Does physical examination of kindergarten teachers have to go to
Publish: 2021-05-10 11:07:29
1. Biographies of Xuanshui by Xu Shuo, The eight trigrams give birth to all things "
this is a saying handed down by Xuan mercury since ancient times...
this passage conceals the truth of the birth of the world...
but the truth has not been known for hundreds of millions of years...
many people regard this sentence left over from four billion years ago as a Dharma
this is a saying handed down by Xuan mercury since ancient times...
this passage conceals the truth of the birth of the world...
but the truth has not been known for hundreds of millions of years...
many people regard this sentence left over from four billion years ago as a Dharma
2.
Thrust F1 on cylinder piston rod= π/ four × D2 × P ×&# 223; N)
tension on cylinder piston rod F2= π/ four × D2-d2 × P ×&# 223; N)
F1: push force when piston rod is pushed out
F2: pull force when piston rod is pulled back
D: inner diameter of cylinder tube (piston diameter)
D: diameter of piston rod
P: pressure of air source
& Load rate (at slow speed)= About 65% fast time= About 30%)
3.
Look at the table below, hoping to help you
4. Calculation formula of cylinder thrust: F: theoretical output force of cylinder (KGF)
F ′: output force of 85% efficiency (KGF) - (f ′ = f) × 85%) d: cylinder diameter (mm) P: working pressure (kgf / cm2)
example: for a cylinder with a diameter of 340mm and a working pressure of 3kgf / cm2, what is the theoretical output force? What is the output of buds
connect P and D, find out the points on F and f ', and get f = 2800kgf; F ′ = 2300kgf
in the engineering design, the cylinder diameter can be selected from the experience Table 1-1 according to its service pressure and theoretical thrust or tension
for example, there is a cylinder with a working pressure of 5kgf / cm2 and a thrust of 132kgf when the cylinder is pushed out (the cylinder efficiency is 85%). Q: what is the diameter of the cylinder to choose
● the theoretical thrust of the cylinder can be calculated as F = f ′ / 85% = 155 (KGF) from the thrust of the cylinder of 132 KGF and the efficiency of the cylinder of 85%
● according to the working pressure of 5 kggf / cm2 and the theoretical thrust of the cylinder, it is found that the selected cylinder diameter is & 59272; 63 cylinder can meet the requirements< The theoretical reference speed of the cylinder is u = 1920xs / a (mm / s), where s is the synthetic effective area of the exhaust circuit and a is the effective area of the piston on the exhaust side.
, air consumption: the amount of air consumed in the cylinder and the piping between the cylinder and the reversing valve when the cylinder reciprocates for one stroke (under standard atmospheric pressure)
2 Maximum air consumption rate: the amount of air consumed per unit time when the cylinder piston moves at the maximum speed (under standard atmospheric pressure)
the maximum air consumption of the cylinder: q = piston area X piston speed x absolute pressure. The commonly used formula is: q = 0.046d & # 178; V (P + 0.1) Q ------ the maximum air consumption of the cylinder under the standard state (L / min) d ------ the cylinder diameter (CM) V ------ the maximum speed of the cylinder (mm / s) P ------ the working pressure (MPA) the calculation method of the air consumption of the cylinder and the gas pipe flow.
F ′: output force of 85% efficiency (KGF) - (f ′ = f) × 85%) d: cylinder diameter (mm) P: working pressure (kgf / cm2)
example: for a cylinder with a diameter of 340mm and a working pressure of 3kgf / cm2, what is the theoretical output force? What is the output of buds
connect P and D, find out the points on F and f ', and get f = 2800kgf; F ′ = 2300kgf
in the engineering design, the cylinder diameter can be selected from the experience Table 1-1 according to its service pressure and theoretical thrust or tension
for example, there is a cylinder with a working pressure of 5kgf / cm2 and a thrust of 132kgf when the cylinder is pushed out (the cylinder efficiency is 85%). Q: what is the diameter of the cylinder to choose
● the theoretical thrust of the cylinder can be calculated as F = f ′ / 85% = 155 (KGF) from the thrust of the cylinder of 132 KGF and the efficiency of the cylinder of 85%
● according to the working pressure of 5 kggf / cm2 and the theoretical thrust of the cylinder, it is found that the selected cylinder diameter is & 59272; 63 cylinder can meet the requirements< The theoretical reference speed of the cylinder is u = 1920xs / a (mm / s), where s is the synthetic effective area of the exhaust circuit and a is the effective area of the piston on the exhaust side.
, air consumption: the amount of air consumed in the cylinder and the piping between the cylinder and the reversing valve when the cylinder reciprocates for one stroke (under standard atmospheric pressure)
2 Maximum air consumption rate: the amount of air consumed per unit time when the cylinder piston moves at the maximum speed (under standard atmospheric pressure)
the maximum air consumption of the cylinder: q = piston area X piston speed x absolute pressure. The commonly used formula is: q = 0.046d & # 178; V (P + 0.1) Q ------ the maximum air consumption of the cylinder under the standard state (L / min) d ------ the cylinder diameter (CM) V ------ the maximum speed of the cylinder (mm / s) P ------ the working pressure (MPA) the calculation method of the air consumption of the cylinder and the gas pipe flow.
5. Your description is not very accurate
is it the thrust output of the cylinder when the pressure is 0.1MPa
what is the area of the cylinder piston π r²= three point one four × 0.04²
when the pressure is 0.1MPa, the pressure on the piston is equal to the pressure × Area = 3.14 × 0.04² × 0,1 × 1000000
pay attention to the consistency of units. PA is n / M & # 178;, Therefore, the piston area should also be calculated in meters. The unit of calculation is n (Newton).
is it the thrust output of the cylinder when the pressure is 0.1MPa
what is the area of the cylinder piston π r²= three point one four × 0.04²
when the pressure is 0.1MPa, the pressure on the piston is equal to the pressure × Area = 3.14 × 0.04² × 0,1 × 1000000
pay attention to the consistency of units. PA is n / M & # 178;, Therefore, the piston area should also be calculated in meters. The unit of calculation is n (Newton).
6. < UL > < P > < / UL >
No.18 5.8km
Nanjing Yangtze River Tunnel
walk about 150m to jiangdongbei road · Dinghuaimen Street Station
take No.18, pass 11 stops to Hanzhong Road · Hanzhongmen station
walk about 210m, Arrive at ping an international financial center
ping an international financial center
2
204 → Metro Line 2 6.7km
3
104 5.8km
< 4
302 6.7km
< 5
133 6.0km
7. Cylinder pressure f = cross-sectional area of cylinder piston X. the pressure per unit cross-sectional area has nothing to do with compression, but only with the pressure of compressed air (pressure per unit cross-sectional area).
8. Unknown_Error
9. It's all fake. Let you pay for the exam first. The interview is actually a hoax. He's worried that you won't go. If you don't believe it, you won't go. He will call you again and again to urge you to go. I won't be fooled anyway. The better you say it, the more fake it is.
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