答：羅茨風機齒輪拆卸難點在于同步齒輪，該齒輪為直齒嚙合，主動輪齒輪用液壓拉馬拉出，從動齒輪用自身6個M20螺栓孔加頂桿頂出。軸承座用頂桿頂出，注意頂桿要受力均勻，否則會損壞軸承座，加裝時先拆后裝，后拆先裝，注意各部分間隙即可。

　　羅茨風機齒輪在拆卸之前，我們首先要確定齒輪與軸的配合方式，有的是錐度配合，有的是過盈配合，有的是圓柱配合，還有的是采用其他的配合方式，首先了解其配合方式是，拆卸的首要步驟。例如：艾珍GM系列，普通拉馬不行，要用專用液壓拉馬，軸上有油槽的!

　　其次是記錄，記錄是很重要的工作，尤其是對不熟悉羅茨鼓風機的人員來說，在拆卸時做好記錄非常重要，在后面組裝時，能夠有效的避免各種錯誤。

　　凡使用過的舊齒輪，應根據拆卸時所作的方位標記，按照原來的磨痕進行裝配，以避免齒面嚙合不良。如果換用新的齒輪，應對主、從動輪同時進行更換。否則，新舊齒輪配對，勢必造成接觸不良操作時，一般先安裝主動齒輪，后裝從動齒輪。在齒輪與軸采用平鍵連接的，先把平鍵裝在軸上，并在鍵的側面涂上二硫化鉬或高黏度機油，然后把齒輪軸孔與軸相對，使孔上的鍵槽對準平鍵，把齒輪安裝到軸上。常用的安裝方法為下述兩種。

　　當齒輪與軸采用的錐度配合時，先把主動齒輪套在主動軸上，在齒輪鎖緊部位裝上圓螺母，然后用銅棒敲打齒輪端面，旋緊圓螺母。待其充分鎖緊之后，將圓螺母退下，加入止推墊圈，正式鎖緊。接著將從動齒輪套到從動輪上，按規定的運轉方向盤旋轉子，檢查兩葉輪間的間隙。并通過改變從動齒圈與輪轂之間的周向位置，對葉輪方位進行調整。確認葉輪間隙符合要求之后，將從動齒輪鎖緊。

　　如果是圓柱配合，由于配合較緊，需要使用較大的壓力才能把齒輪裝到軸上。通常將金屬套筒頂在齒輪端面上，然后用手錘打擊套筒，或者用銅棒直接敲打齒輪端面，將齒輪往軸上推進，在齒輪頂到軸肩之后將其鎖緊。

　　羅茨風機齒輪拆卸注意事項：

　　羅茨鼓風機結構形式不同，其拆卸方法有所不同，但是，在羅茨風機拆卸之前，應注意以下幾點：

　　1，拆卸前，應測量被拆卸部件相互之間的裝配間隙，對于關鍵另部件的裝配位置，應做好記錄，如羅茨風機的同步齒輪，以免回裝時發生錯誤。

　　2，拆卸下來的結合面墊子以及調整墊片，應妥善保管，其裝配位置，作好

　　記錄，應并測量其厚度。

　　3，一些裝配精度很高的組件，如鼓風機同步齒輪的輪和齒圈，如果齒圈未發現損傷不要輕易拆開螺栓打出銷子，因為此裝配精度直接影響羅茨風機各部位的間隙。

　　4，不同的零件，要選擇適當的工具來進行拆卸以免損壞零件，影響裝配質量，甚至造成羅茨風機不能正常運行。

　　一般來說，能夠操作羅茨風機齒輪拆裝的人員，都是具備一定專業知識和技術的人員，因為每個廠家生產的羅茨鼓風機都存在一定的差異，所以，在操作時，一定要謹慎操作，如果自己不能拆下齒輪，可以直接將舊風機返回廠家，讓廠家幫我們進行處理，齒輪更換完之后，還需要對間隙進行調整，這也是非常重要的工作，齒輪間隙不能太小，也不能太大，必須在誤差范圍內才可。

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　　Answer: the difficulty in disassembling roots blower gear lies in the synchronous gear, which is meshed with straight teeth. The driving gear is driven out by hydraulic Ramallah, and the driven gear is driven out by its own six M20 bolt holes and ejector rods. The bearing seat is pushed out with the ejector rod. Pay attention to that the ejector rod should be stressed evenly, otherwise the bearing seat will be damaged. When installing, remove it first and then install it. Pay attention to the clearance of each part.

　　Before disassembling the roots blower gear, we must first determine the fitting mode of the gear and the shaft, some are taper fitting, some are interference fitting, some are cylindrical fitting, and some are other fitting modes. First of all, understanding its fitting mode is the first step of disassembly. For example: AI Zhen GM series, ordinary pullers can't work. Special Hydraulic Pullers should be used. There are oil grooves on the shaft!

　　The second is recording, which is a very important work, especially for those who are not familiar with roots blower, it is very important to make a good record during disassembly, and various errors can be effectively avoided during later assembly.

　　All used old gears should be assembled according to the original wear marks according to the orientation marks made during disassembly, so as to avoid poor meshing of the tooth surface. If a new gear is used, the driving and driven wheels should be replaced at the same time. Otherwise, the matching of new and old gears will inevitably cause poor contact. When operating, generally, the driving gear is installed first, and then the driven gear. If the gear and shaft are connected by a flat key, first install the flat key on the shaft, and coat the side of the key with molybdenum disulfide or high viscosity engine oil, then put the gear shaft hole opposite to the shaft, align the keyway on the hole with the flat key, and install the gear on the shaft. The common installation methods are the following two.

　　When the gear fits with the taper of the shaft, first put the driving gear on the driving shaft, install the round nut on the locking part of the gear, and then tap the gear end face with a copper bar to tighten the round nut. After it is fully locked, withdraw the round nut, add the thrust washer, and formally lock it. Then put the driven gear on the driven gear, rotate the rotor according to the specified running direction, and check the gap between the two impellers. The impeller orientation is adjusted by changing the circumferential position between the driven gear ring and the hub. After confirming that the impeller clearance meets the requirements, lock the driven gear.

　　If it is a cylindrical fit, because the fit is tight, it requires a large pressure to install the gear on the shaft. Usually, push the metal sleeve on the end face of the gear, then hit the sleeve with a hammer, or directly hit the end face of the gear with a copper bar, push the gear onto the shaft, and lock it after the gear is pushed to the shaft shoulder.

　　Precautions for disassembly of Roots blower gear:

　　The roots blower has different structural forms, and its disassembly methods are different. However, before the disassembly of Roots blower, the following points should be paid attention to:

　　1. Before disassembly, measure the assembly clearance between the disassembled parts, and record the assembly position of other key parts, such as the synchronous gear of Roots blower, to avoid errors during reassembly.

　　2. The removed joint surface cushion and adjusting gasket should be properly kept, and their assembly positions should be well prepared

　　Record and measure its thickness.

　　3. For some components with high assembly accuracy, such as the wheel and ring gear of the synchronous gear of the blower, if the ring gear is not damaged, do not easily disassemble the bolts and knock out the pins, because this assembly accuracy directly affects the clearance of all parts of the roots blower.

　　4. For different parts, appropriate tools should be selected for disassembly to avoid damaging the parts, affecting the assembly quality, and even causing the roots blower to fail to operate normally.

　　Generally speaking, the personnel who can operate the disassembly and assembly of Roots blower gears are those who have certain professional knowledge and technology. Because there are certain differences in Roots blowers produced by each manufacturer, they must be careful in operation. If they cannot remove the gears themselves, they can directly return the old fans to the manufacturer and ask the manufacturer to help us deal with them. After the gears are replaced, the clearance needs to be adjusted, This is also a very important work. The gear clearance cannot be too small or too large. It must be within the error range.