| 摘要 |
A gear pump for metering viscous fluid. The gear pump includes a housing with an inlet port for receiving the viscous fluid and an outlet port for discharging the viscous fluid. A driven gear and an idler gear are each mounted for rotation in the housing. The driven gear and the idler gear include respective gear teeth in a meshing relationship and forming an inlet space and an outlet space in the housing and adjacent to the meshing gear teeth. The inlet space is in fluid communication with the inlet port and the outlet space is in fluid communication with the outlet port. A flow indicating element is located in the housing and is mounted for rotation independent of the driven gear and the idler gear. The flow indicating element is configured to be rotated by the viscous fluid to indicate when the fluid is moving from the inlet port and inlet space to the outlet space and outlet port. Methods of indicating flow of viscous fluid through a gear pump are also provided. |
