US3878418A - Igniter plug - Google Patents
Igniter plug Download PDFInfo
- Publication number
- US3878418A US3878418A US437258A US43725874A US3878418A US 3878418 A US3878418 A US 3878418A US 437258 A US437258 A US 437258A US 43725874 A US43725874 A US 43725874A US 3878418 A US3878418 A US 3878418A
- Authority
- US
- United States
- Prior art keywords
- electrode
- elongated
- metal shell
- insulator
- angled surface
- 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
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/26—Starting; Ignition
- F02C7/264—Ignition
- F02C7/266—Electric
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T13/00—Sparking plugs
- H01T13/54—Sparking plugs having electrodes arranged in a partly-enclosed ignition chamber
Definitions
- ABSTRACT An igniter plug for a turbine engine which has increased life and improved ignition capabilities.
- the igniter plug is characterized by an angled end portion which extends into a combustion chamber of a turbine engine.
- the angled end of the plug fits the contour of the combustion chamber, to permit freer flow of gases past the plug tip while at the same time allowing maximum projection and exposure of the spark into the combustible mixture.
- This invention relates to a spark discharge device for igniting combustible materials and more particularly to an improved igniter plug for igniting fuel in a turbine or jet engine. This invention is most particularly related to the novel configuration of the electrical discharge end of the igniter plug that ignites combustible gases.
- lgniter plugs generally comprise a metal shell or body that has a flange or other mounting means for mounting the igniter plug in a ttlrbine engine.
- the shell constituting one electrode of the igniter plug.
- a central electrode passes through the shell and is supported by an insulator which surrounds the central electrode and which is fitted into an opening in the metal shell.
- a copper packing ring or bushing is then provided between the insulator and the shell in order to seal the opening in the body. through which the insulator extends. against escape of gases.
- One example of a prior art igniter plug may he found in U.S. Pat. No. 3.745.400 entitled lgniter Plug issued July l0. 1973 to H. P. Meyer. hereby expressly incorporated by reference.
- the igniter plug is mounted so that the discharge end that supplies the electric discharge to ignite the fuel extends into the combustion chamber of the engine. Because of the extremely high temperatures encountered during combustion of the gases and the impingement of the rapidly flowing gases on the spark plug. the discharge end of the spark plug wears away until the spark plug is no longer capable of igniting fuel in the engine.
- This invention provides an improved igniter plug for turbine or jet engines that has an increased life span and is more effective in igniting fuel in the engine.
- the invention is an igniter plug characterized by an angled surface at the discharge end of the igniter plug.
- the igniter plug comprises an inner elongated electrode (30) having a front portion (32). a rear portion and a central axis. a forward elongated insulator (80) disposed around the forward portion of said electrode (30): an intermediate elongated insulator (40) disposed around at least a rear portion of the electrode (30). the intermediate insulator (40) having a front portion and a rear portion; an outer elongated metal shell disposed around the electrode and electrically isolated therefrom by the forward (80) and intermediate (40) insulators.
- the metal shell (20) having a rear portion that has an opening therein and a front end portion (23) arranged to provide a spark gap with the end of the front portion (32) of the electrode the improvement wherein the front end of the spark plug terminates in an angled surface comprising: the front portion of the inner elongated electrode (30) which terminates in a first angled surface one end of the forward elongated insulator (80) which terminates in an angled surface (85) parallel to the first angled surface (35 and the forward end of the front end portion of the metal shell (20) which terminates in an angled surface (25) parallel to the first angled surface (35).
- the igniter plug comprises an elongated central electrode 30; an outer metal shell 20 which forms the second electrode; a forward insulator and a rear insulator 40.
- the central electrode 30 is generally comprised of an electrically conducting material so that when an electric potential is applied across the central electrode 30 and the outer shell electrode Zll. an arc discharge may be formed between the tip 32 of the inner electrode 30 and the surrounding portion 23 of the shell electrode 20.
- the end portion of the electrode 30 from which the spark discharge occurs is a cylindrically shaped end portion 32 that is of a much larger diameter than the rest of the electrode which contains therein one or more passages 3
- the end portion 32 of the electrode 30 terminates in an angled surface 35. makes an angle of about 30 with the central axis of the inner electrode 30.
- a ceramic insulator 40 Coaxially disposed around the central electrode 30 is a ceramic insulator 40 which electrically isolates the central electrode 30 from the outer shell electrode 20. To prevent any gases from escaping through the rear end of the spark plug (not shown). the rear end of the spark plug is sealed so that no gases may escape.
- a second forward ceramic insulator 80. having a shoulder 81. is also positioned within the shell 20 to prevent radial and axial movement of the control electrode 30 that might result in contact between the control electrode 30 and the shell electrode 20. hence preventing electrical short circuits.
- the insulator 80 has a rear portion and a front portion having an angled end surface that makes an angle of about 30 with the central axis of the electrode 30.
- the angled end surface 85 therefore provides an end surface having an inclination of about 30 to the main axis of the insulator and parallel with the end surface 35 of the electrode 30.
- the outer shell 20 includes a mounting flange (not shown] for mounting the igniter plug to a turbine engine: intake and exhaust ports 21 and 22 for allowing the entrance and exit of engine gases into the igniter plug to cool the electrode 30'. and a forward shell portion or cap 23 that is welded to the shell 20.
- the front portion of the shell includes an angled surface 25 that is parallel to the angled surface 35 of the inner electrode 30; and an opening that forms the discharge surface of the shell that together with the angled surface 35 of the control electrode 30 forms the discharge gap which when energized ignites the fuel.
- This cap 23 also has an internal angled surface 26 which mates with the angled surface 86 of the forward insulator 80.
- the last two pieces added to the assembly are the forward ceramic insulator 80 and then the shell cap 23 which is welded to shell 20 to retain the forward insulator in a position that isolates the central electrode 30 from the outer electrode 23.
- the shell 23 and the insulator 80 are now in 360 mated contact between surfaces 86 and 26.
- the cap 23 and insulator 80 are axially assembled with the same case as symmetrical parts. but provide an igniter with an inclined end surface.
- the igniter plug shown in its operating position wherein it extends through the outer wall 2 ofthe cornbustion chamber so that it is generally flush with the inner wall I of the combustion chamber of the engine. It is the inventor's belief that the angled or oblique end portion of the igniter plug which extends into the combustion chamber increases the effectiveness of the igniter plug and increases its life.
- the igniter plug is mounted so that the end surface 25 of the shell 20 is flush with the wall 2 of a combustion chamber.
- a spark plug of the type having an inner elongated electrode having a front portion. a rear portion. and a central axis; a forward elongated insulator disposed around the forward portion of said electrode; an intermediate elongated insulator disposed around at least the rear portion of said electrode; an outer elongated metal shell disposed around the electrode and electrically isolated therefrom by the forward and intermediate insulators.
- said metal shell having a front end portion arranged to provide a spark gap with the end of the front portion of said electrode.
- a spark plug comprising an inner elongated electrode having a cylindrically shaped front portion and a central axis; an elongated insulator means disposed around at least a portion of the electrode: an outer elongated metal shell disposed around the electrode and insulator means and electrically isolated from the electrode by said insulator means.
- said metal shell having an annular front portion arranged around the inner electrode to provide an annular spark gap with the end of the front portion of said electrode. and wherein the front end of said metal shell is equidistant at all adjacent points between the end of the inner electrode and the end of said metal shell the front end of said elongated electrode and the front end of said metal shell terminates in angled surfaces which are parallel to each other. with the front end of said metal shell extending beyond the adjacent front end of said inner electrode.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Spark Plugs (AREA)
Abstract
Description
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US437258A US3878418A (en) | 1974-01-28 | 1974-01-28 | Igniter plug |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US437258A US3878418A (en) | 1974-01-28 | 1974-01-28 | Igniter plug |
Publications (1)
Publication Number | Publication Date |
---|---|
US3878418A true US3878418A (en) | 1975-04-15 |
Family
ID=23735710
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US437258A Expired - Lifetime US3878418A (en) | 1974-01-28 | 1974-01-28 | Igniter plug |
Country Status (1)
Country | Link |
---|---|
US (1) | US3878418A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6597088B1 (en) * | 1999-08-05 | 2003-07-22 | Avb List Gmbh | Spark plug with pressure measuring device |
WO2009123482A1 (en) * | 2008-04-02 | 2009-10-08 | Radoslaw Pelka | Ignition spark combustion engines sparking plug |
US20130327013A1 (en) * | 2012-04-26 | 2013-12-12 | Snecma | Spark plug for combustion chamber of a gas turbine engine |
US10989144B2 (en) * | 2016-01-29 | 2021-04-27 | Arianegroup Sas | Injection element having an ignition device |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1037307A (en) * | 1911-08-10 | 1912-09-03 | Anthony S Pierrel | Spark-plug. |
US1192003A (en) * | 1914-08-31 | 1916-07-25 | Champion Ignition Co | Spark-plug. |
US1452054A (en) * | 1921-02-18 | 1923-04-17 | Christy A Propst | Spark plug |
US1540137A (en) * | 1921-08-08 | 1925-06-02 | William F Lautenschlager | Removable jacket for spark-plug electrodes |
US2693082A (en) * | 1951-04-04 | 1954-11-02 | Gen Motors Corp | Gas turbine fuel igniter |
US3745400A (en) * | 1972-03-23 | 1973-07-10 | Bendix Corp | Igniter plug |
-
1974
- 1974-01-28 US US437258A patent/US3878418A/en not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1037307A (en) * | 1911-08-10 | 1912-09-03 | Anthony S Pierrel | Spark-plug. |
US1192003A (en) * | 1914-08-31 | 1916-07-25 | Champion Ignition Co | Spark-plug. |
US1452054A (en) * | 1921-02-18 | 1923-04-17 | Christy A Propst | Spark plug |
US1540137A (en) * | 1921-08-08 | 1925-06-02 | William F Lautenschlager | Removable jacket for spark-plug electrodes |
US2693082A (en) * | 1951-04-04 | 1954-11-02 | Gen Motors Corp | Gas turbine fuel igniter |
US3745400A (en) * | 1972-03-23 | 1973-07-10 | Bendix Corp | Igniter plug |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6597088B1 (en) * | 1999-08-05 | 2003-07-22 | Avb List Gmbh | Spark plug with pressure measuring device |
WO2009123482A1 (en) * | 2008-04-02 | 2009-10-08 | Radoslaw Pelka | Ignition spark combustion engines sparking plug |
US20130327013A1 (en) * | 2012-04-26 | 2013-12-12 | Snecma | Spark plug for combustion chamber of a gas turbine engine |
US9413141B2 (en) * | 2012-04-26 | 2016-08-09 | Snecma | Spark plug for combustion chamber of a gas turbine engine |
US10989144B2 (en) * | 2016-01-29 | 2021-04-27 | Arianegroup Sas | Injection element having an ignition device |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: IGNITION PRODUCTS CORPORATION Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ALLIED-SIGNAL INC.;REEL/FRAME:005012/0079 Effective date: 19881231 Owner name: HOUSEHOLD COMMERCIAL FINANCIAL SERVICES, INC. Free format text: SECURITY INTEREST;ASSIGNOR:UNISON INDUSTRIES LIMITED PARTNERSHIP;REEL/FRAME:005012/0090 Effective date: 19890106 |
|
AS | Assignment |
Owner name: UNISON INDUSTRIES LIMITED PARTNERSHIP, 530 BLACKHA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:IGNITION PRODUCTS CORPORATION;REEL/FRAME:005164/0245 Effective date: 19890106 |
|
AS | Assignment |
Owner name: UNISON INDUSTRIES LIMITED PARTNERSHIP, A DE LIMITE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ALLIED-SIGNAL INC.;REEL/FRAME:005320/0613 Effective date: 19900416 Owner name: ALLIED-SIGNAL INC., A DE CORP. Free format text: MERGER;ASSIGNOR:ALLIED CORPORATION, A DE CORP.;REEL/FRAME:005320/0603 Effective date: 19870930 Owner name: ALLIED CORPORATION, A CORP. OF NY Free format text: MERGER;ASSIGNOR:BENDIX CORPORATION, THE, A DE CORP.;REEL/FRAME:005320/0593 Effective date: 19890609 |