US2317812A - Governor apparatus - Google Patents
Governor apparatus Download PDFInfo
- Publication number
- US2317812A US2317812A US347908A US34790840A US2317812A US 2317812 A US2317812 A US 2317812A US 347908 A US347908 A US 347908A US 34790840 A US34790840 A US 34790840A US 2317812 A US2317812 A US 2317812A
- Authority
- US
- United States
- Prior art keywords
- lever
- trip
- pin
- metal
- shaft
- 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 - Lifetime
Links
- 239000002184 metal Substances 0.000 description 9
- 229910052751 metal Inorganic materials 0.000 description 9
- 230000002757 inflammatory effect Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 239000002360 explosive Substances 0.000 description 5
- 238000004880 explosion Methods 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 241001504505 Troglodytes troglodytes Species 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000007859 condensation product Substances 0.000 description 1
- -1 for example Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000012261 resinous substance Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
- F01D21/16—Trip gear
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/11—Tripping mechanism
- Y10T74/111—Speed controlled
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/21—Elements
- Y10T74/2101—Cams
- Y10T74/2107—Follower
Definitions
- My invention relates to an emergency or overspeed governor and it has for an object to provide apparatus of this character which is sparkless in operation and therefore safer in inflammatory or explosive media environments.
- the usual overspeed governor includes a me tallic weight or pin movable diametrally of the rotating shaft of the prime mover or turbine upon overspeeding to strike and trip a lever to close the throttle valve.
- the lever is made of metal and impact of the pin therewith involves metal-to-metal contact. While this arrangement is ordinarily satisfactory, yet, where the prime mover is rotated in an enclosure likely to have highly inflammatory or explosive media, as is the case with certain oil refineries, the hazard of re or explosion is encountered on account of sparking due to the metal-to-metal contact of the pin with the lever.
- the material may comprise, for example, linen or canvas impregnated with a suitable amorphous or resinous substance such as a phenolic condensation product.
- Such a material not only has the advantage of avoiding metal-to-metal contact and the consequent danger of sparking with the possibility of explosion, thereby making it possible to install fluid-operated prime movers in situations heretofore regarded as too hazardous, but installation may be effected without the cumbersome and expensive equipment to make it explosion-proof and the material has the ad' terial so as to avoid metal-to-metal contact and consequent sparking.
- Fig. 1 is a partial sectional view showing an overspeed trip mechanism with my improved structure
- Fig, 2 is an enlarged partial sectional view showing the trip lever
- Fig. 3 is a sectional view taken along the line III-III of Fig. 2. i
- I show an overspeed governing mechanism I U, mounted in a casing II, in which rotates a turbine shaft I2.
- a weight or trip pin I3 is carried in an opening I4 extending diametrally of the shaft I2.
- the weight has its center of gravity slightly offset from the axis of rotation and normally, it is held in place by a compression spring I 5 and a retainer I6.
- the Weight ilies out, it trips the arm I'I of the multiple arm lever I8 to release mechanism, at I9, to permit the spring 20 to close the throttle valve 2 I.
- lever arm I1 contacted by the pin I3 is made of suitable hard, wear-resisting, non-sparking, amorphous material.
- suitable hard, wear-resisting, non-sparking, amorphous material For this purpose, I prefer to use fabric, such as linen or canvas, im-
- this composite structure is preferably embodied as an insert or facing 22 for the lever arm I'I and positioned for contact by the pin.
- the insert or facing may be attached to the lever arm II in any suitable manner, I preferably provide the latter with a recess 23 open at the sides and having dovetail ends 24.
- the insert is formed with dovetail ends 25 to iit the recess ends 24; and, with the insert positioned in the recess, it isretained by lap plates 26 detachably secured to the sides of the lever arm.
- a shaft rotatable nor ⁇ - mally at a relatively high speed, trip mechanism including a lever disposed adjacent to the shaft and movable outwardly therefrom to release the mechanism and a pin carried by the shaft so as to be normally free of the lever but which, under the inence lof its centrifugal force,ris movable radially outward with respect to the shaft when the latter overspeeds to a predetermined extent to engage the lever and then, with continued repeatedly to move the latter the amount required to release the trip mechanism, said lever having a pin-contact facing comprised by a hard, tough,"wear,resisting and non-sparking material including fabric impregnated with a suitable synthetic resin.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Harvester Elements (AREA)
Description
M1121, 1943. y scam 2,317,812
GOVERNOR APPARATUS Filed Ju1y rev,l 19`4'o lwkwmq l 4 Wren ScHMm.
ATTORNEY` Patented Apr. 27, 1943 GOVERNOR APPARATUS Walter Schmid, Philadelphia, Pa., assignor to Westinghouse Electric & ManufacturingCompany, East Pittsburgh, Pa., a corporation of Pennsylvania Application July 27, 1940, Serial No. 347,908
(Cl. 'I4-3) 2 Claims.
My invention relates to an emergency or overspeed governor and it has for an object to provide apparatus of this character which is sparkless in operation and therefore safer in inflammatory or explosive media environments.
The usual overspeed governor includes a me tallic weight or pin movable diametrally of the rotating shaft of the prime mover or turbine upon overspeeding to strike and trip a lever to close the throttle valve. Usually the lever is made of metal and impact of the pin therewith involves metal-to-metal contact. While this arrangement is ordinarily satisfactory, yet, where the prime mover is rotated in an enclosure likely to have highly inflammatory or explosive media, as is the case with certain oil refineries, the hazard of re or explosion is encountered on account of sparking due to the metal-to-metal contact of the pin with the lever. While attempts have been made to alleviate this diiculty by making the trip lever of spark-resisting metal, for example, brass or other special metals, nevertheless, not only will these metals spark under certain conditions, but they are so soft that frequent replacement is required. Also, attempts have been made to meet the inflammatory and explosive condition by having the prime mover enclosed in a conduit communicating with space external to the inflammatory and explosion zone.
I have found that the foregoing objections may be overcome by making at least the contact portion of the trip lever of suitable hard and wearresisting non-metallic material to avoid metalto-metal contact and consequent sparking. The material may comprise, for example, linen or canvas impregnated with a suitable amorphous or resinous substance such as a phenolic condensation product. Such a material, not only has the advantage of avoiding metal-to-metal contact and the consequent danger of sparking with the possibility of explosion, thereby making it possible to install fluid-operated prime movers in situations heretofore regarded as too hazardous, but installation may be effected without the cumbersome and expensive equipment to make it explosion-proof and the material has the ad' terial so as to avoid metal-to-metal contact and consequent sparking.
These and other objects are effected by the invention as will be apparent from the following description and claims taken in connection with the accompanying drawing, forming a part of this application, in which:
Fig. 1 is a partial sectional view showing an overspeed trip mechanism with my improved structure;
Fig, 2 is an enlarged partial sectional view showing the trip lever; and,
Fig. 3 is a sectional view taken along the line III-III of Fig. 2. i
Referring now to the drawing more in detail, I show an overspeed governing mechanism I U, mounted in a casing II, in which rotates a turbine shaft I2. A weight or trip pin I3 is carried in an opening I4 extending diametrally of the shaft I2. The weight has its center of gravity slightly offset from the axis of rotation and normally, it is held in place by a compression spring I 5 and a retainer I6. When the Weight ilies out, it trips the arm I'I of the multiple arm lever I8 to release mechanism, at I9, to permit the spring 20 to close the throttle valve 2 I.
As heretofore pointed out, at least that portion of the lever arm I1 contacted by the pin I3 is made of suitable hard, wear-resisting, non-sparking, amorphous material. For this purpose, I prefer to use fabric, such as linen or canvas, im-
pregnated with a resin such as a phenolic conf densation product; andv this composite structure is preferably embodied as an insert or facing 22 for the lever arm I'I and positioned for contact by the pin.
While the insert or facing may be attached to the lever arm II in any suitable manner, I preferably provide the latter with a recess 23 open at the sides and having dovetail ends 24. The insert is formed with dovetail ends 25 to iit the recess ends 24; and, with the insert positioned in the recess, it isretained by lap plates 26 detachably secured to the sides of the lever arm.
While the invention has been shown in but one form, it will be obvious to those skilled in the art that it is not so limited, but is susceptible of various changes and modifications Without departing from the spirit thereof, and it is desired, therefore, that only such limitations shall be placed thereupon as are specifically set forth in the appended claims.
' What is claimed is:
l. In apparatus for use in inflammatory or explosive environments, a shaft rotatable norpredetermined extent to engage thel lever and p then, with continued outward radial movement, l0
f outward radial movement, to engage the lever to engage the lever repeatedly to move the latter the amount required to release the trip mechay resisting and nonsparking material including l fabric impregnated with a suitable synthetic resin.
2. In apparatus for use in inflammatory or explosive environments, a shaft rotatable nor`- mally at a relatively high speed, trip mechanism including a lever disposed adjacent to the shaft and movable outwardly therefrom to release the mechanism and a pin carried by the shaft so as to be normally free of the lever but which, under the inence lof its centrifugal force,ris movable radially outward with respect to the shaft when the latter overspeeds to a predetermined extent to engage the lever and then, with continued repeatedly to move the latter the amount required to release the trip mechanism, said lever having a pin-contact facing comprised by a hard, tough,"wear,resisting and non-sparking material including fabric impregnated with a suitable synthetic resin.
WALTER SCHMID.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US347908A US2317812A (en) | 1940-07-27 | 1940-07-27 | Governor apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US347908A US2317812A (en) | 1940-07-27 | 1940-07-27 | Governor apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
US2317812A true US2317812A (en) | 1943-04-27 |
Family
ID=23365801
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US347908A Expired - Lifetime US2317812A (en) | 1940-07-27 | 1940-07-27 | Governor apparatus |
Country Status (1)
Country | Link |
---|---|
US (1) | US2317812A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4040301A (en) * | 1975-03-27 | 1977-08-09 | Armand Rognon | Control device sensitive to speeds in excess of a pre-determined rotation speed |
US4195533A (en) * | 1977-04-06 | 1980-04-01 | Aktiengesellschaft Kuhnle, Kopp & Kausch | Operative members for use in a quick shut-off apparatus |
US4790049A (en) * | 1987-04-20 | 1988-12-13 | Grosh Jack F | Rope locking device |
-
1940
- 1940-07-27 US US347908A patent/US2317812A/en not_active Expired - Lifetime
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4040301A (en) * | 1975-03-27 | 1977-08-09 | Armand Rognon | Control device sensitive to speeds in excess of a pre-determined rotation speed |
US4195533A (en) * | 1977-04-06 | 1980-04-01 | Aktiengesellschaft Kuhnle, Kopp & Kausch | Operative members for use in a quick shut-off apparatus |
US4790049A (en) * | 1987-04-20 | 1988-12-13 | Grosh Jack F | Rope locking device |
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