根據(jù)多年經(jīng)驗總結，羅茨鼓風機長時間使用可能出現(xiàn)故障的常見原因主要包括斷軸、軸承損壞、機組振動大、轉子卡死、軸封泄漏等等。

　　Based on years of experience, the common causes of possible malfunctions in Roots blowers after prolonged use include shaft breakage, bearing damage, high unit vibration, rotor jamming, shaft seal leakage, and so on.

　　1、羅茨鼓風機故障原因分析

　　1. Analysis of the causes of Roots blower malfunction

　　轉子與機殼或轉子間摩擦是羅茨鼓風機的常見問題，若在運轉中顯示此問題，可能有著比較嚴重的機械振動與噪音。羅茨鼓風機經(jīng)過較長時間停機后，頻頻出現(xiàn)葉輪卡澀的現(xiàn)象，錦工風機把問題的主要原因梳理為以下幾大類。

　　Friction between the rotor and the casing or between the rotors is a common issue with Roots blowers. If this problem is displayed during operation, it may result in severe mechanical vibration and noise. After a long period of shutdown, the Roots blower frequently experiences impeller jamming. Jinggong Fan has classified the main causes of the problem into the following categories.

　　(1)轉子分葉、合葉間隙有問題

　　(1) There is a problem with the clearance between rotor blades and blades

　　轉子的分葉、合葉間隙有問題，運轉中分葉、合葉間隙發(fā)生改變。兩轉子在低速轉動的時候會出現(xiàn)撞擊，導致轉子間摩擦甚至卡阻。

　　There is a problem with the clearance between the rotor blades, which changes during operation. When the two rotors rotate at low speeds, they may collide, causing friction and even jamming between the rotors.

　　一旦運轉中出現(xiàn)此機械故障，會使兩轉子間或轉子與機殼出現(xiàn)撞擊，發(fā)出強力的撞擊聲；產(chǎn)生振動變大，甚至能引起基礎產(chǎn)生振動；同時摩擦部位溫度在短時間內(nèi)升高，甚至出現(xiàn)機殼發(fā)熱燒紅現(xiàn)象。

　　Once this mechanical failure occurs during operation, it will cause a strong impact sound between the two rotors or between the rotor and the casing; Generate increased vibration, and even cause vibration in the foundation; At the same time, the temperature of the friction area rises in a short period of time, and even the casing heats up and burns red.

　　(2)軸承損壞

　　(2) Bearing damage

　　風機運行工況差、油封損壞、裝配間隙超標等都會導致軸承損壞，而軸承損壞會造成溫度升高，軸承座溫度也會增加，嚴重時會使軸承座變形。

　　Poor operating conditions of the fan, damage to the oil seal, and excessive assembly clearance can all lead to bearing damage. Bearing damage can cause an increase in temperature, and the temperature of the bearing seat can also increase. In severe cases, it can cause deformation of the bearing seat.

　　特別是軸承內(nèi)外圈抱死時，軸承座與側蓋板受到較大的額外力，溫度也會很高，軸承座與側蓋板受熱不均，嚴重時造成側蓋板變形，出現(xiàn)裂紋。

　　Especially when the inner and outer rings of the bearing are locked, the bearing seat and side cover plate are subjected to significant external forces, and the temperature is also high. The uneven heating of the bearing seat and side cover plate can cause deformation and cracking of the side cover plate in severe cases.

　　軸徑磨損，使軸與軸承內(nèi)圈間隙過大，軸承座磨損使軸承座與軸承外圈間隙過大，都會造成轉子卡澀或摩擦。特別是皮帶連接的風機，主動軸由于受皮帶拉力的作用，致使軸承座單向受力較大，容易出現(xiàn)皮帶側主動軸的軸承座單邊磨損。

　　Wear of the shaft diameter can cause excessive clearance between the shaft and the inner ring of the bearing, and wear of the bearing seat can cause excessive clearance between the bearing seat and the outer ring of the bearing, both of which can cause rotor jamming or friction. Especially for fans connected by belts, the active shaft is subjected to significant unidirectional force on the bearing seat due to the tension of the belt, which can lead to unilateral wear of the bearing seat on the belt side of the active shaft.

　　(3)齒輪磨損

　　(3) Gear wear

　　齒輪磨損，齒輪側間隙增大，將造成兩轉子位置發(fā)生變化，使主動轉子與從動轉子之間合葉間隙變小、分葉間隙增大，引起兩轉子互相碰撞、摩擦。

　　Gear wear and increased clearance on the gear side will cause a change in the position of the two rotors, resulting in a decrease in the clearance between the active rotor and the driven rotor and an increase in the clearance between the blades, causing the two rotors to collide and rub against each other.

　　2、羅茨鼓風機故障處理方式

　　2. Troubleshooting methods for Roots blower

　　(1)調(diào)節(jié)分合葉間隙

　　(1) Adjust the gap between the splitting and folding blades

　　用塞尺檢查轉子分、合葉間隙值，使其在標準范圍內(nèi)。檢查調(diào)節(jié)間隙的背帽與螺栓，保證其完好性。

　　Use a feeler gauge to check the clearance value between the rotor and the blade, ensuring it is within the standard range. Check the back cap and bolts that adjust the gap to ensure their integrity.

　　要求：分葉間隙占總間隙的1/3，但不小于0.15mm；合葉間隙占總間隙的2/3，且要大于齒輪側隙1.5倍。

　　Requirement: The blade clearance accounts for one-third of the total clearance, but not less than 0.15mm; the blade clearance accounts for two-thirds of the total clearance, and must be greater than 1.5 times the gear side clearance.

　　合葉為主動轉子的嚙合面向被動轉子有靠近的趨勢；分葉為主動轉子的嚙合面向被動轉子有遠離的趨勢。若轉子分、合葉間隙不合適，可調(diào)整齒套與輪轂或齒輪與軸的周向相對角度。

　　The meshing surface of the active rotor tends to approach the passive rotor; The meshing surface of the active rotor tends to move away from the passive rotor. If the clearance between the rotor blades is not suitable, the circumferential relative angle between the gear sleeve and the hub or between the gear and the shaft can be adjusted.

　　轉子分葉、合葉的調(diào)整是羅茨鼓風機檢修的關鍵部分，直接決定著檢修質(zhì)量的好壞。不同類型的羅茨鼓風機，有不同的調(diào)節(jié)形式。軸與齒輪為錐型無鍵連接時，一般通過調(diào)節(jié)軸與齒輪周向相對位置；軸與齒輪為鍵連接時，一般通過調(diào)節(jié)從動齒輪與輪轂的相對位置。

　　The adjustment of rotor blade splitting and merging is a key part of the maintenance of Roots blower, which directly determines the quality of maintenance. Different types of Roots blowers have different adjustment forms. When the shaft and gear are connected in a tapered keyless manner, the relative position of the shaft and gear in the circumferential direction is generally adjusted; When the shaft is connected to the gear as a key, it is generally achieved by adjusting the relative position between the driven gear and the wheel hub.

　　風機正常運轉過程中，隨著齒輪磨損，間隙都會地發(fā)生變化，其中合葉間隙趨向減小，分葉間隙趨向增大。在調(diào)整兩葉輪的工作間隙時，應預先將合葉間隙適當調(diào)大，一般合葉間隙是分葉間隙的2倍。

　　During the normal operation of the fan, as the gears wear, the clearance will change, with the closing clearance tending to decrease and the splitting clearance tending to increase. When adjusting the working clearance of the two impellers, the clearance between the blades should be appropriately increased in advance. Generally, the clearance between the blades is twice that of the clearance between the blades.

　　葉輪間隙調(diào)整時，首先將葉片轉到與水平方向呈45°的位置，此時兩葉輪的間隙即為分葉或合葉間隙。

　　When adjusting the clearance between the impellers, first rotate the blades to a position at a 45 ° angle to the horizontal direction. At this point, the clearance between the two impellers is the split or combined clearance.

　　現(xiàn)場調(diào)節(jié)時，一般用同樣厚度的塞尺固定在兩轉子間，并將兩轉子固定，再裝入主動齒輪，并將從動齒輪的標記對準主動齒的標記壓入軸上，依次裝上齒輪擋圈，止動墊圈和緊固螺帽。調(diào)整好后再用塞尺測量分葉間隙與合葉間隙的實際大小，如不合適重新調(diào)整，直到符合標準。

　　When adjusting on site, a feeler gauge of the same thickness is generally used to fix between the two rotors, and the two rotors are fixed. Then, the driving gear is installed, and the mark of the driven gear is aligned with the mark of the driving gear and pressed onto the shaft. The gear retaining ring, stop washer, and fastening nut are installed in sequence. After adjustment, use a feeler gauge to measure the actual size of the clearance between the dividing and closing blades. If it is not suitable, readjust it until it meets the standard.

　　(2)更換軸承

　　(2) Replace bearings

　　檢查側蓋板是否變形有裂紋。變形不嚴重，可打磨高點；變形嚴重則更換側蓋板；如有裂紋，可進行補焊。

　　Check if the side cover plate is deformed or cracked. The deformation is not severe and can be polished to a higher point; If the deformation is severe, replace the side cover plate; If there are cracks, they can be repaired by welding.

　　檢查軸承座與軸徑是否磨損。如果軸磨損，一般進行補焊；如果軸承座磨損，單獨的軸承座一般更換新件，不進行修理；軸承座與側蓋板為一體時，則補焊軸承座，使其配合間隙達到技術要求。

　　Check if the bearing seat and shaft diameter are worn. If the shaft is worn, it is generally repaired by welding; If the bearing seat is worn, the individual bearing seat is generally replaced with a new part without repair; When the bearing seat is integrated with the side cover plate, the bearing seat should be welded to meet the technical requirements for the fitting clearance.

　　(3)檢查齒側間隙，更換齒輪

　　(3) Check the tooth clearance and replace the gear

　　用紅丹粉檢查齒輪嚙合部位的接觸面積。檢查齒側間隙的方法有打表法、塞尺法、壓鉛絲法。

　　Check the contact area of the gear meshing part with red lead powder. The methods for checking the tooth flank clearance include marking method, feeler gauge method, and lead wire pressing method.

　　標準要求：側隙0.10~0.18mm、嚙合部位在齒面中部，齒表接觸面積沿齒高方向不小于50%，沿齒寬方向不小于70%。若檢測結果不符合要求，需更換齒輪。

　　Standard requirements: Side clearance of 0.10~0.18mm, meshing position in the middle of the tooth surface, tooth surface contact area not less than 50% along the tooth height direction, and not less than 70% along the tooth width direction. If the test results do not meet the requirements, the gear needs to be replaced.

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