plate 71, stiffening plate 72 and right-angled trapezium block 73, and stiffening plate 72 is along connecting plate 71
Mandrel line is fixed on 71 1 sides of connecting plate, and right-angled trapezium block 73 is fixed on connecting plate 71 separately along the central axis of connecting plate 71
The top surface of one side, the right angle and connecting plate 71 of right-angled trapezium block 73 is coplanar, connecting plate 71, stiffening plate 72 and right-angled trapezium
73 three top surface of block is constituted in the cross groove of cross plane insertion first piston head 11.Both connecting plate 71 and stiffening plate 72
In the T connected in star of the at T-shaped insertion second piston head 12 of bottom surface structure.
Reinforcing rib is equipped between the stiffening plate 72 and connecting plate 71.
71 length of connecting plate and 72 equal length of stiffening plate.
The T-type structure 8 includes wedge block 81, T-shaped block 82 and square plate 83, and wedge block 81 is fixed on T-shaped block by joggle
82 top surface, wedge block 81 and T-shaped block 82 are fixed on 83 1 sides of square plate, 81 top surface of wedge block along the central axis of square plate 83
Oblique 83 direction of square plate cuts off a corner block, and the face that another side of square plate 83 and connecting plate 71 are equipped with right-angled trapezium block 73 is solid
Even, so that wedge block 81 cuts off the part of a corner block and cooperates with the inclined-plane of right-angled trapezium block 73.
The length of the square plate 83 is less than the length of connecting plate 71.
Referring to Fig. 6, further, the combustion gas ejection drive piston is no rod-type drive piston, using 7075-T651 high
Strength aluminium alloy manufacture.
Referring to Fig. 7, further, the ejection cylinder 2 is opening cylinder, and material is steel or other high-test metals.
In conjunction with Fig. 8 to Figure 10, further, the position that the rectangular seal 31 is contacted with ejection cylinder 2 opens up chamfering, and
Material is polytetrafluoroethylene (PTFE) or other similar sealing material；41 material of D-shaped sealing ring is polytetrafluoroethylene (PTFE), the 3rd O shape
The material of sealing ring 51 and the 4th O-ring seals 101 is rubber or other similar sealing material.
In conjunction with Fig. 8 to Figure 10, further, when the geometric parameter of the sealing, the geometric position of per pass sealing, installation
Pre compressed magnitude is required to according to depending on actual ejection situation.
In conjunction with Fig. 8 to Figure 10, further, when the combination-compound seal works, certain lubrication is needed, such as lubricated
Oil lubrication, grease lubrication.
A kind of course of work using combination-compound seal combustion gas ejection drive piston of the present invention is as follows:
When work, the combustion gas that gas generator generates high temperature and pressure acts on the thermal protection sheet 13 of the lower end surface of first piston head 11
On, since the upper surface of second piston head 12 is connected with the external world, so that drive piston is integrally generated high speed by a pressure difference
Movement, and then the body of carry is dished out by T-type structure 8；Some gases pass through between first piston head 11 and ejection cylinder 2
Gap acts in first of sealed rectangular sealing 3；Due to precompressed effect, rectangular seal 31 and O shape can be made to seal
Enclose one 32 generation micro-strains, both guarantee that contact can effectively block gas leakage, but rectangular seal 31 with launch connecing for cylinder 2
Contact portion position can generate deviation because of the relative motion of high speed, and then a certain amount of leakage occurs；It is former that leakage is flowed according to gap
Reason, gaseous-pressure and temperature after leakage can decline to a great extent, therefore, the relatively low pressure of first of sealing leak and the combustion of temperature
Gas is by empty room 61 and then acts in second sealing D-shaped sealing 4；Similarly, the combustion gas compared with low pressure and temperature will lead to
Two sealings generate lesser amount of leakage, and strong and temperature the combustion gas at low pressure after leakage enters empty room 62 by gap, into one
Step acts on three seals；The gaseous-pressure and temperature that three seals are subject to are all very low, so as to cause leakage more
It is small, so that the combustion gas into empty room 63 is almost nil, so that the 4th to being isolated from the outside world under the action of sealing.Due to combustion
The working time of gas ejection is within one second, and slot leakage can cause the sharply decline of pressure and temperature, so that combination-is compound
Good sealing effect is played in sealing, improves the reliability and efficiency of combustion gas ejection, guarantees the normal work of combustion gas catapult-launching gear.
Claims (9)
1. a kind of launch drive piston using combination-compound seal combustion gas, in opening ejection cylinder (2), feature exists for setting
In: including thermal protection sheet (13), first piston head (11), connector (7), T-type structure (8), second piston head (12), combination-
Composite sealing assembly (9) and the 4th O-ring seals (101)；First piston head (11) and second piston head (12) be respectively fixedly connected in
The both ends of connector (7), thermal protection sheet (13) are fixed on first piston head (11) bottom surface, and T-type structure (8) is fixed on connector
(7) on；The lateral wall of first piston head (11) is fixed in combination-composite sealing assembly (9), and the 4th O-ring seals (101) are fixed
Lateral wall in second piston head (12)；
The first piston head (11) is cylinder, and lateral wall encloses seal groove every setting three between the upper and lower, from lower upward point
Not Wei the first seal groove (33), the second seal groove (43) and third seal groove (52), in first piston head (11) top surface
The heart is provided with a cross groove, and connector (7) top is bolted in cross groove, combination-compound seal group
Part (9) is fixed in the first seal groove (33), the second seal groove (43) and third seal groove (52).
2. according to claim 1 launch drive piston using combination-compound seal combustion gas, it is characterised in that: described
Combination-composite sealing assembly (9) includes rectangle combination sealing (3), D-shaped combination sealing (4) and O shape sealing (5), and rectangle combination is close
Envelope (3) includes rectangular seal (31) and the first O-ring seals (32), and setting is in the first seal groove (33), so that the first O
Shape sealing ring (32) is contacted with the bottom surface of seal groove (33), and rectangular seal (31) is located at opening ejection cylinder (2) and the first O shape is close
Between seal (32)；D-shaped combination sealing (4) includes D-shaped sealing ring (41) and the second O-ring seals 42, and setting is in the second sealing
In ring recess (43), so that the second O-ring seals 42 are contacted with the second seal groove (43) bottom surface, D-shaped sealing ring (41) is located at opening
It launches between cylinder (2) and the second O-ring seals 42；O shape seals (5) and uses third O-ring seals (51), and setting is sealed in third
In ring recess (52), and contacted with opening ejection cylinder (2)；First is formed between rectangle combination sealing (3) and D-shaped combination sealing (4)
Empty room (62), forms the second empty room 61 between D-shaped combination sealing (4) and O shape sealing (5), O shape seals (5) and the 4th sealing
It encloses and forms third empty room 63 between (101).
3. according to claim 2 launch drive piston using combination-compound seal combustion gas, it is characterised in that: sealing
Circle and the cooperation of seal groove are clearance fit, drive piston and ejection cylinder (2) with being combined into clearance fit, and after making installation
Sealing ring there are certain pre compressed magnitudes.
4. according to claim 1 launch drive piston using combination-compound seal combustion gas, it is characterised in that: described
Second piston head (12) is cylinder, and lateral wall top is provided with the 4th seal groove (102) of a circle, the 4th O-ring seals
(101) it is fixed in the 4th seal groove (102), and is contacted with opening ejection cylinder (2), second piston head (12) bottom surface is provided with one
A T connected in star, the bottom of connector (7) and T connected in star are connected.
5. according to claim 4 launch drive piston using combination-compound seal combustion gas, it is characterised in that: described
Connector (7) includes connecting plate (71), stiffening plate (72) and right-angled trapezium block (73), and stiffening plate (72) is along connecting plate (71)
Mandrel line is fixed on (71) sides of connecting plate, and right-angled trapezium block (73) is fixed on connection along the central axis of connecting plate (71)
The top surface of plate (71) another side, the right angle and connecting plate (71) of right-angled trapezium block (73) is coplanar, and connecting plate (71) is reinforced
Plate (72) and right-angled trapezium block (73) three top surface are constituted in the cross groove of cross plane insertion first piston head (11)；Even
In the T connected in star of at T-shaped insertion second piston head (12) of both fishplate bar (71) and stiffening plate (72) bottom surface structure.
6. according to claim 5 launch drive piston using combination-compound seal combustion gas, it is characterised in that: described
Reinforcing rib is equipped between stiffening plate (72) and connecting plate (71).
7. according to claim 6 launch drive piston using combination-compound seal combustion gas, it is characterised in that: described
Connecting plate (71) length and stiffening plate (72) equal length.
8. according to claim 4 launch drive piston using combination-compound seal combustion gas, it is characterised in that: the T
Type structure (8) includes wedge block (81), T-shaped block (82) and square plate (83), and wedge block (81) is fixed on T-shaped block (82) by joggle
Top surface, wedge block (81) and T-shaped block (82) are fixed on (83) sides of square plate, wedge block along the central axis of square plate (83)
(81) the oblique square plate in top surface (83) direction cuts off a corner block, and square plate (83) another side and connecting plate (71) are equipped with right angle
The face of trapezoid block (73) is connected, so that wedge block (81) cuts off the part of a corner block and the inclined-plane of right-angled trapezium block (73) and matches
It closes.
9. according to claim 8 launch drive piston using combination-compound seal combustion gas, it is characterised in that: described
The length of square plate (83) is less than the length of connecting plate (71).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811574664.3A CN109654224B (en) | 2018-12-21 | 2018-12-21 | Gas ejection transmission piston adopting combined-composite sealing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811574664.3A CN109654224B (en) | 2018-12-21 | 2018-12-21 | Gas ejection transmission piston adopting combined-composite sealing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109654224A true CN109654224A (en) | 2019-04-19 |
| CN109654224B CN109654224B (en) | 2020-06-19 |
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ID=66115438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811574664.3A Active CN109654224B (en) | 2018-12-21 | 2018-12-21 | Gas ejection transmission piston adopting combined-composite sealing |
Country Status (1)
| Country | Link |
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| CN (1) | CN109654224B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101287937A (en) * | 2005-03-18 | 2008-10-15 | 曼柴油机欧洲股份公司 | Piston with hardened ring grooves for a reciprocating internal combustion engine |
| CN103112597A (en) * | 2013-01-29 | 2013-05-22 | 邓西锋 | Transmission rod hidden type steam catapulting system and catapulting control method thereof |
| CN205978417U (en) * | 2016-07-27 | 2017-02-22 | 扬中市永工密封件有限公司 | Polyformaldehyde seals guide ring |
| CN206804196U (en) * | 2017-04-26 | 2017-12-26 | 安庆帝伯格茨活塞环有限公司 | A kind of fired state lower piston component and cylinder sleeve friction testing device |
| CN206917964U (en) * | 2017-06-15 | 2018-01-23 | 江苏恒立液压股份有限公司 | Without rod-type compression cylinder |
| CN207796073U (en) * | 2017-11-29 | 2018-08-31 | 湖北通路汽车零部件股份有限公司 | A kind of high wear-resistant piston insert |
| CN207960790U (en) * | 2018-01-12 | 2018-10-12 | 东莞鑫瑞精密机械零件有限公司 | A kind of piston pushing engineering machinery engine |
-
2018
- 2018-12-21 CN CN201811574664.3A patent/CN109654224B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101287937A (en) * | 2005-03-18 | 2008-10-15 | 曼柴油机欧洲股份公司 | Piston with hardened ring grooves for a reciprocating internal combustion engine |
| CN103112597A (en) * | 2013-01-29 | 2013-05-22 | 邓西锋 | Transmission rod hidden type steam catapulting system and catapulting control method thereof |
| CN205978417U (en) * | 2016-07-27 | 2017-02-22 | 扬中市永工密封件有限公司 | Polyformaldehyde seals guide ring |
| CN206804196U (en) * | 2017-04-26 | 2017-12-26 | 安庆帝伯格茨活塞环有限公司 | A kind of fired state lower piston component and cylinder sleeve friction testing device |
| CN206917964U (en) * | 2017-06-15 | 2018-01-23 | 江苏恒立液压股份有限公司 | Without rod-type compression cylinder |
| CN207796073U (en) * | 2017-11-29 | 2018-08-31 | 湖北通路汽车零部件股份有限公司 | A kind of high wear-resistant piston insert |
| CN207960790U (en) * | 2018-01-12 | 2018-10-12 | 东莞鑫瑞精密机械零件有限公司 | A kind of piston pushing engineering machinery engine |
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| Publication number | Publication date |
|---|---|
| CN109654224B (en) | 2020-06-19 |
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