JPH0331377Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an oil strainer, and in particular, to an oil strainer that can remove minute floating dust contained in oil.

[Conventional technology]

Generally, in the case of an oil strainer used in an engine torque converter, as shown in FIG.
A screen 24 made of wire netting made of brass, stainless steel, etc. is disposed between 1 and 22 to divide the inside of the casing 23 into two chambers. The oil stored in the reservoir flows in and passes through the wire mesh screen 24, and during this passage, floating dust such as abrasion powder and metal powder contained in the oil is removed. The oil flows out through an outflow hole 21a provided in the upper casing 21 and is supplied to downstream equipment.

[Problem that the invention attempts to solve]

However, in the case of the oil strainer configured as described above, since the screen made of wire mesh is used to remove floating dust contained inside the oil, the size of the mesh must be kept below a predetermined size. Therefore, the screen is useless for floating dust that is smaller than this mesh and will pass through, resulting in minute floating dust inside the oil. However, there was a problem in that the valves etc. would lock up and become inoperable.

This invention solves the problems of the conventional ones as mentioned above, and can also remove floating dust in the oil, thereby preventing the occurrence of locks in the valves. The purpose is to provide an oil strainer that can.

[Means for solving problems]

In order to solve the above problems, this invention has a screen holding member arranged inside a casing consisting of an upper and lower casing made of resin containing magnetic powder to divide it into two upper and lower chambers, and an outflow hole in the upper casing. Further, each of the lower casings is provided with an inflow hole, and the screen holding member is provided with a screen holding portion and a valve seat portion that cooperates with either one of the upper and lower casings to form a valve, and further, A screen is disposed inside the screen holding portion of the screen holding member to close off the two chambers.

[Effect]

By adopting the above-mentioned means, this idea
It is possible to reliably remove minute floating dust inside the oil and supply oil with these removed, thereby reliably preventing valves from locking due to minute dust. In addition, iron-based sludge, wear particles, etc. are adsorbed to the magnetic wall of the lower casing before reaching the screen, and extremely small iron-based floating dust that has passed through the screen is absorbed by the lower casing. Since the oil is attracted to the magnetic wall of the upper casing, oil from which iron-based sludge and floating dust have been removed is supplied to the equipment.

〔Example〕

Embodiments of this invention shown in the drawings will be described below.

Fig. 1 shows an oil strainer according to this invention, which consists of an upper casing 1 made of resin containing magnetic powder and a lower casing 2 made of resin combined with the upper casing 1. A casing 3 is constructed, and a screen holding member 4 is sandwiched and supported between the upper and lower casings 1 and 2.

This screen holding member 4 has a screen holding part 5 that holds a screen 7, which will be described later, and a valve seat part 6 that cooperates with the upper casing 1 to form a valve 13. The screen 7 held by the member 4 is made of filter paper or nonwoven fabric, unlike conventional ones made of wire mesh, and this screen 7 is bent into a bellows shape and is stored in the screen holding part 5 of the screen holding member 4. has been done.

In addition, when forming the screen 7, if it is a filter paper, use a mixture of linter pulp, polyester, etc. fibers, papermaking to a certain thickness, and binding with a phenolic or acrylic binder. However, in the case of non-woven fabric, one made of synthetic fibers such as polyamide and polyester is used.

On the other hand, the valve seat portion 6 of the screen holding member 4
is a wire mesh screen 1 to block it.
Further, a spring 11 is provided in a portion of the upper casing 1 facing the upper end portion, and a valve body 12 is provided which is biased against the valve seat portion 6 by this spring 11. The valve 13 is composed of the following.

In the oil strainer configured as described above, as in the conventional one, piping is provided to the outflow hole 1a provided in the upper casing 1, and suction is carried out by a pump (not shown). Then, the oil stored inside the oil pan flows through the inflow hole 2a provided in the lower casing 2, and before this oil reaches the screen 7, it passes through the magnetic lower casing 2. The iron-based sludge contained in the oil is then adsorbed and removed, and the oil from which the iron-based sludge has been removed reaches the screen 7.

After the iron-based sludge is removed, the floating dust contained in the oil is removed by the screen 7, and since the screen 7 is made of filter paper or non-woven fabric, it can Unlike the screen, the mesh is very fine and can remove minute floating dust, and like the lower casing 2, the minuscule iron-based floating dust that has passed through the screen 7 contains magnetic powder. It will be adsorbed and removed by the wall surface of the upper casing 1.

In the above case, the screen 7 is made of only filter paper or non-woven fabric, but when considering the bellows-shaped portions, they are pressed by oil from both sides and come into contact with each other during suction by the pump. If this prevents oil from passing through the contact area, thereby reducing the amount of oil passing through and potentially causing insufficient oil to be supplied by the pump, the screen A filter member 8 made of filter paper or non-woven fabric and a supporting member 9 made of a wire mesh for preventing the filter members 8 from coming into close contact with each other are superposed on each other, and the filter member 8 is placed opposite to the surface on which pressure is applied. The screen holding member 4 may be housed in the screen holding portion 5 of the screen holding member 4 with the supporting member 9 located on the side thereof.

As a result, when the pump is not in operation, the screen 7 is in the state shown in FIG. 2, but when the pump is in operation, pressure is applied and the screen 7 is in the state shown in FIG. supporting member 9
This eliminates the possibility that the peaks of the filter member 8 will come into contact with each other.

In addition, since the screen 7 has a bellows shape, it is possible to increase the area through which oil passes, so although the amount of oil passing through per unit is smaller than that of a screen made of wire mesh, the overall It is possible to obtain the same amount of outflow as when using a wire mesh screen.

Furthermore, if the amount of oil passing through the screen 7 decreases and too much oil accumulates in the chamber before passing through the screen 7, the valve 13 is activated by the pressure acting at this time. Spring 1
The valve body 12 is raised against the biasing force of the upper casing 1, whereby the oil flows out from the outflow hole 1a of the upper casing 1 through the wire mesh screen 10, thereby causing an oil shortage situation. It prevents you from doing so.

[Effect of idea]

By configuring this idea as described above,
The filtration accuracy has been significantly improved, making it possible to remove minute floating dust located inside the oil, and supplying the oil from which they have been removed to equipment. It is possible to reliably prevent situations such as locking due to dust from occurring, and in addition, the iron-based sludge can be adsorbed and removed by the magnetic lower casing before it reaches the screen, so the screen itself In addition, the extremely small iron-based floating dust that has passed through the screen can be removed by adsorption to the magnetic upper casing wall. Even if the valve is activated, oil is supplied through the screen provided on the valve, which has excellent effects such as being able to reliably prevent a shortage of oil being supplied to the equipment. It is something.

[Brief explanation of drawings]

Fig. 1 is a schematic sectional view showing an oil strainer according to this invention, Figs. 2 and 3 are schematic views showing the states before and after pressure is applied to a screen that can be used in this invention, and Fig. 4 is a schematic sectional view showing an oil strainer according to this invention. It is a partially cutaway schematic perspective view showing a conventional oil strainer. 1, 21... Upper casing, 1a, 21a...
Outflow hole, 2, 22...Lower casing, 2a, 22
a... Inflow hole, 3, 23... Casing, 4...
Screen holding member, 5... Screen holding part,
6...Valve seat portion, 7...Screen, 8...Filtering member, 9...Supporting member, 10, 24...Wire mesh screen, 11...Spring, 12...Valve body, 13...
…valve.

Claims (1)

[Claims for Utility Model Registration] (1) A screen holding member 4 is arranged inside a casing 3 consisting of upper and lower casings 1 and 2 made of resin containing magnetic powder to divide it into two upper and lower chambers, and the upper casing 1 is provided with an outflow hole 1a, and the lower casing 2 is provided with an inflow hole 2a,
The screen holding member 4 is provided with a screen holding portion 5 and a valve seat portion 6 that constitutes the valve 13 by cooperating with either one of the upper and lower casings 1 and 2, and further, the screen holding member 4 is provided with An oil strainer characterized in that a screen 7 is disposed inside the holding part 5 to close off the space between the two chambers. (2) The screen 7 disposed inside the screen holding part 5 of the screen holding member 4 is
The oil strainer according to claim 1, which is made of filter paper or nonwoven fabric and has a bellows shape. (3) The screen 7 disposed inside the screen holding part 5 of the screen holding member 4 is
The oil strainer according to claim 1, wherein a filter member 8 made of filter paper or nonwoven fabric and a mesh support member 9 are polymerized and formed into a bellows shape.