Patent Application
20120017711
The present invention relates generally to the field of aeronautics and astronautics. Applications are in all types of lift and suspend loads devices installed in aircraft or spacecraft.
Devices that has powered single rotation means tend to rotate itself in the same direction that the rotating mass of that means when the capacity of the foundation is not able to restrain the movement of the enclosure of the whole system. One of such devices is the one to dynamically lift and suspend loads. It was found that up to certain low capacity such devices can be restrained by simple bases, like a table, while higher capacity devices need a foundation to the ground, and those of medium or high capacity lacking the ground foundation, like aircraft or spacecraft, need some means to cancel the undesirable rotation while in operation. Thus, there is an actual need to accomplish this goal.
A mechanical gear box fixed to the ceiling of the enclosure or the floor, or both, of a lift and suspends loads system, coupled to the main powered shaft that invert the direction of rotation and transmit such counter rotation to the enclosure through the said box.
The main powered shaft must have new contours for adaptation of the gear box as required. The ceiling bearing of the main shaft exists per construction of the device, probably without modifications or modified per each particular detailed design of the device. The box contains a simple system of two equal or unequal diameters conic gears to change direction of rotation, and a conic gear coupling both. As in the device itself, two or more auxiliary arms have a weight at some distance of the center of rotation to help calibrate the energy of the counter system to cancel the undesired rotation of the device enclosure. That calibration includes different friction coefficient for ball bearing A and roller bearing B, different diameter of conic gears in the gear box, and different arm's length. The arms length is adjusted by moving the weight along its length and fixing them in its final positions. Bearings A located at the ceiling and floor of the enclosure, and bearing 15 in
A detailed description of this drawing can be seen in Pub. No. US 2009/0129912 A1, Pub. Date: May 21, 2009.
Parts 19 and 20 show locations where the gear box(es) must be located.
This attachment is activated by the rotating powered shaft 1 of the device. The shaft 1 rest on a bearing here decomposed in two parts 2 and 3. Another equivalent bearing 16 in
The enclosure 4 belongs to the structure of the device. The gear box case 5 is fixed to the enclosure. The assembly of gears in the gear box consists of a horizontal conic gear 6 solidly fixed to the shaft 1, a vertical conic intermediate gear 7 with its own bearing fixed to the gear box wall, and a horizontal conic gear 8 not connected but separated from the shaft 1 free to counter rotate. Appended to this gear, optional arms 9 moving perpendicular to the shaft 1, carrying moving equal weights 10 which can be moved along the arm's length and adjusted in a convenient position by nuts 11 or other means. The arms of the device rotates at increasing circular motion until a proper rpm is reached to suspend the loads, its work differs from the arms of this attachment which provide no mechanical work but contribute with a inertial force in the balancing equalization of the rotation-counter rotation process.
In
The net suspended capacity dP for weight reduction was calculated from physics as
where W (Kg)=weight at end of one arm; n=number of arms; L (meter)=length of arm; and RPM=revolutions per minute.
The power required for the dP capacity is:
P(HP)1=0.008653*RPM*n*W*L
We can add an estimate of additional power required for the counter rotation system considering rotation force at bearing 15 in
P(HP)2=0.00014*RPM*n*W
conversion to dP units (Kg) can be made by the relation:
Losses(Kg)=(P(HP)2/P(HP)1)*dP
Losses (Kg) are to be subtracted from the dP computed without losses, and P(HP)1 will remain the same but the Available Lifting Capacity will be reduced.
Losses(Kg)=(P(HP)2/P(HP)1)*dP=(0.00014*600*4*10/124.6)*2,438.3=(3.36/124.6)*2,438.3=0.0269663*2,678.3=72.2 Kg
where the losses (inefficiency) is zero. In the second run we introduce losses (inefficiency) as 72.2 Kg to obtain: Same Engine Power (124.6 HP), but now the Available Lift Capacity is reduced by the same amount (2,438.3 Kg−2,366.1 Kg=72.2 Kg.
The total P(HP)T=P(HP)1+P(HP)2 is subject to check by operating a prototype and measure the input required.
Thus there has been described an attachment to a device to dynamically suspend loads as a mean to counter the effect of rotation if it appears when the device is operating. While the invention has been described in conjunction with specific embodiments thereof, it is evident that many alterations, modifications, and variations will be apparent to those skilled in the art in light of the foregoing description. Accordingly, it is intended to embrace all such alterations, modifications and variations in the appended claims.
