CN106837944A - Plane hydraulic system impact of water hammer weakens method and apparatus - Google Patents
Plane hydraulic system impact of water hammer weakens method and apparatus Download PDFInfo
- Publication number
- CN106837944A CN106837944A CN201710195169.0A CN201710195169A CN106837944A CN 106837944 A CN106837944 A CN 106837944A CN 201710195169 A CN201710195169 A CN 201710195169A CN 106837944 A CN106837944 A CN 106837944A
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- Prior art keywords
- valve
- plumbing system
- water hammer
- closing
- hydraulic plumbing
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Details Of Valves (AREA)
- Pipe Accessories (AREA)
- Fluid-Driven Valves (AREA)
- Domestic Plumbing Installations (AREA)
Abstract
Weaken method and apparatus the invention provides plane hydraulic system impact of water hammer, methods described includes：In the valve in opening the hydraulic plumbing system, valve is slowly opened within the opening time of valve, then further accelerate the unlatching valve；And in the valve in closing the hydraulic plumbing system, valve slowly closing is first made within the shut-in time of valve, then further accelerate the closing valve.
Description
Technical field
Weaken method and apparatus the present invention relates to plane hydraulic system impact of water hammer.
Background technology
Water hammer effect refer to water or other liquid in hydraulic plumbing system course of conveying, opened suddenly due to valve or closed
Close, make flow velocity in pipeline that suddenly change to occur, while pressure produces the phenomenon for fluctuating widely.Especially, in airplane hydraulic pressure system
In system, the high frequency response of servo valve will cause water hammer effect, cause the vibration and noise problem of hydraulic energy source pipe-line system, sternly
Even can be to the consequence of damaging property of pipe-line system during weight.
For hydraulic plumbing system, such as airplane Hydraulic Tube system, the valve element of the valve of such as servo valve is opened and closed
Time is the key factor for influenceing water hammer strong and weak.Specifically, as illustrated in fig. 1 and 2, the spool displacement of most of servo valves with
Unlatching/the shut-in time is substantially linear.In other words, when valve element fast opening and closing, flow changes rapidly in pipeline, liquid stream
Abrupt deceleration accelerates necessarily with very big pressure change, and alternately lifting carrys out travel back in pipeline for this pressure oscillation, i.e.,
Cause water hammer effect.As illustrated in fig. 1 and 2, when the power of water hammer effect is heavily dependent on valve element and opens and closes suddenly, fluid stream
The fast-changing degree of speed.For example, when valve element is closed suddenly, pipeline inner fluid occurs the process that supercharging is slowed down, fluid stream
Speed is kept to zero, and all momentum total losses are fallen, all of kinetic energy be converted to it is elastic can, therefore occur that what pressure rose sharply shows
As.
In the prior art, water hammer effect is reduced by increasing valve element opening and closing time, however, increasing valve element opening and closing time
The dynamic response of system can be negatively affected.
Accordingly, it would be desirable to the water hammer effect of hydraulic plumbing system is eliminated or reduced in the case where valve element opening and closing time is not changed
The method and apparatus answered.
The content of the invention
In view of the above problems, the invention provides a kind of method and apparatus, its water hammer that can reduce hydraulic plumbing system
Effect, so as to reduce vibration and the noise of hydraulic plumbing system.
According to an aspect of the present invention, there is provided a kind of method for reducing the water hammer effect of hydraulic plumbing system, wrap
Include：
In the valve in opening the hydraulic plumbing system, valve is first set slowly to open within the opening time of valve,
Then the unlatching valve is further accelerated；And
In the valve in closing the hydraulic plumbing system, valve slowly closing is first made within the shut-in time of valve,
Then the closing valve is further accelerated.
According to embodiment, the opening time and the shut-in time are respectively less than the length of pipe and fluid of twice in pipeline
In pressure velocity of wave ratio.
According to embodiment, by combination or damping hole that different-stiffness spring is set on the valve so that described
Valve is first slowly turned on and off, and then further accelerates and is turned on and off the valve.
According to embodiment, when the moment of the half for reaching the opening time or the shut-in time, the valve
The unlatching displacement of valve element closes displacement less than the 40% of total displacement.
According to another aspect of the present invention, there is provided a kind of device for reducing the water hammer effect of hydraulic plumbing system,
It is configured to：
In the valve in opening the hydraulic plumbing system, valve is first set slowly to open within the opening time of valve,
Then the unlatching valve is further accelerated；And
In the valve in closing the hydraulic plumbing system, valve slowly closing is first made within the shut-in time of valve,
Then the closing valve is further accelerated.
According to embodiment, the opening time and the shut-in time are respectively less than the length of pipe and fluid of twice in pipeline
In pressure velocity of wave ratio.
According to embodiment, when the moment of the half for reaching the opening time or the shut-in time, the valve
The unlatching displacement of valve element closes displacement less than the 40% of total displacement.
It is of the invention for reducing the device of the water hammer effect of hydraulic plumbing system according to embodiment, including it is arranged on institute
State combination or the damping hole of different-stiffness spring on valve.
Brief description of the drawings
Fig. 1 is the spool displacement and characteristic between the opening time for illustrating the valve of the hydraulic plumbing system of prior art
Curve map.
Fig. 2 is the spool displacement and characteristic between the shut-in time for illustrating the valve of the hydraulic plumbing system of prior art
Curve map.
Fig. 3 is the spool displacement and opening time for illustrating the valve of hydraulic plumbing system according to embodiments of the present invention
Between characteristic curve map.
Fig. 4 is the spool displacement and shut-in time for illustrating the valve of hydraulic plumbing system according to embodiments of the present invention
Between characteristic curve map.
Specific embodiment
The water hammer effect for reducing hydraulic plumbing system according to embodiments of the present invention is illustrated referring to the drawings
Method and apparatus.
Fig. 3 and 4 shows spool displacement and the shut-in time of the valve of hydraulic plumbing system according to embodiments of the present invention
Between characteristic curve map.
Specifically, in the case of the opening and closing time for not changing the valve of hydraulic plumbing system, such as the institutes of Fig. 3 and 4
Show, the method for the water hammer effect for reducing hydraulic plumbing system of the invention is characterised by：
In valve closing, first make valve slowly closing, closing velocity is then accelerated again.Valve element slowly closing can slow down
Fluid kinetic energy is converted into the process of elastic energy, that is, slow down the degree that pressure rises sharply such that it is able to weaken water hammer effect, at this moment fluid
Pressurization in pipeline has been obtained for certain buffering, so valve element accelerates closing velocity and can't aggravate water hammer effect again
Should.
Similarly, in valve opening, valve is slowly opened, opening speed is then accelerated again.Valve is slowly opened
When, the oil flow into valve sharp edge restriction relative can slow down such that it is able to weaken water hammer effect, at this moment fluid is in low pressure
Chamber can set up certain pressure, so valve accelerates opening speed and can't aggravate water hammer effect again.
Embodiments in accordance with the present invention, the opening time t1 and shut-in time t2 of valve are respectively less than the length of pipe 21 of twice
The ratio of the pressure velocity of wave c with fluid in pipeline, i.e. 21/c.
According to embodiment, valve opening and the actual segment curve closed can be according to coming true the need for different pipe-line systems
It is fixed.As moment t1/2, t2/2 of the half for reaching opening time or shut-in time, the unlatching displacement of the valve element of valve or pass
Displacement is closed less than the 40% of total displacement x1.
Embodiments in accordance with the present invention, can by valve set different-stiffness spring combination or damping hole,
To make valve first slowly be turned on and off, then further accelerate and be turned on and off valve.However, the invention is not restricted to this, Ren Heke
Be can be used with the device of the fast motion process of the segmentation point for realizing valve.
In sum, the invention provides one kind by segmentation it is point fast change valve motion and reduce hydraulic plumbing system
Water hammer effect method and apparatus.
Obviously, above-described embodiment is only intended to clearly illustrate example of the present invention, and is not to of the invention
The restriction of implementation method.For those of ordinary skill in the field, it can also be made on the basis of the above description
The change or variation of its multi-form.There is no need and unable to be exhaustive to all of implementation method.And these belong to this hair
Obvious change that bright spirit is extended out or among changing still in protection scope of the present invention.
Claims (8)
1. a kind of method for reducing the water hammer effect of hydraulic plumbing system, including：
In the valve in opening the hydraulic plumbing system, valve is first set slowly to open within the opening time of valve, then
Further accelerate the unlatching valve；And
In the valve in closing the hydraulic plumbing system, valve slowly closing is first made within the shut-in time of valve, then
Further accelerate the closing valve.
2. the method for the as claimed in claim 1 water hammer effect for being used to reduce hydraulic plumbing system, wherein, the opening time
With the ratio that the shut-in time is respectively less than the pressure velocity of wave of the length of pipe and fluid of twice in pipeline.
3. the method for the as claimed in claim 1 or 2 water hammer effect for being used to reduce hydraulic plumbing system, wherein, by institute
State combination or the damping hole that different-stiffness spring is set on valve so that the valve is first slowly turned on and off, Ran Houzai
Acceleration is turned on and off the valve.
4. the method for the as claimed in claim 1 or 2 water hammer effect for being used to reduce hydraulic plumbing system, wherein, when reaching
The moment of the half of opening time or the shut-in time is stated, the unlatching displacement or closing displacement of the valve element of the valve are small
In the 40% of total displacement.
5. a kind of device for reducing the water hammer effect of hydraulic plumbing system, is configured to：
In the valve in opening the hydraulic plumbing system, valve is first set slowly to open within the opening time of valve, then
Further accelerate the unlatching valve；And
In the valve in closing the hydraulic plumbing system, valve slowly closing is first made within the shut-in time of valve, then
Further accelerate the closing valve.
6. the device of the as claimed in claim 5 water hammer effect for being used to reduce hydraulic plumbing system, wherein, the opening time
With the ratio that the shut-in time is respectively less than the pressure velocity of wave of the length of pipe and fluid of twice in pipeline.
7. the device of the water hammer effect for reducing hydraulic plumbing system as described in claim 5 or 6, wherein, when reaching
The moment of the half of opening time or the shut-in time is stated, the unlatching displacement or closing displacement of the valve element of the valve are small
In the 40% of total displacement.
8. the device of the water hammer effect for reducing hydraulic plumbing system as described in claim 5 or 6, including be arranged on described
The combination of the different-stiffness spring on valve or damping hole.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710020694 | 2017-01-11 | ||
| CN2017100206949 | 2017-01-11 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106837944A true CN106837944A (en) | 2017-06-13 |
| CN106837944B CN106837944B (en) | 2019-06-07 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710195169.0A Active CN106837944B (en) | 2017-01-11 | 2017-03-28 | Plane hydraulic system impact of water hammer weakens method and apparatus |
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| Country | Link |
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| CN (1) | CN106837944B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114771848A (en) * | 2022-06-20 | 2022-07-22 | 中国飞机强度研究所 | Water hammer effect suppression system and method for airplane structure impact resistance test |
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|---|---|---|---|---|
| CN2469280Y (en) * | 2001-03-12 | 2002-01-02 | 武汉大禹阀门制造有限公司 | Delay opening/closing check valve |
| CN2906230Y (en) * | 2006-06-07 | 2007-05-30 | 爱福瑞·凯德 | Isolating safety control valve |
| CN201610989U (en) * | 2010-02-05 | 2010-10-20 | 山东国泰创新供水技术有限公司 | Flexible device capable of buffering a water hammer effect |
| CN203189771U (en) * | 2013-04-02 | 2013-09-11 | 浙江工贸职业技术学院 | Waterproof hammer plug valve |
| CN104676055A (en) * | 2014-12-26 | 2015-06-03 | 上海亚核阀业成套有限公司 | Low-shake low-noise water-hammer-free check valve |
| CN204437458U (en) * | 2015-01-13 | 2015-07-01 | 申如意 | A kind of family expenses water hammer buffer safety device |
| CN104847930A (en) * | 2015-04-18 | 2015-08-19 | 张新丰 | Slow-closed rotary-opened type check valve capable of preventing water hammer |
| CN204563757U (en) * | 2015-03-31 | 2015-08-19 | 黄云冲 | Prevent the core texture of water hammer effect |
| CN204942747U (en) * | 2015-07-14 | 2016-01-06 | 福建金源泉科技发展有限公司 | Reduction valve eliminated by the water hammer being applied to water purifier |
| CN205534807U (en) * | 2016-01-22 | 2016-08-31 | 玉环县欣达机械制造有限公司 | Water hammer remover |
| CN205824275U (en) * | 2016-07-12 | 2016-12-21 | 玉环云达阀门有限公司 | A kind of water hammer-resistant angle valve |
-
2017
- 2017-03-28 CN CN201710195169.0A patent/CN106837944B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2469280Y (en) * | 2001-03-12 | 2002-01-02 | 武汉大禹阀门制造有限公司 | Delay opening/closing check valve |
| CN2906230Y (en) * | 2006-06-07 | 2007-05-30 | 爱福瑞·凯德 | Isolating safety control valve |
| CN201610989U (en) * | 2010-02-05 | 2010-10-20 | 山东国泰创新供水技术有限公司 | Flexible device capable of buffering a water hammer effect |
| CN203189771U (en) * | 2013-04-02 | 2013-09-11 | 浙江工贸职业技术学院 | Waterproof hammer plug valve |
| CN104676055A (en) * | 2014-12-26 | 2015-06-03 | 上海亚核阀业成套有限公司 | Low-shake low-noise water-hammer-free check valve |
| CN204437458U (en) * | 2015-01-13 | 2015-07-01 | 申如意 | A kind of family expenses water hammer buffer safety device |
| CN204563757U (en) * | 2015-03-31 | 2015-08-19 | 黄云冲 | Prevent the core texture of water hammer effect |
| CN104847930A (en) * | 2015-04-18 | 2015-08-19 | 张新丰 | Slow-closed rotary-opened type check valve capable of preventing water hammer |
| CN204942747U (en) * | 2015-07-14 | 2016-01-06 | 福建金源泉科技发展有限公司 | Reduction valve eliminated by the water hammer being applied to water purifier |
| CN205534807U (en) * | 2016-01-22 | 2016-08-31 | 玉环县欣达机械制造有限公司 | Water hammer remover |
| CN205824275U (en) * | 2016-07-12 | 2016-12-21 | 玉环云达阀门有限公司 | A kind of water hammer-resistant angle valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114771848A (en) * | 2022-06-20 | 2022-07-22 | 中国飞机强度研究所 | Water hammer effect suppression system and method for airplane structure impact resistance test |
| CN114771848B (en) * | 2022-06-20 | 2022-09-13 | 中国飞机强度研究所 | Water hammer effect suppression system and method for airplane structure impact resistance test |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106837944B (en) | 2019-06-07 |
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