Second-line four-cylinder diesel engine reciprocat -

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Second-line four-cylinder diesel engine reciprocating inertia force balance research and development institutions

2 whole vibration of the axial second-order axial EQB140-11 diesel engine order vibration peak acceleration test results shown in Figure 2. It can be seen in the engine rated speed, program A to the axial second-order vibration amplitude increased by 64%; in 16OOdmin increased by 69% when; but when the 1200dmin reduced 41%. Cause this phenomenon is: 6qz balance balancing mechanism can not be completely balanced block 4 cylinder reciprocating inertia force generated by second-order, and the counterweight are balanced with the second reciprocating inertia force is not the same line, resulting in an additional axial bending moment,[link widoczny dla zalogowanych], axial second-order vibration of the engine speed in the section of increased speed in 1300drain the following paragraphs,[link widoczny dla zalogowanych], the second order were balanced reciprocating inertia force is still to reduce the vibration of the axial second-order benefits. This special 120014001600180020002200240O2600 launched Jl / r. rain-l Figure 2EQBI40-11 diesel engine axial second-order vibrations. Ⅲ \ satin with. F 【Ying mouth design - research on reducing low-frequency vibration of the engine itself is very useful. Transverse Vibration of the whole 2.3 second EQB140-11 diesel engine order vibration peak lateral acceleration of the test results shown in Figure 3. It can be seen in the engine rated speed,[link widoczny dla zalogowanych], program A can reduce the vibration amplitude of about 45%; 1400r/rain in the following section of the engine speed, program A can be reduced by 25% or more of the vibration amplitude. Comparison of lateral vibration curve indicated that second order, 6-axis balancer balance weight helps reduce the engine speed range of vibration amplitude. This reduces low frequency vibration of the engine itself is also no doubt. Engine speed n / r · min Figure 3EQB140 - 11 2.4 Diesel transverse vibration of machine noise on second EQB140-11 diesel engine noise machine test results shown in Figure 4. This shows that the balance mechanism in the 1700dmin the following noise reduction effect is not obvious, more noise reduction effect is obvious in the 1700dmin,[link widoczny dla zalogowanych], program B at the rated condition to make the engine noise 1.5dB (A1100012001400160018002000220024002600 engine speed n / r · min Figure 4EQB140-11 diesel engine sound pressure level meter (front) 3 test results and analysis of vehicle matching EQB140-11 truck engine matched to EQ1074TSAD vibration and noise reduction were carried out validation tests, the experimental data shown in Table 2. Thus,[link widoczny dla zalogowanych], balanced biaxial institutions and silicone oil on the shock absorber in the vehicle vibration and noise reduction effect is more obvious. As the vehicle plus 8 vibration on the vehicle speed is in the pan 10 ~ 1000Hz range of the sum of: the engine is measured Second acceleration. So the test results on the vehicle and engine test results on the differences. Table 2EQ1074T5AD reduction in truck down throat test results are summarized car plus axial plus lateral plus vertical speed noise test items, dB speed / m · speed / m · s acceleration, m · a 260o260o260o260o engine condition r/min1Ooo no balance mechanism 85.6577295 83.8484858 program C + silicon oil shock absorber damping noise 1.8dB noise and vibration reduction of 16% by volume Vibration Damping 33% 39% (A) 4 Conclusion (1) axis balancing mechanism can effectively reduce the four-stroke inline four-cylinder diesel engine in the second reciprocating inertial force of the vibration amplitude. l1 diesel engine in the EQB140 a block of 8 balance balance between institutions in the 1000-260Odmin machine can be reduced 36% vertical vibration of a 58%. (2) EQB140-11 diesel engine block 8 balance balance than the 6 block damping effect. (3) EQB140 \; I1 diesel engine vibration in the axial second-order high-speed segment is too large, the methodology described in the balance of body axis to be further improved design. (4) axis balancer reduces the four-stroke inline four-cylinder diesel engine noise. In EQB140 a l1 diesel engine and its matching EQ1074 vehicle machine noise reduced 1.5dB.

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