Clogged nozzle detection
A work machine can include a frame; a spray system couple to the frame and including a spray bar having a plurality of nozzles; a pressure sensor to detect a pressure of a liquid within the spray bar; and a controller to determine whether the detected pressure of the liquid within the spray bar has exceeded a pre-determined pressure threshold.
1. A work machine comprising:
a frame;
a spray system coupled to the frame and including a spray bar having a plurality of nozzles, the spray bar including a liquid input and only the plurality of nozzles as a liquid output;
a pump to deliver a liquid to the spray bar;
a pressure sensor to detect a pressure of the liquid within the spray bar; and
a controller to adjust the pump to deliver the liquid at a constant flow rate and to determine whether the detected pressure of the liquid within the spray bar has exceeded a pre-determined pressure threshold at the constant flow rate,
wherein, a flow rate of the liquid is determined by a flowmeter and the controller can include a look up table to determine a predicted pressure based on the known flow rate.
2. The work machine of claim 1 , wherein the spray bar includes a manifold portion configured to receive the liquid input from the pump on the frame and the plurality of nozzles to eject the liquid.
3. The work machine of claim 1 , wherein the pressure sensor includes one or more pressure sensors located within the spray bar.
4. The work machine of claim 3 , wherein the pressure sensor includes plurality of pressure sensors including a pressure sensor located at each nozzle such that a specific clogged nozzle is identifiable.
5. The work machine of claim 1 , wherein if the detected pressure goes a pre-determined amount above the predicted pressure then the controller determines one or more nozzles are clogged.
6. The work machine of claim 1 , wherein the spray system is configured to deliver the liquid into a drum housing located on the frame.
7. The work machine of claim 6 , wherein the spray system delivers the liquid onto a cutting rotor.
8. The work machine of claim 1 , wherein the spray system is configured to the spray the liquid onto a roller of a compactor.
9. A milling machine comprising:
a frame;
a milling assembly on the frame including a drum housing;
a cutting rotor located within the drum housing;
a spray system including a spray bar having a plurality of nozzles to deliver a liquid within the drum housing, the spray bar including a liquid input and only the plurality of nozzles as a liquid output;
a pump to deliver the liquid to the spray bar;
a pressure sensor to detect a pressure of a liquid within the spray bar; and
a controller to adjust the pump to deliver the liquid at a constant flow rate and to determine whether the pressure of the liquid within the spray bar has been exceeded pre-determined pressure threshold at the constant flow rate to determine whether any of the plurality of nozzles have been clogged,
wherein, a flow rate of the liquid is determined by a flowmeter and a controller can include a look up table to determine a predicted pressure based on the known flow rate.
10. The milling machine of claim 9 , wherein the milling machine is a cold planer and includes a first stage conveyor coupled to the frame, and the drum housing including a discharge port, wherein the first stage conveyor is positioned near the discharge port so as to receive material through the discharge port.
11. The milling machine of claim 9 , wherein the liquid is directed by the spray bar onto the cutting rotor.
12. The milling machine of claim 9 , wherein the spray bar includes a manifold portion configured to receive the liquid input from the pump on the frame and the plurality of nozzles to eject the liquid.
13. The milling machine of claim 9 , wherein the pressure sensor includes one or more pressure sensors located within the spray bar.
14. The milling machine of claim 13 , wherein the pressure sensor includes a plurality of pressure sensors including a pressure sensor located at each nozzle such that the specific clogged nozzle is identifiable.
15. A method of detecting a clogged nozzle in a spray bar having a plurality of nozzles, the method comprising:
delivering a liquid to the spray bar via a pump at a constant flow rate;
determining a pressure of the liquid within the spray bar, the spray bar including a liquid input and only the plurality of nozzles as a liquid output; and
if the pressure of the liquid reaches a pre-determined threshold at the constant flow rate, determining that one or more of the nozzles of the spray bar are clogged,
wherein a flow rate is determined by a flowmeter and a controller can include a look up table to determine a predicted pressure based on the known flow rate, and wherein if detected pressure goes a pre-determined amount above the predicted pressure then the controller determines a nozzle is clogged.
16. The method of claim 15 , wherein, the spray bar includes a manifold portion configured to receive the liquid input from the pump and a plurality of nozzles to eject the liquid.
17. The method of claim 15 , wherein determining the pressure of a liquid within the spray bar includes a pressure sensor located at each nozzle such that the specific clogged nozzle is identifiable.