2022年玉米脱粒机的译文英语 .pdf

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1、个人收集整理仅供参考学习1 / 12 Design and Experiment of 4YQZ-3A Combine Harvester for Corn Zhang Xirui Dong Youfu Zhang Daolin (School of Mechanics and Electrics Engineering Hainan University Danzhou, China )资料个人收集整理，勿做商业用途Abstract Due to the problem of the low retrieving rate of straw while harvesting, fodder

2、went sort in stock raising and to overcome the practical problem of corn harvester reaping both corn stalk and spike while in operation, 4YQZ-3A combine harvester was designed, analyzed and the parameters of key components were pointed out for better gripping delivery mechanism, vertical picking and

3、 chopping cutter, helicinae and throwing apparatus.During the corn harvesting season, numerous performance testing and the production assessment were carried out in the field. Results achieved from the experiment indicate that the whole machine has better performance and can accomplish reaping both

4、corn stalk and spike well.资料个人收集整理，勿做商业用途Keywords- corn harvester; picking and threshing harvester; design;Experiment资料个人收集整理，勿做商业用途1.introduction Corn is Chinas second-largest food crop, occupies an important position in food production1. Maize straw contains a lot of crude protein, crude fat and f

5、iber nutrient component, etc. Thus it is one of the most perfect forage of high quality in animal husbandry.The national annual production of corn straw is about 60,000 tons, which is a huge potential forage source 4.Corn harvester reaping both corn stalk and spike can complete the harvest of corn e

6、ar and stalks within one time, so it has significant economic, social and eco- system efficiency 5-6. At present, corn harvester reaping both corn stalk and spike still develops very slow, and the domestic model mainly are hanging type. Because of underpowered, low production efficiency and straw cl

7、eanness, it has not been rapidly promoted 7-8.Foreign models are mainly Ukrainian KCKY-6 Corn harvest machine and Corn Star series united harvest machine developed by Kempe Co. in German, due to untidy stubble height and higher price, this type of air-craft is not suitable for Chinas national condit

8、ions 9-11.资料个人收集整理，勿做商业用途Foundation item: Public beneficial(agriculture)Science research fund issue(9-04)资料个人收集整理，勿做商业用途On the basis of the tenth-five national research tackle key problems in science and technologyresearch, in this article 4YQZ-3A combine harvester was designed, which combines exist

9、ing corn harvest and corn silage mechanization technique and improves the design and optimizes the combination for each working device. During the of harvest cornear, the 4YQZ-3A combine harvester can also complete cutting, conveying, chopping collection and root crop broken tasks and so on; With th

10、e popularization and appli-cation of this technique , we can solve the problem of corn straw recovery and reduce the waste of straw resources and improve the environment and soil pollution caused by straw burning. Thereinto, the straw recovery can provide high quality feed for livestock and reduce t

11、he excessive dependence on pasture, so 精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 1 页，共 12 页个人收集整理仅供参考学习2 / 12 this technique has important practical significance to our countrys increasingly developing animal husbandry and related industries.资料个人收集整理，勿做商业用途2. Overall Institutions and Main Techn

12、icalIndicators资料个人收集整理，勿做商业用途2.1. Whole Structure and Work Principle As shown in figure 1, 4YQZ-3A combine harvester for corn is mainly made up of gripping delivery mechanism, spike picking device, stem shredding mechanism, cast cylinder, spike collecting box, stem crushing box, counters-field devic

13、e and helicinae and delivery apparatus of stalks, etc. This machine can once completed the picking, rising and transportation, setting into the box, stalks cutting, conveying, chopping, throwing and collection and root crop crushing of corn grain. While the machinesk is operating, nearsidedivider su

14、bdivided maize plants, reciprocating cutter cut the plants, clamping chain clamps maize plants of which root is sundered and then convey them to vertical spike-picking roller to pick off the ear, the corn ear are conveyed to the spike collecting box by the delivery mechanism; Stalks are chopped by v

15、ertical hob behind the stem pulling roller , and then are casted by casting device to stem crushing box; and corn root are broken by counters-field device.资料个人收集整理，勿做商业用途2.2. Technology Index of the Machine According to the requirements of the chopping and ensiling craft of the corn stalks and the f

16、unction characteristics of the prototype requirements, The main technical parameters are determined as is shown in Table 1.资料个人收集整理，勿做商业用途Table 1. The main technical parameters of 4YQZ-3A combine harvester资料个人收集整理，勿做商业用途Parameters Numerical valueParameters Numerical value Boundary dimension (lengthw

17、idth height)/mm 7100 2500 3600 Minimum ground clearance/mm 210Entire machine weight/kg 5090 Revolving speed of spike Picking roller/r?min-1 1080 Mating Power/kW 88.2 Revolving speed of Stalkschopping machine/r?min-1 2100 Number of Harvest rows/row 3 Forward speed ofthehavester/km?h -1 1.33.5 Adapted

18、 linespacing/mm 500800 Theoreticalproductivity/ hm2?h-1 0.638Figure 1.4YQZ - 3 of maize united harvest machine structureschematic drawing资料个人收集整理，勿做商业用途3. Main Working Parts Design 3.1 Gripping Delivery Mechanism As figure 2 shows, gripping delivery mechanism are mainly made of positivefeeding chain

19、, passive sprocket, tension device, clamping board, conveying chain and drive sprocket,etc. When the machine are working, milpa are devided and lifted up by nearsidedivider, and then drive sprocket are driven by passive sprocket 精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 2 页，共 12 页个人收集整理仅供参考学习3

20、/ 12 and force feeding chain to run, so as to turn milpa to gripping delivery chains, In the meanwhile, cutterbar cut off the maize plants, the broken plants conveying chain and conveying dial gripping under the common function of bluegrass chain conveyor back into pick spike roller; Tension device

21、is used to adjust the tensioner degree of the conveyor chain so as to make the clamping stalks of clamping conveying chain more stable and reliable.资料个人收集整理，勿做商业用途Positivefeed Chain Positivefeed chain is located below the nearsidedivider ,dedicated to cooperating with it to force-feed the corn plant

22、s with different Line spacing. The selection of the speed of positivefeeding chain have a great effect on plants clamping transmission. Excessive speed will make plants clamping feeding within the same lines, causing the phenomenon such as stem being cut off or jamed occur; however, the low speed ma

23、y make the function of Feeding chain disapper.资料个人收集整理，勿做商业用途Figure 2. Shetch of gripping delivery mechanism 1.positivefeeding chain 2. Passive sprocket 3. Tensioningdevise 4. Gripping board 5. Conveyor chain资料个人收集整理，勿做商业用途Theoretically, the speed of the positivefeeding chain, the level points speed

24、 should be equal to , ,the marching speed of the machine , but in actual work process, the influence factors of the speed of positivefeeding chain include: m v_ , thefront rake of positivefeeding chain, _ , aperture has forcedfeeding speed chain of Angle, before, and conditions, etc.In order not to

25、make the machine push down the stem when it ismarching,the level points speed of the positivefeeding chain should be greater than ,the marching speed of the machine.资料个人收集整理，勿做商业用途Figure 3. Velocity decomposition of conveying chain资料个人收集整理，勿做商业用途3.1.2 Gripping Delivery Chain While Gripping conveying

26、 chain is working, it is necessaryto ensure that the cutted plants are transported to spike pickingroller timely and reliable, and maintained a certain distance between the transported plants, to make spike picking roller load evenly.During Work, select maize plants to make velocity analysis in dot

27、o in gripping chain, just as fig. 3shows. w v , its absolute velocity is induced as follows:资料个人收集整理，勿做商业用途wmtvvv(1) 22coswmtmtvvvv v(2) Where: the speed of gripping chain ; And by: sin()sintmefvv(3) By type (2) and (3) we know that: sinsin()K(4)Known by Type (4) ,While 21,K,the absolute velocity,mv

28、,point in the 精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 3 页，共 12 页个人收集整理仅供参考学习4 / 12 direction of clamping chain (bacward) and make Angle with horizontal line; While21,K, Absolute speed and stalks will move forward a certain angle, which will go against conveying the corn plants smoothly. Combi

29、ned with the performance testing of gripping conveying in the field , when the size of belongs to 10 ? 20 ，022 ,K=23.1和，this is the best situation.资料个人收集整理，勿做商业用途3.2 Vertical Picking and Chopping Cutter Vertical picking and chopping cutter is a critical component of picking both spike and stem , as

30、shown In figure 4 , this device is mainlymade up of a Vertical spike picking roller, fixed knife, moving knife, Chopping cylinder.etc.资料个人收集整理，勿做商业用途Figure 4. Vertical picking and chopping cutter 1.Vertical spike picking roller 2.Vertical stem pulling roller资料个人收集整理，勿做商业用途3.Moving blade 4.The fixed

31、knife 5.Chopping cylinder资料个人收集整理，勿做商业用途3.2.1 The Scheme of Power Drive The Scheme of Power Drive of Vertical picking and chopping cutter is shown in figure 5 .When it works, power driven by engine slow down to the input axis of chopped gearbox through the pulleys and double sprocket , the power dri

32、ve shredding mechanism to run through a set of bevel gear; left behind the chop gearbox there are a group of driving chain (chainwheel of middle size and large size) transmit the power to spike picking chopped gearbox and then divide the power to stem pulling roller ear the bevel gear of the speed c

33、hanging box; Above the stem pulling roller and spike picking are a group of driving chains, the power is transmitted from stem pulling roller to spike picking roller to pick the spikes. In The input axis of the spike picking gearbox lies the small chainwheel and pulley,it functions as transmitting t

34、he power to cluster transportation reciprocating type cutter.资料个人收集整理，勿做商业用途3.2.2 Vertical Spike Picking Roller Vertical spike picking is completed while corn ear are drooping, compared to the average Horizontal spike picking, the picked cluster can quickly break away from spike picking roller, grea

35、tly reduce the breakage rate and the loss rate of grain. In order to strengthen the ability stem pulling and spike picking, behind the spike picking roller are in pairs stem pulling roller , can pull stem while stalks, force feeding the stalks to hobbing cutter to chop,make the conveying of stalks u

36、nobstructed and not jam between the spike picking roller and hobbing cutter. The plane lies in the two Axis of vertical spike picking device and its vertical plane forerake the degree of 25 35 , maize plants enter into verticalspike picking roller pick spike through grippingconveying feeding device

37、by gripping. Plant in arc blockunder the effect of arc-shaped bluegrass board with picking spike into 50 roller line 70 Angle. Due to the ascension of spike picking roller, between the plants of which spike are picked and spike picking roller there exist a vertical Angle and the plants are transport

38、ed backward to chopping cylinder to chop.资料个人收集整理，勿做商业用途Figure 5. sketch of power drive 精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 4 页，共 12 页个人收集整理仅供参考学习5 / 12 1.Pulley 2.Big sprocket3.Small sprocket4.Spike picking gearbox资料个人收集整理，勿做商业用途5.Chopping gearbox 6.Double sprocket 7.Middle sprocket资料个人收

39、集整理，勿做商业用途After plenty of indoor performance test, this design determines the diameter of vertical spike picking roller as 84mm,the speed of the spike picking roller is 1080r/min.资料个人收集整理，勿做商业用途3.2.3 Chopping Cylinder (1) the determination of the feeding entrance width资料个人收集整理，勿做商业用途The productivity

40、 of the stalks chopping are calculated bythe following type :资料个人收集整理，勿做商业用途12cCQ=60KYddlz nab(5) Where:Q Productivity of the design, the value is30000kg/h;资料个人收集整理， 勿做商业用途KcFill factor of the feeding stalks, the value is 0.6; 资料个人收集整理，勿做商业用途lChopping length, the values is 25mm; dzThe numberof movin

41、g blade, and design thevalue for four pieces;资料个人收集整理，勿做商业用途dnSpeed of mainshaft, and design the value for2100r/min;资料个人收集整理，勿做商业用途YcUnit weight of stalks after campaction, and designthe value for400 kg/m3;资料个人收集整理，勿做商业用途b The feeding entrance length, design the value for510mm.资料个人收集整理，勿做商业用途Substit

42、ue the above data into the above type,we obtained: a = 1.96 mm , in this design we select a = 20mm.资料个人收集整理，勿做商业用途(2) The determination of the chopping cylinder The chopping cylinder diameter are obtained by the following type:资料个人收集整理， 勿做商业用途22 30dnDDv(6) 60dvDn(7) Where: Dthe chopping cylinder dia

43、meter; vLinear velocity in the two endpoint of the blade line of the moving blade资料个人收集整理，勿做商业用途dnMoving blade line two endpoints, design value for linear 25m/s; The chopping cylinder speed, the design value is 2100r/min.资料个人收集整理，勿做商业用途精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 5 页，共 12 页个人收集整理仅

44、供参考学习6 / 12 Substitue the above data into the above type we obtained that the chopping cylinder diamete is 227mm, in this design we select chopping cylinder diameter for 680 mm.资料个人收集整理，勿做商业用途3.3. Helicinae and Throwing Apparatus As Figure 6 shows, helicinae and throwing apparatus is mainly comprise

45、d of auger conveyor, throwing impeller and throwing canister, etc. And the auger conveyor is mainly made up of plummer block, augering trough, augering axle, augering blade and augering axle pulleys, etc.资料个人收集整理，勿做商业用途Basic Dimensions for Auger ConveyorAuger conveyor pass through the bottom of the

46、driving cab,according to operating requirements ,make augering trough L= 720mm augering axis diameter d = 60mm , augering blade diameter r = 270mm, Screw torque S = 250mm资料个人收集整理，勿做商业用途Figure 6. Sketch of helicinae and throwing apparatus资料个人收集整理，勿做商业用途1. Plummer block 2. Augering trough 3.Augering a

47、xle资料个人收集整理，勿做商业用途4. Augering blade5. Impellerseaming 6.Impeller shaft资料个人收集整理，勿做商业用途4. Feld Experiment and Analysis of theResults 4.1 Test Condition We chose click on ChangYi farm, WeiFang city, ShanDong province as the Test site .The Plots are a no-till seeding Corn land in one year two ripe area.

48、 The row spacing are 275mm, line spacing are 650 mm, the corn plant height are2520mm and the stem diameter is 25 mm, the lowest height for ear are 920mm, bending rate is 2.6%, plant lodging rate is less than 2%, cluster prolapse rate is 2%, maize yield rate is 5912kg / hm2, moisture content of the s

49、talks is 75%.资料个人收集整理，勿做商业用途4.2 Test Method According to the quality inspection index of the harvestquality of corn combine established by the masterstation of farm machinery test of Ministry of Agriculture, performance test content of harvest quality includes the forward speed of the machine, kerne

50、l lossing rate, cluster lossing rate, kernel crushing ratio, working productivity, etc. the main inspection factors are the test program of corn harvest machine and the test items and test method of corn harvest machine 14-15.资料个人收集整理，勿做商业用途4.3 Test Results and Analysis During the test process ,the