Improvements in or relating to a reversible gear pump

摘要

671.988. Gear pumps. BORG-WARNER CORPORATION. Sept. 27, 1950 [Nov. 19, 1949], No. 23666/50. Class 110(ii) A pump with gears 7, 8 on shafts 12, 13 has two driving couplings 16, 17, one on each shaft, a driving shaft 21 engaging one coupling. If the pump is to be driven in an unchanged direction by a motor which rotates in the opposite direction, the casing 5 is detached from a mounting 6, turned through 180 degrees and re-assembled so that the shaft 21 engages the coupling 16 The coupling 17 is then located in recess 20. Sealing means comprise springs 27 and 23 pressing on collars arranged as shown. Leakage fluid from the pump collects in a groove 30 and is removed through one of the drains 31 or 33. One set of end bush-. ings 9, 10 may be pressure-loaded externally for sealing purposes.