CN104373741A - Low-pulsation series capsule type buffer - Google Patents
Low-pulsation series capsule type buffer Download PDFInfo
- Publication number
- CN104373741A CN104373741A CN201410541974.0A CN201410541974A CN104373741A CN 104373741 A CN104373741 A CN 104373741A CN 201410541974 A CN201410541974 A CN 201410541974A CN 104373741 A CN104373741 A CN 104373741A
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- China
- Prior art keywords
- valve
- valve body
- capsule
- buffer
- dividing plate
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/04—Devices damping pulsations or vibrations in fluids
- F16L55/045—Devices damping pulsations or vibrations in fluids specially adapted to prevent or minimise the effects of water hammer
- F16L55/05—Buffers therefor
- F16L55/052—Pneumatic reservoirs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/04—Devices damping pulsations or vibrations in fluids
- F16L55/045—Devices damping pulsations or vibrations in fluids specially adapted to prevent or minimise the effects of water hammer
- F16L55/055—Valves therefor
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Valves (AREA)
- Pipe Accessories (AREA)
Abstract
The invention relates to a low-pulsation series capsule type buffer. The low-pulsation series capsule type buffer can be connected to an outlet pipeline of a hydrostatic test pump when a pressure test is conducted on a loop system. The buffer comprises a shell, a valve body, a capsule and a fungus type valve, wherein one end of the shell is sealed, the valve body is arranged at the other end of the shell, the valve body is communicated with the outline pipeline of the hydrostatic test pump, the capsule is arranged in the shell, a valve rod of the fungus type valve is arranged in the valve body, a valve cap is located in the shell, a partition board is connected to the lower end of the valve rod of the fungus type valve, the interior of the valve body is separated by the partition board in the water flow direction of the outlet pipeline, and a damping hole is formed in the partition board; fluid comes up against the partition board after entering the valve body, a small part of the fluid directly flows out from the damping hole, and the other most part of the fluid rushes to the capsule along a gap between one side of the fungus type valve and the valve body under the blockage of the partition board, then flows back into the valve body along a gap between the other side of the fungus type valve and the valve body after a part of energy is absorbed by the capsule, and finally flows out. Compared with the prior art, the low-pulsation series capsule type buffer has the advantages that the pressure stabilizing effect and the damping effect are good, and the structure is simple.
Description
Technical field
The present invention relates to a kind of buffer, especially relate to a kind of low pulse series connection bellows buffer.
Background technique
Buffer has purposes widely in the hydraulic system of fluid machinery, it has good pressure response, noise free and gas leakage, capacity is large, bear pressure high, serviceability temperature scope is wide, and the damping function that can play inlet/outlet runner and the ability having air bag Large Copacity absorption pressure to pulse, make pressure pulsation rate reach the expected value of prediction.
When hydraulic testpump carries out pressure testing test, for providing pressure source to circuit system, because have higher requirement to the pressure pulsation rate of test medium, so the output port buffer of high voltage stability performance must be configured at the export pipeline of hydraulic testpump, but treble ram pump outlet pressure pulsation rate is between 8 ~ 15% usually, as high in test medium pressure pulsation rate, this will affect the Meter Test precision on major loop, hydraulic testpump technical specifications requires pump discharge pressure pulsation rate requirement≤± 1%, and this is a very high voltage stability requirement.
Traditional parallel buffer and inlet/outlet pipeline are parallel connections, and connection interface is Three way type, and its characteristic structure is simple, and mounting or dismounting are convenient, are the patterns of conventional buffer.
According to fluid mechanics parallel pipeline assignment of traffic formula: Q
1=Q
2+ Q
3know, by the flow Q of main pipeline
1equal by two parallel transistor Q
2, Q
3the summation of flow.
Formula is distributed, Q according to parallel flow
3/ Q
2=(d
3/ d
2)
5/2(λ
2/ λ
3)
1/2(L
2/ L
3)
1/2, wherein d is diameter, and λ is friction factor, and L is pipe range.
Consult Fig. 1, hydraulic testpump 1 adopts plunger pump structure, and its outlet connects parallel buffer 3 by threeway equal pipe joint 2, joint, another joint connection outlet pipeline, because piping material is identical, then and friction factor λ
2=λ
3, the known L of three-way interface of buffer
2=L
3.Therefore be reduced to: Q
3/ Q
2=(d
3/ d
2)
5/2.
Distribute formula analysis according to parallel flow, parallel buffer (energy accumulator types) restriction is more the contact of flow to air bag.Assuming that: as equal in threeway caliber, pipe range is also equal, then in parallel transistor, flow is respectively 50%, therefore only has the pressure surge of 50% flow to be subject to air bag in buffer and absorbs; In threeway, predominant tube diameter is often greater than the caliber connecting one, buffer as usual, and flow-rate ratio and five powers of its pipe diameter ratio extract square root and are directly proportional, so enter in buffer that flow is less in 50% of total discharge, therefore the structure of parallel buffer (energy accumulator types) causes in total flow not high to the contact ratio of air bag.
The reduction of pump discharge pressure pulsation rate is mainly by absorption and the pooling feature of the air bag of buffer, and the ratio of the flow contact air bag of pump determines the height of pump discharge pulsation rate.If most of fluid can contact capsule, namely increase the area of contact to capsule, and the pressure pulsation of the most of fluid be touched is absorbed by air bag, then delivery side of pump pressure pulsation rate reduces also many.And parallel buffer causes the ratio of whole flow contact air bag few, therefore attenuate pulsations rate is low, and outlet pulsation rate lowers few.The attenuate pulsations (according to Fenghua hydraulic parts factory test data) more than ± 5 ~ 8% of parallel buffer, therefore parallel buffer voltage stabilizing weakening effect is not high, inadvisable.
Chinese patent CN 203257768U discloses a kind of large discharge bladder type hydropneumatic accumulator.Comprise the flange-type stream valve body, bacterial type valve, spring, piston, the self-locking nut that are fixed by gland and locknut with accumulator housing, the valve rod end of bacterial type valve is fixed on flange-type stream valve body through spring, flange-type stream valve body inner bore, piston by self-locking nut successively, flange-type stream valve body inner bore upper end is toroidal, a circle groove is provided with toroidal connecting part, the external diameter of groove is φ 70mm, and the diameter being provided with equidistant arrangement is in a groove eight through holes of φ 16mm; The diameter of bacterial type valve bonnet 2-1 is φ 88mm; The elastic force of spring is 297N.This model utility mainly carries out structural research from the angle of anti-impact force performance and energy conversion efficiency, and make the raising of anti-impact force performance, energy conversion efficiency is high.
Summary of the invention
Object of the present invention be exactly provide that a kind of voltage stabilizing weakening is effective to overcome defect that above-mentioned prior art exists, structure simple low pulse series connection bellows buffer.
Object of the present invention can be achieved through the following technical solutions:
A kind of low pulse series connection bellows buffer, when circuit system does pressure testing test, be connected on hydraulic testpump export pipeline, described buffer comprises housing, valve body, capsule and bacterial type valve, described shell one end sealing, the other end is provided with described valve body, and this valve body is connected with hydraulic testpump export pipeline, described capsule is located at enclosure interior, described bacterial type valve valve rod is located in valve body, valve emits and is positioned at housing, described bacterial type valve valve rod lower end is connected with dividing plate, valve inner separates along export pipeline water (flow) direction by dividing plate, described dividing plate is provided with damping hole.
The upper end of described capsule is fixed on housing, and lower end is free end, and the valve of lower end and bacterial type valve is provided with interval between emitting.
Described dividing plate is vertically arranged relative to direction of flow in pipeline.
Gap area between described bacterial type valve side and valve body is 8 ~ 9 times of the area of damping hole.
Described capsule is nitrile butadiene rubber capsule.
Filling gas in described capsule, and the inflation pressure in capsule is described buffer determines 55 ~ 65% of working pressure.
Buffer adopts some mature structure component of domestic accumulator as the supporting to valve body and capsule, sealing configuration.
When buffer of the present invention uses, fluid encounters dividing plate after first entering valve body, major part fluid is 90 ° of turnings after encountering dividing plate, capsule is rushed at along the gap between bacterial type valve side and valve body, after capsule absorption portion energy, returning in valve body along the gap swash of wave between bacterial type valve opposite side and valve body and flow out, remaining sub-fraction fluid directly flows out from damping hole.
Fluid enters crooked pipeline place, because the flow velocity in the middle part of liquid stream is higher, due to effect of inertia during turning, the fluid of nearly wall section will be squeezed, produce secondary flow, form eddy current, energy loss etc., dividing plate there is damping hole, eddy current, through damping hole, is discharged, and reduces energy loss and noise, therefore series connection adds the existing most of flow of damping hole flow deviding type buffer and enters in shell good with balloon contacts voltage regulation result, has again the function that eddy current discharges by damping hole.
Compared with prior art, the present invention has the following advantages and beneficial effect:
1) bellows buffer of connecting adopts series connection to add the structure of damping hole shunting, ensure that buffer has low, the excellent voltage regulation result of outlet pressure pulsation rate, has energy loss little, the advantage that noise is low simultaneously.Capsule adopts the nitrile rubber of resistance to irradiation, is through withstand voltage, extends fatigue test and verifies parts of good performance, ensure buffer reliability and versatility.
2) the existing minimizing bend loss of damping hole, minimizing function of noise on dividing plate, consider again the impact of its convection cell shunting.Inlet liquid enters valve body 90 ° when turning, and enters export pipeline decrease energy loss and noise because effect of inertia produces at nearly wall section and partition wall interior angle eddy current that secondary flow causes through damping hole.Simultaneously the area of damping hole and valve body main fluid passageway will have suitable ratio, can not shunt the flow of too much main fluid passageway, affect the effect of voltage stabilizing.The area ratio of getting main fluid passageway and the damping hole entering buffer during design is 9: 1, and this flow proportional distribution absorbs outlet pressure pulsation to greatest extent for capsule, and it is extremely useful for reducing the vibration of reciprocal delivery side of pump and reducing noise; So most fluid directly enters in housing and fully contacts with capsule.The pressure surge of this most of fluid absorb by capsule, the pulsation of the pressure of pump is greatly attenuated, and proves through buffer test test, and the ratio of this area is selected to be suitable.
3) there is the buffer runner design of damping characteristic:
In the design of buffer inner flow passage, fluid inlet and outlet passage is
trend, passage in transit 4 elbows have become the passage having damping, and the damping of on-way resistance and elbow also has certain abirritation to outlet pressure pulsations.
In sum, the structural feature of buffer of the present invention can be summarized as:
The series connection of buffer adds the structure of damping hole flow deviding type, import and export the damping buffering effect of runner and the characteristic of air bag Large Copacity absorption pressure pulsation, the combination of R (impedance), C (capacitive reactance) function is that buffer reaches excellent voltage stabilizing function, the guarantee that outlet pressure pulsation rate is low.
Accompanying drawing explanation
Fig. 1 is traditional parallel buffer structure schematic diagram;
Fig. 2 is low pulse of the present invention series connection bellows buffer structure schematic diagram;
Fig. 3 is low pulse of the present invention series connection bellows buffer partial enlargement structural representation;
Flowing state schematic diagram when Fig. 4 is fluid turning;
Fig. 5 is K-K and sectional structure schematic diagram in Fig. 4.
Number in the figure: 1 is hydraulic testpump, 2 is threeway equal pipe joint, and 3 is parallel buffer, and 4 is housing, and 5 is capsule, and 6 is dividing plate, and 7 is damping hole, and 8 is bacterial type valve, and 9 is valve body, and 10 is export pipeline.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment
As shown in Figure 2 and Figure 3, a kind of low pulse series connection bellows buffer, when circuit system does pressure testing test, is connected on hydraulic testpump export pipeline 10, buffer comprises housing 4, valve body 9, capsule 5 and bacterial type valve 8, housing 4 one end seals, and the other end is provided with valve body 9, and this valve body 9 is connected with hydraulic testpump export pipeline 10, it is inner that capsule 5 is located at housing 4, the upper end of capsule 5 is fixed on housing 4, and lower end is free end, and the valve of lower end and bacterial type valve 8 is provided with interval between emitting.Bacterial type valve 8 valve rod is located in valve body 9, valve emits and is positioned at housing 4, and bacterial type valve 8 valve rod lower end is connected with dividing plate 6, and dividing plate 6 is vertically arranged relative to direction of flow in pipeline, valve body 9 inside separates along export pipeline 10 water (flow) direction by dividing plate 6, and dividing plate 6 is provided with damping hole 7.Gap area between bacterial type valve 8 side and valve body 9 is 9 times of the area of damping hole 7.
Capsule 5 adopts the nitrile rubber of resistance to irradiation, is through withstand voltage, extends fatigue test and verifies parts of good performance, ensure buffer reliability and versatility.Filling gas in capsule 5, and the inflation pressure in capsule 5 is buffer determines 55 ~ 65% of working pressure.Buffer adopts some mature structure component of domestic accumulator as the supporting to valve body 9 and capsule 5, sealing configuration.
When the buffer of the present embodiment uses, fluid encounters dividing plate 6 after first entering valve body 9, major part fluid is 90 ° of turnings after encountering dividing plate 6, capsule 5 is rushed at along the gap between bacterial type valve 8 side and valve body 9, after capsule 5 absorption portion energy, returning in valve body 9 along the gap swash of wave between bacterial type valve 8 opposite side and valve body 9 and flow out, remaining sub-fraction fluid directly flows out from damping hole 7.
When fluid is turned, flowing state as shown in Figure 4, Figure 5, fluid enters crooked pipeline place, because the flow velocity in the middle part of liquid stream is higher, due to effect of inertia during turning, the fluid of nearly wall section will be squeezed, produce secondary flow, form eddy current, energy losses etc., dividing plate 6 has had damping hole 7, and eddy current is through damping hole 7, discharged, reduce energy loss and noise, therefore series connection adds the existing most of flow of damping hole 7 flow deviding type buffer and enters in shell good with balloon contacts voltage regulation result, has again the function that eddy current discharges by damping hole 7.
The group of buffers of the present embodiment is contained in pump discharge place, pressure transducer is respectively housed when running at test bay in the both sides of buffer inlet/outlet, adopt and survey in section, non electrical quantity is converted to electricity variable and recorded by light electrographic recording instrument.The flow 6m of pump is set during test
3/ h, pump speed is the inflation pressure 15MPa of 239r/min, buffer air bag.
Series connection bellows buffer at rated working pressure 24.5MPa, outlet pressure pulsation rate:
its outlet pressure pulsation rate < ± 1%.The design that develops of test report digital proof low pulse series connection bellows buffer is successful.
The ratio of air bag inflation pressure and actual working pressure is very large on the impact of delivery side of pump pressure pulsation rate.The best inflation pressure value of air bag is 60% of working pressure, and when air bag inflation pressure exceedes working pressure, air bag is inoperative, only has the effect of buffer inlet/outlet passage damping buffering.
Above-mentioned is can understand and use invention for ease of those skilled in the art to the description of embodiment.Person skilled in the art obviously easily can make various amendment to these embodiments, and General Principle described herein is applied in other embodiments and need not through performing creative labour.Therefore, the invention is not restricted to above-described embodiment, those skilled in the art, according to announcement of the present invention, do not depart from improvement that scope makes and amendment all should within protection scope of the present invention.
Claims (6)
1. a low pulse series connection bellows buffer, when circuit system does pressure testing test, be connected on hydraulic testpump export pipeline, described buffer comprises housing, valve body, capsule and bacterial type valve, described shell one end sealing, the other end is provided with described valve body, and this valve body is connected with hydraulic testpump export pipeline, described capsule is located at enclosure interior, described bacterial type valve valve rod is located in valve body, valve emits and is positioned at housing, it is characterized in that, described bacterial type valve valve rod lower end is connected with dividing plate, valve inner separates along export pipeline water (flow) direction by dividing plate, described dividing plate is provided with damping hole,
Fluid encounters dividing plate after entering valve body, sub-fraction fluid directly flows out from damping hole, most fluid is under dividing plate intercepts in addition, capsule is rushed at along the gap between bacterial type valve side and valve body, after capsule absorption portion energy, to return in valve body along the gap swash of wave between bacterial type valve opposite side and valve body and flow out.
2. a kind of low pulse series connection bellows buffer according to claim 1, it is characterized in that, the upper end of described capsule is fixed on housing, and lower end is free end, and the valve of lower end and bacterial type valve is provided with interval between emitting.
3. a kind of low pulse series connection bellows buffer according to claim 1, it is characterized in that, described dividing plate is vertically arranged relative to direction of flow in pipeline.
4. a kind of low pulse series connection bellows buffer according to claim 1, it is characterized in that, the gap area between described bacterial type valve side and valve body is 9 times of the area of damping hole.
5. a kind of low pulse series connection bellows buffer according to claim 1, it is characterized in that, described capsule is nitrile butadiene rubber capsule.
6. a kind of low pulse series connection bellows buffer according to claim 1, is characterized in that, filling gas in described capsule, and the inflation pressure in capsule is described buffer determines 55 ~ 65% of working pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410541974.0A CN104373741A (en) | 2014-10-14 | 2014-10-14 | Low-pulsation series capsule type buffer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410541974.0A CN104373741A (en) | 2014-10-14 | 2014-10-14 | Low-pulsation series capsule type buffer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104373741A true CN104373741A (en) | 2015-02-25 |
Family
ID=52552822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410541974.0A Pending CN104373741A (en) | 2014-10-14 | 2014-10-14 | Low-pulsation series capsule type buffer |
Country Status (1)
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|---|---|
| CN (1) | CN104373741A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106523841A (en) * | 2016-11-04 | 2017-03-22 | 珠海格力节能环保制冷技术研究中心有限公司 | Fluid buffering device, fluid distributor, compressor and heat exchanging device |
| CN107940158A (en) * | 2017-12-08 | 2018-04-20 | 李笑达 | Fluid filter and its system |
| CN108644087A (en) * | 2018-06-25 | 2018-10-12 | 杭州新亚低温科技有限公司 | Device is stabilized in super-low liquid pulse |
| CN109780361A (en) * | 2019-01-28 | 2019-05-21 | 大连大学 | A kind of pipeline wideband fluid pressure pulse damper |
| WO2019134520A1 (en) * | 2018-01-02 | 2019-07-11 | 美的集团股份有限公司 | Water flow pressure pulsation attenuation device and water appliance having same |
| CN110114536A (en) * | 2016-12-28 | 2019-08-09 | 3伊弗洛股份制有限公司 | Damp valve cell |
| CN110748535A (en) * | 2018-07-05 | 2020-02-04 | 曼纽尔·卡尔·希梅诺 | Pulsation damper |
| CN110905866A (en) * | 2019-11-08 | 2020-03-24 | 陕西航天动力高科技股份有限公司 | Single buffer at outlet of diaphragm pump |
| CN110939559A (en) * | 2019-11-08 | 2020-03-31 | 陕西航天动力高科技股份有限公司 | Diaphragm pump buffer system |
| CN117628308A (en) * | 2024-01-25 | 2024-03-01 | 日照艾迪尔流体设备有限公司 | Pulsation damper and testing device thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3782418A (en) * | 1971-11-03 | 1974-01-01 | Greer Hydraulics Inc | Pressure pulse dampener device |
| US3857413A (en) * | 1971-11-03 | 1974-12-31 | Greer Hydraulics Inc | Pressure pulse dampener device |
| CN203257768U (en) * | 2013-05-06 | 2013-10-30 | 布柯玛蓄能器（天津）有限公司 | Mass flow bladder type energy accumulator |
-
2014
- 2014-10-14 CN CN201410541974.0A patent/CN104373741A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3782418A (en) * | 1971-11-03 | 1974-01-01 | Greer Hydraulics Inc | Pressure pulse dampener device |
| US3857413A (en) * | 1971-11-03 | 1974-12-31 | Greer Hydraulics Inc | Pressure pulse dampener device |
| CN203257768U (en) * | 2013-05-06 | 2013-10-30 | 布柯玛蓄能器（天津）有限公司 | Mass flow bladder type energy accumulator |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106523841A (en) * | 2016-11-04 | 2017-03-22 | 珠海格力节能环保制冷技术研究中心有限公司 | Fluid buffering device, fluid distributor, compressor and heat exchanging device |
| CN106523841B (en) * | 2016-11-04 | 2019-08-20 | 珠海格力节能环保制冷技术研究中心有限公司 | Fluid cushion device, dispenser, compressor and heat exchange equipment |
| CN110114536B (en) * | 2016-12-28 | 2021-10-26 | 3伊弗洛股份制有限公司 | Damping valve unit |
| CN110114536A (en) * | 2016-12-28 | 2019-08-09 | 3伊弗洛股份制有限公司 | Damp valve cell |
| CN107940158A (en) * | 2017-12-08 | 2018-04-20 | 李笑达 | Fluid filter and its system |
| WO2019134520A1 (en) * | 2018-01-02 | 2019-07-11 | 美的集团股份有限公司 | Water flow pressure pulsation attenuation device and water appliance having same |
| CN108644087A (en) * | 2018-06-25 | 2018-10-12 | 杭州新亚低温科技有限公司 | Device is stabilized in super-low liquid pulse |
| CN110748535A (en) * | 2018-07-05 | 2020-02-04 | 曼纽尔·卡尔·希梅诺 | Pulsation damper |
| CN109780361A (en) * | 2019-01-28 | 2019-05-21 | 大连大学 | A kind of pipeline wideband fluid pressure pulse damper |
| CN110939559A (en) * | 2019-11-08 | 2020-03-31 | 陕西航天动力高科技股份有限公司 | Diaphragm pump buffer system |
| CN110905866B (en) * | 2019-11-08 | 2021-09-28 | 陕西航天动力高科技股份有限公司 | Single buffer at outlet of diaphragm pump |
| CN110905866A (en) * | 2019-11-08 | 2020-03-24 | 陕西航天动力高科技股份有限公司 | Single buffer at outlet of diaphragm pump |
| CN117628308A (en) * | 2024-01-25 | 2024-03-01 | 日照艾迪尔流体设备有限公司 | Pulsation damper and testing device thereof |
| CN117628308B (en) * | 2024-01-25 | 2024-04-09 | 日照艾迪尔流体设备有限公司 | Pulsation damper and testing device thereof |
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Application publication date: 20150225 |