| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 161 | Water cooled stator winding leak detector | US98782 | 1993-07-29 | US5325725A | 1994-07-05 | Harold C. Sanderson; Donald R. Albright |
| A device for monitoring the leakage of cooling gas into the stator water cooling system is disclosed. The vent from the water cooling reservoir tank is connected to the inlet of a U-shaped passageway and the outlet of the passageway is connected to an atmospheric vent. A liquid is provided in the passageway so as to prevent the passage of cooling gas from the inlet to the outlet without a desired pressure differential. At the specified pressure differential however, gas bubbles from one side of the passageway to the other and is trapped by a measuring cup in one position. When a sufficient quantity of gas is passed under the cup, the buoyancy of the cup becomes positive allowing it to rise to a second position where at least a portion of the gas is discharged. Because the amount of gas discharged can be determined and a number of cycles of operation of the cup can be measured, the flowrate can be precisely measured. Appropriate electronic circuitry processes the electronic indications of cup operation to provide an electronic flowrate indication, an alarm indication should the flowrate exceed a predetermined amount and conditioning for computer storage and processing of flowrate information in preferred embodiments. | ||||||
| 162 | Method and apparatus for liquid cooled generator stator test and preparation therefor | US744880 | 1991-08-14 | US5287726A | 1994-02-22 | Hugh C. Burritt |
| Method and apparatus for preparing stators of a fluid cooled generator for ground (megger) and other tests. The method of automatically cycling into stator cooling coils gradually incremented pressures of super-desiccated air followed by subsequent rapid blowdown literally urges pockets of moisture out of the coils, freeing them by staccotic erosion or deterioration, as droplets and vapor. The process is carried out through the use of a palletized vacuum subsystem and conditioned air treatment/pressurization subsystem which includes a panel containing relay control logic for semi-automatic/automatic conduct of the testing protocol and including essentially relay logic, an air compressor with necessary valving, air filtration and drying apparatus, a receiver which affords storage of the treated, dried air and a sequencing valve with adjunct equipment for connection of the receiver output to the stator-under-test. Also included is an off-pallet valve of the butterfly type which functions as the blowdown sequencing valve and is fixed to the outlet portion of the stator network which is undergoing purge/test. | ||||||
| 163 | Method and apparatus for determining generator ventilation system failure using two differential pressure sensors | US179098 | 1988-04-08 | US4870393A | 1989-09-26 | Owen R. Snuttjer; Peter L. Wilhelm |
| The ratio of the pressure change across a portion of the ventilation system of a hydrogen cooled electric power generator to the pressure increase across a reference blower, preferably the purity blower, is compared to a base ratio to generate an alarm when the difference in ratios exceeds a predetermined amount indicative of a failure within the ventilation system. | ||||||
| 164 | Apparatus for ventilating an electric motor for textile spinning mill machines | US130087 | 1987-12-08 | US4853566A | 1989-08-01 | Friedrich Dinkelmann; Horst Wolf |
| In a self-ventilated electric motor such as utilized in a textile spinning mill machine, a fan cowling and cover plate are arranged to define a ventilating air flow pathway by respective support members which are disposed entirely outside the pathway to prevent accumulation of lint and debris on the support members. | ||||||
| 165 | Diagnostic apparatus for an electric generator seal oil system | US821369 | 1986-01-17 | US4792911A | 1988-12-20 | Avelino J. Gonzalez; Kurt H. Steinebronn; Michael J. Rasinski; Owen R. Snuttjer |
| A conventional hydrogen-cooled electric generator having gland seals prevents the escape of hydrogen gas from the generator housing. A conventional seal oil system provides the gland seals with the necessary oil so as to perform their sealing function. Diagnostic apparatus is provided for the arrangement and includes a plurality of sensors which provide output signals indicative of certain parameters such as temperatures and pressures throughout the seal oil system. The output signals are provided to a diagnostic computer which, in a preferred embodiment, utilizes an expert system diagnostic routine for examining the sensor signals and deriving certain conclusions relative to the operating condition of the seal oil system. Various conclusions are additionally reached using operator-entered information from off-line sensors. | ||||||
| 166 | Apparatus for monitoring hydrogen gas leakage into the stator coil water cooling system of a hydrogen cooled electric generator | US876562 | 1986-06-20 | US4766557A | 1988-08-23 | Michael Twerdochlib |
| Apparatus which provides an indication of gas leakage from the interior of an electric generator into a closed circuit water-cooling system for the generator's stator coils. The closed circuit water-cooling system includes a water tank for degasification with the closed volume above the water level being occupied by a gas of the same type as the generator interior. Sensors are provided for obtaining indications of pressure, temperature and volume of the gas, and from these indications the number of moles of gas in the tank are calculated in periodic time increments. The gas is maintained within certain pressure limits by the addition or venting of gas, and if an addition or venting has taken place from one calculation to a next, a projected value for the number of moles is calculated after the change, had the change not occurred. The difference between the actual and projected value is then added onto subsequent calculated values to obtain a history of gas leakage. | ||||||
| 167 | Generator stator winding diagnostic system | US755513 | 1985-07-16 | US4698756A | 1987-10-06 | Avelino J. Gonzalez; Franklin J. Murphy; Franklin T. Emery; Perry A. Weyant; William G. Craig |
| A diagnostic system for an electrical generator winding which has first and second passages for conduction of cooling gas. The temperature of the gas exiting the passages is determined and converted to a normalized value which may be either high, low or normal. A diagnostic computer determines the existence of predetermined combinations of high, low or normal for the two readings and these predetermined combinations are utilized by the computer which generates respective confidence factors in the existence of certain abnormal generator conditions such as open conductors, broken or blocked cooling gas passages, and sensor malfunctions, by way of example. | ||||||
| 168 | Current/flow comparator | US942478 | 1978-09-15 | US4190829A | 1980-02-26 | Nickolas Schmitt; Sterling C. Barton; Lawrence E. Jordan |
| A current/flow comparator for generating an alarm signal whenever the instantaneous flow rate of a coolant fluid cooling the armature of a dynamoelectric machine falls below a predetermined percentage of a desired instantaneous flow rate, which desired flow rate varies as a function of the square of the instantaneous current flowing through the armature, is disclosed. | ||||||
| 169 | Particulate enhancement for generator condition monitors | US873341 | 1978-01-30 | US4160908A | 1979-07-10 | D. Colin Phillips |
| In a hydrogen cooled dynamoelectric machine, an ion chamber detector monitors thermally produced particulates. The sensitivity of the ion chamber detector is improved by incorporating a particulate enhancement section upstream from the ion chamber detector. The particulate enhancement section has included therein a platinum surface over which the gaseous carrier flows increasing the number of submicron particulates entrained in the gaseous carrier. | ||||||
| 170 | Protecting electrical apparatus with gas generating compounds | US751403 | 1976-12-16 | US4149161A | 1979-04-10 | David C. Phillips; James D. B. Smith |
| Electrical apparatus cooled with a stream of hydrogen gas is protected from overheating by applying a coating to a portion of the apparatus which is exposed to the gas stream. The coating contains a compound which decomposes between 80.degree. and 200.degree. C. to produce a gas detectable by a monitor. The monitor detects gases heavier than hydrogen in the gas stream and sounds an alarm when they are present. | ||||||
| 171 | Method and device for measuring moisture in electric machines | US822798 | 1977-08-08 | US4139057A | 1979-02-13 | Jurgen Klaar |
| System for preventing moisture precipitation at sensitive machine parts and for measuring moisture to determine leaks within the housing of an electric machine in which the winding is cooled with water and in which a gas stream cooled by a heat exchanger is circulated within the housing. The gas circulating within the housing is passed in contact with a heat sink maintained at a temperature below any machine part within the housing. This precipitates moisture from the gas. The gas which is returned for cooling the machine parts has a low dew point which does not permit precipitation of moisture on the sensitive machine parts which are at a higher temperature. In addition recirculation of the cooled gas is continued until the moisture conditions in the circulating gas are stable or steady. Moisture conditions in the gas are then measured to determine fluctuations which indicate leakage of moisture into the housing. | ||||||
| 172 | Ventless equipment protection casing | US3699368D | 1970-05-07 | US3699368A | 1972-10-17 | PALMER KENNETH NORMAN |
| Equipment, particularly of an electrical nature, is protected against internal explosion and flame hazard by enclosing the equipment and separating the equipment space within the enclosure from an expansion space in the enclosure by a flame arrester. As an alternative, the expansion space can be defined by a body of porous foamed material in the enclosure.
|
||||||
| 173 | Electric pump assembly for use in pumping explosive or dangerous liquids | US3671152D | 1970-02-10 | US3671152A | 1972-06-20 | GUINARD PAUL ANDRE |
| THIS INVENTION RELATES TO AN ELECTRIC PUMP ASSEMBLY FOR USE IN PUMPING EXPLOSIVE OR DANGEROUS LIQUIDS IN CONTAINERS, THE ASSEMBLY COMPRISING A FLUID TIGHT CONTAINER, AN ELECTRIC PUMP MOUNTED WITHIN SAID CONTAINER, A PUMP LIQUID INLET WITHIN THE CONTAINER, AND A PUMP LIQUID OUTLET, THE PUMP COMPRISING AN ELECTRIC PUMP MOTOR, SAID ELECTRIC PUMP MOTOR INCLUDING A WINDING FOR SUBMERGING IN A LIQUID IN THE CONTAINER, SAID WINDING COMPRISING AT LEAST ONE WIRE, A COVERING INSULATING SAID WIRE, WHICH COVERING RESISTS THE LIQUID, SEALING MEANS THROUGH WHICH SAID WIRE EXTENDS WITHOUT DISCONTINUITY TO THE EXTERIOR OF THE CONTAINER, AND ELECTRIC POWER INPUT TERMINALS ON SAID WIRE.
|
||||||
| 174 | Multipart casing for an electrical machine | US3476963D | 1967-01-31 | US3476963A | 1969-11-04 | FELDHOFF HEINRICH; BECKER KLAUS; SCHLERETH GEORG |
| 175 | Leak indicator for liquid-cooled machines | US53802766 | 1966-03-28 | US3410102A | 1968-11-12 | OLAV KARSTEN |
| 176 | Electrical apparatus and machines for protection against fire and explosion hazards | US44323465 | 1965-03-29 | US3335323A | 1967-08-08 | URBAN MOLIN |
| 177 | Arrangement for indicating leakage between cooling systems of turbogenerators | US4565960 | 1960-07-27 | US3122668A | 1964-02-25 | ROBERT CUNY |
| 178 | Explosion-proof dynamoelectric machine | US12555749 | 1949-11-04 | US2594003A | 1952-04-22 | ELSE HARRY D; WEBER PAUL J |
| 179 | Explosion-proof dynamoelectric machine | US8585549 | 1949-04-06 | US2542016A | 1951-02-20 | ELSE HARRY D; FRITZ DWAIN E |
| 180 | Explosion-proof motor | US6911949 | 1949-01-04 | US2512136A | 1950-06-20 | BROWN STEFFEN S |
QQ群二维码
意见反馈
意见反馈