DE587058C - Procedure for determining the content of dust or foreign bodies in liquids or gases - Google Patents
Procedure for determining the content of dust or foreign bodies in liquids or gasesInfo
- Publication number
- DE587058C DE587058C DES90275D DES0090275D DE587058C DE 587058 C DE587058 C DE 587058C DE S90275 D DES90275 D DE S90275D DE S0090275 D DES0090275 D DE S0090275D DE 587058 C DE587058 C DE 587058C
- Authority
- DE
- Germany
- Prior art keywords
- brush
- procedure
- machine
- light sources
- dust
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
- G01R31/343—Testing dynamo-electric machines in operation
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Motor Or Generator Current Collectors (AREA)
Description
Verfahren zur Feststellung des Staub- oder Fremdkörpergehalts in Flüssigkeit oder Gasen Bei elektrischen Maschinen, insbesondere bei Einankerumformern, kann der Bürstenverschleiß etwa an den Schleifbürsten infolge ungünstiger Verhältnisse plötzlich sehr groß, werden, so daß Betriebsstörungen- auftreten, können. Diese Nachteile können nach der Erfindung dadurch vermieden werden, daß der Bürstenverschleiß an elektrischen Maschinen dadurch geprüft wird, daß die Luft an Stellen, an denen sie infolge des Bürstenverschleißes viel Bürstenstaub enthält, durchleuchtet wird, wobei also, wie dies an und für sich bereits bekannt ist, der Staubgehalt der Luft festgestellt wird. Hierzu werden mit besonderem Vorteil an der Maschine Lichtquellen mit zur Drehachse der Maschine parallelen Strahlenbündeln angeordnet. Hierbei empfiehlt es sich, die Lichtquellen in einer der Anzahl der Büfstenbolzen entsprechenden Zahl derart anzuordnen, daß scharf begrenzte Lichtstrahlenbündel in der Richtung der Maschinenachse vor der auflaufenden Bürstenkante jeder Bürste verlaufen. Im Falle einer selbstätigen Überwachung wird dann die Helligkeitsänderung dieser Lichtstrahlen mittels photoelektrischer Zellen zur Steuerung einer Anzeigevorrichtung oder einer selbsttätigen Abschalteinrichtung der Maschine herangezogen. Bei geringeren Ansprüchen genügt es, die Lichtstrahlen von Zeit zu Zeit zu überwachen, wobei ohne besondere Einrichtung an den Lichtstrahlen der Staubinhalt festgestellt werden kann. In. diesen Fällen brauchen die Lichtquellen nicht dauernd, sondern nur während der Dauer jeder Besichtigung eingeschaltet zu sein. Bei der Verwendung eines gekapselten Kommutators mit Schaulöchern wird eine derartige Beobachtung auch am Tage möglich sein.Procedure for determining the level of dust or foreign bodies in liquids or gases In electrical machines, especially in single armature converters, can the brush wear, for example on the grinding brushes, as a result of unfavorable conditions suddenly become very large, so that malfunctions can occur. These Disadvantages can be avoided according to the invention that the brush wear is tested on electrical machines that the air in places where it contains a lot of brush dust as a result of brush wear, is x-rayed, thus, as is already known in and of itself, the dust content of the air is detected. For this purpose, light sources are particularly advantageous on the machine arranged with beams parallel to the axis of rotation of the machine. Here recommends the light sources in a number corresponding to the number of brass studs to be arranged so that sharply delimited light beams in the direction of the Machine axis run in front of the brush edge of each brush. In the event of an automatic monitoring is then the change in brightness of these light beams by means of photoelectric cells for controlling a display device or a automatic shut-off device of the machine is used. With lower demands it is enough to monitor the light beams from time to time, with no special Facility at the light beams the dust content can be determined. In. this Cases do not need the light sources continuously, but only for the duration of each one Sightseeing to be turned on. When using an enclosed commutator Such an observation will also be possible during the day with peepholes.
Um bei der Messung von den Schwankungen der Lichtquelle oder auch der umgebenden Beleuchtung unabhängig zu werden, wird mit besonderem Vorteil die Helligkeit zweier gleichwertiger Lichtstrahlenbündel einer gemeinsamen Lichtquelle verglichen, von denen nur eines durch "die zu prüfende Luft geführt ist. Der Vergleich der beiden Lichtstrahlenbündel einer gemeinsamen Lichtquelle erfolgt hierbei vorteilhaft durch in zwei Zweige einer Brückenschaltung gelegte photoelektrische Zellen, z. B. durch Selenzellen.In order to measure the fluctuations of the light source or also Becoming independent of the surrounding lighting is particularly advantageous Brightness of two equal bundles of light rays from a common light source compared, of which only one is passed through "the air to be tested. The comparison of the two light beams from a common light source is advantageous here by placed in two branches of a bridge circuit photoelectric cells, e.g. B. by selenium cells.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES90275D DE587058C (en) | 1929-03-02 | 1929-03-02 | Procedure for determining the content of dust or foreign bodies in liquids or gases |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES90275D DE587058C (en) | 1929-03-02 | 1929-03-02 | Procedure for determining the content of dust or foreign bodies in liquids or gases |
Publications (1)
Publication Number | Publication Date |
---|---|
DE587058C true DE587058C (en) | 1933-10-28 |
Family
ID=7515695
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DES90275D Expired DE587058C (en) | 1929-03-02 | 1929-03-02 | Procedure for determining the content of dust or foreign bodies in liquids or gases |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE587058C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE941002C (en) * | 1940-08-27 | 1956-03-29 | Siemens Ag | Device for checking the operability of commutators and brushes of electrical machines |
-
1929
- 1929-03-02 DE DES90275D patent/DE587058C/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE941002C (en) * | 1940-08-27 | 1956-03-29 | Siemens Ag | Device for checking the operability of commutators and brushes of electrical machines |
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