LENZE伺服放大器EVS9326-ES特價代理
齒輪減速電機是固定轉速的減速電機,一旦速比選定,電機選定,后輸出轉速是固定的。但實際使用中,還有許多場合要求速度有所變化,如車床的主軸速度、各種攪拌器的攪拌軸速度、輸送不同物品時的輸送機速度等,如何調速是工程技術人員甚為關心的話題。下面把目前工程上應用的各種調速方法進行簡述。
1.有級調速變極調速是簡單和經濟的調速方法。但只限于中小容量(2kw以下)和起動次數不多的場合。通常只能有兩檔速度,能達到的調速比也較小(l:2一6),極限做到三檔;在某些特定的行業,如車床等,往往用帶排檔的齒輪箱進行有級調速。雖有兒檔速度,但調速范圍不大。
2.無級調速可分成機械式和電氣式。前者常見方法是在電機與齒輪箱聯結處插人機械無級調速裝置(主要有皮帶盤式、摩擦盤式)。其優點是調速平穩,結構不復雜,適用于惡劣環境;缺點是調速范圍小(一般在1:lO以內)盆皮帶和摩擦盤屬易耗件,需定期維護換。后者是對異步電機進行串級調速、轉子電阻調速或對直流電機進行調壓調速等。
工作壓力：輸入馬達油液的實際壓力，其大小決定于馬達的負載。馬達進口壓力與出口壓力的差值稱為馬達的壓差。額定壓力：按試驗標準規定，使馬達連續正常工作的壓力。
2．排量和流量
排量：在不考慮泄漏的情況下，液壓馬達每轉一轉所需要輸入液體的體積。Vm (m3/rad)流量：不計泄漏時的流量稱理論流量qMt，考慮泄漏流量為實際流量qM。
3．容積效率和轉速
容積效率ηMv：實際輸入流量與理論輸入流量的比值。
4．轉矩和機械效率
在不計馬達的損失情況下，其輸出功率等于輸入功率。實際轉矩T：由于馬達實際存在機械損失而產生損失扭矩ΔT，使得比理論扭矩Tt小，即馬達的機械效率ηMm：等于馬達的實際輸出扭矩與理論輸出扭矩的比. It is highly recommended that if the service factor is less
than 1.0 or greater than 2.0, that the application be discussed
with a Dings Representative or the designer of the
system or machinery.
The most common service factors are 1.0, 1.4 and 2.0.
For most standard applications, a 1.4 service factor would
be used. These types of application would include dynamic
stopping and holding applications where the brake would
typically provide a slightly greater amount of torque than the
motor output but still not create a high shock stop. A 1.0
service factor would typically be used in any non-critical or
non-holding applications where a soft stop (longer stop
time) would be required. A 2.0 service factor would be used
for applications where extra torque is required to ensure
adequate holding. These brakes would also have a faster
stop time and thus put more shock into the system.
In all cases, thermal capacity and/or stop time (dynamic
shock) should be considered for the application to ensure
proper brake sizing, torque level and service factor.
EVS9326-CSV003
EVS9326-ESV100
EVS9326-ESV004
EVS9326-ESV104
EVS9327-CSV003
EVS9327-ESV100
EVS9327-ESV004
EVS9327-ESV104
EVS9328-CSV003
EVS9328-ESV100
EVS9328-ESV004
EVS9329-ESV100
EVS9329-ESV004
EVS9330-ESV100
EVS9330-ESV004
EVS9331-ESV100
EVS9331-ESV004
EVS9332-ESV100
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