JPS58116044A - Coolant circulating device for rotary electric machine - Google Patents

Abstract

PURPOSE:To uniformly decelerate the cooling velocity of the coil of a rotary electric machine and the components around the machine during stoppage by restricting the temperature controlling function of a system of the coil coolant circulating device during stoppage or in the step of stopping the machine. CONSTITUTION:A thermometer 7 varies the opening of a temperature control 3-way valve 5 in response to the output of a temperature measuring resistor 6, thereby adjusting the mixture ratio of the quantity of coolent from a stator coil coolant cooler 3 to the quantity of hot water from a cooler bypass line 4. When a generator is stopped or its stopping operation is started, a bypass contact 12 is closed, thereby shortcircuiting both terminals of the resistor 6. Accordingly, the opening of the valve at the cooler 3 side is throttled, and the opening of the valve at the cooler bypass line 4 side is operated toward the direction of opening the valve, thereby decelerating the cooling velocity of the stator coil 1 and the components around it, and it can stand by in the heated state to next operation starting time.

Description

[Detailed Description of the Invention] Technique of the Invention The present invention allows the minute hand to rotate synchronously in the process of stopping at the center or stopping at 12.
Rotation 1IL machine winding cooling water gong drum vI4l of Kazuka Soukame lineage
This invention relates to an improvement in cooling water circulation for rotating electric machine windings that restricts the i (cooling) function and gently reduces the temperature of the rotating electric machine windings and surrounding products during the stop period -j.

The technical background of the invention is 1t.

Synchronous generators that cool the stator windings by passing water through them have a self-cooling capacity of about 25"-301 of the rated output even if they lose the stator winding cooling water. The stator winding cooling water OIi wharf device controlled the temperature so that the direct load and stator winding cooling water inlet temperature remained within a constant range, which was completely unrelated to the output of the generator.

Figure 1 is a representative example of a system diagram of the solid stator winding string cooling water Dk lump equipment of a generator used in Japan, and the stator winding (1)
, Stator winding cooling water pump (2), Identifier winding cooling water cooler (8), Cooler (3) bypass line (4), Temperature & ilj princess three-blade three-way valve, side temperature resistor (6) ), temperature control needle (7), positioner (8), and cooler (81), consisting of a secondary cooling water valve (9), and the cooling water is passed as shown by the arrow. The secondary cooling water artificial valve (9) of Ku 2 (3) and Ku 2 (8) is designed and opened according to the Identifier winding cooling water heat exchange amount I at the rated output of the generator. has been done.

Regardless of the magnitude of the output of the generator, the winding temperature of the stator winding cooling water is detected by the #1 hook resistor (6), and the temperature of the winding of the stator winding cooling water is detected by the #1 hook resistor (6), and the temperature is set to 1iLWJI4 pointer hand (η, positioner (8) Temperature #I stolen through the three-way valve (change the opening degree of the stator winding cooling water cooler (8+) and the moisture ratio of the amount of cold water from the cooler bypass line (1) to 1tiiiu
A certain resonance was maintained.

Problems with the Background Art Therefore, even if the generator 11IL machine stops, temperature control continues, so the residual heat accumulated in the stator winding (1) and its surrounding components (not shown) is removed. F until
The i% identifier winding (1) is intoxicated more rapidly than continuing the cooling operation. This thing Peng driving.

There is no major problem in the PAGE 4 #IL machine for pace speed, which has few stops, because there are few stops, but in the 4# IL machine, which frequently starts and stops, as it is used for day and night electricity use. Since the rapid temperature change during operation and stop is repeated, the rodent winding (1) and its surroundings have the disadvantage of promoting MIA stress due to tension and contraction. Moreover, as a generator, even during the shutdown period, the SBM Ashikoichi Pre-Volume (1) In order to maintain the low electric power of the cooling water, this circulation device could not be stopped, which resulted in a failure. This is the same in a general rotor with a rotation speed of 11L, and also in the case where the rotor winding string is water-cooled.

Purpose of the Invention The present invention II'i round Temperature control 1 of the ig1 rotating winding cooling water circulation mass arrangement system in the process of stopping or stopping the private electric machine.
Rotating electric machine winding cooling system that automatically controls the cooling speed of the windings and their surrounding components during the stop period by restricting the function and keeping them in a warm state until the start of the first operation. The purpose is to provide a water circulation device.

Summary of the Invention In Ij1 of the present invention, the rotating electric machine stops (for example, field interruption in the case of a synchronous machine, armature voltage becomes zero, rotor rotation speed becomes zero, etc.) or the process leading to the stop (for example, the computer number automatic stop signal, the armature current is below the self-cooling overcurrent current, the output of the rotating machine or the Fi drive section is below the self-cooling damage amount of the rotating machine, etc.)
Bypassing the action of the #5 IIL resistor at the rotating electric machine winding cooling water inlet and restraining the cooling water source level adjustment function by the shelf temperature resistor 6; For the surrounding structure, the cooling rate of the product should be slow and uniform.

Keep it warm until the next operation starts.

Collection of Examples of the Invention - Example 1 A first example of the invention will be described below with reference to FIG. 2 and Summary 3.

FIG. 2 is a system R diagram of the solid foot winding cooling water ring device of the first embodiment, which includes the stator winding (1), the stator winding cooling water bonder (2), and the stator fF. Bypass line (4) of line cooling water cooler (all), cooler (8), i!iKM maintenance triangular square (5), 11 temperature resistor (6), bypass contact of RTD (6) -1 temperature !It is composed of an IL14 needle (7), a positioner (8), and a secondary cooling water valve (9) of Ku2 (81).

Figure 3 shows the control 1g of the bypass contact of the resistance temperature sensor (6).
1w1, and this fixed pre-winding is placed between the control bus (P) and (M)! I Shutdown or stop operation of the generator applying cooling water circulation ms Wax l When two people are present
) and the bypass contact (2) of the side temperature resistor (6) to J[i
Two coils are connected in series (two coils) that are closed by a T-shaped island.

Next (explaining the two effects.

Generator stop or stop operation l When two people are present f Two contacts (1
When 1G is blocked, the coil (9) is energized, the bypass contact (capital) of the II temperature resistor (6) is closed, both terminals of the side temperature resistor (6) are connected, and this -+i resistor (6
) is bypassed. Therefore, the input to the temperature control needle (7) is regardless of the actual temperature of the cooling water at the stator cooling water inlet, so that the side temperature resistance value is "zero", that is, the temperature of the cooling water at the stator winding cooling water inlet. The f1 degree is shown to be sufficiently low. Therefore.

The three-way valve (6) for the stator winding cooling water cooler (
When you squeeze the valve MU of the pulp, the cooler bypass line (1) is connected to the valve IN! Operate in direction C2 to fully open 62 degrees. Therefore, warm water passing through the cooler bypass line (1) circulates through the identifier winding (1), and the fixed pre-winding 1ii1 (1) and its surrounding components are cooled with a gentle temperature gradient. As shown by curve a in FIG. 4, it is possible to wait in a warm state until the start of the next operation. The song in Figure 4! 1 m1) is a reference (- is the conventional temperature change shown), and it is clearly seen that this example is superior.

Embodiment 2 An embodiment of Part 2 will be described with reference to FIGS. 5 and 6.

In the system diagram of the stator winding cooling water cooler in the example shown in Fig. (set.

Cooler (set of bypass lines (4), temperature adjustment three-way valve (6), resistance temperature sensor (6), temperature moderator (7), positioner (8J1 Cooler 2 (set of secondary cooling water population) Valve (e),
It consists of a contact (121) for cutting the ill temperature resistor (as a dummy resistor) and an α contact (12g) for inserting the dummy resistor.

Fig. 6 shows the control 4I circuit of the above contact (121) and the α contact (12s), and shows that the control bus (P) and (N) are ≦2, and the generator to which this stator winding cooling water circulation system is applied. Contact a that closes the station when it stops or enters a stop operation
- and a coil (to) which connects the above contact (12t) in a wJ curve and closes the above α contact (12g) in an excited state are connected in series.

The following 52 effects will be explained.

While the generator is running, the α contact (12g) in Figure 5 I: is closed, and the b contact (121) is blocked.

Resistance temperature sensor (6), temperature f adjustment needle (7), positioner (
8) And mfim maintenance three-way valve The three-way valve is normal I:1#, and the cooling water temperature at the I/O coil cooling water inlet is adjusted to a constant 62.

When stopping the generator or stopping operation C by two people, the coil wire in Fig. 6 is energized, and the b contact (1) in Fig. 5 is energized.
21) becomes - and the #I low temperature resistance element 6) is separated from the original temperature needle inventory path, and at the same time, the - contact (12m) is closed and a dummy resistor () is inserted.

Irrespective of the actual temperature of the cooling water at the inlet of the identifier winding, a signal representing the resistance value of the dummy resistor is input to the temperature IILwI4'viB needle (7). This dummy resistor is set to a value lower than the temperature of the 1 stator winding cooling water.

Embodiment 3 Next, a third embodiment C will be described with reference to FIG. 7 and jI8-.

7N is a system diagram of the stator winding cooling water circulation system of the -3 embodiment, and stator 4! line (1), stator winding cooling water pump (2), stator winding cooling water cooler (set, cooler 2 (
All bypass lines (4), temperature wI4 maintenance three-way valve (phrase, resistance temperature sensor (6), temperature adjustment 1 [(7), positioner (88 coo-y<button secondary cooling water inlet electric Valve (I
It is composed of I.

Figure 8 shows the control circuit of the electric valve (to).
Control bus (P), Oi) Seki C2, stop or stop operation of the generator to which this stator winding cooling water device is applied C
The first contact point (13i) that blocks the two people when they are together,
Coil (2)) that closes the electric valve by excitation, and the electric valve i
Connect the contact in series with the contact that opens when fully closed,
In addition, the control amount lit (P), (N) frontage, the second contact (13s) that is closed when the generator is operating, and the coil that opens the electric valve (to) by magnetism. Connect the four electric valves in series (the contacts that open when the valve is fully open).

Next, the effect will be explained.

In this example, the second contact (taS)
is blocked, so the coil is energized and the motorized valve -
is open, so the temperature of the conventional stator winding cooling water circulation system is low! When l m bi; is obtained and the electric valve is fully open, the fully open limit contact t? Since AI2+- is opened and the force that tries to close the motor-operated valve -2 no longer acts, the motor-operated valve (6) will not be damaged. Next, if the generator is stopped or a shutdown operation is in progress, the first
The contact (131) is closed, the coil (rotation) is energized, and the electric valve is closed. cooling water cooler
) (The cooling function of 81 stops.

Therefore, when the generator is stopped or stopped, both the cooling water passing through the stator winding-cooling water cooler 5 (set) and the cooling water flowing through the bypass fins (4) of the cooler (3) are hot water at the same temperature. Valve opening degree of temperature control three-way valve (5) 11!
Regardless of 1-2, the function of the Li II m antibody (6) was modified to 1 = 1, and hot water was passed through the stator winding (1), resulting in the same effect as in the first embodiment. It will be done. Moreover, since the secondary cooling water is stopped, energy saving effects can also be obtained.

Also, when the electric valve is fully closed, g is the fully closed limit contact.
is opened, and no further force is applied to close the electric valve (2), so there is no chance of damage to the electric valve (2).

Embodiment 4 Next 6: There are two fourth embodiments, which will be explained with reference to Fig. 9 and Fig. 1θ. This solenoid valve X is turned on so that it is closed by the excitation. The rest is as shown in Figure 7.

1st oIli! J is the control circuit for the solenoid valve, which includes the control variable II (P), (M), the contact (b) that closes when the stator winding cooling water circulation in Figure 9 enters, and the solenoid valve. - 1 coil to be excited to close 1 - and series C;
Connecting.

Next C: Explain that the action is ≦2.

When the generator is stopped or a stop operation is started, the coil is energized and the %Xa valve is closed, and the electronic winding cooling water cooler 2 is closed.
(Auxiliary secondary cooling water flows, implementation of Xie 3 ν1j and lW
1 effect can be obtained.

In addition, this book @ Ming is written above and is not limited to the refreshing example shown in Figure th, but can also be applied to other rotating electric machines, single trochanters, etc. Of course, it can be implemented with various modifications within the scope.

As described in detail of the invention, the present invention provides the following advantages: without impairing the functions of the rotating electrical machine windings and cooling water circulation system during operation, the rotating electrical machine windings and the cooling water circulation system can be It is possible to provide an extremely easy and inexpensive cooling water ring system that prevents unnecessary rapid cooling of peripheral components and allows the inside of the machine to stand by in a warm state until the start of the next operation. .

As a result of this, the rotation 'WI' which performs M-Run and Stop
In the L-type, the temperature change during operation and stop can be reduced, reducing the fatigue caused by repeated thermal expansion and contraction of the rotating electric machine winding and its surrounding components. 4. lNm011m simply iL light $1 Figure is a system diagram showing the conventional rotary electric machine winding cooling water circulation system, m2m, jgsZ, Figures 7 and 9 are the rotary electric machine winding cooling water ms of the present invention. The first part of the device. 2nd, 3rd. The system diagram 1N3, 6-1, 8, and 1O showing the fourth embodiment are control circuit diagrams of FIGS. 2, 5, 7, and 9, respectively, and circuit 4- is the control circuit diagram of FIG. FIG. 2 is a characteristic curve diagram showing the change in winding temperature of those shown in FIGS. 1 and 2;

1... Constant winding connected to the rotating electric machine winding 2... Pump 3... Cooler 4... Bypass line 5
...Three-sided square for temperature f adjustment 6...Il resistor 7
...Temperature control needle 8...Positioner 9...Secondary cooling water population valve 11, 15.21.22.26--Coil 12...Bypass contact 121...B contact 12
,...6th grade point 13...Contact point 131...
lN1 contact L3. ...1g2 contact 14...
Dummy resistor 19...Electric valve 5...Solenoid valve agent Patent attorney Mr. InoueFigure 1Figure 2Figure 3Figure 4Figure 5Figure 6Figure 7Figure 8Figure 9S tO diagram

Claims (1)

[Claims]
In #1ikk, in the process of stopping or stopping the rotating tIt machine 62, the function of the side temperature resistor at the winding string cooling water inlet is bypassed, and the side temperature resistor I: cold water control noodles II
Lli! Rotating machine cooling water IN#Ak11111t characterized by restricting functions. (a) A cooling water circulation #1 ring cage characterized in that the function of the #I turtle resistor is made by BINOX Co., Ltd., by short-circuiting the heat terminals of the side temperature resistor. (8) Bypassing the function of the side temperature resistor Fi The rotating electric machine winding string cooling described in item 1 is achieved by disconnecting the terminal of the side temperature resistor and inserting a replacement 6 dummy resistor. The bypass of the function of the water DIi increasing device O L41 iii L resistor is achieved by cutting off the secondary cooling water of the stator winding cooling water cooler. Rotating machine winding cooling water ring installed.