CN105240059B - Valve vibration damping hole dimension determines method - Google Patents
Valve vibration damping hole dimension determines method Download PDFInfo
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- CN105240059B CN105240059B CN201510713803.6A CN201510713803A CN105240059B CN 105240059 B CN105240059 B CN 105240059B CN 201510713803 A CN201510713803 A CN 201510713803A CN 105240059 B CN105240059 B CN 105240059B
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- unloading port
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Abstract
Valve vibration damping hole dimension determines method, comprises the steps that main valve dish in valve need to be reduced total lift in the hole that shakes and be divided into multiple lift scope by (1), drafts and propose the groove put on valve pocket, draft the size of groove；(2) unloading port and size thereof are drafted in position corresponding in the range of main valve dish with a wherein lift；(3) numerical flow simulation valve internal Field Characteristics is utilized；(4) carry out main valve dish according to Field Characteristics and obtain the out-of-balance force in the aperture direction suffered by main valve dish；(5) if step (4) out-of-balance force meets predetermined condition, the unloading port size of all satisfied requirements is given；(6) adjust the lift of main valve dish, repeat step (2) to step (5), provide in step (2) remaining lift in the range of a wherein lift and meet the unloading port size of requirement；(7) repeat step (2) to step (6), provide the unloading port size that remaining lift scope is corresponding.It determines valve vibration damping hole dimension energeticly.
Description
Technical field
The present invention relates to valve antivibration area, be specifically related to the valve vibration damping hole dimension side of determination
Method.
Background technology
The service behaviour level of Steam Turbine is extremely closed by stop valve, the safe and stable operation of regulation valve
Important.Power plant's finding shows, more serious regulating valve rod system vibration can make unit bear
Lotus amplitude of fluctuation reaches 8%, even close to boiler water level warning line, and administers the vapour that put into operation
Turbine stop valve, the method for regulating valve rod system vibration suffer from the restriction of each side.
At present, engineering strengthens main valve dish aperture direction usually through perforate on main valve dish, valve pocket
The method of out-of-balance force carrys out vibration damping.But, the most by rule of thumb, use qualitative fashion leading
Perforate on valve disc, valve pocket, its operability is poor, perforate low precision, and effectiveness in vibration suppression is poor.
For this reason, it may be desirable to seek a kind of technical scheme, at least to alleviate the problems referred to above.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of valve vibration damping hole dimension and determines method,
Utilize the method, determine valve vibration damping hole dimension energeticly.
For solving above-mentioned technical problem, the present invention uses following technical proposals.
A kind of valve vibration damping hole dimension determines method, comprises the steps:
(1) total lift that main valve dish in described valve need to be reduced the hole that shakes is divided into multiple lift
Scope, and draft propose on the valve pocket of this valve put run through this sleeve wall, along this valve
The groove that aperture direction extends and development length is equal with described lift scope, and draft the chi of this groove
Very little；
(2) position corresponding in the range of described main valve dish with wherein lift described in is drafted
Propose at least one unloading port and size thereof put；
(3) utilize numerical flow simulation to go out described step (2) and proposed the unloading port put
The Field Characteristics of described valve internal under a lift in the range of corresponding lift；
(4) Field Characteristics of this valve internal obtained according to described step (3) carries out main valve
Dish aperture reduces direction upward pressure FV, relief chamber outlet aperture increase direction buoyancy FgMake a concerted effort
It is calculated the out-of-balance force F in this aperture direction suffered by main valve dishh；
(5) if the out-of-balance force F that obtains of described step (4)hMeet predetermined condition, then described
The described unloading port size drafted in step (2) meets requirement, and provides described step (3)
All satisfied requirements under a lift in the range of the middle lift proposed corresponding to the unloading port put
Proposed the unloading port size put；
(6) in described step (2), this wherein adjusts described main valve in the range of lift described in
The lift of dish, repeating said steps (2) to described step (5), provide described step (2)
In this wherein in the range of lift described in remaining lift meet requirement proposed the unloading port put
Size；
(7) repeating said steps (2) is to described step (6), be given described main valve dish,
Corresponding with remaining lift scope is proposed the unloading port size put.
After described step (7) completes, adjust the number that the described total lift of main valve dish is divided equally, repeat
Described step (1) to described step (7) obtains the groove chi that being proposed corresponding to each number is put
Very little and unloading port size, preferably goes out in the range of each lift corresponding to unloading port size variance minimum
All marks, and be given groove size that being proposed corresponding to the equal mark preferably gone out put and excellent
Being applicable to corresponding to the equal mark selected is proposed the unloading port put in the range of different lift
Size.
In described step (5), if the described out-of-balance force obtained is unsatisfactory for described predetermined condition,
Then adjust size the repeating said steps of the described unloading port drafted in described step (2)
(3) to described step (4).
Described predetermined condition is:
Described groove is mounting hole.
The present invention has following Advantageous Effects.
The application present invention, can determine size and the valve proposing the unloading port put on main valve dish quantitatively
Put the size proposing the groove put.In actual engineering design, apply the present invention, be beneficial to big
Sizable application and popularization, strong operability.In practice of construction, based on the present invention quantitatively determined by
Groove, unloading port and size thereof, offer corresponding unloading port on main valve dish and offer on valve pocket
Groove, it is workable, and fluting, unloading port precision are high, and carry when not changing big valve and will open
On the premise of lift, the pressure of relief chamber under different opening can be changed, hence it is evident that improve valve and run
The vibration produced, good damping result, improve the stability that valve runs.
Accompanying drawing explanation
Fig. 1 is the flow chart of the inventive method.
Fig. 2 is that on corresponding valve disc, the unloading port 31 of required processing is shown in main valve dish lift scope 1
It is intended to.
Fig. 3 is that on corresponding valve disc, the unloading port 32 of required processing is shown in main valve dish lift scope 2
It is intended to.
Detailed description of the invention
For technical characteristic and effect of the present invention can be described in detail, and can be according in this specification
Hold and realize, below in conjunction with the accompanying drawings embodiments of the present invention are further illustrated.
As Fig. 2,3, for the valve that the present invention relates to, in figure, 1 represents regulating valve stem, 2 tables
Showing valve pocket, 3 represent main valve dish, and 4 represent equalizing valve dish, and 5 represent big valve base, and 6 represent valve
Body.
A kind of valve vibration damping hole dimension that Fig. 1 schematically shows in the numerous embodiment of the present invention is true
Determine the embodiment of method.See in the lump Fig. 2,3, this valve vibration damping hole dimension determines method,
Comprise the steps:
(1) total lift that main valve dish in described valve need to be reduced the hole that shakes is divided into m lift
Scope, and it is designated as lift scope 1, lift scope 2 ..., lift scope m, wherein m successively
More than or equal to 2, and draft proposing to put on the valve pocket 2 of this valve and run through this sleeve wall, edge
The groove that the aperture direction of this valve extends and development length is equal with this lift scope, and draft this
The size of groove, the quantity of groove is 1；
(2) in the range of main valve dish 3 with a wherein lift in such as lift scope 1, this liter
Position corresponding to journey scope 1 is drafted and is proposed at least one unloading port and size thereof put, such as,
Unloading port Ф=D；
(3) utilize numerical flow simulation go out step (2) proposed put unloading port institute right
In the range of the lift answered (as in lift scope 1) Field Characteristics within a lift lower valve；
(4) Field Characteristics of this valve internal obtained according to step (3) carries out main valve dish and opens
Degree reduces direction upward pressure FV, relief chamber outlet aperture increase direction buoyancy FgMake a concerted effort calculate
Obtain the out-of-balance force F in this aperture direction suffered by main valve dishh；
(5) if the out-of-balance force F that obtains of step (4)hMeet predetermined condition, then step (2)
Middle drafted unloading port size meets requirement, and is given and is proposed unloading of putting in step (3)
Carry and all under (in lift scope 1) lift in the range of lift corresponding to hole meet requirement
Proposed the unloading port size put；
(6) in step (2) this wherein in the range of a lift (in lift scope 1) adjust
The lift of whole main valve dish, repeats step (2) to step (5), provides in step (2) this its
In in the range of lift described in (in lift scope 1) remaining lift meet requirement propose
The unloading port size put；
(7) step (2) to step (6) is repeated, be given main valve dish and remaining lift model
Enclose that (what i.e. lift scope 2 ..., lift scope m) were corresponding is proposed the unloading port chi put
Very little.
It is also preferred that the left after step (7) completes, adjust the number that the total lift of main valve dish 3 is divided equally, example
If number is n, the lift of main valve dish 3 will be divided into n lift scope, wherein n is more than
Equal to 2 and n is not equal to m, repeat step (1) and obtain corresponding to each number to step (7)
Proposed the groove size and unloading port size put, preferably go out unloading port size in the range of each lift
Equal mark corresponding to variance minimum, and provide being proposed corresponding to the equal mark preferably gone out
Corresponding to the groove size put and the equal mark preferably gone out be applicable to different lift in the range of
Proposed the unloading port size put.
Aforementioned groove size and the unloading port size putting being proposed corresponding to each number carries out excellent
Choosing, can effectively reduce and be proposed the groove 21 put lift scope adjacent with on main valve dish 3 on valve pocket
Unloading port alternate communication time occur vibration.
Aforementioned predetermined condition is actual according to engineering, can be such as predetermined value, predetermined formula or not
Equation, etc..In the present embodiment, this predetermined condition is:
In above-mentioned steps (5), if the out-of-balance force obtained is unsatisfactory for aforementioned predetermined condition, then
The size of the unloading port drafted in set-up procedure (2) also repeats step (3) to step (4).
It is also preferred that the left groove 21 is mounting hole.Use this structure can be prevented effectively from valve running
The appearance that near middle groove, stress is concentrated.
According to the unloading port size in the range of the mounting hole size that preferably goes out and variant lift,
The groove 21 extended along valve opening direction is processed, in the range of each lift of main valve dish 3 on valve pocket 2
N the unloading port such as the processing corresponding unloading port 31 of size, unloading port 32, unloading port 33,
See Fig. 2.When main valve dish 3 rises with valve rod 1, when just having reached in lift scope 1, groove 21
The unloading port 31 of size corresponding with in lift scope 1 starts to connect, steam flow through groove 21, unload
Carry hole 31 order and enter relief chamber, make the axial out-of-balance force of main valve dish 3 reach requirement.If
Main valve dish 3 continues to rise to beyond above-mentioned lift, and groove 21 is progressively closed with unloading port 31,
The unloading port 32 of this time slot 21 size corresponding with in main valve dish 3 lift scope 2 connects, ginseng
See Fig. 3.Valve opening continues to lift up, and the rest may be inferred, and other unloading port on main valve dish 3 are such as
Corresponding chi in the corresponding unloading port 33 ... of size, lift scope m in lift scope 3
Very little unloading port 3m etc. connect (closedown) successively with groove 21.
It should be noted that each the concrete technical characteristic described in above-mentioned detailed description of the invention,
In the case of reconcilable, can by any applicable by the way of be combined.In order to avoid not
Necessary repetition, various possible compound modes are not described further by the present invention.
Above with reference to embodiment to the present invention have been described in detail, it is illustrative rather than restricted
, changing and modifications under without departing from present general inventive concept, all at the protection model of the present invention
Within enclosing.
Claims (4)
1. a valve vibration damping hole dimension determines method, it is characterised in that comprise the steps:
(1) total lift that main valve dish in described valve need to be reduced the hole that shakes is divided into multiple lift
Scope, and draft propose on the valve pocket of this valve put run through this sleeve wall, along this valve
The groove that aperture direction extends and development length is equal with described lift scope, and draft the chi of this groove
Very little；
(2) position corresponding in the range of described main valve dish with wherein lift described in is drafted
Propose at least one unloading port and size thereof put；
(3) utilize numerical flow simulation to go out described step (2) and proposed the unloading port put
The Field Characteristics of described valve internal under a lift in the range of corresponding lift；
(4) Field Characteristics of this valve internal obtained according to described step (3) carries out main valve
Dish aperture reduces direction upward pressure FV, relief chamber outlet aperture increase direction buoyancy FgMake a concerted effort
It is calculated the out-of-balance force F in this aperture direction suffered by main valve dishh；
(5) if the out-of-balance force F that obtains of described step (4)hMeet predetermined condition, then described
The described unloading port size drafted in step (2) meets requirement, and provides described step (3)
All satisfied requirements under a lift in the range of the middle lift proposed corresponding to the unloading port put
Proposed the unloading port size put；
(6) in described step (2), this wherein adjusts described main valve in the range of lift described in
The lift of dish, repeating said steps (2) to described step (5), provide described step (2)
In this wherein in the range of lift described in remaining lift meet requirement proposed the unloading port put
Size；
(7) repeating said steps (2) is to described step (6), be given described main valve dish,
Corresponding with remaining lift scope is proposed the unloading port size put；
Described predetermined condition is:
Valve vibration damping hole dimension the most according to claim 1 determines method, it is characterised in that
After described step (7) completes, adjust the number that the described total lift of main valve dish is divided equally, repeat described
Step (1) to described step (7) obtain groove size that being proposed corresponding to each number put and
Unloading port size, preferably goes out dividing equally corresponding to unloading port size variance minimum in the range of each lift
Number, and provide groove size that being proposed corresponding to the equal mark preferably gone out put and preferably go out
Equal mark corresponding to be applicable to proposed the unloading port size put in the range of different lift.
Valve vibration damping hole dimension the most according to claim 1 determines method, it is characterised in that
In described step (5), if the described out-of-balance force obtained is unsatisfactory for described predetermined condition, then
Adjust size the repeating said steps (3) of the described unloading port drafted in described step (2)
To described step (4).
4. determine method according to the valve vibration damping hole dimension described in any one of claims 1 to 3,
It is characterized in that, described groove is mounting hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510713803.6A CN105240059B (en) | 2015-10-28 | 2015-10-28 | Valve vibration damping hole dimension determines method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510713803.6A CN105240059B (en) | 2015-10-28 | 2015-10-28 | Valve vibration damping hole dimension determines method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105240059A CN105240059A (en) | 2016-01-13 |
| CN105240059B true CN105240059B (en) | 2016-09-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510713803.6A Active CN105240059B (en) | 2015-10-28 | 2015-10-28 | Valve vibration damping hole dimension determines method |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3389103B2 (en) * | 1998-06-08 | 2003-03-24 | 三菱重工業株式会社 | Regulating valve |
| US6892540B1 (en) * | 2004-05-27 | 2005-05-17 | General Electric Company | System and method for controlling a steam turbine |
| CN1719003B (en) * | 2004-07-07 | 2010-05-26 | 株式会社东芝 | Main steam valve for a steam turbine |
| CN1746463B (en) * | 2004-09-08 | 2011-09-07 | 株式会社东芝 | High temperature steam valve and steam turbine plant |
| CN201884074U (en) * | 2010-12-03 | 2011-06-29 | 北京全三维动力工程有限公司 | High-pressure regulating valve |
| CN102486097B (en) * | 2010-12-03 | 2015-08-26 | 北京全三维能源科技股份有限公司 | The method of septum valve and adjustment high-pressure liquid |
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