CN204628791U - Turbine governor valve valve rod and valve pocket - Google Patents
Turbine governor valve valve rod and valve pocket Download PDFInfo
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- CN204628791U CN204628791U CN201520096362.5U CN201520096362U CN204628791U CN 204628791 U CN204628791 U CN 204628791U CN 201520096362 U CN201520096362 U CN 201520096362U CN 204628791 U CN204628791 U CN 204628791U
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Abstract
The utility model discloses a kind of turbine governor valve valve rod and valve pocket, valve rod has a-quadrant, B region in valve pocket mating area section, and B region is in lower end, a-quadrant; Described a-quadrant is kinetic pressure balancing district, and described B region is hydrophobic region, and wherein a-quadrant is arranged on valve rod accounts for valve rod overall length 1/8 ~ 1/6 place by outlet end distance; Spacing between described a-quadrant and B region is 10 ~ 20mm; 1/6 ~ 1/5, the B peak width that a-quadrant width accounts for valve rod overall length accounts for 1/6 ~ 1/5 of valve rod overall length.Valve pocket is split type structure, and valve pocket and a-quadrant fitting area intersegmental part are equipped with the C region with dimpling or nick ultra-hydrophilic surface texture; The utility model can reduce friction, increase wear-resisting property, improves the stability of valve rod, to reach multi-stage sealed effect, by flow resistance effect, reduces steam leakage further.
Description
Technical field
The utility model relates to steam turbine accessory, is specifically related to a kind of turbine governor valve valve rod and valve pocket.
Background technique
Modulating valve is that the important vapour of joining of steam turbine performs original paper, is elevated regulates various inlet amount by regulating valve stem.Modulating valve runs for a long time in temperature high-pressure steam environment, requires that valve has good sealing property, stability, in case valve high-quality steam is leaked, causes loss in efficiency, even security incident occurs.
In actual motion, adopt Spielpassung between valve rod and valve pocket, its leakage is difficult to avoid.In order to reduce steam leakage, present employing solution many employings elastic filler or other high-abrasive material fillers reduce valve rod and valve pocket gap as far as possible, although play a role, have little effect, and causing stem wear more serious for a long time in the past, air leakage increases, poor reliability.Meanwhile, unstable air-flow is to the excitation force of valve rod, and make valve rod produce huge unidirectional impulsive load, cause valve rod partial wear, cause leakage rate to increase the weight of, time serious, valve rod even ruptures; There is violent flow resistance, flow velocity, pressure change at valve disc small guide vane during modulating valve work, it is violent that steam flow excitation makes valve disc vibrate, and passes to valve rod and drive it to vibrate.For improving wear-resisting property, present stage adopts solution mostly to adopt Surface hardened layer mode, improves the wear-resisting property of valve rod, although play a role, can not solve valve rod and valve pocket move in contact problem, effect has much room for improvement.
Regulating valve rod wearing and tearing and leakage have directly had a strong impact on steam turbine stability, reliability, Security and Economy, the maintenance cost of further adding users.
Summary of the invention
The utility model is for the deficiencies in the prior art.Propose a kind of turbine governor valve valve rod and valve pocket.
The utility model is to provide a kind of turbine governor valve valve rod.Valve rod B region is offered uniform micro-bulge or nick body super hydrophobic surface texture, not only can hold wear particle, increase wear-resisting property, under stream pressure effect, the water of steam-condensation is dredged rapidly valve rod A district hydrodynamic equilibrium region simultaneously, a-quadrant is in mating area between valve pocket and valve rod, and in valve pocket, condensed water can be evenly distributed on rapidly a-quadrant stem surface by region residing for ultra-hydrophilic surface texture and C region.Valve rod is continual reciprocation in valve pocket, valve rod is offered axially symmetrical kinetic pressure balancing groove, has and communicate with sealing liquid storage tank in compensating groove.According to hydrodynamic Elastic fluid theory, dynamic pressure can be set up in compensating groove inside and open effect, between valve rod and valve pocket, form complete fluid film lubrication, the vibration that balance valve rod is caused by unstable Airflow Exciting-Vibration Force, strengthen valve rod centring property, eliminate valve rod eccentric wear.The water condensate storage that the multi-stage valve rod sealing liquid storage tank simultaneously offered not only can will be dredged out from B region, for kinetic pressure balancing groove provides lubricant medium, can reach multi-stage sealed effect simultaneously, reduce steam leakage.
Another object of the present utility model is that providing package contains above-mentioned valve rod modulating valve, and comprises the super hydrophilic valve pocket of above-mentioned modulating valve.
The technical solution adopted in the utility model is:
A kind of turbine governor valve valve rod, valve rod has a-quadrant, B region in valve pocket mating area section, and B region is in lower end, a-quadrant; Described a-quadrant is kinetic pressure balancing district, and described B region is hydrophobic region, and wherein a-quadrant is arranged on valve rod accounts for valve rod overall length L 1/8 ~ 1/6 place by outlet end distance L4; Spacing L1 between described a-quadrant and B region is 10 ~ 20mm; 1/6 ~ 1/5, the B peak width B2 that a-quadrant width B 1 accounts for valve rod overall length accounts for 1/6 ~ 1/5 of valve rod overall length L.
The region surface in described kinetic pressure balancing district is provided with valve stem seal liquid storage tank, kinetic pressure balancing groove is provided with between two adjacent valve stem seal liquid storage tanks, kinetic pressure balancing groove is circumferentially uniform, and the kinetic pressure balancing groove between adjacent two valve stem seal liquid storage tanks is symmetrical vertically and be crisscross arranged; Described kinetic pressure balancing groove bottom is provided with drainage trough, and kinetic pressure balancing groove, drainage trough communicate with valve stem seal liquid storage tank;
Described kinetic pressure balancing groove is identical with drainage trough shape, and ratio is different; The height H of kinetic pressure balancing groove is 2 ~ 3mm, is 0.5 ~ 1mm with the width B 3 at the valve stem seal liquid storage tank place of communicating; The surface area of drainage trough account for kinetic pressure balancing rooved face long-pending 1/4 ~ 1/3; The groove depth h1 of kinetic pressure balancing groove and the groove depth h2 of drainage trough is 50 ~ 100 μm;
The pitch of grooves L2 of described valve stem seal liquid storage tank is 3 ~ 5mm; Groove depth h3 is 100 ~ 150 μm, and groove width B4 is 1 ~ 2mm.
Described hydrophobic region B region surface be provided with all with arrayed surface texture, described hydrophobic region Surface Texture is dimpling type or nick type Surface Texture; Described hydrophobic region Surface Texture texture spacing L3=15um ~ 55um, texture height h4=3um ~ 10um; The shape of described dimpling type is cylindrical protrusions, and nick type is cylinder shape groove.
Described kinetic pressure balancing groove is trigonometric form groove or U-type groove.
Described valve pocket is split type structure, and described valve pocket inside is equipped with ultra-hydrophilic surface texture; Described ultra-hydrophilic surface texture is dimpling type or nick type Surface Texture; Described ultra-hydrophilic surface texture texture spacing L3=15um ~ 55um, texture height h4=3um ~ 10um; The shape of described dimpling type is cylindrical protrusions, and nick type is cylinder shape groove; Described valve pocket and valve rod matching gap are 0.05 ~ 0.1mm;
Described water-wetted surface texture is annular concave platform surface in valve pocket, and concave station degree of depth h5 is than hydrophilic texture height or the high 10 ~ 20um of degree of depth h4, and its width is equal with water-wetted surface texture area width; Described annular concave platform and described water-wetted surface texture area form C region, present position, corresponding A region, present position, C region;
The width in described water-wetted surface texture C region is width B 1 and the twice valve rod travel sum of a-quadrant, kinetic pressure balancing district.
The top of described annular concave platform and end are provided with valve pocket groove 202.
The beneficial effect of the utility model valve rod:
1, not only can hold wear particle at the super-hydrophobic micro-Surface Texture of surface Machining, store lubricant medium, reduce friction, increase wear-resisting property; Under the effect of steam flow pressure, condensed water can be dredged rapidly valve rod A district hydrodynamic equilibrium region by super-hydrophobic interface simultaneously.
2, surface Machining kinetic pressure balancing groove, valve rod is continual reciprocation in valve pocket, valve rod is offered axially symmetrical kinetic pressure balancing groove, has and communicate with sealing liquid storage tank in compensating groove.Based on hydrodynamic Elastic fluid theory, dynamic pressure can be set up in compensating groove inside and open effect, between valve rod 1 and valve pocket 2, realize complete fluid film lubrication, the vibration that balance valve rod is caused by unstable Airflow Exciting-Vibration Force, strengthen valve rod centring property, eliminate valve rod eccentric wear, reduce to leak.Compensating groove, drainage trough can triangle or the various shapes such as U-shaped.
3, offer multi-stage valve rod sealing liquid storage tank and not only can dredge out water condensate storage by from B region, for kinetic pressure balancing groove provides lubricant medium, multi-stage sealed effect can be reached simultaneously, by flow resistance effect, reduce steam leakage further.
Turbine governor valve of the present utility model adopts super hydrophilic valve pocket, and condensed water super hydrophobic surface can dredged out is evenly distributed on rapidly kinetic pressure balancing region stem surface.
Accompanying drawing explanation
Fig. 1 is the perspective view of the utility model valve rod;
Fig. 2 is modulating valve overall structure schematic diagram;
Fig. 3 is hydrophobic B region and hydrophilic C region surface texture schematic diagram;
Fig. 4 is kinetic pressure balancing a-quadrant trigonometric form groove structural representation;
Fig. 5 is the close-up schematic view of kinetic pressure balancing a-quadrant triangle type groove structure;
Fig. 6 is the U-shaped type groove structure schematic diagram in kinetic pressure balancing a-quadrant;
Fig. 7 is the structural representation in valve pocket C region;
Fig. 8 is the close-up schematic view in valve pocket C region.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As shown in Figure 1 and Figure 2, valve rod 1 has a-quadrant, B region in valve pocket 2 mating area section, and B region is in lower end, a-quadrant; Described a-quadrant is kinetic pressure balancing district, and described B region is hydrophobic region, and wherein a-quadrant is arranged on valve rod accounts for valve rod overall length L 1/8 ~ 1/6 place by outlet end distance L4; Spacing L1 between described a-quadrant and B region is 10 ~ 20mm; 1/6 ~ 1/5, the B peak width B2 that a-quadrant width B 1 accounts for valve rod overall length accounts for 1/6 ~ 1/5 of valve rod overall length.
The region surface in described kinetic pressure balancing district is provided with valve stem seal liquid storage tank 103, kinetic pressure balancing groove 101 is provided with between two adjacent valve stem seal liquid storage tanks, kinetic pressure balancing groove is circumferentially uniform, and the kinetic pressure balancing groove between adjacent two valve stem seal liquid storage tanks is symmetrical vertically and be crisscross arranged; Be provided with drainage trough 102 bottom described kinetic pressure balancing groove 101, kinetic pressure balancing groove 101, drainage trough 102 communicate with valve stem seal liquid storage tank 103;
Described kinetic pressure balancing groove 101 is identical with the shape of drainage trough 102, and ratio is different; The height H of kinetic pressure balancing groove is 2 ~ 3mm, is 0.5 ~ 1mm with the width B 4 at the valve stem seal liquid storage tank place of communicating; The surface area of drainage trough account for kinetic pressure balancing rooved face long-pending 1/4 ~ 1/3; The groove depth h2 of kinetic pressure balancing groove deep h1 and drainage trough is 50 ~ 100 μm; The pitch of grooves L2 of valve stem seal liquid storage tank is 3 ~ 5mm; Groove depth h3 is 100 ~ 150 μm, and groove width B4 is 1 ~ 2mm;
As shown in Fig. 4, Fig. 5, Fig. 6, described kinetic pressure balancing groove 101 is trigonometric form groove or U-type groove;
As shown in Figure 3, described hydrophobic region B region surface be provided with all with arrayed surface texture 104, described hydrophobic region Surface Texture 104 is dimpling type or nick type Surface Texture; Described hydrophobic region Surface Texture 104 texture spacing L3=15um ~ 55um, texture height h4=3um ~ 10um; The shape of described dimpling type is cylindrical protrusions, and nick type is cylinder shape groove;
As shown in Figure 7, Figure 8, a kind of turbine governor valve valve pocket 2, described turbine governor valve valve pocket 2 is split type structure, and described valve pocket 2 inside is equipped with ultra-hydrophilic surface texture 201; Described ultra-hydrophilic surface texture 201 is dimpling type or nick type Surface Texture; Described ultra-hydrophilic surface texture 201 texture spacing L3=15um ~ 55um, texture height h4=3um ~ 10um; The shape of described dimpling type is cylindrical protrusions, and nick type is cylinder shape groove; Described valve pocket 2 is 0.05 ~ 0.1mm with valve rod 1 matching gap;
Described water-wetted surface texture is annular concave platform surface in valve pocket, and concave station degree of depth h5 is than hydrophilic texture height or the high 10 ~ 20um of degree of depth h4, and its width is equal with water-wetted surface texture area width.Described annular concave platform and described water-wetted surface texture area form C region, present position, corresponding A region, present position, C region;
The width in described water-wetted surface texture C region is width B 1 and the twice valve rod travel sum of a-quadrant, kinetic pressure balancing district.
The top of described annular concave platform and end are provided with valve pocket groove 202.
Claims (5)
1. turbine governor valve valve rod, is characterized in that: valve rod has a-quadrant, B region in valve pocket mating area section, and B region is in lower end, a-quadrant; Described a-quadrant is kinetic pressure balancing district, and described B region is hydrophobic region, and wherein a-quadrant is arranged on valve rod accounts for valve rod overall length L 1/8 ~ 1/6 place by outlet end distance L4; Spacing L1 between described a-quadrant and B region is 10 ~ 20mm; 1/6 ~ 1/5, the B peak width B2 that a-quadrant width B 1 accounts for valve rod overall length accounts for 1/6 ~ 1/5 of valve rod overall length L.
2. turbine governor valve valve rod according to claim 1, it is characterized in that: the region surface in described kinetic pressure balancing district is provided with valve stem seal liquid storage tank, kinetic pressure balancing groove is provided with between two adjacent valve stem seal liquid storage tanks, kinetic pressure balancing groove is circumferentially uniform, and the kinetic pressure balancing groove between adjacent two valve stem seal liquid storage tanks is symmetrical vertically and be crisscross arranged; Described kinetic pressure balancing groove bottom is provided with drainage trough, and kinetic pressure balancing groove, drainage trough communicate with valve stem seal liquid storage tank;
Described kinetic pressure balancing groove is identical with drainage trough shape, and ratio is different; The height H of kinetic pressure balancing groove is 2 ~ 3mm, is 0.5 ~ 1mm with the width B 3 at the valve stem seal liquid storage tank place of communicating; The surface area of drainage trough account for kinetic pressure balancing rooved face long-pending 1/4 ~ 1/3; The groove depth h1 of kinetic pressure balancing groove and the groove depth h2 of drainage trough is 50 ~ 100 μm;
The pitch of grooves L2 of described valve stem seal liquid storage tank is 3 ~ 5mm; Groove depth h3 is 100 ~ 150 μm, and groove width B4 is 1 ~ 2mm.
3. turbine governor valve valve rod according to claim 1, is characterized in that: described hydrophobic region B region surface be provided with all with arrayed surface texture, described hydrophobic region Surface Texture is dimpling type or nick type Surface Texture; Described hydrophobic region Surface Texture texture spacing L3=15um ~ 55um, texture height h4=3um ~ 10um; The shape of described dimpling type is cylindrical protrusions, and nick type is cylinder shape groove.
4. turbine governor valve valve rod according to claim 2, is characterized in that:
Described kinetic pressure balancing groove is trigonometric form groove or U-type groove.
5. turbine governor valve valve pocket, is characterized in that: described valve pocket is split type structure, and described valve pocket inside is equipped with ultra-hydrophilic surface texture; Described ultra-hydrophilic surface texture is dimpling type or nick type Surface Texture; Described ultra-hydrophilic surface texture texture spacing L3=15um ~ 55um, texture height h4=3um ~ 10um; The shape of described dimpling type is cylindrical protrusions, and nick type is cylinder shape groove; Described valve pocket and valve rod matching gap are 0.05 ~ 0.1mm;
Described water-wetted surface texture is annular concave platform surface in valve pocket, and concave station degree of depth h5 is than hydrophilic texture height or the high 10 ~ 20um of degree of depth h4, and its width is equal with water-wetted surface texture area width; Described annular concave platform and described water-wetted surface texture area form C region, present position, corresponding A region, present position, C region;
The width in described water-wetted surface texture C region is width B 1 and the twice valve rod travel sum of a-quadrant, kinetic pressure balancing district;
The top of described annular concave platform and end are provided with valve pocket groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520096362.5U CN204628791U (en) | 2015-02-10 | 2015-02-10 | Turbine governor valve valve rod and valve pocket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520096362.5U CN204628791U (en) | 2015-02-10 | 2015-02-10 | Turbine governor valve valve rod and valve pocket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204628791U true CN204628791U (en) | 2015-09-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520096362.5U Withdrawn - After Issue CN204628791U (en) | 2015-02-10 | 2015-02-10 | Turbine governor valve valve rod and valve pocket |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204628791U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104747796A (en) * | 2015-02-10 | 2015-07-01 | 杭州电子科技大学 | Valve rod and valve bush of turbine regulating valve |
| CN110318902A (en) * | 2019-04-23 | 2019-10-11 | 天津大学 | Hydrophobic type cylinder jacket outer surface structure and hydrophobic type cylinder jacket |
-
2015
- 2015-02-10 CN CN201520096362.5U patent/CN204628791U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104747796A (en) * | 2015-02-10 | 2015-07-01 | 杭州电子科技大学 | Valve rod and valve bush of turbine regulating valve |
| CN110318902A (en) * | 2019-04-23 | 2019-10-11 | 天津大学 | Hydrophobic type cylinder jacket outer surface structure and hydrophobic type cylinder jacket |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150909 Effective date of abandoning: 20170606 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20150909 Effective date of abandoning: 20170606 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |