| 摘要 |
A pump sealing device includes a packing box whose packing (3) is disposed around a drive shaft (2) of the pump where the shaft passes through the pump body (1). The packing is acted on by a gland (4). At least two levers (5), each of which pivots on a respective pin (6), are arranged so that one end of each lever is able to exert a predetermined pressure on said rammer as soon as the pump stops and conversely to reduce the pressure to zero or substantially zero before the pump is started. The other ends of the levers are linked to means (8) to cause the levers to rotate about the pins. The device can be used in any type of pump, and in particular in pumps for corrosive liquids.
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