Energy-saving technology studies 2000t large hydraulic press

2 experiments purpose purpose of experiment of energy-saving technology research as follows: 1) electric equipment of division of induction motor intelligence and transducer apply medium section report to lead contrast in hydraulic press. 2) part electric equipment and transducer are right in hydraulic press application overall the contrast that systematic performance affects. 3) the contrast that omnibus in hydraulic press application price compares part electric equipment and transducer. Large hydraulic press of 2000t of 3 tests result is energy-saving the experiment is electric control ark ends at was being debugged on July 3, 2006 official investment moves, check through the running test January, on August 3, 2006, through checking power instrument (ACR220E) obtain data of the following test (bide one's time section report mode) . In the experiment, we still had a test to the hydraulic pump physical characteristic of 2 000t hydraulic press. The transducer set of drive L# hydraulic pump controls mode to do not have speed sensor vector, hydraulic pump moves in 50Hz when regular job, the output electricity that carries the transducer when biding one's time for nothing is 40. 6 A: Bide one's time the job when section report mode is in 5 Hz, the output electric current of transducer is 37. 2 A. When transducer controls mode to do not have speed sensor vector, electromotor job is in means of constant magnetic flux, accordingly its output torsion and output electric current to become direct ratio.

Can conclude from this: Hydraulic press of 2 000 T belongs to constant torsion load basically for hydraulic pump. 4 technologies are analysed 4. Electric equipment of division of intelligence of 1 induction motor and transducer apply medium section report to lead contrast to pass the running test test of a month in hydraulic press, by on watch test data can reach the following conclusion. 1) overall it is annual and OK to use an electric equipment hind section report: Report of have rendered great service is spent for 3x12x (1714-1655) =2124 KW-h; Spend without result report for 3x12 X (6 746-5114) =58752kvar-h. The rate of report of section of have rendered great service of part electric equipment is 34 ％ , it is without rate of report of work red-letter day 24. 2 ％ . 2) overall after using transducer breathe out every year with section report: Report of have rendered great service spends for 3x12x (1 714 1 029) =24 660 KW-h: Spend without result report for 3x12x (6 746 179) =236 412 Kvar-h. The rate of report of section of have rendered great service of transducer is 40 ％ , it is without rate of report of work red-letter day 97.

3 ％ . The meaning of report of section of have rendered great service depends on expenditure of OK and direct managing charge of electricity, reduce manufacturing cost. The meaning that does not have report of work red-letter day depends on reducing the circuit loss of generatrix of workshop power supply, reduce 2 electric current of workshop distribution transformer, it is OK to do not have result electric current managingly sell one's own things gives the device of new setup in electrified wire netting, dissolved the workshop distribution transformer after adding equipment newly to add look problem thereby. By above section report data can be seen, it is plan of part electric equipment no matter, still be transducer plan, do not have managingly result is far get greatly than have rendered great service much, the indirect profit that brings to workshop electrified wire netting without report of work red-letter day is very apparent. 4.

2 electric equipment and transducer are in hydraulic press application right overall the comparative intelligence that systematic performance affects part electric equipment is through detecting ceaselessly the working status of electromotor, change the input voltage of electromotor thereby. Detect when part electric equipment electromotor is in carry gently or when laden and constant change, through adjusting the input voltage of electromotor, make the output power of electromotor and real time load match, the cupreous damage that reduces electromotor thereby and iron caustic, improvement of electromotor start and stop plane performance, achieve section report result. Its advantage is the price low and the rotate speed that won't change electromotor, but energy-saving space is lesser. Transducer section report is the output power that will reduce hydraulic pump through reducing electromotor rotate speed, make the output power of hydraulic pump and real time load match, the cupreous damage that reduces electromotor and iron caustic, power factor that raises electromotor, improvement of electromotor start and stop plane performance, and can reduce pump loss, obtain section report thereby, reduce noise and the effect that prolong hydraulic pump life. By the test the result is knowable, the hydraulic pump of hydraulic press of 2 000 T belongs to constant torsion load basically. The condition carries to fall in hydraulic press sky, hydraulic pump rotate speed is reduced for 1 ／ after 10 rated rotate speed, the power of have rendered great service that its consume also is reduced accordingly into direct ratio for 1 ／ of 10 consume power formerly, thereby can substantially section report. Its advantage is section report effect better, lengthen at the same time, the life of hydraulic pump and reduced noise, defect is investment big and influential to the working status of hydraulic press. 4.

The contrast that omnibus in hydraulic press application price compares 3 electric equipment and transducer by afore-mentioned analysises knowable, in 2000t large hydraulic press the transducer in energy-saving experiment showed the superior performance that part electric equipment cannot compare, use transducer namely rate of integrated section report is had to be as high as 85 after energy-saving control.

7% , reduce machine tool noise and the effect that prolong hydraulic pump life. Its defect: Because it is,come true through reducing the rotate speed of hydraulic pump to come energy-saving, the working position to hydraulic press is so influential. But, this one defect can be solved through electric control. Although part electric equipment won't change the rotate speed of electromotor, do not have an influence to the working status of hydraulic press, but its energy-saving space is lesser. Analyse than coming from the omnibus price of part electric equipment and transducer. Transducer price is the homebred Sen Lan of a 75 KW 3. 30 thousand yuan, price of part electric equipment is the homebred Qilida of a 75 KW 1.

30 thousand yuan, 4 the rate of integrated section report of transducer is part electric equipment. 285 times, and 2 its price is part electric equipment only. 538 times, at the same time energy-saving plan has transducer energy-saving plan institute does not have part electric equipment reduce a machine tool noise and prolong hydraulic pump life these two clear advantages, lengthen hydraulic pump life to mean managing equipment upkeep costs, reducing machine tool noise is the improvement that makes an environment to worker worker worker, also make due contribution for processing of environmental noise pollution at the same time. The place on 5 conclusion put together is narrated, in 2000t large hydraulic press energy-saving plan showed the transducer in energy-saving experiment the superior performance that energy-saving plan cannot compare part electric equipment, namely rate of integrated section report is as high as 85. 7 ％ , still have at the same time reduce machine tool noise and the distinct effect that prolong hydraulic pump life. Accordingly, the omnibus price of energy-saving plan compares transducer excel part electric equipment is energy-saving plan. CNC Milling