Fault one: drum mixer noise

原因分析：小型混凝土搅拌机滚筒内部噪声严重的原因有二，一是滚筒内混合物掺杂异物，因碰撞或剧烈摩擦产生噪声；二是轴承损坏，转动时由于接合处摩擦加剧产生噪声。在搅拌机工作过程中，一旦有异物落入滚筒式搅拌机滚筒内，将影响滚筒搅拌机正常作业，影响混凝土搅拌均匀，并且对小型滚筒搅拌机滚筒存在伤害，严重时可能造成滚筒搅拌机滚筒损坏或报废。

Cause analysis: there are two reasons for the serious noise in the drum of small concrete mixer. One is that the mixture in the drum is mixed with foreign matter, and the noise is produced by collision or severe friction; Second, the bearing is damaged, and the noise is produced due to the friction at the joint. In the working process of the mixer, once foreign matters fall into the drum of the drum mixer, it will affect the normal operation of the drum mixer, affect the uniformity of concrete mixing, and damage the drum of the small drum mixer. If it is serious, it may cause damage to the drum of the drum mixer or report waste.

排除方法：小型滚筒搅拌机滚筒内部有异物时，需停机检查异物，修理或更换其中损坏的零部件。若轴承损坏，其结合处摩擦加剧，轴承运动会受到影响并产生很大噪声。此时，产生的噪声往往呈周期性，因为轴承是匀速旋转的，当转到损坏部位时就会产生噪声，所以这时的噪声会有一定的频率。若是轴承损坏，则需换新的轴承。

Troubleshooting: when there are foreign matters inside the drum of small drum mixer, stop the machine to check and remove the foreign matters, and repair or replace the damaged parts. If the bearing is damaged, the friction at the joint will intensify, and the bearing motion will be affected and produce a lot of noise. At this time, the noise is often periodic, because the bearing is rotating at a constant speed, when it turns to the damaged part, it will produce noise, so the noise will have a certain frequency. If the bearing is damaged, replace it with a new one.

故障二：小型搅拌机不适合长时间连续作业，会导致电机温度过高。

Fault 2: the small mixer is not suitable for long-time continuous operation, which will cause the motor temperature to be too high.

原因分析：小型滚筒搅拌机长时间作业会导致小型搅拌机电机作业负荷增大，导致电机温度升高。电机温度升高使得，内部电源线超负载作业，接线部位或者电容等易损零部件烧毁，导致电机出现问题；大部分正规小型搅拌机电机部位都安装限制器，一旦电机过热，会自动控制断电，保护电机不受到伤害。排除方法：禁止长时间连续作业，连续作业时间尽量不超过2小时；购买正规产品，带有保护装置电机。

Cause analysis: long time operation of small drum mixer will lead to the increase of motor working load and motor temperature. The temperature rise of the motor causes the overload operation of the internal power line, and the wiring parts or capacitors and other vulnerable parts are burned, which leads to the problems of the motor; Most regular small mixer motor parts are installed with limiter, once the motor overheats, it will automatically control the power off to protect the motor from damage. Exclusion method: long time continuous operation is forbidden, and the continuous operation time shall not exceed 2 hours as far as possible; Buy regular products, with protection device motor.

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