JPH076374B2 - Oil filter - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an oil filter, and more particularly to an oil filter capable of removing solid foreign matter and gaseous foreign matter in oil.

《Prior Art》 Conventionally, in a prime mover for a vehicle in which oil, for example, lubricating oil is circulated, industrial machine tools including many hydraulic equipment, construction machines, transport machines, etc., solid foreign matter and gas in the lubricating oil are included. Removal of foreign matter has been done in a separate device or location,
There has been a demand for a device that efficiently satisfies both functions and can be used in a small space.

Therefore, Japanese Patent Application No. 63-202682 (Japanese Patent Laid-Open No. 2-52013) proposes an integrated separation / removal device capable of separating solid foreign matter and gaseous foreign matter in a liquid. This integrated separation / removal device uses a swirling flow chamber that causes a swirl flow in a liquid containing gaseous foreign matter after separating and removing the solid foreign matter by filtering the liquid containing the solid foreign matter and / or gaseous foreign matter that is being rolled up. A liquid containing a large amount of gaseous foreign matters gathering in the central portion of the swirling flow while allowing the liquid from which the gaseous foreign matters gathering at the outer edge of the swirling flow to flow out through a small hole provided in the wall of the swirling flow chamber due to the difference in specific gravity. Is introduced to the outside of the apparatus through a conducting tube or a conducting hole so that solid foreign matter and gaseous foreign matter in the liquid can be continuously separated and removed.

<< Problems to be Solved by the Invention >> However, in the device proposed in the above patent application, a conduit pipe for leading out a liquid containing a large amount of gaseous foreign matter gathering in the center of the swirl flow to the outside extends above the device. Since the filter element is arranged as described above, a pressure control valve, which is a safety measure when the filter element for filtering solid foreign matter is clogged, must be provided in the peripheral portion of the filter element. Therefore, a sufficient space for the liquid to flow into the pressure control valve cannot be secured, and the pressure control valve may not operate effectively.

In addition, a special sealing means must be provided between the conduit tube and the ceiling portion of the housing, resulting in a complicated structure.

Therefore, an object of the present invention is to provide an oil filter having a relatively simple structure and capable of efficiently disposing each component.

<< Means for Solving the Problem >> An oil filter according to the present invention is provided with a housing having a circular cross section and a predetermined height, and provided inside the housing.
A cylindrical filter element for separating solid foreign matter from oil, a swirl chamber provided in the internal space of this cylindrical filter element for separating gaseous foreign matter from oil, and collected in the central part of this swirl chamber. A lead-out pipe for leading out the oil containing a large amount of the gaseous foreign matter to the outside of the filter,
And a lead-out passage for leading out the oil collected outside the swirl chamber to the outside of the filter, wherein the lead-out pipe extends inside the lead-out passage and extends outside the filter. It is what

In this case, the outlet pipe may be provided with a pressure adjusting valve that opens and closes with the pressure of the oil containing a large amount of the gaseous foreign matter, or a flow rate adjusting means such as an orifice.

<< Operation >> In the oil filter of the present invention, as described above,
Outlet for outflowing the oil collected outside the center of the swirl chamber to the outside of the filter Outlet for outflowing the oil containing a large amount of foreign matter collected in the center of the swirl chamber to the filter Since the pipe extends to the outside of the filter, it is not necessary to consider a seal between the outlet pipe and the housing as in the conventional case, and a space is created in the upper center part of the housing, where the pressure control valve described above is provided. Since the pressure control valve can be provided, it is possible to arrange the pressure control valve in the central portion of the device to secure a sufficient oil inflow space, and to effectively operate the pressure control valve.

Further, since the oil outlet passage is arranged as described above, it is possible to remove gas foreign matter without significantly changing the structure of the oil filter that has been conventionally used, and also to configure the oil filter. The installation and piping can be done almost as is.

<< Examples >> Hereinafter, an oil filter according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a partially cutaway front view of an oil filter according to an embodiment of the present invention.

In this figure, reference numeral 1 is a housing having a circular horizontal sectional shape and having a predetermined height. A substantially annular bottom member 2 is fixed to the bottom of the housing 1. In the inner space of the housing 1, a cylindrical filter element 5 to which annular end plates 3 and 4 arranged at intervals in the vertical direction are fixed is arranged.

A cyclone device 6 is mounted on the lower end plate 4. The cyclone device 6 is arranged so as to be housed in the internal space of the filter element 5, and its height is set to be slightly lower than that of the filter element 5.

This cyclone device 6, a cylindrical outer wall 7 whose lower end is fixed to the end plate 4 and whose upper end is open, and a swirling flow in which an inverted conical portion 8 is inserted into this cylindrical outer wall 7 and whose upper end is fixed and closed It has a wall body 9 for forming a chamber and a lead-out pipe 10 having an open lower end having an intermediate portion fixed to the inverted conical portion 8, and the inside of the inverted conical portion 8 serves as a swirling flow chamber 11. There is.

A plurality of oil introduction openings 12 are provided around the upper portion of the cylindrical outer wall 7 of the wall body 9, and the oil introduced into the swirl flow chamber 11 through the openings 12 is provided at the periphery of each of the openings 12. A swirl vane 13 is provided to generate a swirl flow.

The swirl vanes 13 are not always necessary to cause the oil introduced into the swirl chamber 11 to swirl, and for example, the opening 12 may be provided so as to penetrate in the tangential direction of the swirl chamber 11. Good.

A large number of through holes 14 are formed in the inverted conical portion 8, and through holes 15 are also formed in a portion of the outlet pipe 10 located inside the swirling flow chamber 11.

The oil introduced into the cyclone device 6 is a swirl chamber.
At 11, the oil becomes a swirl flow, and due to the difference in specific gravity, the oil containing a large amount of gas foreign matter gathers in the center of the swirl flow, while the oil containing almost no gas foreign matter gathers outside and separates.

At this time, the oil containing almost no gas foreign matter collected on the outside of the swirling flow chamber 11 passes through the through hole 14 and is provided in the space between the inverted conical portion 8 of the cyclone device 6 and the cylindrical outer wall 7. Guided to R. On the other hand, the oil containing a large amount of gaseous foreign matter that collects in the central portion of the swirling flow chamber 11 flows into the outlet pipe 10 through the through hole 15.

A lead-out opening 16 for leading the purified oil out of the apparatus is formed at the center of the bottom member 2. The lead-out opening 16 is provided with a male screw portion 16a. On the bottom member 2, an introduction opening 17 for introducing oil to be purified into the apparatus is formed outside the extraction opening 16. The male screw portion 16a of the lead-out opening 16 has a hollow cylindrical body 1
The mounting block 18 is adapted to be coupled via 8a.

In the mounting block 18, an introduction passage 19 communicating with the introduction opening 17, and a first lead-out passage 20 communicating with the lead-out pipe 10,
And a second outlet passage 21 communicating with the outlet opening 16 is provided.

The outlet pipe 10 extends in the second outlet passage 21 partway.

A check valve 22 is provided on the introduction opening 17 of the bottom member 2 to prevent oil from flowing backward from the inside of the apparatus to the introduction passage 19.

The filter element 5 is provided above the space inside the filter element 5, that is, above the cyclone device 6.
A pressure control valve 23 is provided as a safety measure in the case of clogging. The pressure control valve 23 is opened when the filter element 5 is clogged and the pressure on the outside of the filter element 5 increases, so that the oil is supplied by bypassing the filter element 5.

A seal member is provided between the bottom member 2 and the mounting block 18 to seal between them.

In the oil filter configured as described above, when the oil is pumped by the pump P, the oil is introduced into the filter through the check valve 22 and flows through the filter element 5 from the outside to the inside to be filtered and solidified. Foreign matter is removed. In this way, the oil from which the solid foreign matter has been removed flows through the space inside the filter element 5 and is then introduced into the cyclone device 6 through the opening 12. When passing through the opening 12, the oil is made into a swirl flow by the swirl vanes 13 and is further made into a rapid swirl flow in the swirl flow chamber 11. Due to the centrifugal force generated by the swirling, the oil containing a large amount of solid foreign matter is collected in the central portion of the swirling flow and the oil containing almost no solid foreign matter is collected on the outer peripheral side based on the difference in specific gravity, and separated.

The oil containing a large amount of solid foreign matter collected in the central portion of the swirling flow flows into the outlet pipe 10 through the through hole 15, passes through the first outlet passage 20, and passes through the first outlet passage 20, for example, an oil pan (not shown) outside the filter. ) Sent to. On the other hand, the oil collected outside in the swirl chamber 11 and containing almost no solid foreign matter is
It is guided to the inside of the space R through 14 and is sent to the outside of the filter, for example, to the lubricating portion via the second outlet passage 21.

The outlet pipe 10 may be provided with a pressure adjusting valve 30, for example, as shown by reference numeral 30 in the figure. If this valve is installed, the pressure of oil containing a large amount of solid foreign matter in the outlet pipe 10 may be increased. When the pressure exceeds a certain pressure, the pressure regulating valve 30 opens, and the oil containing a large amount of solid foreign matter is intermittently returned from the first outlet passage 20 to the oil pan.

In this case, an orifice may be used instead of the pressure adjusting valve 30.

<< Effects of the Invention >> According to the above oil filter, solid foreign matter and gaseous foreign matter can be efficiently filtered and removed from the oil as described above. Further, the two outlet passages for leading out the oil separated in the swirl chamber to the outside of the filter are made to extend from the filter bottom portion, so that one passage can be arranged in the other passage, and In addition to facilitating the sealing with the housing etc., it becomes possible to install the pressure regulating valve in the center of the device. Further, the gas removal function can be added with almost no change to the existing configuration.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view of an oil filter according to an embodiment of the present invention. 1 ... Housing 5 ... Filter element 9 ... Swirling flow chamber forming wall 10 ... Outlet pipe, 11 ... Swirling flow chamber 14 ... Through hole, 20 ... First outlet passage 21 ... Second outlet Passage 30 ... Pressure control valve

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Reference number within the agency FI Technical indication location F01M 11/03 J 7604-3G (72) Inventor Ryuji Kuwahara 304 Shimoda-cho, Kohoku-ku, Yokohama-shi, Kanagawa ( 56) Bibliographic references Sho 55-177802 (JP, U) Japanese Patent Publication 4-50845 (JP, B2)

Claims (2)

[Claims] 1. A housing having a circular cross section and a predetermined height, a cylindrical filter element provided inside the housing for separating solid foreign matter from oil, and an internal space of the cylindrical filter element, A swirl flow chamber for separating gas foreign matter from the oil, a discharge pipe for discharging the oil containing a large amount of gas foreign matter collected in the central portion of the swirl flow chamber to the outside of the filter, and an inside of the swirl flow chamber An oil filter, comprising: a lead-out passage for leading out the oil collected to the outside to the outside of the filter, wherein the lead-out pipe extends inside the lead-out passage and extends outside the filter. 2. The oil filter according to claim 1, wherein the outlet pipe has a flow rate adjusting means.