振動壓路機外文翻譯

1、<p>　　二 ○ 一 三 屆畢業(yè)設(shè)計</p><p><b>　　外 文 翻 譯</b></p><p>　　學 院： 工程機械學院 </p><p>　　專 業(yè)： 機械設(shè)計制造及其自動化 </p><p>　　姓 名： 牛鵬 <

2、/p><p>　　學 號： 2504090819 </p><p>　　指導教師： 陳蝶 </p><p>　　完成時間： 年 月 日 </p><p>　　Introduction to YZ12 Vibration roller</p>

3、<p>　　Literature</p><p>　　The first sectionMajor technique characteristic </p><p>　　Z Vibration, and turned to the three major systems for hydraulic transmission, hydraulic pumps and thr

4、ee systems into one, directly by the engine crankshaft output through elastic coupling-driven pump, and then by the various control components control the system of the motor or cylinder, so that all systems running. <

5、;/p><p>　　Z Has four walking speed, realize stepless speed in every document, a document for 0~6.5km/h, second gear for 0~8.6km/h, third gear for 0~10.2km/h, four 0~12.5km/h, can guarantee the speed of the roll

6、ers in a variety of conditions to make the best compaction jobs, and can travel at faster speeds. Vibration bearing life and z in order to improve reliability, this machine uses a unique design: high-precision, forced lu

7、brication of vibrating wheel. </p><p>　　Z Vibration system with dual-frequency, dual-site functionality, can be effective compaction of different types and thickness of paving material. </p><p>

8、　　Z This vibration reduction of a four-level structure, making the vibration mode in real time, adverse effects on the crew reduced to a minimum. Coupled with the comfortable and bright cabs equipped with air conditionin

9、g, creating an ideal working environment for drivers. </p><p>　　Z Has a maintenance-free Central hinged device that does not require lubrication. </p><p>　　Z This machine is used in diesel engi

10、nes, hydraulic pumps, motors and axle components are internationally famous excellent products, so as to ensure that the roller technology advancement and reliability. </p><p>　　Z This machine belongs to sup

11、er heavy in China's standard of vibratory road roller, for high-grade Highway, railway, airport, dam, terminals, a high standard of subgrade engineering compaction operations. Compaction of z has a unique ability, ma

12、x power 56800kg, good compaction effect.</p><p>　　Z The overall opening of panels, all readily available and maintenance points.</p><p>　　Z Centralized, external hydraulic pressure points, maki

13、ng hydraulic systems testing, maintenance more convenient. </p><p>　　Z Complete safety protection device, so that operators are fully guaranteed. </p><p>　　The second section The overall stru

14、cture</p><p>　　YZ12 type vibration on the roller make use of the wheel of the vibration on the road is compacted, and it has sufficient ability to carry, and reduces through water.YZ12-vibration road roller

15、hydraulic control, two-wheeled, single steel wheel, self-propelled structure. </p><p>　　This machine vibration wheel parts and vehicle parts including two units, articulated through the Center articulated fr

16、ame between them together. This machine adopts articulated steering, to improve its performance and mobility. Part including drum vibratory wheel Assembly, front frame Assembly (including scraper) and other parts. Vibrat

17、ion round of the eccentric shaft via elastic coupling and vibration of motor shaft is connected to, supplied by a hydraulic pump vibration in pump high pressure </p><p>　　To reduce and even eliminate the adv

18、erse effects of vibration on driving car and driver, in the first frame after frame and vibration between wheel and cab and are equipped with a vibration reduction between buffer damping blocks. </p><p>　　Dr

19、iving car parts are rollers and pressure oil supply three system power source. Engine, drive and vibration and steering system, control device, the control room, electrical system, security protection devices are instal

20、led in the car. </p><p>　　The third section Hydraulic system</p><p>　　Road roller hydraulic system in hydraulic system contains three main subsystems, the vibration of hydraulic system, hydraul

21、ic system and steering hydraulic system. Three pumps, vibration, steering the triple combination pumping. Walking pump with a gear pump in back tax and penalties as a hydraulic system pump, at the same time, also provide

22、 pressure to the brake cylinder oil. II. driving hydraulic system with a dual-motor pumps consisting of parallel closed-circuit. </p><p>　　System operating pressures up to 40MPa. Driving pump for the variabl

23、e displacement piston pump, piston driving motor for variable before, it constitutes the best combination and planetary reducer. </p><p>　　Drive motor is also variable piston after, enter the end connected t

24、o the gearbox and rear axle assemblies. Pump to control the angle of oblique to change high pressure oil flow and direction, so as to change the direction of travel of the machine and speed; variable piston by electromag

25、netic valve with two oblique angle, so that the machine has four speeds, to meet the needs of different operating conditions. III. vibration of hydraulic system of vibratory hydraulic system is made up of single </p&g

26、t;<p>　　By manipulating electromagnetic valve, you can make the vibration of pumps swashplate with opposite two variable oblique angle, so that different direction and flow of high pressure oil pump output, vibrat

27、ion motor with resulting different steering and speed to vibrations at different frequencies and amplitudes vibration. </p><p>　　Four steering steering hydraulic system using open-circuit hydraulic system, t

28、he system working pressure 16MPa. By steering pump, hydraulic steering gear, two steering cylinders and tubing and other components. Steering pump gear pump. Five hydraulic system of hydraulic control system and accessor

29、ies also include integrated control valve block, collection block, and tanks, filters, coolers, accessories. Hydraulic brake oil of systems at the same time for the braking system provides. </p><p>　　The fo

30、urth section Drive system system </p><p>　　Drive system system is composed of driving hydraulic system, rear axle Assembly. I. driving pump, driving motor driven pump and motor function in the hydraulic sys

31、tem has been introduced. </p><p>　　Triple, vibration, steering pump through elastic coupling connection on the fly-wheel of the engine.Hose connection for driving pumps and motors. Rear axle drive motor conn

32、ections on the rear axle Assembly gear reducer, input power drive rear axle drive shaft rotation after; vibration wheel-drive motor with planetary gear reducer constitute one connection in plum of vibratory wheel on plat

33、e Assembly, powered by the motor to the plum blossom plate Assembly, Phillips-driven plate Assembly vibratio</p><p>　　Specifications for 23.1 per cent, inflation pressure 1.1kgf/cm2.</p><p>　　Th

34、e fourth section Vibration wheel assembly</p><p>　　Vibrating wheel assembly of vibratory wheel assembly eccentric of vibratory wheel axis, amplitude modulation device, vibration, vibrating wheel vibration of

35、 driven motor, bearings, vibration motors, mobile support, housings, plum flower plate, left and right connection brackets and so on. </p><p>　　I. vibratory wheel of vibratory wheel diameter of 1600mm, width

36、 2170mm. Vibrating wheel plate rolling body butt into its round smooth, uniform wall thickness, can ensure the vibration compaction effect uniform, preferably in the pavement of compaction effect and can be used as stati

37、c compacted solid. Body cavity loaded vibratory wheel bearings, eccentric axis, amplitude modulation device, this sealed Chamber containing Mobil-629 Mobil gear oil.</p><p>　　II. eccentric shaft eccentric sh

38、aft vibration generators, machine vibration is generated by vibration motor drives eccentric shaft high speed rotation. One end of the eccentric shaft and the vibration motor connected, change the Rotary to can change th

39、e amplitude of the vibration motor. </p><p>　　III. amplitude modulation device amplitude modulation device mounted on the eccentric shaft, set role of amplitude. Location of the device by changing the amplit

40、ude modulation and amplitude modulation block, achieve the purpose of adjusting the amplitude. Amplitude modulation device is a sealed cylindrical welded structures. </p><p>　　IV. damping blocks in order to

41、mitigate the effects of vibration on the frame, the vibration between wheel and front frame with rubber vibration blocks. </p><p>　　V. vibration-wheel-drive motor and reducer vibration-wheel-drive motor, red

42、ucer and stand together in front on the frame, gear box output connection on the clubs Board, powered by the motor output shaft to the gear, and then to the plum blossom, plum blossom again to vibrating wheel, driving vi

43、bration wheel rotation. </p><p>　　VI. vibration support both ends of the eccentric shaft, walking through the vibration of the bearing on the bearing in the housing, vibration motors by supporting components

44、 supported on the right bearing seat. Vibration bearing Sweden SKF bearing or Germany FAG bearing. Walking support assemblies for maintenance-free structure. </p><p>　　The sixth section Steering system <

45、;/p><p>　　Steering system steering with articulated steering, mainly from the steering gear pump, hydraulic steering gear, two steering cylinders, pressure tubing and other components. Hydraulic steering syste

46、m installed on the rear frame, through the Steering cylinder telescopic control of vehicle steering. </p><p>　　The seventh section Braking system </p><p>　　Braking system in order to ensure the

47、 safety of roller working and traveling, YZ18C braking systems equipped with braking, parking brake and emergency brake three. </p><p>　　I. driving brake brake with hydraulic brake. Hydraulic brake controlle

48、d by moving the joystick to achieve. Joystick control of control valves back into position, motor driven pump supplying driving traffic to zero, the rollers stop. </p><p>　　II. parking brake and emergency br

49、ake when the roller is traveling or working, rear axle and front drive reducer valve control normally closed on multiple pieces of brake is on, without braking effect. When the roller is stopped, several pieces of brake

50、friction locking through a spring force, in a State of braking. Emergency braking is mainly hydraulic servo brake, supported by a mechanical brake. After the emergency brake buttons is pressed, driving pumps swashplate i

51、mmediately return to zero </p><p>　　Note: in State of emergency shall not be used for emergency braking, especially in the fast-running state.</p><p>　　The eight section Frame</p><p&

52、gt;　　Center of the frame after the frame including the former frame, articulated frame in three parts. Connecting them into a hinged support the upper structure of the machine as a whole. </p><p>　　I. in fro

53、nt of the frame by the scraper before box after box before the Assembly, Board, boards, two side panels and other components. Its main functions are supporting vibrating wheel assembly. For the first frame structure of a

54、 typical boxes, combination of high strength steel plate, with sufficient strength and rigidity to resist strong impact force and torque of roller working. Scraper to scrape adhesion under the soil on the drum. Scraper f

55、ront-end and vibrating wheel clearance of cylindric</p><p>　　II. after frame after frame fuel tank, protection against roll frame, hydraulic tanks, hydraulic tank supports, panels, frames and other component

56、s. Its main function is to support the engine and the cab, fixed rear axle. After the frame of the structure of a rectangular box, front and Center articulated frame in vertical shaft and attached to the front plate, fol

57、lowed by the Assembly of the fuel tank, the middle is grooved steel frame. In order to ensure strength, weak parts of strengthening ri</p><p>　　III. Centre pinned by articulated frame Center articulated fram

58、e, shaft end bezel, ball bearings and other components. Through it before and after the frame articulated into a whole, can swing around implementation steering and front frame. Through the extension of control to the fu

59、el tank to control the steering angle. Machine frame allow horizontal relative swing between before and after, not more than ± 15 ° swing angle, this roller can be stable on uneven pavement and compaction work.

60、 In or</p><p>　　The nine section Cab and control systems </p><p>　　Cab and cab full sealing damping control system structure, installing air-conditioning, comfortable operation reliable, styli

61、sh magnificent and mighty generous, Interior elegance and bright, and achieves the domestic advanced level. Driver indoor joysticks, steering wheels, driver seat, placement of monitor instrument in full compliance with t

62、he principles of ergonomics. Driver seat height can lift, can move back and forth, back angle can also be adjusted. To reduce and even eliminate influence</p><p>　　The tenth section Electrical systems</

63、p><p>　　Electrical systems including batteries, DC motor, three-phase AC generator, lighting and electrical instruments, monitoring and control instruments, safety components, sound and light alarm installation

64、s. Electrical components adopt imported famous international brands. System voltage is 24V, negative ground, lines introduce a single system. Instruments, instrument panels, lamps, and other configuration achieves the d

65、omestic advanced level. </p><p>　　The 11th section Festival safety protection</p><p>　　YZ12-vibration road roller has a comprehensive safety device z equipped with roll protection device (ROPS)

66、. </p><p>　　Z articulated fixed security bar: roller unloading ship or when long time reset fixed articulated frame. </p><p>　　Z-start locking device when long time reset fixed articulated frame

67、. </p><p>　　Z-start locking device: when the roller of the joystick is in stall or high and low frequency select switch is not in the 0 position could not start the engine. </p><p>　　Z is equipp

68、ed with emergency braking device. </p><p>　　Z cover pieces opened automatically protection device: Dang cover pieces in manually hydraulic pump role Xia up opened Shi, security protection device can prevent

69、cover pieces accident whereabouts, dang maintenance end to lowered cover pieces Qian, will manually hydraulic pump above of soft axis manipulation device pull, cover pieces can in pump role Xia by oil cylinder will of pu

70、ll Xia, cover pieces closed Hou will soft axis manipulation device promoting to. (Note: lowered panels must be pullin</p><p>　　The 12th section By the security procedures</p><p>　　Try not to wa

71、s still vibrating, implementation is not allowed in the hard ground vibration, on the machine.</p><p>　　Z rollers are not allowed to exceed its allowed on climbing the ramp. </p><p>　　Z on the m

72、uddy roads, although the ramp slope is less than allowed for climbing, but when there are no slip-proof measures, you may not use this machine. </p><p>　　Z solid enough, or when there is a pit in the ground,

73、 shall not use this machine. At the edge of the ditch or slope, also shall not use this machine. </p><p>　　Z travel and construction should be open before and after the lamp lighting at night. </p>&l

74、t;p>　　Z while working on a rainy day, in order to ensure visibility, use front and rear wiper.</p><p>　　Z to avoid inadvertently overturned while working at the edge of the slope, not swerved. Z in the ra

75、in, you should try to avoid vibration compaction jobs at the edge of the slope. Due to vibration will increase the risk of both taxi. </p><p>　　Z roller in open cover parts for maintenance, security note h

76、ead.</p><p>　　The 12th section Transport and handling safety requirements</p><p>　　Safety requirements for transport and handling under normal circumstances, roller not long distance at high sp

77、eed. Long distance (30 km) when moving site, need towing equipment shipment.</p><p>　　I. Transport whether it be road or railway transport, road roller selection must have the appropriate volume of transport

78、 vehicles and loading capacity. Transport, frames before and after fixed with hinged safety Rod should be connected together, and also to take the necessary measures to prevent the rollers sliding and rolling. </p>

79、<p>　　II. handling when loading and unloading roller, loading and unloading tools must have sufficient bearing capacity. When you use a cable car loading and unloading roller, using Center articulated frame fixtur

80、es must first be fixed when using large flat hook lift, to ensure that the rollers remain flat state after lifting.</p><p>　　From 《YZ12 Vibration roller instructions》in Zomlion</p><p>　　YZ12振動壓

81、路機的介紹</p><p><b>　　文獻</b></p><p><b>　　主要技術(shù)特點</b></p><p>　　Z 行駛、振動和轉(zhuǎn)向三大系統(tǒng)均為液壓傳動，且三個系統(tǒng)的液壓泵連成一體，由發(fā)動 機曲軸輸出端通過彈性聯(lián)軸器直接驅(qū)動各泵，然后由各控制元件控制各系統(tǒng)的馬達 或油缸，使各系統(tǒng)運轉(zhuǎn)。</p>&

82、lt;p>　　Z 有四個檔，各檔都是無級調(diào)速，一檔0~6.5km/h，二檔0~8.6km/h，三檔0~10.2km/h，四檔0~12.5km/h，這樣能保證壓路機在保證壓實作業(yè)的同時以較佳最快的速度行駛。</p><p>　　Z 本機采用了獨特的設(shè)計思想：高精度強制潤滑的振動輪以提高振動軸承的壽命和可靠性。</p><p>　　Z 具有雙頻雙幅的振動系統(tǒng)可有效的壓實不同種類及厚度的鋪

83、料層。</p><p>　　Z 本機采用四級減振結(jié)構(gòu)，使得在振動壓實時對成員的不利影響減小到最低。再加上裝有空調(diào)的舒適明亮的駕駛室，為駕駛員提供了理想的工作環(huán)境。</p><p>　　Z本機采用的柴油機、液壓泵、馬達和后橋等元件，均為國際知名的優(yōu)秀產(chǎn)品，從而 確保壓路機的技術(shù)先進性和工作可靠性。</p><p>　　Z本機屬于我國振動壓路機標準中的超重型壓路機，適用

84、于高等級公路、鐵路路基、機場、大壩、碼頭等高標準工程壓實作業(yè)。</p><p>　　Z具有與眾不同的壓實能力，最大壓實力達 56800kg，壓實效果好。</p><p>　　Z 整體的覆蓋件使維修更為方便</p><p>　　Z 集中外置的液壓測壓點使得液壓系統(tǒng)的檢測維護更為方便。</p><p>　　Z 完善的安全保護裝置使操作者的安全得到

85、充分的保障。</p><p><b>　　第二節(jié) 總體結(jié)構(gòu)</b></p><p>　　YZ12型壓路機充分利用其振動輪的振動將路面壓實，使其具有足夠的承載能力，并且減少滲水。YZ12振動壓路機采用液壓控制的雙輪驅(qū)動，單鋼輪自行式結(jié)構(gòu)。</p><p>　　本機包括振動輪和機身兩部分，通過中心絞架將兩部分鉸接在一起。本機采用鉸接式轉(zhuǎn)向以提高其機

86、動性能。振動論部分包括振動輪總成，前車架總成（包括刮泥板）等部件。振動輪內(nèi)的偏心軸通過彈性聯(lián)軸器與振動馬達相連，由液壓泵組中的振動泵給振動馬達供應(yīng)高壓油帶動偏心軸旋轉(zhuǎn)產(chǎn)生強大的激振力。振動頻率和振幅可以通過液壓系統(tǒng)的控制進行調(diào)整以滿足不同工況的要求。</p><p>　　此外振動輪還具有行走的功能。由液壓泵組中的行駛泵輸出的高壓油驅(qū)動振動輪左邊的液壓馬達旋轉(zhuǎn)，從而驅(qū)動振動輪行駛。</p><p

87、>　　為減輕乃至消除振動對驅(qū)車部分及駕駛員的不利影響，在前車架與振動輪之間以及駕駛室與后車架之間都裝有起減震作用的減振塊。</p><p>　　驅(qū)動車部分是壓路機行駛和三大系統(tǒng)壓力油提供的動力源。啟動，行走，振動和轉(zhuǎn)向系統(tǒng)，控制裝置，控制室，電力系統(tǒng)，安全預防裝置都位于驅(qū)動車部分。</p><p><b>　　第三節(jié) 液壓系統(tǒng)</b></p>&l

88、t;p>　　一 壓路機液壓系統(tǒng)包括三個重要的子系統(tǒng)，振動液壓系統(tǒng)，液壓系統(tǒng)和轉(zhuǎn)向液壓系統(tǒng)。驅(qū)動泵，振動泵和轉(zhuǎn)向液壓泵組成三聯(lián)組合泵。 驅(qū)動泵包含一組安裝在后負重體中的齒輪泵作為液壓泵，同時，也為制動油缸提供液壓油。</p><p>　　二 行駛液壓系統(tǒng)采用雙馬達泵組成的并聯(lián)閉式回路。系統(tǒng)工作壓力可達40MPa。行駛泵為變量柱塞泵，前行駛馬達為變量柱塞馬達，它與行星減速器構(gòu)成最佳組合。后行駛馬達也是變量柱塞馬

89、達，與后橋總成輸入端的減速器相連。</p><p>　　行駛泵通過控制斜盤的角度來改變高壓油的流量和方向，從而改變機器的行駛方向和速度；變量柱塞馬達通過電磁閥控制使其具有兩種斜盤角度，從而使機器具有四檔速度，以適應(yīng)不同工況的要求。</p><p>　　三 振動液壓系統(tǒng) 振動液壓系統(tǒng)是由單馬達閉式液壓回路組成，系統(tǒng)的最大工作壓力為38MPa。振動泵為易變的斜盤式柱塞泵，振動馬達為不變的斜軸式

90、柱塞。</p><p>　　你可以朝著兩個不同的方向改變振動泵沖壓盤的傾斜角通過操控電磁閥，因此高壓油泵可以向不同的方向提供不同流量的高壓油，振動馬達也可以獲得不同的轉(zhuǎn)向和速度，同時以不同的頻率和幅度振動。</p><p>　　四 轉(zhuǎn)向液壓系統(tǒng) 利用開環(huán)液壓系統(tǒng)，系統(tǒng)的工作壓力為16MPa。由轉(zhuǎn)向泵，液壓轉(zhuǎn)向齒輪，兩個轉(zhuǎn)向油缸和油管及其他部件組成，轉(zhuǎn)向泵為齒輪泵。</p>&

91、lt;p>　　五 液壓控制系統(tǒng)及附件 液壓系統(tǒng)還高闊控制閥塊、集流塊以及郵箱、過濾器、冷卻器等附件。同時液壓系統(tǒng)還為制動系統(tǒng)提供松剎油。</p><p><b>　　第四節(jié) 行駛系統(tǒng) </b></p><p>　　行駛系統(tǒng)是由行駛液壓系統(tǒng)，齒輪軸組成的。</p><p>　　一 驅(qū)動泵，驅(qū)動馬達 驅(qū)動泵以及馬達的功用在液壓系統(tǒng)中已經(jīng)介紹。

92、行駛、振動、轉(zhuǎn)向三聯(lián)泵通過彈性聯(lián)軸器連接在發(fā)動機的飛輪上。驅(qū)動泵和驅(qū)動馬達由軟管連接。后橋驅(qū)動馬達連接在后橋齒輪總成的齒輪減速器上，輸出能量驅(qū)動后橋驅(qū)動軸旋轉(zhuǎn)；振動輪馬達與行星齒輪減速器構(gòu)成一體連接在振動輪梅花板總成上，動力通過馬達傳遞給梅花板總成，梅花板總成帶動驅(qū)動輪旋轉(zhuǎn)。為了減少甚至消除驅(qū)動車和駕駛員因振動帶來的不利影響，在梅花板與振動輪之間安裝有高品質(zhì)的進口減振塊。</p><p>　　二 后橋總成 后橋總

93、成由減速器，濕盤多片式剎車片，中央行星減速器傳動，驅(qū)動橋，車輪，以及其他部件組成。</p><p>　　三 輪胎總成 輪胎采用低壓寬斷面工程機械輪胎。規(guī)格為23.1-26，充氣壓力1.1kgf/cmcm。</p><p><b>　　第五節(jié) 振動論總成</b></p><p>　　振動輪總成由振動輪體，偏心軸，調(diào)幅裝置，減振塊，振動輪驅(qū)動馬達，

94、振動軸承，振動馬達，行走支撐，軸承座，梅花板，左右連接支架等組成。</p><p>　　一 振動輪體 振動輪直徑為1600mm，輪寬2170mm。振動輪滾動壓實面的光滑，一致的輪壁厚，可以保證壓實效果的均衡，在人行道的壓實以及固體的靜壓實中有較好的效果。振動軸承，偏心軸，調(diào)幅裝置，629號齒輪油都安裝在振動輪體的密封空腔中。</p><p>　　二 偏心軸 偏心軸振動發(fā)生器，機械振動是由振

95、動馬達驅(qū)動偏心軸以高速旋轉(zhuǎn)產(chǎn)生的。偏心軸與振動馬達連接產(chǎn)生的一種結(jié)果就是旋轉(zhuǎn)會改變振動馬達的振幅。</p><p>　　三 調(diào)幅裝置 調(diào)幅裝置安裝在偏心軸上，充當著調(diào)幅的角色。通過改變調(diào)幅塊和調(diào)幅裝置整體的位置來實現(xiàn)調(diào)幅的目的。調(diào)幅裝置是圓柱形焊接結(jié)構(gòu)。</p><p>　　四 減振塊 為了減輕振動對機架的影響，在振動輪和前車架之間安裝有橡膠減振塊。</p><p>

96、;　　五 振動輪驅(qū)動馬達和減速器 振動輪驅(qū)動馬達，減速器和車架一起固定于前車架上，減速器的輸出盤連接在梅花板上，動力由馬達輸出傳到減速器，再傳到梅花板，梅花板再傳到振動輪，驅(qū)動振動輪旋轉(zhuǎn)。</p><p>　　六 偏心軸兩端由振動軸承支撐在軸承座上，振動馬達通過行使支撐組支撐在又軸承座上。振動軸承采用瑞典skf軸承或者德國fag軸承。行走支撐組件為免維護結(jié)構(gòu)。</p><p><b&

97、gt;　　第六節(jié) 轉(zhuǎn)向系統(tǒng)</b></p><p>　　轉(zhuǎn)向系統(tǒng)轉(zhuǎn)向采用鉸接轉(zhuǎn)向，主要由轉(zhuǎn)向齒輪泵、液壓轉(zhuǎn)向齒輪、兩個轉(zhuǎn)向油缸，油壓管等部件組成。液壓轉(zhuǎn)向系統(tǒng)安裝在后車架上，通過轉(zhuǎn)向油缸控制車輛轉(zhuǎn)向。</p><p><b>　　第七節(jié) 剎車系統(tǒng)</b></p><p>　　剎車系統(tǒng)以確保壓路機在工作和行走時的安全，YZ18C型壓路

98、機裝配有行車制動，停車制動和緊急制動三種。</p><p>　　一 行車制動 行車制動依靠液壓制動。通過扳動操縱桿實現(xiàn)液壓制動。操縱桿控制的控制閥門歸位，馬達驅(qū)動泵提供動能為零，壓路機停止前進。</p><p>　　二 停車制動和緊急制動 當壓路機在行駛或者工作時，后橋和前驅(qū)動減速器閥門與常閉式制動片都開啟，不起制動作用。當壓路機停止時，制動片依靠制動彈簧鎖緊，處于制動狀態(tài)。當緊急制動按鈕

99、按下后，驅(qū)動泵斜盤直接歸零并且液壓制動；與此同時，齒輪箱和后橋制動也立刻起到前期制動效果。</p><p>　　后記：當情況緊急不得不采用緊急制動的時候，尤其是在高速行駛的時候。</p><p><b>　　第八節(jié) 車架</b></p><p>　　車架是由中心車架，鉸接車架和前車架三部分組成的。這三部分組合成一個整體共同支撐著機器的上部結(jié)構(gòu)。

100、</p><p>　　一 前車架由刮泥板總成、前框板、后框板、兩塊側(cè)板等組成。它的主要功用是支撐振動 輪總成。前車架為典型的方框結(jié)構(gòu)，采用高強度鋼板組合而成，具有足夠的強度和剛度抵 抗壓路機工作時的強沖擊力和扭矩。刮泥板用以刮下粘在振動輪上的泥土。刮泥板前端與 振動輪外圓表面的間隙可以調(diào)節(jié)。</p><p><b>　　二 后車架</b></p><

101、;p>　　后車架由燃油箱、防滾翻保護架、液壓油箱、液壓油箱支架、覆蓋件、框架等組成。后車架最主要的作用是支撐發(fā)動機和駕駛室，固定后車橋。后車架為一長方形狀，前面是和中心鉸接架連接的立軸和擋板，后面是燃油箱總成，中間是槽鋼架。為了保證其強度，薄弱部位采用加強肋加強，而且槽鋼用封板封成箱型梁結(jié)構(gòu)。螺栓和后橋總成剛性連接底部后橋支板。為了減小振動產(chǎn)生的影響，發(fā)動機和后車架之間設(shè)有彈性減震塊，同時又可方便將發(fā)動機調(diào)整到水平位置。</