JP3007835U - Cartridge filter - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a cartridge filter which can maintain high filtration accuracy while increasing the filtration efficiency by increasing the filtration area and which can be carried out at a low cost with a simple structure. [Constitution] A long strip of filter paper (17) is wound into a roll,
A roll-shaped filter element (3) is formed, and the roll-shaped filter element (3) is covered with a filter case (4). Inner surface of filter case (4) and roll-shaped filter element (3)
A primary chamber (5) is formed between them and a secondary chamber (6) is formed inside the roll-shaped filter element (3). The outer peripheral surface (19) and both end surfaces (20, 21) of the roll-shaped filter element (3) are directly exposed to the primary chamber (5). Roll filter element
The fluid to be filtered is configured to be permeable from the outer peripheral surface (19) and both end surfaces (20, 21) of (3) toward the inner peripheral surface (18) of the roll-shaped filtration element (3).

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cartridge filter used for filtering, for example, lubricating oil of an internal combustion engine.

[0002]

[Prior art]

 Conventionally, as a cartridge filter of this type, there is one using, for example, a packing type filter element shown in FIG. That is, in this cartridge filter (50), the net-like outer cylinder (52) is arranged outside the cylindrical net-like support (51), and the cylinder is provided between the outer cylinder (52) and the support (51). The filter element is filled with a filter medium and both ends are closed with end caps (54, 55) to form a cylindrical filter element (53) .The cylindrical filter element (53) is covered with a filter case (56). A primary chamber (57) is formed between the inner surface of the filter case (56) and the cylindrical filtration element (53), and a secondary chamber (58) is formed inside the cylindrical filtration element (53). The foreign matter in the fluid is removed by flowing the fluid to be filtered from the primary chamber (57) into the secondary chamber (58).

[0003]

[Problems to be solved by the device]

 In the above cartridge filter, since the end caps (54, 55) are attached to both ends of the cylindrical filtration element, only the outer peripheral surface (59) faces the primary chamber (57), and the filtration area is small. It is difficult to increase the dust collection capacity.

In order to solve this, for example, as shown in FIG. 5, there is a pleated filter element (61) which is formed by corrugating the band-shaped filter paper (60) into a corrugated shape to form a tubular filter element. In the cartridge filter of the type using the pleated filter element (61), although the filtering area can be increased to increase the dust collecting capacity, the end caps (54, 55) that close the openings at both ends like the above-mentioned conventional technology. In addition to the above, the band-shaped filter paper (60) must be pleated into a complicated corrugated shape, and there is a problem that it cannot be carried out at a low cost. Moreover, in the cartridge filter of the type using the pleated filter element (61), the fluid to be filtered flows into the secondary chamber from the primary chamber only by passing through one strip of filter paper (60). It is difficult to improve filtration accuracy.

The present invention solves the above problems, and provides a cartridge filter that can maintain a high filtration accuracy while increasing the filtration area and dust collection capacity, and that can be implemented at a low cost with a simple structure. This is a technical issue.

[0006]

[Means for Solving the Problems]

 Means for achieving the above object will be described below with reference to FIGS. That is, according to the present invention, the cylindrical filter element is covered with the filter case (4) to form the primary chamber (5) between the inner surface of the filter case (4) and the cylindrical filter element. A secondary chamber (6) is formed inside the filter, and the fluid to be filtered is removed from the primary chamber (5) by passing through the cylindrical filtration element and into the secondary chamber (6). In the cartridge filter configured as described above, the long strip-shaped filter paper (17) is wound in a roll shape to form a roll-shaped filtration element (3), and the outer peripheral surface of the roll-shaped filtration element (3) ( 19) and both end faces (20, 21) of the roll-shaped filter element (3) along both edges of the band-shaped filter paper (17) are directly faced to the primary chamber (5), and the above-mentioned roll-shaped filter element (3) is From the outer peripheral surface (19) and both end surfaces (20, 21) of the roll-shaped filter element (3) It is characterized in that the permeable structured to be filtered fluid toward the peripheral surface (18).

[0007]

[Action]

 Since the outer peripheral surface of the roll-shaped filter element and both end surfaces along the side edges of the strip-shaped filter paper directly face the primary chamber, the fluid to be filtered in the primary chamber enters the outer peripheral surface and both end surfaces of the roll-shaped filter element. Then, it passes through the inner filter layer and flows into the secondary chamber on the inner peripheral surface side. At this time, the fluid to be filtered passes through the filtration layer formed by stacking long strips of filter paper in multiple layers, so that foreign matters such as dust in the fluid are accurately removed.

[0008]

【Example】

 1 and 2 show a first embodiment of the present invention. FIG. 1 is a vertical sectional front view of a cartridge filter disposed in a lubricating oil passage of a forced lubrication engine, and FIG. 2 is a perspective view of a roll-shaped filtration element. It is a figure.

In this cartridge filter (1), a cylindrical support (2) made of a cylindrical punching metal, a synthetic resin molded body, a perforated cardboard or the like is arranged at the center, and this support (2) is used as a core. A roll-shaped filter element (3) is formed, the outside of which is covered with a filter case (4), and a primary chamber (5) is formed between the roll-shaped filter element (3) and the inner surface of the filter case (4). In addition, a secondary chamber (6) is formed inside the roll-shaped filter element (3), that is, inside the support (2).

A pressing spring (23) is arranged on the upper shoulder of the support (2), and a filter case (4) is arranged on the upper surface of the support (2). The plate (7) is tightly pressed. The outer peripheral portion of the mounting metal plate (7) is oil-tightly fixed to the inner surface of the opening end (8) of the filter case (4) to hold the roll-shaped filtration element (3) inside the filter case (4). It is configured as follows. On the other hand, a connecting pipe (9) is screwed and fixed to the center of the mounting metal plate (7) in an oil-tight state, and the cartridge filter (1) is connected to the engine lubricating oil through the connecting pipe (9). It is fixed to the filter mounting part (11) provided in the passage (10).

An inlet oil passage (12) and an outlet oil passage (13) are provided in the filter mounting portion (11), and the primary chamber (5) is lubricated to the engine through the inlet oil passage (12). An oil pump (14) is communicatively connected, and the secondary chamber (6) is communicatively connected to each lubricating portion of the engine through an outlet oil passage (13). Reference numeral (15) is a drain back prevention valve, and (16) is a relief valve for securing a flow rate of oil when the oil viscosity is high or when the filtration element is clogged.

As shown in FIG. 2, the roll-shaped filter element (3) is formed by winding a long band-shaped filter paper (17) in a roll shape, and the inner and outer peripheral surfaces (18, 19) and the upper and lower end surfaces (20, 21) along both side edges of the band-shaped filter paper (17) are exposed, respectively, and are tightly wound around the support body (2) as shown in FIG. . Therefore, in this roll-shaped filter element (3), the outer peripheral surface (19) and the upper and lower end surfaces (20, 21) are directly exposed to the primary chamber (5), respectively, while the inner peripheral surface (18) is It faces the secondary chamber (6) through the support (2).

Next, the filtration of the lubricating oil by the cartridge filter of the present invention will be described. Lubricating oil forcibly delivered from the engine lubricating oil pump (14) passes through the inlet oil passage (12) to the primary chamber (5) through the openings (22) provided in the mounting metal plate (7). Inflow.

The filtered lubricating oil that has flowed into the primary chamber (5) flows from the outer peripheral surface (19) of the roll-shaped filtration element (3) and the upper and lower end surfaces (20, 21) of the roll-shaped filtration element (3). Into the secondary chamber (6) on the inner peripheral surface (18) side through the inner filter layer. At this time, since the lubricating oil passes through the filter layer formed by winding the long strip-shaped filter paper (17) in multiple layers, foreign matters such as dust in the fluid are removed with high accuracy.

The filtered lubricating oil that has flowed into the secondary chamber (6) passes through the connecting pipe (9) and is sent out from the outlet oil passage (13) to each lubricating portion of the engine.

FIG. 3 is a vertical sectional front view of a main part of the cartridge filter showing another embodiment of the present invention. In this embodiment, the support body (2) is omitted, and the inner peripheral edge of the roll-shaped filter element (3) is provided with a disc-shaped holding spring (23A) and an inner periphery of the mounting metal plate (7). The roll-shaped filter element (3) is fixed in the filter case (4) by sandwiching the top and bottom with the short tube-shaped receiving metal fitting (24) fitted on the mounting ring (7A) protruding from the edge. This is what I did.

In each of the above embodiments, the case where the cartridge filter is arranged in the lubricating oil passage of the forced circulation engine has been described, but the cartridge filter of the present invention is not limited to the application to the filtering of the lubricating oil, and other liquids. It goes without saying that it can also be applied to gas filtration. For example, it may be arranged in the intake passage of the engine and used as an air filter.

[0018]

[Effect of device]

 The present invention has the following effects because it is configured and operates as described above.

(A) Since the fluid to be filtered passes through the filtration layer inside the roll-shaped filtration element formed by winding the strip-shaped filter paper in multiple layers, it is possible to remove foreign matters in the fluid to be filtered with high accuracy, The filtration accuracy can be maintained high.

(B) Since not only the outer peripheral surface of the cylindrical filter element but also both end surfaces along the side edge of the band-shaped filter paper are directly exposed to the primary chamber, all of the paper surface and the side edge of the band-shaped filter paper are regarded as the filtration area. Can be effectively used and the dust collection capacity can be increased.

(C) The ends of the cylindrical filter medium do not require members such as end caps as in the prior art. Moreover, since it is not necessary to pleat the band-shaped filter paper into a complicated corrugated shape, and the filter element is formed with a simple structure of simply winding the long-axis band-shaped filter paper into a cylindrical shape, it can be implemented at an extremely low cost. it can.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of a cartridge filter when the cartridge filter is arranged in a lubricating oil passage of a forced lubrication type engine, showing an embodiment of the present invention.

FIG. 2 is a perspective view of a roll-shaped filter element.

FIG. 3 is a longitudinal sectional view of a main part of the cartridge filter, showing another embodiment of the present invention.

FIG. 4 is a view corresponding to FIG. 1 of a cartridge filter using a filling type filtration element, showing the prior art.

FIG. 5 is a perspective view of a pleated filtration element showing the prior art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Cartridge filter, 2 ... Support body, 3 ... Roll-shaped filtration element, 4 ... Filter case, 5 ... Primary chamber, 6 ... Secondary chamber, 17 ... Strip filter paper, 18 ... Inner peripheral surface of roll-shaped filtration element, 19 ... Outer peripheral surface of roll-shaped filtration element, 20 ... End surface (upper end surface) of roll-shaped filtration element, 21 ... End surface (lower end surface) of roll-shaped filtration element.

Claims (1)

[Scope of utility model registration request] 1. A cylindrical filter element is covered with a filter case (4) to form a primary chamber (5) between the inner surface of the filter case (4) and the cylindrical filter element, and
A secondary chamber (6) is formed inside the cylindrical filtration element, and the fluid to be filtered is passed from the primary chamber (5) through the cylindrical filtration element to flow into the secondary chamber (6). In a cartridge filter configured to remove foreign matter, a long band-shaped filter paper (17) is wound into a roll to form a roll-shaped filtration element (3), and an outer peripheral surface of the roll-shaped filtration element (3) is formed. (19) and both end faces (20, 21) of the roll-shaped filter element (3) along both edges of the band-shaped filter paper (17) directly face the primary chamber (5), and the roll-shaped filter element (3) The outer peripheral surface (19) and both end surfaces (20.2
It is characterized in that the fluid to be filtered can be transmitted from 1) toward the inner peripheral surface (18) of the roll-shaped filtration element (3).
Cartridge filter.