Air pre-cleaner
First Claim
1. An air pre-cleaner that separates particulates from air comprising:
- a hood having at least one opening through which air enters the pre-cleaner;
a vane assembly including a centrally positioned dome, a collar encircling said dome and a plurality of vanes each vane being connected at an inner end to said dome and at an outer end to said collar, each vane being angled in relation to a horizontal plane, and wherein a pitch of at least one vane of said plurality of vanes is twisted along its length to keep a chord width of the at least one vane relatively constant over the length thereof;
a rotating impeller assembly rotatably mounted to said vane assembly; and
a base to which said vane assembly and said hood are secured wherein said base includes at least one clean air outlet opening through which air exits the pre-cleaner and at least one dirty air outlet port through which particulates entrained in air exit the pre-cleaner.
1 Assignment
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Accused Products
Abstract
An air pre-cleaner for centrifugally ejecting heavier than air particulates from an air stream for use in an apparatus having an air intake includes a hood having an opening through which air enters the pre-cleaner. A vane assembly includes a centrally positioned dome, a collar encircling the dome, and a plurality of inlet vanes each being connected at an inner end to the dome and at an outer end to the collar. Each inlet vane is angled in relation to the horizontal plane. The vane assembly further includes a horizontal wall extending radially outward from the collar. An impeller assembly is rotatably mounted to the vane assembly. Also provided is a base on which the vane assembly is supported via the horizontal wall. The hood, the vane assembly and the base are secured to each other. Clean air exits the pre-cleaner through a central opening in the base and dirty air exits the pre-cleaner through peripheral openings in the base.
85 Citations
22 Claims
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1. An air pre-cleaner that separates particulates from air comprising:
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a hood having at least one opening through which air enters the pre-cleaner;
a vane assembly including a centrally positioned dome, a collar encircling said dome and a plurality of vanes each vane being connected at an inner end to said dome and at an outer end to said collar, each vane being angled in relation to a horizontal plane, and wherein a pitch of at least one vane of said plurality of vanes is twisted along its length to keep a chord width of the at least one vane relatively constant over the length thereof;
a rotating impeller assembly rotatably mounted to said vane assembly; and
a base to which said vane assembly and said hood are secured wherein said base includes at least one clean air outlet opening through which air exits the pre-cleaner and at least one dirty air outlet port through which particulates entrained in air exit the pre-cleaner. - View Dependent Claims (2, 3, 4, 6, 7)
a side wall;
a base wall secured on a first face thereof to said side wall and extending substantially radially inward from said side wall, said clean air outlet opening being defined in said base wall; and
,a sleeve secured to a second face of said base wall and encircling said clean air outlet opening.
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4. The air pre-cleaner of claim 3 wherein said at least one dirty air outlet port is defined in at least one of said side wall and said base wall.
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6. The air pre-cleaner of claim 1 wherein said rotating impeller comprises:
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a hub;
at least one arm secured to and extending radially outward from said hub;
a first blade mounted at a distal end of said at least one arm; and
,a second blade mounted at a proximal end of said at least one arm.
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7. The air pre-cleaner of claim 6 wherein said first blade comprises a first section and a second section, wherein said second section extends at an obtuse angle in relation to said first section.
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5. An air pre-cleaner that separates particulates from air comprising:
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a hood having at least one opening through which air enters the pre-cleaner;
a vane assembly including a centrally positioned dome, a collar encircling said dome and a plurality of vanes each vane being connected at an inner end to said dome and at an outer end to said collar, each vane being angled in relation to a horizontal plane, a rotating impeller assembly rotatably mounted to said vane assembly;
a base to which said vane assembly and said hood are secured wherein said base includes at least one clean air outlet port through which air exits the pre-cleaner and at least one dirty air outlet port through which particulates entrained in air exit the pre-cleaner; and
,a stator vane secured to said base adjacent the said clean air outlet port.
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8. An air pre-cleaner for centrifugally ejecting heavier than air particulates from an air stream for use in an engine having an air intake, comprising:
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a hood having an opening through which air enters the pre-cleaner;
a vane assembly including centrally positioned dome, a collar encircling said dome and a plurality of vanes, each vane being connected at a radially inner edge to said dome and at a radially outer edge to said collar, each vane being angled in relation to a horizontal plane;
a rotating impeller assembly rotatably mounted to said vane assembly; and
,a base on which said vane assembly and said hood are supported, wherein said hood, said vane assembly and said base are secured to each other, wherein said base comprises;
a clean air outlet port located in said base, a dirty air outlet port located in said base, and, a stator vane mounted on said base, said stator vane being located adjacent said clean air outlet port, said stator vane extending parallel to an axis of said outlet port. - View Dependent Claims (9, 10, 11, 12, 13, 14)
at least one arm extending radially outwardly from said hub; and
,a blade mounted on a distal end of said at least one arm.
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13. The air pre-cleaner of claim 12 wherein said blade comprises a first section which extends approximately parallel to said arm and a second section which extends at an acute angle in relation to said arm.
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14. The air pre-cleaner of claim 13 wherein said first section of said blade is larger in area than is said second section of said blade.
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15. An apparatus for separating particles from a gas carrying the particles, comprising:
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a housing including a separation chamber, said housing having an inside wall surface surrounding said chamber, said housing comprising;
an inlet opening through which air enters the pre-cleaner, a vane assembly including a plurality of inlet vanes, a dirty air exhaust port through which air entrained dirt and dust particles exit said housing, and a clean air exhaust port; and
,an impeller assembly rotatably mounted in said separation chamber and wherein at least one of said plurality of inlet vanes comprises a first portion and a second portion wherein said second portion is canted in relation to said first portion and is wider at a bottom end thereof than at a top end thereof. - View Dependent Claims (16, 17, 18, 19, 21, 22)
a hub, at least one arm extending radially outwardly from said hub, and a first blade mounted at a distal end of said at least one arm, said first blade comprising a first section which extends along an axis approximately parallel to said arm and a second section which extends at an acute angle to said axis.
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17. The apparatus of claim 16 wherein said impeller assembly further comprises a second blade mounted at a proximal end of said at least one arm.
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18. The apparatus of claim 17 wherein said impeller assembly further comprises four arms, each including a first blade and a second blade, said arms being spaced from each other so as to have a cruciform shape.
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19. The apparatus of claim 15 further comprising a fastener for securing said impeller assembly to said housing and a bearing positioned between said impeller assembly and said housing for enabling rotation of said impeller assembly in relation to said housing.
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21. The apparatus of claim 15 wherein a pitch of each inlet vane of said vane assembly is twisted to keep a chord width of each inlet vane relatively constant over the full vane length.
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22. The apparatus of claim 15 wherein a vane chord of each inlet vane of said vane assembly is slightly wider at an inner diameter than at an outer diameter of that inlet vane.
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20. An apparatus for separating particles from a gas carrying the particles, comprising:
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a housing including a separation chamber, said housing having an inside wall surface surrounding said chamber, said housing comprising;
an inlet opening through which air enters the pre-cleaner, a vane assembly including a plurality of inlet vanes, a dirty air exhaust port through which air entrained dirt and dust particles exit said housing, and a clean air exhaust port; and
,an impeller assembly rotatably mounted in said separation chamber; and
,a stator vane positioned adjacent said dirty air exhaust port.
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Specification