Rotary lobe pumps
OwnerAntony Mark Browninventor
Life of this patent
Estimating the term…
Abstract
A rotary lobe pump is provided with an improved sealing mechanism between the rotor and outside diameter of the shaft upon which the rotor is mounted. An adapter is provided for the drive shaft which enables the drive shaft to be easily coupled to a variety of drive mechanisms. The adapter can be replaced with an alternative adapter suited to fit alternative drive mechanisms. An improved means for mounting the timing gears on the drive and driven shafts is provided which enables the timing gears to be easily adjusted during assembly to improve the rate at which rotary lobe pumps can be assembled. An improved shaft configuration is provided with a thicker boss section providing additional structural support at the timing gear. The shaft may be cast molded.
Claims22
A pump comprising:
- a shaft extending through a rotor case before being connected to a rotor at a shaft/rotor connection, the rotor comprising an inside surface oppositely disposed to an outside surface of the shaft, the pump further comprising a seal assembly for providing a seal between the inside surface of the rotor and the outside surface of the shaft,
- the seal assembly comprising a sleeve support through which the shaft passes before the shaft is connected to the rotor, the sleeve support being fixedly connected to the rotor case, the sleeve support extending from the rotor case along the shaft towards the shaft/rotor connection, the sleeve support passing through an elongated seal,
- the elongated seal being disposed between the shaft/rotor connection and the rotor housing, the elongated seal being frictionally secured to an outer surface of the seal support and extending radially outwardly to engage the inside surface of the rotor.
A pump comprising:
- a shaft extending through a rotor case before being connected to a rotor at a shaft/rotor connection, the rotor comprising an inside surface oppositely disposed to an outside surface of the shaft, the pump further comprising a seal assembly for providing a seal between the inside surface of the rotor and the outside surface of the shaft,
- the seal assembly comprising a sleeve support through which the shaft passes before the shaft is connected to the rotor, the sleeve support being fixedly connected to the rotor case, the sleeve support extending from the rotor case along the shaft towards the shaft/rotor connection, the sleeve support engaging an elongated lip seal,
- the elongated lip seal being disposed on the inside surface of the rotor, the elongated lip seal comprising a plurality of lips that extend radially inwardly at an angle towards the rotor case, the lips each comprising a distal end that engages an outside surface of the sleeve support.
A rotary lobe pump comprising:
- a drive shaft comprising an inboard end connected to a motor drive and an outboard end connected to a first rotor, the inboard end of the drive shaft passing through a first bearing and having a first diameter, a segment of the drive shaft extending through a rotor case before being connected to the first rotor, the drive shaft comprising a first boss disposed between the rotor case and the inboard end, the boss extending radially outwardly and terminating at an outer periphery having a second diameter that is larger than the first diameter,
- the pump further comprising a seal assembly for providing a seal between the inside surface of the first rotor and the outside surface of the drive shaft, the seal assembly comprising a first sleeve support through which the segment of the drive shaft passes before the drive shaft is connected to the first rotor, the segment of the drive shaft passing through the first sleeve support having a third diameter that is smaller than the second diameter.
Dependencies are inferred from the claim text.