1、Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.4.1.2 Dither. - The dither mechanism shall vibra the eye and touch. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Provided by IHSNot for ResaleNo re
2、production or networking permitted without license from IHS-,-,-Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-f . MIL-G-13507 12 m 9999906 0295418 L m .- of one minute. Three of the first five and one out of every additional 50 or fraction thereof
3、shall be subjected toghe test voltage which shall be applied at a rate not exceeding 500 volts (rms) per second, For all other units the test voltage. shall be applied instantaneously for a period of not less than 5 seconds or more than 30 sec- onds. The motor capacitor and starting relay shall be d
4、isconnected to prevent damage, Insulation resistance test shall be performed immediately after this test. 4.2.2 insulation resistance. - The insulation resistance shall be measured by an approved method using a source of d-c potential of 500 volts. The motor capacitor shall be disconnected for thig
5、test, in accordance with SpecificQjp MIL-S-10379, 1 4.2.3 io interference. - The oil gear shall be tested for radio interference 4.3 Performance 4.3.1 General. - Tests shall be conducted when hydraulic oil is at a temperature of 115F plus or minus 4F. 4.3.2 Transmission and valve assembly. - All out
6、put values shall apply to both clockwise and counterclockwise rotation. 4.3.2.1 -Replenishing pump pressure. - With assembly in place and power motor energized, pressure shall meet the requirements of 3.4.1.1, *. 4.3.2.2 Pilot piston positioning, - The position of pilot piston shall.be tested as fol
7、lows: a. Adjust syrkhro so that stops are equidistant from the pir, on the differen- tial .stator and the differential damping spring is in approximate horizon- tal position. Place unit in test stand. a b, c. Rough adjust for equal speed in both directions. d, Electrically zero and adjust pilot pist
8、on for approximate zero output of flywheel (60 rpm maximum of transmission output shaft). . e, Deenergize synchro and adjust motion of flywheel to approximate zero (60 rpm maximum of transmission output shaft) by adjusting mechanical zero lever. Adjust differential synchro with electrical zero excit
9、ation to approximate zero output of flywheel (60 rpm maximum of transmission output shaft), f, . 4.3.i. 3 Differential synchro. - The differential synchros shall be switched to electrcal zero connections and output speed shall be observed and recorded. If the hydraulic motor speed is greater than 60
10、 rpm, loosen clamp screws and rotate - stator as required, / 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-that temperature, the top surface shall b
11、e exposed to 360 BTU/Ft. Sq/Hrr, for a period of 4 hours. The oil gear then shall be tested for conformance with the perform- ance requirements of this specification. The unit shall be allowed to return to normal room temperature and test shall be made for conformance with 3.5.1. . . 4.4,3 Humidity.
12、- A test chamber that is capable of being sealed shall be used; the source of heat shall be arranged in such a manner that the radiant heat will not fall upon the unit being tested. An oil gear shall be placed in the chamber, the temper- ature of which is adjusted to plus 46.1“C f 1. 1C (;t 115F f 2
13、F) and the relative -humidity adjusted to 95 percent f 5 percent. The unit shall remain under the above conditions for 9 period of 6 hours. The temperaturo of the chamber shall be readjusted to plus 26.7“C f 1.1“C (t 80F f 2F) and the oil gear shall be a1l:wed ta remain under this new condition for
14、a period of 6 hours. The transitional period shall be 2 hours; the rate of change during that period shall be uniform. The above c-tcle shall be re- peated 10 times, Immediately after this test, the oil gear shall, meet the require- ments of 3.5.2. 4.4; 4. Rain, - The oil gear shall be mounted in th
15、e test chamber to simulate installation conditions. The rain test chamber temperature shall be maintained be- tween 20C to 30C (68F to 86F) throughout the test period. A simulated rainfall of 4 plus i inch per hour shall be produced by a suitable means of such design that the water is emitted in the
16、 form of small droplets rather than a fine mist. The temperature of the water shall be maintained between 11C to 24C (51.8“F to 75.2“F). The water spray shall be directed on the oil gear for a period of 2 hours in directions ranging from vertical to 45“ from the vertical. The simulated rain shall be
17、 directed on all surfaces of the oil gear that are normally subjected to rain when the instrument is in its operating position, 4.4.5 Vibration. - The oil gear shall be mounted using its own mounting pro- visions, to simulate field use. Each wit tested shall be vibrated successively along each of th
18、e three mutually perpendicular directions with accelerations and excursions as shown below. Applied frequency shall be changed at asuniform rate between the limits indicated; the rate of change shall not exceed one cycle per second. . Frequency limits Excur s ion Acceleration Time (each direction) o
19、 - 1ocps * 0.060 inch - 1 hour 10 - 20cps 0.030 inch -_- 2 hours 20 - 400 CS -1i 2.5 g1.8 2 hours to simulate field use. A shock of 20 grs shall be imparted three times in each di- rection along each of the three mutually perpendicular directions, making a total of 18 shocks, Each shock impulse shal
20、l have a time duration of 11 Et 1 milliseconds; the maximux g value shall occur at approximately 5.5 milliseconds and shall be within & 10 percent. Filters used shall have cut-off frequencies selected to eliminate all harmonics above the fundamental, from the measured shock pulse. 4.4.6 Shock. - The oil gear shall be mounted, using its own mounting provisions, . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
