JPH04102305A - Liquid-cooled type stationary induction apparatus - Google Patents

Abstract

PURPOSE:To prevent the local temperature rise of an core by flowing down a liquid cooling medium uniformly along the side of the iron core by providing a guide for forcibly deflecting the medium, flowing toward the peripheral wall on a tank side, vertically downward thereby feeding the liquid cooling medium downward uniformly along the side face of the care. CONSTITUTION:A liquid cooling medium 6 dropping down on a packing 3 flows to a space G side along a channel 3a and then deflected forcibly by a cooling medium guide 9 to flow downward into a space between the guide 9 and the side peripheral face of a core 2. Since the clearance between the side peripheral face of the core 2 and the guide 9 is narrow, the space between them is filled with the cooling medium 6 and in the vicinity of a bent portion of the guide 9, a turbulent flow comes about. And at a time when the cooling medium reaches the lower end of the guide 9, it turns to a laminar flow and flows down. Since the guide 9 is provided with a vertical guide 9a, a lateral divergent flow of the cooling medium 6 is suppressed. Accordingly, even if the quantity of the liquid cooling medium 6 is not increased, it flows in a condition where the space between the guide 9 and the side peripheral face of the core 2 is full of the cooling medium. And while running through the space between them, the cooling medium flows down along the side peripheral face of the core 2 in a form of laminar flow, whereby the side peripheral face of the core 2 can evenly be cooled down.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to stationary induction equipment using a liquid as a cooling medium.

(Prior art) Fig. 4 shows a conventional core cooling structure of a transformer using a liquid refrigerant. In Fig. 4, 1 is a transformer coil, 2 is an iron core, and 3 is an upper scissor is the lower scissor tree, 5
are wooden places, which are provided at various places to ensure a required gap size (hereinafter referred to as space G) between the side circumferential surface of the iron core 2 and the side circumferential wall of the tank 7. 6 is a liquid refrigerant;
The refrigerant flows down from the upper part of the tank 7, passes through the refrigerant groove 3a of the upper scissors 3, and flows down along the side peripheral surface of the iron core 2.

8 is a core holder.

In this configuration, the liquid refrigerant 6 flowing down from the upper part of the tank 7 is guided by the groove 3a of the upper scissors 3 as described above and flows to the side circumferential surface of the iron core 2, which is the heat generating part, to cool the iron core 2. , when the flow velocity of the liquid refrigerant 6 is high, the liquid refrigerant 6 does not flow down along the side circumferential surface where the iron core is, but jumps out into the space A between the iron core 2 and the tank 7, as shown in FIG. flowing down,
As shown in FIG. 5, liquid refrigerant is generated which spreads and flows down and does not contribute to the cooling of the iron core 2.

[Problem to be solved by the invention]

In this way, if part of the liquid refrigerant 6 no longer contributes to the cooling of the iron core 2, there is a risk that the local temperature of the iron core 2 will rise. liquid refrigerant is required.

This invention was made to solve the above problem.
It is an object of the present invention to provide a stationary induction device that can prevent a local temperature rise of an iron core by causing a liquid refrigerant to flow down uniformly along the side surface of the iron core.

[Means for Solving the Problems] In order to achieve the above object, the present invention abuts the surface of the upper scissor member and bends and hangs into the space between the iron core side circumferential surface and the tank side circumferential wall, so that the hanging part A refrigerant guide is provided to cover the side circumferential surface of the iron core at a predetermined distance from the side circumferential surface.

In the second aspect of the present invention, a plurality of vertical guides are provided on the circumferential surface of the refrigerant guide on the iron core side, which are lined up in the width direction of the refrigerant guide.

[Effect]

In this invention, the liquid refrigerant that tries to jump out from the refrigerant groove of the upper scissor member into the space between the iron core and the tank hits the hanging part of the refrigerant guide and directs its trajectory in the hanging direction, and there is also a vertical guide. In this case, the liquid refrigerant is prevented from spreading, so a laminar flow of liquid refrigerant is formed between the refrigerant guide and the core-side peripheral surface, and this laminar flow flows down along the core-side peripheral surface. Become.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

In FIG. 1, 9 is a refrigerant guide, and the horizontal part 9A
and a hanging part 9B, the horizontal part 9A is interposed between the upper surface of the upper scissors 3 and the core retainer 8, and the hanging part 9B is placed on the side peripheral surface of the iron core 2 at a certain interval. It is parallel. This spacing is considerably narrower than the spacing between the iron core and the tank 7. The hanging portion 9B of the coolant guide 9 may be long enough to cover the upper portion of the side peripheral surface of the iron core 2.

As shown in FIGS. 2 and 3, this refrigerant guide 9 has a vertical guide 9a that also serves as a liquid guide and 9b that serves as a spacer. The vertical guide 9a is provided on the iron core 2 side of the refrigerant guide 9, and the vertical guide 9b is provided on the tank 7 of the refrigerant guide 9.
It is provided on the side.

Since the other configurations are the same as those in FIG. 4, the same components are denoted by the same reference numerals.

In this configuration, the liquid refrigerant 6 that has fallen onto the scissors 3 shown above flows through the groove 3a toward the space G, and as shown in FIG.
and the iron core 2 side circumferential surface.

Since the space between the side circumferential surface of the iron core 2 and the refrigerant guide 9 is narrow, the liquid refrigerant 6 fills between them and becomes turbulent near the bend of the refrigerant guide 9, but by the time it reaches the lower end of the refrigerant guide 9. for,
It flows down in a laminar flow.

Moreover, since the liquid medium kite 9 is provided with a vertical guide 9a, as shown in FIG. 2, the liquid refrigerant 6 is prevented from spreading in the lateral direction.

Therefore, in this embodiment, even without increasing the amount of liquid refrigerant 6, the space between the refrigerant kite 9 and the side peripheral surface of the iron core 2 is filled and flows.
While passing between the two, the laminar flow flows down the circumferential surface of the iron core 2, and the circumferential surface of the iron core 2 is evenly cooled.

Further, since the sieve guides 9a and 9b of the refrigerant guide 9 serve as reinforcement, deformation etc. can be prevented even if the refrigerant guide 9 is used for many years.

〔Effect of the invention〕

As explained above, this invention provides a refrigerant guide that forcibly changes the direction of the liquid refrigerant that is about to jump out toward the tank side peripheral wall side to the hanging direction, so that between the iron core side peripheral surface and the refrigerant guide, Since it is possible to fill the liquid refrigerant and create a laminar flow, even when the flow rate of the liquid refrigerant is high, the liquid refrigerant can flow evenly around the iron core side circumferential surface, and evenly without flowing a large amount of liquid refrigerant. can be cooled to

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of essential parts showing an embodiment of the present invention, FIG. 2 is a view seen from the direction of arrow A in FIG. 1, and FIG.
Figure 4 is a cross-sectional view showing the core cooling structure in a conventional stationary induction device, Figure 5 is a view seen from the direction of arrow A in Figure 4, Figure 6 is B in Figure 4. FIG. In the figure, i - transformer coil, 2 - iron core, 3 - upper scissor tree, 3a - refrigerant groove, 4 - lower scissor tree,
Death place, 6-liquid refrigerant, 7-tank, 8-17 presser, 9-refrigerant guide, 9a, 9b-guide, G-space. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (2)

[Claims] (1) The upper scissor member and the lower scissor member are interposed to hold the iron core vertically, and a spacer is interposed between the iron core side circumferential surface and the tank side circumferential wall to secure a space between them, and the upper scissor member is In a stationary induction device having a plurality of refrigerant grooves provided in parallel on the upper surface with one end facing the space, the upper scissors are bent and suspended into the space by contacting the surface of the upper scissor member, and the hanging portion is connected to the iron core. A liquid-cooled stationary induction device comprising a refrigerant guide that covers a side circumferential surface at a predetermined distance from the side circumferential surface. (2) The liquid-cooled stationary induction device according to claim 1, wherein the refrigerant guide has a plurality of vertical guides arranged in the width direction thereof on the iron core side.