Turbine unit for refrigerating/cooling air cycle
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F01D-005/14
F03D-011/00
F04D-029/38
F01B-025/26
F04B-017/00
출원번호
US-0064761
(2006-08-23)
등록번호
US-8215898
(2012-07-10)
우선권정보
JP-2005-243546 (2005-08-25)
국제출원번호
PCT/JP2006/316461
(2006-08-23)
§371/§102 date
20080225
(20080225)
국제공개번호
WO2007/023836
(2007-03-01)
발명자
/ 주소
Nakazeki, Tsugito
Ozaki, Takayoshi
Yamada, Hiroyuki
출원인 / 주소
NTN Corporation
대리인 / 주소
Osha • Liang LLP
인용정보
피인용 횟수 :
2인용 특허 :
8
초록▼
A compressor rotor 6a and a turbine rotor 7a are respectively attached at either end of the main shaft 13 so that the compressor rotor 6a is driven by the power generated by the turbine rotor 7a. The main shaft 13 is supported by rolling contact bearings 15 and 16 relative to the radial direction. T
A compressor rotor 6a and a turbine rotor 7a are respectively attached at either end of the main shaft 13 so that the compressor rotor 6a is driven by the power generated by the turbine rotor 7a. The main shaft 13 is supported by rolling contact bearings 15 and 16 relative to the radial direction. The thrust force applied to the main shaft 13 is supported by electromagnets 17. A sensor 18 is provided to detect the thrust force which affects the main shaft 13 through air within the compressor 6 and the expansion turbine 7. In the sensor 18, sensor elements having the properties changeable in accordance with a pressing force and capable to electrically detect the change in the properties are arranged in a circumferential direction of the main shaft. The sensor 18 detects the thrust force from the output of the sensor elements.
대표청구항▼
1. A turbine unit for refrigerating/cooling air cycle comprising a compressor,an expansion turbine,a main shaft,a rolling contact bearing for supporting the main shaft,an electromagnet for supporting part or the entirety of a thrust force applied to the main shaft,a sensor for detecting the thrust f
1. A turbine unit for refrigerating/cooling air cycle comprising a compressor,an expansion turbine,a main shaft,a rolling contact bearing for supporting the main shaft,an electromagnet for supporting part or the entirety of a thrust force applied to the main shaft,a sensor for detecting the thrust force and a controller for controlling a support force by the electromagnet in accordance with an output of the sensor,the compressor having a compressor rotor and the expansion turbine having a turbine rotor,the compressor rotor and the turbine rotor being attached to the main shaft so that the compressor rotor is driven by the power generated by the turbine rotor, or by a motor having a motor rotor attached to the main shaft,the sensor being interposed between a stationary outer ring of the rolling contact bearing and a spindle housing for supporting the stationary outer ring, andthe sensor including sensor elements arranged in a circumferential direction of the main shaft, each sensor element having the properties changeable in accordance with a pressing force urged thereupon and capable of electrically detecting the change in the properties, thereby to detect the thrust force from an output of the sensor elements,wherein the sensor includes a plurality of magnetostrictors or super magnetostrictors arranged in the circumferential direction of the main shaft and detects a permeability of the magnetostrictors or super magnetostrictors thereby to detect the thrust force, andwherein the plurality of magnetostrictors or super magnetostrictors are sandwiched between two yolk members made of a soft magnetic material. 2. The turbine unit for refrigerating/cooling air cycle according to claim 1, wherein the sensor includes a second yolk member placed between the two yolk members and made of a soft magnetic material slightly shorter than the magnetostrictors or super magnetostrictors. 3. The turbine unit for refrigerating/cooling air cycle according to claim 1, wherein the sensor includes a magnetostrictor or super magnetostrictor and a sensor coil arranged therearound, and detects the permeability of the magnetostrictor or super magnetostrictor by measuring the inductance of the sensor coil. 4. The turbine unit for refrigerating/cooling air cycle according to claim 3, wherein a plurality of sensor coils are provided so as to be connected in series so that the outputs of the sensor coils are averaged. 5. The turbine unit for refrigerating/cooling air cycle according to claim 4, wherein an even number of the sensor coils and the magnetostrictors or super magnetostrictors are provided in such a manner that electric currents flow through neighboring sensor coils in opposite directions. 6. The turbine unit for refrigerating/cooling air cycle according to claim 3, further comprising a condenser separate from the sensor, wherein the sensor utilizes resonance between the inductance of the sensor coil and the capacitance of the condenser to measure change in the inductance from the change in the resonant frequency, which changes in accordance with the change in the inductance. 7. The turbine unit for refrigerating/cooling air cycle according to claim 3, wherein the sensor includes an exciting coil arranged around the magnetostrictor or super magnetostrictor in addition to the sensor coil and supplies an alternating exciting current having a constant frequency and a constant amplitude through the exciting coil to detect the voltage induced across the sensor coil, thereby to measure the thrust force. 8. The turbine unit for refrigerating/cooling air cycle according to claim 1, wherein the sensor is a Hall sensor to detect the density of the magnetic flux, which changes together with change in the permeability of the magnetostrictor or super magnetostrictor in the sensor, thereby to measure the thrust force. 9. The turbine unit for refrigerating/cooling air cycle according to claim 1, wherein the sensor is interposed between the stationary outer ring of the rolling contact bearing and the spindle housing for supporting the stationary outer ring directly, or interposed therebetween via another member. 10. The turbine unit for refrigerating/cooling air cycle according to claim 9, further comprising a bearing housing with which the stationary outer ring of the rolling contact bearing is fixedly engaged, the bearing housing being engaged in an inner diametric hole provided in the spindle housing in such a manner as to be moveable in the axial direction, and the sensor being interposed between an end face of the bearing housing and the spindle housing or a member secured to the spindle housing. 11. The turbine unit for refrigerating/cooling air cycle according to claim 1, further comprising a first resilient element for applying a preload to the sensor. 12. The turbine unit for refrigerating/cooling air cycle according to claim 11, wherein the preload applied by means of the first resilient element is equal to or greater than the average thrust force which is applied to the main shaft through air within the compressor and the expansion turbine. 13. The turbine unit for refrigerating/cooling air cycle according to claim 11, further comprising a second resilient element, wherein a plurality of rolling contact bearings are provided, the sensor is arranged in the vicinity of one of the rolling contact bearings, other rolling contact bearings being disposed in such a manner as to be moveable in the axial direction relative to the spindle housing and elastically supported by the second resilient element. 14. The turbine unit for refrigerating/cooling air cycle according to claim 13, wherein the second resilient element is interposed between the stationary outer ring of the other rolling contact bearing and the spindle housing, between a member for securing the stationary outer ring of the other rolling contact bearing and the spindle housing, or between an inner ring of the other rolling contact bearing and the main shaft. 15. The turbine unit for refrigerating/cooling air cycle according to claim 13, wherein the second resilient element has a smaller spring constant than the first resilient element. 16. The turbine unit for refrigerating/cooling air cycle according to claim 1, wherein a plurality of thrust plates in flange form made of a ferromagnetic body are provided in the main shaft and a plurality of electromagnets are disposed in the spindle housing in face-to-face relation with opposite end faces of each thrust plate. 17. The turbine unit for refrigerating/cooling air cycle according to claim 16, wherein electromagnets are divided into a plurality of pieces aligned in the circumferential direction. 18. The turbine unit for refrigerating/cooling air cycle according to claim 17, wherein the number of poles, the size and the number of turns of a built-in coil among the individual pieces into which electromagnets are divided are set to be the same. 19. The turbine unit for refrigerating/cooling air cycle according to claim 1, wherein the sensor further includes: a second yolk member placed between the two yolk members and made of a soft magnetic material slightly shorter than the magnetostrictors or super magnetostrictors; anda sensor coil arranged around the magnetostrictors or super magnetostrictors,wherein the sensor detects the permeability of the magnetostrictors or super magnetostrictors by measuring the inductance of the sensor coil, andwherein the second yolk member is formed in ring shape and has a coil accommodating hole for accommodating the sensor coil with a space in between. 20. A turbine unit for refrigerating/cooling air cycle comprising a compressor,an expansion turbine,a main shaft,a rolling contact bearing for supporting the main shaft,an electromagnet for supporting part or the entirety of a thrust force applied to the main shaft,a sensor for detecting the thrust force and a controller for controlling a support force by the electromagnet in accordance with an output of the sensor,the compressor having a compressor rotor and the expansion turbine having a turbine rotor,the compressor rotor and the turbine rotor being attached to the main shaft so that the compressor rotor is driven by the power generated by the turbine rotor, or by a motor having a motor rotor attached to the main shaft,the sensor being interposed between a stationary outer ring of the rolling contact bearing and a spindle housing for supporting the stationary outer ring, andthe sensor including sensor elements arranged in a circumferential direction of the main shaft, each sensor element having the properties changeable in accordance with a pressing force urged thereupon and capable of electrically detecting the change in the properties, thereby to detect the thrust force from an output of the sensor elements,wherein the sensor includes a plurality of magnetostrictors or super magnetostrictors arranged in the circumferential direction of the main shaft and detects a permeability of the magnetostrictors or super magnetostrictors thereby to detect the thrust force, andwherein the turbine unit further comprises a permanent magnet magnetized in the direction of the thickness and provided on each of the magnetostrictors or super magnetostrictors in such a manner as to make direct contact with an end face thereof, the magnetostrictor or super magnetostrictor and the permanent magnet being sandwiched between two yolk members made of a soft magnetic material. 21. The turbine unit for refrigerating/cooling air cycle according to claim 20, further comprising a second yolk member placed between said two yolk members and made of a soft magnetic material slightly shorter than the total length of the magnetostrictor or super magnetostrictor and the permanent magnet, that are layered on top of each other. 22. A turbine unit for refrigerating/cooling air cycle comprising a compressor,an expansion turbine,a main shaft,a rolling contact bearing for supporting the main shaft,an electromagnet for supporting part or the entirety of a thrust force applied to the main shaft,a sensor for detecting the thrust force and a controller for controlling a support force by the electromagnet in accordance with an output of the sensor,the compressor having a compressor rotor and the expansion turbine having a turbine rotor,the compressor rotor and the turbine rotor being attached to the main shaft so that the compressor rotor is driven by the power generated by the turbine rotor, or by a motor having a motor rotor attached to the main shaft,the sensor being interposed between a stationary outer ring of the rolling contact bearing and a spindle housing for supporting the stationary outer ring, andthe sensor including sensor elements arranged in a circumferential direction of the main shaft, each sensor element having the properties changeable in accordance with a pressing force urged thereupon and capable of electrically detecting the change in the properties, thereby to detect the thrust force from an output of the sensor elements,wherein the sensor includes a magnetostrictor or super magnetostrictor and a sensor coil arranged therearound, and detects the permeability of the magnetostrictor or super magnetostrictor by measuring the inductance of the sensor coil, and further comprising a temperature sensor disposed in the vicinity of the magnetostrictor or super magnetostrictor and a corrector for correcting the results of measurement of the inductance or the permeability on the basis of the output of the temperature sensor. 23. A turbine unit for refrigerating/cooling air cycle comprising a compressor,an expansion turbine,a main shaft,a rolling contact bearing for supporting the main shaft,an electromagnet for supporting part or the entirety of a thrust force applied to the main shaft,a sensor for detecting the thrust force and a controller for controlling a support force by the electromagnet in accordance with an output of the sensor,the compressor having a compressor rotor and the expansion turbine having a turbine rotor,the compressor rotor and the turbine rotor being attached to the main shaft so that the compressor rotor is driven by the power generated by the turbine rotor, or by a motor having a motor rotor attached to the main shaft,the sensor being interposed between a stationary outer ring of the rolling contact bearing and a spindle housing for supporting the stationary outer ring, andthe sensor including sensor elements arranged in a circumferential direction of the main shaft, each sensor element having the properties changeable in accordance with a pressing force urged thereupon and capable of electrically detecting the change in the properties, thereby to detect the thrust force from an output of the sensor elements,wherein the sensor includes a plurality of pressure sensitive resistance elements and detects the change in the resistance value of the pressure sensitive resistance elements, andwherein the turbine unit further comprises a temperature sensor arranged in the vicinity of the pressure sensitive resistance elements and a corrector for correcting the resistance value of the pressure sensitive resistance elements on the basis of an output of the temperature sensor. 24. The turbine unit for refrigerating/cooling air cycle according to claim 23, wherein the detected values of the pressure sensitive resistance elements are averaged. 25. The turbine unit for refrigerating/cooling air cycle according to claim 23, wherein the sensor includes an elastic member for equalizing the pressure on a surface through which force is applied to the pressure sensitive resistance element. 26. A turbine unit for refrigerating/cooling air cycle comprising a compressor,an expansion turbine,a main shaft,a rolling contact bearing for supporting the main shaft,an electromagnet for supporting part or the entirety of a thrust force applied to the main shaft,a sensor for detecting the thrust force and a controller for controlling a support force by the electromagnet in accordance with an output of the sensor,the compressor having a compressor rotor and the expansion turbine having a turbine rotor,the compressor rotor and the turbine rotor being attached to the main shaft so that the compressor rotor is driven by the power generated by the turbine rotor, or by a motor having a motor rotor attached to the main shaft,the sensor being interposed between a stationary outer ring of the rolling contact bearing and a spindle housing for supporting the stationary outer ring, andthe sensor including sensor elements arranged in a circumferential direction of the main shaft, each sensor element having the properties changeable in accordance with a pressing force urged thereupon and capable of electrically detecting the change in the properties, thereby to detect the thrust force from an output of the sensor elements,wherein the sensor includes a plurality of strain gauges, andwherein the turbine unit further comprises a temperature sensor arranged in the vicinity of the strain gauges and a corrector for correcting the strain measured by the strain gauges on the basis of an output of the temperature sensor.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (8)
Andres Michael (Rockford IL) Coons Terry L. (Dayton OH), Air cycle machine with magnetic bearings.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.