JP2005246254A - Filtering medium joining structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a filtering medium joining structure of a filtration element with a simple structure and easy in manufacturing. <P>SOLUTION: The filtration element 1 is a hollow cylindrical body having an approximately cylindrical tube 11; a filtering medium arranged in a circumferential direction of the tube at the outside of the tube 11; and a partition wall W for dividing an inner peripheral space 60 of the tube 11 in an axial direction of the tube 11. Both ends of the partition wall W extend from the inner peripheral space 60 side to the filtering medium side to divide the filtering medium to a first filtering medium 51 and a second filtering medium 52. They are clamped and joined in the state where an end of the first filtering medium 51 and an end of the second filtering medium 52 are opposed to an outer peripheral side of the tube 11 and have a clamping part 24 for integrating the first filtering medium 51 and the second filtering medium 52. The clamping parts 24 are formed on both ends of the partition wall W. The end of the first filtering medium 51 and the end of the second filtering medium 52 are adhered by an adhesive means respectively in the state where they are opposed to each other and the clamping parts 24 clamp the adhesion part from the tube 11 side. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a filter medium joint structure, and more particularly to a filter medium joint structure in a filter element used as another oil filter element for an internal combustion engine.

  For example, in a filtration element for an internal combustion engine such as an automobile, the filtration accuracy is higher than a full-flow filter that removes solids such as combustion products and metal powder, and a full-flow filter, and cannot be removed by a full-flow filter. There is known a dual flow type filter that is combined with a bypass flow filter capable of removing such carbonaceous dirt and fine particles and accommodated in the same case. In such a dual flow filter, the fluid filtered by the full flow filter is sent to each sliding part of the engine, and the fluid filtered by the bypass flow filter is returned to the oil pan without being sent to the engine. It is.

  An example thereof is shown in FIGS. As shown in these drawings, the dual flow filter 100 includes an inner tube 111, an outer tube 131 provided outside the inner tube 111, and filter medium portions 151 and 152 disposed outside the outer tube 131. And a partition wall W ′ that divides a space defined by the inner tube 111 and the outer tube 131 in the axial direction of the hollow cylinder, and includes a partition wall W ′. The space is divided into spaces in which the first filter medium part 151 (full flow filter) and the second filter medium part 152 (bypass flow filter) are arranged.

Then, the fluid filtered from the outer peripheral side to the inner peripheral side of the first filter medium portion 151 flows out from the fluid passage opening 197 formed on one side in the vertical direction of the inner space of the inner tube 111. . On the other hand, the fluid filtered from the outer peripheral side to the inner peripheral side of the second filter medium portion 152 flows into the space defined by the inner tube 111 and the outer tube 131 and is formed on one side of the space. The fluid flows out of the fluid passage hole 199. Thus, the fluid filtered through each of the first filter medium part 151 and the second filter medium part 152 adjacent to each other with the partition wall W as a boundary flows out through different flow paths. This is also described in Patent Document 1.
JP 2000-84312 A

  However, the filtration element having the above structure is composed of a plurality of inner tubes and outer tubes, a partition wall, and the like, and has a large number of members, and is a joint portion between the first filter medium part and the second filter medium part. It was also complicated, and it took time to manufacture the filter element.

  In view of the above problems, an object of the present invention is to provide a filter medium joining structure in a filter element that has a simple structure and can be easily manufactured.

  In order to solve the above-described problems, a filter medium joining structure according to the present invention includes a substantially cylindrical tube, a filter medium disposed on the outer side of the tube in the circumferential direction of the tube, and an inner circumferential space of the tube in the axial direction of the tube. In the filtration element of a hollow cylindrical body configured to have a partition wall to be divided, both ends of the partition wall extend from the inner peripheral space side to the filter medium side, so that the filter medium is a first filter medium portion (for example, It divides | segments into the 1st filter medium 51 in embodiment, and the 2nd filter medium part (for example, 2nd filter medium 52 in embodiment), and the edge part of the 1st filter medium part and the 2nd filter medium part are on the outer peripheral side of a tube. The first filter medium part and the second filter medium part are integrated with each other by sandwiching and joining the two end parts facing each other.

  Further, in the filter medium joining structure having the above-described configuration, the sandwiching portions are formed at both ends of the partition wall, and the first filter medium portion end and the second filter medium portion end are respectively bonded by the bonding means in a state where they face each other. Thus, it is preferable that the clamping portion clamps the adhesive portion from the tube side.

  Further, in the filter medium joining structure configured as described above, the clamping part is composed of two clamping members, and the first filter medium part end and the second filter medium part end are respectively bonded by the bonding means in a state where they face each other. Thus, the two clamping members may each clamp the adhesive portion.

  According to the filter medium joining structure relating to the present invention, the filter element includes a substantially cylindrical tube, and a partition wall that is integrally formed with the tube by a manufacturing method such as injection molding, and divides the inner circumferential space of the tube in the axial direction of the tube. Therefore, the number of members is small, the structure is simplified, and it can be easily manufactured. Further, in addition to these members, since it has a clamping portion that can be integrally molded or easily manufactured, the bonded portions of the end portions of the respective filter media parts bonded by the adhesive can be reliably bonded.

  Hereinafter, a preferred embodiment of a filter medium bonding structure according to the present invention will be described with reference to FIGS. 1 to 5. The dual flow type filter using the filter element having the filter medium joining structure according to the present invention is used, for example, for filtering engine oil for automobiles. FIG. 1 shows a case where a dual flow filter 2 equipped with the filter element 1 is used for engine oil filtration. Fluid (engine oil) stored in an oil pan 90 is pumped by an oil pump 91. Then, it is introduced from the inflow hole 6 of the dual flow filter 2 into the outer peripheral space 63 formed in the gap between the filtration element 1 and the case 3. Of the fluid introduced into the outer peripheral space 63 of the filter element 1, the fluid that flows into the full flow element 31 and is filtered by the first filter medium 51 flows out from the first outflow hole 7 and flows into the bypass element 41. The material filtered by the second filter medium 52 flows out from the second outflow hole 8. The fluid flowing out from the first outflow hole 7 is supplied to each sliding portion of the engine 92, and the fluid flowing out from the second outflow hole 8 is returned to the oil pan 90 without being sent to the engine 92.

  An example of the dual flow filter 2 in which the filtration element 1 is attached to the element receiving seat 4 and accommodated in the case 3 is shown in FIG. This dual flow filter 2 includes an element receiving seat 4, a top-closed substantially cylindrical case 3 that is detachable by being screwed into the element receiving seat 4, and a case that is inserted into the element receiving seat 4 and then inserted into the case. The filter element 1 is accommodated in the filter 3.

  The element receiving seat 4 is provided with an inflow hole 6 that penetrates in the vertical direction and communicates with the outside of the dual flow filter 2 so that fluid flows into the filter element 1. Further, a first passage 5 a and a second passage 5 b that are circularly depressed in the vertical direction are provided on the upper surface of the element receiving seat 4. And the 1st outflow hole 7 penetrated to the up-down direction from the 1st channel | path 5a is similarly provided with the 2nd outflow hole 8 penetrated to the up-down direction from the 2nd channel | path 5b. These outflow holes 7 and 8 are both in communication with the outside of the dual flow type filter 2, and the fluid that has passed through the first filter medium 51 and the second filter medium 52 can flow out to the outside.

  On the outer peripheral side of the element receiving seat 4, an upright portion 9 is formed so as to rise upward, and a female screw portion 9 a is formed on the inner peripheral surface of the upright portion 9. On the other hand, a male screw portion 3 a is formed on the outer peripheral surface of the lower portion of the case 3, and a seal groove for attaching the O-ring 3 c along the outer peripheral surface of the case 3 that is slightly above the male screw portion 3 a. 3b is formed.

  In order to accommodate the filter element 1 in the case 3, the filter element 1 and the element receiving seat 4 are fitted together, and then the female screw portion 9 a formed in the element receiving seat 4 is formed in the case 3. The male screw portion 3a is screwed. At this time, the inner peripheral surface or seal groove 3b of the upright portion 9 and the O-ring 3c are in close contact with each other, so that fluid does not leak to the outside of the dual flow filter 2. Further, in this state, a lower space 64 is formed between the filtration element 1 and the element receiving seat 4 so that the fluid flowing in from the outside through the inflow hole 6 passes through the lower space 64. It has become.

  Hereinafter, the filtration element 1 will be described with reference to FIGS. 3 to 5. The filter element 1 is a cylindrical tube 11 having an inner circumferential space 60, and a filter medium portion that is arranged on the outer peripheral side of the tube 11 in the circumferential direction of the tube 11 and includes a first filter medium 51 and a second filter medium 52. And is formed in a hollow cylindrical body as a whole. Further, the tube 11 is formed with a lattice-like frame 12 and has a large number of fluid passages 13 penetrating the tube 11.

  A disc-shaped upper end plate 71 is attached to the upper end portion of the hollow cylindrical body. That is, the upper end plate 71 is supported by the tube 11, the first filter medium 51 and the second filter medium 52, and closes the upper portion of the tube 11 and the upper portions of the filter media 51 and 52. On the other hand, a lower end plate 81 is attached to the lower end portion of the hollow cylindrical body, supports the tube 11, the first filter medium 51, and the second filter medium 52, closes the lower portions of the respective filter media 51, 52, and lower end plates. A substantially central portion 81 is opened to form a fluid passage which will be described later.

  The inner peripheral space 60 formed on the inner peripheral side of the tube 11 is divided in the axial direction of the hollow cylindrical body by a partition wall W that is integrally molded with the tube 11 by, for example, injection molding and is curved in a circular arc shape in cross section. The space has two chambers having different volumes (referred to as “first inner circumferential space 61” and “second inner circumferential space 62”, respectively). Thus, the partition wall W formed integrally with the resin and integrated with the tube 11 is curved in a cross-sectional arc shape so that it is surrounded by the tube 11, the partition wall W (curved side), and the upper and lower plates 71 and 81. The first inner space 61 surrounded by the tube 11, the partition wall W (the side opposite to the curved side), and the upper and lower plates 71 and 81 has a larger volume than the second inner space 62. Yes. Further, both ends of the partition wall W divide the filter medium portion arranged on the outer peripheral side of the tube 11 into a first filter medium 51 and a second filter medium 52 in the axial direction of the hollow cylindrical body, respectively. In addition, it is preferable to use the synthetic resin which has heat resistance for the tube 11 including the part of the partition wall W. FIG.

  The first filter medium 51 is composed of a sheet-shaped filter medium such as a filter paper that is alternately bent and formed into a pleat fold (from a bellows-like fold), and is the outer peripheral side of the tube 11 and the first inner peripheral space 61. Is arranged in the circumferential direction of the tube 11 on the outer peripheral side of the tube 11. The second filter medium 52, which is shorter than the first filter medium 51 (the length of the ninety-nine fold portion is shorter than that of the first filter medium 51), is formed by folding the filter paper in the same manner as the first filter medium 51. The outer peripheral side of the tube 11 is arranged in the circumferential direction of the tube 11 on the outer peripheral side of the second inner peripheral space 62.

  Further, as shown in FIG. 4, both end portions of the partition wall W extend from the inner circumferential space 60 side to the filter media 51 and 52, and both have a shed-like clamping portion 24. And after making it adhere | attach with an adhesive agent in the state with which the edge parts of the 1st filter medium 51 and the 2nd filter medium 52 were made to oppose, all these clamping parts 24 are the said opposing part ( The adhesive part) is sandwiched. Thus, the clamping part 24 provided in the edge part of the partition wall W can make these closely_contact | adhere by clamping the edge part of the 1st filter medium 51 and the 2nd filter medium 52, and the 1st filter medium 51 and 1st A filter medium part in which the two filter mediums 52 are integrated is formed. In addition, it is preferable to use the thermosetting resin (for example, epoxy resin) which has heat resistance as an adhesive agent, and it is not restricted to the thing by an adhesive agent as an adhesive means, You may use welding.

  The structure around the sandwiching portion is not limited to the one described above. For example, as shown in FIG. 5, the end portions of the first filter medium 51 and the second filter medium 52 are opposed to each other with an adhesive. After being bonded to W (that is, via the partition wall W in between), the two hook-shaped clamping members 24 ′ made of a member different from the partition wall W are connected to the case 3. You may make it clamp from the side. In addition, the two shed-like clamping members 24 ′ formed of a member different from the partition wall W may be configured to clamp the adhesive portions of the filter media 51 and 52 from the tube 11 side (that is, In FIG. 4, the clamping part 24 does not need to be provided integrally with the partition wall W at both ends of the partition wall W). According to such a configuration, the clamping member 24 ′ clamps the end portions of the first filter medium 51 and the second filter medium 52 so that they can be brought into close contact with the partition wall W, and the first filter medium 51 and the second filter medium 52 can be brought into close contact with each other. A filter medium part in which the filter medium 52 is integrated with the end of the partition wall W is formed. In addition, it is preferable to use a synthetic resin having heat resistance like the partition wall W for the clamping member 24 ′.

  Thus, the filter element 1 has the first filter medium 51 and removes solid substances such as normal combustion products and metal powder, and captures and removes carbonaceous dirt and fine particles. And a bypass element 41 having a volume smaller than that of the full flow element 31.

  In this embodiment, the first filter medium 51 (full flow filter medium) is coarser than the second filter medium 52 (bypass flow filter medium). For this reason, the filtration resistance of the full flow element 31 through which a large amount of fluid passes can be reduced. Further, the first filter medium 51 is longer in the circumferential direction of the tube 11 than the second filter medium 52 and has a large filtration area, so that the filtration capacity can be enhanced. On the other hand, the second filter medium 52 has a finer mesh than the first filter medium 51 and has high filtration accuracy. Thus, by increasing the filtration accuracy of the second filter medium 52, when the fluid passes through the second filter medium 52, not only combustion products and metal powder but also fine particles can be removed. ing. Further, the pleats of the second filter medium 52 are arranged in a dense state as compared with that of the first filter medium 51 in order to increase the filtration area as a whole, and even if the volume on the bypass element 41 side is smaller than the full flow element 31 side. The filtration capacity can be increased.

  Further, the ends of the first filter medium 51 and the second filter medium 52 are brought into close contact with each other by the sandwiching section 24, so that the first filter medium 51 and the second filter medium 52 are integrated to form a cross-shaped chrysanthemum shape as a whole. Both ends of the tube 11 and the first filter medium 51 in the cylindrical axis direction are sandwiched by the upper end plate 71 and the lower end plate 81 each having a disk shape. Similarly, both ends of the tube 11 and the second filter medium 52 in the cylinder axis direction are sandwiched. The surface is sandwiched between the upper end plate 71 and the lower end plate 81.

  The first outflow port 82 and the second outflow port 83 projecting downward substantially at the center of the lower end plate 81 are the first passages provided in the element receiving seat 4 when the filter element 1 is attached to the element receiving seat 4. 5a and the 2nd channel | path 5b are each fitted. For this reason, in the state where the filter element 1 is fitted into the element receiving seat 4, the first outlet 82 communicates with the first outlet hole 7, and the second outlet 83 communicates with the second outlet hole 8. Seal grooves 82 a and 83 a for attaching O-rings 82 b and 83 b are provided on the outer peripheral surfaces of the first outlet 82 and the second outlet 83, respectively, and when the filter element 1 is mounted on the element receiving seat 4. The inner wall surfaces or seal grooves 82a and 83a of the first passage 5a and the second passage 5b and the O-rings 82b and 83b are in close contact with each other. For this reason, the fluid flowing out from the filtration element 1 side to the first passage 5a and the second passage 5b through the first outlet 82 or the second outlet 83, respectively, does not flow backward to the inlet hole 6 side. Yes.

  In the dual flow filter 2 configured as described above, when the fluid is introduced from the inflow hole 6 into the outer peripheral space 63 via the lower space 64, the fluid flows from the outer peripheral space 63 toward the tube 11 to the first filter medium 51. Alternatively, the solid matter contained in the fluid is captured and removed through the second filter medium 52. At this time, the fluid that has passed through the first filter medium 51 flows out from the hole 13 formed in the tube 11 into the first inner circumferential space 61. On the other hand, the fluid that has passed through the second filter medium 52 flows out from the hole 13 formed in the tube 11 into the second inner circumferential space 62. The fluid that has flowed into the first inner peripheral space 61 flows in the order of the first passage 5 a and the first outlet hole 7 through the first outlet 82, flows out to the outside, and flows into the second inner peripheral space 62. Flows in the order of the second passage 5b and the second outlet hole 8 through the second outlet 83 and flows out to the outside.

  As described above, the filter element according to the present invention is a partition wall in which the filter element is integrally formed with a substantially cylindrical tube and the tube by a manufacturing method such as injection molding, and divides the inner peripheral space of the tube in the axial direction of the tube. Therefore, the number of members is small, the structure is simplified, and it can be easily manufactured. Further, in addition to these members, since it has a clamping portion that can be integrally molded or easily manufactured, the bonded portions of the end portions of the respective filter media parts bonded by the adhesive can be reliably bonded.

  Further, as in the above-described embodiment, the full flow element having the first filter medium part having a coarse filter particle size by the partition wall curved in a substantially arc shape in cross section, and the second filter element having a finer filter particle diameter shorter than the first filter medium part. And a bypass element having a filter medium portion, and is structured in consideration of the flow rate balance of the fluid flowing through each filter. For this reason, even if the flow rate on the full flow element side is large, the filtration resistance can be lowered by a full flow element having a large filtration area and a coarse filtration particle size. The filter can efficiently filter, and the overall filtering ability (as a dual flow filter) can be increased.

It is a block diagram at the time of using the dual flow type filter which has the filter-medium junction structure which concerns on this invention for engine oil filtration. It is side sectional drawing which shows the attachment state of the said dual flow type filter. It is a sectional side view of the said filtration element. It is a plane sectional view in one form of the above-mentioned dual flow type filter. It is a plane sectional view in one form of the above-mentioned dual flow type filter. It is a sectional side view which illustrates the filtration element which consists of the conventional filter media joining structure. It is a perspective view which illustrates the filtration element which consists of the conventional filter media joining structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Filtration element 2 Dual flow type filter 11 Tube 24 Clamping part 24 'Clamping member 51 1st filter medium (1st filter medium part, filter medium for full flow)
52 2nd filter medium (second filter medium part, filter medium for bypass flow)
60 Inner space W Partition wall

Claims (3)

A substantially cylindrical tube, a filter medium disposed on the outer side of the tube in the circumferential direction of the tube, and a partition wall that divides the inner circumferential space of the tube in the axial direction of the tube. In a hollow tubular body filtration element,
Both ends of the partition wall extend from the inner peripheral space side to the filter medium side to divide the filter medium into a first filter medium part and a second filter medium part,
The first filter medium portion and the second filter medium are sandwiched and joined to the outer peripheral side of the tube with the end of the first filter medium portion and the end of the second filter medium portion facing each other. A filter medium joining structure comprising a sandwiching portion for integrating the portion.   The sandwiching portions are formed at both ends of the partition wall, and the end portions of the first filter medium portion and the end portions of the second filter media portion are bonded to each other by an adhesive means, and the sandwiching portions are The filter medium bonding structure according to claim 1, wherein the adhesive portion is sandwiched from the tube side.   The sandwiching part is composed of two sandwiching members, and the two sandwiching members are bonded to each other by an adhesive means in a state where the end of the first filter medium part and the end of the second filter medium part are opposed to each other. The filter medium joining structure according to claim 1, wherein each of the adhesive parts is sandwiched.

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