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WO2018133444A1 - 一种柴油高压燃油喷射器导向套 - Google Patents

一种柴油高压燃油喷射器导向套 Download PDF

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Publication number
WO2018133444A1
WO2018133444A1 PCT/CN2017/103745 CN2017103745W WO2018133444A1 WO 2018133444 A1 WO2018133444 A1 WO 2018133444A1 CN 2017103745 W CN2017103745 W CN 2017103745W WO 2018133444 A1 WO2018133444 A1 WO 2018133444A1
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WIPO (PCT)
Prior art keywords
guide sleeve
hole section
pressure fuel
fuel injector
section
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Application number
PCT/CN2017/103745
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English (en)
French (fr)
Inventor
徐爱明
陈思军
Original Assignee
江苏易实精密科技股份有限公司
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Application filed by 江苏易实精密科技股份有限公司 filed Critical 江苏易实精密科技股份有限公司
Publication of WO2018133444A1 publication Critical patent/WO2018133444A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14

Definitions

  • the utility model relates to a guide sleeve, in particular to a guide sleeve applied to a diesel high-pressure fuel injector.
  • the guide sleeve In the production assembly of automobile parts, the guide sleeve is an indispensable part, especially in the diesel high pressure and then the injector, the guide sleeve needs to be supported by the high pressure fuel injection system plunger, and the existing guide sleeve is generally low carbon free cutting. Steel 1215MS material, this material has low mechanical properties and is prone to damage during use. At the same time, the existing guide sleeve has a groove structure or a thread form. This structure is difficult to process, costly, and has low assembly precision. .
  • the utility model provides a diesel high-pressure fuel injector guide sleeve, which simplifies the outer structure and adopts a smooth surface as an outer surface, which not only reduces the processing difficulty, but also improves the assembly precision.
  • the inner hole adopts a three-stage design, which has high precision when matched with the plunger of the high-pressure fuel injection system, and can effectively improve the service life of the guide sleeve.
  • the technical scheme adopted by the utility model relates to a diesel high-pressure fuel injector guide sleeve, comprising a guide sleeve body, wherein the guide sleeve body is a smooth straight tubular structure, and the inner hole adopts a three-section inner diameter structure, which is sequentially arranged along the axial direction.
  • first inner bore section a first inner bore section, a second inner bore section and a third inner bore section, wherein the first inner bore section and the second inner bore section are transitioned by an inclined transition surface, and the first inner bore section has a bore diameter of 2.7 ⁇ 2.9cm, the length of the hole section is 3.2-3.4cm, the diameter of the second inner hole section is 2.49 ⁇ 2.5cm, the length of the hole section is 3.0-3.2cm, and the diameter of the third inner hole section is 4.01 ⁇ 4.03cm, and the length of the hole section is long. It is 1.2 to 1.5 cm.
  • the outer edge of the third inner bore segment has a 45° inclined surface.
  • the angle between the inclined transition surface and the axial direction is 30 ⁇ 3°.
  • the guide sleeve body is made of ETG100 high carbon alloy steel material.
  • the diesel high-pressure fuel injector guide sleeve disclosed by the utility model adopts the high-carbon alloy steel material of ETG100, so that the guide sleeve has super mechanical performance, meets the lead-free environmental protection requirements of the automobile industry, and the cutting performance is obtained.
  • the outer diameter processing accuracy increased to 0.05mm, directly reducing the processing cost, greatly improving the product cleanliness, while meeting the complex environment of the guide sleeve under high pressure working conditions;
  • the inner hole adopts three Segment structure design, and optimize the design of the inner hole diameter and hole length of each section, improve the inner hole precision to 0.01mm, concentricity is 0.006mm, increase the matching precision of the guide sleeve and the high pressure fuel injection system plunger, and the guide sleeve The life expectancy is increased by more than 2 times.
  • Figure 1 is a side cross-sectional view of the present invention.
  • the diesel high-pressure fuel injector guide sleeve disclosed in the utility model is installed in a diesel high-pressure fuel injector and is used in combination with a system plunger.
  • the structure comprises a guide sleeve body 1 , and the guide sleeve body 1 is adopted.
  • ETG100 high carbon alloy steel material is a smooth straight cylindrical structure. The smooth surface reduces the processing difficulty, improves the cleanliness of the product, and improves the outer diameter machining accuracy.
  • the inner hole of the guide sleeve body 1 adopts a three-stage inner diameter structure, and in the axial direction, the first inner bore section 2, the second inner bore section 3 and the third inner bore section 4, wherein the first inner bore section 2 and the second inner section
  • the hole sections 3 are transitioned by the inclined transition surface 5, and the angle ⁇ between the inclined transition surface 5 and the axial direction is 30 ⁇ 3°, and the diameter of the first inner hole section 2 is 2.7-2.9 cm, and the length of the hole section is long.
  • the diameter of the second inner hole section 3 is 2.49 to 2.5 cm
  • the length of the hole section is 3.0 to 3.2 cm
  • the diameter of the third inner hole section 4 is 4.01 to 4.03 cm
  • the length of the hole section is 1.2 to 1.5.
  • Cm and the outer edge of the third inner hole section has a 45° inclined surface 6 which has a circular chamfer with the connection end of the second inner hole section 3.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

一种柴油高压燃油喷射器导向套，包括导向套本体（1），导向套本体（1）为光面直筒状结构，其内孔采用三段式内径结构，沿轴向依次为第一内孔段（2），第二内孔段（3）及第三内孔段（4）；其中第一内孔段（2）与第二内孔段（3）之间通过倾斜过渡面（5）进行过渡；第一内孔段（2）孔径为2.7~2.9cm，孔段长为3.2~3.4cm；第二内孔段（3）孔径为2.49~2.5cm，孔段长为3.0~3.2cm；第三内孔段（4）孔径为4.01~4.03cm，孔段长为1.2~1.5cm。该柴油高压燃油喷射器导向套不仅降低了加工难度，而且提高了装配精度。

Description

一种柴油高压燃油喷射器导向套 技术领域
本实用新型涉及一种导向套，具体涉及一种应用于柴油高压燃油喷射器的导向套。
背景技术
在汽车零件的生产装配中，导向套是不可缺少的一部分，尤其在柴油机高压然后喷射器内，需要采用导向套与高压燃喷系统柱塞配合支撑，现有的导向套一般采用低碳易切削钢1215MS材料，这种材料机械性能低，使用过程中容易出现损坏，同时现有的导向套其表面结构采用沟槽式或螺纹形式，这种结构毕竟加工难度大，成本高，而且装配精度低。
实用新型内容
实用新型目的：本实用新型为了解决现有技术的不足，提供了一种柴油高压燃油喷射器导向套，简化外形结构，采用光面作为外表面，不仅降低了加工难度，而且提高了装配精度，内孔采用三段式设计，在与高压燃喷系统柱塞配合时精度高，可以有效提高导向套使用寿命。
本实用新型采用的技术方案：一种柴油高压燃油喷射器导向套，包括导向套本体，所述导向套本体为光面直筒状结构，其内孔采用三段式内径结构，沿轴向依次为第一内孔段，第二内孔段及第三内孔段，其中第一内孔段与第二内孔段之间通过倾斜过渡面进行过渡，所述第一内孔段孔径为2.7～2.9cm，孔段长为3.2～3.4cm，第二内孔段孔径为2.49～2.5cm，孔段长为3.0～3.2cm，所述第三内孔段孔径为4.01～4.03cm，孔段长为1.2～1.5cm。
作为优选，所述第三内孔段外边缘具有45°倾斜面。
作为优选，所述倾斜过渡面与轴向的夹角为30±3°。
作为优选，所述导向套本体采用ETG100高碳合金钢材料。
有益效果：本实用新型所揭示的一种柴油高压燃油喷射器导向套，采用ETG100的高碳合金钢材料，使得导向套具有超强机械性能，同时满足汽车行业无铅环保要求，且切削性能得到提高；采用光面直桶式结构，使得外径加工精度增加至0.05mm，直接降低了加工成本，极大地提高产品清洁度，同时满足导向套在高压工作状态下的复杂环境；内孔采用三段式结构设计，且优化设计每一段内孔的孔径及孔段长，提高内孔精度至0.01mm，同心度为0.006mm，增加导向套与高压燃喷系统柱塞等配合精度，同时导向套寿命提升2倍以上。
附图说明
图1为本实用新型的侧面剖视图。
具体实施方式
下面将结合本实用新型的附图，对本实用新型实施例的技术方案进行清楚、完整的描述。
如图1所示，本实用新型所揭示的一种柴油高压燃油喷射器导向套，安装在柴油高压燃油喷射器内与系统柱塞配合使用，其结构包括导向套本体1，导向套本体1采用ETG100高碳合金钢材料，为光面直筒状结构，光面形式降低了加工难度，提高产品的清洁度，同时外径加工精度得以提高。
导向套本体1内孔采用三段式内径结构，沿轴向依次为第一内孔段2，第二内孔段3及第三内孔段4，其中第一内孔段2与第二内孔段3之间通过倾斜过渡面5进行过渡，且该倾斜过渡面5与轴向的夹角α为30±3°，所述第一内孔段2孔径为2.7～2.9cm，孔段长为3.2～3.4cm，第二内孔段3孔径为2.49～2.5cm，孔段长为3.0～3.2cm，所述第三内孔段4孔径为4.01～4.03cm，孔段长为1.2～1.5cm，且第三内孔段外边缘具有45°倾斜面6，其与第二内孔段3连接端具有圆弧倒角。
本实用新型的技术内容及技术特征已揭示如上，然而熟悉本领域的技术人员仍可能基于本实用新型的教示及揭示而作种种不背离本实用新型精神的替换及修饰，因此，本实用新型保护范围应不限于实施例所揭示的内容，而应包括各种不背离本实用新型的替换及修饰，并为本专利申请权利要求所涵盖。

Claims (4)

  1. 一种柴油高压燃油喷射器导向套，包括导向套本体，其特征在于：所述导向套本体为光面直筒状结构，其内孔采用三段式内径结构，沿轴向依次为第一内孔段，第二内孔段及第三内孔段，其中第一内孔段与第二内孔段之间通过倾斜过渡面进行过渡，所述第一内孔段孔径为2.7～2.9cm，孔段长为3.2～3.4cm，第二内孔段孔径为2.49～2.5cm，孔段长为3.0～3.2cm，所述第三内孔段孔径为4.01～4.03cm，孔段长为1.2～1.5cm。
  2. 根据权利要求1所述的一种柴油高压燃油喷射器导向套，其特征在于：所述第三内孔段外边缘具有45°倾斜面。
  3. 根据权利要求1所述的一种柴油高压燃油喷射器导向套，其特征在于：所述倾斜过渡面与轴向的夹角为30±3°。
  4. 根据权利要求1所述的一种柴油高压燃油喷射器导向套，其特征在于：所述导向套本体采用ETG100高碳合金钢材料。
PCT/CN2017/103745 2017-01-18 2017-09-27 一种柴油高压燃油喷射器导向套 WO2018133444A1 (zh)

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Publication number Priority date Publication date Assignee Title
CN206487579U (zh) * 2017-01-18 2017-09-12 江苏易实精密科技股份有限公司 一种柴油高压燃油喷射器导向套

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3100725A1 (de) * 1980-12-16 1982-07-01 Gebrüder Sulzer AG, 8401 Winterthur "einrichtung zur gesteuerten foerderung des brennstoffs in einer brennkraftmaschine"
CN88100522A (zh) * 1987-01-30 1988-11-23 诺瓦工厂股份公司 用于内燃机的燃油喷射泵
CN101377181A (zh) * 2007-08-31 2009-03-04 瓦特西拉瑞士股份有限公司 用于喷射燃料的喷嘴
CN101749159A (zh) * 2010-02-08 2010-06-23 苏州麦格特发动机有限公司 柴油发动机燃油喷射电控泵喷嘴
CN201610814U (zh) * 2010-02-08 2010-10-20 苏州麦格特发动机有限公司 柴油发动机燃油喷射电控泵喷嘴
CN206487579U (zh) * 2017-01-18 2017-09-12 江苏易实精密科技股份有限公司 一种柴油高压燃油喷射器导向套

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3100725A1 (de) * 1980-12-16 1982-07-01 Gebrüder Sulzer AG, 8401 Winterthur "einrichtung zur gesteuerten foerderung des brennstoffs in einer brennkraftmaschine"
CN88100522A (zh) * 1987-01-30 1988-11-23 诺瓦工厂股份公司 用于内燃机的燃油喷射泵
CN101377181A (zh) * 2007-08-31 2009-03-04 瓦特西拉瑞士股份有限公司 用于喷射燃料的喷嘴
CN101749159A (zh) * 2010-02-08 2010-06-23 苏州麦格特发动机有限公司 柴油发动机燃油喷射电控泵喷嘴
CN201610814U (zh) * 2010-02-08 2010-10-20 苏州麦格特发动机有限公司 柴油发动机燃油喷射电控泵喷嘴
CN206487579U (zh) * 2017-01-18 2017-09-12 江苏易实精密科技股份有限公司 一种柴油高压燃油喷射器导向套

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