【正文】 ve system. The primary function of the accessory belt driven system is power transmission from the crankshaft pulley to the accessory ponents. Accessory ponents include the alternator, powersteering pump, air conditioner, and the water pump. The automotive engineering literature is rich in descriptions of belt/chain drives [18]. The model developed herein differs in that it is fully implemented in mercial software, plete with a GUI, and captures fully coupled dynamics in a bined finite element / multi body dynamics approach. it is a alternating stress, can cause vibration and gear noise, so the wheel dynamic balance testing is necessary for the body part. Precision gear box bore the impact of noise Box Hole accuracy on the noise reducer has prominent effects. Aperture hole is precision accuracy, central moment of the error, the parallelism of the centerline of the hole and tilt. Production practice, we understand the bearing outer ring and the gear box with the clearance hole of the bearing noise, when the hole clearance and the bearing outer ring around the , the bearing of the machine can reduce the noise impact. Assembly accuracy on the noise Quality of the gear assembly has a direct impact noise control. Therefore, the assembly in the machine should be noted: ① normal gear at all levels to ensure the engagement side of the gap, meshing well, pay attention to as part (such as the sleeve) fixed, In the past decade the applicability of beltdrives has been extended significantly due to their increased reliability. With automotive engines it is now mon to join a large number of beltdrives into a single, long beltdrive with several tensioner pulleys. However, these beltdrives can exhibit plex dynamic behaviors, which can lead to undesirable noise and aim of this paper is to present an effective and realistic numerical model to predict the dynamic response of such beltdrives. Based on the simulated responses the beltdrive construction can then be optimized in order to increase efficiency, reduce noise and vibrations, beltdrive model is based on flexible multibody system dynamics, where the belt is modeled using beam elements. With the developed contact model between the belt and the pulley, we can accurately predict the contact forces and stickslip zones between the belt and pulley. The identification of the beltdrive39。 [5] 5 總結(jié) 車輛驅(qū)動橋單級主減速器噪音問題是比較復雜的系統(tǒng)問題，既涉及到各不同零部件的加工精度，又需要在裝配環(huán)節(jié)進行分別控制，實際的噪音產(chǎn)生原因可能發(fā)生在其中的某個環(huán)節(jié)，也可能是多個環(huán)節(jié)均存在 問題，為有效避免噪音的發(fā)生，需要在制造環(huán)節(jié)和裝配環(huán)節(jié)均進行控制與調(diào)整，尤其是后期的調(diào)整需要嚴格控制工藝方法，根據(jù)實際的試驗反饋情況來不斷修正各調(diào)整量，以最終獲得某產(chǎn)品的合理控制范圍。對于一個齒輪來說影響工作平穩(wěn)性的因素是他的基節(jié)誤差和它的漸開線齒形誤差。 經(jīng)過多年研究，提出了通過優(yōu)化齒輪參數(shù)，如 變位系數(shù) 、齒高系數(shù)、壓力角、中心距，使嚙入沖擊速度降至最小，嚙出沖擊速度與嚙入沖擊速度的比值處于某一數(shù)值范圍，減小或避免嚙合節(jié)圓沖擊的齒輪設計方法，也可明顯降低減速機齒輪噪聲。 調(diào)整小軸承內(nèi)圈與主動齒輪的配合 為方便安裝維修目前部分主減速器的小軸承內(nèi)圈與主動齒輪的配合性質(zhì)為小間隙配合這樣方便安裝和跟換主齒油封，但是在主減速器工作時如果采用小間隙配合，當起步的時候法蘭盤傳遞的扭矩突然傳遞給主動齒輪，但小軸承內(nèi)圈此時會發(fā)生相對措動，這種措動使擋油盤厚度磨損加劇容易導致小軸承軸向松動，從而產(chǎn)生噪音。 如果因為小軸承內(nèi)圈間隙配合產(chǎn)生主動齒輪旋轉(zhuǎn)時擋油 盤或隔套或大墊片發(fā)生旋轉(zhuǎn)時的錯動，則會引起因軸向力變小而導致的軸向沖擊，并且這種沖擊在高速旋轉(zhuǎn)條件下會發(fā)出較大噪音。 4 齒輪的加工對減速器的影響 減速器的主要噪聲源是嚙合齒輪，影響它的主要因素有：設計參數(shù)，制造精度與它的工作條件。 齒輪的接觸精度對噪聲的 影響 。 本文對減速 器 產(chǎn)生的噪音主要從制造精度和裝配精度兩方面進行分析。s material properties is based upon experimental data. Several original experiments are proposed in order to extract the damping and friction characteristics of multiribbed belts. Finally, the applicability of the beltdrive model is presented by simulating a serpentine beltdrive,considering nonsteady beltdrive operational conditions,which are mon in automotive engines. to avoid the gear end of the runout and so on. ② Install bearings to avoid undue percussion, in the bearing transport, the assembly process to avoid the collision. ③ gear drive ponents required for the cleaning, the assembly process to avoid the bump on the transmission ponents. [4] 5 Conclusion Singlestage vehicle main gear axle noise problem is more plex systems, both with regard to the precision of the different ponents, but also need to be controlled separately in the assembly areas, the actual cause of the noise which may occur in one part of May also exist in numerous aspects of the problem is, as effectively prevent the occurrence of noise, you need the assembly in the manufacturing sector and all aspects of control and adjustment, especially adjustment of the need for strict control of postprocess method, based on actual feedback to constantly test The amendments adjust the volume, to ultimately a product of reasonable control. In this paper, the noise generated from the gear manufacturing precision and assembly precision analysis of two aspects. With the continuous improvement of manufacturing technology, advanced assembly process of the development and implementation, and strict implementation of relev