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液压挖掘机反转展转支承的修复和陈设变乱

日期:2018-06-14   源头:http://www.degradedijital.com/
反转展转支承的修复
Repair of rotary support
要是互换新的反转展转支承需要入口,且价钱昂贵,约莫10万元左右,供货周期也相比长。挖掘机自身为旧呆板,没有必要互换新的反转展转支承,故决议对原反转展转支承举行修复。由于发现标题相比及时,反转展转支承的内、外滚道粉碎并不十分告急。颠末观察和丈量,反转展转支承的内、外滚道变形,只是滚道有麻点,仍可延续运用。
If the new slewing bearing needs to be imported, the price will be about 100 thousand yuan, and the supply cycle will be longer. The excavator itself is an old machine, so it is not necessary to replace the new slewing bearing, so it is decided to repair the original slewing bearing. Due to the timely detection problem, the damage of the inner and outer raceway of the slewing bearing is not very serious. After observation and measurement, the inner and outer raceway deformation of the slewing bearing is only a pitting in the raceway, and it can still be used.
因此决议采取互换隔绝套,钢球和密封装置的要领举行修复。原反转展转支承的钢球丈量后其直径为28.48mm,而外洋南方双彩网产品只能买到直径为28.60mm的钢球,比原机的钢球直径大0.12mm。原机反转展转支承内共有隔绝套和钢球136个。滚道内的钢球和隔绝套的长度比原来长16.32(136×0.12),每个隔绝套尺寸应相应减小0.12mm,才气包管反转展转支承内隔绝套和钢球恰恰装满滚道。购置钢球时采取选配要领,必需包管钢球直径方向小于0.002mm。隔绝套也要多做些,供装置时选用。要是装到后仍不克不及包管和原来的数量类似,应再减小局部开离套的尺寸,直到与原反转展转支承隔绝套和钢球数量类似并弥漫整个滚道为止。
加长臂挖掘机出租
Therefore, it is decided to replace the isolation sleeve, the steel ball and the sealing device to repair. The diameter of the steel ball after the original slewing bearing is 28.48mm, while the domestic product can only buy a diameter of 28.60mm steel ball, larger than the diameter of the original ball steel 0.12mm. There are 136 isolating sleeves and steel balls in the original machine slewing bearing. The length of the ball and isolation sleeve in the raceway is 16.32 (136 * 0.12) longer than that in the original, and the size of each isolating sleeve should be reduced by 0.12mm to ensure that the inner sleeve and the ball in the rotary support are just filled with the raceway. When selecting steel balls, the matching method must be adopted to ensure that the diameter error of the ball is less than 0.002mm. The isolating sleeve should also be done more for the selection of the assembly. If the number is not guaranteed to be the same as the original number, the size of the partial isolating sleeve should be reduced until the same number and the whole raceway with the original slewing sleeve and the steel ball.
反转展转支承的陈设
Installation of rotary support
起首,将反转展转支承内、外座圈(包括滚道),钢球,隔绝套,密封装置和螺栓孔等洗濯洁净,并将外座圈放在内座圈上,基本上包管内、外座圈的滚道处在同一平面 上,然后将钢球和隔绝套颠末径向孔放入滚道(如图1),放入序次为一个钢球一个隔绝套,直至装满,再把窒息3堵上,把锥销2打紧。装置密封装置时,将密封装置与密封槽打仗的局部涂上密封胶,以包管密封结果。转动反转展转支承,看有无卡紧征象,如有卡紧征象应予以修配,使之可以大约机动转动。后再颠末反转展转支承外座圈的黄油嘴加注黄油,使滚道弥漫黄油,并在反转展转小齿轮和反转展转大离圈的油池内注满黄油。
First, the inner and outer ring (including the raceway), the steel ball, the isolation sleeve, the sealing device and the bolt hole are cleaned, and the outer ring is placed in the inner ring, basically ensuring the raceway of the inner and outer rings on the same plane, and then the steel ball and the isolating sleeve are put into the raceway through the radial hole (as in Figure 1). The order is a steel ball, an isolation sleeve, until it is filled, then plug 3 plugs and tighten the taper pin 2. When the sealing device is assembled, the sealing part and the contact part of the sealing groove are coated with sealant to ensure the sealing effect. Turn the slewing bearing to see if there is any clamping phenomenon. If there is a clamping phenomenon, it should be repaired so that it can be flexibly rotated. Finally, add butter to the butter mouth of the outer seat ring and fill the raceway with butter and fill the butter in the rotary pinion and the oil pool of the revolving circle.
用起重机将挖掘机的上车吊起,将反转展转平台的下止口对准反转展转支承的外座圈,对正后,用与螺栓直径相近的圆钢颠末螺栓孔把上车和下车对正定位,然后装置螺栓,螺栓的螺纹上应涂以乐泰防松胶。螺栓呈三角形对称陈设如图3。先陈设第1组3个螺栓。再陈设第2组3个螺栓。末端时螺栓不克不及拧紧,待把螺栓全部陈设中止后,再用力矩扳手逐一将螺栓拧紧,拧紧力矩为650N?m。陈设中止,启动呆板,使之做反转展转等种种方法,直至克复正常为止。
The hoisting of the excavator is lifted with a crane, the lower stop of the rotary platform is aligned with the outer ring of the revolving support. After the straight, the round steel with the diameter of the bolt is positioned by the bolt hole through the bolt hole, then the bolt is assembled, and the screw thread should be coated with the lotai anti loose glue. The bolts are fitted with triangular symmetry as shown in Figure 3. First sets of 3 bolts are installed first. Second sets of 3 bolts are installed. At the beginning, the bolts must not be tightened. When the bolts are installed, the bolts can be tightened one by one with the torque wrench, and the tightening torque is 650N? M. After installation, start the machine and turn it into various movements until it is restored to normal.
该机自缝补后,曾经延续变乱了一年,反转展转支承未发现任何标题。
The machine has been working for one year since its repair, and the slewing bearing has not found any problems.
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