CN115199375A - Filter assembly and engineering machinery - Google Patents
Filter assembly and engineering machinery Download PDFInfo
- Publication number
- CN115199375A CN115199375A CN202211006664.XA CN202211006664A CN115199375A CN 115199375 A CN115199375 A CN 115199375A CN 202211006664 A CN202211006664 A CN 202211006664A CN 115199375 A CN115199375 A CN 115199375A
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- bypass valve
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- outlet
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- 239000003921 oil Substances 0.000 claims abstract description 181
- 239000010705 motor oil Substances 0.000 claims abstract description 56
- 239000010865 sewage Substances 0.000 claims abstract description 5
- 230000007246 mechanism Effects 0.000 claims description 28
- 238000007789 sealing Methods 0.000 claims description 27
- 230000004888 barrier function Effects 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 210000001503 joint Anatomy 0.000 claims description 2
- 238000003780 insertion Methods 0.000 description 8
- 230000037431 insertion Effects 0.000 description 8
- 239000010721 machine oil Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000001914 filtration Methods 0.000 description 5
- 239000012535 impurity Substances 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000010734 process oil Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
- F01M11/03—Mounting or connecting of lubricant purifying means relative to the machine or engine; Details of lubricant purifying means
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Abstract
The invention provides a filter assembly and engineering machinery, the filter assembly comprises: the filter base is provided with a sump oil inlet, a sump oil outlet, a clean oil inlet and a clean oil outlet; the filter is arranged on the filter base and comprises a shell and a filter element, and the inner cavity of the shell is divided into a sewage cavity and a clean oil cavity by the filter element; the bypass valve is arranged on the filter base and comprises a bypass valve seat, a bypass valve core and a first resetting piece, and the bypass valve seat is provided with a bypass valve inlet, a bypass valve outlet and a pressure discharge port; the bypass valve core is movably arranged in the bypass valve seat so as to communicate the bypass valve inlet and the bypass valve outlet when the pressure difference between the dirty oil inlet and the clean oil outlet reaches a preset value; an inner cavity formed by the bypass valve seat and the bypass valve core in an enclosing mode is communicated with the clean oil outlet through a pressure discharge port; the first reset piece is used for providing a reset force for the bypass valve core. When the filter assembly is applied, if the filter element is blocked, engine oil can be smoothly guided into the engine through the bypass valve, and normal operation of the engine is guaranteed.
Description
Technical Field
The invention relates to the technical field of engine oil filtration, in particular to a filter assembly and engineering machinery.
Background
The oil filter is used for filtering metal impurities, carbon deposition and the like in the engine oil, and an engine is prevented from being damaged. At present, when the oil filter is installed, the installation space of the engine is limited, or the oil filter is not directly installed on the engine for the convenience of later maintenance, but an external oil filter assembly is arranged.
The oil filter assembly comprises an oil filter and a filter base, wherein the oil filter is usually inversely arranged on the filter base. However, when the oil filter assembly having such a structure is used, engine wear is often caused due to oil supply problems. For example, if the filter element becomes clogged during use of the oil filter, the oil will not pass through the filter element, which may result in a lack of oil lubrication to the engine and wear of the engine.
Disclosure of Invention
Therefore, the invention aims to overcome the defect that the engine oil filter assembly in the prior art is easy to wear due to the problem of engine oil supply, and provides a filter assembly and engineering machinery.
In order to solve the above problems, the present invention provides a filter assembly including a filter base, a filter, and a bypass valve. Wherein, a dirty oil inlet and a dirty oil outlet which are communicated with each other and a clean oil inlet and a clean oil outlet which are communicated with each other are arranged on the filter base; the filter is arranged on the filter base and comprises a shell and a filter element arranged in the shell, the inner cavity of the shell is divided into a dirty oil cavity and a clean oil cavity by the filter element, the dirty oil cavity is communicated with a dirty oil outlet, and the clean oil cavity is communicated with a clean oil inlet; the bypass valve is arranged on the filter base and comprises a bypass valve seat, a bypass valve core and a first reset piece, wherein a bypass valve inlet, a bypass valve outlet and a pressure discharge port are formed in the bypass valve seat, the bypass valve inlet is communicated with the dirty oil inlet, and the bypass valve outlet is communicated with the clean oil outlet; the bypass valve core is movably arranged in the bypass valve seat so as to communicate the bypass valve inlet with the bypass valve outlet when the pressure difference between the dirty oil inlet and the clean oil outlet reaches a preset value; an inner cavity formed by the bypass valve seat and the bypass valve core in an enclosing mode is communicated with the clean oil outlet through a pressure discharge port; the first reset member is supported between the bypass valve seat and the bypass valve spool to provide a reset force to the bypass valve spool.
Optionally, an oil guide cavity for the bypass valve core to move up and down is formed in the bypass valve seat, an upper end opening of the oil guide cavity forms a bypass valve inlet, a bypass valve outlet and a pressure discharge port are formed in a side wall of the oil guide cavity, and the pressure discharge port is arranged closer to the lower end of the oil guide cavity than the bypass valve outlet.
Optionally, an internal threaded hole is formed in the filter base, and the bypass valve seat comprises an external threaded section in threaded connection with the internal threaded hole.
Optionally, the external thread section extends outwards to form an end head arranged outside the filter base, and a sealing gasket is arranged between the end head and the filter base.
Optionally, the filter element comprises an outer filter element and an inner filter element, the inner filter element being nested inside the outer filter element. Wherein, for the engine oil filtered by the outer filter element, one part flows to the clean oil inlet after being filtered by the inner filter element, and the other part directly flows to the clean oil inlet through the inner cavity of the inner filter element.
Optionally, a cover plate is arranged at the bottom of the filter, the filter is connected with the filter base through the cover plate, and a filter oil inlet is formed in the cover plate; and a check valve is installed on the filter base, and the sump oil outlet is communicated with the filter oil inlet through the check valve.
Optionally, the filter further comprises: the inner sealing ring is arranged between the bottom of the filter element and the cover plate; and the pressing piece is arranged between the top of the filter element and the shell to provide downward pressure for the filter element.
Optionally, the filter base includes a filter mounting mechanism, the filter mounting mechanism is in butt joint with the filter, an annular enclosure is arranged at the top of the filter mounting mechanism, the annular enclosure is sleeved outside the bottom of the filter, and an oil discharge port is formed in a circumferential wall body of the annular enclosure.
Optionally, a filter sealing ring is arranged at the joint of the filter and the filter mounting mechanism, and the annular enclosure is arranged higher than the filter sealing ring.
The invention also provides engineering machinery comprising the filter assembly.
The invention has the following advantages:
1. when a filter element of the filter is blocked, engine oil cannot flow into the clean oil cavity, the pressure difference between the dirty oil inlet and the clean oil outlet can be increased to a preset value, and a bypass valve core of the bypass valve correspondingly moves to communicate the bypass valve inlet and the bypass valve outlet. In the process of moving the bypass valve core, the bypass valve core can compress an inner cavity formed by the bypass valve core and the bypass valve seat in an enclosing mode. Because the pressure discharge port is arranged on the bypass valve seat, engine oil or gas in the inner cavity can be discharged through the pressure discharge port, the bypass valve core is ensured to move smoothly, and the inlet of the bypass valve is communicated with the outlet of the bypass valve. As a result, the engine oil can flow into the engine through the bypass valve, ensuring normal operation of the engine.
2. By installing the check valve on the filter base, when the engine stops running, the check valve can be used for preventing engine oil in the dirty oil cavity from flowing back to the filter base from the oil inlet of the filter without being filtered, so that the cleanness of the engine oil used by the engine is ensured.
3. Through the setting of outer filter core and interior filter core can carry out double filtration to some machine oil, reduce the impurity in this part machine oil to further reduce engine wear, improve the life-span of engine. Meanwhile, the other part of engine oil directly flows to the clean oil inlet through the inner cavity of the inner filter element, so that the resistance borne by the engine oil during flowing can be reduced, the engine oil flows more smoothly, and the flowing continuity of the engine oil is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic front view of a filter assembly according to an embodiment of the present disclosure;
FIG. 2 is an elevational cross-sectional structural schematic of a filter assembly according to an embodiment of the present disclosure;
FIG. 3 illustrates a partial side cross-sectional structural view of a filter assembly according to an embodiment of the present disclosure;
FIG. 4 is a schematic cross-sectional view of a bypass valve in a filter assembly according to an embodiment of the present disclosure;
FIG. 5 is a side cross-sectional structural view of a filter assembly provided by an embodiment of the present invention.
Description of reference numerals:
10. a filter base; 11. a filter mounting mechanism; 111. a dirty oil outlet; 112. a clean oil inlet; 113. an annular enclosure; 1131. an oil discharge port; 114. an externally threaded post; 12. an oil guide mechanism; 121. a dirty oil inlet; 122. a clean oil outlet; 123. a lug; 1231. connecting holes; 13. inserting holes;
20. a filter; 21. a housing; 211. a sewage cavity; 212. a clean oil chamber; 22. a filter element; 221. an outer filter element; 2211. an outer center tube; 2212. outer filter paper; 2213. an outer upper end cap; 2214. a lower end cover; 222. an inner filter element; 2221. an inner center tube; 2222. internal filter paper; 2223. an inner upper end cap; 23. a cover plate; 231. an oil inlet of the filter; 24. an inner seal ring; 25. a compression member; 26. a seal ring seat; 27. a filter seal ring;
30. a bypass valve; 31. a bypass valve seat; 311. a bypass valve inlet; 312. a bypass valve outlet; 313. a pressure discharge port; 314. an external threaded section; 315. a tip; 32. a bypass spool; 33. a first reset member; 34. a sealing gasket; 35. a retainer ring;
40. a base plug; 50. a base seal ring; 60. a check valve; 61. a check valve seat; 62. a check valve core; 63. a second reset member.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Furthermore, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The present embodiment provides a filter assembly, as shown in fig. 1-3, that includes a filter base 10, a filter 20, and a bypass valve 30.
Wherein, a dirty oil inlet 121 and a dirty oil outlet 111 which are communicated with each other are arranged on the filter base 10, and a clean oil inlet 112 and a clean oil outlet 122 which are communicated with each other are also arranged on the filter base 10. The filter 20 is installed on the filter base 10, the filter 20 includes a housing 21 and a filter element 22 disposed in the housing 21, the filter element 22 divides an inner cavity of the housing 21 into a dirty oil chamber 211 and a clean oil chamber 212, the dirty oil chamber 211 is communicated with the dirty oil outlet 111, and the clean oil chamber 212 is communicated with the clean oil inlet 112.
The bypass valve 30 is installed on the filter base 10, and the bypass valve 30 includes a bypass valve seat 31, a bypass valve body 32, and a first restoring member 33. The bypass valve seat 31 is provided with a bypass valve inlet 311, a bypass valve outlet 312 and a pressure discharge port 313, the bypass valve inlet 311 is communicated with the dirty oil inlet 121, and the bypass valve outlet 312 is communicated with the clean oil outlet 122; a bypass valve spool 32 is movably disposed in the bypass valve seat 31 to communicate the bypass valve inlet 311 and the bypass valve outlet 312 when a pressure difference between the dirty oil inlet 121 and the clean oil outlet 122 reaches a preset value; an inner cavity formed by the bypass valve seat 31 and the bypass valve core 32 in an enclosing mode is communicated with the clean oil outlet 122 through a pressure discharge port 313; the first restoring member 33 is supported between the bypass valve seat 31 and the bypass valve spool 32 to provide a restoring force to the bypass valve spool 32.
Note that, in the drawing given in this embodiment, the hollow arrows indicate the flow direction of the oil.
With the above arrangement, referring to fig. 2, when the filter 20 is in normal use, unfiltered engine oil flows into the filter base 10 through the dirty oil inlet 121, and then flows into the dirty oil cavity 211 of the filter 20 through the dirty oil outlet 111; then, the engine oil flows into the clean oil chamber 212 after being filtered by the filter element 22, and then flows into the filter base 10 through the clean oil inlet 112; finally, the filtered engine oil flows out of the filter base 10 through the clean oil outlet 122, and further flows into the engine for use by the engine.
With reference to fig. 3 and 4, when the filter 20 is used, if the filter element 22 is blocked, the engine oil cannot flow into the clean oil chamber 212, the pressure difference between the dirty oil inlet 121 and the clean oil outlet 122 increases to a predetermined value, and the bypass valve element 32 is pressurized to move accordingly to communicate the bypass valve inlet 311 and the bypass valve outlet 312. During the movement of the bypass valve element 32, the bypass valve element 32 compresses the inner cavity formed by the bypass valve element 32 and the bypass valve seat 31. Since the pressure discharge port 313 is provided in the bypass valve seat 31, the oil or gas in the internal cavity can be discharged through the pressure discharge port 313, and the bypass valve body 32 can be ensured to move smoothly, so that the bypass valve inlet 311 and the bypass valve outlet 312 are kept communicated. As a result, the engine oil can flow into the engine through the bypass valve 30, ensuring normal operation of the engine.
If the filter element 22 is not blocked, the pressure difference between the dirty oil inlet 121 and the clean oil outlet 122 is lower than the preset value, and the first reset piece 33 can provide reset force for the bypass valve core 32, so that the bypass valve core 32 can block the bypass valve inlet 311 and the bypass valve outlet 312. At this time, the oil does not flow into the engine through the bypass valve 30.
Next, the structure of the bypass valve 30 will be further described.
As shown in fig. 3, the bypass valve 30 is detachably mounted on the filter base 10. In this embodiment, the filter base 10 is provided with an internal threaded hole, and the bypass valve seat 31 is provided with a matching external threaded section 314. The external thread section 314 is screw-coupled with the internal thread hole so that the bypass valve 30 is detachably fixed to the filter base 10.
Further, as shown in fig. 4, an oil guide chamber is provided in the bypass valve seat 31, and a bypass valve body 32 is provided in the oil guide chamber so as to be movable up and down. The upper end opening of the oil guide cavity forms a bypass valve inlet 311, and the side wall of the oil guide cavity is provided with a bypass valve outlet 312 and a pressure discharge port 313. The discharge pressure port 313 is disposed closer to the lower end of the bypass valve 30 than the bypass valve outlet 312.
At this time, the moving direction of the bypass valve element 32 is the gravity direction, and when the bypass valve element 32 moves downward, its own gravity can be used as a part of the pressure, so that the oil under the bypass valve element 32 is more smoothly discharged from the pressure discharge port 313, thereby ensuring the opening of the bypass valve 30 and improving the control accuracy.
In this embodiment, the bypass valve seat 31 further includes a head 315. The externally threaded section 314 extends outwardly to form a head 315 disposed outside the filter base 10, and a sealing gasket 34 is disposed between the head 315 and the filter base 10. Thus, the head 315 facilitates rotation of the bypass valve seat 31 to install or remove the bypass valve seat 31. At the same time, oil in the filter assembly is prevented from leaking out of the connection between the head 315 and the filter base 10 by the seal gasket 34.
In this embodiment, the cross-section of the bypass valve seat 31 is an inverted T shape, the lower portion thereof forms a head 315, the middle portion thereof forms an external threaded section 314, and the upper portion thereof forms an insertion section. The filter base 10 is further provided with an insertion hole 13 connected with the dirty oil inlet 121, and after the bypass valve seat 31 is fixed on the filter base 10, the insertion section can be inserted into the insertion hole 13 and tightly matched with the insertion hole 13 to form sealing.
It can be understood that after the oil enters the insertion hole 13 from the dirty oil inlet 121, the oil can only flow through the bypass valve 30 through the bypass valve inlet 311 due to the sealing arrangement between the insertion section and the insertion hole 13.
In this embodiment, the bypass spool 32 is provided as a T-bar. The elastic element is arranged as a spring and sleeved on the bypass valve core 32. When the filter element 22 is not blocked, the pressure difference between the dirty oil inlet 121 and the clean oil outlet 122 is lower than a preset value, the spring provides elasticity for the bypass valve core 32, and the bypass valve core 32 separates the bypass valve inlet 311 and the bypass valve outlet 312; when the filter element 22 is blocked, the pressure difference between the dirty oil inlet 121 and the clean oil outlet 122 is higher than a preset value, the spring is pressurized, and the bypass valve core 32 moves to communicate the bypass valve inlet 311 and the bypass valve outlet 312.
Furthermore, a securing ring 35 is also provided in the bypass valve 30, the securing ring 35 being arranged at the end of the bypass valve member 32 facing away from the spring element. The movement of the bypass valve member 32 is restricted by the retainer ring 35, and the bypass valve member 32 is prevented from coming out of the bypass valve seat 31.
Next, the structure of the filter base 10 and the filter 20 will be further described.
As for the filter base 10, as shown in fig. 1 and 2, it includes a filter mounting mechanism 11, and the filter mounting mechanism 11 is butted against the filter 20. An annular surrounding baffle 113 is further arranged at the top of the filter mounting mechanism 11, the annular surrounding baffle 113 is sleeved outside the bottom of the filter 20, and an oil outlet 1131 is formed in the circumferential wall body of the annular surrounding baffle 113.
When the filter 20 is used, the ring-shaped surrounding baffle 113 can prevent external foreign matters from entering the joint of the filter mounting mechanism 11 and the filter base 10 (namely the joint of the filter base 10 and the filter 20), so that a sealing ring arranged at the joint is protected, the sealing ring is prevented from being damaged, the sealing effect is ensured, and oil leakage of an engine is prevented. Afterwards, when the maintenance, dismantle filter 20, enclose fender 113 through the annular and can prevent that the machine oil in filter 20 from scattering the outflow all around, can guide the machine oil to flow through oil drain 1131 simultaneously to gather the machine oil that flows from filter 20, avoid causing environmental pollution.
In this embodiment, the filter mounting mechanism 11 is in a disk shape as a whole, and the annular surrounding barrier 113 is in a ring shape so as to be adapted to the shape of the filter 20.
Further, a partial region of the top of the circumferential wall of the annular barrier 113 is recessed downward to form an oil drain port 1131. According to this setting, can be convenient for process oil drain 1131, and can make the annular enclose the lower part that keeps off 113 and form certain space to can store a certain amount of machine oil through this space when dismantling filter 20, prevent that the diffusion effect is better.
Preferably, the oil drain port 1131 is provided with a wedge-shaped port with a large upper part and a small lower part, so that the oil can be discharged more smoothly, and the flow guiding effect is better. In this embodiment, the wedge is V-shaped.
In addition to the annular rail 113, as shown in fig. 3, an externally threaded post 114 is provided in the filter mounting mechanism 11, which is provided in the middle of the filter mounting mechanism 11. The filter mounting mechanism 11 can be screwed to the filter 20 by means of the externally threaded stud 114, so that the filter 20 is fixed to the filter base 10.
In this embodiment, it can be seen from the figure that the dirty oil outlet 111 is disposed between the annular enclosure 113 and the externally threaded column 114, and the clean oil inlet 112 is disposed in the externally threaded column 114.
As shown in fig. 2, the filter base 10 further includes an oil guide 12, and the dirty oil inlet 121 and the clean oil outlet 122 are disposed on the oil guide 12. The oil guide mechanism 12 is formed in an elongated tubular shape as a whole, and extends from the bottom of the filter attachment mechanism 11 to one side in the radial direction of the filter attachment mechanism 11. At this time, the filter base 10 is formed in an L shape as a whole. In this embodiment, the bypass valve 30 is mounted on the oil guide mechanism 12.
Preferably, the filter mounting mechanism 11 and the oil guide mechanism 12 are integrally arranged, and the whole structure is stable and firm.
As shown in fig. 2, the oil guide mechanism 12 is provided with a lug 123, and the lug 123 is provided with a connection hole 1231. Accordingly, a fastening member may be inserted through the connection hole 1231, and the filter base 10 may be fixed to the engine by the fastening member. In this embodiment, the oil guiding mechanism 12 is provided with 5 lugs 123, and each lug 123 is provided with a circular connecting hole 1231.
In the filter base 10 as a whole, a dirty oil passage and a clean oil passage are also provided in the filter base 10. Wherein, the dirty oil inlet 121 is communicated with the dirty oil outlet 111 through a dirty oil channel, and the clean oil inlet 112 is communicated with the clean oil outlet 122 through a clean oil channel.
In this embodiment, in order to ensure the sealing of the filter base 10, a base plug 40 and a base sealing ring 50 are further disposed on one end of the filter base 10 (i.e., the right end of the filter base 10) far away from the filter 20. Wherein, the tip of sump oil passageway and clean oil passageway is respectively pegged graft and is had a base end cap 40, all is provided with base sealing washer 50 between every base end cap 40 and filter base 10 to prevent that the engine oil from leaking.
In the filter 20, as shown in fig. 2, the housing 21 has a cylindrical structure with an open lower end, and the filter element 22 is disposed coaxially with the housing 21.
In this embodiment, the filter element 22 includes an outer filter element 221 and an inner filter element 222, and the inner filter element 222 is sleeved inside the outer filter element 221. Among them, for the engine oil filtered by the outer filter element 221, a part of the engine oil is filtered by the inner filter element 222 and then flows to the clean oil inlet 112, and the other part of the engine oil directly flows to the clean oil inlet 112 through the inner cavity of the inner filter element 222. Therefore, part of engine oil can be subjected to double filtration through the outer filter element 221 and the inner filter element 222, impurities in the part of engine oil are reduced, and therefore abrasion of an engine is further reduced, and the service life of the engine is prolonged. Meanwhile, the other part of the engine oil directly flows to the clean oil inlet 112 through the inner cavity of the inner filter element 222, so that the resistance applied to the flowing of the engine oil can be reduced, the flowing of the engine oil is smoother, and the flowing continuity of the engine oil is ensured.
Specifically, the outer cartridge 221 includes an outer center tube 2211 and an outer filter paper 2212. Wherein, the outer filter paper 2212 is sleeved outside the outer central tube 2211 to filter the engine oil; the wall of the outer center tube 2211 is provided with a plurality of through-flow holes for the oil to flow into the clean oil chamber 212. Further, an external upper end cap 2213 is arranged at the top of the outer filter element 221, and the external upper end cap 2213 is of a closed structure so as to prevent engine oil from leaking out of the top of the oil purifying cavity 212; a lower end cap 2214 is arranged at the bottom of the outer filter element 221, and an opening is formed in the middle of the lower end cap 2214, so that engine oil can flow from the clean oil cavity 212 to the clean oil inlet 112.
Further, as shown in fig. 2 and 3, a cover plate 23 is provided at the lower end opening of the housing 21. In this embodiment, the cover 23 is provided at a middle portion thereof with an internal thread bushing which is threadedly coupled with the external thread post 114 to detachably fix the filter 20 to the filter base 10. Meanwhile, a filter oil inlet 231 is formed in an area of the cover plate 23 opposite to the dirty oil outlet 111, and the dirty oil outlet 111 is communicated with the dirty oil cavity 211 through the filter oil inlet 231.
In the present embodiment, the filter 20 is further provided with an inner seal ring 24 and a pressing member 25. Wherein the inner sealing ring 24 is arranged between the bottom of the filter element 22 and the cover plate 23; a compression member 25 is disposed between the top of the cartridge 22 and the housing 21 to provide downward pressure on the cartridge 22. Therefore, the pressing piece 25 can provide pressure for the filter element 22, so that the filter element 22 presses the inner sealing ring 24 downwards, and therefore engine oil is prevented from leaking between the bottom of the filter element 22 and the cover plate 23, and the sealing effect is good. In particular, the pressing piece 25 is provided as a spring.
Preferably, with reference to fig. 3, a first annular protrusion is provided on top of the inner seal ring 24, which nests tightly within the lower end cap 2214 to form a seal; meanwhile, a second annular bulge is arranged at the bottom of the inner sealing ring 24, and the second annular bulge is inserted into a top gap formed by the connection of the cover plate 23 and the external threaded column 114 to form sealing.
In this embodiment, a seal ring seat 26 is further provided below the cover plate 23 along the circumferential direction of the housing 21, and the seal ring seat 26 is fixedly connected to the housing 21.
A filter seal 27 is mounted on the seal ring seat 26, and the annular baffle 113 is disposed higher than the filter seal 27. Therefore, when the filter 20 is used, the annular surrounding baffle 113 can prevent external foreign matters from entering the joint of the filter 20 and the filter base 10, prevent the filter sealing ring 27 from being damaged, ensure the sealing effect and prevent the oil leakage of an engine.
Preferably, an annular flat surface is provided on the top of the filter mounting mechanism 11 inside the annular enclosure 113, and the filter sealing ring 27 abuts against the annular flat surface to perform a sealing function when the filter 20 is butted against the filter mounting mechanism 11.
In other respects, as shown in fig. 5, a check valve 60 is further installed on the filter base 10, and the dirty oil outlet 111 communicates with the filter oil inlet 231 through the check valve 60. With this arrangement, when the engine stops operating, the check valve 60 prevents the engine oil in the dirty oil chamber 211 from flowing back to the filter base 10 from the filter oil inlet 231 without being filtered, thereby ensuring cleanliness of the engine oil used in the engine.
In the present embodiment, the check valve 60 includes a check valve seat 61, a check valve core 62, and a second restoring member 63. Wherein, the check valve seat 61 is installed on the filter base 10; the check spool 62 is connected to the check valve seat 61 via a second restoring member 63 and can move up and down. Taking fig. 5 as an example, a through-cut opening is arranged below the check valve core 62 on the filter base 10, when the engine is started, the pressure below the through-cut opening is increased, the check valve core 62 moves upwards, the through-cut opening is opened, and the engine oil normally flows; when the engine stops running, under the action of the elastic force of the second resetting piece 63 and the self gravity of the check valve core 62, the check valve core 62 blocks the through fracture to prevent the engine oil in the dirty oil cavity 211 from flowing back.
Preferably, the check valve spool 62 is provided as a ball and the second restoring member 63 is provided as a spring.
In the present embodiment, an oil storage space is also formed above the check valve 60. Therefore, when the engine stops running, a certain amount of engine oil can be stored through the oil storage space. After the engine is started, the engine oil can rapidly pass through the filter element 22 and then is supplied to the engine, so that the engine can obtain the oil rapidly, and the abrasion of the engine due to the lack of the engine oil is avoided.
The embodiment also provides a working machine which comprises the filter assembly. Specifically, the construction machine may be an excavator, or may be other construction machines such as a crane, and is not limited specifically herein.
In summary, the filter assembly and the engineering machine provided by the embodiment have at least the following advantages:
1. when the filter element 22 is clogged, the bypass valve element 32 moves and compresses the internal cavity defined by the bypass valve element 32 and the bypass valve seat 31. Because the pressure discharge port 313 is arranged on the bypass valve seat 31, the engine oil or gas in the inner cavity can be discharged through the pressure discharge port 313, the bypass valve core 32 can be ensured to move smoothly, and then the bypass valve inlet 311 and the bypass valve outlet 312 are communicated, so that the engine oil flows into the engine through the bypass valve 30, and the normal operation of the engine is ensured.
2. Through the arrangement of the outer filter element 221 and the inner filter element 222, part of engine oil can be subjected to double filtration, and impurities in the part of engine oil are reduced, so that the abrasion of the engine is further reduced, and the service life of the engine is prolonged. Meanwhile, the other part of the engine oil directly flows to the clean oil inlet 112 through the inner cavity of the inner filter element 222, so that the resistance applied to the flowing of the engine oil can be reduced, the flowing of the engine oil is smoother, and the flowing continuity of the engine oil is ensured.
3. When the engine stops running, the check valve 60 can prevent the engine oil in the dirty oil cavity 211 from flowing back to the filter base 10 from the filter oil inlet 231 without being filtered, so that the cleanness of the engine oil used by the engine is ensured.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. A filter assembly, comprising:
the filter comprises a filter base (10), wherein a sump oil inlet (121) and a sump oil outlet (111) which are communicated with each other and a clean oil inlet (112) and a clean oil outlet (122) which are communicated with each other are formed in the filter base (10);
the filter (20) is installed on the filter base (10), the filter (20) comprises a shell (21) and a filter element (22) arranged in the shell (21), the filter element (22) divides an inner cavity of the shell (21) into a sewage oil cavity (211) and a clean oil cavity (212), the sewage oil cavity (211) is communicated with the sewage oil outlet (111), and the clean oil cavity (212) is communicated with the clean oil inlet (112);
the bypass valve (30) is installed on the filter base (10), the bypass valve (30) comprises a bypass valve seat (31), a bypass valve core (32) and a first resetting piece (33), a bypass valve inlet (311), a bypass valve outlet (312) and a pressure discharge port (313) are formed in the bypass valve seat (31), the bypass valve inlet (311) is communicated with the dirty oil inlet (121), and the bypass valve outlet (312) is communicated with the clean oil outlet (122); the bypass valve core (32) is movably arranged in the bypass valve seat (31) to communicate the bypass valve inlet (311) and the bypass valve outlet (312) when the pressure difference between the dirty oil inlet (121) and the clean oil outlet (122) reaches a preset value; an inner cavity formed by the bypass valve seat (31) and the bypass valve core (32) in an enclosing mode is communicated with the clean oil outlet (122) through the pressure discharge port (313); the first reset piece (33) is supported between the bypass valve seat (31) and the bypass valve core (32) to provide a reset force for the bypass valve core (32).
2. The filter assembly of claim 1, wherein an oil guide cavity for the bypass valve core (32) to move up and down is provided in the bypass valve seat (31), an upper end opening of the oil guide cavity forms the bypass valve inlet (311), the side wall of the oil guide cavity is provided with the bypass valve outlet (312) and the pressure discharge port (313), and the pressure discharge port (313) is provided closer to a lower end of the oil guide cavity than the bypass valve outlet (312).
3. A filter assembly as claimed in claim 1, wherein the filter base (10) is provided with an internally threaded bore, and the bypass valve seat (31) includes an externally threaded section (314), the externally threaded section (314) being threadedly connected to the internally threaded bore.
4. A filter assembly as claimed in claim 3, wherein the externally threaded section (314) extends outwardly to form a head (315) disposed externally of the filter base (10), and a sealing gasket (34) is disposed between the head (315) and the filter base (10).
5. A filter assembly as claimed in claim 1, wherein the filter element (22) comprises an outer filter element (221) and an inner filter element (222), the inner filter element (222) being nested inside the outer filter element (221);
wherein, for the engine oil filtered by the outer filter element (221), one part of the engine oil flows to the clean oil inlet (112) after being filtered by the inner filter element (222), and the other part of the engine oil directly flows to the clean oil inlet (112) through the inner cavity of the inner filter element (222).
6. A filter assembly as claimed in claim 1, wherein a cover plate (23) is provided at the bottom of the filter (20), the filter (20) is connected to the filter base (10) through the cover plate (23), and a filter oil inlet (231) is provided on the cover plate (23);
the filter base (10) is provided with a check valve (60), and the sump oil outlet (111) is communicated with the filter oil inlet (231) through the check valve (60).
7. A filter assembly as claimed in claim 6, wherein the filter (20) further comprises:
an inner sealing ring (24) arranged between the bottom of the filter element (22) and the cover plate (23);
a compression member (25) disposed between the top of the cartridge (22) and the housing (21) to provide downward pressure on the cartridge (22).
8. A filter assembly as claimed in any one of claims 1 to 7, wherein the filter base (10) comprises a filter mounting mechanism (11), the filter mounting mechanism (11) is in butt joint with the filter (20), an annular surrounding baffle (113) is arranged at the top of the filter mounting mechanism (11), the annular surrounding baffle (113) is sleeved outside the bottom of the filter (20), and an oil discharge port (1131) is formed in the circumferential wall of the annular surrounding baffle (113).
9. A filter assembly as claimed in claim 8, wherein a filter sealing ring (27) is provided at the junction of the filter (20) and the filter mounting mechanism (11), the annular barrier (113) being disposed higher than the filter sealing ring (27).
10. A working machine comprising a filter assembly as claimed in any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211006664.XA CN115199375B (en) | 2022-08-22 | 2022-08-22 | Filter assembly and engineering machinery |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211006664.XA CN115199375B (en) | 2022-08-22 | 2022-08-22 | Filter assembly and engineering machinery |
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| CN115199375A true CN115199375A (en) | 2022-10-18 |
| CN115199375B CN115199375B (en) | 2024-08-27 |
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| CN115789025A (en) * | 2022-12-08 | 2023-03-14 | 安徽高博过滤科技有限公司 | Hydraulic oil filter assembly |
| CN116557107A (en) * | 2023-05-26 | 2023-08-08 | 马勒汽车技术（中国）有限公司 | Filter device and engine assembly with same |
| CN116677804A (en) * | 2023-05-26 | 2023-09-01 | 马勒汽车技术（中国）有限公司 | Oil filter bypass valve and oil filter system |
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| CN115789025A (en) * | 2022-12-08 | 2023-03-14 | 安徽高博过滤科技有限公司 | Hydraulic oil filter assembly |
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| CN116677804A (en) * | 2023-05-26 | 2023-09-01 | 马勒汽车技术（中国）有限公司 | Oil filter bypass valve and oil filter system |
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|---|---|
| CN115199375B (en) | 2024-08-27 |
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