GB2250448A - Machine oil filtration unit - Google Patents
Machine oil filtration unit Download PDFInfo
- Publication number
- GB2250448A GB2250448A GB9025902A GB9025902A GB2250448A GB 2250448 A GB2250448 A GB 2250448A GB 9025902 A GB9025902 A GB 9025902A GB 9025902 A GB9025902 A GB 9025902A GB 2250448 A GB2250448 A GB 2250448A
- Authority
- GB
- United Kingdom
- Prior art keywords
- filter element
- oil
- filtration unit
- inlet
- nozzle
- 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.)
- Withdrawn
Links
- 238000001914 filtration Methods 0.000 title claims abstract description 34
- 239000010721 machine oil Substances 0.000 title claims description 6
- 239000003921 oil Substances 0.000 claims description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 239000002245 particle Substances 0.000 description 5
- 239000002253 acid Substances 0.000 description 2
- 239000010724 circulating oil Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 235000011149 sulphuric acid Nutrition 0.000 description 1
- 239000001117 sulphuric acid Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/14—Safety devices specially adapted for filtration; Devices for indicating clogging
- B01D35/153—Anti-leakage or anti-return valves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/08—Thickening liquid suspensions by filtration
- B01D17/10—Thickening liquid suspensions by filtration with stationary filtering elements
-
- 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
- B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
- B01D29/05—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements supported
- B01D29/055—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements supported ring shaped
-
- 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
- B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
- B01D29/90—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for feeding
-
- 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
- B01D29/96—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor in which the filtering elements are moved between filtering operations; Particular measures for removing or replacing the filtering elements; Transport systems for filters
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Abstract
An oil filtration unit comprises a housing 1 with a removable lid at the top and an inlet 3 and outlet 4 in its base. An internal nozzle 5 and the central supporting tube 9 of a water-absorbing filter element 6 conduct oil from inlet 3 to the upper end of the filter element for flow downwards therethrough. When the filter element is lifted from the housing, the seal 15 between nozzle 5 and tube 9 is broken, allowing oil inside tube 9 to flow directly to outlet 4 rather than being spilled. <IMAGE>
Description
MACHINE OIL FILTRATION UNIT
Field of the Invention
The present invention relates to a machine oil filtration unit and to a machine including such a filtration unit.
Review of most relevant prior art known to the Applicant
Engines and other machinery having a circulating oil system for lubrication, power or heat transfer, typically filter the oil to remove potentially damaging particles by passing the oil through a replaceable filter element. One form of filtration used is by-pass filtration, which is intended to increase the working life of the oil by filtering out particles down to a smaller size. An oil bleed is taken from the pressure side of the lubricating system and passed slowly through a filter element at a controlled rate. The filter is capable of filtering down to sub micron particle sizes. Particles, for example of carbon or metal, as small as three microns are capable of causing damage to an engine, and the filter removes these, extending the life of the engine.
A second function of the filter is to remove water from the oil. This function is extremely important as water in the oil becomes acidic (due to sulphuric acid), and chemicals have to be added to the oil to neutralise the acid. When these chemicals are exhausted, the engine is no longer protected from the effects of the acid. By removing the water, the oil remains stable for a much longer period, and the period between oil changes can be extended, possibly by up to a factor of ten, the oil filter element being changed more frequently.
Oil filtration units primarily used in industrial machinery are commonly mounted externally of the machinery for ease of renewal of the oil filter element. Such filtration units generally have both an oil inlet and oil outlet in a base of the filtration unit. The top end of the unit is removable to give access to the filter element. In use, oil flows through the inlet up a central passage defined within the core of the filter element and passes back down to the outlet filtering through the filter element. A problem frequently encountered with this arrangement is that pools of oil tend to collect within the unit leading to spillage of oil when the unit is opened to remove the filter element.
Summary of the Invention
A machine oil filtration unit, comprising:
(a) a filter chamber having an oil inlet, an oil outlet, and a
filter element removably located, in use, in a flow path
there between, said oil inlet and said oil outlet being
provided in a first end of the chamber adjacent a first
end of the filter element; and
(b) conduit means extending from the inlet to a second end
of the filter element such that oil to be filtered is
directed from the inlet to the second end of the filter
element to filter through the filter element to the outlet,
the conduit means being characterised in that a portion
thereof is separable from association with the inlet such
as to enable oil to drain from the conduit means and by
pass the filter element when the filtration unit is being
disassembled for removal of the filter element.
The conduit means preferably comprises a tube having a flange at one end for supporting the filter element, in use.
Preferably seal means are provided to seal between the conduit means and the periphery of the inlet, in use.
The conduit means may simply comprise the impermeable tubular core of an annular filter element.
Preferably the conduit means further comprises a nozzle extending inwardly into the chamber from the inlet.
Preferably where the chamber is provided with an open second end which is sealed in use by a lid which is bolted in place, the bolt threadedly engages with an end of the nozzle.
Brief Description of the Drawing.
The present invention will now be more particularly described by way of example and with reference to the single Figure, Figure 1 of the accompanying drawing.
Figure 1 is a cross sectional view of an oil filtration unit embodying the present invention
Description of the Preferred Embodiment
The filtration unit illustrated in Figure 1 comprises a filter chamber defined by a cannister 1 having an open end sealed by a lid 2. The end of the cannister 1 opposite the lid 2 serves as the base of the unit, in use. This end of the cannister 1 is penetrated by two apertures: an oil inlet 3; and an oil outlet 4. A nozzle 5 is provided extending from a threaded connection 17 with the bore of the inlet 3 inwardly of the base of the cannister 1. The nozzle 5 is provided with a circumferential flange at the end thereof adjacent the base of the cannister 1. This flange 19 seats against the base of the cannister 1 and is sealed there against by an O-ring 16. The end of the nozzle 5 nearest the lid 2 of the filtration unit is closed.The bore 20 of the nozzle 5 terminates partway along the nozzle 5 adjacent four radial apertures 18 in the wall of the nozzle 5. The closed end of the nozzle 5 is provided with a socket internally threaded to engage a bolt 11 for securing the lid 2 to the cannister 1. The bolt 11 passes through a central aperture in the lid 2 and is sealed against escape of oil by an
O-ring 13. The periphery of the lid 2 is sealed against the cannister 1 by a sealing member, or O-ring, 14 located within a groove extending around the periphery of the lid 2.
The nozzle 5 is sheaved in a filter element support tube 9 having a circumferential flange 20 at one end which seats upon the circumferential flange 19 of the nozzle 5. This support tube 9 extends the length of the nozzle 5 and serves in use to channel oil from the nozzle 5 beyond the end of the filter element remote from the inlet 3.
A water absorbing annular filter element 6 having a tubular core 10 is slideably seated over the support tube 9 and constrained in place by a lower annular grill 7 seated upon the flange 20 of the support tube 9 and an upper grill 8, itself constrained by the tightened lid 2 of the filtration unit. The upper grill 8 has an upturned rim 21 against which the washer 14 of the lid 2 presses when the lid is tightened in place by tightening of the bolt 11 within the threaded socket of the nozzle 5. The upper and lower grills 7 and 8 not only hold the filter element 6 against slippage, they also prevent congestion of the filtration unit or the oil circulatory system of the machinery with which the filtration unit is being used should the filter element begin to disintegrate during use.
Screw threads in the inlet end of the nozzle 5 and the bore of the outlet 4 enable couplings from the oil circulatory system of a machine to be fitted to the filtration unit. Oil from the machine enters the filtration unit via inlet 3 and travels up the bore of the nozzle 5 passing out through radial apertures 18 into the annular cavity between the nozzle 5 and the support tube 9. An O-ring 15 seals the seat between the support tube 9 and the nozzle 5 and thus the oil flows upwardly within the support tube 9 to pass out through radial apertures 19 in the wall of the support tube 9. The radial apertures 19 open onto the upper grill 8 overlying the filter 6. The oil then filters through the filter 6, passes out through the lower grill 7 and exits the chamber of the filtration unit via the outlet 4.
When it is desired to remove the filter element for replacement, or otherwise, the bolt 11 is first unscrewed from the nozzle 5 and the lid 2 removed from the cannister 1. The upper grill 8 may then be removed and the support tube 9 withdrawn from the cannister 1 bringing with it the lower grill 7 and the filter element 6 supported thereby. As soon as the support tube 9 is raised from its seat against the circumferential flange 19 of the nozzle 5 the seal formed by Oring 15 is broken and oil within the support tube is free to drain out through the outlet 4 by-passing the filter element 6. Thus, it can be seen that the separability of the support tube 9 and nozzle 5 composing the conduit by which oil is channelled to the remote end of the filter 6 from the inlet 3 mitigates the problem of oil spillage during removal of the filter element 6. The radial apertures 18 and 19 in the nozzle 5 and support tube 9, respectively, are advantageously located as near to the base end of the cannister 1 as practical. The lower the apertures 18 down the nozzle 5, the more effective the drainage of oil from the nozzle 5 to the outlet 4. The length of support tube above apertures 19 has the added advantage of providing a handling surface by which the support tube 9 may be grasped to withdraw it from cannister 1.
Although the present invention has been described with respect to one preferred embodiment numerous alternative embodiments are possible.
For example, the nozzle 5 may be ommitted. The inlet 3 need not be positioned centrally of the cannister. If the filter element is not of annular type the configuration of the conduit should be adapted accordingly. By way of improvement to minimise leakage, the upturned rim 21 of the upper grill 8 of the preferred embodiment of filtration unit may be chamfered to seat in a chamfered region of the neck of the cannister 1. An O-ring may be provided in the base of the filtration unit for sealing the unit against the machinery to which the unit is to be coupled.
For the majority of applications, a filter element used in the present invention ideally is fibrous and has high water absorbing capacity. The bulk of the filter element may comprise cellulosic or synthetic fibres.
Coniferous fibres provide a suitably high water absorptive capacity. In some applications, for example, where the circulating oil is intended to be mixed with water, the filter may be composed of non-water absorptive material. The filter element is preferably of a proprietary type which filters out particles as small as 0.5 microns.
Claims (7)
1. A machine oil filtration unit, comprising:
(a) a filter chamber having an oil inlet, an oil
outlet, and a filter element removably
located, in use, in a flow path there
between, said oil inlet and said oil outlet
being provided in a first end of the chamber
adjacent a first end of the filter element;
and
(b) conduit means extending from the inlet to a
second end of the filter element such that
oil to be filtered is directed from the inlet
to the second end of the filter element to
filter through the filter element to the
outlet, the conduit means being characterised
in that a portion thereof is separable from associaton with the inlet such as to enable
oil to drain from the conduit means and by
pass the filter element when the filtration
unit is being disassembled for removal of the
filter element.
2. A filtration unit as claimed in claim 1, wherein
the conduit means comprises a tube having a flange
at one end for supporting the filter element, in
use.
3. A filtration unit as claimed in claim 1, wherein
the conduit means comprises the impermeable
tubular core of an annular filter element.
4. A filtration unit as claimed in claim 1, 2 or 3,
wherein seal means are provided to seal between
the conduit means and the periphery of the inlet,
in use.
5. A filtration unit as claimed in claim 1, 2, 3 or
4, wherein the conduit means further comprises a
nozzle extending inwardly into the chamber from
the inlet.
6. A filtration unit as claimed in claim 5, wherein
the chamber is provided with an open second end
which is sealed in use by a lid which is bolted in
place by a bolt, the bolt threadedly engaging with
an end of the nozzle.
7. A machine oil filtration unit substantially as
described herein with reference to the drawing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9025902A GB2250448A (en) | 1990-11-28 | 1990-11-28 | Machine oil filtration unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9025902A GB2250448A (en) | 1990-11-28 | 1990-11-28 | Machine oil filtration unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9025902D0 GB9025902D0 (en) | 1991-01-09 |
| GB2250448A true GB2250448A (en) | 1992-06-10 |
Family
ID=10686145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9025902A Withdrawn GB2250448A (en) | 1990-11-28 | 1990-11-28 | Machine oil filtration unit |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2250448A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1114266A (en) * | 1964-11-16 | 1968-05-22 | Joseph John Russo | Oil cleaner |
| GB1236805A (en) * | 1968-10-10 | 1971-06-23 | Joseph John Russo | An oil cleaner |
| GB1476731A (en) * | 1974-10-18 | 1977-06-16 | Novomobiles Ltd | Combined casing and housing units for cartridges of oil filters |
| WO1988003432A1 (en) * | 1986-11-04 | 1988-05-19 | Eastman Kodak Company | Dry sump liquid filter |
-
1990
- 1990-11-28 GB GB9025902A patent/GB2250448A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1114266A (en) * | 1964-11-16 | 1968-05-22 | Joseph John Russo | Oil cleaner |
| GB1236805A (en) * | 1968-10-10 | 1971-06-23 | Joseph John Russo | An oil cleaner |
| GB1476731A (en) * | 1974-10-18 | 1977-06-16 | Novomobiles Ltd | Combined casing and housing units for cartridges of oil filters |
| WO1988003432A1 (en) * | 1986-11-04 | 1988-05-19 | Eastman Kodak Company | Dry sump liquid filter |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9025902D0 (en) | 1991-01-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |