Apparatus for monitoring bearing temperature and for protecting bearing from overtemperature专利检索-地热异常地热能专利检索查询-专利查询网

Apparatus for monitoring bearing temperature and for protecting bearing from overtemperature

阅读：332发布：2020-07-06

专利汇可以提供Apparatus for monitoring bearing temperature and for protecting bearing from overtemperature专利检索，专利查询，专利分析的服务。并且A system for monitoring and protecting a bearing employs a temperature responsive thermistor spring biased against the outer shell of the bearing. The thermistor preferably has a positive temperature coefficient of resistivity with a threshold or anomaly temperature for example of approximately 300*F above which the thermistor changes from a low resistance to a high resistance mode. The change in resistance is sensed by a protection circuit and a switch is actuated upon overheating of the bearing. The thermistor is disposed in a probe which is slidably mounted in a sensor head. A spring located in the head biases the probe outwardly, the outward motion being limited by stop surfaces. The sensor head is mounted in a housing containing the bearing such that in the absence of the bearing the probe would extend into the bearing cavity. Insertion of the bearing cams the probe toward the sensor head leaving the probe in close thermal contact with the bearing structure.，下面是Apparatus for monitoring bearing temperature and for protecting bearing from overtemperature专利的具体信息内容。

权利要求

1. A bearing protection system comprising an outer shell of a bearing, a housing for mounting the bearing, the housing having an aperature in alignment with the outer shell, a sensor head mounted in the aperature, a bore located in the head in communication with the outer shell, the bore closed at one end, a first spring seat provided at the closed end, a probe movably mounted in the bore of the head, a second spring seat provided on the probe, means for biasing the probe into intimate heat transfer contact with the outer shell, the biasing means comprising a coil spring located between the first and second spring seats, a temperature responsive thermistor disposed in the probe adjacent an outer surface thereof, a source of power and a switch in series with the source of power, and circuit means responsive to an overtemperature condition of the thermistor to open the switch.

2. A bearing protection system comprising a source of power, a switch in series with the source of power, circuit means including a temperature responsive thermistor responsive to an overtemperature condition to open the switch, a head having first and second ends with a bore extending therebetween, the bore closed at one end, a first spring seat provided at the closed end, a probe having a tip slidingly disposed in the bore, a second spring seat provided on the probe, means biasing the probe tending to move it out of the head, the biasing means comprising a coil spring located between the first and second spring seats, means limiting the outward movement of the probe, the thermistor disposed in the tip of the probe, a bearing housing having a threaded aperature therein aligned with a bearing seat in the housing, the head being threaded and inserted in the housing aperature so that the probe tip is biased against a bearing disposed in the housing.

3. Apparatus according to claim 2 in which the thermistor has a positive temperature coefficient of resistance.

4. Apparatus according to claim 3 in which the thermistor has a threshold temperature of approximately 300*F.

5. Bearing temperature sensor apparatus comprising a sensor head having first and second ends with a bore extending therebetween, the bore threaded at one end, a threaded plug, the threaded plug received in the one end, a probe having a tip slidingly disposed in the bore, a first spring seat provided on the plug, a second spring seat provided on the probe, means biasing the probe tending to move it out of the head, the biasing means comprising a coil spring located between the first and second spring seats, means limiting the outward movement of the probe, a temperature responsive thermistor disposed in the tip of the probe, and means for mounting the head adjacent a bearing.

6. Apparatus according to claim 5 in which the means limiting the outward movement of the probe comprises stop surfaces formed in the bore of the head and on the probe.

7. Apparatus according to claim 5 in which the tip is formed with a cam surface so that when a bearing is slid into its seat the bearing cams the tip toward the head resulting in close thermal contact between the tip and the bearing.

8. Apparatus according to claim 5 in which the thermistor has a positive temperature coefficient of resistance.

9. Apparatus according to claim 8 in which the thermistor is composed of a doped barium titanate and is steeply sloped at temperatures above a threshold temperature.

10. Apparatus according to claim 6 in which the head and the probe are generally cylindrical, the stop surfaces on the head and probe are annular flanges formed by the junction between two different diameter portions on both the head and the probe.

11. Apparatus according to claim 5 in which the bore is threaded at one end and a threaded plug is received in the one end, a first spring seat is provided on the plug and a second spring seat is provided on the probe, the biasing means comprising a coil spring located between the first and second spring seats.

12. Apparatus according to claim 11 in which the plug is provided with a bore extending therethrough, the thermistor is provided with two leads which extend from the thermistor out through the head and the plug bore.

13. Apparatus according to claim 12 in which the probe has an aperture provided in the tip thereof, the thermistor is disposed in the aperture and the reamining portion of the aperture is filled with thermally conductive electrically insulation potting material.

14. Apparatus according to claim 9 in which the threshold temperature of the thermistor is approximately 300*F.

15. Apparatus according to claim 9 in which the threshold temperature of the thermistor is approximately 180*F.

说明书全文

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Apparatus for monitoring bearing temperature and for protecting bearing from overtemperature

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