Continuing with FIG. The staging of the combustor is critical to meet the engine operability needs, i.e., flameout margin, and emissions goals. compressor air for combustion. I came across a problem when calculating the compressor discharge temperature. Crankcase Temperature 105°-125° a. Additionally, improved steady-state compensation logic can be established in the ECU due to the constant k value, or ram recovery constant, and maximized thermal time constant. The sensor housing 30 is affixed onto the compressor casing 18 by suitable means, such as a plurality of bolts which screw into the compressor casing 18 through the mounting pad 26. When the temperature on the discharge tube exceeds the temperature indicative of a loss of charge, then the motor is stopped. The pyrometer 36 mounts over a second aperture at the outlet end 37 of the pyrometer in a low pressure area of the casing 18. 1 there is illustrated a cross-section of a prior art T3 sensing system 10, which includes a partial cross-section of a compressor 11. Privacy Policy Consequently, high pressure air from the compressor discharge flows into the T3 sensor 24 past the thermocouples 28, through the purge line 32, into the pyrometer 36, then back into the engine flow path 14 in the low pressure turbine, as indicated by arrows 38. About Us An on-off controller will cut power or disengage the clutch when the temperature passes the set-point. These sensors require access into the flow path through the compressor case. In accordance with the present invention, for a turbo-fan aircraft engine application, the T3 sensor 24 is mounted near the high pressure compressor discharge axial plane of the engine. By maintaining a constant Mach past the sensor, one of the variables is fixed. These objects and other features and advantages will become more readily apparent in the following description when taken in conjunction with the appended drawings. Browse our collection of air compressor accessory blogs. Max oil temperature = 251°F. Additionally, the relatively slow air velocity into the compressor discharge area causes the sensor to have a relatively long time constant. Pack temperature control: - up to 180C (385F): normal operation, - 180C to 220C (428F): the ram air inlet flap opens more in … Room temperature below 17 C(62 F). The compressor discharge temperature sensor signals the compressor outlet temperature to the ACSC for pack temperature control and overheat detection. The cause of this can be a faulty sensor, a faulty board, or an actual fault in the refrigerant lines (i.e. Compressor Inlet Temperature/ periphery of the nozzle tip. a purge line associated with an outlet of the sensor for venting the air to a sink pressure to be used as cooling and purge flow. This process is never ideal. A mounting means 16 is used to bolt or otherwise install the T3 sensor 12 to compressor casing 18 of a jet engine. blockage, kink, etc.). The T3 sensor means 24 is mounted to the compressor casing 18 on a mounting pad 26. The present invention has been developed to fulfill the needs noted above. (T5) sensor. An on-off controller will cut power or disengage the clutch when the temperature passes the set-point. The T3 sensing system 22 also provides purge flow for the pyrometer 36 site tube 42. Articles Therefore, through testing, a consistent k factor, i.e., ram recovery, can be established and input onto the ECU. This type of controller uses a latching relay, which must be manually reset, and is used to shut down a process when a certain temperature is reached. At that temperature on the discharge line you will have an internal compressor temperature of over 300°and the oil will begin breaking down, so if you check for no other reason, check to make sure you are under 225. 2, a T3 sensor system 22 having a T3 sensor means 24, is illustrated, in accordance with the present invention. First off, if your discharge temperature (as measured with a thermometer at the compressor) is over 225, you have an issue. means for sending an electrical signal from the at least one thermocouple to an electronic control unit capable of indicating the air temperature. 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