JPS59217314A - Core type reactor with gap - Google Patents

Abstract

PURPOSE:To suppress vibration and noise by providing oil paths, which are connected continuously to a through-hole, to a tightening plate which is pressed against a yoke. CONSTITUTION:A through-hole 10 is provided to the center of a yoke 5 and a tightening plate 11 are pressed against the yoke 5 at the bottom ends of tightening and connecting members 13 and oil paths 11a are provided to the tightening plate 11 so as to be connected continuously to the through-hole 10. Insulating oil 19 flows smoothly into the through-hole 10 from the bottom forming oil flow 23 as shown by arrows. The tightening and connecting members 13 are cooled uniformly from the bottom to the top so that the loosening of the tightening and connecting members 13 caused by the thermal expansion is eliminated and the increase of vibration and noise is avoided. By cooling the tightening and connecting members 13 uniformly and avoiding local temperature rise and suppressing the expansion of the tightening and connecting members 13, the decline of the tightening force along the axial direction of a main core leg 4 is suppressed so that vibration and noise are suppressed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a geared iron core reactor with an improved cooling structure.

[Technical background of the invention and its problems]

As shown in Fig. 1, the general structure of the core of a geared core type reactor body is a main body having a gap part (3), which is made by stacking a block core (1) and a gap material (not shown) made of an insulating material alternately. A core leg (4) is formed, yokes (5) and (6) are provided at both ends of the main core leg (4), and side legs (7) are provided on both sides.

This main body generates large vibrations in the gap part (3) due to the magnetic attraction force caused by the magnetic flux (8) passing through the gap part (3), causing noise. Therefore, it is necessary to firmly tighten the main core leg (4) in the axial direction with an appropriate force via the yokes (5) and (6) provided at both ends thereof.

Figure 2 shows the structure of a conventional insulated oil-filled geared core reactor. Block cores (1) and gap materials (not shown) are stacked alternately to form main core legs (4) having gap portions (3), and windings WM (
4a). A lower yoke (5) and an upper yoke (6) are arranged at both ends of this main core leg (4), and side legs (forces are arranged) on both sides respectively. ) and the yokes (5) and (6) with an insertion hole α0) formed in the center thereof. Also, abut the clamping plates aυ and yoke on the yokes (5) and (6), respectively. One side of the continuous tightening member (I3) inserted through the insertion hole (10) is fixed to the tightening plate θυ, and the other is fixed to the fixing plate (15) provided on the upper side of the tightening plate (121). αω (16) presses the clamping plate 02) to apply tension to the clamping connection member 03), and firmly attaches the main core leg (4) to the geared core reactor body. (17) (hereinafter abbreviated as the main body) is formed.The main body aη is housed inside the container 0 and filled with a cooling medium such as insulating oil 0ω to form a geared iron core reactor.

On the other hand, in the operating state of this reactor, the temperature of the block iron core (1), yoke (5), and yoke (6) shown in Figure 1 rises due to the magnetic flux (8) passing through the inside, and the temperature increases depending on the coefficient of thermal expansion. and extends in the axial direction. In addition, the continuous tightening member 031 (see Figure 2) provided at the center of the main core leg (4) also curves and widens between the magnetic flux (8) passing through the center and the gap portion (3), thereby forming a tightening connection. The magnetic flux (8) crossing the member α increases its temperature and extends in the axial direction. At this time, as shown in Fig. 2, if the clamping plates (11) and (121) of the block core (1), yokes (5), and (6) expand more than the clamping connecting member 03, the main Since the tightening force of the iron core leg (4) decreases and vibration and noise increase, it is necessary to suppress the temperature rise of the tightening connection member 03).

Furthermore, non-magnetic steel material is generally used for the tightening connection member (13) to prevent overheating due to magnetic flux (8), but this non-magnetic steel material is used for block iron core (1), yoke (5), (6)
) has a larger coefficient of thermal expansion than magnetic plates such as silicon steel plates, which are made of materials such as silicon steel plates, so effective cooling is required to further suppress temperature rises. In Fig. 3, in the gap part (3), the gap material (2) is generally made up of a plurality of cylindrical insulating members arranged, so the tightening connecting member (the first floor is cooled). Lower block iron core (
The lower surface of 1) is in close contact with the yoke (5), and this yoke (5)
) is in close contact with the clamping plate a, so the yoke (5)
The insulating oil (H) inside the insertion hole 0.0 provided in the main core leg (4) does not flow in from the bottom, resulting in stagnation of the insulating oil (2), which requires tightening of that part. Connecting member (13
) is insufficiently cooled, resulting in an increase in vibration and noise.

[Purpose of the invention]

The present invention has been made in consideration of the above points, and an object of the present invention is to provide a geared iron-core reactor that suppresses vibration and noise.

[Summary of the invention]

In order to achieve such an object, the present invention involves stacking iron core blocks with gap materials in between to form a main core leg, winding a winding around the main core leg, and winding the main core leg so as to sandwich the main core leg. A yoke is provided at both ends of the main core leg, an insertion hole is formed so as to pass through the yoke and the main core leg, a clamping plate is provided on the outside of each yoke, and the clamping plate is penetrated, The main body formed by tightening with a rod-shaped tightening connecting member inserted into the insertion hole is housed inside the container and filled with a cooling medium, and an oil pipe is connected to the tightening plate that contacts one of the yoke and communicates with the insertion hole. It is characterized by suppressing vibration and noise by providing a Preferably, the cooling medium is forcibly supplied to the insertion hole of the main core leg through an oil passage formed in one of the clamping plates.

[Embodiments of the invention]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An iron core reactor with a gear according to an embodiment of the present invention will be described below with reference to the drawings. The same parts as in FIGS. 1 to 3 are designated by the same reference numerals. In FIG. 4, a main core leg (4) having a gap portion (3) is formed by stacking block cores (1) and gap members (not shown) alternately, and a winding (4a) is formed on this main core leg (4). ). A lower yoke (5) and an upper vertical iron (6) are attached to both ends of this main core leg (4).
) are provided, and side legs (7) are provided on both sides. Then, an insertion hole CIO> is formed through the center of the main core leg (4) and the yokes (5) and (6). Then, tightening plates are attached to these yokes (5) and (6), respectively.
21.

One end of the rod-shaped tightening connection member Q3 that is pushed through the insertion hole a is fixed to the tightening plate αυ, and the other end is passed through the tightening plate α, and the upper side of this tightening plate (I It is fixed to the fixing plate aω provided at
6) to press the tightening plate (121) and tighten the connecting member (
13), and firmly tighten the main core leg (4) to remove the geared core reactor body (17) (
Hereinafter, it will be abbreviated as main body. ) to form. The lower tightening plate α1) has a roadway (l) that communicates with the insertion hole 00).
form la). As shown in FIG. 5, the gap portion (3) is formed by arranging a plurality of cylindrical gap members (2) made of, for example, an insulating material. The main body (I7) configured as described above is housed in a container (l) and filled with a cooling medium such as insulating oil O to form a geared iron core reactor (20).

Next, the effects of the present invention will be explained. As shown in Fig. 5, a roadway (11a) is attached to the lower end of the tightening connecting member (13) in a portion facing the insertion hole (10) provided at the center of the yoke (5), which is in contact with the tightening plate αυ. ), so insulation 1
Oil (191) flows into the insertion hole 00 from the bottom as shown by the oil flow (c) shown by the arrow. Therefore, unlike in the past (see Figure 3), stagnation is eliminated, and the tightening connection member α3
) can be cooled evenly from the lower end to the upper end, there is no loosening due to elongation due to temperature of the tightening connecting member (1→), and an increase in vibration and noise can be prevented.

Next, another embodiment of the present invention will be described with reference to the drawings in which the same parts as in FIGS. 4 and 5 are given the same reference numerals. In Fig. 6, a groove-shaped road (24) is provided in the tightening plate aυ, and this road (24) allows the insertion hole (1 In this way, the same effect as the first embodiment of the present invention can be obtained, and the strength of the clamping plate αD can be improved.

In FIG. 7, insulating oil (1ω oil flow (26
) through the cooling oil guide part (5).
It flows into the insertion hole (10) like an oil stream.

In this way, the cooling effect can be further improved compared to the first embodiment of the present invention.

〔Effect of the invention〕

As explained above, according to the present invention, the tightening connection member 03
) is evenly cooled to prevent a local temperature rise, and by minimizing the elongation of the transfer connecting member α3), it is possible to suppress the decrease in the axial tightening force of the main core leg (4).
It is possible to provide an iron core reactor with gears that suppresses vibration and noise.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram showing the magnetic flux distribution of a general gapped core, Fig. 2 is a partial cross-sectional front view of a conventional geared core reactor, and Fig. 3 is a detail showing the lower yoke portion of Fig. 2. 4 is a partially sectional front view of the geared core reactor of the present invention, FIG. 5 is a detailed sectional view showing the lower yoke portion of FIG. 4, and FIGS. FIG. 7 is a cross-sectional view showing the main parts of another embodiment of the invention. (1)...Block core, (2)...Gap material,
(3)...Gap part, (4)...Main core leg,
(4a)...Winding, (51, (6J...Yoke, (Force...Side leg, (8)...Magnetic flux, (1
0)...Through hole, (1υ, (121...)
Tightening plate, (ha) road, t13)...Tightening connection member, (19...Fixing plate, (16)...
Bolt, α car...body, (I (to)...container, α camphor...insulating oil, (20)...iron core reactor with gear knob, ID
, (23> , (c), 06) , (to)...oil flow, (foundation)--hodo, (5)--cooling oil guide department, agent patent attorney Inoue -Male

Claims (2)

[Claims] (1) Stack the core blocks with gap material in between to form the main core legs, and wind the windings around the main core IC and s legs.
A yoke is provided at both ends so as to sandwich the main core leg, an inserter is formed to pass through the yoke and the main core leg, and a tightening plate is provided on the outside of each yoke. In an iron core reactor with a gear lug, the main body is tightened by a rod-shaped tightening connecting member that penetrates the tightening plate and is inserted into the front transmitter insertion JL, and the main body is housed inside the container and filled with a cooling medium. , there is a clamping plate in contact with one of the yoke.
An iron core reactor with a gear lug that is characterized by having an oil passage that communicates with the self-insertion hole. (2) An iron core with a gear lug according to claim 1, in which the cooling medium is forcibly supplied to the insertion hole of the main core leg by connecting the seven ways formed on one of the clamping plates. shaped reactor.