Radial hole arrangement intercepting a rotational lubrication line parallel to and non-coaxial with the rotational axis
A lubrication system for a transmission, comprising: a shaft of the transmission having a fluid passage, where the fluid passage is centered on an axis that is parallel and non-coaxial to a rotational axis of the shaft, where the shaft is centered on the rotational axis; and at least two axially spaced apart radial channels, where the two axially spaced apart radial channels are fluidly communicating with the fluid passage and inclined at different angles with respect to a plane that cross-sections the shaft in a longitudinal direction with respect to the rotational axis, where the plane includes the rotational axis and the axis of the fluid passage, where the different angles decrease in size for each axially spaced apart radial channel that is further from an inlet relative to a previous spaced apart radial channel.
1 . A lubrication system for a transmission, comprising:
a shaft of the transmission having a fluid passage, where the fluid passage is centered on an axis that is parallel and non-coaxial to a rotational axis of the shaft, where the shaft is centered on the rotational axis; and
at least two axially spaced apart radial channels, where the axially spaced apart radial channels are fluidly communicating with the fluid passage and inclined at different angles with respect to a plane that cross-sections the shaft in a longitudinal direction with respect to the rotational axis, where the plane includes the rotational axis and the axis of the fluid passage, where the different angles decrease in size for each axially spaced apart radial channel that is further from an inlet relative to a previous spaced apart radial channel.
2 . The lubrication system of claim 1 , where the lubrication system is a forced lubrication transmission system, where the shaft is horizontal to a vertical axis, and the vertical axis is parallel with a direction of gravity.
3 . The lubrication system of claim 2 , where the axially spaced apart radial channels include at least a bleed channel.
4 . The lubrication system of claim 3 , where the axially spaced apart radial channels include at least two bleed channels, where the bleed channels include a first bleed channel and a second bleed channel.
5 . The lubrication system of claim 4 , where the first bleed channel and second bleed channel are angled at a first angle and a second angle from the plane, where a first centerline of the first bleed channel is separated from the plane by the first angle, where a second centerline of the second bleed channel is separated from the plane by the second angle.
6 . The lubrication system of claim 5 , where the first bleed channel is closer to the inlet than the second bleed channel along a longitudinal axis of the shaft, and the second angle is half the size of the first angle.
7 . The lubrication system of claim 5 , where the first bleed channel is closer to the inlet than the second bleed channel along a longitudinal axis of the shaft, and the second angle is less than half the size of the first angle.
8 . The lubrication system of claim 5 , where the axially spaced apart radial channels include a third bleed channel, where the third bleed channel is angled at a third angle, such that a third centerline of the third bleed channel is separated from the plane by the third angle, where the third angle is a different size than the first angle and the second angle.
9 . The lubrication system of claim 8 , where the second bleed channel is closer to the inlet than the third bleed channel along the axis of the shaft, and where the second angle is greater than the third angle.
10 . The lubrication system of claim 9 , where the third angle is at least half the size of the second angle.
11 . The lubrication system of claim 3 , where the axially spaced apart radial channels include at least two of a plurality of feed channels, where each of the feed channels has a first opening and a second opening, where the first opening is flush with and contiguous with an inner surface of the fluid passage, and the second opening is flush with an outer surface of the shaft, where each feed channel is centered on an centerline, where each centerline extends at an angle of the different angles from the plane.
12 . The lubrication system of claim 11 , where each feed channel is complementary to at least a consumer, where the consumer is positioned to receive lubricant from the second opening.
13 . The lubrication system of claim 12 , where the shaft includes at least four feed channels, including a first feed channel, a second feed channel, a third feed channel, and a fourth feed channel, where the first feed channel extends at a first angle from the plane, the second feed channel extends at a second angle from the plane, the third feed channel extends at a third angle from the plane, and the fourth feed channel extends at a fourth angle from the plane, where the first angle, the second angle, the third angle, and the fourth angle are different in size.
14 . A lubrication system for a transmission comprising:
a shaft, where the lubrication system is a forced lubrication system, where lubricant is driven under power to the shaft, where the shaft is horizontal with respect to a vertical axis, and the vertical axis is parallel with a direction of gravity, the shaft having:
a fluid passage, where the fluid passage has a centerline that is parallel and non-coaxial to an axis of rotation of the shaft, where the centerline is separated from the axis of rotation via a distance, where lubricant housed by the fluid passage has a fluid-free surface and is not driven by a pressure gradient; and
at least two axially spaced apart radial channels fluidly communicating with the fluid passage, where the axially spaced apart radial channels are inclined at different angles with respect to a plane that contains the axis of rotation and a central axis of the fluid passage.
15 . The lubrication system of claim 14 , where the transmission outputs torque to drive an on-highway vehicle, such as a passenger car.
16 . The lubrication system of claim 14 , where the transmission outputs torque to drive an off-highway vehicle.
17 . The lubrication system of claim 14 , where the transmission is an axle transmission.
18 . The lubrication system of claim 14 , where the transmission is a trans axle transmission.