초록 ▼

A new throat bushing for use with rotary fluid equipment (10) having a seal cavity (28) defined by a shaft (14), a shaft housing (13), and a seal (26) engaging the shaft, which includes an annular shaped element (50, 62, 66, 90, 92, 108, 120) for securement to the housing (13) at the entrance to the

A new throat bushing for use with rotary fluid equipment (10) having a seal cavity (28) defined by a shaft (14), a shaft housing (13), and a seal (26) engaging the shaft, which includes an annular shaped element (50, 62, 66, 90, 92, 108, 120) for securement to the housing (13) at the entrance to the cavity. The shaft can pass through the element and rotate freely, without contact. A spiral groove (64, 88, 98, 122), or multiple spiral grooves, may be cut into the radial surface (60) facing towards the seal. The groove is configured to guide any abrasives radially inwardly, away from the cavity bore, toward the shaft. Through this mechanism, any contaminants are easily removed from the seal cavity by the use of a minimum flow of clean flush injected into the seal cavity.

대표청구항 ▼

A seal cavity throat bushing for use with rotary fluid equipment having a seal cavity which is defined by a rotary shaft having an axis, a shaft housing surrounding at least a portion of the shaft, and seal means engaging the shaft and said housing at one end of the cavity, said bushing comprising a

A seal cavity throat bushing for use with rotary fluid equipment having a seal cavity which is defined by a rotary shaft having an axis, a shaft housing surrounding at least a portion of the shaft, and seal means engaging the shaft and said housing at one end of the cavity, said bushing comprising an annular element adapted for a tight fit in said housing at an entrance to said cavity opposite said one end, said element having a radially outer cylindrical surface for contacting a cavity wall of said housing, a radially inner cylindrical surface having a diameter greater than that of said shaft to define a gap therebetween, and an annular face surface which, with said bushing in position at said entrance, faces said cavity and slopes inwardly towards said entrance from said bushing outer surface to said bushing inner surface, said sloping face surface serving to direct fluid and contaminants within said cavity towards said gap during operation of said rotary equipment.