气缸计算（Cylinder calculation）
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The size or displacement of the engine, the shape of the engine is difficult to distinguish its size.
The amount of space vacated by the engine piston in the cylinder from TDC to TDC is what is called the working volume of the cylinder. Instant displacement (C.C)
总经理年会发言稿Calculation of displacement (C.C):
VL= (PI / 400000000 D2 * s * I)
Type
VL--- engine displacement, unit: ml (C.C);
Pi - pi;
D --- cylinder diameter, mm (mm);
S --- piston stroke, unit: mm (mm);
I --- cylinder number.
Calculation of engine output power:
N= (P * Vk * I * n) / (225 * *)
Type
N --- engine power, unit: horpower (metric);
P --- average effective pressure, unit: kg / cm squared; mean effective pressure is a constant imaginary force acting on the top of the piston;
Vk --- the volume of a single cylinder, in units: liters
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Formula for calculating thrust of cylinder
Last update time: 2011/6/7, click: 755
狐狸的
番茄龙利鱼怎么做Cylinder - working principle
Determine the thrust and pull of the piston rod according to the magnitude of the force required. When lecting the cylinder, the output power of the cylinder should be slightly margin. If the lection of small bore, the output power is not enough, the cylinder not working properly; but the diameter is too large, not only the heavy equipment, high cost, and the gas consumption increas, resulting in energy waste. In the fixture design, should be as much as possible to u force increasing mechanism to reduce the size of the cylinder.
高中毕业自我鉴定Cylinder
The following is a formula for calculating the theoretical output of a cylinder:
F: cylinder theoretical output force (KGF)
'F': the output power (KGF) at the rate of 85% - (F '= F * 85%)
The cylinder (mm): D
P: work pressure (kgf / cm2)
Example: when the working pressure is 3kgf / cm2, how much is the theoretical output force and the output of the cylinder with a diameter of 340mm?
Connect P, D, find the points on F, F ', and get:
F = 2800kgf; F '= 2300kgf
Select the cylinder in the engineering design, according to the theory of the u of pressure and push or pull the size, found from experience in table 1-1.
One example: the u of pressure cylinder is 5kgf / cm2, the launch of the thrust cylinder in 132kgf (cylinder efficiency 85%) Q: the choice of the big cylinder?
The theoretical thrust of the cylinder is F = F \ / 85% = 155 (KGF) from the thrust of the cylinder 132kgf and the efficiency of the cylinder by 85%
By using the theory of thrust pressure - 5kgf / cm2 and the cylinder bore diameter of 63, found lection of the cylinder
can be ud to meet the requirements.
I --- cylinder number;
N - engine speed, unit: rpm;
Tau - engine stroke (stroke) number. Four stroke (stroke) engine =4, two stroke (stroke) engine =2.
Note:
The average effective pressure is an important index to evaluate whether the engine has good working cycle, reasonable structure and good quality. Want to know the average effective pressure of each engine,
Our urs are usually calculated from the formula on the engine instructions.在哪里买电影票
成都周边
The average effective pressure and gas mixing method, fuel type and inlet pressure, inlet temperature and other factors, but also affected by the mixed gas in the process of the quality formation, combustion and gas exchange process work.
The average effective pressure value reflects the design level of the engine. Generally speaking, the average effective pressure value is high. But the average effective pressure value is too high, it will increa the thermal load and mechanical load, thus shortening the rvice life of the engine.
1. lection steps of the cylinder
The type lection of the cylinder shall correctly lect the type of the cylinder according to the requirements and conditions of the work. Taking the single piston rod double acting cylinder as an example, the lection steps of the cylinder are introduced.
(1) the cylinder bore. To determine the output force of the cylinder cylinder according to the load force, so as to calculate the diameter of cylinder.
(2) the stroke of the cylinder. The stroke of the cylinder is related to the occasion of u and the travel of the mechanism, but the full stroke is not generally ud.
(3) calculation of strength and stability of cylinder;
胶片单反(4) the installation form of the cylinder. The installation form of the cylinder depends on the location of installation and the purpo of u. Under normal circumstances, the u of fixed cylinder. The rotary cylinder shall be ud when rotating continuously with the working mechanism (such as lathe, grinding machine, etc.). In addition to the straight-line movement of the piston rod, the shaft pin type cylinder is ud when the arc swing is needed. When there is special requirement, the corresponding special cylinder should be lected.
(5) cushion device of cylinder. Depending on the speed of the piston, a buffer device should be ud.
