JPS6122660Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a filter for keeping lubricating oil and the like clean.

[Prior art]

In general, fluids such as lubricating oils are contaminated with impurities as they are used, and these impurities can cause problems with equipment. For example, in an internal combustion engine, metal debris due to wear of moving parts such as sludge and bearing metal, or dirt, sand, etc. from the outside may enter the engine, causing damage or seizure. Moreover, not only does replacing the oil cause problems such as disposal of waste oil, but frequent replacement also wastes valuable petroleum resources. For this reason, filters are used to filter impurities in the lubricating oil using a filter element formed from a wire mesh or the like to keep the lubricating oil clean.

By the way, the filter element of the filter filters out impurities that cannot pass through the wire mesh as described above, so naturally it becomes clogged with impurities and needs to be cleaned periodically. Therefore, in conventional filters, an air source and its control system are connected to the filter, and the filter elements are cleaned by backwashing using air.

However, conventional filters of this type have a problem in that air used to clean the filter element gets mixed into the lubricating oil, causing deterioration of the quality of the lubricating oil. On the other hand, from a usage standpoint, it is naturally required to simplify the cleaning work of the filter element.

[Summary of the idea]

The present invention was developed in view of the above circumstances, and includes a tube body that communicates with the outside of the body at one end in a filter cage that is rotatably supported within the body. The opening edge is brought into sliding contact with the inner peripheral surface of the filter basket, and blades are provided on the inner peripheral surface that are inclined with respect to the inlet of the body, and the filter basket is rotationally driven by the force exerted by the fluid on the blades. This extremely simple configuration eliminates problems such as deterioration of the oil due to filter element cleaning.
To provide a filter that can easily, reliably and efficiently remove impurities from a filter element, and can simplify work. Hereinafter, its configuration and the like will be explained in detail with reference to embodiments shown in the drawings.

〔Example〕

Fig. 1 is a longitudinal cross-sectional view showing a filter according to the present invention, and Fig. 2 is a cross-sectional view thereof. In these figures, the reference numeral 1 indicates an inlet 2 through which lubricating oil as a fluid flows into the bottom portion 1a. It shows a cylindrical body with a bottom. The inlet 2 is opened facing the inside of the filter basket 3, and the outlet 4 through which the lubricating oil flows out is opened in the side of the body 1, facing the outer peripheral surface of the filter basket 3. That is, this filter is configured to introduce fluid into the filter basket 3 and allow it to flow out of the filter basket 3. The filter basket 3 is composed of an outer cylinder 5 formed in a cylindrical shape, an inner cylinder 6 loaded into the outer cylinder 5, and the like, and both of these members have a large number of through holes 7, 7, . . .
As shown in the enlarged view in FIG.
A filter element 8 made of is sandwiched therebetween. Arms 9, 9 are provided on the inner circumferential edge of the upper end portion to protrude radially inward, and the filter basket 3 is attached to the body 1 in the center portion.
A boss 10 is formed inside the body 1 at a position eccentric from the axis of the body 1 to be rotatably supported.

11 is a lid body that closes the upper opening of the body 1;
This lid 11 is fixed to the body 1 by stud bolts 12 and nuts 13 screwed onto the body 1. A support shaft 14 that passes through the boss 10 and supports it is fixed to this lid body 11 with nuts 16, 16 through a collar 15, and a filter basket 3 is disposed within the boss 10 between the support shaft 14 and the support shaft 14. A bearing (not shown) is installed internally to reduce the rotational driving force.
The tip of the support shaft 14 is connected to the top of the tubular body 17, and the height of the filter basket 3 is adjusted to create a frictional force (torque) between the lower end surface of the filter basket 3 and the inner bottom surface of the body 1. An adjustment nut 18 is threaded to prevent this from occurring.

The tube body 17 has a bent lower part to form a substantially crank shape, the upper straight part is in close proximity to the inner circumferential surface of the filter basket 3, and the lower part projects into the inlet 2. , are arranged inside the filter basket 3.
The lower end of this tubular body 17 is connected to a discharge pipe 20 outside the body 1 via a communication passage 19 that communicates between the inside and outside of the body. As shown in an enlarged view in FIG. 4, the circumferential wall of the tube body 17 is provided with an opening 21 extending in the axial direction corresponding to the filter element 8 in a portion close to the inner circumferential surface of the filter basket 3. There is. This opening 21
A guide member 22 is protruded from the edge of the opening and slides on the inner circumferential surface of the filter basket 3 to guide the lubricating oil that has passed through the filter element 8 to the opening 21 . 23 is a pair of sealing metals for preventing the lubricating oil in the filter basket 3 from directly flowing into the opening 21; It is formed to have a curvature equal to this. 24 is the sealing metal 23
This is a support part that supports the pipe body 17, and is provided protrudingly on both sides of the tube body 17. This support part 24 is a sealing metal 23
It has a recessed part 24a into which the protruding part 23b fits,
A support pin 26 is screwed into the sealing metal 23 so as to freely pass through the support hole 25 and support the support pin 26 movably on the inner circumferential surface of the filter basket 3. A spring 27 is elastically mounted between the sealing metal 23 and the support portion 24 and urges the sealing metal 23 toward the inner circumferential surface of the filter basket 3.

Reference numeral 28 denotes a plate-shaped blade provided on the inner circumferential surface of the lower part of the filter basket 3, and the blade 28 is designed to obtain the necessary power from the lubricating oil flowing into the filter basket 3 from the inlet port 2 of the body 1. It is inclined with respect to the inlet 2.

In the filter configured in this way, the fluid such as lubricating oil flowing into the body 1 from the lower inflow port 2 is filtered to remove impurities such as sludge when it passes through the filter element 8, and is then purified. It flows out from the outlet 4. At this time, impurities such as the sludge will adhere to the inner circumferential surface of the filter element 8, but the pressure of the lubricating oil flowing into the body 1 will be used to
can be cleaned. That is, one end of the pipe body 17 disposed inside the filter basket 3 is communicated with the atmosphere through the discharge pipe 20, and the lubricating oil inside the body 1 is released due to the pressure difference, which is about 2 kg/cm ² in the embodiment. This is because it can flow into the tube body 17 through the opening 21. Further, since the opening edge of the opening 21 is in sliding contact with the inner peripheral surface of the filter basket 3 by the guide member 22, the lubricating oil inside the filter basket 3 is prevented from flowing into the opening 21, and the outside of the filter basket 3 is prevented from flowing into the opening 21. This is because only the lubricating oil can pass through the filter element 8 and flow into the pipe body 17 from the opening 21. The effect of preventing the lubricating oil inside the filter basket 3 from flowing into the pipe body 17 is more effectively achieved by the sealing metal 23 which is elastically pressed against the inner circumferential surface of the filter basket 3 as described above. It is being said.

Therefore, the pressure difference causes the lubricating oil on the outside of the filter cage 3 to flow back into the filter cage 3, thereby making it possible to backwash impurities adhering to the inside of the filter element 8 corresponding to the opening 21. Furthermore, since the lubricating oil flowing into the filter basket 3 from the inlet 2 is guided in a direction oblique to the inflow direction along the blades 28, a force is exerted on the blades 28 due to the change in momentum, and the lubricating oil flows into the filter basket 3. The basket 3 can be driven to rotate. and filter element 8
corresponds continuously to the opening 21 over the entire circumferential surface,
Can be cleaned automatically.

Note that the amount of oil used for backwashing can be changed as appropriate depending on the area of the opening 21.

[Effect of idea]

As explained above, according to the present invention, a tube communicating with the outside of the body is provided in a rotatable filter cage, and the opening edge of the opening in the axial direction of the tube is slid on the inner circumferential surface of the filter cage. Because they are in contact with each other, the lubricating oil on the outside of the filter cage can flow back inside, and since there are wings on the inner peripheral surface of the filter cage, the lubricating oil acts on these wings to rotate the filter cage, and the filter element The entire circumferential surface of the opening can correspond continuously to the opening.

Therefore, since the filter element can be cleaned by the backflow of lubricating oil, there is no possibility of air being mixed in as in the conventional case, and it is possible to prevent the lubricant from deteriorating in quality. Moreover, since the filter basket is automatically rotated using oil and cleaning can be performed continuously, cleaning work can be simplified. This makes it possible to maintain the filter element in good condition for a long period of time, and since there is no need for a drive device or power source to rotate the filter cage, there is no need for piping or wiring associated with these, making it relatively It also has the advantage of being cheap to implement.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view showing a filter according to the present invention, Fig. 2 is a cross-sectional view thereof, Fig. 3 is a longitudinal cross-sectional view showing an enlarged filter element, and Fig. 4 shows the main parts of Fig. 2. FIG. 3 is an enlarged cross-sectional view. 1...Body, 2...Inlet, 3...Filter, 8
...Filter element, 10...Boss, 14...
...Bearing shaft, 17...Pipe body, 20...Discharge pipe, 21
... opening, 22 ... guide member, 28 ... wing.

Claims (1)

[Scope of utility model registration request] In a filter that introduces fluid into a cylindrical filter cage having a filter element on the peripheral wall and flows out of the filter cage, one end is connected to a discharge pipe outside the body within the filter cage rotatably supported within the body. A pipe body is provided, and an opening edge of an opening formed in the peripheral wall of the pipe body in the axial direction corresponding to the filter element is brought into sliding contact with the inner peripheral surface of the filter cage, and A filter characterized in that blades are provided that are inclined with respect to the inlet of the body, and the filter basket is rotationally driven by the force exerted by the fluid on the blades.