PROSOFT MVI56-BAS 可編程應(yīng)用
檢查針閥的設(shè)置和補(bǔ)償調(diào)整（見(jiàn)第4章，補(bǔ)償調(diào)整）。5.在工作溫度下，檢查機(jī)油是否清潔，油位是否正確。液壓調(diào)速器的大多數(shù)故障源于臟油。砂礫和其他雜質(zhì)可能會(huì)隨油一起進(jìn)入調(diào)速器，或者在油開(kāi)始分解（氧化）或變得粘稠時(shí)形成。內(nèi)部運(yùn)動(dòng)部件由裝置內(nèi)的油持續(xù)潤(rùn)滑。由于油中的砂礫和雜質(zhì)，閥門、活塞和柱塞會(huì)粘在孔中，甚至“凍結(jié)”。如果是這種情況，可以通過(guò)用燃油或煤油沖洗裝置來(lái)糾正不穩(wěn)定的操作和不良響應(yīng)（如果磨損不嚴(yán)重）。不建議使用商用溶劑，因?yàn)樗鼈兛赡軙?huì)損壞密封件或墊圈。如有可能，每年更換機(jī)油并沖洗調(diào)速器兩次。要更換機(jī)油，請(qǐng)拆下放油塞并排出舊機(jī)油，向調(diào)速器加注燃油以沖洗調(diào)速器，在原動(dòng)機(jī)低速運(yùn)行的情況下，打開(kāi)針閥使調(diào)速器循環(huán)兩到三圈。
即使補(bǔ)償可能已經(jīng)在工廠或調(diào)速器測(cè)試設(shè)備上預(yù)先調(diào)整過(guò)。盡管調(diào)速器的運(yùn)行可能令人滿意，因?yàn)闄C(jī)組在無(wú)負(fù)載的情況下以恒定速度運(yùn)行，但調(diào)速器仍可能無(wú)法根據(jù)其控制的負(fù)載和發(fā)動(dòng)機(jī)進(jìn)行正確調(diào)整。負(fù)載變化或速度設(shè)定值變化后，高過(guò)速和低欠速，或恢復(fù)速度緩慢，都是補(bǔ)償調(diào)節(jié)和針閥設(shè)定值不正確的結(jié)果。定義使用以下頁(yè)面上的故障排除圖表（表5-2）來(lái)確定故障操作的可能原因并糾正這些故障。圖表中使用的術(shù)語(yǔ)定義如下：Hunt速度的有節(jié)奏的變化，可能源于調(diào)速器或原動(dòng)機(jī)。（有關(guān)故障排除信息，請(qǐng)參見(jiàn)表5-2第1A段。）尋道的頻率通常小于50 Hz/min。喘振以周期性間隔發(fā)生的速度突然變化，也可能源于調(diào)速器或原動(dòng)機(jī)。（故障排除信息見(jiàn)表5-2第1A段。）調(diào)速器輸出軸和燃油連桿的抖動(dòng)A高頻振動(dòng)。不要將其與調(diào)速器的正?？刂苿?dòng)作混淆。抖動(dòng)的頻率超過(guò)50赫茲/分鐘。初步檢查調(diào)速器故障通常表現(xiàn)在原動(dòng)機(jī)的速度變化中，但不一定是調(diào)速器引起的。當(dāng)出現(xiàn)不適當(dāng)?shù)乃俣茸兓瘯r(shí)，應(yīng)執(zhí)行以下步驟：1。檢查負(fù)載，確保速度變化不是超出原動(dòng)機(jī)容量的負(fù)載變化的結(jié)果。2.檢查發(fā)動(dòng)機(jī)工作情況，確保所有氣缸都正常點(diǎn)火，噴油器處于良好的工作狀態(tài)并正確校準(zhǔn)。3.檢查調(diào)速器與燃油齒條或閥門之間的聯(lián)動(dòng)裝置。決不能有束縛或空轉(zhuǎn)。
There must be no binding or lost motion. 4. Check the setting of the needle valve and compensation adjustment (see Chapter 4, Compensation Adjustments). 5. Check that the oil is clean and oil level is correct at operating temperature. The source of most troubles in any hydraulic governor stems from dirty oil. Grit and other impurities can be introduced into the governor with the oil, or form when the oil begins to break down (oxidize) or becomes sludgy. The internal moving parts are continually lubricated by the oil within the unit. Valves, pistons, and plungers will stick and even “freeze” in their bores due to grit and impurities In the oil. If this is the case, erratic operation and poor response can be corrected (if wear is not excessive) by flushing the unit with fuel oil or kerosene. The use of commercial solvents is not recommended as they may damage seals or gaskets. Change the oil and flush the governor twice a year if possible. To change oil, remove the drain plug and drain out the old oil, Flush the governor by filling it with fuel oil and, with the prime mover running at low speed, cycle the governor by opening the needle valve two or three turns.
Jiggle A high frequency vibration of the governor output shaft and fuel linkage. Do not confuse this with the normal, controlling action of the governor. A jiggle has a frequency of more than 50 Hz/min. Preliminary Inspection Governor troubles are usually revealed in speed variations of the prime mover, but it does not necessarily follow that such variations are caused by the governor. When improper speed variations appear, the following procedure should be performed: 1. Check the load to be sure the speed changes are not the result of load changes beyond the capacity of the prime mover. 2. Check engine operation to be sure all cylinders are firing properly and that the fuel injectors are in good operating condition and properly calibrated. 3. Check the linkage between the governor and fuel racks or valve.
even though the compensation may have been previously adjusted at the factory or on governor test equipment. Although the governor may appear to be operating satisfactorily because the unit runs at constant speed without load, the governor still may not be correctly adjusted to the load and to the engine it Is to control. High overspeeds and low underspeeds, or slow return to speed after a load change or speed setting change are some of the results of an incorrect setting of the compensating adjustment and needle valve. Definitions Use the troubleshooting chart (Table 5-2) on the following pages to determine the probable causes of faulty operation and to correct these troubles.Terms used in the chart are defined as follows: Hunt A rhythmic variation of speed which can originate in the governor or in the prime mover. (See Table 5-2, Paragraph 1A, for troubleshooting information.) A hunt usually has a frequency of less than 50 Hz/min. Surge A sudden variation of speed occurring at periodic Intervals which can also originate in the governor or in the prime mover. (See Table 5-2, Paragraph 1A, for troubleshooting information.)