Practice of Microcomputer in the Inspection of Technical Type Compressor

The actual indicator measured after the online monitoring test curve is converted. Using the internal clock of the computer to measure the time taken by the compressor to run through a cycle of $T, the actual speed is: n=60/$T, r/min: $T compression The time it takes for the machine to cycle.

Indicating power Ni=Li/$T, kw where: Li cycle work, kJ, actual cycle analysis calculation theoretically, Li=Qp(x)dv. However, the data collected by the computer is discrete, so numerical integration is used. The way to get the cycle work - Li, such as. We divide the actual loop into two parts, the upper part of the curve is set to P2 (x), and the lower part of the curve is set to P1 (x). The indicated area can be subtracted from the area enclosed by P2(x)-ad-dc-cb by the area enclosed by P2(x)-ad-dc-cb, ie: formula: Lp1(x)=Ezd/2i=1 (p(i)+p(i+1))(x(i+1)-x(i))F/2 where: i- is the number of the data zd- is the number of points between two adjacent dead centers P1(i)- is the pressure at the i-th point of the P1(x) line, Pa; x(i)- is the piston displacement at the i-th point; formula: Lp2(x)=Ezdi=(zd/2)+1(p (i) +p(i-1))(x(i)-x(i+1))F/2 where: the pressure at the i-th point of the P2(i)-P2(x) line, Pa; the rest The meaning of the variable is the same as the above formula.

Indicates the relative loss of power $C = (L suction + L row) / (Li-L row - L suction) in the formula: L suction) the work lost during the inhalation process in one cycle, kJ; L row) in one cycle The work lost in the exhaust process, kJ; where the L-suction and L-row are still obtained by numerical integration for the same reason. What needs to be explained is the determination of the upper 1, 2, 3, and 4 points. These four points determine the upper and lower limits of the numerical integration. The method of finding 1, 4, 2, and 3 points is to search from P1(x) and P2(x), respectively, and retrieve the values ​​of these four points. Record the position number of the four points for analysis and calculation.

Conclusion Through the monitoring of the experimental prototype, the online performance test can directly reflect the reliability and economy of the process compressor. The method is feasible, and the characteristics are as follows: (1) It can directly and accurately display the actual working cycle of the compressor in the cylinder, check the performance parameters of the machine, and timely judge, analyze and predict the hidden troubles of the machine operation. (2) With the monitoring meta-software, the performance parameters such as power, pressure and temperature can be quantitatively calculated in real time. It can also analyze and calculate the loss changes, heat exchange and so on.

PE foam sheet making machine

Pe Foam Sheet Making Machine,Pe Foam Sheet Production Making Machine,Pe Foam Sheet Production Line,Ps Foam Extrusion Line

haiyuanmachinery , https://www.lkhyplastic.com