CN202250554U - Impact type water turbine spray needle pressureless feedback device - Google Patents
Impact type water turbine spray needle pressureless feedback device Download PDFInfo
- Publication number
- CN202250554U CN202250554U CN2011203741695U CN201120374169U CN202250554U CN 202250554 U CN202250554 U CN 202250554U CN 2011203741695 U CN2011203741695 U CN 2011203741695U CN 201120374169 U CN201120374169 U CN 201120374169U CN 202250554 U CN202250554 U CN 202250554U
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- Prior art keywords
- feedback
- cylinder body
- nozzle
- nozzle needle
- displacement
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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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Abstract
The utility model discloses an impact type water turbine spray needle pressureless feedback device, which comprises a nozzle cylinder body (1), a spray needle (2), a spray needle shaft (3), a piston (4) and a displacement feedback taper sleeve (5). The spray needle (2), the spray needle shaft (3), the piston (4) and the displacement feedback taper sleeve (5) are arranged inside the nozzle cylinder body (1). The sidewall of the nozzle cylinder body (1) is provided with a feedback rod (6) perpendicular to the spray needle shaft (3). The lower end of the feedback rod (6) is provided with a roller (7). An oil-water isolation sleeve (8) is fixedly arranged between a water flow passage (1a) and an oil pressure operation chamber (1b). The displacement feedback taper sleeve (5) is arranged in a pressureless chamber (9) in the oil-water isolation sleeve (8). The roller (7) passing through the oil-water isolation sleeve (8) abuts against the displacement feedback taper sleeve (5). According to the above structure, the feedback rod is arranged in the pressureless chamber of the nozzle, so that no upward buoyancy is applied to the feedback rod. Meanwhile, the feedback rod is prevented from being disjointed from the stroke feedback taper sleeve. The impact type water turbine spray needle pressureless feedback device is high in precision and reliable in operation.
Description
Technical field
The utility model relates to the nozzle needle travel feedback device in the impulse turbine annex, particularly impulse turbine.
Background technique
The nozzle of impulse turbine is its inflow-rate of water turbine controlling mechanism, and is big or small with the flow of regulating nozzle directive rotary wheel of water turbine through the stroke of control nozzle needle.Existing nozzle stroke feedback means comprises mechanical lever-type and two kinds of the reaction types of pressure is arranged.Nozzle needle stroke mechanical feedback device is that the capable straight line motion with nozzle needle becomes approximate curvilinear motion through rocking arm, through the outer rocking arm of casing curvilinear motion is become approximate straight line motion again.The subject matter that exists is: complex structure, the jam phenomenon occurs easily; Through conversion repeatedly, error is bigger, can not be used for accurate computer control and remote-controlled operation.
Shown in Figure 1 for the nozzle needle stroke has the pressure feedback means, form by nozzle cylinder body 1, nozzle needle 2, nozzle needle axle 3, piston 4, Displacement Feedback tapered sleeve 5, feedback rod 6, roller 7, return spring 15, positioning bearing 11, positioning key 12, guide sleeve 13, Sealing etc.Nozzle needle 2, nozzle needle axle 3, piston 4, Displacement Feedback tapered sleeve 5 coaxial being installed in the nozzle cylinder body 1; Feedback rod 6 perpendicular to nozzle needle axle 3 is installed on the sidewall of nozzle cylinder body 1; Roller 7 is equipped with in the lower end of this feedback rod 6; Be set with return spring 15 on the feedback rod 6, guarantee that feedback rod 6 links to each other with Displacement Feedback tapered sleeve 5.The front portion of nozzle cylinder body 1 is provided with flow channel 1a, and the rear portion of nozzle cylinder body 1 is provided with hydraulic operation chamber 1b, and Displacement Feedback tapered sleeve 5 is contained in the 1b of hydraulic operation chamber, and roller 7 is against on the Displacement Feedback tapered sleeve 5.In addition, setting sleeve 14, hydraulic balance cover 10 etc. also are installed in the nozzle cylinder body 1.Nozzle needle axle 3 axis top is depicted as the schematic representation of nozzle needle full-gear, and the below is depicted as the schematic representation of nozzle needle complete shut-down state.
Though this feedback means has overcome the shortcoming of mechanical feedback device, because feedback rod 6 reaches in the 1b of hydraulic operation chamber, feedback rod 6 receives the buoyancy F=p of an oil pressure all the time
Oil pressure* d
2* π/4 cause feedback rod 6 and travel feedback tapered sleeve 5 to disconnect, and can't play the purpose of feedback nozzle needle stroke.Therefore, just must on feedback rod 6, be provided with one group and downward have more high-prestressed return spring 15 to overcome the buoyancy of oil pressure to feedback rod 6.Find in actual the use that more high-prestressed return spring 15 is easy to damage; And because spring fatigue is in the complete shut-down position through the nozzle needle 2 of being everlasting, when promptly roller 7 is in the lowest order of travel feedback tapered sleeve 5; Disconnect with travel feedback tapered sleeve 5; Make that feedback means can't feedback information, cause the computer erroneous judgement, make whole speed-adjusting and control system paralysis.
The model utility content
To above-mentioned defective, the utility model aim to provide a kind of simple in structure, precision is high, the nozzle needle stroke of reliable operation does not have the pressure feedback means.
For this reason; The technological scheme that the utility model adopted is: a kind of impulse turbine nozzle needle stroke does not have the pressure feedback means; Comprise nozzle cylinder body (1); And be installed in nozzle needle (2), nozzle needle axle (3), piston (4) and the Displacement Feedback tapered sleeve (5) in the nozzle cylinder body (1), and the feedback rod (6) perpendicular to nozzle needle axle (3) is installed on the sidewall of said nozzle cylinder body (1), roller (7) is equipped with in the lower end of this feedback rod (6); The front portion of said nozzle cylinder body (1) is provided with flow channel (1a); The rear portion of nozzle cylinder body (1) is provided with hydraulic operation chamber (1b), and key is: be installed with profit separation sleeve (8) between said flow channel (1a) and hydraulic operation chamber (1b), said feedback rod (6) links to each other with displacement transducer; The nothing that said Displacement Feedback tapered sleeve (5) is contained in the profit separation sleeve (8) is pressed in the chamber (9), and said roller (7) passes profit separation sleeve (8) and is against on the said Displacement Feedback tapered sleeve (5).
As preferably, be set with return spring (15) on the said feedback rod (6), further guarantee the feedback rod reliable operation.This return spring need not have more high-prestressed, and spring fatigue ruption can not occur.
The Displacement Feedback tapered sleeve is responsible for the Horizontal displacement of nozzle needle is transformed into the vertical displacement of feedback rod; Drive displacement transducer through feedback rod; Thereby the electrical signal that the straight-line displacement of nozzle needle accurately, directly is transformed into displacement transducer is transported to water turbine governing control system center, guarantees the normal operation of water turbine.Because feedback rod is arranged on the nothing of nozzle and presses in the chamber, does not just have the existence of oil pressure, feedback rod just can not receive buoyancy upwards, and feedback rod can not disconnect with the travel feedback tapered sleeve yet.
Working procedure or method for using are: when nozzle needle receives to move axially after the instruction of water turbine governing control system; How much what nozzle needle moved passes to displacement transducer exactly and changes electrical signal into through needle stem, travel feedback tapered sleeve, roller, the direct rigidity of feedback rod immediately; Feed back to water turbine governing control system center and computer center again; Tell the real displacement amount of speed governing center nozzle needle, the speed governing center judges whether that according to the electrical network situation needs carry out next step adjusting more again.
Beneficial effect is: on the one hand avoided the mechanical type feedback means jam phenomenon often to occur and feedback error bigger, can not be used for accurate computer control and remote operated shortcoming; Avoided pressing feedback means feedback rod and the disconnection of travel feedback tapered sleeve often to occur on the other hand; The purpose and the spring easy fatigue that can't reach feedback nozzle needle stroke are damaged; Make feedback means can not play the effect of feedback; Thereby cause the computer erroneous judgement, make the shortcoming of whole speed-adjusting and control system paralysis.This nozzle needle does not have the stroke of pressing feedback means can feed back nozzle needle fully effectively, reliably, be the normal operation of water turbine governing control system reliable assurance, have vast market prospect.
Description of drawings
Fig. 1 is that traditional nozzle needle stroke has the structural representation of pressing feedback means.
Fig. 2 is the structural representation of the utility model.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is described further:
Impulse turbine nozzle needle stroke as shown in Figure 2 does not have the pressure feedback means, is made up of nozzle cylinder body 1, nozzle needle 2, nozzle needle axle 3, piston 4, Displacement Feedback tapered sleeve 5, feedback rod 6, roller 7, positioning bearing 11, positioning key 12, guide sleeve 13, Sealing etc.Nozzle needle 2, nozzle needle axle 3, piston 4, Displacement Feedback tapered sleeve 5 coaxial being installed in the nozzle cylinder body 1; Feedback rod 6 perpendicular to nozzle needle axle 3 is installed on the sidewall of nozzle cylinder body 1; Roller 7 is equipped with in the lower end of this feedback rod 6, and feedback rod 6 links to each other with the displacement transducer (not shown).Feedback rod 6 is contained in the guide sleeve 13, and positioning bearing 11 is equipped with in the top of guide sleeve 13, between positioning bearing 11 and the feedback rod 6 positioning key 12 is housed.Nozzle needle 2 is fixedly mounted on the front end of nozzle needle axle 3, and piston 4 is fixedly mounted on the rear end of nozzle needle axle 3.The front portion of nozzle cylinder body 1 is provided with flow channel 1a, and the rear portion of nozzle cylinder body 1 is provided with hydraulic operation chamber 1b, and piston 4 is divided into two cavitys with hydraulic operation chamber 1b, two cavitys respectively with nozzle cylinder body 1 sidewall on the hydraulic fluid port of corresponding setting communicate.On the Displacement Feedback tapered sleeve 5 dress nozzle needle axles 3, roller 7 is against on the Displacement Feedback tapered sleeve 5.In addition, setting sleeve 14, hydraulic balance cover 10 etc. also are installed in the nozzle cylinder body 1.The above with background technique in introduce have and press the structure of feedback means identical, repeat no more at this.
Difference is: be installed with profit separation sleeve 8 between flow channel 1a and the hydraulic operation chamber 1b, profit separation sleeve 8 is provided with Sealing.Profit separation sleeve 8 surrounds one jointly with nozzle needle axle 3, setting sleeve 14, hydraulic balance cover 10 does not have pressure chamber 9.The nothing that Displacement Feedback tapered sleeve 5 is contained in the profit separation sleeve 8 is pressed in the chamber 9, and roller 7 passes profit separation sleeve 8 and is against on the Displacement Feedback tapered sleeve 5.Preferably be set with return spring 15 on the feedback rod 6.
The above is merely the embodiment of the utility model, does not limit to above-mentioned specific constructive form, and every simple deformation of doing according to the utility model all drops within the protection domain of the utility model.
Claims (2)
1. an impulse turbine nozzle needle stroke does not have the pressure feedback means; Comprise nozzle cylinder body (1); And be installed in nozzle needle (2), nozzle needle axle (3), piston (4) and the Displacement Feedback tapered sleeve (5) in the nozzle cylinder body (1); Feedback rod (6) perpendicular to nozzle needle axle (3) is installed on the sidewall of said nozzle cylinder body (1); Roller (7) is equipped with in the lower end of this feedback rod (6), and the front portion of said nozzle cylinder body (1) is provided with flow channel (1a), and the rear portion of nozzle cylinder body (1) is provided with hydraulic operation chamber (1b); It is characterized in that: be installed with profit separation sleeve (8) between said flow channel (1a) and hydraulic operation chamber (1b); Said feedback rod (6) links to each other with displacement transducer, and the nothing that said Displacement Feedback tapered sleeve (5) is contained in the profit separation sleeve (8) is pressed in the chamber (9), and said roller (7) passes profit separation sleeve (8) and is against on the said Displacement Feedback tapered sleeve (5).
2. do not have the pressure feedback means according to the described impulse turbine nozzle needle of claim 1 stroke, it is characterized in that: be set with return spring (15) on the said feedback rod (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203741695U CN202250554U (en) | 2011-09-29 | 2011-09-29 | Impact type water turbine spray needle pressureless feedback device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203741695U CN202250554U (en) | 2011-09-29 | 2011-09-29 | Impact type water turbine spray needle pressureless feedback device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202250554U true CN202250554U (en) | 2012-05-30 |
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ID=46111808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203741695U Expired - Lifetime CN202250554U (en) | 2011-09-29 | 2011-09-29 | Impact type water turbine spray needle pressureless feedback device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202250554U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103437935A (en) * | 2013-08-22 | 2013-12-11 | 广西平班水电开发有限公司 | Anti-reversing method of wheel blade feedback rod of movable propeller turbine and device adopted for same |
| CN113482833A (en) * | 2021-08-12 | 2021-10-08 | 中国华能集团有限公司 | Impulse turbine nozzle needle stroke measurement structure |
-
2011
- 2011-09-29 CN CN2011203741695U patent/CN202250554U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103437935A (en) * | 2013-08-22 | 2013-12-11 | 广西平班水电开发有限公司 | Anti-reversing method of wheel blade feedback rod of movable propeller turbine and device adopted for same |
| CN113482833A (en) * | 2021-08-12 | 2021-10-08 | 中国华能集团有限公司 | Impulse turbine nozzle needle stroke measurement structure |
| CN113482833B (en) * | 2021-08-12 | 2023-03-14 | 中国华能集团有限公司 | Impulse turbine nozzle needle stroke measurement structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120530 |