WO2006018437A1 - High-pressure spiral filter - Google Patents
High-pressure spiral filter Download PDFInfo
- Publication number
- WO2006018437A1 WO2006018437A1 PCT/EP2005/054056 EP2005054056W WO2006018437A1 WO 2006018437 A1 WO2006018437 A1 WO 2006018437A1 EP 2005054056 W EP2005054056 W EP 2005054056W WO 2006018437 A1 WO2006018437 A1 WO 2006018437A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- spiral filter
- spiral
- wire
- filter element
- fluid
- Prior art date
Links
- 239000012530 fluid Substances 0.000 claims abstract description 29
- 239000002245 particle Substances 0.000 claims abstract description 18
- 239000007787 solid Substances 0.000 claims abstract description 17
- 238000004804 winding Methods 0.000 claims description 6
- 238000002347 injection Methods 0.000 abstract description 20
- 239000007924 injection Substances 0.000 abstract description 20
- 239000000446 fuel Substances 0.000 abstract description 10
- 238000002485 combustion reaction Methods 0.000 abstract description 6
- 239000007788 liquid Substances 0.000 abstract description 3
- 238000012986 modification Methods 0.000 abstract description 3
- 230000004048 modification Effects 0.000 abstract description 3
- 230000006735 deficit Effects 0.000 abstract description 2
- 238000001914 filtration Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/165—Filtering elements specially adapted in fuel inlets to injector
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/44—Edge filtering elements, i.e. using contiguous impervious surfaces
- B01D29/48—Edge filtering elements, i.e. using contiguous impervious surfaces of spirally or helically wound bodies
Definitions
- This invention is concerned with a spiral-structured filter developed to avoid clogging of capillary channels and holes in high pressure hydraulic systems having a precise mechanical structure by solid particles moving together with the liquid fluid circulating within the aforesaid system.
- the incoming high pressure fluid from filter inlet passes through such grooves cut at the edge of mounting piece and reaches the outside surface of the filter clement made of a spiral-wound wire.
- the fluid passing through capillary channels formed by the previously cut grooves on spiral-wound wire flows inward the filter element and from here transmitted out through the discharge end of the filter casing.
- the aforesaid capillary channels formed by the grooves cut on spiral-wound wire which forms the filter element catch the solid particles in the fluid and the filtration process is thus completed.
- pressure loss will be kept at minimum level.
- FIG. 1 A Spiral filter element mounted in filter casing by a mounting piece.
- Figure 1 B Wires with channels made thereon in circular or spiral shape.
- Figure 1 C Cross-section of a wire with a circular or square profile channel made thereon.
- FIG. 1 Spiral filter element formed by cylindrical or conical winding of a wire with channels made thereon.
- Figure 3 A Direction of flow of fluid passing through a spiral filter.
- FIG. 1 A the case where a spiral filter element (1) has been mounted in filter casing (2) with a mounting piece (3) is shown.
- a high pressure spiral filter being the subject matter of the invention, is composed of a casing part (2), a spiral filter element (1 ) and a mounting piece (3), which may be usually of screw type, to fix the spiral filter.
- the casing part of filter (2) has in general a cylindrical structure with its both ends open. Out of these two ends of the casing part, one is the inlet (4) of fluid under high pressure and the other one is the discharge end (5). Both end parts have been designed to be compliant with the hydraulic system connections used and in a manner not to cause any leakage under high fluid pressure.
- a number of grooves are cut at certain spacings on a wire (6) with smooth surface being resistant to corrosive effects, if any, of the fluid used.
- Such grooves may be in form of a circular channel (7), or they may be cut in spiral shape (8).
- the profile of grooves cut on the wire (6) may be in circular (9), square (10) or in any other form.
- the cross-section of a channel formed by such grooves (9, 10) when the wire surface (6) is covered should be thinner than the smallest channel in the hydraulic system connected with filter element outlet. Thus any solid particles in the fluid passing through a channel formed by the grooves (9, 10) which arc likely to clog the channels contained in the hydraulic system are caught.
- a wire (6) with grooves (7, 8, 9, 10) cut thereon can be wound in cylindrical (1 1 ) or conical (12) shape. No gap should be left in between the wire (6) forming the winding.
- the tight-wound spiral filter element (1) is placed coaxially in the aforesaid casing part (2).
- the spiral filter element (1) resting on the chamfered surface (13) provided at one end of the casing part (2) is fixed at the other end with a mounting piece (3) which is generally of screw type.
- a mounting piece (3) which is generally of screw type.
- the fluid under high pressure passes through the channels (14) cut on the mounting piece (3) in form of a groove and reaches a ring-shaped channel (15) formed by the internal surface of the casing part and the external surface of the spiral filter clement.
- a ring-shaped channel 15
- the fluid passing through thin groove channels (7, 8, 9 , 10) on the windings of wire which form the spiral filter clement (1) reaches the center (16) of the filter casing and of the filter element. Any solid particles contained in the fluid, which are greater in size than the cross-sectional area of the groove sections (9, 10) of spiral filter clement arc caught in the ring-shaped channel (15) formed by the internal surface of the casing part and the external surface of the spiral filter element.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The solid particles in a fluid used in high pressure hydraulic systems may cause undesirable pressure losses and structural impairments the in liquid fluid pattern injected through the injection holes, by reducing or clogging capillary channels and injection holes. This invention explains a spiral filter system that can be used in preventing such capillary channels and injector nozzle holes in the aforesaid systems to be clogged by the solid particles contained in the fluid. The main structure of the filter consists of a casing part (2), a spiral filter clement (1) and a mounting piece (3), which can be generally of screw type, to fix the spiral filter. When solid particles accumulate over time, the spiral filter can be easily dismounted and cleaned or replaced. It can be applied in a high pressure hydraulic system containing any kind of capillary channels and in usual fuel injection systems or the ones such as common rail or unit pump particularly used in internal combustion engines to protect injector nozzle holes against clogging, without making major structural modifications.
Description
DESCRIPTION
HIGH-PRESSURE SPIRAL FILTER
This invention is concerned with a spiral-structured filter developed to avoid clogging of capillary channels and holes in high pressure hydraulic systems having a precise mechanical structure by solid particles moving together with the liquid fluid circulating within the aforesaid system.
In high pressure hydraulic and injection systems, generally narrow channels and injection holes manufactured with very narrow tolerances are provided. Even a minimum change that may occur in the cross-sectional area of such channels and injection holes, in other words, a reduction, may cause undesirable losses in transfer of pressure of the fluid in the hydraulic system and undesirable impairments in the structure of cluster of liquid fluid injected through injection holes, which, in turn, leads to substantial performance losses in high pressure hydraulic systems and injection systems and even causes the systems to become completely inoperable. The most important reason for such reduction in cross- section of the channels and the injection holes that may occur in the course of time is the clogging of narrow passages by solid particles dragged together with the fluid used in the system. The injectors in high pressure injection systems that arc commonly used in internal combustion engines constitute an important example in this regard. In the aforesaid engines, in order to create a good mixture and obtain full combustion conditions in the cylinder, substantial developments have been achieved in the fuel injection systems. Particularly along with the start of using the developments in drilling methods (such as laser drilling) in mass production, the diameters of holes in injector nozzles provided in fuel injection systems have been gradually made smaller. However, the smaller hole diameters in the injector nozzle have entailed the exposure to a risk of complete or partial clogging of such holes even by very small solid particles in the fuel, which, in turn, causes the engines to get worse in performance or to become completely inoperable. Furthermore, a substantial increase occurs in the maintenance expenses of fuel injection equipment which are expensive systems. Solid particles contained in a fluid lead to similar
troubles in different-purpose high pressure hydraulic systems and injection equipment as well. In today's fuel injection systems, rod filters are used. Such rod filters positioned between the injector and the fuel system connection entries in common rail high pressure injection systems can catch solid particles in the fuel only unidimensionally and hence can not prevent passing of longer particles through the filter.
By this invention, a spiral filter that prevents clogging of capillary channels and injector nozzle holes in the aforesaid high pressure hydraulic systems and in injection equipment of any kind having a precise mechanical structure by solid particles in the fluid and that hence can be used in such systems is proposed and explained.
The main structure of such filter mentioned herein consists of a casing part, a spiral filter element and a mounting piece, which may generally be of screw type, to fix the spiral filter. The casing part of the filter has generally a cylindrical structure with both ends open, out of which, one is the inlet and the other one is the outlet of fluid. Both end parts have been designed compatibly with hydraulic system connections used and in a manner not to cause any leakage under high fluid pressure. Grooves arc cut on a wire with smooth surface resistant to corrosive effects, if any, of the fluid used and this wire is wound in spiral form to obtain filter element. After the aforesaid filter clement is placed in the casing part, it is generally fixed with a screw-type mounting piece. The incoming high pressure fluid from filter inlet passes through such grooves cut at the edge of mounting piece and reaches the outside surface of the filter clement made of a spiral-wound wire. The fluid passing through capillary channels formed by the previously cut grooves on spiral-wound wire flows inward the filter element and from here transmitted out through the discharge end of the filter casing. The aforesaid capillary channels formed by the grooves cut on spiral-wound wire which forms the filter element catch the solid particles in the fluid and the filtration process is thus completed. As the length of the channel section formed by the grooves cut on the wire which forms spiral filter element will be very short, pressure loss will be kept at minimum level. When accumulation of solid particles occurs over time, the system that can be produced cheaply due to its simple structure can be easily dismounted and cleaned or replaced. It can be applied in a high pressure hydraulic system containing any kind of capillary channels and in usual fuel injection systems or the ones such as common rail or unit pump particularly used in internal combustion engines to protect injector nozzle holes against clogging, without making major structural modifications. A
spiral filter element as explained above can catch thin cross-section, but longer solid particles which can not be caught by the previously mentioned rod filters commonly used in high pressure injection systems of internal combustion engines and hence a two- directional filtration process is achieved.
Drawings explaining the invention as as follows :
Figure 1 A. Spiral filter element mounted in filter casing by a mounting piece.
Figure 1 B. Wires with channels made thereon in circular or spiral shape.
Figure 1 C. Cross-section of a wire with a circular or square profile channel made thereon.
Figure 2 A. Spiral filter element formed by cylindrical or conical winding of a wire with channels made thereon.
Figure 2 B. Structure of a spiral filter element and mounting piece.
Figure 3 A. Direction of flow of fluid passing through a spiral filter.
Figure 3 B. Flow paths on a filter element made of spiral wire.
Detailed explanation of the invention :
In Figure 1 A, the case where a spiral filter element (1) has been mounted in filter casing (2) with a mounting piece (3) is shown. A high pressure spiral filter, being the subject matter of the invention, is composed of a casing part (2), a spiral filter element (1 ) and a mounting piece (3), which may be usually of screw type, to fix the spiral filter. The casing part of filter (2) has in general a cylindrical structure with its both ends open. Out of these two ends of the casing part, one is the inlet (4) of fluid under high pressure and the other one is the discharge end (5). Both end parts have been designed to be compliant with the hydraulic system connections used and in a manner not to cause any leakage under high fluid pressure. As shown in Figure 1 B, a number of grooves are cut at certain spacings on a wire (6) with smooth surface being resistant to corrosive effects, if any, of the fluid used.
Such grooves may be in form of a circular channel (7), or they may be cut in spiral shape (8). As shown in Figure 1 C, the profile of grooves cut on the wire (6) may be in circular (9), square (10) or in any other form. The cross-section of a channel formed by such grooves (9, 10) when the wire surface (6) is covered should be thinner than the smallest channel in the hydraulic system connected with filter element outlet. Thus any solid particles in the fluid passing through a channel formed by the grooves (9, 10) which arc likely to clog the channels contained in the hydraulic system are caught. As shown in Figure 2 A, a wire (6) with grooves (7, 8, 9, 10) cut thereon can be wound in cylindrical (1 1 ) or conical (12) shape. No gap should be left in between the wire (6) forming the winding. The tight-wound spiral filter element (1) is placed coaxially in the aforesaid casing part (2). The spiral filter element (1) resting on the chamfered surface (13) provided at one end of the casing part (2) is fixed at the other end with a mounting piece (3) which is generally of screw type. As shown in Figure 2 B, on the external surface of the mounting piece (3), which resembles a plug, proper grooves (14) which ensure passage of fluid have been cut. The fluid under high pressure passes through the channels (14) cut on the mounting piece (3) in form of a groove and reaches a ring-shaped channel (15) formed by the internal surface of the casing part and the external surface of the spiral filter clement. As shown in Figure 3 A, at the next stage, the fluid passing through thin groove channels (7, 8, 9 , 10) on the windings of wire which form the spiral filter clement (1) reaches the center (16) of the filter casing and of the filter element. Any solid particles contained in the fluid, which are greater in size than the cross-sectional area of the groove sections (9, 10) of spiral filter clement arc caught in the ring-shaped channel (15) formed by the internal surface of the casing part and the external surface of the spiral filter element. As seen from Figure 3 A, the filtered fluid reaching the center (16) of the filter casing and of the filter element is transferred to the hydraulic system through the discharge end (5) of filter casing. As shown in Figure 3 B, since the length (17) of channel section (9, 10) formed by the grooves on the windings of wire which form the spiral filter clement will be very short, filtration process is completed with minimum pressure loss. When accumulation of solid particles occurs over time, the system that can be produced cheaply due to its simple structure can be easily dismounted and cleaned or replaced. It can be applied in a high pressure hydraulic system containing any kind of capillary channels and in usual fuel injection systems or the ones such as common rail or unit pump particularly used in internal combustion engines to protect injector nozzle holes against clogging, without making major structural modifications.
Claims
1. A high pressure spiral filter as described above covers a system consisting of a casing part (2), a spiral filter element (1) and a mounting piece (3) that may generally be of screw type to fix the spiral filter, which can be used in any kind of hydraulic system.
2. It is a system as in Claim 1, in which the filter casing (2) in generally a cylindrical structure with both ends open, out of which, one is the inlet of fluid under high pressure (4) and the other end being the outlet (5), with a chamfer on one side of the internal surface of the casing on which the spiral filter clement is to rest (13).
3. It is a system as in Claims 1 and 2, in which a number of grooves (7, 8) arc cut at certain spacings on a wire (6) with smooth surface to form the spiral filter element (1 ).
4. It is a system as in Claims 1 and 3, in which the grooves on a wire (6) with smooth surface to form the spiral filter element (1) can be in form of a circular channel (7) or they can be cut in spiral (8) form, and the profile of such grooves cut on the wire can be circular (9), square (10) or in any other form.
5. It is a system as in Claims 1, 3 and 4, in which the channel cross-section formed by the grooves (9, 10) on wire section when the surface of the wire to form spiral filter element (1) is covered should be smaller than the smallest solid particle required to be filtered in the filter clement.
6. It is a system as in Claims 3, 4 and 5, in which the wire with grooves (7, 8, 9, 10) cut thereon is wound cylindrically (10) or conically ( 1 1) in spiral shape and no gap should be left in between the wire forming such winding.
7. It is a system compliant with the above requests, in which the spiral filter element (1 ) is placed so as- to rest on the chamfer surface (13) provided at one side of the casing part (2) and is fixed at the other side with a mounting piece (3) generally being of screw type, with grooves (14) cut on the outer surface thereof allowing the fluid to reach a ring-shaped channel ( 15) formed by the internal surface of the casing part (2) and the external surface of the spiral filter element ( 1).
S. It is compliant with the above claims, and while the fluid reaching the ring-shaped channel ( 15) formed by the internal surface of the casing part (2) and the external surface of the spiral filter clement (1 ) passes through thin and short ( 17) groove channels (7, 8, 9 , 10) on the windings of wire, which form the spiral filter element (1 ), with minimum pressure loss and reaches the center ( 16) of the filter casing (16), any solid particles contained in the fluid being greater in size than the cross-sectional area of groove sections (9, 10) of the spiral filter clement (1) arc caught in the ring-shaped channel (15) formed by the internal surface of filter casing and the external surface of spiral filter element.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TR2004/02051 | 2004-08-18 | ||
| TR2004/02051A TR200402051A1 (en) | 2004-08-18 | 2004-08-18 | Spiral high pressure filter. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2006018437A1 true WO2006018437A1 (en) | 2006-02-23 |
Family
ID=34975072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2005/054056 WO2006018437A1 (en) | 2004-08-18 | 2005-08-17 | High-pressure spiral filter |
Country Status (2)
| Country | Link |
|---|---|
| TR (1) | TR200402051A1 (en) |
| WO (1) | WO2006018437A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013003553A1 (en) * | 2011-06-30 | 2013-01-03 | Caterpillar Inc. | Edge filter having multiple filtering openings |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2000490A (en) * | 1932-03-07 | 1935-05-07 | Svenska Ackumulator Ab | Slit filter |
| FR786449A (en) * | 1934-05-01 | 1935-09-03 | Vickers Armstrongs Ltd | Improvements to fuel sprayers for internal combustion engines |
| FR922154A (en) * | 1945-12-18 | 1947-06-02 | Improvements to filters, especially for motor vehicle fuel | |
| GB846457A (en) * | 1959-04-15 | 1960-08-31 | John B Pillin Ltd | Improvements in or relating to filters for liquids |
| EP0678327A2 (en) * | 1994-04-19 | 1995-10-25 | Altenburger Electronic GmbH | Membrane for the microfiltration of suspensions or for gas separation |
| EP0995475A1 (en) * | 1998-09-18 | 2000-04-26 | Smc Corporation | Filter element |
-
2004
- 2004-08-18 TR TR2004/02051A patent/TR200402051A1/en unknown
-
2005
- 2005-08-17 WO PCT/EP2005/054056 patent/WO2006018437A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2000490A (en) * | 1932-03-07 | 1935-05-07 | Svenska Ackumulator Ab | Slit filter |
| FR786449A (en) * | 1934-05-01 | 1935-09-03 | Vickers Armstrongs Ltd | Improvements to fuel sprayers for internal combustion engines |
| FR922154A (en) * | 1945-12-18 | 1947-06-02 | Improvements to filters, especially for motor vehicle fuel | |
| GB846457A (en) * | 1959-04-15 | 1960-08-31 | John B Pillin Ltd | Improvements in or relating to filters for liquids |
| EP0678327A2 (en) * | 1994-04-19 | 1995-10-25 | Altenburger Electronic GmbH | Membrane for the microfiltration of suspensions or for gas separation |
| EP0995475A1 (en) * | 1998-09-18 | 2000-04-26 | Smc Corporation | Filter element |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013003553A1 (en) * | 2011-06-30 | 2013-01-03 | Caterpillar Inc. | Edge filter having multiple filtering openings |
Also Published As
| Publication number | Publication date |
|---|---|
| TR200402051A1 (en) | 2006-03-21 |
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