公开(公告)号：WO2015122949A3

公开(公告)日：2015-10-29

申请号：PCT/US2014066357

申请日：2014-11-19

Applicant: UNITED TECHNOLOGIES CORP

Inventor： RIBAROV LUBOMIR A ,  VEILLEUX LEO J JR ,  ELDER JAMES S JR

IPC: F02C7/18 ,  F01D25/12

CPC classification number: F02C7/18 ,  F01D11/24 ,  F01D15/005 ,  F01D25/12 ,  F02C7/14 ,  F02C7/222 ,  F02C9/18 ,  F04D29/321 ,  F05D2220/32 ,  F05D2240/307 ,  F05D2260/213 ,  Y02T50/671 ,  Y02T50/676

Abstract: In accordance with at least one aspect of this disclosure, a turbomachine cooling system includes a first low pressure port disposed in a low pressure portion of a turbomachine and a first high pressure port disposed in a high pressure portion of the turbomachine and in selective fluid communication with the first low pressure port via a cooling channel. The high pressure portion of the turbomachine is configured for a higher compression than the low pressure portion of the turbomachine where the first low pressure port is disposed. The cooling system can include a heat exchanger system disposed in the cooling channel such that a flow traveling from the first high pressure port to the first low pressure port is cooled by the heat exchanger system before traveling through the first low pressure port into the low pressure portion of the turbomachine.

Abstract translation: 根据本公开的至少一个方面，涡轮机冷却系统包括设置在涡轮机的低压部分中的第一低压端口和设置在涡轮机的高压部分中并且在选择性流体连通中的第一高压端口 通过冷却通道与第一低压端口连接。 涡轮机的高压部分构造成比设置有第一低压端口的涡轮机的低压部分更高的压缩。 冷却系统可以包括设置在冷却通道中的热交换器系统，使得从第一高压端口运动到第一低压端口的流量在通过第一低压端口进入低压之前被热交换器系统冷却 涡轮机的一部分。

公开(公告)号：CA2206917A1

公开(公告)日：1998-12-04

申请号：CA2206917

申请日：1997-06-04

Applicant: UNITED TECHNOLOGIES CORP

Inventor： VEILLEUX LEO J JR ,  REUTER CHARLES E

IPC: F02C9/30 ,  F02M37/04 ,  F02M37/08 ,  F04C14/22 ,  F04C14/26 ,  F02M59/20 ,  F02D41/14

Abstract: An electronic control for a variable delivery, positive displacement fuel pump includes a flow sensor located at the fuel outlet to the engine. The flow sensor provides a signal, indicative of actual fuel flow to the engine, to an electronic engine control. The electronic engine control compares actual fuel flow with desired fuel flow, and upon any difference therebetween commands an electrohydraulic servo valve to position a pump control actuator. The pump control actuator controls the amount of fuel delivered by the pump. Also, fuel flow upstream of the flow sensor is bypassed in a line to another section of the electrohydraulic servo valve. The electronic engine control commands a small amount of fuel to be bypassed back to the pump inlet during normal operating conditions. However, upon the occurrence of a transient condition, the electronic engine control causes more or less fuel to be bypassed back to the pump inlet. In this way, improved transient response of the pump is achieved by the electronic control of the present invention.