Internal venting system for industrial machines
View Patent ↗A mining shovel includes a boom and a transmission unit coupled to the boom. The transmission unit includes an outer housing, an internal motor housing disposed within the outer housing, and a venting system coupled to the outer housing to direct air through both the outer housing and the internal motor housing.
1. A transmission unit for a mining shovel, the transmission unit comprising:
an outer housing configured to be coupled to a boom of the mining shovel, the outer housing including a gear case; and
an internal motor housing disposed within the outer housing;
wherein the internal motor housing includes an aperture configured to direct vented air between the outer housing and the internal motor housing.
2. The transmission unit of claim 1 , wherein the internal motor housing is a first internal motor housing, and wherein the transmission unit includes a second internal motor housing disposed within the outer housing.
3. The transmission unit of claim 1 , wherein the internal motor housing includes four inlet apertures to receive vented air from the outer housing.
4. The transmission unit of claim 3 , wherein the four inlet apertures are spaced approximately 90 degrees apart from one another.
5. The transmission unit of claim 1 , further comprising a venting system coupled to the outer housing to direct air through both the outer housing and the internal motor housing.
6. The transmission unit of claim 5 , wherein the venting system includes a blower.
7. The transmission unit of claim 6 , wherein the venting system including a ducting coupled to the blower.
8. The transmission unit of claim 1 , wherein the transmission unit is a crowd drive for a mining shovel.