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空压机联轴器的装配方法你知道吗?
Time:2019-05-31 11:07:24       来源:/      

  联轴器是将两根或两根轴与旋转部件连接起来,在传递运动和动力的过程中一起转动,在正常情况下不发生失谐的装置。有时也作为一种安全装置,防止连接部件承受过大的载荷,起到过载保护的作用。
  Coupling is a device which connects two or two axes with rotating parts and rotates together in the process of transferring motion and power without detuning under normal circumstances. Sometimes it is also used as a safety device to prevent the connecting parts from bearing excessive load and play the role of overload protection.
  耦合装配要求
  Coupled assembly requirements
  联轴器一般是刚性和挠性的。刚性联轴器要求连接轴两侧同轴度和旋转精度高,且轴向不应相互干扰。装配前检查配件尺寸是否合适,尽量用冲压而不是攻丝来装配单侧零件,然后将其连接在一起。对于柔性联轴器,允许较大的误差(包括轴偏心、角度和轴向位置),但必须在所选联轴器的补偿能力范围内。
  Coupling is generally rigid and flexible. Rigid coupling requires high coaxiality and rotation accuracy on both sides of the connecting shaft, and the axial direction should not interfere with each other. Check the fittings size before assembly, try to use stamping instead of tapping to assemble unilateral parts, and then connect them together. For flexible coupling, larger errors (including eccentricity, angle and axial position) are allowed, but they must be within the compensation capacity of the selected coupling.
  找到它的方法
  How to find it
  耦合正时主要测量同轴度(径向位移或径向间隙)和平行度(角位移或轴向间隙)。根据测量工具的不同,有四种方法。
  Coupled timing mainly measures coaxiality (radial displacement or radial clearance) and parallelism (angular displacement or axial clearance). According to the different measuring tools, there are four methods.
  1. 用直尺测量联轴器的同轴度(径向位移),用平面规和楔隙规测量联轴器的平行度(角位移)。该方法简单,应用广泛,但精度不高。如图所示:
  1. The coaxiality (radial displacement) of the coupling is measured by a ruler, and the parallelism (angular displacement) of the coupling is measured by a planar gauge and a wedge gauge. This method is simple and widely used, but its accuracy is not high. As shown in the figure:
  2. 用千分表、塞尺和中心卡直接测量联轴器的同轴度和平行度。调整方法:通常在垂直方向上加减电机(电机)垫片的脚或在水平方向上移动电机的位置来实现。
  2. Measure coaxiality and parallelism of coupling directly with micrometer, plug ruler and center card. Adjustment method: usually add or subtract the foot of the motor (motor) gasket in the vertical direction or move the motor position in the horizontal direction to achieve.
  轴上联轴器的装配方法
  Assembly Method of Shaft Coupling
  轴上联轴器的装配是联轴器安装的关键之一。联轴器与轴大多为干涉配合,连接方式分为键连接和无键连接,联轴器轴孔分为圆柱轴孔和圆锥轴孔两种形式。装配方法包括静态压入法、动态压入法、温差装配法和液压装配法。
  The assembly of the shaft coupling is one of the key points in the installation of the coupling. Most of the coupling and shaft are interference fit. The connection mode is divided into key connection and keyless connection. The shaft hole of coupling is divided into two forms: cylindrical shaft hole and conical shaft hole. Assembly methods include static pressing method, dynamic pressing method, temperature difference assembly method and hydraulic assembly method.
  静态压实
  Static compaction
  这种方法是根据装配所需要的力的大小,采用夹具、千斤顶、手动或电机压机,静压法一般用于锥形轴孔。由于静压法的局限性,在干扰较大时,难以施加较大的力。同时,在冲压过程中,联轴器与轴之间的配合面微凸峰会被切断,配合面会受到损伤。因此,很少使用这种方法。
  This method uses fixture, jack, manual or motor press according to the force required for assembly. Static pressure method is generally used for conical shaft holes. Because of the limitation of hydrostatic method, it is difficult to exert a greater force when the disturbance is large. At the same time, in the stamping process, the slightly convex summit of the mating surface between the coupling and the shaft is cut off, and the mating surface will be damaged. Therefore, this method is seldom used.
  动态压缩
  Dynamic compression
  这种方法是指利用冲击工具或机械完成装配过程,一般用于联轴器与轴之间的配合是过渡配合或干涉不大的场合。在装配现场,这种方法通常用手锤敲击。该方法是将木块或其他软材料垫在轮毂端面作为缓冲部件,依靠手锤的冲击力将联轴器敲入。该方法不适用于铸铁、淬硬钢、铸造合金等脆性材料耦合的局部损伤。这种方法也破坏配合面,常用于低速小联轴器的装配。
  This method refers to the use of impact tools or machinery to complete the assembly process. It is generally used in conjunction between coupling and shaft where there is little transition or interference. On the assembly site, this method is usually hammered. In this method, wood blocks or other soft materials are cushioned on the hub end as a buffer component, and the coupling is knocked in by the impact force of the hammer. This method is not suitable for local damage caused by coupling of brittle materials such as cast iron, hardened steel and cast alloy. This method also destroys the mating surface and is often used for assembling low-speed small couplings.
  温差组装
  Temperature difference assembly
                         济南空压机
  通过加热使联轴器膨胀,或通过冷却使轴端收缩,从而使车轮联轴器可以很容易地安装到轴上。与静态压入法和动态压入法相比,该方法具有许多优点,非常适用于脆性材料车轮采用温差装配法。
  Wheel coupling can be easily mounted on the axle by expanding the coupling by heating or contracting the axle end by cooling. Compared with static pressing method and dynamic pressing method, this method has many advantages, and is very suitable for brittle material wheels using temperature difference assembly method.
  温差装配法多采用加热法,冷却法很少采用。加热方法有多种,有的将轮毂放入具有高闪点的油中进行油浴加热或焊枪烘烤,有的使用烘箱加热,装配现场主要采用油浴加热和焊枪烘烤。油浴加热达到的最高温度取决于油的性质,一般在200℃以下。当采用其他方法对轮毂加热时,联轴器的温度可以高于200℃,但从金相和热处理角度来看,联轴器的温度不能任意升高,钢的再结晶温度为430℃。如果加热温度超过430℃,会引起钢的内部结构发生变化,所以加热温度的上限必须小于430℃。保险起见,加热温度上限应在400℃以下。对于联轴器的实际加热温度,可以根据联轴器与轴的干涉值以及联轴器在加热后对轴的配合要求来计算。
  Temperature difference assembly method mostly uses heating method, but cooling method seldom uses. There are many heating methods, some put the hub into oil with high flash point for oil bath heating or welding torch baking, some use oven heating, assembly site mainly uses oil bath heating and welding torch baking. The highest temperature reached by oil bath heating depends on the nature of oil, generally below 200 C. When the hub is heated by other methods, the temperature of the coupling can be higher than 200 C, but from the point of view of metallography and heat treatment, the temperature of the coupling can not be arbitrarily increased, and the recrystallization temperature of steel is 430 C. If the heating temperature exceeds 430 C, the internal structure of the steel will change, so the upper limit of the heating temperature must be less than 430 C. For safety, the upper limit of heating temperature should be below 400 C. For the actual heating temperature of the coupling, it can be calculated according to the interference value between the coupling and the shaft and the matching requirement of the coupling after heating.
  组装后的检查
  Inspection after assembly
  联轴器安装在轴上后,应仔细检查联轴器与轴的垂直度和同轴度。一般在联轴器端面和外圆处设置两个千分表。转动轴时,观察联轴器的全跳动(包括端跳动和径向跳动),确定联轴器和轴的准确性和同轴度。不同的速度和联轴器类型需要不同的全跳动值。联轴器安装在轴上后,全跳动的偏差值必须在设计要求的公差范围内,这是联轴器装配的主要质量要求之一。
  After the coupling is installed on the shaft, the verticality and coaxiality of the coupling and the shaft should be carefully checked. Generally, two micrometers are set at the end face and the outer circle of the coupling. When the shaft is rotated, the full runout (including end runout and radial runout) of the coupling is observed to determine the accuracy and coaxiality of the coupling and the shaft. Different speeds and coupling types require different full runout values. After the coupling is installed on the shaft, the deviation value of the full run-out must be within the tolerance range of the design requirements, which is one of the main quality requirements of the coupling assembly.
  耦合的全部跳动值不满足要求的原因有很多。对于现场装配,由于键装配不当,联轴器不是同轴的。正确安装钥匙应使钥匙的两侧与键槽的墙面紧密贴合,一般在装配时用上色方法进行检查,不能与锉刀或铲刀配合得很好,使其符合要求。在键的顶部有一个间隙,大约0.1-0.2mm。
  There are many reasons why all the jump values of the coupling do not meet the requirements. For field assembly, the coupling is not coaxial due to improper key assembly. Correct installation of keys should make the two sides of keys and keyway walls closely adhere to each other. Generally, when assembling, the key should be checked by coloring method. It can not match the file or spade very well, so that it meets the requirements. There is a gap at the top of the key, about 0.1-0.2 mm.
  高速旋转机械对联轴器与轴之间的同轴度要求较高。单键连接不能实现高同轴度。双键连接或样条连接均能提高同轴度。
  High-speed rotating machinery requires high coaxiality between coupling and shaft. Single-key connection can not achieve high coaxiality. Double bond or spline connection can improve coaxiality.
  您有任何不同意见,欢迎留言交流!
  You have any different opinions, please leave a message to exchange!
 

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