【文章內(nèi)容簡介】 orizontal to avoid cavitation (See Figure, 6). 13 Figure 6 Reducing pipe with horizontal upper generating line When we adjust the capacity of pump with throttle, throttle should be installed on the discharge pipeline. When throttle is fixed on suction pipeline, cavity will happen easily. (4) Pipelines of watersealing and watercooling Packing seal will be equipped with stubs and piezometer. We must install pressure gauge on shaft seal water pipeline to adjust the pressure of shaft seal water. The setting of shaft seal water pipeline and watercooling pipeline are seen Figure7. The Shaft seal water Watercooling Figure 7 Arrangement of shaft seal water pipeline 14 The pressure of shaft seal water should be puted according as the following formula. Table 1 Pressure and Capacity of shaft seal water Sealing Type The Pressure of shaft seal water Pi’ (Mpa) The flow of shaft seal water （ m3/h） G1/4” G3/8” G1/2” G3/4” Expeller Seal （Ⅰ stage pump) Pi’ = 1~ ~2 2~3 3~5 Packing Seal Pi’ =(i1/3)P Mechanical Seal Pi’ =P 出 + pump flow 1%, when the flow is large choose small values, flow is small choose big value , but the minimum shaft seal water quantity not less than 1 m3 / h Note: This Table is suitable to single stage pump. When the suction pressure of pump is 0 (Pin=0), the pressure of shaft seal water is equal to the half of the pressure of pump exit (P’ =1/2Pout). The pressure of watercooling is between ～ , the capacity is between 1～ 3 m3 /h. The type of watercooling see Table 2. 15 Table 2 Type of Packing, watersealing and watercooling No. Model Packing Specification (mm) ssssSsSSpecificatioSpecificationpecification Specification （ mm） (mm) Shaft Seal Pipe Joint Cooling Water Pipe Joint 1 300ZJ— Ⅰ — A100 22 22 636 G3/4″ G1/2″ 2 300ZJ— Ⅰ — A95 3 300ZJ— Ⅰ — A90 22 22 605 G3/4″ G1/2″ 4 300ZJ— Ⅰ — A85 5 300ZJ— Ⅰ — A70 19 19 502 G1/2″ G1/2″ 6 300ZJ— Ⅰ — A65 7 300ZJ— Ⅰ — A56 8 250ZJ— Ⅰ — A103 22 22 605 G3/4″ G1/2″ 9 250ZJ— Ⅰ — A96 10 250ZJ— Ⅰ — A90 11 250ZJ— Ⅰ — A85 12 250ZJ— Ⅰ — A83 13 250ZJ— Ⅰ — A80 14 250ZJ— Ⅰ — A78 15 250ZJ— Ⅰ — A75 19 19 502 G1/2″ G1/2″ 16 250ZJ— Ⅰ — A73 17 250ZJ— Ⅰ — A70 18 250ZJ— Ⅰ — A68 19 250ZJ— Ⅰ — A65 20 250ZJ— Ⅰ — A63 21 250ZJ— Ⅰ — A60 22 200ZJ— Ⅰ — A85 22 22 605 G3/4″ G1/2″ 23 200ZJ— Ⅰ — A75 19 19 502 G1/2″ G1/2″ 16 24 200ZJ— Ⅰ — A73 25 200ZJ— Ⅰ — A70 19 19 455 G1/2″ G1/2″ 26 200ZJ— Ⅰ — A68 27 200ZJ— Ⅰ — A65 28 200ZJ— Ⅰ — A63 29 200ZJ— Ⅰ — A60 30 200ZJ— Ⅰ — A58 31 150ZJ— Ⅰ — A70 32 150ZJ— Ⅰ — A65 33 150ZJ— Ⅰ — A63 34 150ZJ— Ⅰ — A60 35 150ZJ— Ⅰ — A58 36 150ZJ— Ⅰ — A55 37 150ZJ— Ⅰ — C58 38 150ZJ— Ⅰ — A57 39 150ZJ— Ⅰ — A50 16 16 364 G1/2″ G3/8″ 40 150ZJ— Ⅰ — A48 41 150ZJ— Ⅰ — C42 42 100ZJ— Ⅰ — A50 43 100ZJ— Ⅰ — A46 44 100ZJ— Ⅰ — A42 13 13 308 G1/2″ G3/8″ 45 100ZJ— Ⅰ — A39 46 100ZJG— Ⅰ — B42 47 100ZJ— Ⅰ — A36 G3/8″ G1/2″ 48 100ZJ— Ⅰ — A33 49 80ZJ— Ⅰ — A52 16 16 364 G1/2″ G3/8″ 50 80ZJ— Ⅰ — A42 13 13 308 G1/2″ 17 51 80ZJ— Ⅰ — A39 52 80ZJ— Ⅰ — A36 13 13 308 G3/8″ 53 80ZJ— Ⅰ — A33 54 65ZJ— Ⅰ — A30 10 10 226 G1/4″ 55 65ZJ— Ⅰ — A27 56 50ZJ— Ⅰ — A50 16 16 364 G1/2″ G3/8″ 57 50ZJ— Ⅰ — A46 13 13 308 G1/2″ G3/8″ 58 50ZJ— Ⅰ — A33 10 10 226 G1/4″ 59 40ZJ— Ⅰ — A17 8 8 163 G1/4″ (5)Packing selection ① packing material and choose Asbestos packing with mica should be often used when the working pressure of pump is less than and asbestos packing with ploytetrafluoroethylene should be used when the pressure is more than MPa. ② The type of packing see Table 2. ③ Packing Requirement The packing standard should be accord with stuffing box size, and from the direction of shaft, joints of the adjacent packing rings included 120176。 . (6) Mechanical seal Mechanical seal is a kind of end face seal, zero leakage, low power consumption, etc. Mechanical seal used in slurry pump special need to pay attention to the following questions: ① Our factory adopts the mechanical seal is generally balanced double end face for 18 special purpose, equipped with cooling water pipe, pressure gauge. ② Professional mechanical seal factory made it for our factory, and factory has good installation and debugging, the user can no longer for debugging. ③ Mechanical seal parts, import and export of shaft seal water, respectively, among them with the pump outlet in the same side as an outlet, the other side of the inlet. ④ Before use the equipped mechanical seal pump must first turn on the shaft seal water, stop the pump 3 minutes rear can close the shaft seal water. ⑤ Provide customers with mechanical seal of spare parts, according to a suite. ⑥ Equipped with mechanical seal of pump and mechanical seal of spare parts when not in use for a long time, mechanical seal parts should include full N46 machine oil, to prevent rust and internal rubber parts failure mechanical seal parts. (7) The Requirement of add Lubricating oil Thin oil lubrication carrier should be in according to the oil standard oil line before driving position and N32 by mechanical blending (winter) or N46 oil (summer). Avoid by all means is oilfree drive!!!!! 3. Adjustment of pump We examine and adjust pumps after assembly. (1) Adjustment of the interval between impeller and front liner (See Following) (2) Adjustment of rotation direction of motor Motor39。s direction of rotation must be in accordance with pump39。s direction of rotation. When pump operate in opposite direction, some parts will be damaged. After pumps 19 are divorced from motors pletely, we can regulate motor direction of rotation.