| 摘要 |
The purpose of the present invention is to provide a small, light coolant-pump device equipped with a filter, said coolant-pump device not requiring regular maintenance. The present invention is provided with: a positive-displacement pump (9); a cyclone filter (12) provided on the intake side of the positive-displacement pump; and a non-positive-displacement pump (40) provided on the intake side of the cyclone filter (12). The cyclone filter (12) contains a primary cyclone (20) and a secondary cyclone (30) each provided with a mechanism (outlet (20c and 30c)) through which separated foreign substances (cutting debris and the like) are expelled. The present invention is set such that the discharge rate of the non-positive-displacement pump (40) is higher than the discharge rate of the positive-displacement pump (9).The positive-displacement pump (9), cyclone filter (12), and non-positive-displacement pump (40) are connected in a vertical straight line. |
