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¡¡¡¡(1) Ôö¼Ó³ÝÂֱóö¿ÚÖÁµ¥ÎÈ·ÖÁ÷·§¹Ü·µÄͨ¾¶,ÓÉφ18mm¼Ó´óµ½φ25mm,ʹÓÍÁ÷ÔÚ¹ÜÄÚµÄÁ÷³öËÙ¶ÈÓÉÔÀ´µÄ10.3m/s½µÖÁ5.3m/s,´ó´ó¼õÉÙÁËÓÍÒºÁ÷¾¹Ü·ʱµÄѹÁ¦Ëðʧ,ͬʱ½µµÍÁËÕñ¶¯ºÍÔëÉù¡£
¡¡¡¡(1) Increase the diameter of gear pump outlet to monostable distributor valve pipeline from 18 mm to 25 mm, so that the oil flow velocity in the pipeline decreases from 10.3 m/s to 5.3 m/s, which greatly reduces the pressure loss of oil flow through the pipeline, and reduces the vibration and noise.
¡¡¡¡(2)ÔÚ²»¸Ä±ä³µ¼ÜÕûÌå½á¹¹µÄͬʱ,½«Ðîµç³ØÏäÏòÇ°ÒÆ¶¯,Ê¡³öµÄ¿Õ¼äÓÃÓÚÔö¼ÓÓÍÏäµÄÈÝ»ý,ÓÍÏäµÄÈÝÁ¿ÓÉÔÀ´µÄ100L¼Ó´óµ½150L£ºÁíÒ»·½Ãæ¸Ä±äÓÍÏäµÄ½ø³öÓÍ¿ÚÖ®¼ä¾àÀë,ÓÉÔÀ´µÄ300mmÔö¼Óµ½800mm,È·±£ÁËÓÍÒºÔÚÓÍÏäÄÚÄܹ»µÃµ½³ä·ÖµÄÑ»·,²»½öÔö¼ÓÁËÓÍÏäµÄÉ¢ÈÈÃæ»ý,¶øÇÒÒ²¸ÄÉÆÁËÓÍÏäµÄÉ¢ÈÈЧ¹û¡£
¡¡¡¡(2) While not changing the overall structure of the frame, move the battery box forward and save space to increase the volume of the tank. The capacity of the tank is increased from 100L to 150L. On the other hand, the distance between the inlet and outlet of the tank is changed from 300mm to 800mm, which ensures that the oil can be fully circulated in the tank and not only increases the heat dissipation area of the tank. It also improves the heat dissipation effect of the fuel tank.
¡¡¡¡(3) ½«±ä¾ØÆ÷ÓÍÉ¢ÈÈÆ÷¸Ä×÷ҺѹÓÍÉ¢ÈÈÆ÷,ÉèÖÃÔÚתÏòÆ÷»ØÓÍÓÍ·ÖÐ,Æä°²×°Î»Öò»±ä,ÓÉ·¢¶¯»ú·çÉÈÇ¿ÖÆÀäÈ´¡£±ä¾ØÆ÷µÄÉ¢ÈȲÉÓð²»ÕÊ¡·ïÑôË®Ïä³§Éú²úµÄÓÍË®ºÏһɢÈÈÆ÷Óë·¢¶¯»ú¹²Í¬Ê¹ÓÃ,°²×°ÔÚҺѹÓÍÉ¢ÈÈÆ÷ºóÃæ,λÖÃÓë¸Ä¶¯Ç°Ò»ÖÂ;ÆäË®ÏäÉ¢ÈÈÃæ»ýΪ22.5m2,ÓÍÉ¢ÈÈÃæ»ýΪ6m2,È·±£·¢¶¯»ú¼°±ä¾ØÆ÷ÓÍÒºµÄÉ¢ÈÈЧ¹û¡£
¡¡¡¡(3) The oil radiator of the torque converter is replaced by a hydraulic oil radiator, which is installed in the oil return circuit of the steering gear. The installation position of the oil radiator remains unchanged and is forced to be cooled by the engine fan. The heat dissipation of the converter adopts the oil-water radiator produced by Fengyang Water Tank Factory in Anhui Province, which is installed behind the hydraulic oil radiator and is in the same position as before. The heat dissipation area of the water tank is 22.5m2 and the oil radiation area is 6m2, which ensures the heat dissipation effect of the engine and the oil of the converter.

¡¡¡¡(4)¸Ä±äתÏòҺѹ¸×µÄ½á¹¹,²ÉÓÃQT40—10ÇòÄ«ÖýÌúµ¼ÏòÌ×Ö§³ÐÌæ´úÔµ¼ÏòÌ×ÄÚµÄÄáÁúÖ§³Ð»·,ÁíÔö¼ÓÒ»¸öË¹ÌØ·âÃÜ·â¼þ,ͬʱ½«»îÈûÖ§³Ð»·¿í¶ÈÓÉ34mm¸ÄΪ28mm¡£
¡¡¡¡(4) To change the structure of the steering cylinder, the Nylon bearing ring in the original guiding sleeve was replaced by the support of the QT40-10 ductile iron guiding sleeve, and a Stirling seal was added. At the same time, the width of the piston supporting ring was changed from 34 mm to 28 mm.
¡¡¡¡¸Ä½øºó¶Ôϵͳ½øÐмì²â,(1)Ê×ÏȶԸĽøºóµÄתÏòҺѹ¸×½øÐе¥ÔªÊÔÑé,°Ñ¸Ä½øºóµÄתÏòҺѹ¸××°Ôڲ泵תÏòÇÅÌåÉϽ«ÓÍÒºÖð½¥Ç¿ÖƼÓÈÈÖÁ120¡æÒÔÉÏ,´ËʱתÏòҺѹ¸×¹¤×÷Õý³£•¡ñ¡¢ÎÞÒìÏìÏÖÏó;(2)¶ÔÕû»úҺѹϵͳѹÁ¦Ëðʧ½øÐвâÊÔ,ÔÚÎÞÔØ¹¤¿öϳÝÂֱóö¿ÚѹÁ¦ÓÉÔÀ´µÄ2.0MPa½µÖÁ1.5MPa,¼õÉÙÁËҺѹϵͳµÄ×èÁ¦ËðʧºÍ·¢ÈÈ;(3)¶ÔÕû»ú°´ÕÕÆ½ºâÖØÊ½²æ³µÕû»úʵÑé·½·¨JB/T3300—1992±ê×¼½øÐÐÕû»úÈÈÆ½ºâÊÔÑé,Õû»úÔËÐÐ1h 42minºóҺѹÓÍÔÚ½Ó½ü90YʱÇ÷ÓÚÆ½ºâ,ÇÒ·¢¶¯»úˮμ°±ä¾ØÆ÷ÓÍξùÔÚÕý³£¹¤×÷ζȷ¶Î§ÄÚ¡£
¡¡¡¡After improvement, the system is tested. (1) Unit test is carried out on the improved steering hydraulic cylinder. The improved steering hydraulic cylinder is installed on the steering axle body of forklift truck and the oil is gradually forced to heat to more than 120 C. At this time, the steering hydraulic cylinder works normally and has no abnormal sound; (2) Pressure loss of the hydraulic system of the whole machine is tested, and the outlet pressure of gear pump is changed from the original under no load condition. 2.0 MPa is reduced to 1.5 MPa, which reduces the resistance loss and heat of the hydraulic system; (3) According to JB/T3300-1992 standard, the thermal balance test of the whole machine is carried out. After running for 1 hour and 42 minutes, the hydraulic oil tends to balance when approaching 90Y, and the water temperature of the engine and the oil temperature of the torque converter are within the normal working temperature range.
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