CN202284977U - Automatic detection device for nozzle sliding seal leakage - Google Patents
Automatic detection device for nozzle sliding seal leakage Download PDFInfo
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- CN202284977U CN202284977U CN2011204098424U CN201120409842U CN202284977U CN 202284977 U CN202284977 U CN 202284977U CN 2011204098424 U CN2011204098424 U CN 2011204098424U CN 201120409842 U CN201120409842 U CN 201120409842U CN 202284977 U CN202284977 U CN 202284977U
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Abstract
The utility model discloses an automatic detection device for nozzle sliding seal leakage. A water pressure balance sleeve (3) and an oil pressure piston (4) are fixedly sleeved on a spraying needle shaft (2). A pair of seal rings (5) are arranged respectively at intervals on a sliding face formed by the water pressure balance sleeve (3) and a nozzle cylinder body (1) and a sliding face formed by the oil pressure piston (4) and the nozzle cylinder body (1). A first discharge leakage channel (6) is disposed between the two seal rings (5) corresponding to the water pressure balance sleeve (3), and a second discharge leakage channel (7) is arranged between the two seal rings (5) corresponding to the oil pressure piston (4). The first discharge leakage channel (6) and the second discharge leakage channel (7) are connected with a leakage automatic detector (18) outside the nozzle cylinder body (1) after being joined through a discharge leakage outlet pipe joint (12). Due to the structure, the automatic detection device for nozzle sliding seal leakage is capable of accurately judging whether water pressure seal or oil pressure seal of nozzle seal is damaged or not, has the advantages of being accurate and quick in judging, and creates full and necessary conditions for unattended and remote control of power stations.
Description
Technical field
The utility model relates to hydro-electric power generating equipment, particularly impulse turbine nozzle technology field.
Background technology
At present; Slipper seal in the impulse water wheel machine nozzle comprises hydraulic pressure sealing and oil pressure sealing; The hydraulic pressure sealing realizes that through the O-ring seal on the slipping plane that is arranged on hydraulic balance cover and nozzle cylinder body the oil pressure sealing realizes through the O-ring seal on the slipping plane that is arranged on hydraulic piston and nozzle cylinder body.The hydraulic pressure sealing and the oil pressure sealing of all nozzles all do not have the Leakage Detection device.Whether the slipper seal in actual the use damages, and can't accurately judge, is fully to rely on the people to guess, let alone detects automatically.Find the nozzle needle of nozzle (can't switch) out of control like the power station, before the nozzle dismounting, do not know that fully what reason causes, can only rely on the people to go to guess like stuck the causing of nozzle needle; Even with the nozzle completely knocked down, because unloading process is destroyed the original state of problem, can only estimate probably also that at last certain reason causes, which road bad seals can't accurately determine the end is.Because it is inaccurate that the position that has problems is judged, causes the fault of power station nozzle disposablely to solve, often want repeated multiple times mounting or dismounting, test to solve, wasted great amount of time, influence the economic benefit in power station normal power generation and power station.
The utility model content
The purpose of the utility model provides a kind of nozzle slipper seal Leakage Detection device, can provide quick and accurate to judge to nozzle needle problem out of control, is that unmanned, the far distance controlled in power station created sufficient and necessary condition simultaneously.
For this reason; The technical scheme that the utility model adopted is: a kind of nozzle slipper seal Leakage Detection device; Comprise nozzle cylinder body (1) and be installed in nozzle needle axle (2), hydraulic balance cover (3) and the hydraulic piston (4) in the nozzle cylinder body (1); Said hydraulic balance cover (3) and hydraulic piston (4) are solidly set on the nozzle needle axle (2); On the slipping plane that said hydraulic balance cover (3) and nozzle cylinder body (1) constitute, respectively be arranged at intervals with a pair of O-ring seal (5) on the slipping plane that constitutes of hydraulic piston (4) and nozzle cylinder body (1); Key is: be provided with first row's leakage path (6) between two O-ring seals (5) of hydraulic balance cover (3) correspondence, between corresponding two O-ring seals (5) of hydraulic piston (4), be provided with second row's leakage path (7); The endpiece that leaks path (6) first row is equipped with row's leakage orifice plug (8); Said nozzle cylinder body (1) is outside equipped with Leakage Detection device (18); This Leakage Detection device (18) is formed by leaking liquid level box (18a), liquid level signal meter (18b) and sensing water content mixed in oil signal meter (18c), and said first, second row is leaked path (6,7) and linked to each other with leakage automatic detector (18) after spilling a mouthful pipe adapter (12) and converging through arranging.
First row is set between two O-ring seals of hydraulic balance cover correspondence to be leaked path, second row's leakage path is set between two O-ring seals of hydraulic piston correspondence; First, second row is leaked water or the oil that path leaks slipper seal; Converge the back and flow into the leakage liquid level box; Can obtain and judge the size of leakage rate through the liquid level signal meter of revealing automatic detector; Determining the end through sensing water content mixed in oil signal meter again is that oil leaks or water leaks, and the RST of comprehensive liquid level signal meter and sensing water content mixed in oil signal meter is judged whether this nozzle need overhaul again and is that leakage has taken place for the slipper seal at which position.
If what leak the liquid level box collection is water, then can get the hydraulic pressure bad seals of delivery nozzle, in conjunction with the size of leakage rate and the height of network load, whether decision need overhaul and when overhaul.If what leak the liquid level box collection is oil, then can get the oil pressure bad seals of delivery nozzle, need to shut down and handle; After the shutdown; At first speed regulator gives and cuts out chamber feeding oil pressure, opens the chamber oil extraction, and whether the leakage rate of leak check liquid level box increases; If any increase, explanation is that hydraulic piston closes the chamber bad seals; Whether speed regulator is given and is opened chamber feeding oil pressure then, closes the chamber oil extraction, open the chamber sealing and damage to confirm hydraulic piston.If above inspection is all normal, nozzle needle is also stuck can't switch, and explanation is a mechanical fault, is not sealing problem.
Being arranged on two O-ring seals between hydraulic balance cover and the nozzle cylinder body, is the working seal circle near the O-ring seal of spray nozzle front end, and another is a backup seal.When working seal circle operate as normal; When producing the micro-leakage that designing institute allows; This leakage rate can be leaked outside the path discharge nozzle cylinder body through first row; Can not produce back pressure, working seal circle with the back side of guaranteeing the working seal circle and under the environment of absolute ideal, work, backup seal is pressurized not, is in stand-by state; After the working seal circle damaged, through the leakage rate increasing of working seal circle, row is leaked orifice plug can not pass through so big leakage rate, just makes the malleation increase of backup seal naturally, and automatic replacement working seal circle, the state of devoting oneself to work are opened in backup seal lip limit.
Hydraulic piston is divided into the oil hydraulic cylinder of nozzle and closes the chamber and open the chamber; Be arranged on two O-ring seals between hydraulic piston and the nozzle cylinder body; Near the O-ring seal of closing the chamber hydraulic oil of closing the chamber is sealed; Near the O-ring seal of opening the chamber hydraulic oil of opening the chamber is sealed, when the O-ring seal operate as normal, when producing the micro-leakage that designing institute allows; This leakage rate can be leaked outside the path discharge nozzle cylinder body through second row, all can not produce back pressure, two O-ring seal work under absolute good environment with the back side of guaranteeing two O-ring seals.
Also be installed with profit spacer sleeve (10) in the said nozzle cylinder body (1); This profit spacer sleeve (10) is positioned between hydraulic balance cover (3) and the hydraulic piston (4) and surrounds nothing with nozzle needle axle (2) presses chamber (11), and said first, second row is leaked path (6,7) and after nothing pressure chamber (11) is converged, spilt a mouthful pipe adapter (12) and link to each other with said leakage automatic detector (18) through water conservancy diversion path (9), row again.The purpose that the profit spacer sleeve is set is to feed back tapered sleeve in order in not having the chamber of pressure, to install, and the nozzle needle stroke does not have the travel feedback bar of pressing feedback assembly and is against on the feedback tapered sleeve, collects nozzle needle axle run-length data accurately.
Be preferably, said first row's leakage path (6) is opened on hydraulic balance cover (3), and said second row is leaked path (7) by opening at the row's small opening (7a) of the piston on the hydraulic piston (4) and opening nozzle needle axle row's small opening (7b) formation on nozzle needle axle (2); Said water conservancy diversion path (9) is opened on profit spacer sleeve (6) and nozzle cylinder body (1).
For ease of arranging and conserve space, said first row's leakage path (6) is L-shaped, nozzle needle axle row's small opening (7b) is " U " shape, and piston row's small opening (7a) and water conservancy diversion path (9) are respectively perpendicular to nozzle needle axle (2).
The beneficial effect of the utility model: through leaking the signal that liquid level box, liquid level signal meter and sensing water content mixed in oil signal meter send; Combine to close the chamber again and open the logical respectively oil pressure inspection in chamber; Can judge accurately whether hydraulic pressure sealing or oil pressure sealing in the sealed nozzle damage, thereby judge whether to change immediately sealing and change any road sealing; Have accuracy of judgement, characteristics fast; In addition, leak path, the normal leakage amount that hydraulic pressure seals and oil pressure seals in time is discharged to outside the nozzle cylinder body, avoid the leakage rate accumulation to accelerate the damage of hermetically-sealed construction, thereby improve the reliability that seals, the serviceable life of prolongation O-ring seal through first, second row is set.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is described further:
Nozzle slipper seal Leakage Detection device as shown in Figure 1; Mainly, be installed in nozzle needle axle 2, hydraulic balance cover 3, hydraulic piston 4, the nozzle needle 16 in the nozzle cylinder body 1 and be arranged on the compositions such as leakage automatic detector 18 outside the nozzle cylinder body 1 by nozzle cylinder body 1.Revealing automatic detector 18 forms by leaking liquid level box 18a, liquid level signal meter 18b and sensing water content mixed in oil signal meter 18c.Hydraulic balance cover 3 is solidly set on the nozzle needle axle 2 with hydraulic piston 4, and hydraulic balance cover 3 is fitted together after can being provided with separately with nozzle needle axle 2, also can directly make an integral body.Nozzle needle 16 is contained in the front end of nozzle needle axle 2; Nozzle needle axle 2 axis top is depicted as the open mode of nozzle; The axis below is depicted as the closed condition of nozzle, and 2 axially-movables of nozzle needle axle drive hydraulic balance cover 3, hydraulic piston 4 and nozzle needle 16 and move together, from the open mode to the closed condition.
Form hydraulic pressure chamber 13 between hydraulic balance cover 3 and the nozzle needle 16; Hydraulic balance overlaps 3 single face pressurizeds; Be arranged at intervals with 5, two O-ring seals 5 of a pair of O-ring seal on the slipping plane that hydraulic balance cover 3 and nozzle cylinder body 1 constitute and be provided with in the same way, the face towards hydraulic pressure chamber 13 is a water plane.Hydraulic piston 4 is divided into the oil pressure chamber and closes chamber 14 and open chamber 15; Be arranged at intervals with a pair of O-ring seal 5 on the slipping plane that hydraulic piston 4 and nozzle cylinder body 1 constitute; Two O-ring seals 5 are provided with dorsad; Be positioned at the left side near the water plane of the O-ring seal of closing chamber 14 5, be positioned at the right side near the water plane of the O-ring seal 5 of opening chamber 15.Between every pair of O-ring seal 5, be provided with the row who communicates with nozzle cylinder body 1 external world and leak path; Leak path with hydraulic balance cover 3 corresponding rows and be called first row and leak path 6, leak path with hydraulic piston 4 corresponding rows and be called second row and leak path 7, be equipped with at the endpiece of first row's leakage path 6 and arrange leakage orifice plug 8.First, second row is leaked path 6,7 and after row spills mouthful pipe adapter 12 and converges, is linked to each other with leakage automatic detector 18.
As preferably, also be installed with profit spacer sleeve 10 in the nozzle cylinder body 1, this profit spacer sleeve 10 is between hydraulic balance cover 3 and hydraulic piston 4.Profit spacer sleeve 10 is kept apart oil pressure chamber and the hydraulic pressure chamber 13 in the nozzle needle cylinder body 1; Be provided with a cavity in the profit spacer sleeve 10; This cavity and nozzle needle axle 2 form one is not had the chamber 11 of pressure; Be convenient to arrange that the nozzle needle stroke does not have the pressure feedback assembly, the nozzle needle stroke does not have the feedback tapered sleeve 17 of pressing feedback assembly and is arranged on not have in the chamber of pressure 11 and with nozzle needle axle 2 and moves axially, and profit spacer sleeve 7 does not move axially with nozzle needle axle 2.
First arranges leakage path 6 opens on hydraulic balance cover 3, and leakage liquid warp first row on the slipping plane of hydraulic balance cover 3 and nozzle cylinder body 1 formation is leaked path 6 and flow in the nothing pressure chamber 11.Second arranges leakage path 7 constitutes by opening at the row of the piston on the hydraulic piston 4 small opening 7a and the nozzle needle axle row small opening 7b that opens on nozzle needle axle 2, and the leakage liquid on the slipping plane of hydraulic piston 4 and nozzle cylinder body 1 formation flows in the nothing pressure chamber 11 through piston row small opening 7a, nozzle needle axle row small opening 7b successively.Water conservancy diversion path 9 is opened on profit spacer sleeve 6 and nozzle cylinder body 1; Row spills the endpiece that mouthful pipe adapter 12 is contained in water conservancy diversion path 9; First, second row is leaked path 6,7 and after nothing presses chamber 11 to converge, is spilt mouthful pipe adapter 12 and be discharged among the leakage liquid level box 18a outside the nozzle cylinder body 1 through water conservancy diversion path 9, row again; Liquid level signal meter 18b and sensing water content mixed in oil signal meter 18c are installed in the both sides of leaking liquid level box 18a respectively; Liquid level signal meter 18b is used for the size of disconnected leakage rate, and sensing water content mixed in oil signal meter is used to judge leakage is oil, or water.
For ease of arranging and processing and manufacturing, first row leaks that path is 7 L-shaped, nozzle needle axle row small opening 7b is " U " shape, and piston row small opening 7a and water conservancy diversion path 9 are respectively perpendicular to nozzle needle axle 2.
Claims (4)
1. nozzle slipper seal Leakage Detection device; Comprise nozzle cylinder body (1) and be installed in nozzle needle axle (2), hydraulic balance cover (3) and the hydraulic piston (4) in the nozzle cylinder body (1); Said hydraulic balance cover (3) and hydraulic piston (4) are solidly set on the nozzle needle axle (2); On the slipping plane that said hydraulic balance cover (3) and nozzle cylinder body (1) constitute, respectively be arranged at intervals with a pair of O-ring seal (5) on the slipping plane that constitutes of hydraulic piston (4) and nozzle cylinder body (1); It is characterized in that: be provided with first row's leakage path (6) between two O-ring seals (5) of hydraulic balance cover (3) correspondence, between corresponding two O-ring seals (5) of hydraulic piston (4), be provided with second row's leakage path (7); The endpiece that leaks path (6) first row is equipped with row's leakage orifice plug (8); Said nozzle cylinder body (1) is outside equipped with Leakage Detection device (18); This Leakage Detection device (18) is formed by leaking liquid level box (18a), liquid level signal meter (18b) and sensing water content mixed in oil signal meter (18c), and said first, second row is leaked path (6,7) and linked to each other with leakage automatic detector (18) after spilling a mouthful pipe adapter (12) and converging through arranging.
2. according to the described nozzle slipper seal of claim 1 Leakage Detection device; It is characterized in that: also be installed with profit spacer sleeve (10) in the said nozzle cylinder body (1); This profit spacer sleeve (10) is positioned between hydraulic balance cover (3) and the hydraulic piston (4) and surrounds nothing with nozzle needle axle (2) presses chamber (11), and said first, second row is leaked path (6,7) and after nothing pressure chamber (11) is converged, spilt a mouthful pipe adapter (12) and link to each other with said leakage automatic detector (18) through water conservancy diversion path (9), row again.
3. according to the described nozzle slipper seal of claim 2 Leakage Detection device; It is characterized in that: said first row's leakage path (6) is opened on hydraulic balance cover (3), and said second row is leaked path (7) by opening at the row's small opening (7a) of the piston on the hydraulic piston (4) and opening nozzle needle axle row's small opening (7b) formation on nozzle needle axle (2); Said water conservancy diversion path (9) is opened on profit spacer sleeve (6) and nozzle cylinder body (1).
4. according to the described nozzle sliding pressure sealing of claim 3 mouth substituting device; It is characterized in that: said first row's leakage path (6) is L-shaped, nozzle needle axle row's small opening (7b) is " U " shape, and piston row's small opening (7a) and water conservancy diversion path (9) are respectively perpendicular to nozzle needle axle (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204098424U CN202284977U (en) | 2011-10-25 | 2011-10-25 | Automatic detection device for nozzle sliding seal leakage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204098424U CN202284977U (en) | 2011-10-25 | 2011-10-25 | Automatic detection device for nozzle sliding seal leakage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202284977U true CN202284977U (en) | 2012-06-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204098424U Expired - Lifetime CN202284977U (en) | 2011-10-25 | 2011-10-25 | Automatic detection device for nozzle sliding seal leakage |
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| Country | Link |
|---|---|
| CN (1) | CN202284977U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106918427A (en) * | 2017-04-28 | 2017-07-04 | 嘉兴学院 | A kind of experimental provision of real-time measurement oil sealing slip |
| CN108760168A (en) * | 2018-06-26 | 2018-11-06 | 哈尔滨工业大学（威海） | Test device for air tightness |
| CN109702906A (en) * | 2019-01-28 | 2019-05-03 | 江苏徐工工程机械研究院有限公司 | A kind of double monitoring chambers of cutting machine driving unit |
-
2011
- 2011-10-25 CN CN2011204098424U patent/CN202284977U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106918427A (en) * | 2017-04-28 | 2017-07-04 | 嘉兴学院 | A kind of experimental provision of real-time measurement oil sealing slip |
| CN106918427B (en) * | 2017-04-28 | 2023-06-13 | 嘉兴南湖学院 | Experimental device for real-time measurement oil blanket leakage rate |
| CN108760168A (en) * | 2018-06-26 | 2018-11-06 | 哈尔滨工业大学（威海） | Test device for air tightness |
| CN108760168B (en) * | 2018-06-26 | 2020-05-26 | 哈尔滨工业大学（威海） | Air tightness testing device |
| CN109702906A (en) * | 2019-01-28 | 2019-05-03 | 江苏徐工工程机械研究院有限公司 | A kind of double monitoring chambers of cutting machine driving unit |
| CN109702906B (en) * | 2019-01-28 | 2024-02-02 | 江苏徐工工程机械研究院有限公司 | Cutting machine driving unit double-monitoring cavity |
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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: 20120627 |