答：罗茨风机齿轮拆卸难点在于同步齿轮，该齿轮为直齿啮合，主动轮齿轮用液压拉马拉出，从动齿轮用自身6个M20螺栓孔加顶杆顶出。轴承座用顶杆顶出，注意顶杆要受力均匀，否则会损坏轴承座，加装时先拆后装，后拆先装，注意各部分间隙即可。

　　罗茨风机齿轮在拆卸之前，我们首先要确定齿轮与轴的配合方式，有的是锥度配合，有的是过盈配合，有的是圆柱配合，还有的是采用其他的配合方式，首先了解其配合方式是，拆卸的首要步骤。例如：艾珍GM系列，普通拉马不行，要用专用液压拉马，轴上有油槽的!

　　其次是记录，记录是很重要的工作，尤其是对不熟悉罗茨鼓风机的人员来说，在拆卸时做好记录非常重要，在后面组装时，能够有效的避免各种错误。

　　凡使用过的旧齿轮，应根据拆卸时所作的方位标记，按照原来的磨痕进行装配，以避免齿面啮合不良。如果换用新的齿轮，应对主、从动轮同时进行更换。否则，新旧齿轮配对，势必造成接触不良操作时，一般先安装主动齿轮，后装从动齿轮。在齿轮与轴采用平键连接的，先把平键装在轴上，并在键的侧面涂上二硫化钼或高黏度机油，然后把齿轮轴孔与轴相对，使孔上的键槽对准平键，把齿轮安装到轴上。常用的安装方法为下述两种。

　　当齿轮与轴采用的锥度配合时，先把主动齿轮套在主动轴上，在齿轮锁紧部位装上圆螺母，然后用铜棒敲打齿轮端面，旋紧圆螺母。待其充分锁紧之后，将圆螺母退下，加入止推垫圈，正式锁紧。接着将从动齿轮套到从动轮上，按规定的运转方向盘旋转子，检查两叶轮间的间隙。并通过改变从动齿圈与轮毂之间的周向位置，对叶轮方位进行调整。确认叶轮间隙符合要求之后，将从动齿轮锁紧。

　　如果是圆柱配合，由于配合较紧，需要使用较大的压力才能把齿轮装到轴上。通常将金属套筒顶在齿轮端面上，然后用手锤打击套筒，或者用铜棒直接敲打齿轮端面，将齿轮往轴上推进，在齿轮顶到轴肩之后将其锁紧。

　　罗茨风机齿轮拆卸注意事项：

　　罗茨鼓风机结构形式不同，其拆卸方法有所不同，但是，在罗茨风机拆卸之前，应注意以下几点：

　　1，拆卸前，应测量被拆卸部件相互之间的装配间隙，对于关键另部件的装配位置，应做好记录，如罗茨风机的同步齿轮，以免回装时发生错误。

　　2，拆卸下来的结合面垫子以及调整垫片，应妥善保管，其装配位置，作好

　　记录，应并测量其厚度。

　　3，一些装配精度很高的组件，如鼓风机同步齿轮的轮和齿圈，如果齿圈未发现损伤不要轻易拆开螺栓打出销子，因为此装配精度直接影响罗茨风机各部位的间隙。

　　4，不同的零件，要选择适当的工具来进行拆卸以免损坏零件，影响装配质量，甚至造成罗茨风机不能正常运行。

　　一般来说，能够操作罗茨风机齿轮拆装的人员，都是具备一定专业知识和技术的人员，因为每个厂家生产的罗茨鼓风机都存在一定的差异，所以，在操作时，一定要谨慎操作，如果自己不能拆下齿轮，可以直接将旧风机返回厂家，让厂家帮我们进行处理，齿轮更换完之后，还需要对间隙进行调整，这也是非常重要的工作，齿轮间隙不能太小，也不能太大，必须在误差范围内才可。

       以上关于【罗茨风机维修时齿轮拆卸不下来怎么办】由罗茨风机厂家上海瑞柘环保原创，如需转载，请注明来源！

　　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.