CN203614302U - Fuel injector bush based on shape memory effect - Google Patents
Fuel injector bush based on shape memory effect Download PDFInfo
- Publication number
- CN203614302U CN203614302U CN201320810000.9U CN201320810000U CN203614302U CN 203614302 U CN203614302 U CN 203614302U CN 201320810000 U CN201320810000 U CN 201320810000U CN 203614302 U CN203614302 U CN 203614302U
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- CN
- China
- Prior art keywords
- fuel injector
- oil sprayer
- groove
- memory alloy
- alloy ring
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
Links
- 230000003446 memory effect Effects 0.000 title claims abstract description 14
- 239000000446 fuel Substances 0.000 title abstract description 14
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims abstract description 34
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 239000000956 alloy Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910018643 Mn—Si Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 238000007789 sealing Methods 0.000 abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- 238000003825 pressing Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000006073 displacement reaction Methods 0.000 abstract 1
- 238000006748 scratching Methods 0.000 abstract 1
- 230000002393 scratching effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 229910001369 Brass Inorganic materials 0.000 description 4
- 239000010951 brass Substances 0.000 description 4
- 239000000498 cooling water Substances 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 2
- 238000010587 phase diagram Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
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Abstract
The utility model discloses a fuel injector bush based on a shape memory effect. The fuel injector bush comprises a fuel injector bush body which is arranged outside a fuel injector in a sleeved mode and can seal a fuel injector hole of a cylinder cover. The fuel injector bush body comprises a cooling section and a sealing section connected with the fuel injector hole of the cylinder cover in a sealed mode, a groove is formed in the inner ring of the sealing section, a memory alloy ring is disposed in the groove, the groove carries out displacement limiting on the memory alloy ring after the memory alloy ring restores a free state, accordingly the memory alloy ring has certain pressure stress on the sealing section of the bush body, and the pressure stress is transmitted to the fuel injector and the cylinder cover through the inner wall and the outer wall of the sealing section respectively to achieve the aim of sealing. Besides, the inner wall and the outer wall of the sealing section are gradually attached to the fuel injector and the cylinder cover, so that small gaps caused by surface burrs and micro protrusions are eliminated, and the aim of sealing is further achieved. A pressing technology is replaced, water leakage caused by deviated pressing, breaking, bush damage due to scratching of cylinder cover burrs and other reasons is reduced, and besides, the fuel injector bush is simple in structure and good in sealing performance.
Description
Technical field
The utility model relates to a kind of oil sprayer bushing based on shape memory effect.
Background technique
The oil sprayer of diesel engine is arranged in cylinder head by oil sprayer bushing, and the Main Function of oil sprayer bushing is for to be fixed on oil sprayer in cylinder head fuel injector hole, and the heat of oil sprayer is passed to cooling water, has sealing, cooling effect.
Existing oil sprayer bushing processing, assembly process complexity, rate of fault is high, because oil sprayer will guarantee that thermal diffusivity is good, lagging material is generally made with brass, but the hardness of brass is lower, easily in the process being pressed into, is scratched to cause by burr and leaks, press-fit in process due to complex process, lining is easy to be crushed, or is pressed into rear deflection, causes leaking.Brass has stress corrosion inclination in addition, press fit into lining soon and stress corrosion easily occurs crack, and the method that reduces stress corrosion inclination is to reduce the hardness of brass, but lower hardness causes the assembling moment of lining and oil sprayer to guarantee.
Model utility content
The technical problems to be solved in the utility model is for above-mentioned defect, the oil sprayer bushing based on shape memory effect that a kind of good sealing effect is provided, avoids lining to be out of shape.
In order to solve the problems of the technologies described above, be sleeved on the oil sprayer bushing body that oil sprayer is outside and cylinder head fuel injector hole can be sealed of the present utility model comprising, the seal section that described oil sprayer bushing body comprises cooling section and is tightly connected with cylinder head fuel injector hole, its structural feature is to be equipped with groove in described seal section, and memory alloy ring is installed in described groove.
The lower surface of described groove selfsealings section extends internally, and the degree of depth of groove and the length of seal section adapt.
Described groove is positioned at the intermediate portion in seal section cross section.
The radial width of described groove is 1/3rd to 1/2nd of seal section thickness.
The thickness of described memory alloy ring and the radial width of groove adapt.
Described memory alloy ring is made up of Fe-Mn-Si base memorial alloy.
Described oil sprayer bushing body is made up of red copper material.
Adopt the oil sprayer bushing based on shape memory effect of such scheme compared with prior art to have the following advantages: in the seal section groove of oil sprayer bushing, memory alloy ring to be installed, memory alloy ring carries out sub zero treatment before assembling, it is undergone phase transition, ripple disappears, and is convenient to be fitted in groove.The memory alloy ring generation reverse transformation that is heated, returning to surface has the free state of raised corrugations, groove carries out deformation restriction to memory alloy ring, thereby cause memory alloy ring to produce certain pressure stress to the seal section of lining, this pressure stress passes to respectively oil sprayer and cylinder cap by seal section inside and outside wall, reaches the object of sealing; In addition, the inside and outside wall of seal section is fitted with oil sprayer and cylinder cap gradually, and memory alloy produces pressure to groove, and burr and the microprotrusion of groove to inboard wall of cylinder cover produces pressure, thereby eliminate the little gap of causing due to surperficial burr, microprotrusion, further reach the object of sealing; The seal section that memory alloy is installed is pressed into cylinder cap with less magnitude of interference, utilize the anamorphic effect of memory alloy, the press-loading process that alternative magnitude of interference is larger, thereby reduce the water leakage phenomenon that lining is pressed partially, lining is caused by reasons such as cylinder cap burr scuffings, and the utility model is simple in structure, good airproof performance, easy to use.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail:
Fig. 1 is structural representation of the present utility model;
Fig. 2 is use phase diagram of the present utility model;
Fig. 3 is the service state figure of memory alloy ring;
Fig. 4 is the phase diagram before the assembling of memory alloy ring.
Embodiment
As depicted in figs. 1 and 2, should comprise the oil sprayer bushing body 2 that is sleeved on oil sprayer 1 outside and cylinder cap 3 oil injector holes can be sealed by the oil sprayer bushing based on shape memory effect, the seal section 22 that oil sprayer bushing body 2 comprises cooling section 21 and is tightly connected with cylinder cap 3 oil injector holes, cooling section 21 contacts with the water cavity 4 of cylinder cap 3, can prevent that the cooling water in water cavity 4 from entering firing chamber, the heat of oil sprayer 1 can also be passed to cooling water.In seal section 22, be equipped with groove 23, memory alloy ring 24 is installed in groove 23.The lower surface of groove 23 selfsealings sections 22 extends internally, and the length of the degree of depth of groove 23 and seal section 22 adapts.Groove 23 is positioned at the intermediate portion in seal section 22 cross sections, makes oil sprayer 1 and cylinder cap 3 stressed evenly.The radial width of groove 23 is 1/3rd to 1/2nd of seal section 22 thickness.In the present embodiment, memory alloy ring 24 is annular, and the radial width of the thickness of memory alloy ring 24 and groove 23 adapts, thereby memory alloy ring 24 is overlapped and installed in groove 23.Memory alloy ring 24 in the present embodiment is selected Fe-Mn-Si base memorial alloy ring, and this lower cost for material can within the scope of 100-170 ℃, change in shape occur.The processing of memory alloy ring 24 can be taked the mode moulding such as passage extruding, forge hot, carries out cooling processing it is undergone phase transition after moulding, is cold working to its assembled form.In the present embodiment, oil sprayer bushing body 2 is made up of red copper material, and when hot working, plasticity is better, can reduce assembling impacting force when assembling, effectively prevents from pressing partially manifesting.
As Fig. 1, memory alloy ring 24 shown in Fig. 3 and Fig. 4 in the present embodiment is ripple state under free state, before assembling, marmem ring 24 is carried out to sub zero treatment, under low-temperature condition, there is martensitic phase and become in memory alloy material, marmem ring 24 external wavinesses are disappeared, be smooth shape, be convenient to by its with interference fit in the groove of seal section 22, then the seal section 22 that is equipped with marmem ring 24 is coordinated with cylinder cap 3 oil injector holes, after diesel engine starting a period of time, remember the alloy hoop 24 generation reverse transformation that is heated, returning to surface has the free state of raised corrugations, because seal section 22 grooves are out of shape restriction to it, memory alloy ring 24 shapes cannot reach the size while freely recovery, thereby cause memory alloy ring 24 to produce certain pressure stress to seal section 22, this pressure stress passes to oil sprayer 1 by the inwall of seal section 22, pass to cylinder cap 3 by the outer wall of seal section 22, reach the object of sealing.The inside and outside wall of seal section 22 is fitted with oil sprayer 1 and cylinder cap 3 gradually in addition, memory alloy produces pressure to groove 23, burr and the microprotrusion of groove 23 to inboard wall of cylinder cover produces pressure, make burr, microprotrusion along with the increase of pressure is filled up or wrapped up by memory alloy ring 24 gradually, laminating closely, eliminate because surperficial burr, microprotrusion are brought micro-gap, further reach the object of sealing.The seal section that memory alloy ring 24 is installed is pressed into cylinder cap with less magnitude of interference, utilizes the anamorphic effect of memory alloy, the press-loading process that alternative magnitude of interference is larger, thus reduce the water leakage phenomenon that lining is pressed partially, lining is caused by reasons such as cylinder cap burr scuffings.Because groove 23 is positioned at the middle part of seal section 22, therefore this distribution of the compressive stress is even, reaches better sealing effect.
The utility model is not limited to above-mentioned embodiment, and those skilled in the art, not departing under the prerequisite of spirit and scope of the present utility model, can do some changes and modification.Protection domain of the present utility model should be as the criterion with claim of the present utility model.
Claims (7)
1. the oil sprayer bushing based on shape memory effect, comprise and be sleeved on the oil sprayer bushing body (2) that oil sprayer (1) is outside and cylinder cap (3) oil injector hole can be sealed, the seal section (22) that described oil sprayer bushing body (2) comprises cooling section (21) and is tightly connected with cylinder cap (3) oil injector hole, it is characterized in that: in described seal section (22), be equipped with groove (23), memory alloy ring (24) is installed in described groove (23).
2. the oil sprayer bushing based on shape memory effect according to claim 1, is characterized in that: the lower surface of described groove (23) selfsealings section (22) extends internally, and the length of the degree of depth of groove (23) and seal section (22) adapts.
3. the oil sprayer bushing based on shape memory effect according to claim 1, is characterized in that: described groove (23) is positioned at the intermediate portion in seal section (22) cross section.
4. the oil sprayer bushing based on shape memory effect according to claim 1, is characterized in that: the radial width of described groove (23) is 1/3rd to 1/2nd of seal section (22) thickness.
5. according to the oil sprayer bushing based on shape memory effect described in any one in claim 1-4, it is characterized in that: the radial width of the thickness of described memory alloy ring (24) and groove (23) adapts.
6. the oil sprayer bushing based on shape memory effect according to claim 5, is characterized in that: described memory alloy ring (24) is made up of Fe-Mn-Si base memorial alloy.
7. the oil sprayer bushing based on shape memory effect according to claim 5, is characterized in that: described oil sprayer bushing body (2) is made up of red copper material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320810000.9U CN203614302U (en) | 2013-12-07 | 2013-12-07 | Fuel injector bush based on shape memory effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320810000.9U CN203614302U (en) | 2013-12-07 | 2013-12-07 | Fuel injector bush based on shape memory effect |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203614302U true CN203614302U (en) | 2014-05-28 |
Family
ID=50766953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320810000.9U Expired - Fee Related CN203614302U (en) | 2013-12-07 | 2013-12-07 | Fuel injector bush based on shape memory effect |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203614302U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111673954A (en) * | 2020-06-18 | 2020-09-18 | 北京通嘉鼎元科技有限公司 | Machining method of sealing element, sealing element and vacuum pump |
-
2013
- 2013-12-07 CN CN201320810000.9U patent/CN203614302U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111673954A (en) * | 2020-06-18 | 2020-09-18 | 北京通嘉鼎元科技有限公司 | Machining method of sealing element, sealing element and vacuum pump |
| CN111673954B (en) * | 2020-06-18 | 2022-12-16 | 北京通嘉鼎元科技有限公司 | Machining method of sealing element, sealing element and vacuum pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140528 |