WO2015126185A1 - 디젤 엔진의 기어 트레인 - Google Patents
디젤 엔진의 기어 트레인 Download PDFInfo
- Publication number
- WO2015126185A1 WO2015126185A1 PCT/KR2015/001670 KR2015001670W WO2015126185A1 WO 2015126185 A1 WO2015126185 A1 WO 2015126185A1 KR 2015001670 W KR2015001670 W KR 2015001670W WO 2015126185 A1 WO2015126185 A1 WO 2015126185A1
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- WIPO (PCT)
- Prior art keywords
- gear
- teeth
- output
- input
- train
- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B67/00—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for
- F02B67/04—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus
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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
- F16H—GEARING
- F16H1/00—Toothed gearings for conveying rotary motion
- F16H1/02—Toothed gearings for conveying rotary motion without gears having orbital motion
- F16H1/20—Toothed gearings for conveying rotary motion without gears having orbital motion involving more than two intermeshing members
- F16H1/22—Toothed gearings for conveying rotary motion without gears having orbital motion involving more than two intermeshing members with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts
Definitions
- the present invention relates to a gear train of a diesel engine, and more particularly, to a gear train for transmitting power from a crankshaft of a diesel engine.
- the gear train includes gears that mesh with each other and may be configured to transfer a portion of power from a drive source, such as an engine, to another device.
- a drive source such as an engine
- gears that mesh with each other generate noise and further have a peripheral component of the gear train to amplify vibration and noise.
- One object of the present invention is to provide a gear train that can reduce noise in a diesel engine.
- the gear train according to the exemplary embodiments of the present invention is provided at one end of the input shaft, Zi gear teeth are provided at one end of the output shaft, the output shaft is Zo An output gear having a gear tooth number, and an idle gear transferring power between the input gear and the output gear at a predetermined speed ratio from the input shaft to the output shaft.
- the idle gear has a first gear meshing with the input gear and having Zdi gear teeth and a second gear meshing with the output gear and Zdo gear teeth.
- the gear teeth Z i of the input gear and the gear teeth Zo of the output gear include at least one first common factor a, and the gear teeth Z di of the first gear and the gears of the second gear.
- the number of teeth Zdo includes at least one second common factor b, and the first common factor a and the second common factor b are mutually different.
- the speed ratio may be a natural number.
- the speed ratio may be two.
- the gear teeth Zo of the gear may be 42, 68, 51, 63, respectively.
- the input shaft may be a crankshaft of a diesel engine
- the output shaft may be a cam shaft
- the gear train may be accommodated in a flywheel housing provided at one side of the engine.
- the interlocking gears of the gear train may have gear teeth that do not produce harmonic frequencies. Therefore, it is possible to reduce noise generated when the gear is engaged and to improve stability of the dynamic behavior of the gear.
- FIG. 1 is a perspective view illustrating an engine including a gear train according to exemplary embodiments.
- FIG. 2 is a front view illustrating the gear train of FIG. 1.
- FIG. 3 is a rear perspective view illustrating the gear train of FIG. 1.
- first and second may be used to describe various components, but the components should not be limited by the terms. The terms may be used for the purpose of distinguishing one component from another component.
- first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component.
- FIG. 1 is a perspective view illustrating an engine including a gear train according to exemplary embodiments.
- FIG. 2 is a front view illustrating the gear train of FIG. 1.
- 3 is a rear perspective view illustrating the gear train of FIG. 1.
- the gear train 100 may include an input gear 110, an idle gear 120, and an output gear 130 for transmitting power at a predetermined transmission ratio from an input shaft to an output shaft.
- the gear train 100 may further include shafts and bearings that rotate by the gears.
- the gear train 100 may be installed on one side of a drive source, such as a diesel engine, to be configured to transfer a portion of the power from the drive source to the valve mechanism.
- a drive source such as a diesel engine
- the gear train 100 may be configured to transfer a portion of power from the drive source to a fuel pump, air compressor, hydraulic pump, generator, and the like.
- the diesel engine includes a cylinder block (not shown) including a plurality of cylinders, for example, six cylinders, disposed above the cylinder block to form a combustion chamber together with the cylinder. And a cylinder head (not shown) in which various valve mechanisms and injection valves are installed, pistons 20 reciprocating in the cylinder, and a crankshaft 10 connected to the piston by a connecting rod. .
- the timing gear case 40 is arranged at the output side of the diesel engine, and the flywheel housing 50 is coupled on the timing gear case 40 so that the gear train 100 can be accommodated in the flywheel housing 50. Can be.
- the input gear 110 of the gear train 100 is coupled to one end of the crankshaft 10 of the diesel engine, and the second gear 130 of the gear train 100 is a camshaft for driving the valve mechanism. It may be coupled to one end of (30). Accordingly, the input shaft of the gear train 100 may be a crankshaft 10 of the diesel engine, and the output shaft of the gear train 100 may be a cam shaft 30 for driving the valve mechanism.
- the input gear 110 meshes with the first gear 122 of the idle gear 120, and the output gear 130 is the second gear 124 of the idle gear 120.
- the idle gear 120 may transfer power between the input gear 110 and the output gear 130 at a predetermined speed ratio from the input shaft to the output shaft.
- the input gear 110 may have Zi gear teeth
- the output gear 130 may have Zo gear teeth
- the first gear 122 of the idle gear 120 may have Z teeth
- the second gear 124 of the idle gear 120 may have Zdo gear teeth.
- the transmission ratio i may be defined by Equation 1 below.
- the gear ratio 100 of the gear train 100 may be defined by Equation (2) below.
- the rotation ratio of the crankshaft 10 and the camshaft 30 of the diesel engine may have a constant ratio.
- the cam shaft 30 per revolution of the crankshaft 10 may perform 0.5 revolutions. That is, the speed ratio i of the gear train 100 may be two. Accordingly, the input gear 110 of the gear train 100, the first and second gears 122 and 124 of the idle gear 120 and the gear teeth of the output gear 130 should be designed to satisfy the desired transmission ratio. .
- Table 1 is a table showing the gear teeth of the gear train according to the embodiment and the comparative example and their frequency comparisons.
- the gear teeth of the gears of the gear train 100 may be designed in consideration of the desired transmission ratio and noise reduction.
- the gear teeth Zi of the input gear 110 and the gear teeth Zo of the output gear 130 include at least one first common factor a, and include the first gear of the idle gear 120.
- the number of gear teeth Zdi of 122 and the number of gear teeth Zdo of the second gear 124 may include at least one second common factor b.
- the first common factor (a) and the second common factor (b) may be mutually different.
- the gear teeth Zi of the input gear 110, the gear teeth Zdi of the first gear 122, the gear teeth Zdo of the second gear 124, and the output gear 130 of Gear teeth Zo are 42, 68, 51 and 63, respectively.
- the first common divisor a of the gear teeth Zi of the input gear 110 and the gear teeth Zo of the output gear 130 is 7, and the gear teeth Zdi and the second gear of the first gear 122 are seven.
- the second common divisor (b) of the gear teeth Zdo of 124 is 17, and 7 which is the first common divisor a and 17 which is the second common divisor b are mutually different.
- the common prime factor between the gear teeth Zi of the input gear 110 and the gear teeth Zdi of the first gear 122 is 2, and the gear teeth Zdo of the second gear 124 and The common prime factor between the number of gear teeth Zo of the output gear 130 is three.
- the two gears engaged with each other are mesh frequency, harmony frequency, sideband frequency, and hunting tooth frequency according to the number of gear teeth according to the following equations (3) to (8).
- Frequencies such as
- f S1 is the input shaft frequency (Hz)
- N1 is the input shaft rotational speed (rpm)
- Z1 is the number of drive gear teeth
- f S2 is the output shaft frequency (Hz)
- N2 is the output shaft rotation speed (rpm)
- Z2 is the number of driven gear teeth.
- n is a natural number.
- the harmonic frequency f h can cause noise in the human listening region.
- the hunting tooth frequency (f HT ) is a phenomenon that occurs at a specific frequency whenever defective teeth contact each other. Gear pairs with low f HT are less worn and can be used longer than gear pairs with high f HT .
- the gear teeth of the interlocking input gear 110 and the first gear 122 may generate the following frequencies at 1900 rpm.
- gear teeth of the second gear 124 and the output gear 120 meshing with each other may generate the following frequencies at 1900 rpm.
- the hunting tooth frequencies f HT between the interlocking input gear 110 and the first gear 122 and the interlocking second gear 124 and the output gear 120 are significantly lower, respectively, 0.93 Hz. Value, the noise generated when the gear is engaged can be reduced and the stability of the dynamic behavior of the gear can be improved.
- the number of gear teeth of the meshing input gear 110 and the first gear 122 is 43 equal to each other, and generates harmonic frequencies having the same magnitude as each other when the gears occur.
- the hunting tooth frequencies f HT between the interlocking input gear 110 and the first gear 122 and between the interlocking second gear 124 and the output gear 120 are each significantly high at 36.67 Hz. Having a value, it can generate noise generated when the gear is engaged and generate a considerable transmission error.
- the number of gear teeth Zi of the input gear 110, the number of gear teeth Zdi of the first gear 122, the number of gear teeth Zdo of the second gear 124, and the output gear 130 are measured.
- Gear teeth Zo are 44, 44, 28 and 56, respectively.
- noise may occur in the low frequency band 850 to 1050 Hz and the high frequency band 6.3 to 8.5 kHz.
- the hunting tooth frequencies f HT between the interlocking input gear 110 and the first gear 122 and between the interlocking second gear 124 and the output gear 120 are each significantly high at 36.67 Hz. Having a value, it can generate noise generated when the gear is engaged and generate a considerable transmission error. Therefore, depending on the gear teeth of the gears to be engaged, a harmonic frequency of 28th and 44th order is generated, and this harmonic frequency has a peripheral component such as the flywheel housing 50 to amplify vibration and noise.
- the gear teeth Z i of the input gear 110 and the gear teeth Zo of the output gear 130 include at least one first common factor a and the idle gear 120.
- the number of gear teeth Zdi of the first gear 122 and the gear teeth Zdo of the second gear 124 may include at least one second common factor b.
- the first common factor (a) and the second common factor (b) may be mutually different.
- gears that mesh with each other may have gear teeth that produce a relatively low hunting tooth frequency without generating a harmonic frequency.
- the gear teeth Zi of the input gear 110 have a 7 which is the first common divisor a, and the gear teeth Zdi of the first gear 122 of the idle gear 120 engaged therewith.
- These first and second common factors a, b are mutually exclusive.
- the number of teeth of the gear Zdo of the second gear 124 of the idle gear 120 has 17, which is the second common factor b, and the number of teeth of the output gear 110 meshing with the first gear is a first common factor a. 7).
- These first and second common factors a, b, 7 and 17 are mutually exclusive.
- the interlocking gears of the gear train 100 may have gear teeth that produce a relatively low hunting tooth frequency without generating a harmonic frequency. Therefore, it is possible to reduce noise generated when the gear is engaged and to improve stability of the dynamic behavior of the gear.
- crankshaft 20 piston
- camshaft 40 timing gear case
- gear train 110 input gear
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Gear Transmission (AREA)
- Gears, Cams (AREA)
Abstract
Description
Claims (6)
- 입력축의 일단부에 구비되며, Zi개의 기어 잇수를 갖는 입력 기어;출력축의 일단부에 구비되며, Zo개의 기어 잇수를 갖는 출력 기어; 및상기 입력 기어 및 상기 출력 기어 사이에서 상기 입력축으로부터 상기 출력축으로 기 설정된 변속비로 동력을 전달하고, 상기 입력 기어와 맞물리며 Zdi개의 기어 잇수를 갖는 제1 기어 및 상기 출력 기어와 맞물리며 Zdo개의 기어 잇수를 갖는 제2 기어를 구비하는 아이들 기어를 포함하고,상기 입력 기어의 기어 잇수(Zi)와 상기 출력 기어의 기어 잇수(Zo)는 적어도 하나의 제1 공약수(a)를 포함하고, 상기 제1 기어의 기어 잇수(Zdi)와 상기 제2 기어의 기어 잇수(Zdo)는 적어도 하나의 제2 공약수(b)를 포함하고, 상기 제1 공약수(a)와 상기 제2 공약수(b)는 서로소인 것을 특징으로 하는 기어 트레인.
- 제 2 항에 있어서, 상기 변속비는 2인 것을 특징으로 하는 기어 트레인.
- 제 1 항에 있어서, 상기 입력 기어의 기어 잇수(Zi), 상기 아이들 기어의 상기 제1 기어의 기어 잇수(Zdi), 상기 아이들 기어의 상기 제2 기어의 기어 잇수(Zdo) 및 상기 출력 기어의 기어 잇수(Zo)는 각각 42, 68, 51, 63인 것을 특징으로 하는 기어 트레인.
- 제 1 항에 있어서, 상기 입력축은 디젤 엔진의 크랭크샤프트이고, 상기 출력축은 캠샤프트인 것을 특징으로 하는 기어 트레인.
- 제 5 항에 있어서, 상기 기어 트레인은 상기 엔진의 일측에 구비되는 플라이휠 하우징 내에 수용되는 것을 특징으로 하는 기어 트레인.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020167022939A KR101821391B1 (ko) | 2014-02-21 | 2015-02-17 | 디젤 엔진의 기어 트레인 |
| CN201590000302.7U CN205936841U (zh) | 2014-02-21 | 2015-02-17 | 柴油发动机的齿轮系 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020140020635A KR20150099106A (ko) | 2014-02-21 | 2014-02-21 | 디젤 엔진의 기어 트레인 |
| KR10-2014-0020635 | 2014-02-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2015126185A1 true WO2015126185A1 (ko) | 2015-08-27 |
Family
ID=53878600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2015/001670 Ceased WO2015126185A1 (ko) | 2014-02-21 | 2015-02-17 | 디젤 엔진의 기어 트레인 |
Country Status (3)
| Country | Link |
|---|---|
| KR (2) | KR20150099106A (ko) |
| CN (1) | CN205936841U (ko) |
| WO (1) | WO2015126185A1 (ko) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1191388A (ja) * | 1997-09-19 | 1999-04-06 | Nissan Motor Co Ltd | 4輪駆動車の駆動力伝達装置 |
| KR20040004343A (ko) * | 2003-12-23 | 2004-01-13 | 조문행 | 복합 유성 기어 세트 및 이를 갖는 기어 트레인 |
| KR20040073922A (ko) * | 2003-02-14 | 2004-08-21 | 가부시끼 가이샤 구보다 | 엔진 및 엔진의 제조방법 |
| US20120108377A1 (en) * | 2006-09-26 | 2012-05-03 | Epi-Energy, Ltd. | Power Transmission System with Continuously Variable Speed Control |
| CN102624196A (zh) * | 2012-03-30 | 2012-08-01 | 余虹锦 | 新型径向磁场的少极差电磁式偏心磁性齿轮副 |
-
2014
- 2014-02-21 KR KR1020140020635A patent/KR20150099106A/ko active Pending
-
2015
- 2015-02-17 CN CN201590000302.7U patent/CN205936841U/zh not_active Expired - Lifetime
- 2015-02-17 KR KR1020167022939A patent/KR101821391B1/ko active Active
- 2015-02-17 WO PCT/KR2015/001670 patent/WO2015126185A1/ko not_active Ceased
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1191388A (ja) * | 1997-09-19 | 1999-04-06 | Nissan Motor Co Ltd | 4輪駆動車の駆動力伝達装置 |
| KR20040073922A (ko) * | 2003-02-14 | 2004-08-21 | 가부시끼 가이샤 구보다 | 엔진 및 엔진의 제조방법 |
| KR20040004343A (ko) * | 2003-12-23 | 2004-01-13 | 조문행 | 복합 유성 기어 세트 및 이를 갖는 기어 트레인 |
| US20120108377A1 (en) * | 2006-09-26 | 2012-05-03 | Epi-Energy, Ltd. | Power Transmission System with Continuously Variable Speed Control |
| CN102624196A (zh) * | 2012-03-30 | 2012-08-01 | 余虹锦 | 新型径向磁场的少极差电磁式偏心磁性齿轮副 |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20150099106A (ko) | 2015-08-31 |
| KR20160111990A (ko) | 2016-09-27 |
| CN205936841U (zh) | 2017-02-08 |
| KR101821391B1 (ko) | 2018-01-23 |
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