WO2016037498A1 - 一种多缸柴油机供油提前角的调整装置及方法 - Google Patents

一种多缸柴油机供油提前角的调整装置及方法 Download PDF

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WO2016037498A1
WO2016037498A1 PCT/CN2015/080453 CN2015080453W WO2016037498A1 WO 2016037498 A1 WO2016037498 A1 WO 2016037498A1 CN 2015080453 W CN2015080453 W CN 2015080453W WO 2016037498 A1 WO2016037498 A1 WO 2016037498A1
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Prior art keywords
advance angle
diesel engine
pump
pressure oil
supply advance
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PCT/CN2015/080453
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English (en)
French (fr)
Inventor
张建
唐文献
晏飞
苏世杰
李钦奉
齐继阳
朱永梅
刘焱
姚凯
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江苏科技大学
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Application filed by 江苏科技大学 filed Critical 江苏科技大学
Priority to US15/316,757 priority Critical patent/US9926855B2/en
Publication of WO2016037498A1 publication Critical patent/WO2016037498A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D1/00—Controlling fuel-injection pumps, e.g. of high pressure injection type
    • F02D1/16—Adjustment of injection timing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D1/00—Controlling fuel-injection pumps, e.g. of high pressure injection type
    • F02D1/16—Adjustment of injection timing
    • F02D1/162—Adjustment of injection timing by mechanical means dependent on engine speed for angular adjustment of driving and driven shafts
    • 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
    • F02M39/00—Arrangements of fuel-injection apparatus with respect to engines; Pump drives adapted to such arrangements
    • F02M39/02—Arrangements of fuel-injection apparatus to facilitate the driving of pumps; Arrangements of fuel-injection pumps; Pump drives
    • 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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/48—Assembling; Disassembling; Replacing
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8092—Fuel injection apparatus manufacture, repair or assembly adjusting or calibration

Definitions

  • the invention relates to a device and a method for adjusting an oil supply advance angle of a diesel engine, in particular to a device and a method for adjusting an oil supply advance angle of a multi-cylinder diesel engine, and belongs to the technical field of marine diesel engines.
  • the diesel fuel supply advance angle refers to the crankshaft rotation angle from the position where the first cylinder of the diesel engine is located to the top dead center of the piston when the first cylinder of the fuel injection pump starts to supply oil, which is called the oil supply advance angle.
  • the fuel supply advance angle is too large. Since the diesel fuel is injected under the condition that the air temperature in the cylinder is low, the mixed gas formation conditions are poor, the combustion period is long, the engine is rough, the combustion is incomplete, and some carbon elements are suspended. Exhaust in the exhaust gas, causing the exhaust pipe to emit black smoke; power is reduced, fuel consumption is increased. If the fuel supply advance angle is too small, the combustion process is delayed until the top dead center of the piston, the highest temperature and pressure can be achieved, and the thermal efficiency is also significantly reduced.
  • the unburned part of the diesel oil forms a white oil mist and is discharged from the exhaust pipe. That is, white smoke; causing difficulty in starting the engine, reducing the working pressure, increasing heat loss, reducing power, increasing fuel consumption, and overheating the engine.
  • the rotating pump body method loosen the three fixing screws connected to the right end surface of the gear chamber by the high pressure oil pump flange, and rotate the high pressure oil pump casing to change the position of the high pressure oil pump plunger relative to the cam of the high pressure oil pump, thereby changing The oil supply advance angle.
  • the method can theoretically realize the stepless adjustment of the fuel supply advance angle, since the high pressure oil pump body is mounted on the right end surface of the gear chamber, the end surface is also the end surface of the gear chamber connected to the fuselage, and the pump is restricted by the structure. The distance between the body and the fuselage is relatively close. It is inconvenient to loosen or tighten the fixing screw, and the oil supply angle is adjusted by manually rotating the high pressure oil pump casing.
  • This method has higher technical requirements for the operator; therefore, the rotary pump body method is used. Adjusting the fuel supply advance angle of the diesel engine not only has high labor intensity, low work efficiency, but also has high technical requirements for the operator.
  • the application number is 200720037621.2, the utility model patent named "Engine Fuel Injection Pump Installation and Adjustment Device”, and the advance angle adjustment method is the rotary pump body method.
  • the object of the present invention is to overcome the problems and defects of the prior art multi-cylinder diesel engine adopting the rotary pump body method to adjust the oil supply advance angle to the operator with high technical requirements, low work efficiency and high labor intensity; and provide a simple operation and high work efficiency.
  • Multi-cylinder diesel engine oil supply advance angle adjustment device and its adjustment method are provided.
  • a multi-cylinder diesel engine oil supply advance angle adjusting device comprises a gear chamber assembled in a multi-cylinder diesel engine, a connecting plate and a high-pressure oil pump disposed on a left end surface of the gear outdoor, the spindle end of the high-pressure oil pump extending into the gear chamber Fixedly connected to the connecting plate; the fuel injection pump timing gear is fixedly connected to the right end surface of the connecting plate, and the right end surface of the fuel injection pump timing gear is provided with three equal-divided distances from the center in the circumferential direction a circular arc-shaped hole, an annular pad is placed on the waist hole; the fuel injection pump timing gear is fixedly connected to the right end surface of the connecting plate through a ring-shaped pad and a waist hole; the fuel injection pump The arc-shaped hole provided on the right end surface of the timing gear is at least one of the counterclockwise ends of the waist hole a through hole is further disposed at a distance from the waist hole; the round hole is mounted with a T-nut having a nut axis
  • the object of the present invention can also be further achieved by the following technical measures.
  • the aforementioned connecting disc is a stepped disc structure, and the fuel injection pump timing gear is disposed on the step of the connecting disc.
  • the aforementioned waist hole has an arc of not more than 30°.
  • a positioning blind hole for supporting the screw support is further provided on the outer circumference of the aforementioned annular pad.
  • a lock nut is further disposed on the support screw.
  • a counterbore is further provided on a lower end surface of the fuel injection pump timing gear end surface which is provided through a circular hole.
  • a method for adjusting an oil supply advance angle of a diesel engine includes the following steps:
  • the invention has the advantages that the oil supply advance angle is convenient to adjust and the adjustment precision is high.
  • the diesel engine adjustment fuel supply advance angle is changed from the pump body of the original high-pressure oil pump to the pump shaft of the high-pressure oil pump, and can be directly observed when the pump shaft is rotated.
  • the starting position of the oil supply port increases the accuracy of the oil supply advance angle adjustment; in addition, the operation position is changed from the back of the gear chamber to the front of the gear chamber to make the operation more convenient.
  • the connecting plate on the main shaft of the high pressure oil pump is separated from the fuel injection pump timing gear, only after the high pressure oil pump starts to supply the oil position.
  • the fuel injection pump timing gear is fixed to the connecting plate on the high pressure oil pump main shaft, so the installation of the fuel injection pump timing gear may not be in the positive position.
  • the present invention uses the support screw along the rotation direction to support the structure of the fastening screw in one direction, so that the fuel injection pump timing gear and the connection plate can be opposite. The position remains the same and meets the product requirements.
  • Figure 1 is an end view of the gear chamber of the diesel engine of the present invention
  • Figure 2 is a cross-sectional view taken along line A-A of Figure 1, which is a schematic view of the construction and assembly of the apparatus of the present invention
  • Figure 3 is a wheel train diagram of the gear chamber of Figure 1;
  • Figure 4 is a cross-sectional view taken along line B-B of Figure 3;
  • Figure 5 is a flow chart of the method of the present invention.
  • inside and outside means that the direction toward the inside of the device is internal with respect to the device itself, and vice versa, rather than the specific definition of the device mechanism of the present invention.
  • left and right means that when the reader is facing the drawing, the left side of the reader is left, and the right side of the reader is right, rather than the specific limitation of the device mechanism of the present invention. .
  • connection may be a direct connection between components or a component. Indirect connection between other components.
  • a multi-cylinder diesel engine oil supply advance angle adjustment device includes a gear chamber 3, a fuel injection pump timing gear 6, a connecting plate 5, a fastening screw 62, a high pressure oil pump 2, a high pressure oil pump 2 is fixed on the outer left end surface of the gear chamber 3, the main shaft end 22 of the high pressure oil pump 2 extends into the gear chamber 3, and the end 22 is fixedly connected to the connecting plate 5 by the key 23 and the nut 24; the timing of the fuel injection pump gear 6 On the end surface, three circular arc-shaped holes 61 are formed in the circumferential direction, and an annular pad 63 is placed on the waist hole 61; the fastening screw 62 passes through the annular pad 63 and the waist hole 61.
  • the fuel injection pump timing gear 6 is fixed on the right end surface of the connecting plate 5; on the right end surface of the fuel injection pump timing gear 6, a counterclockwise end of one of the waist holes 61 is provided with a through hole 68; a T-shaped nut 65 having a screw hole axis parallel to the end surface of the fuel injection pump timing gear 6 is inserted into the circular hole 68; and the T-nut 65 is provided with a supporting screw 67 supported on the annular pad 63.
  • the end of the circular hole 68 into which the T-nut 65 is inserted is further provided with a counterbore 681, and the T-nut 65 is connected to the fuel injection pump timing gear 6 by the retaining ring 69 in the counterbore 681.
  • the T nut 65 can be rotated along the axis of the circular hole 68; the annular pad 63 is provided with a positioning hole 631 on the outer circumference thereof, and the support screw 67 is supported in the positioning hole 631 of the annular pad 63, and the lock nut 66 is locked.
  • the screw 67 is supported to lock the oil supply advance angle.
  • a method for adjusting an adjustment mechanism of a diesel fuel supply advance angle includes the following steps:
  • the advanceer pointer 311 corresponds to the advance angle scale 41 of the crankshaft pulley 6, which is the diesel fuel supply advance angle; when the fuel supply advance angle is not equal to 23°, the adjustment is performed according to step 3; when the fuel supply advance angle is When it is equal to 23°, the support screw 67 is supported in the positioning hole 631 of the annular pad 63, and the support screw 67 is locked by the lock nut 66, thereby locking the diesel fuel supply advance angle.

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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

一种多缸柴油机供油提前角的调整装置，包括装配在柴油机中的齿轮室（3）、连接盘（5）和安置在齿轮室外左端面上的高压油泵（2），高压油泵（2）的主轴端头伸入齿轮室（3）内与连接盘（5）连接；连接盘（5）的右端面上连接有喷油泵正时齿轮（6），喷油泵正时齿轮（6）的右端面上距离中心沿圆周方向设有三个等分贯穿的圆弧腰形孔（61），在腰形孔（61）上放置有环形垫铁（63）；至少在一个腰形孔（61）的逆时针方向的末端且距离腰形孔（61）处还设有一贯穿的圆孔（68）；圆孔（68）安装有一只螺母轴线与喷油泵正时齿轮（6）端面平行的T形螺母（65）；T形螺母（65）内设有一钉头顶支在环形垫铁（63）上的支撑螺钉（67）。还公开了一种多缸柴油机供油提前角的调整方法。该调整装置和调整方法便于调整供油提前角，且调整精度高。

Description

一种多缸柴油机供油提前角的调整装置及方法 技术领域
本发明涉及一种柴油机供油提前角的调整装置及方法，特别涉及一种多缸柴油机供油提前角的调整装置及方法，属于船用柴油机技术领域。
背景技术
柴油机供油提前角，是指喷油泵第一缸柱塞开始供油时，柴油机第一缸曲轴所处的位置至活塞到达上死点的曲轴转角，称为供油提前角。供油提前角过大，由于柴油是在气缸内的空气温度较低的情况下喷入的，混合气形成条件差，滞燃期较长，发动机出现工作粗暴，燃烧不完全，部分碳元素悬浮在废气中排出，致使排气管冒黑烟；功率降低，油耗增大。供油提前角过小，将燃烧过程延迟到活塞上止点以后，所能达到的最高温度和压力较低，热效率也显著下降，未燃烧的部分柴油形成白色的油雾从排气管排出，即冒白烟；造成发动机起动困难，工作压力降低，热损失增多，功率降低，油耗增大，发动机过热。
因此，柴油机供油提前角调整得是否准确，不仅影响柴油机的输出功率和油耗等性能，而且还影响着柴油机的排放。
目前多缸柴油机供油提前角调整方法主要有两种，其一，调节花盘法：打开调整口盖,摊开锁片,拧出花键接盘的两个固定螺钉切忌不要碰转了花键接盘。将固定螺钉插入另一对孔使花键接盘连同喷油泵花键套管一起拨转一个角度。该方法属于有级调节，调整精度低，无法满足目前柴油机对油耗和排放的高要求，因此该方法在市场上被逐步淘汰。
其二，转动泵体法：松开高压油泵法兰连接于齿轮室右端面上的三个固定螺钉,转动高压油泵壳体,以改变高压油泵柱塞相对于高压油泵内凸轮的位置,从而改变供油提前角。该方法虽然在理论上能够实现供油提前角的无级调节，但是，由于高压油泵泵体安装在齿轮室的右端面上，此端面也是齿轮室与机身连接的端面，因受结构限制泵体与机身之间距离较近，松开或拧紧固定螺钉很不方便，且靠人工转动高压油泵壳体来调整供油角度，该方法对操作者技术要求较高；因此用转动泵体法调整柴油机供油提前角不仅劳动强度大，工作效率低，而且对操作者技术要求较高。
申请号为200720037621.2，名称为《发动机喷油泵安装调整装置》的实用新型专利，其提前角调整方法即为转动泵体法。
发明内容
本发明的目的是为了克服现有多缸柴油机采用转动泵体法调整供油提前角对操作人员技术要求高，工作效率低和劳动强度大的问题和缺陷；提供一种操作简单，工作高效的多缸柴油机供油提前角的调整装置及其调整方法。
本发明的目的通过以下技术方案予以实现。
一种多缸柴油机供油提前角的调整装置，包括装配在多缸柴油机中的齿轮室、连接盘和安置在齿轮室外左端面上的高压油泵，所述高压油泵的主轴端头伸入齿轮室内与所述连接盘固定连接；所述连接盘的右端面上还固定连接有喷油泵正时齿轮，所述喷油泵正时齿轮的右端面上，距离中心沿圆周方向设有三个等分贯穿的圆弧腰形孔，在腰形孔上放置有环形垫鉄；采用紧固螺钉穿过环形垫鉄、腰形孔将喷油泵正时齿轮固定连接在连接盘的右端面上；所述喷油泵正时齿轮的右端面上设有的圆弧腰形孔中至少在一个腰形孔的逆时针方向的末 端且距离腰形孔处还设有一贯穿的圆孔；所述圆孔安装有一只螺母轴线与喷油泵正时齿轮端面平行的T形螺母；所述T形螺母内设有一钉头顶支在环形垫鉄上的支撑螺钉。
本发明的目的还可以通过以下技术措施来进一步实现。
前述所述连接盘为台阶形盘结构，所述喷油泵正时齿轮安置在连接盘的台阶上。
前述所述腰形孔的弧度不大于30°。
前述所述环形垫鉄的外圆周上还设有用于支撑螺钉支撑的定位盲孔。
前述所述支撑螺钉上还设有锁紧螺母。
前述所述喷油泵正时齿轮端面上设有的一贯穿圆孔的下端面上还设有沉孔。
为了达到上述目的，本发明采用的另一个技术方案是：
一种柴油机供油提前角的调整方法，包括以下步骤：
1、调整前的准备；拆下柴油机缸头盖罩、提前器盖，拆开高压油泵第一缸的高压油管管接头，给高压油泵输油、排气。
2、设定供油提前角；转动曲轴皮带轮，观察柴油机进、排气门处于闭合状态下，活塞压缩至上死点前，将曲轴皮带轮上对准提前角指针的提前角刻度停留在柴油机说明书规定的角度上。
3、调整高压油泵第一缸柱塞起始供油点；松开喷油泵正时齿轮的支撑螺钉和紧固螺钉，利用曲轴正时齿轮锁定喷油泵正时齿轮，利用高压油泵主轴顶端的螺母重复摆动高压油泵主轴，在高压油泵供油口处查看高压油泵主轴顺时针方向转动时，第一缸柱塞出油的起始位置，位置确定后拧紧喷油泵正时齿轮的 紧固螺钉。
4、检查供油提前角；在供油提前角周围，重复转动曲轴皮带轮，在高压油泵供油口处查看曲轴皮带轮顺时针方向转动，高压油泵第一缸柱塞起始出油时，提前器指针对应在曲轴皮带轮上的提前角刻度，该对应刻度即为柴油机供油提前角；当该供油提前角与步骤2设置的角度不同时，按步骤3重新调整；当该供油提前角与步骤2设置的角度相同时，将支撑螺钉支撑在环形垫鉄的定位孔内，利用锁紧螺母锁紧支撑螺钉，从而锁定柴油机供油提前角。
5、复位；将柴油机缸头盖罩、提前器盖重新安装固定，将高压油泵第一缸的高压油管接头重新安装到供油口上，供油提前角设置完毕。
本发明的优点在于：供油提前角调整方便，调整精度高。通过对原多缸柴油机喷油泵正时齿轮结构的重新设计，使得柴油机调整供油提前角由原来转动高压油泵的泵体改为转动高压油泵的泵轴，且在转动泵轴时可以直接观察到供油口供油的起始位置，从而提高了供油提前角调整的精度；此外操作位置从原来在齿轮室的背面转为在齿轮室的正面操作，使操作更加方便。由于在调整高压油泵第一缸柱塞的供油点时，高压油泵的主轴上的连接盘与喷油泵正时齿轮是处于分开状态，只是在高压油泵起始供油的位置找到后，才将喷油泵正时齿轮与高压油泵主轴上的连接盘固定到一起，因此，对喷油泵正时齿轮的安装可以不在正时位置。
由于喷油泵正时齿轮在工作中仅作从动顺时针转动，因此本发明采用支撑螺钉沿着转动方向，单向支撑紧固螺钉的结构，就能够使喷油泵正时齿轮与连接盘的相对位置保持不变，满足产品使用要求。
本发明的优点和特点，将通过下面优选实施例的非限制性说明进行图示和 解释，这些实施例，是参照附图仅作为例子给出的。
附图说明
图1是本发明柴油机齿轮室端面视图，
图2是图1的A-A剖面图，即本发明装置的构造及装配示意图；
图3是图1齿轮室内的轮系图；
图4是图3的B-B剖面图；
图5是本发明方法的流程框图；
图中：1、气缸盖罩，2、高压油泵，21、管接头，211、供油口，22、主轴，23、键，24、螺母，3、齿轮室，31、齿轮室盖，311、提前角指针，32、提前器盖，4、曲轴皮带轮，41、提前角刻度，5、连接盘，6、喷油泵正时齿轮，61、腰形槽，62、紧固螺钉，63、环形垫鉄，631、定位孔，65、T形螺母，66、锁紧螺母，67、支撑螺钉，68、圆孔，681、沉孔，69、挡圈，7、曲轴正时齿轮。
具体实施方式
下面结合附图和实施例对本发明作进一步说明：
为使本发明的目的和技术方案更加清楚，下面将结合附图和实施例对本发明的技术方案进行清楚、完整地描述。
本发明中所述的“内、外”的含义指的是相对于装置本身而言，指向装置内部的方向为内，反之为外，而非对本发明的装置机构的特定限定。
本发明中所述的“左、右”的含义指的是阅读者正对附图时，阅读者的左边即为左，阅读者的右边即为右，而非对本发明的装置机构的特定限定。
本发明中所述的“连接”的含义可以是部件之间的直接连接也可以是部件 间通过其它部件的间接连接。
本发明中所述的“前、后”的含义指的是阅读者正对附图时，离阅读者近的即为前，离阅读者远的即为后，而非对本发明的装置的特定限定。
如图2、3、4所示，一种多缸柴油机供油提前角的调整装置，包含齿轮室3、喷油泵正时齿轮6、连接盘5、紧固螺钉62、高压油泵2，高压油泵2固定在齿轮室3外左端面上，高压油泵2主轴端22伸入齿轮室3内，其端头22通过键23、螺母24固定连接着连接盘5；所述喷油泵正时齿轮6的端面上，沿圆周方向设有三只等分贯穿的圆弧腰形孔61，在腰形孔61上放置着环形垫鉄63；所述紧固螺钉62穿过环形垫鉄63、腰形孔61将喷油泵正时齿轮6固定在连接盘5的右端面上；所述喷油泵正时齿轮6的右端面上，其中一个腰形孔61的逆时针方向的端头上设有一贯穿的圆孔68；所述圆孔68内插入一只螺孔轴线与喷油泵正时齿轮6端面平行的T形螺母65；所述T形螺母65内设有支撑螺钉67支撑在环形垫鉄63上。
如图4所示，T形螺母65插入的圆孔68的端头处还设有沉孔681，在沉孔681内利用挡圈69将T形螺母65连接在喷油泵正时齿轮6上，使T形螺母65可以沿圆孔68的轴线转动；环形垫鉄63在其外圆周上设有定位孔631，支撑螺钉67支撑在环形垫鉄63的定位孔631内，锁紧螺母66锁紧支撑螺钉67，从而锁定供油提前角。
为了达到上述目的，本发明采用的另一个技术方案是：
如图1、图2、图3、图4、图5所示，本发明一种柴油机供油提前角的调整装置的调整方法，包括以下步骤：
1、调整前的准备；拆下柴油机缸头盖罩1、提前器盖32，拆开高压油泵2第一缸的高压油管管接头21，给高压油泵2输油、排气。
2、设定供油提前角；转动曲轴皮带轮4，观察柴油机在进、排气门处于闭合状态下，活塞压缩至上死点前，将曲轴皮带轮4上提前角刻度41指示的23°对准提前器指针311。
3、调整高压油泵2第一缸柱塞起始供油点；松开喷油泵正时齿轮6的支撑螺钉67和紧固螺钉62，利用曲轴正时齿轮7锁定喷油泵正时齿轮6，利用高压油泵主轴顶端的螺母24重复摆动高压油泵主轴22，在高压油泵供油口211处查看高压油泵主轴22顺时针方向转动时，第一缸柱塞出油的起始位置，位置确定后拧紧喷油泵正时齿轮6的紧固螺钉62。
4、检查供油提前角；在供油提前角周围，重复转动曲轴皮带轮4，在供油口211处查看曲轴皮带轮4顺时针方向转动，高压油泵2第一缸柱塞起始出油时，提前器指针311对应在曲轴皮带轮6的提前角刻度41，该对应刻度即为柴油机供油提前角；当该供油提前角不等于23°时，按步骤3重新调整；当该供油提前角等于23°时，将支撑螺钉67支撑在环形垫鉄63的定位孔631内，利用锁紧螺母66锁紧支撑螺钉67，从而锁定柴油机供油提前角。
5、复位；将柴油机缸头盖罩1、提前器盖32重新安装固定，将高压油泵第一缸的高压油管接头21重新安装到供油口211上，供油提前角设置完毕。
除上述实施例外，本发明还可以有其他实施方式。凡采用等同替换或等效变换形成的技术方案，均落在本发明要求的保护范围内。

Claims (7)

  1. 一种多缸柴油机供油提前角的调整装置，包括装配在多缸柴油机中的齿轮室、连接盘和安置在齿轮室外左端面上的高压油泵，所述高压油泵的主轴端头伸入齿轮室内与所述连接盘固定连接；其特征在于：所述连接盘的右端面上还固定连接有喷油泵正时齿轮，所述喷油泵正时齿轮的右端面上，距离中心沿圆周方向设有三个等分贯穿的圆弧腰形孔，在腰形孔上放置有环形垫鉄；采用紧固螺钉穿过环形垫鉄、腰形孔将喷油泵正时齿轮固定连接在连接盘的右端面上；所述喷油泵正时齿轮的右端面上设有的圆弧腰形孔中至少在一个腰形孔的逆时针方向的末端且距离腰形孔处还设有一贯穿的圆孔；所述圆孔安装有一只螺母轴线与喷油泵正时齿轮端面平行的T形螺母；所述T形螺母内设有一钉头顶支在环形垫鉄上的支撑螺钉。
  2. 根据权利要求1所述的多缸柴油机供油提前角的调整装置，其特征在于：所述连接盘为台阶形盘结构，所述喷油泵正时齿轮安置在连接盘的台阶上。
  3. 根据权利要求1所述的多缸柴油机供油提前角的调整装置，其特征在于：所述腰形孔的弧度不大于30°。
  4. 根据权利要求1所述的多缸柴油机供油提前角的调整装置，其特征在于：所述环形垫鉄的外圆周上还设有用于支撑螺钉支撑的定位盲孔。
  5. 根据权利要求1所述的多缸柴油机供油提前角的调整装置，其特征在于：所述支撑螺钉上还设有锁紧螺母。
  6. 根据权利要求1所述的多缸柴油机供油提前角的调整装置，其特征在于：所述喷油泵正时齿轮端面上设有的一贯穿圆孔的下端面上还设有沉 孔。
  7. 一种根据权利要求1所述的多缸柴油机供油提前角调整装置的调整方法，其特征在于包括以下步骤：
    (1)、调整前的准备：拆下柴油机缸头盖罩、提前器盖，拆开高压油泵第一缸的高压油管管接头，给高压油泵输油、排气；
    (2)、设定供油提前角：转动曲轴皮带轮，观察柴油机进、排气门处于闭合状态下，活塞压缩至上死点前，将曲轴皮带轮上对准提前角指针的提前角刻度停留在柴油机说明书规定的角度上；
    (3)、调整高压油泵第一缸柱塞起始供油点：松开喷油泵正时齿轮的支撑螺钉和紧固螺钉，利用曲轴正时齿轮锁定喷油泵正时齿轮，利用高压油泵主轴顶端的螺母重复摆动高压油泵主轴，在高压油泵供油口处查看高压油泵主轴顺时针方向转动时，第一缸柱塞出油的起始位置，位置确定后拧紧喷油泵正时齿轮的紧固螺钉；
    (4)、检查供油提前角：在供油提前角周围，重复转动曲轴皮带轮，在高压油泵供油口处查看曲轴皮带轮顺时针方向转动，高压油泵第一缸柱塞起始出油时，提前器指针对应在曲轴皮带轮上的提前角刻度，该对应刻度即为柴油机供油提前角；当该供油提前角与步骤(2)设置的角度不同时，按步骤(3)重新调整；当该供油提前角与步骤(2)设置的角度相同时，将支撑螺钉支撑在环形垫鉄的定位孔内，利用锁紧螺母锁紧支撑螺钉，从而锁定柴油机供油提前角；
    (5)、复位：将柴油机缸头盖罩、提前器盖重新安装固定，将高压油泵第一缸的高压油管接头重新安装到供油口上，供油提前角设置完毕。
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