CN105697214A - Water turbine spray pipe capable of achieving buffered closing of needle tip - Google Patents
Water turbine spray pipe capable of achieving buffered closing of needle tip Download PDFInfo
- Publication number
- CN105697214A CN105697214A CN201610054764.8A CN201610054764A CN105697214A CN 105697214 A CN105697214 A CN 105697214A CN 201610054764 A CN201610054764 A CN 201610054764A CN 105697214 A CN105697214 A CN 105697214A
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- China
- Prior art keywords
- needle head
- piston
- flange
- jet pipe
- spray pipe
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B1/00—Engines of impulse type, i.e. turbines with jets of high-velocity liquid impinging on blades or like rotors, e.g. Pelton wheels; Parts or details peculiar thereto
- F03B1/04—Nozzles; Nozzle-carrying members
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- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Hydraulic Turbines (AREA)
- Nozzles (AREA)
Abstract
The invention provides a water turbine spray pipe capable of achieving buffered closing of a needle tip. The water turbine spray pipe comprises a nozzle head, a cylinder sleeve, a piston, a liquid inlet channel, a liquid outlet channel and a needle rod, wherein the nozzle head is provided with a nozzle; the nozzle head is connected with a water supply pipe through a spray pipe body; the spray pipe body is connected with a cavity seat provided with hydraulic cavities through rib plates arranged at intervals; the cylinder sleeve and the piston are fixed in the hydraulic cavities; the liquid inlet channel and the liquid outlet channel communicate with the hydraulic cavity in the front end of the piston and the hydraulic cavity in the rear end of the piston correspondingly; and one end of the needle rod is fixed to the piston, and the other end of the needle rod penetrates through the cylinder sleeve and is connected with the needle tip. The water turbine spray pipe is characterized in that the opposite surfaces of the piston and the cylinder sleeve are provided with a groove and a flange correspondingly; a throttling hole is formed in the flange; the outer main hydraulic cavity and the inner auxiliary hydraulic cavity are formed after the flange and the groove are connected in a matched mode; and the main hydraulic cavity communicates with the auxiliary hydraulic cavity through the throttling hole in the flange. The closing process of the needle tip is divided into a fast closing stage and a slow closing stage, so that the motion impact force and water hammer force of the needle tip are effectively reduced, safe operation of a machine set is guaranteed, and the service life of the spray pipe is prolonged.
Description
Technical field
The present invention relates to a kind of hydraulic turbine jet pipe, the hydraulic turbine jet pipe that especially a kind of needle head buffering is closed, belong to turbine technology field。
Background technology
Jet pipe is one of core component of Pelton wheel, it promotes the needle head in jet pipe to move back and forth by fluid pressure and realizes the unlatching of water jet, closedown or Flow-rate adjustment, and then regulate the discharge injecting rotary wheel of water turbine bucket through jet pipe, to change the size of hydraulic turbine output。When unit breaks down or other situation needs unit to stop operating, it is necessary to the current of quick closedown jet pipe injection。But closing the moment of jet pipe, effect of inertia due to needle head and hydraulic coupling, needle head and spout can be produced great impulsive contact force, simultaneously in jet pipe, the unexpected stopping of high-velocity flow can produce the water hammer that a water flow impact pressure suddenly increased namely is commonly called as in jet pipe and water inlet pipe, and the spout parts contacted all will be caused damage by the huge impulsive force of both。Therefore, it is necessary to prior art is improved。
Summary of the invention
It is an object of the invention to provide the hydraulic turbine jet pipe that a kind of needle head buffering is closed, when making needle head close first soon, slow afterwards, especially slowly closing is entered when terminal stage, thus reducing the impulsive contact force of needle head and water beats power, improve the safe and reliable property of jet pipe and water inlet pipe, increase the service life of unit。
The present invention is completed by following technical proposal: the hydraulic turbine jet pipe that a kind of needle head buffering is closed, including the nozzle head with spout, nozzle head is connected with feed pipe by jet pipe, jet pipe is connected with the chamber seat with hydraulic cavities by spaced gusset, it is fixed on the cylinder sleeve in hydraulic cavities and piston, respectively with piston before, entering of the hydraulic chamber into communication of rear end, liquid outlet channel, one end is fixed on piston, the needle stem that the other end is connected through cylinder sleeve with needle head, it is characterized in that setting groove and flange mutually on piston with cylinder sleeve face in opposite directions, flange is provided with throttle orifice, flange and groove form the main hydraulic cavities of outside and internal secondary hydraulic cavities after connecting, main, secondary hydraulic cavities is by the throttle orifice connection on flange, thus when shutdown, by to the hydraulic cavities injection pressure liquid of piston rear end, pressure liquid in main hydraulic cavities is discharged simultaneously and promote piston, needle stem and needle head quickly move to spout direction, until after the groove that sets mutually of piston and cylinder sleeve and flange connect, needle head is just limited by the lifting rate in secondary hydraulic cavities and drain age velocity and is slowly moved, thus effectively eliminating the generation of impulsive contact force and formation that water is beaten, protection spout parts safety。
Described groove is set to annular groove。
Described flange is set to convex annular pipe, and the length of convex annular pipe is specifically determined depending on the later stage translational speed of needle head, and the length of convex annular pipe is long, then the later stage translational speed of needle head is slow, otherwise, the length of convex annular pipe is short, then the later stage translational speed of needle head is fast。
Throttle orifice quantity on described flange and pore size, specifically determine depending on the translational speed of needle head, throttle orifice quantity is few, aperture is little, then the later stage translational speed of needle head is slow, otherwise, throttle orifice quantity is many, aperture big, then the later stage translational speed of needle head is fast。
Described flange outer wall is provided with the second annular groove, is provided with sealing ring in the second annular groove。
The present invention has following advantages and effect: adopt such scheme, easily needle head total travel quick closedown can be divided into two sections of closedowns, i.e. most stroke quick closedown section, to guarantee to close efficiency, the stroke of end fraction is slowly closing section,, under the premise meeting jet pipe discharge adjustment main performance, to effectively reduce needle head motion impulsive contact force and water hammer power, ensure unit safety operation。Present configuration is simple, reasonable, processing easy for installation, buffering effect is notable, makes the safety of jet pipe, reliability be largely increased, extend jet pipe and the service life of whole unit, in reality produces and power station uses, achieve good technology, economic benefit。
Accompanying drawing explanation
Fig. 1 is Pelton wheel jet pipe closed mode structure chart of the present invention；
Fig. 2 is Pelton wheel jet pipe opening structure chart of the present invention；
Fig. 3 is the A portion enlarged drawing in Fig. 1。
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described further。
The hydraulic turbine jet pipe that needle head provided by the invention buffering is closed, including the nozzle head 3 with spout 1, nozzle head 3 is connected with feed pipe 11 by jet pipe 5, jet pipe 5 is by spaced gusset 8 and band hydraulic cavities 6, the chamber seat of 13 is connected, it is water stream channel between gusset 8 outside the seat of chamber, in hydraulic cavities 6, 13 are provided with cylinder sleeve 4 and piston 7, also include respectively with piston 7 before, the hydraulic cavities 6 of rear end, entering of 13 connections, liquid outlet channel, one end is fixed on piston 7, the needle stem 17 that the other end is connected through cylinder sleeve 4 with needle head 2, piston 7 with cylinder sleeve 4 face in opposite directions are respectively equipped with groove 15 and flange 14, flange 14 is provided with throttle orifice 21, front hydraulic cavities 6 is divided into the main hydraulic cavities 22 of outside and the secondary hydraulic cavities 18 of inside by flange 14 and groove 15 after connecting, main, secondary hydraulic cavities 22, 18 are connected by the throttle orifice 21 on flange 14；Described groove 15 is arranged on cylinder sleeve 4, is specifically set to annular groove；Described flange 14 is arranged on piston 7, is specifically set to convex annular pipe, and the length of convex annular pipe is specifically determined depending on the later stage translational speed of needle head 2, the length of convex annular pipe is long, then the later stage translational speed of needle head 2 is slow, otherwise, the length of convex annular pipe is short, then the later stage translational speed of needle head 2 is fast；Throttle orifice 21 quantity on described flange 14 and pore size, specifically determine depending on the translational speed of needle head 2, throttle orifice 21 quantity is few, aperture is little, then the later stage translational speed of needle head 2 is slow, otherwise, throttle orifice 21 quantity is many, aperture big, then the later stage translational speed of needle head 2 is fast；Described flange 14 outer wall is provided with the second annular groove 19, and being provided with sealing ring 20,16 in the second annular groove 19 is remaining liquid passing away。
During shutdown; by liquid inlet and outlet passage 10 or 12 to the hydraulic cavities 13 injection pressure liquid of piston 7 rear end; by liquid inlet and outlet passage 9, the pressure liquid in main hydraulic cavities 22 is discharged simultaneously and promote piston 7, needle stem 17 and needle head 2 quickly to move to spout 1 direction; until after the groove 15 of piston 7 and cylinder sleeve 4 and flange 14 connect; needle head 2 is just limited by the lifting rate in secondary hydraulic cavities 18 and drain age velocity and is slowly moved; thus effectively reducing impulsive contact force and water beats power, protect spout parts safety。
During start, only need to be rapidly injected pressure liquid by liquid inlet and outlet passage 9 in main hydraulic cavities 22, pressure liquid in the hydraulic cavities 13 of piston 7 rear end is discharged by liquid inlet and outlet passage 10 or 12 simultaneously, gets final product push piston 7, needle stem 17 and needle head 2 and quickly leaves spout 1,。
Claims (5)
1. the hydraulic turbine jet pipe that a needle head buffering is closed, including the nozzle head with spout, nozzle head is connected with feed pipe by jet pipe, jet pipe is connected with the chamber seat with hydraulic cavities by spaced gusset, it is fixed on the cylinder sleeve in hydraulic cavities and piston, respectively with piston before, entering of the hydraulic chamber into communication of rear end, liquid outlet channel, one end is fixed on piston, the needle stem that the other end is connected through cylinder sleeve with needle head, it is characterized in that setting groove and flange mutually on piston with cylinder sleeve face in opposite directions, flange is provided with throttle orifice, flange and groove form the main hydraulic cavities of outside and internal secondary hydraulic cavities after connecting, main, secondary hydraulic cavities is by the throttle orifice connection on flange。
2. the hydraulic turbine jet pipe that needle head according to claim 1 buffering is closed, it is characterised in that described groove is set to annular groove。
3. the hydraulic turbine jet pipe that needle head according to claim 1 buffering is closed, it is characterized in that described flange is set to convex annular pipe, the length of convex annular pipe is specifically determined depending on the later stage translational speed of needle head, and the length of convex annular pipe is long, and the later stage translational speed of needle head is slow；The length of convex annular pipe is short, then the later stage translational speed of needle head is fast。
4. the hydraulic turbine jet pipe that needle head according to claim 1 buffering is closed, it is characterized in that the throttle orifice quantity on described flange and pore size, specifically determining depending on the translational speed of needle head, throttle orifice quantity is few, aperture is little, and the later stage translational speed of needle head is slow；Throttle orifice quantity is many, aperture big, then the later stage translational speed of needle head is fast。
5. the hydraulic turbine jet pipe that needle head according to claim 1 buffering is closed, it is characterised in that described flange outer wall is provided with the second annular groove, is provided with sealing ring in the second annular groove。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610054764.8A CN105697214B (en) | 2016-01-27 | 2016-01-27 | The hydraulic turbine jet pipe that a kind of needle head buffering is closed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610054764.8A CN105697214B (en) | 2016-01-27 | 2016-01-27 | The hydraulic turbine jet pipe that a kind of needle head buffering is closed |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105697214A true CN105697214A (en) | 2016-06-22 |
| CN105697214B CN105697214B (en) | 2018-02-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610054764.8A Active CN105697214B (en) | 2016-01-27 | 2016-01-27 | The hydraulic turbine jet pipe that a kind of needle head buffering is closed |
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| Country | Link |
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| CN (1) | CN105697214B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109058021A (en) * | 2018-08-08 | 2018-12-21 | 湖南云箭集团有限公司 | A kind of impulse turbine |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1500011B2 (en) * | 1964-09-11 | 1974-05-22 | Escher Wyss Gmbh, 7980 Ravensburg | Relieved needle valve for a free jet turbine |
| SU1202847A1 (en) * | 1983-10-17 | 1986-01-07 | Научно-Исследовательский И Конструкторско-Технологический Институт Местной Промышленности Рсфср | Pneumatic percussion mechanism |
| CN2718248Y (en) * | 2003-12-22 | 2005-08-17 | 哈尔滨多能电力高技术有限公司 | Multi-nozzle pelton turbine |
| CN201080890Y (en) * | 2007-07-24 | 2008-07-02 | 昆明电机有限责任公司 | Hydroturbine DC jet tube feedback device |
| CN102418645A (en) * | 2011-12-23 | 2012-04-18 | 重庆水轮机厂有限责任公司 | Single-cavity self-control nozzle component for hydraulic power of impulse turbine |
| CN103851017A (en) * | 2012-11-30 | 2014-06-11 | 无锡市协新气动有限公司 | Hydraulic-cylinder annular-space buffer |
| CN204283709U (en) * | 2014-12-05 | 2015-04-22 | 峨眉山市驰骋机械制造有限公司 | The manipulation of Horizontal displacement two-chamber is without spring formula water turbine nozzle |
-
2016
- 2016-01-27 CN CN201610054764.8A patent/CN105697214B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1500011B2 (en) * | 1964-09-11 | 1974-05-22 | Escher Wyss Gmbh, 7980 Ravensburg | Relieved needle valve for a free jet turbine |
| SU1202847A1 (en) * | 1983-10-17 | 1986-01-07 | Научно-Исследовательский И Конструкторско-Технологический Институт Местной Промышленности Рсфср | Pneumatic percussion mechanism |
| CN2718248Y (en) * | 2003-12-22 | 2005-08-17 | 哈尔滨多能电力高技术有限公司 | Multi-nozzle pelton turbine |
| CN201080890Y (en) * | 2007-07-24 | 2008-07-02 | 昆明电机有限责任公司 | Hydroturbine DC jet tube feedback device |
| CN102418645A (en) * | 2011-12-23 | 2012-04-18 | 重庆水轮机厂有限责任公司 | Single-cavity self-control nozzle component for hydraulic power of impulse turbine |
| CN103851017A (en) * | 2012-11-30 | 2014-06-11 | 无锡市协新气动有限公司 | Hydraulic-cylinder annular-space buffer |
| CN204283709U (en) * | 2014-12-05 | 2015-04-22 | 峨眉山市驰骋机械制造有限公司 | The manipulation of Horizontal displacement two-chamber is without spring formula water turbine nozzle |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109058021A (en) * | 2018-08-08 | 2018-12-21 | 湖南云箭集团有限公司 | A kind of impulse turbine |
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| Publication number | Publication date |
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| CN105697214B (en) | 2018-02-02 |
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Address after: 650100 Kunming, Xishan District, Yunnan Spring Road, No. 349 Applicant after: Kunming Motor Factory Co Ltd Address before: 650100 Kunming, Xishan District, Yunnan Spring Road, No. 349 Applicant before: Harbin electric motor factory (Kunming) Co., Ltd. |
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