CN200975311Y - Chief axis centre hole air make-up arrangement - Google Patents
Chief axis centre hole air make-up arrangement Download PDFInfo
- Publication number
- CN200975311Y CN200975311Y CNU2006200358915U CN200620035891U CN200975311Y CN 200975311 Y CN200975311 Y CN 200975311Y CN U2006200358915 U CNU2006200358915 U CN U2006200358915U CN 200620035891 U CN200620035891 U CN 200620035891U CN 200975311 Y CN200975311 Y CN 200975311Y
- Authority
- CN
- China
- Prior art keywords
- valve
- tonifying
- main shaft
- central hole
- air admission
- 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 - Fee Related
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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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- Details Of Valves (AREA)
Abstract
The utility model discloses an air supply device for the center hole of the principal axis, and is composed of a gulp valve, a gulp valve bracket, a gulp valve base and a protecting cap sealing the valve. The utility model is characterized in that: the gulp valve is arranged on the gulp valve base, and the air outlet of the gulp valve is opposite the center hole of the electric motor principal axis; and the gulp valve base is fixedly arranged on the top end of the motor principal axis; the protecting cap sealing the valve is arranged on the outer shell of the electric motor at the outlet of the motor principal axis; the gulp valve base and the gulp valve bracket arranged above the gulp valve base are enclosed internally; an air inlet pipe and exhaust pipe are arranged on the wall of the protecting cap sealing the valve. The utility model can reduce the vacuum degree in the draft tube of the hydroturbine, and destroy the formation of the spiral vortex strip and pressure pulsation in the draft tube, cavitation and the shake of the machine frame and so on, thereby guaranteeing the safe and stable operation of the hydroturbine set.
Description
Technical field
The utility model relates to the mixed-flow wheel thermomechanical components, is specifically related to the empty making-up air device of a kind of Francis turbine alignment of shafts.
Background technique
In the prior art, Francis turbine has generally departed from the optimum operating condition operation when the rated load of 40%--60%, outlet of rotary wheel current tangential-velocity component increases, the circular rector that is had in the current makes the draft tube center produce low pressure and forms the whirlpool band, this whirlpool band spirality swing also causes Pressure Fluctuation in Draft Tube, usually cause the vibration of other parts of water wheels unit,, axle turbid as runner bucket vapour is phenomenons such as swing, fuselage rock, and occurs above phenomenon in the particularly large-scale mixed unit easily.
In the prior art, generally can making-up air device be installed to water turbine, as utilize buoyancy of water to prevent the water turbine center hole automatic air supply device of air supply passage backwater: to be provided with float type one-way valve and air supply passage, the float type one-way valve is serially connected on the air supply passage, and portion is placed with float within it, and this apparatus structure is simple relatively, but its restricted application, and reliability is not high, and particularly use is dangerous in Large Hydroelectric Set, can not guarantee the safe and stable operation of unit.
The model utility content
Technical problem to be solved in the utility model is how a kind of air admission to main shaft central hole device is provided, this device can reduce the degree of vacuum in the water turbine offgas duct, destroy rocking of the turbid and fuselage of the vapour of the formation of the spirality whirlpool band in the draft tube and pressure pulsation, runner etc., thereby guarantee the safe and stable operation of water wheels unit.
The technical problem that the utility model proposed is to solve like this: a kind of air admission to main shaft central hole device is provided, comprise aeration valve, tonifying Qi support, tonifying Qi valve seat and envelope valve guard shield, it is characterized in that: A, described aeration valve are arranged on the tonifying Qi valve seat, its exhaust outlet is over against the electric machine main shaft center hole, and described tonifying Qi valve seat is fixedly installed on the upper end of electric machine main shaft; B, described envelope valve guard shield are arranged on the casing of outside of electric machine main shaft outlet, and the tonifying Qi support of tonifying Qi valve seat and portion disposed thereon is enclosed in the inner chamber; The cover wall of C, described envelope valve guard shield is provided with suction tude and outlet pipe.
According to air admission to main shaft central hole device provided by the utility model, it is characterized in that the lower end of described envelope valve guard shield is provided with water spilage tray, water spilage tray is connected with the condensation waste pipe.
According to air admission to main shaft central hole device provided by the utility model, it is characterized in that, be provided with fluted disc speed measuring device on the top of tonifying Qi support.
According to air admission to main shaft central hole device provided by the utility model, it is characterized in that, described aeration valve, tonifying Qi valve seat, tonifying Qi support and fluted disc speed measuring device are rotating part, rotate with electric machine main shaft, described water spilage tray, condensation waste pipe, envelope valve guard shield, suction tude and outlet pipe position standing part, rotating part and standing part adopt labyrinth seal.
According to air admission to main shaft central hole device provided by the utility model, it is characterized in that the gross area of described suction tude is not less than described aeration valve orifice area.
Air admission to main shaft central hole device provided by the utility model, in the water turbine units low-load region, mend in draft tube by spindle hole, runner epicoele and to go into air, can reduce the degree of vacuum in the draft tube, destroy because the spirality whirlpool band that outlet of rotary wheel current tangential component causes, and phenomenons such as the fluctuation of the pressure pulsation that causes by this whirlpool band, load, waterpower resonance, thereby improve the running state of unit as swing, volute and the conduit pipe of axle system.
Description of drawings
Fig. 1 is an air admission to main shaft central hole apparatus structure schematic representation provided by the utility model.
Embodiment
Below in conjunction with accompanying drawing air admission to main shaft central hole device provided by the utility model is elaborated.
The air admission to main shaft central hole apparatus structure schematic representation that Fig. 1 is provided by the utility model, wherein, 1, aeration valve, 2, tonifying Qi valve seat, 3, the tonifying Qi support, 4, envelope valve guard shield, 5, suction tude, 6, outlet pipe, 7, water spilage tray, 8, the condensation waste pipe, 9, fluted disc speed measuring device, 10, electric machine main shaft, 11, motor housing, 12, labyrinth seal.Aeration valve 1 is arranged on the tonifying Qi valve seat 2, its exhaust outlet is over against electric machine main shaft 10 center holes, tonifying Qi valve seat 2 is fixedly installed on the upper end of electric machine main shaft 10, envelope valve guard shield 4 is arranged on the casing of electric machine main shaft 10 outlet end outsides, the tonifying Qi support 3 of tonifying Qi valve seat 2 and portion disposed thereon is enclosed in inside, the cover wall of envelope valve guard shield 4 is provided with suction tude 5 and outlet pipe 6, the lower end of envelope valve guard shield 4 is provided with water spilage tray 7, water spilage tray 7 is connected with condensation waste pipe 8, is provided with fluted disc speed measuring device 9 on the top of tonifying Qi support 3.
Air admission to main shaft central hole device provided by the utility model mainly is divided into standing part and rotating part, the rotation that links together of rotating part and electric machine main shaft mainly contains aeration valve 1, tonifying Qi valve seat 2, tonifying Qi support 3 and fluted disc speed measuring device 9 and various measuring device disposed thereon; Standing part has water spilage tray 7, envelope valve guard shield 4, suction tude 5 and outlet pipe 6 etc., adopt labyrinth seal at rotating part and standing part, the gap of labyrinth seal is axially lifted the machine amount and can be lifted the consideration of machine amount by unit according to installing and the unit operation needs are chosen the monolateral gap of 8-10 times of top guide bearing.Because the circulation of the hot air on the generator in the cover, the outer wall of water accumulation basin have the heavier dewfall imagination, enter the motor room for preventing dew, therefore be provided with water spilage tray sump is collected and drained into to condensation in the lower end of envelope valve guard shield; Will mend in water turbine and draft tube and go into air, intake pipe must be arranged, the gross area of this intake pipe should be less than the aeration valve orifice area, and total area of passage of waste pipe should be not less than 4～6 times that seal the area that leaks.
Adopt the cavitation corrosion zone tonifying Qi of air admission to main shaft central hole device provided by the utility model, can alleviate the cavitation erosion of runner, blade and the water distributor etc. of unit to water turbine.Reason is: on the one hand because tonifying Qi is improved the external pressure in the current, part cavitation corrosion steam bubble can not be expand on the value of its critical cavitation point, so just can not form the cavitation corrosion steam bubble that can destroy wetted surfaces, not have the generation of cavitation corrosion steam bubble just not have the formation of cavitation erosion.On the other hand, because the benefit of air has gone into to improve the characteristics such as density of current, reduced the impact force that can form the high-speed jet of steam bubble, do not reached certain impact force, the cavitation corrosion steam bubble also is difficult for forming.
Air admission to main shaft central hole device tonifying Qi provided by the utility model position is suitable, and it places the motor top, is not subjected to washing away of current, does not also influence runner and current are caused to squeeze etc., and its air compensation is big, and the tonifying Qi effect is very good.When the vacuum that forms in rotary wheel of water turbine cavity of resorption, the draft tube cone acquires a certain degree, under the suction of vacuum, aeration valve is opened automatically, extraneous air directly enters into the runner cavity of resorption by valve passage, spindle hole, thereby the whirlpool band in the destruction draft tube reaches the purpose that reduces unit vibration, noise and alleviate the cavitation of water turbine.When degree of vacuum is attenuated to a certain degree, aeration valve is shut automatically, no longer tonifying Qi in draft tube.
Claims (5)
1, a kind of air admission to main shaft central hole device comprises aeration valve, tonifying Qi support, tonifying Qi valve seat and envelope valve guard shield, it is characterized in that:
A, described aeration valve are arranged on the tonifying Qi valve seat, and its exhaust outlet is over against the electric machine main shaft center hole, and described tonifying Qi valve seat is fixedly connected on the upper end of electric machine main shaft;
B, described envelope valve guard shield are arranged on the casing of outside of electric machine main shaft outlet, and the tonifying Qi support of tonifying Qi valve seat and portion disposed thereon is enclosed in the inner chamber;
The cover wall of C, described envelope valve guard shield is provided with suction tude and outlet pipe.
2, air admission to main shaft central hole device according to claim 1 is characterized in that, the lower end of described envelope valve guard shield is provided with water spilage tray, and water spilage tray is connected with the condensation waste pipe.
3, air admission to main shaft central hole device according to claim 1 is characterized in that, is provided with fluted disc speed measuring device on the top of tonifying Qi support.
4, air admission to main shaft central hole device according to claim 1, it is characterized in that, described aeration valve, tonifying Qi valve seat, tonifying Qi support and fluted disc speed measuring device are rotating part, rotate with electric machine main shaft, described water spilage tray, condensation waste pipe, envelope valve guard shield, suction tude and outlet pipe position standing part, rotating part and standing part adopt labyrinth seal.
5, air admission to main shaft central hole device according to claim 1 is characterized in that, the gross area of described suction tude is not less than described aeration valve orifice area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200358915U CN200975311Y (en) | 2006-10-16 | 2006-10-16 | Chief axis centre hole air make-up arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200358915U CN200975311Y (en) | 2006-10-16 | 2006-10-16 | Chief axis centre hole air make-up arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200975311Y true CN200975311Y (en) | 2007-11-14 |
Family
ID=38901596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006200358915U Expired - Fee Related CN200975311Y (en) | 2006-10-16 | 2006-10-16 | Chief axis centre hole air make-up arrangement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200975311Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101813048A (en) * | 2010-05-18 | 2010-08-25 | 王文超 | Method and device for preventing machine lifting of water-turbine generator set |
-
2006
- 2006-10-16 CN CNU2006200358915U patent/CN200975311Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101813048A (en) * | 2010-05-18 | 2010-08-25 | 王文超 | Method and device for preventing machine lifting of water-turbine generator set |
| CN101813048B (en) * | 2010-05-18 | 2013-12-11 | 王文超 | Method and device for preventing machine lifting of water-turbine generator set |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071114 Termination date: 20101016 |