PROSOFT AN-X2-AB-DHRIO 數(shù)控PLC通訊卡
更深的槽用于擴(kuò)大針閥的頭部并增加摩擦力，以防止因改變針閥設(shè)置而引起的振動(dòng)。如果必須使用普通螺絲刀，一定要使用針閥的淺槽。讓原動(dòng)機(jī)擺動(dòng)約30秒，以排出調(diào)速器油道中的滯留空氣。2.松開(kāi)固定補(bǔ)償指針的螺母，剛好使指針盡可能降低，以獲得最小補(bǔ)償。再次擰緊螺母。補(bǔ)償調(diào)整程序的目的是找到補(bǔ)償針閥和補(bǔ)償調(diào)整指針的特定設(shè)置，在該設(shè)置下，發(fā)動(dòng)機(jī)、渦輪機(jī)或其他類(lèi)型的原動(dòng)機(jī)在速度擾動(dòng)后僅輕微過(guò)沖或下沖（補(bǔ)償指針調(diào)整）即可快速恢復(fù)速度（針閥調(diào)整）。3.逐漸關(guān)閉針閥，直到振蕩停止。如果振蕩沒(méi)有停止，打開(kāi)針閥一圈，并將補(bǔ)償指針向上移動(dòng)前面板指示器刻度上的一個(gè)標(biāo)記。再次逐漸關(guān)閉針閥，直到振蕩停止。如果振蕩沒(méi)有停止，將針閥打開(kāi)1/4圈，并重復(fù)將補(bǔ)償指針向上設(shè)置一個(gè)標(biāo)記。重新測(cè)試調(diào)速器，直到振蕩停止。
本手冊(cè)的“發(fā)動(dòng)機(jī)測(cè)試程序”部分給出了轉(zhuǎn)速下降、高速和低速停止以及停機(jī)螺母調(diào)整。除非您完全熟悉正確的程序，否則不要嘗試對(duì)調(diào)速器進(jìn)行內(nèi)部調(diào)整。補(bǔ)償調(diào)整針閥和調(diào)整指針是補(bǔ)償系統(tǒng)的可調(diào)整部件。它們的設(shè)置直接影響調(diào)速器的穩(wěn)定性。補(bǔ)償必須根據(jù)特定的發(fā)動(dòng)機(jī)和負(fù)載進(jìn)行適當(dāng)調(diào)整，以提供穩(wěn)定的運(yùn)行。當(dāng)發(fā)動(dòng)機(jī)或渦輪機(jī)在調(diào)速器充油后首次啟動(dòng)時(shí)，調(diào)速器可能在恒定速度下穩(wěn)定，但調(diào)速器可能需要調(diào)整。負(fù)載變化后的高速和低速以及緩慢恢復(fù)到正常速度表明需要進(jìn)行補(bǔ)償調(diào)整。最大補(bǔ)償設(shè)置通常提供穩(wěn)定的穩(wěn)態(tài)操作，但在負(fù)載變化時(shí)會(huì)導(dǎo)致更大的斷開(kāi)速度。調(diào)速器中的油達(dá)到其正常工作溫度后，在原動(dòng)機(jī)無(wú)負(fù)載的情況下進(jìn)行以下補(bǔ)償調(diào)整，以確保調(diào)速器提供最佳控制。調(diào)整部件的位置見(jiàn)圖1-1。1.要排出調(diào)速器油道中的滯留空氣，首先擰松固定補(bǔ)償調(diào)節(jié)指針的螺母，使指針處于其向上的極限位置，以獲得最大補(bǔ)償。接下來(lái)，拆下針閥檢修塞并逆時(shí)針打開(kāi)針閥兩圈。使用十字螺絲刀避免損壞孔內(nèi)的螺紋和針閥。螺紋或針閥損壞會(huì)導(dǎo)致調(diào)速器有節(jié)奏地更換燃油。這就是所謂的州長(zhǎng)狩獵。有關(guān)狩獵的更多信息，請(qǐng)參閱第5章。針閥中有兩個(gè)螺絲刀槽，一個(gè)淺槽和一個(gè)深槽，彼此成直角。
The deeper slot is used to expand the head of the needle valve and increase friction to prevent vibrations from changing the needle valve setting. If a plain screwdriver must be used, be sure to use the shallow slot of the needle valve. Allow the prime mover to hunt for approximately 30 seconds to bleed trapped air from the governor oil passages. 2. Loosen the nut holding the compensation pointer just enough to lower the pointer as far as it will go for minimum compensation. Tighten the nut again. The objective of the compensation adjustment procedure is to find the particular settings for the compensation needle valve and compensation adjustment pointer at which the engine, turbine, or other type of prime mover will return quickly to speed (needle valve adjustment) after a speed disturbance with only a slight over or undershoot (compensation pointer adjustment).
After the oil in the governor has reached its normal operating temperature, make the following compensation adjustments without load on the prime mover to be certain that the governor gives optimum control. See Figure 1-1 for location of the adjustment parts. 1. To bleed trapped air from the governor oil passages, first loosen the nut holding the compensation adjusting pointer enough to set the pointer at its extreme upward position for maximum compensation. Next, remove the needle valve access plug and open the needle valve two turns counterclockwise. Use a Phillips screwdriver to avoid damage to the threads inside the bore and to the needle valve. Damage to the threads or to the needle valve will cause the governor to change fuel rhythmically. This is called governor hunt. See Chapter 5 for more information on hunting. There are two screwdriver slots in the needle valve, a shallow slot and a deep slot, located at right angles to each other.
Speed droop, high and low speed stops, and shutdown nut(s) adjustments are given in the “Test Procedures on the Engine” section of this manual. Do not attempt internal adjustment of the governor unless you are thoroughly familiar with the proper procedure. Compensation Adjustments The needle valve and adjusting pointer are adjustable parts of the compensation system. Their settings directly affect governor stability. Compensation must be properly adjusted to the particular engine and load to provide stable operation.When the engine or turbine is started for the first time after the governor has been filled with oil, the governor may be stable at constant speed, yet the governor may need adjustment. High overspeeds and underspeeds after load changes and slow return to normal speed indicate the need for compensation adjustment. Maximum compensation settings generally provide stable steady state operation but result in greater off-speeds on load changes.