JPH0121008Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention involves disposing a filter member between electrode plates facing each other in an oil flow path, and applying a high voltage between the electrode plates to form an electrostatic field. The present invention relates to an electrostatic filter in which carbon fine particles in oil are collected by the filter member.

Among this type of electrostatic filter, a cartridge type filter has been devised, making it extremely easy to replace the filter. In this cartridge-type electrostatic filter, a filter mounting adapter with an oil supply/drainage path to the filter and a detachable part for the filter container is installed in the oil flow path, and the electrode plate and filter member are housed in the container. The structure is such that the filter is attached to the upper adapter.

By the way, power is supplied to the above-mentioned conventional cartridge type electrostatic filter by protruding a power receiving plug from the filter container and fitting a socket for a high tension cord connected to a high voltage power supply generator into this plug. was.

However, with the power supply means as described above, it is necessary to insert and remove the socket each time the filter is replaced, and there is also the possibility that the socket may fall off due to poor contact between the plug and the socket or vibrations of the vehicle.

This invention was made with the aim of solving the above problems.While the adapter for attaching the electrostatic filter is provided with a power supply terminal for a high voltage power supply, the filter is also provided with a power receiving terminal, and the filter is connected to the adapter. It is an object of the present invention to provide a current-carrying terminal structure for an electrostatic filter in which the power feeding terminal and the power receiving terminal contact and conduct with each other when mounted.

The present invention will be explained below with reference to the illustrated embodiments.

Figure 1 shows the first embodiment of the present invention.
2 is an electrostatic filter, 2 is a filter mounting adapter, and the arrow in the figure indicates the direction of oil flow.

The container 11 of the electrostatic filter 1 is a cylindrical body made of metal with a bottom, and a bottom plate 12 made of electrically insulating plastic is fitted inside the container 11 and has a number of oil circulation holes formed at the bottom thereof. . A metal cylindrical member 13 is erected at the center of the bottom plate 12, and this cylindrical member 13
A filter body 4 is arranged between the container 11 and the peripheral wall of the container 11.

The filter body 4 is made by laminating film-like positive electrode plates 41 and negative electrode plates 42 in a roll with filter paper 43 interposed therebetween, and the innermost layer negative electrode plate 42 is stacked on the cylindrical member 13.
The outermost positive electrode plate 41 is in contact with the outer peripheral surface of the container 11.
is in contact with the inner peripheral surface of

The upper surface of the filter body 4 is pressed against a plastic upper plate 14 having a large number of oil flow holes. Above the upper plate 14 is a ring-shaped upper plate 15,
An annular cover plate 16 is provided. A large number of oil flow holes 16a are provided in the cover plate 16 at circumferential positions.

A mounting member 17 that also serves as a power receiving terminal is fitted into the upper end of the cylindrical member 13. An oil circulation hole is formed in the bottom of the mounting member 17, and a threaded portion is formed in the inner circumferential wall. Further, an O-ring 18 is provided on the upper plate 15 and the mounting member 17.

The filter attachment adapter 2 has a substantially T-shaped cross section, and its vertical portion is attached to the engine body. Inside the adapter 2 is an oil supply/discharge path 2 to the filter 1.
1 and 22 are formed, and the annular opening of the oil discharge passage 22 is connected to the through hole 16a of the cover plate 16.
matches.

A stepped cylindrical plastic spacer member 23 is inserted into the stepped hole in the center of the horizontal part of the adapter 2.
A metal mounting member 24, which also serves as a power supply terminal, is fitted through the terminal. The tip of the mounting member 24 is the adapter 2
The filter 1 protrudes from the lower surface of the horizontal part, and this protrusion has a threaded part formed on the outer periphery of the filter 1.
It is screwed into a threaded portion formed on the mounting member 17 of.
A flow port communicating with the oil supply path 21 is provided inside the mounting member 24 . Further, the other end of a high tension cord 31, one end of which is connected to the high voltage power generator 3, is screwed to the upper end of the mounting member 24. A rubber cap 32 is attached to the upper opening of the spacer member 23 into which the cord 31 enters.

On the other hand, a plate spring member 25 is provided on the horizontal lower surface of the mounting adapter 2 at a portion that comes into contact with the upper plate 15 when the filter 1 is mounted, and projects downward.

The operation of the current-carrying terminal of the present invention having the structure as described above will be described below.

When the electrostatic filter 1 is attached to the mounting adapter 2, the oil flow path of the filter 1 and the supply/discharge path 21 of the adapter 2,
22 are in communication and oil flows as shown by the arrow in the figure.

On the other hand, at this time, a negative voltage is applied to the mounting member 24 from the high voltage power supply generator 3 via the high tension cord 31, and this voltage is applied to the mounting member 17,
It appears on the negative electrode plate 42 of the filter body 4 through the cylindrical member 13. Further, since the container 11 of the filter 1 is grounded via the upper plate 15, the leaf spring member 25, and the attachment adapter 2, the positive electrode plate 41 of the filter 1 that is electrically connected to the container 11 has a ground potential. As a result, both electrode plates 4
An electrostatic field is formed between 1 and 42, and the negatively charged carbon particles in the oil are attracted and collected by the positive electrode plate 41, thereby purifying the oil.

As described above, according to the current-carrying terminal structure of the present invention, since the mounting members of the electrostatic filter and the mounting adapter are used as the power receiving terminal and the power feeding terminal, respectively, power is supplied to the filter at the same time as the filter is attached to the adapter. Therefore, there is no need for power supply wiring, and since the mounting members are securely screwed together, there are no problems such as poor contact when using a plug and socket, or the socket falling off due to vibrations of the vehicle.

FIG. 2 shows a second embodiment of the present invention, in which a metal support member 19 is fixed inside the cylindrical member 13 of the electrostatic filter 1, and a spring member 1a is mounted on the support member 19. It is posted. The support member 19 is provided with oil flow holes. The power receiving terminal 1b is a metal rod, and a flange portion formed at the lower end thereof is in contact with the spring member 1a. The power receiving terminal 1b is surrounded by a plastic insulating member 1c having a stepped portion, and the stepped portion of the insulating member 1c is pressed against the stepped portion of the upper plate 14' by the spring force of the spring 1a. . The outer periphery of the large diameter portion of the insulating member 1c is the third
As shown in the figure, it has a wave shape, and a large number of recesses formed along the axial direction serve as oil flow paths.
A threaded portion is formed on the inner peripheral surface of the hole in the cover plate 16' through which the power receiving terminal 1b is inserted.

On the other hand, a cylindrical mounting member 2 is provided at the opening of the oil supply path 21 located at the center of the horizontal part of the adapter 2.
4' is screwed on. A threaded portion formed on the mounting member 24' is threadedly engaged with a threaded portion on the cover plate 16'.
A plastic spacer member 23' on a bottomed cylinder is screwed above the mounting member 24', and a power supply terminal 26 is provided at the center of the bottom facing the oil supply path 21. The power supply terminal 26 is made by inserting a bolt with a concave head into a through hole provided at the bottom of the spacer member 23' and then tightening it with a nut. An O-ring 27 is inserted between the head of the bolt of the power supply terminal 26 and the spacer member 23', and a high-tension cord whose one end is connected to the high-voltage power generator 3 is attached to the shaft of the nut-tightened bolt. 31
The other end of is connected. Further, the distance between the power feeding terminal 26 and the horizontal lower surface of the adapter 2 is shorter than the protruding height of the power receiving terminal 1b of the filter 1.

The other structure of this embodiment is the same as that of the first embodiment.

The operation of the current-carrying terminal of the present invention having the above structure will be described below.

When the electrostatic filter 1 is attached to the mounting adapter 2, the supply/discharge passages 21, 22 of the adapter 2 and the oil flow passage of the filter 1 communicate with each other, and oil flows as shown by the arrow in the figure.

On the other hand, at the same time, the tip of the power receiving terminal 1b of the filter 1 is connected to the bolt head of the power feeding terminal 26 of the adapter 2 by a spring 1.
They are pressed together by the spring force of a. Thereby, the high voltage of the power supply terminal 26 reaches the cylindrical member 13 via the power receiving terminal 1b, the spring member 1a, and the support member 19. In addition, the container 11 of the filter 1 includes a lid plate 16' and a mounting member 2.
4' and the adapter 2. The subsequent carbon particle collection process is the same as in the first embodiment.

In this embodiment, since the power supply terminal 26 is not exposed, there is no risk of electric shock, and there is no need to check that the high voltage power supply generator 3 is de-energized when replacing the filter 1.

As described above, according to the current-carrying terminal structure of the present invention, when a cartridge-type electrostatic filter is attached to the filter mounting adapter, the power receiving terminal provided on the filter and the power feeding terminal provided on the adapter contact conduction. Therefore, there is no need for power supply wiring, making it easier to replace the filter, and improving reliability compared to conventional power supply using plugs and sockets.

[Brief explanation of the drawing]

Both FIG. 1 and FIG. 2 are overall cross-sectional views of an electrostatic filter and a mounting adapter equipped with the current-carrying terminal of the present invention, and FIG. 3 is a perspective view of the power-receiving terminal. 1... Electrostatic filter, 11... Electrostatic filter container, 17... Mounting member (power receiving terminal), 1b... Power receiving terminal, 2... Filter mounting adapter, 21... Oil supply path, 22 ...Oil discharge path, 24...Mounting member (power supply terminal), 26...Power supply terminal, 3...
High voltage power supply generator, 41... Positive electrode, 42... Negative electrode, 43... Filter member.

Claims (1)

[Scope of utility model registration request] A pair of electrodes that are arranged to face each other and form an electrostatic field by applying a high voltage, a filter member that is arranged between the electrodes and collects carbon particles in oil, and the electrode and the filter member. A power receiving terminal is installed on the electrostatic filter consisting of a container containing the
On the other hand, a power supply terminal is provided on the filter mounting adapter, which has an oil supply/drainage path to the filter and a filter attachment/detachment part, so that when the filter is attached to the adapter, the power receiving terminal and the power supply terminal contact and conduct. The current-carrying terminal structure of the electrostatic filter.