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How Do We Do With The Top Teeth And The Dedendum Meshing Traces Heavy?
Sep 12, 2018

   Efficient solutions to the problems encountered in the installation of reducer can guarantee the service life of the Starred-River reducer. Today we mainly talk about how to solve the problem of heavy meshing marks on the top and root of Starred-River reducer. As shown in Fig. 1, the coarse part shows the meshing marks.


                                                                                                 Fig 1

   Cause: the center distance is small.

   Phenomenon: the gear pair has small side clearance, large rotation resistance, large vibration and noise.

   Solution: pull the center distance.

   If two gears are mounted in a non-detachable box, the center distance is enlarged by adding adjusting pads in the gear mounting support bearing housing; as shown in Figure 2, the thickened portion of the diagram indicates the position of the adjusting pads in the bearing housing. If the two gears are mounted in the detachable two cases, the center distance can be enlarged by adding adjusting pads on the joint surface of the two cases. As shown in Figure 3, the adjustment pad 1 shows the position of the adjustment pad on the joint surface between the two cases, and the adjustment pad 2 represents a method of adjusting the center distance under the upper gear mounting bearing seat.

   Usually we use the "adjusting pad 1" method, because there may be other gears installed in the box 2, if we use the "adjusting pad 2" method, it will cause other problems such as reducing the center distance and readjusting the bearing clearance. Detection after adjustment: Set up the adjustment pad, re-install the gear, through the color method to preliminary judge the center distance size, if the situation in Figure 1 disappeared and easy to rotate, and then test the backlash of the gear pair with the lead wire method to determine whether the center distance is appropriate. The gear backlash detection standard is shown in Table 1.

Center distance /mm


     320-500     500-800    800-1250   1250-2000  2000-3150
Side gap/μm        210        260        340         420        530        710

                                                                                                      Table 1

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