Determination of optimal position for both support bearing and unbalance mass of balance shaft

Kim, Chan-Jung; Kang, Yeon June; Lee, Bong-Hyun; Ahn, Hyeong-Joon

doi:10.1016/j.mechmachtheory.2011.11.006

Cited by 20 publications

(15 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1 (Kim et al, 2012). To cancel out the second order vibration, it can be balanced by a pair of counter-rotating balance shafts at twice the angular velocity of the crankshaft.…”

Section: Inline 4-cylinder Enginementioning

confidence: 99%

“…The response of rotor dynamics, shown as reaction forces on bearing or bending deformation, will be dependent on the condition of shape of balance shaft or the location of unbalance mass, even though the unbalances are fixed as certain value (Stone and Ball, 2004;Ishikawa et al, 2002;Suh et al, 2000;Meek and Roberts, 1998;Huegen et al, 1997). Recently, Kim et al (2012) proposed the optimal location of both a supporting bearing and a deflection of balance shaft by introducing the objective function to minimize interesting energy terms, both the elastic strain energy and the kinematic energy of a balance shaft (Kim et al, 2012). However, the optimal process was limited for the inline 4-cylinde engine only to cope with reciprocal force from a secondary inertia part.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Location of unbalance mass and supporting bearing for different type of balance shaft module

Kim

2018

Mech. Sci.

Self Cite

View full text Add to dashboard Cite

Abstract. The dynamic characteristics of balance shaft module is controlled by the design of rotating parts as how to allocate both a unbalance mass and a supporting bearing so that the concept design of a rotor structure is the key issue on determining the overall quality of dynamic performance as well as fatigue resistance. Even the design on balance shaft has some limitation from the lay-out of a vehicle engine system, there is still chance to enhance the reliability of the balance shaft module by the promising design model of the rotor structure including support bearing locations. In this paper, an optimal location of unbalance mass and supporting bearing is proposed to make an efficient conceptual design using an objective function to minimize a bending deformation of rotor as well as a reaction force at supporting bearing. In addition, the application of design optimization of a balance shaft model is explained using an in-house program for inline 3-cylinder and inline 4-cylinder engine, respectively.

show abstract

“…1 (Kim et al, 2012). To cancel out the second order vibration, it can be balanced by a pair of counter-rotating balance shafts at twice the angular velocity of the crankshaft.…”

Section: Inline 4-cylinder Enginementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Location of unbalance mass and supporting bearing for different type of balance shaft module

Kim

2018

Mech. Sci.

Self Cite

View full text Add to dashboard Cite

show abstract

“…The coefficient c required in Equation (5) was set at −1/7 based on a consideration of the suggested slope range of −1/3.5 to −1/10 in ISO 16750-3. Because the notched simple specimen was constructed of S45C (mild steel), were selected for the fatigue-related material properties used in Equation (7). The fatigue damage found in the vibration test of the notched simple specimen is summarized in Table 2.…”

Section: Fatigue Damage Of a Notched Simple Specimenmentioning

confidence: 99%

“…In this instance, the spectral pattern is typical of a random noise distribution [2][3][4]. Alternatively, the powertrain of a vehicle system, which is comprised of a combustion engine and transmission, will produce harmonic excitation due to the rotating speed of the engine system [5][6][7]. Thus, vehicle components near the powertrain may be exposed to a harmonic excitation condition, whereas vehicle components isolated from the harmonic excitation of the combustion engine are primarily exposed to the road load that shows non-stationary random patterns.…”

Section: Introductionmentioning

confidence: 99%

Accelerated Sine-on-Random Vibration Test Method of Ground Vehicle Components over Conventional Single Mode Excitation

Kim

2017

Applied Sciences

Self Cite

View full text Add to dashboard Cite

Automotive manufacturers typically assess the mechanical durability performance of ground vehicle components for vibration excitation using either random or harmonic spectral loading patterns, such as the loading patterns suggested in international standards (e.g., ISO-16750-3). Selection of the correct excitation profile is dependent on the service condition of the component of interest. However, in the instance where the vehicle component is exposed to both harmonic excitations and background noise, the severity of impact of the in-service environment cannot be satisfied via a single random or harmonic test alone. In this case, the optimal test strategy is to evaluate the vehicle component under a sine-on-random excitation. Within this study, a uniaxial excitation test was conducted for a notched simple specimen under three spectral loading cases (harmonic, random, and sine-on-random), and the test severity was determined based on two kinds of fatigue damage: the physical damage from measured strain and the calculated pseudo-damage from acceleration measurements, as indicated in ISO-16750-3. Based on this comparison of accumulated fatigue damage, the efficiency of the proposed sine-on random vibration was proved against conventional single spectral pattern test methods.

show abstract

“…In 2011, Liu and Huston presented a set of formulae for determining the ring weights needed for balancing crankshafts of six-cylinder V60 degree engines [10]. In 2012, an optimal conceptual design of a balance shaft was presented by Kim et al through determining locations of both unbalance and supporting bearing [11]. In 2012, Karabulut devised a three-degree-of-freedom dynamic model for a twocylinder four-stroke engine, which enabled the simultaneous treatment of the piston-crankshaft mechanism and engine block.…”

Section: Introductionmentioning

confidence: 99%

Research on the Field Dynamic Balance Technologies for Large Diesel Engine Crankshaft System

Zhang¹,

Zhang²

2017

Shock and Vibration

View full text Add to dashboard Cite

In order to reduce the unbalancing mass and the accompanying unbalancing vibration of diesel engine crankshaft system, the field dynamic balancing method and its key technologies are presented in the paper. In order to separate the unbalancing vibration signal from the total vibration signal of crankshaft system, the fundamental frequency signal fitting principle based on the least square method was introduced firstly, and then wavelet noise reduction method was applied to improve the signal fitting precision of least square method. Based on the unbalancing vibration signal analysis and assessment of crankshaft system, the influence coefficient method was applied to calculate the value and phase of the equivalent unbalancing mass in flywheel. To easily correct the unbalancing condition of crankshaft system, the unbalancing adjustment equipment was designed based on the flywheel structure. The balancing effect of field dynamic balancing system designed for the large diesel engine has been verified by field experiments.

show abstract

Determination of optimal position for both support bearing and unbalance mass of balance shaft

Cited by 20 publications

References 12 publications

Location of unbalance mass and supporting bearing for different type of balance shaft module

Location of unbalance mass and supporting bearing for different type of balance shaft module

Accelerated Sine-on-Random Vibration Test Method of Ground Vehicle Components over Conventional Single Mode Excitation

Research on the Field Dynamic Balance Technologies for Large Diesel Engine Crankshaft System

Contact Info

Product

Resources

About