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        液壓挖掘機回轉支承的修復和安裝事項

        日期:2018-06-14   來源:http://www.qxngd.com/
        回轉支承的修復
        Repair of rotary support
        如果更換新的回轉支承需要進口,且價格昂貴,大約10萬元左右,供貨周期也比較長。挖掘機本身為舊機器,沒有必要更換新的回轉支承,故決定對原回轉支承進行修復。由于發現問題比較及時,回轉支承的內、外滾道損壞并不十分嚴重。經過觀察和測量,回轉支承的內、外滾道變形,只是滾道有麻點,仍可繼續使用。
        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.
        因此決定采取更換隔離套,鋼球和密封裝置的方法進行修復。原回轉支承的鋼球測量后其直徑為28.48mm,而國內產品只能買到直徑為28.60mm的鋼球,比原機的鋼球直徑大0.12mm。原機回轉支承內共有隔離套和鋼球136個。滾道內的鋼球和隔離套的長度比原來長16.32(136×0.12),每個隔離套尺寸應相應減小0.12mm,才能保證回轉支承內隔離套和鋼球剛好裝滿滾道。購買鋼球時采用選配方法,必須保證鋼球直徑誤差小于0.002mm。隔離套也要多做些,供裝配時選用。如果裝到后仍不能保證和原來的數目相同,應再減小部分隔離套的尺寸,直到與原回轉支承隔離套和鋼球數目相同并充滿整個滾道為止。
        加長臂挖掘機出租
        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.
        回轉支承的安裝
        Installation of rotary support
        首先,將回轉支承內、外座圈(包括滾道),鋼球,隔離套,密封裝置和螺栓孔等清洗干凈,并將外座圈放在內座圈上,基本上保證內、外座圈的滾道處在同一平面 上,然后將鋼球和隔離套通過徑向孔放入滾道(如圖1),放入順序為一個鋼球一個隔離套,直至裝滿,再把堵塞3堵上,把錐銷2打緊。裝配密封裝置時,將密封裝置與密封槽接觸的部分涂上密封膠,以保證密封效果。轉動回轉支承,看有無卡緊現象,如有卡緊現象應予以修配,使之能夠靈活轉動。后再通過回轉支承外座圈的黃油嘴加注黃油,使滾道充滿黃油,并在回轉小齒輪和回轉大離圈的油池內注滿黃油。
        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.
        用起重機將挖掘機的上車吊起,將回轉平臺的下止口對準回轉支承的外座圈,對正后,用與螺栓直徑相近的圓鋼通過螺栓孔把上車和下車對正定位,然后裝配螺栓,螺栓的螺紋上應涂以樂泰防松膠。螺栓呈三角形對稱安裝如圖3。先安裝第1組3個螺栓。再安裝第2組3個螺栓。開始時螺栓不能擰緊,待把螺栓全部安裝完畢后,再用力矩扳手逐個將螺栓擰緊,擰緊力矩為650N?m。安裝完畢,啟動機器,使之做回轉等各種動作,直至恢復正常為止。
        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.
        該機自修理后,已經持續工作了一年,回轉支承未發現任何問題。
        The machine has been working for one year since its repair, and the slewing bearing has not found any problems.
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        Welcome to visit our long arm excavator for http://www.qxngd.com, we will show you a lot of wonderful content.

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