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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(qian)面已(yi)经叙(xu)述,在(zai)主压(ya)(ya)/脱箱机(ji)(ji)构待机(ji)(ji)时,使液压(ya)(ya)打包(bao)机(ji)(ji)电(dian)(dian)(dian)机(ji)(ji)泵组停转(zhuan),必然节电(dian)(dian)(dian),但通常情况,主压(ya)(ya)/脱箱机(ji)(ji)构待机(ji)(ji)均只(zhi)有几十秒(miao),为避免(mian)电(dian)(dian)(dian)机(ji)(ji)频繁(fan)地承受快(kuai)速启动(dong)带来的瞬时大电(dian)(dian)(dian)流的冲击伤(shang)害(hai),在(zai)几十秒(miao)内,也不适(shi)合让(rang)永(yong)磁(ci)同步电(dian)(dian)(dian)动(dong)机(ji)(ji)完全停止,经测(ce)算,在(zai)空载时,电(dian)(dian)(dian)机(ji)(ji)泵组以300r/min的转(zhuan)速为佳(jia)。主压(ya)(ya)电(dian)(dian)(dian)机(ji)(ji)采用永(yong)磁(ci)同步电(dian)(dian)(dian)动(dong)机(ji)(ji)后,在(zai)压(ya)(ya)缩一个棉包(bao)的过程(cheng),主压(ya)(ya)电(dian)(dian)(dian)机(ji)(ji)泵组的转(zhuan)速如上图。

  液压(ya)(ya)(ya)打包机(ji)(ji)电(dian)(dian)机(ji)(ji)的输(shu)出功率(lv)(lv)N=液压(ya)(ya)(ya)泵的功率(lv)(lv)=p·n·q·ηV/(612η),在主压(ya)(ya)(ya)上行和脱箱下行低负载(zai)阶(jie)段,p恒定(ding)(ding),电(dian)(dian)机(ji)(ji)的输(shu)出功率(lv)(lv)与转速n成正比,在主压(ya)(ya)(ya)下行的初始阶(jie)段,负载(zai)虽不(bu)大,但也是逐步(bu)增大的。永磁(ci)同(tong)步(bu)电(dian)(dian)动机(ji)(ji)过额定(ding)(ding)频率(lv)(lv)(速)运转时为(wei)恒功率(lv)(lv),当(dang)打包机(ji)(ji)电(dian)(dian)机(ji)(ji)泵组(zu)以(yi)1800r/min的转速工作时,必须设定(ding)(ding)液压(ya)(ya)(ya)压(ya)(ya)(ya)力发讯值p,当(dang)p·n·q·ηV(/612η)达到电(dian)(dian)机(ji)(ji)额定(ding)(ding)功率(lv)(lv)时,控制电(dian)(dian)机(ji)(ji)的转速n降低,保证电(dian)(dian)机(ji)(ji)不(bu)载(zai)。

  液压(ya)打包机永磁同步电动机低于额(e)定频率(lv)运转(zhuan)时为(wei)(wei)恒转(zhuan)矩(ju)(扭矩(ju)),转(zhuan)矩(ju)=9550N/n。由(you)于转(zhuan)矩(ju)恒定,空载时,当永磁同步电动机的(de)转(zhuan)速为(wei)(wei)300r/min时,其输出功率(lv)仅为(wei)(wei)1500r/min转(zhuan)速时的(de)1/5.

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