GB2066984A - A pressure reducing device - Google Patents
A pressure reducing device Download PDFInfo
- Publication number
- GB2066984A GB2066984A GB8000130A GB8000130A GB2066984A GB 2066984 A GB2066984 A GB 2066984A GB 8000130 A GB8000130 A GB 8000130A GB 8000130 A GB8000130 A GB 8000130A GB 2066984 A GB2066984 A GB 2066984A
- Authority
- GB
- United Kingdom
- Prior art keywords
- apertures
- plate
- spindle
- aperture
- plates
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15D—FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS
- F15D1/00—Influencing flow of fluids
- F15D1/02—Influencing flow of fluids in pipes or conduits
-
- 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
- F16L55/02—Energy absorbers; Noise absorbers
- F16L55/027—Throttle passages
- F16L55/02736—Throttle passages using transversal baffles defining a tortuous path
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Seal Device For Vehicle (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The device comprises a body (1) defining a fluid flowpath (2) across which is transversely located a plurality of spaced baffle plates (7) attached to a spindle (3). Each baffle plate (7) defines an aperture (8) to permit fluid flow through the body (1) and the apertures (8) defined by adjacent plates (7) are staggered with respect to one another at opposite sides of the spindle (3). In this way fluid flowing through the device is constrained, after passing through the aperture (8) in one plate (7), to divide into two streams around the spindle (3) before passing through the aperture (8) defined by the next successive plate (7). <IMAGE>
Description
SPECIFICATION
A pressure reducing device
The present invention relates to a fluid pressure reducing device.
One conventional fluid pressure reducing device comprises a series of spaced baffle plates which are concave and are each provided with two apertures arranged opposite to one'another at the edges of the plate. Hence, as fluid flows through the device, jets of fluid issue from each of the apertures in the plates and the jets from the apertures in each one of the plates impinge on one another. In this way, a pressure reduction in the fluid is caused not only by constraining the fluid to flow through the apertures but also by the loss of energy caused when the two jets issuing from each baffle impinge.
In another conventional device, a series of baffle plates each provided with a plurality of apertures are spaced from one another. The reduction in fluid pressure can be adjusted by varying the size, number and spacing of the apertures and the spacing and number of the plates.
Disadvantages of the aforesaid conventional devices include the noisieness of the devices when in use and the complication in manufacture and adjustment of the devices for any given application.
The object of the present invention is to provide a pressure reducing device which overcomes the aforesaid disadvantages.
According to the present invention there is provided a pressure reducing device comprising a body defining a fluid flowpath across which is transversely located a plurality of spaced baffle plates attached to a spindle, each plate defining an aperture to permit fluid flow through the body and the apertures defined by adjacent plates being staggered with respect to one another at opposite sides of the spindle so that fluid flowing through the device is constrained after passing through the aperture in a first plate to divide into two streams around the spindle before passing through the aperture defined by the next successive plate.
Preferably, the apertures are each defined by an edge of the respective baffle plate and the adjacent surface of the body.
Preferably also, the body defines a fluid flowpath of circular cross-section, each of the baffle plates comprising a substantially circular disc from which a chordal portion is missing to define the respective aperture between the thus formed straight edge of the plate and the adjacent surface of the body.
Preferably also, the baffle plates are parallel, evenly spaced and coaxially mounted on the spindle.
Preferably also, the end baffle plate in the direction of fluid flow defines a pair of spaced circular apertures.
Preferably also, the leading baffle plate in the direction of fluid flow can be rotated around the spindle to vary the position of the apertures relative to the apertures in the other baffle plate or plates.
An example of the present invention will now be described with reference to the accompanying drawing in which:
Figure 1 is a transverse cross-section of a pressure reducing device according to the present invention;
Figure 2 is a cross-sectional view on the line Il-Il of Fig. 1; and
Figure 3 is a cross-sectional view on the line Ill-Ill of Fig. 1.
The pressure reducing device shown in the drawing comprises a body 1 defining a fluid flowpath 2 of circular cross-section. Each end of the body 1 is provided with a circular flange 1A whereby the device can be connected by bolts into a pipeline or to another device through which fluid can flow.
Located coaxially within the fluid flowpath 2 is a spindle 3 which is attached to a baffle plate 4 positioned at one end of the device.
The baffle plate 4 comprises a circular plate which is fitted into a rebated portion 5 of the body 1. The plate 4 is provided with a pair of spaced circular apertures 6 which are arranged on the same pitch circle diameter as one another at one side of the plate 4.
Attached to the spindle 3 within the body 1 is a plurality of spaced baffle plates 7. Each plate 7 comprises a circular disc which has a chordal portion missing therefrom. The plates 7 are of the same diameter as the diameter of the flowpath 2 and are arranged coaxially on the spindle 3 so that the plates 7 obturate the flowpath apart from the aperture 8 that is defined by the missing chordal portions. It will be appreciated that each plate 7 defines an aperture 8 which is bounded by the straight edge 9 of the plate 7 formed by the missing portion 8 and by the adjacent surface 10 of the body 1.
The plates 7 are arranged in the body 1 so that the apertures 8 are staggered with respect to one another at opposite sides of the spindle 3. The straight edges 9 of all the plates 7 are located parallel to one another and adjacent plates 7 are arranged opposed to one another by 180". The spacing of plates 7 one from another and between the end plate 4 and the adjacent plate 7 is constant and the plates 4 and 7 are held in position relative to one another by spacing collars (not shown).
Preferably, the leading baffle plate 7 in the direction of fluid flow can be rotated around the spindle 3 so that the position of its aperture 8 can be varied with respect to the apertures 6 and 8 in the other plates. This enables the pressure drop through the device to be varied. It is also possible to produce a device wherein all the baffle plates 7 are rotatable around the spindle 3 so that the positions of their apertures 8 can be varied with respect to the apertures 6 in the end baffle plate 4.
In a typical embodiment of the device, the apertures 8 may each have a cross-sectional area of 12% of the cross-sectional area of the flowpath 2 and the spacing of the plates 7 may be 0.2 of the diameter of the flowpath 2.
The apertures 6 in the end plate 4 may each be 0.25 of the diameter of the flowpath in diameter and located 60 apart in the lower half of the plate 4. In such a device, rotation of the leading baffle plate 7 to vary the position of its aperture 8 relative to the body 1 and the other apertures 6 and 8 can alter the pressure drop through the device by as much as 10%. It will, however, be appreciated that the pressure drop also depends on the size and spacing of the baffle.
In use, the baffle plates 4 and 7 constrain the fluid to flow a tortuous path through the body 1. As a result of the arrangement of the apertures 8, the fluid flow is caused repeatedly to separate into two streams to flow around the spindle between the plates 7.
Hence, at the apertures 8 the streams impinge, thus dissipating energy and reducing the fluid pressure.
The device of the present invention has several advantages including ease of manufacture at low cost and compact dimensions. The device is adjustable and the design of the device is such that the noise level produced by the device in use is less than most conventional devices.
It will be appreciated that whilst the apertures 8 of the baffle plates 7 have been described above as chordal apertures 8, other shapes of aperture may be employed. In addition, the edges 9 of the apertures 8 need not be straight and flat but may for example be chamfered .
Claims (10)
1. A pressure reducing device comprising a body defining a fluid flowpath across which is transversely located a plurality of spaced baffle plates attached to a spindle, each plate defining an aperture to permit fluid flow through the body and the apertures defined by adjacent plates being staggered with respect to one another at opposite sides of the spindle so that fluid flowing through the device is constrained after passing through the aperture in a first plate to divide into two streams around the spindle before passing through the aperture defined by the next successive plate.
2. A device as claimed in claim 1, in which the leading baffle plate in the direction of fluid flow can be rotated around the spindle to vary the position of its aperture relative to the apertures in the other baffle plate or plates.
3. A device as claimed in claim 1 or 2, in which the apertures are each defined by an edge of the respective baffle plate and the adjacent surface of the body.
4. A device as claimed in claim 3, in which the body defines a fluid flowpath of circular cross-section, each of the baffle plates comprising a substantially circular disi: from which a chordal portion is missing to define the respective aperture between the thus formed straight edge of the plate and~the adjacent surface of the body.
5. A device as claimed in any one of claims 1 to 4, in which the apertures each define a cross-sectional area which is 12% of the cross-sectional area of the fluid flowpath defined by the body.
6. A device as claimed in any one of claims 1 to 5, in which the baffle plates are parallel, evenly spaced and coaxially mounted on the spindle.
7. A device as claimed in claim 6, in which the spacing of the baffle plates is equal to 0.2 of the diameter of the fluid flowpath defined by the body.
8. A device as claimed in any one of claims 1 to 7, in which the end baffle plate in the direction of fluid flow defines a pair of spaced circular apertures.
9. A device as claimed in claim 8, in which the apertures defined by the end baffle plate have a diameter which is 0.25 of the diameter of the fluid flowpath defined by the body and are located 60 apart in one half of the baffle plate with respect to the longitudinal axis of said fluid flowpath.
10. A pressure reducing device substantially as hereinbefore described with reference to the accompanying drawing.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8000130A GB2066984B (en) | 1980-01-04 | 1980-01-04 | Pressure reducing device |
| FR8027328A FR2473104A3 (en) | 1980-01-04 | 1980-12-23 | EXTRUDED DECORATIVE ELEMENT |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8000130A GB2066984B (en) | 1980-01-04 | 1980-01-04 | Pressure reducing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2066984A true GB2066984A (en) | 1981-07-15 |
| GB2066984B GB2066984B (en) | 1983-05-25 |
Family
ID=10510418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8000130A Expired GB2066984B (en) | 1980-01-04 | 1980-01-04 | Pressure reducing device |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR2473104A3 (en) |
| GB (1) | GB2066984B (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0497146A1 (en) * | 1991-01-28 | 1992-08-05 | Siemens Aktiengesellschaft | Flow restrictor for solenoid valve |
| WO1995032385A1 (en) * | 1994-05-24 | 1995-11-30 | Massachusetts Institute Of Technology | Free rotor muffler |
| GB2458264A (en) * | 2008-03-10 | 2009-09-16 | Ford Global Tech Llc | Flow restrictor for use in the cooling system of an i.c. engine |
| CN103161789A (en) * | 2013-03-14 | 2013-06-19 | 浙江工业大学 | Bidirectional dual-redundancy proportional pressure regulating mechanism |
| CN103470903A (en) * | 2013-09-21 | 2013-12-25 | 苏州市吴中区曙光铜管厂 | Speed reducing pipe |
| CN111156363A (en) * | 2020-01-21 | 2020-05-15 | 佛山市沛力电器科技有限公司 | Replace water valve and prevent structure of whistling |
| CN113008731A (en) * | 2021-02-25 | 2021-06-22 | 辽宁省计量科学研究院 | Integral floating type floating ball weighing densimeter with temperature correction function |
| EP3943734A1 (en) * | 2020-07-24 | 2022-01-26 | Pratt & Whitney Canada Corp. | Hydraulic snubber insert for gas turbine engine and associated method of installation |
| US12085022B2 (en) | 2019-10-07 | 2024-09-10 | Pratt & Whitney Canada Corp. | Aircraft fluid system pressure variation attenuation |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107120489B (en) * | 2017-04-25 | 2019-05-21 | 扬中市众成管路配件有限公司 | A kind of restriction orifice component of high precision |
-
1980
- 1980-01-04 GB GB8000130A patent/GB2066984B/en not_active Expired
- 1980-12-23 FR FR8027328A patent/FR2473104A3/en active Granted
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0497146A1 (en) * | 1991-01-28 | 1992-08-05 | Siemens Aktiengesellschaft | Flow restrictor for solenoid valve |
| WO1995032385A1 (en) * | 1994-05-24 | 1995-11-30 | Massachusetts Institute Of Technology | Free rotor muffler |
| US5872342A (en) * | 1994-05-24 | 1999-02-16 | Massachusetts Institute Of Technology | Free rotor muffler |
| GB2458264A (en) * | 2008-03-10 | 2009-09-16 | Ford Global Tech Llc | Flow restrictor for use in the cooling system of an i.c. engine |
| US9488092B2 (en) | 2008-03-10 | 2016-11-08 | Jaguar Land Rover Limited | Flow control device |
| CN103161789A (en) * | 2013-03-14 | 2013-06-19 | 浙江工业大学 | Bidirectional dual-redundancy proportional pressure regulating mechanism |
| CN103470903A (en) * | 2013-09-21 | 2013-12-25 | 苏州市吴中区曙光铜管厂 | Speed reducing pipe |
| US12085022B2 (en) | 2019-10-07 | 2024-09-10 | Pratt & Whitney Canada Corp. | Aircraft fluid system pressure variation attenuation |
| CN111156363A (en) * | 2020-01-21 | 2020-05-15 | 佛山市沛力电器科技有限公司 | Replace water valve and prevent structure of whistling |
| EP3943734A1 (en) * | 2020-07-24 | 2022-01-26 | Pratt & Whitney Canada Corp. | Hydraulic snubber insert for gas turbine engine and associated method of installation |
| US11608927B2 (en) | 2020-07-24 | 2023-03-21 | Pratt & Whitney Canada Corp | Hydraulic snubber insert for gas turbine engine and associated method of installation |
| CN113008731A (en) * | 2021-02-25 | 2021-06-22 | 辽宁省计量科学研究院 | Integral floating type floating ball weighing densimeter with temperature correction function |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2473104B3 (en) | 1981-11-20 |
| GB2066984B (en) | 1983-05-25 |
| FR2473104A3 (en) | 1981-07-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PE20 | Patent expired after termination of 20 years |
Effective date: 20000102 |