CN1540174A - Low noise multiport valve with fixed fifferentail recuding-valve - Google Patents
Low noise multiport valve with fixed fifferentail recuding-valve Download PDFInfo
- Publication number
- CN1540174A CN1540174A CNA2003101083855A CN200310108385A CN1540174A CN 1540174 A CN1540174 A CN 1540174A CN A2003101083855 A CNA2003101083855 A CN A2003101083855A CN 200310108385 A CN200310108385 A CN 200310108385A CN 1540174 A CN1540174 A CN 1540174A
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- Prior art keywords
- valve
- way valve
- noise
- fixed differential
- pressure
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- 230000009467 reduction Effects 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 4
- 239000012530 fluid Substances 0.000 description 7
- 239000002828 fuel tank Substances 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 241001364096 Pachycephalidae Species 0.000 description 1
- 206010039740 Screaming Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
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- Details Of Valves (AREA)
Abstract
A low-noise multi-channel valve with a fixed-pressure reduction valve between oil return port and oil return pipeline is disclosed. Its advantages are high effect to reduce noise, no loss of pressure, and simple structure.
Description
Affiliated technical field
The present invention relates to a kind of multi-way valve, relate in particular to a kind of low noise multi-way valve with Fixed differential reducing valve.
Background technique
Multi-way valve is widely used in the running mechanisms such as engineering machinery, handling machinery, carry out the centralized control of a plurality of operation mechanisms, multiple control modes such as manual, electric liquid, electric-hydraulic proportion etc. are arranged, and the valve port structure of multi-way valve is generally guiding valve, non-complete all opening guiding valves and cone valve.Multi-way valve noise problem can occur in real work, show as sometimes to utter long and high-pitched sounds, scream, and influences the credit worthiness and the performance evaluation of whole set equipment.Because multi-way valve generally is positioned near the operator, noise also can increase the weight of operator's fatigue, reduction operation comfort.
Cavitation Noise is the main noise of multi-way valve, under different valve port opening, pressure reduction and flow, because valve port throttling action, low pressure area occurs at the valve port rear portion, when this local depression reached or be lower than fluid air separation pressure, the bubble in the fluid can be separated out, when bubble flows to downstream flow with oil, because pressure gos up, bubble can break, and forms noise.This Cavitation Noise and valve pocket magnitude of back pressure are in close relations.In real system, because differences such as return line setting type, pipeline length and annexes thereof, oil return resistance (back pressure) differs bigger; Along with the flow difference, back pressure also can change.
Experimental research shows that back pressure has decisive influence to noise, and noise is very responsive to back pressure, has a back pressure critical value for hydrovalve, makes the noise maximum, and when back pressure was slightly larger than this critical backing pressure value, the disappearance of screaming, noise reduced rapidly.
Summary of the invention
The purpose of this invention is to provide a kind of low noise multi-way valve with Fixed differential reducing valve, by Fixed differential reducing valve being set at the multi-way valve return opening, improve the pressure of multi-way valve oil return valve pocket, make all to be slightly larger than critical backing pressure value under the various valve port opening back pressure value of noise maximum (make), thereby reduce the noise of multi-way valve in this back pressure value under the various operating modes.
The technical solution used in the present invention is: comprise multi-way valve, be provided with a Fixed differential reducing valve between the return opening of multi-way valve and return line.
Said Fixed differential reducing valve is to be integrated in the multi-way valve or to be connected in the multi-way valve return line.
The useful effect that the present invention has is: the Fixed differential reducing valve on the multi-way valve return opening boosts to the oil return valve pocket in the multi-way valve, prevents the appearance of critical backing pressure value, thereby eliminates air pocket whistler and excessive noise.Fixed differential reducing valve makes pressure in the multi-way valve oil back chamber, and (0.5～1MPa), because pressure reduction is lower, the system pressure loss is less than the high steady state value of loine pressure of direct oil return all the time.The present invention is applicable to the noise control of various multi-way valve, the principle novelty, simple in structure, noise reduction is remarkable.Can be used for carrying out the centralized control of a plurality of operation mechanisms in the running mechanisms such as engineering machinery, handling machinery, multiple control modes such as manual, electric liquid, electric-hydraulic proportion etc. are arranged.
Description of drawings
Accompanying drawing is a systematic schematic diagram of the present invention.
In the accompanying drawing: 1. Fixed differential reducing valve assembly, 2. multi-way valve return opening, 3. Fixed differential reducing valve, 4. Fixed differential reducing valve pressure adjusting spring, 5. fuel tank, 6. return line, 7. first selector valve, 8. second selector valve, 9. one-way valve, 10. safety valve, 11. multi-way valve.
Embodiment
Multi-way valve because pressure reduction is big, back pressure is low, Cavitation Noise occurs easily in the oil return process, this noise is the main noise source of multi-way valve.Discovered that back pressure is to the The noise rule.The present invention is based on the noise control thought that the multi-way valve oil back chamber is boosted and avoids the appearance of critical backing pressure value, make multi-way valve under different valve port opening, flow size and various operating modes, eliminate and scream, present good low noise effect.
As shown in drawings, the present invention includes multi-way valve 11; Between the return opening 2 of multi-way valve 11 and return line 6, be provided with a Fixed differential reducing valve 1.
Said Fixed differential reducing valve 1 is to be integrated in the multi-way valve or to be connected in the multi-way valve return line.Set pressure is 0.5～1MPA.
The low noise multi-way valve working procedure of above-mentioned band Fixed differential reducing valve is as follows:
The oil return of each executive component is through the H point of the I of first selector valve 7 point, second selector valve 8, enter multi-way valve return opening 2, enter the import of the Fixed differential reducing valve 3 in the Fixed differential reducing valve assembly 1 again, under the setting pressure reduction of the pressure adjusting spring 4 of Fixed differential reducing valve 3, flow through Fixed differential reducing valve 3 and return line 6, get back to fuel tank 5.Because the effect of Fixed differential reducing valve 3, make the pressure of multi-way valve return opening 2 (also being the oil return valve pocket) be higher than definite value of Fixed differential reducing valve 3 outlet pressures all the time, this value is set by pressure adjusting spring 4, for fear of causing that excessive pressure loss Fixed differential reducing valve pressure is set at 0.5～1MPA.Such back pressure value can surpass the critical backing pressure value, makes Cavitation Noise greatly reduce.
When each selector valve in the multi-way valve 11 all is in meta, the oil that comes by oil hydraulic pump directly flows back to fuel tank 5 through hydraulic fluid port in each valve body and the Fixed differential reducing valve 3, at this moment oil liquid pressure is that the resistance of oil line pipe causes, hydraulic system is in unloading condition, noise problem can not appear, oil return is without Fixed differential reducing valve 3, so avoided the pressure loss during off-load.
Fluid enters multi-way valve 11, when not working, fluid directly through the meta of multi-way valve 11, return line 6 to fuel tank 5, executive component is connected on C, the D mouth of A, B mouth or first selector valve 7 of second selector valve 8 respectively into and out of hydraulic fluid port.One-way valve 9 in the multi-way valve 11 is owing to prevent the influence of load shock to pump, and safety valve 10 is used for preventing system overload.Include Fixed differential reducing valve 4 and some hydraulic fluid port that is connected with multi-way valve and duct in the Fixed differential reducing valve assembly 1.
Claims (2)
1. the low noise multi-way valve with Fixed differential reducing valve comprises multi-way valve (11), it is characterized in that: be provided with a Fixed differential reducing valve (1) between the return opening (2) of multi-way valve (11) and return line (6).
2. the low noise multi-way valve of band Fixed differential reducing valve according to claim 1 is characterized in that: said Fixed differential reducing valve (1) is to be integrated in the multi-way valve or to be connected in the multi-way valve return line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2003101083855A CN1540174A (en) | 2003-10-30 | 2003-10-30 | Low noise multiport valve with fixed fifferentail recuding-valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2003101083855A CN1540174A (en) | 2003-10-30 | 2003-10-30 | Low noise multiport valve with fixed fifferentail recuding-valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1540174A true CN1540174A (en) | 2004-10-27 |
Family
ID=34334643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2003101083855A Pending CN1540174A (en) | 2003-10-30 | 2003-10-30 | Low noise multiport valve with fixed fifferentail recuding-valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1540174A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114753993A (en) * | 2022-03-25 | 2022-07-15 | 江铃汽车股份有限公司 | Noise reduction method and system for automobile oil pump |
-
2003
- 2003-10-30 CN CNA2003101083855A patent/CN1540174A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114753993A (en) * | 2022-03-25 | 2022-07-15 | 江铃汽车股份有限公司 | Noise reduction method and system for automobile oil pump |
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| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |