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液压打包机主压电机泵组采用永磁同步电动机泵

发布日期: 2019-11-10

  液压打包机主压电机泵组采用永磁同步电动机泵组后,根据电机与泵的技术性,高速允许1800r/min。因此,电机泵组即可以1800r/min的转速工作在主压/脱箱机构的低负载阶段(提高电机的负荷与能效)。

液压打包机

  前面已经叙述,在(zai)主压(ya)/脱箱机(ji)(ji)构待(dai)(dai)机(ji)(ji)时(shi)(shi),使液压(ya)打(da)包机(ji)(ji)电(dian)(dian)(dian)机(ji)(ji)泵(beng)组(zu)停(ting)转(zhuan),必然(ran)节电(dian)(dian)(dian),但通常情况,主压(ya)/脱箱机(ji)(ji)构待(dai)(dai)机(ji)(ji)均只(zhi)有几(ji)十秒(miao),为(wei)避免电(dian)(dian)(dian)机(ji)(ji)频繁地承受(shou)快速启动带来(lai)的(de)(de)(de)瞬时(shi)(shi)大电(dian)(dian)(dian)流(liu)的(de)(de)(de)冲击伤(shang)害,在(zai)几(ji)十秒(miao)内,也不适合(he)让永(yong)磁同步电(dian)(dian)(dian)动机(ji)(ji)完全停(ting)止,经测算(suan),在(zai)空载(zai)时(shi)(shi),电(dian)(dian)(dian)机(ji)(ji)泵(beng)组(zu)以(yi)300r/min的(de)(de)(de)转(zhuan)速为(wei)佳(jia)。主压(ya)电(dian)(dian)(dian)机(ji)(ji)采(cai)用(yong)永(yong)磁同步电(dian)(dian)(dian)动机(ji)(ji)后,在(zai)压(ya)缩(suo)一个棉包的(de)(de)(de)过(guo)程,主压(ya)电(dian)(dian)(dian)机(ji)(ji)泵(beng)组(zu)的(de)(de)(de)转(zhuan)速如上图。

  液压(ya)(ya)打包机(ji)电(dian)机(ji)的(de)输出(chu)(chu)功(gong)(gong)率(lv)N=液压(ya)(ya)泵(beng)的(de)功(gong)(gong)率(lv)=p·n·q·ηV/(612η),在主压(ya)(ya)上(shang)行和脱箱下(xia)(xia)行低(di)负载(zai)阶段,p恒(heng)定(ding),电(dian)机(ji)的(de)输出(chu)(chu)功(gong)(gong)率(lv)与转(zhuan)速n成(cheng)正比,在主压(ya)(ya)下(xia)(xia)行的(de)初始(shi)阶段,负载(zai)虽不大,但也是(shi)逐步增(zeng)大的(de)。永磁同(tong)步电(dian)动(dong)机(ji)过额定(ding)频率(lv)(速)运转(zhuan)时为(wei)恒(heng)功(gong)(gong)率(lv),当(dang)打包机(ji)电(dian)机(ji)泵(beng)组以1800r/min的(de)转(zhuan)速工作时,必须设定(ding)液压(ya)(ya)压(ya)(ya)力发讯值p,当(dang)p·n·q·ηV(/612η)达到电(dian)机(ji)额定(ding)功(gong)(gong)率(lv)时,控制电(dian)机(ji)的(de)转(zhuan)速n降(jiang)低(di),保证电(dian)机(ji)不载(zai)。

  液(ye)压打包机永磁(ci)同步(bu)电动机低(di)于(yu)额定频率运转时为(wei)恒(heng)转矩(ju)(扭(niu)矩(ju)),转矩(ju)=9550N/n。由于(yu)转矩(ju)恒(heng)定,空载时,当(dang)永磁(ci)同步(bu)电动机的(de)转速为(wei)300r/min时,其输出功(gong)率仅为(wei)1500r/min转速时的(de)1/5.

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