Common V takes the design of transmission

1, 92) (unit: KW) such, below operating condition, the rated power that belt of odd root V can transfer is [KL (7-16) of · of Ka of P1]=(P1+DP1) · is expressed 7 - Ka(of correction coefficient of 5 packets of horn is picked from GB13575.

1 - 92) is expressed 7 - belt length of 6 common V spends correction coefficient KL (pick from GB13575.

1 - 92) 3, the general and foregone condition when design computation and V of parameter choice design take drive is: 1) circumstance of the utility of transmission, job and prime mover type; 2) delivered power P; 3) the rotate speed N2 of big, zonule annulus and N1; 4) ask to wait to the dimension of transmission. Design calculative is main content is affirmatory: 1) the model that V brings, length and root number; 2) the center is apart from; 3) take round of datum diameter and structural measure; 4) action is in the pressure on the axis; Design computation move is as follows: 1. The rated power that decides – of – of – of the P in type delivers P (kW) of · of computational power Pc Pc=KA (KW) ; Coefficient of operating mode of – of KA – – (express 7 – 7) carry the burden that start sky of KA of operating mode of KA of coefficient of watch 7-7 operating mode, gently to start work everyday Xiaoshi is counted (H) ＜ 1010~16 ＞ ＞ of 16 ＜ 1010~16 16 load change the smallest.

5kW) , conveyer of centrifugal type water pump and compressor, small negative charge 1.

01.

11.

21.

11.

21.

3 load are fluctuant zonule type conveyer (inhomogenous bear) , fanner (＞ 7.

5kW) , rotate type water pump and compressor (be not centrifugal type) , machine tool of cutting of dynamo, metal, printing machine, rotate sieve, sawmill and woodworker 1.

11.

21.

31.

21.

31.

4 load are fluctuant water pump of the greater opportunity that make a brick, bucket elevator, reciprocating type and compressor, crane, grinder, strong cut machinery of machine tool, balata, vibrating separator, spin conveyer of mechanical, burden 1.

21.

31.

41.

41.

51.

6 load are fluctuant very big crusher (rotate type, gnathic type) , molar machine (the ball is ground, the club is ground, the canal is ground) 1.

31.

41.

51.

51.

61.

8 note: 1. Carry for nothing, gently start, electromotor (communication is started, trigonometry is started, flow continuously and encourage) , the internal-combustion engine of 4 crocks of above, motivation machine of shaft coupling of centrifugal type clutch, hydraulic; 2. Burden is started, electromotor (online communication is started, shed answer encourage continuously or string together encourage) , 4 crocks of the following internal-combustion engine. 2. Choice V takes model ground computational power Pc and N1 of zonule annulus rotate speed by the graph 14 choices V takes 7 – model. Should be in of two kinds of model cross a line around when, can calculate at the same time to two kinds of model, choose a better kind finally. Note: Y basically pass motion, reason did not include 7-14 of the graph inside the graph type selecting plan of common V belt 3. Take what round of datum diameter D1 and D2 take to reduce to curve stress to should use older tape certainly annulus diameter, but this makes the outline dimension of transmission increases. Take D1 ≥ Dmin commonly (express 7 – 3) , the smallest datum diameter that compares a regulation slightly somes big. Take round of datum diameter to be able to press computation greatly. Diameter of big, zonule annulus all should press belt annulus commonly circle of datum diameter series is full (express 7 – 8) . Compare when transmission only when the requirement is more accurate, e of ability consideration sliding ratio will be calculated big rounds diameter, namely, at this moment D2 can not press a watch 8 circles of 7 – are full. Express 7 – belt of 8 common V takes round of datum diameter series (pick from GB13575.

1, 92) 4. The speed V that checking computations takes by knowable, when delivered power is certain, belt speed heals tall, what need F of effective and circumferential force to heal small, the root number that consequently V brings can decrease. But belt speed is exorbitant, the centrifugal force of the belt increases significantly, reduced belt and tape annulus the osculatory pressure between, reduced the working capacity of transmission thereby. In the meantime, belt speed is exorbitant, make take bypass inside unit time the number of belt annulus increases, stress change is frequent, lowered the fatigue life of the belt thereby. By the watch 7 – 4 visible, after belt speed reachs some value, adverse element will make main rated power is reduced. So belt speed is commonly inside V=5~25m/s is advisable, the most advantageous inside V=20~25m/s limits. If belt speed is exorbitant (Y, Z, A, B, C V>25m/ .

S; D, E V>30m/s) when, should reelect takes round of datum diameter lesserly. 5. Affirmatory center is apart from A and V to take datum length Ld to ask according to the structure center is apart from A0 first. The center is apart from small structure compact, but make horn of the bag on zonule annulus is reduced, reduce the working capacity that takes drive, be apart from as a result of the center at the same time small, the length that V takes is short, below fixed rate, the increase of stress circulation number inside unit time and cause service life reduce, so the center is apart from unfavorable obtain too small. But also should not be too big, too big divide outside having contrary advantages and disadvantages, when rate is higher cause easily still of the belt vibratile. Take drive to V general and desirable 0.

After A0 of 2(d1+d2) primary election of ≤ of 7(d1+d2) ≤ A0, the datum length Ld0 that calculates at the beginning of V belt can calculate by next type according to geometrical relation: (7 – 17) according to type (7 – 17) the Ld0 value that calculates, should by the watch 2 make choice of of 7 – the datum length Ld of close, decide real center is apart from A again next. Because V takes the center of transmission to be apart from,can adjust commonly, can calculate approximately with next type so A is worth (Mm) (7 – 18) considering be taken to install V and must adjust surplus, accordingly, the least center is apart from for Amin=a – 0.

015Ld (mm) takes like V pulling force relies on to increase a center to be apart from first obtain, real center is apart from should move big. Consider again adjust in using for many times, the largest center is apart from should be (Mm) 6. Checking computations zonule annulus the A1 including part on zonule annulus can press the A1 including part that go up type (7 – 1) computation takes transmission to have certain working capacity to make, 120 ° of ≥ of general requirement A1 (special situation allows A1 ＝ 90 ° ) . If A1 is less than this value, can increase a center to be apart from A appropriately; When if the center is apart from,cannot be being moved, can add Zhang Jin annulus. From on type can see, a1 also is concerned than I with transmission, d2 and D1 differ bigger, namely I is bigger, criterion A1 is smaller. Pass big requirement to be apart from in the center normally next assurance that wrap horn to had been not sent small, place shoulds not be too great with transmission comparing. Common V takes transmission to recommend I ≤ commonly 7, can arrive when necessary 10. 7. Basis of Z of number of root of affirmatory V belt is calculated power Pc decides ≥ by next type (7 – 19) get power to make every V is taken evener, root number is unfavorable and so too much, should be less than 10 normally, should reelect otherwise V brings model, redesign. 8. Affirmatory first tensile F0 is proper pulling force is one of main factors that assure to take transmission to work normally first. First pulling force is small, chafe force is small, easy appear skid. Conversely, pulling force passes first big, can make V is taken pull stress to increase and lower life, make the pressure of axis and bearing increases. To non-automati Zhang Jin's belt transmission, as a result of the lax action of the belt, exorbitant first pulling force maintains not easily also. Transfer power to assure what what need, do not appear again skid, when the adverse effect that considers centrifugal force, belt of odd root V is proper pulling force is first (N) (7 – 20) because new area is easy lax, be opposite so non-automati Zhang Jin's belt transmission, when installation is taken newly pulling force should is first afore-mentioned 1 what tensile computation is worth first.

5 times. First pulling force is appropriate, usable and undermentioned method has similar test. If pursue,7 – are shown 15 times, the midpoint place that taking the span of point of tangency with belt annulus is perpendicular add one load G at taking, if take edge span,the deflection of generation of place of every 100mm midpoint is 1.

6mm (flinch horn is namely 1.

8 ° ) when, criterion first tensile and appropriate. At this moment midpoint is in total deflection Y=1.

6t/100mm. Span long T is OK actual measurement, or press type calculates (7 – 21) the computation of G is as follows: The V of new setup takes (7 – 22) the V after movement takes (7 – 23) the least limiting value (7 – 24) the tensile increment at the beginning of – of – of – of the DF0 in type (express 7 – 9) express 7 – 9 first tensile increment (unit: N) belt YZABCDEDF0610152029.

458.

81089. The tight side tension of the belt of firm intention pressure FQ drive on the axis and countershaft of loose edge pulling force generate pressure, the vector that it is equal to strict limit and loose edge pulling force and. But general and multi-purpose first tensile F0 by the graph 16 similar ground use 7 – next type are gotten (N) (7 – 25) zonule of – of – of – of the A1 in type annulus the bag horn that go up; V of – of Z – – brings a number. 4, belt annulus is designed is weight to the main demand of belt annulus sex of craft of light, treatment good, quality distributings the even, groove side that takes a contact with common V Ying Guangjie, take in order to reduce wear away. To cast and soldering belt annulus, internal stress wants small. Belt annulus by flange, annulus with hub 3 parts are comprised. The outer lane of belt annulus is annular the part calls flange, install the canister body part on the axis to call boss, intermediate part is called annulus. Graph the structure of belt annulus takes 7 – 17 V round of configuration by diametical size commonly usedly S sincere is taken annulus (use at the belt with lesser dimension annulus) , P abdomen board belt annulus (use at in the belt of small size round) , H orifice plate is taken. Round of groove dimension of flange part by V belt model checks a watch 7 – 10. Because common V takes the included angle between two flank,be 40 ° , when bending to get used to V belt to be on belt annulus sectional be out of shape, wedge horn is reduced, reason stipulates common V takes round of groovy horn F to be 32 ° , 34 ° , 36 ° , 38 ° (reach belt annulus diameter to decide by the model of the belt) . Express 7-10 common V round of groove dimension of belt annulus (pick from GB/T13575.

1-92) Bp5 of datum width of project symbol chamfer YZABCDE.

38.

511.

014.

019.

027.

032.

Deep Hamin1 of the chamfer on 0 datum line.

62.

02.

753.

54.

88.

19.

6 datum line issue groovy deep Hfmin4.

77.

08.

710.

814.

319.

923.

± of E8 of 4 chamfer span 0.

312 ± 0.

315 ± 0.

319 ± 0.

425.

5 ± 0.

537 ± 0.

644.

5 ± 0.

The distance of face of semmetry of 7 the first chamfer to end panel 18 ± of F7 ± thick Dmin55 of 1 the smallest flange.

567.

5101215 take round of wide BB=(z-1)e+2f Z, annulus groove counts external diameter the ≤ of datum diameter D with corresponding ° of F32 of horn of Da annulus chamfer 60------34 ° - 80 ≤ of ≤ 190 ≤ of 118 ≤ 315- - 36 °-----475 ≤ of ≤ 60038 ° - 80 ＞ of ＞ 190 ＞ of 118 ＞ 475 ＞ of 315 ＞ 30 ′ of ± of 600 extreme deviation the commonly used material of belt annulus is cast-iron, be like HT150, HT200. When rotate speed is higher, usable cast steel or armor plate solder; Usable cast aluminium alloy or project are plastic when small-power. The other structure dimension of belt annulus can consult concerned data. 5, because transmission is taken,V carries the tension station of transmission is not complete elastomer, after taking the job for some time, because the meeting is stretchy be out of shape and produce lax phenomenon, make pulling force is reduced first, the working ability of the belt also drops subsequently. Accordingly, to assure to need first tensile, answer to often check seasonable and new Zhang Jin. Commonly used Zhang Jin method is to change the center that heads transmission to be apart from, if install the motor of belt annulus on slideway to use bolt 2 adjust (see a picture 7 – 18a) or swing electric machinery base 1 adjust bolt 2 make base rotational (see a picture 7 – 18b) , can achieve Zhang Jin's goal. If take the center of transmission to be apart from,cannot adjust, can use device of Zhang Jin annulus (see a picture 7 – 19) . Zhang Jin annulus sets the loose limit that bringing commonly. The inside that V takes transmission to often be Zhang Jin wheel load by the side of the pine nears large area annulus, lest make take,bear to bend reversely, lower the life of the belt, and do not make the bag horn on zonule annulus is reduced overmuch. The 7-19 of graph of fixed tension station that 7-18 of A) B) graph takes exemple of device of Zhang Jin annulus 1 design is like 7 – the belt transport drive that graph 7-20 place shows the belt in plan I transmission. Foregone: P=11kW, n1=1460r/min, i=2.

1, general use uses time 10 years (work every year 250 days) , dual class makes successive work, one-way movement. Ⅰ of plan of drive of transport of graph 7-20 belt solves: 1. Pc of affirmatory computation power by the watch 7 – 7 check KA=1 of operating mode coefficient.

2, criterion Pc=KAP=1.

2 × 11=13.

2kW2. Choice V takes ＝ of model basis Pc 13.

2kW, n1=1460r/min, by the graph 7 – 14 choose B model. 3. Take round of datum diameter D1, D2 certainly by the watch 7 – 3, b V belt takes Dmin=125mm of round of the smallest diameter, the basis pursues 7 – 14 in the B range that brings commendatory D1 and express 7 – 8, take D1=132mm, d2=id1=2 of driven pulley datum diameter.

132 ＝ of 1 × 277.

2mm, by the watch series of 8 datum diameter takes 7 – D2=280mm. Transmission comparing, transmission comparing error is, allow. 4. The speed M/s M/s 5 that checking computations takes. Affirmatory center is apart from A and V to take datum length Ld by 0.

≤ of 7(d1+d2) ≤ A0 2(d1+d2) namely 288.

4=0.

2(132+280)=824 of ≤ of 7(132+280) ≤ A0 takes a center to be apart from the datum length Ld0 that V belt calculates at the beginning of A0=560mm first by the watch 7 – 2 choose real center of Ld=1800mm of standard datum length to be apart from take A=572mm6. Checking computations zonule annulus go up the A1 that include part is appropriate 7. Affirmatory V brings a number by D1=132mm, n1=1460r/min, check a watch 7 – 4, v of B odd root takes the P1=2 of main rated power that can deliver.

48kW, power increment DP1=0.

46kW, by the watch 7 – 5 check so that wrap horny coefficient Ka=0.

96, by the watch 7 – 6 check so that length amends coefficient KL=0.

95; The root number that needs to take takes Z ＝ 5 8. Affirmatory first tensile F0 by the watch 7 – 3, b belt Q=0.

17kg/m9. The FQ10 of the force that press an axis that decides action to go up in the axis. Belt annulus is designed (slightly) CNC Milling