JPS59100000A - Starter for load - Google Patents

Abstract

PURPOSE:To save the energy by connecting a load to a coupler when the rotating speeds of a motor and a coupler of a flywheel become the first speed value or higher, and separating the load from the coupler when the rotating speed of the coupler becomes the second speed value or lower which is lower than the first speed value. CONSTITUTION:When the output of a power source starts increasing, a motor 1 and a flywheel 2 start rotating, and when the rotating speed reaches the first speed omega1, a clutch 3 is engaged to connect to a rotary load 4 of a pump. The energy dissipated from the flywheel 2 is consumed by the acceleration, rotary load of the pump and the friction of the clutch. When the rotating speed is declerated to the second speed value omega2, the clutch 3 is disengaged, and the motor 1 and the flywheel 2 are released from the pump.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a load starting device 2, particularly output fluctuations 1-
This invention relates to a nine-load starting device suitable for power sources.

For example, when driving an irrigation water pump using a power source whose output fluctuates greatly, such as a solar type, pond, or wind power generation facility,
Conventionally, an auxiliary starting power source such as a storage battery and a starting control mechanism were required. This caused a large burden in terms of both cost and maintenance.

The present invention includes a motor, a flywheel coupled to and driven by the motor, a load driven by a combination of the motor and the flywheel, and a rotational speed of the combination increased to be higher than a first speed value. When the rotational speed of the coupled body decreases and becomes lower than a second speed value lower than the first speed value, the load and the coupled body are connected. By equipping a clutch with hysteresis that disconnects the power and cuts off the driving force, a simple mechanism can be used to start up nine loads and reduce the effective use of energy even from lightning or sources with large output fluctuations or from power sources with only a small output. It is something.

The contents of the present invention will be explained in detail below based on the drawings.

FIG. 1 is a configuration diagram showing an embodiment of a water pumping device to which the present invention is applied. (Fili water pipe water pipe. The shaft of the motor and flywheel are always connected, but the shaft of the pump, which has a 9-turn load, is connected via a clutch, and it can be connected or released under certain conditions. be done.

The clutch (3) uses centrifugal force or the like to be in a driving force transmitting state when the rotational speed of the combined body of the motor and flywheel is high, and to be in a driving force cutting state when the 0 rotational speed is low. Furthermore, this clutch has a hysteresis in its operation, and when the rotational speed (b) becomes higher than a predetermined first speed value, it changes from the disengaged state to the transmission state, and when the rotational speed becomes low, it changes to the second speed value, which is even lower than the first speed value. When the speed drops to the speed value, the transmission state changes to the cutoff state. If this hysteresis does not exist, even if the output of the power supply increases and the rotational speed of the motor and flywheel -h-it~, the clutch becomes in the transmission state, the rotational speed will immediately decrease when the load is connected, and the clutch will The system will be cut off again and the startup will repeatedly fail. On the other hand, in the case of hysteresis, even if the rotational speed decreases due to load connection, the clutch will not open unless the speed drops below the second speed value.

It becomes possible to start. 1st. The second velocity values are respectively (r+1,
ω2. Assuming that the moment of inertia of the flywheel and motor combination is 1, the effect of hysteresis corresponds to the storage of energy in a linear amount.

Q-1:c(ω1-ω2)・・・・・・・・・・・・
(1) If the design is made so that this stored energy Q is larger than the energy required to start the load, then the starting
You are sure to succeed once in a while.

FIG. 2 is a diagram illustrating the operating characteristics of a water pumping device to which the present invention is applied. FIG. 2(a) is a waveform diagram illustrating the fluctuation of the output P of the city 1 source over time t.

FIG. 2(b) shows the relationship between rotational speed ω and time t.

The rotational speed ωF of the combined body and the rotational speed ω of the pump that is the load
This is a waveform diagram showing the change in P over time, where the broken line represents the rotational speed of the combined body and the solid line represents the rotational speed of the pump. As shown in Fig. 2 (a), when the output of the power supply begins to rise, the motor and flywheel begin to rotate, and when the one-rotation speed reaches the first speed value ω1, the clutch is engaged and connected to the rotating load of the pump. Ru. The rotational speeds of the motor and flywheel are shown in Figure 2 (b).
), it decreases after the load is connected, as shown by the dashed line.
The rotational speed of the pump increases as shown by the solid line. Their rotational speeds closely match and enter a state of complete coupling. During that period, the energy released by the flywheel is consumed in the accelerating nine-turn load of the pump and the friction of the clutch. Therefore, in order to increase the utilization rate of stored energy and facilitate start-up.

It is desirable to design a large moment of inertia of the flywheel and a large coupling friction force of the clutch. The second speed value ω2 is the rotational speed at which the clutch rotates integrally (the second
It is set smaller than ω3) in Figure [b). on the other hand,
If the output of the power supply decreases, the rotation speed will decrease and the second
When the speed decreases to value ω2, the clutch opens and the motor and flywheel are released from the pump. Thereafter, the rotational speed of the motor temporarily increases due to a decrease in the load. In this case, it is possible that the rotational speed of the motor increases to the first speed value ω1-1:, but in that case, the clutch is engaged again and the starting mode is entered. However, if the output of the power supply fluctuates as shown in Fig. 2(a).

Even if such a restart occurs, it will end briefly and the device will stop. As a special condition, if the output of the lightning source is weak and the second speed value ω2 cannot be maintained for a long time,
This device operates intermittently with a pause rate corresponding to a lack of power output. That is, even when the output of the power source is extremely small, this device stores the energy of the power source in the flywheel and can use that energy for the driving load, albeit for a short period of time, so it can be used effectively.

FIG. 3 is a sectional view showing an embodiment of the clutch (3) according to the present invention, where 00 is a load side member, that is, a pump side member, C
33&'! Drive side member, i.e. flywheel, (C) is a shoe for transmitting driving force, C34N'; t spring, (
g) is a magnet. When the centrifugal force acting on the shoe wrapper overcomes the restraining force of the spring 04) and the magnet Cps, the shoe is pressed against the load side part 03, and the rotational force is transmitted by frictional force. Shoe (toward) - Aim for When the shoe (toward) opens towards the outer circumference, the distance from magnet 0○ becomes longer, so the restoring force towards the inner circumference becomes weaker and the shoe (towards) opens towards the outer circumference at the first rotation speed. There is no N element I unless it becomes smaller than the value of time. This allows the aforementioned hysteresis to occur.

FIG. 4 is a cross-sectional view showing another embodiment of the clutch (3) according to the present invention.
1) is the same as in Figure 3. If the spring c34) is arranged as indicated by J in the figure, the driving force cutoff state shown by the broken line in Fig. 2 will have a greater impact on the shoe (c) due to the tension force of the spring than the driving force transmission state shown by the solid line. Since the restoring force in the circumferential direction is strong, the above-mentioned hysteresis can be generated.

As explained above, according to the present invention, there is provided a motor.

a flywheel coupled to and driven by the motor; a load driven by the combination of the motor and the flywheel; and when the rotational speed of the combination increases to be higher than a first speed value, the load and the Connecting the coupled body to transmit the driving force, and when the rotational speed of the coupled body decreases to a second speed value lower than the first speed value, disconnecting the load and the coupled body to cut off the driving force. By providing a clutch with such hysteresis, it is possible to start a load and effectively use energy with a simple mechanism even from a power source with large output fluctuations or a power source with a small output.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram showing an embodiment of a pumping device to which the present invention is applied, and FIG. 2 is a waveform diagram illustrating t44-g during operation of the pumping device to which the invention is applied, and (a) This is a waveform diagram showing the fluctuation of the output P of the power supply with respect to time t, and its (b
) is the rotational speed OJF of the combination body and the rotational speed arp of the pump
FIG. 3 is a sectional view showing an embodiment of the clutch according to the present invention, and FIG. 4 is a sectional view showing another embodiment of the clutch according to the present invention. In the figure, the motor shown (2) is the flywheel. (31 is the clutch, (4) is the load, 01) is the load side member, and 0 is the drive side member 1. , (g) is a shoe for transmitting driving force, hash spring (Incorporated), and 051 is a magnet. Note that the same reference numerals in each figure indicate the same or equivalent parts. Agent Makoto Kuzuno - Figure 1 Figure 2 Procedural amendment (voluntary) Commissioner of the Japan Patent Office 1, Indication of the case Patent Application No. 1987-209703 2
, Title of the invention Load starting device 3, Relationship with the Xi incident to be amended Patent applicant address 2-3 Marunouchi 2-chome, Chiyoda-ku, Tokyo Name (601) Raryo Electric Co., Ltd. Representative piece 11
1 nin 8 part 4, agent address: Tsuku (;
No. 112, 3, J-5, subject of amendment (11, Detailed description of the invention in the specification (21, drawing 6, content of amendment, il+, 1 clutch on page 5, lines 18 to 19 of the specification, rotates integrally) Correct "N rotation speed that results in" to "minimum value of N rotation speed of the above combination." (2) Correct Figure 2 of the drawing as shown in the attached sheet. T Catalog drawing of attached documents (Figure 2) 1 Conversant or above

Claims (2)

[Claims] (1) The rotational speed of a motor, a flywheel coupled to and driven by the motor, a load driven by the combination of the motor and the flywheel, and the combination increases to be higher than a first speed value. When the load and the coupled body are connected to transmit driving force, the load and the coupled body are disconnected when the rotational speed of the coupled body decreases and becomes lower than a second speed value that is lower than the first speed value. A load starting device equipped with a clutch with hysteresis that cuts off the driving force. (2) The load starting device according to claim 1, wherein the stored energy of the difference between the first velocity value and the second velocity value in the combined body is greater than or equal to the starting energy of the load. (31) The load starting device according to claim 1 or 2, wherein the load is a pump.