JPH0622599U - Liquid cooled pump - Google Patents

Abstract

(57) [Abstract] [Purpose] When the liquid is used to pass through the liquid cooling chamber, the low temperature of the liquid itself causes the motor parts to perform a cooling action forcibly and when the motor rotates for a long time An object of the present invention is to provide a liquid-cooled pump that can avoid the high temperature phenomenon of [Structure] When heat and high temperature become a problem when the pump is used for a long period of time, the sucked liquid passes through the motor body so that it has a cooling effect and the pump sucks the liquid. Sometimes if you can't supply liquid,
The power source can be automatically turned off so that the pump does not run idle, and the power source is configured to recover and continuously rotate when the liquid is restored and supplied.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This proposal relates to a liquid-cooled pump, and when heat generation and high temperature become a problem when the pump is used for a long period of time, the sucked liquid passes through the motor body so that it has a cooling effect. At the same time, if the pump cannot supply the liquid when sucking the liquid, the power can be automatically turned off so that the pump does not run idle, and the liquid can be recovered and supplied. When that happens, the power supply will recover and continue to rotate.

[0002]

[Prior art]

 A conventional liquid pumping pump includes a motor part and a pump part, which are combined by adopting a joint shaft connection, and the motor casing and the pump seat are manufactured by casting process. The motor is configured to dissipate heat and cool it by using a fan installed on the common shaft, and the blades of the pump are designed to cool using liquid. However, if the supply of liquid is interrupted, there is a risk that the motor will break if the pump blades and motor continue to rotate at high temperatures. Therefore, in order to avoid such a situation in the conventional pump, the following three solutions are used.

A temperature switch is attached to the coils of the first to motors, and the power can be automatically turned off when the temperature of the coils exceeds a set value of the specified temperature, and the power supply is restored when the temperature of the coils drops. Is configured to. A pressure switch is attached to the inlet of the second liquid, and the pressure switch is configured to detect the magnitude of the pressure of the liquid by utilizing the characteristic of the metal spring. The third to differential relay systems are used to control the motor, and the power is cut off in the idling state with no load.

[0004]

[Problems to be solved by the device]

 The conventional one has the following problems. In the first case, the protection method of the temperature switch as described above is not effective unless it is operated for 15 to 30 minutes after the start of operation, resulting in insulation breakdown of the motor coil or damage to the pump blade. easy. In the second case, if the liquid is choppy, the motor may or may not rotate, which makes the motor fragile, and if metal springs are placed on the liquid, it is easy for debris to adhere, so there is no reliable effect. . In the third case, after the power is cut off, when the liquid is restored to normal supply, the motor cannot automatically restart and rotate, and must be re-started manually. .

The present application has been made in view of such problems of the conventional technique, and an object of the present application is to provide the following things.

[0006] Firstly, the motor designed to operate at low temperature has the characteristics of being waterproof and automatically stopping operation in the absence of water. It is a power-saving pump that does not have to be processed and does not have to be secondary pollution because it restarts and rotates, has the effect of preventing leakage, and does not need to be processed due to the extruded plastic casing.

Secondly, a liquid sensor is used to detect whether or not the liquid is normally entering, and when the liquid is not supplied to the pump or does not enter, the motor part of the pump is When the motor comes to an automatic stop and is refilled with liquid, the part of the motor is automatically restarted and configured to rotate.

[0008]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention is as follows. The present application relates to a liquid cooling type pump, and a double type casing is made by using extrusion technology. A hollow liquid cooling chamber is provided between both casings, and the liquid cooling chamber is connected to the pump chamber. Then, the sucked liquid first goes through the liquid cooling chamber to quickly lower the temperature of the motor, and a liquid sensor is installed in the liquid cooling chamber to detect whether the liquid is constantly entering. If the suspension time of the liquid exceeds the set time, the resistance value of the temperature sensor itself changes rapidly, the relay is controlled via the zener diode and the transistor to turn off the power, and the liquid restores the supply again. When it flows into the liquid cooling chamber, the resistance value of the temperature sensor changes to control the operation of the relay, and the motor is re-energized to restart and rotate. It has been.

[0009]

【Example】

 Examples will be described with reference to the drawings. First, as shown in FIG. 1, in the case of the present invention, a plastic that withstands high temperature processes is used as the material, the metal ring 221 is used as the fixed seat of the silicon steel plate of the motor, and extrusion is used to build a double casing. A ring-shaped wall 10 is provided between the outer casing 1 and the inner casing 2 to form a ring-shaped liquid cooling chamber 11.

The outer casing 1 and the inner casing 2 are the first and second walls of the liquid cooling chamber 11. In the inner casing 2, parts necessary for a conventional motor are combined, and for example, a metal ring 221 is used. The main shaft 23, such as the rotor 21, the stator 22 and the main shaft 23 fixed inside, is pushed by the bearing 24 into the copper bush 251 of the bearing seat 25 or into the copper bush 124 of the bearing seat 121 of the lid 12, respectively. Will be required to operate the motor. A double mechanical shaft seal 252 is provided on the main shaft in the bearing seat 25 at the portion where the motor and the pump are connected to each other, which has a leak preventing effect and is configured to prevent liquid from seeping into the inner casing 2. ing.

The ring-shaped wall 10 is formed on one side of the liquid cooling chamber 11 and serves as a third sealing surface of the liquid cooling chamber 11. Outside the ring-shaped wall 10, a column 13 extending outward is provided. The column 13 can be inserted into the hole 122 of the lid 12, the lid 12 is fixed, and one of the columns 13 is provided with a passage hole 131. The passage hole 131 is used for liquid cooling. Since the sensor 140 of the liquid sensor 14 is connected to the chamber 11 and is inserted into the passage hole 131 and sealed, the presence or absence of liquid in the liquid cooling chamber 11 can be directly detected.

The lid 12 is fitted into the pillar 13 through the hole 122, the bearing 24 is provided on the copper bush 124 in the bearing seat 121, the main shaft 23 is mounted on the bearing 24, and the lid 12 is provided with the arc-shaped hole 123. The arcuate hole 123 is a passage for inspecting the liquid for leaking in and out of the cord.

One end of the inner casing 2 is connected to the outside of the lid 12 and the other end of the inner casing 2 is connected to the inner casing 15 of the pump, and a protrusion 26 provided at the end of the inner casing 2 has an inner casing 2 of the pump. The inner casing 15 of the pump is fixed because the inner casing 15 of the pump is fixed. For this reason, the eccentricity of the main shaft 23 is reduced, the inner casing 15 of the pump is connected to the liquid cooling chamber 11 and becomes a fourth sealing surface of the liquid cooling chamber 11, and the other face of the inner casing 15 of the pump is A protruding ring-shaped edge 150 is provided, and is divided by the ring-shaped edge 150 into two spaces inside and outside.

Further, a concave tank 151 is provided outside the ring-shaped rim 150 and is fitted into the protrusion 26 of the inner casing 2, and liquid is drawn into the liquid cooling chamber 11 from the inlet 30 of the outer casing 3 of the pump. Since the inner casing 15 of the pump is provided with another passage 152, the liquid in the liquid cooling chamber 11 can enter the space surrounded by the ring-shaped edge 150, and the blade 27 When is driven by the main shaft 23, the liquid flows out toward the outlet 153 and is discharged from the outlet 31 of the outer casing 3 of the pump.

The outer casing 3 of the pump is used to connect to one surface of the outer casing 1, and the recessed tank 16, the leak-proof packing 32, and the inner casing 15 of the pump are provided between the outer casing 3 and the inner casing 15 of the pump. When 15 is tightly covered with the end surface of the inner casing 2, a pump chamber is formed between the outer casing 3 of the pump and the inner casing 15 of the pump.

The vanes 27, which are connected to the main shaft 23, are used to drive the liquid just as they are in the pump chamber, and the main shaft 23 is conventionally provided to prevent the liquid from seeping into the inside of the motor from the edge of the main shaft 23. A mechanical shaft seal 252 of the pump is attached, and an inlet 30 and an outlet 31 are provided in the outer casing 3 of the pump. Liquid is drawn from the inlet 30 to fill the liquid cooling chamber 11, and the pump of the inner casing 15 of the pump is pumped again. Through the passage 152 to enter the pump chamber between the inner casing 15 of the pump and the outer casing 3 of the pump, and is driven by the blades 27 and discharged from the outlet 31.

Since the right lid 4 is provided on the other end surface of the outer casing 1 and the leak-proof packing 41 and the lid 12 are provided between them, the right lid 4 is provided between the inner casing 2, the lid 12 and the right lid 4. Is formed with a pressure chamber and the right lid 4 is provided with a nozzle 42, and this nozzle 42 is formed by extrusion together with the right lid 4. Then, gas is injected from the nozzle 42, the gas enters the inner diameter of the inner casing 2 through the arc-shaped hole 123 of the lid 12, and when the motor is put into water again, it is placed between the inner casing 2 and the liquid cooling chamber 11. It can also be used to detect whether there is a leaking gap between the main shaft 23, the mechanical shaft seal 252 and the outer casing 15 of the pump.

2 and 3 are sectional views of the present invention, from which it can be found that liquid is drawn in through the inlet 30 of the outer casing 3 of the pump, and again after passing through the liquid cooling chamber 11. From the passage 152, it enters the pump chamber between the inner casing 15 of the pump and the outer casing 3 of the pump, is driven by the vanes 27 and is discharged from the outlet 31, and the motor parts provided in the inner casing 2 are effective. Leakage is prevented.

Further, a liquid sensor 14 is provided on the lid 12, and the liquid sensor 14 uses a thermosensitive resistor (THERMISTOR) as a sensor to measure the temperature when the liquid is flowing in the liquid cooling chamber 11. Also, by utilizing the temperature difference when the liquid is not flowing in the liquid cooling chamber 11, the sensor 140 of the heat sensitive resistor changes its own resistance value according to the change of the temperature, and the relay 141 in the liquid sensor 14 is changed. When activated, the motor will automatically start and control to rotate and stop.

FIG. 4 is a circuit diagram of the liquid sensor 14. The imported power source (power source) supplies the power to the bridge rectifier 143 again after the capacitor 142 has limited the current and dropped the voltage. The AC import end of the bridge rectifier 143 is in parallel with the sensor 140, and the sensor 140 is used to detect the liquid by the heat sensitive resistor, and the liquid is present in the liquid cooling chamber 11. When the sensor 140 of the heat sensitive resistor detects a relatively low temperature during the operation, the resistance value of the sensor 140 itself becomes high, so that the current passing through the bridge rectifier 143 increases and the export voltage of the bridge rectifier 143 increases. Improve.

When the transistor 145 is touched so as to be in the ON state at the same time that the zener diode 144 is activated, the relay 141 is activated, the imported power source passes through the motor to start and rotate, and the blade 27 rotates. To pump the liquid. When the liquid is not supplied to the liquid cooling chamber 11 for a long period of time, the temperature of the sensor 140 gradually rises, and the resistance value of the sensor 140 itself becomes low. Therefore, most of the current of the imported power is consumed by the sensor 140, When a large amount of current passes through the bridge rectifier 143 and the voltage at the export end of the bridge rectifier 143 also drops relatively, the zener diode 144 is turned off and the transistor 145 is turned off.

Therefore, the relay 141 does not operate, disconnects the power supply of the motor, stops the rotation of the motor, and the motor is prevented from being broken in a long-term, unloaded idle state, and is also in a liquid state. When the cooling chamber 11 starts to supply the liquid again, the relay 141 is activated again by detecting the sensor 140 of the heat sensitive resistance value, and the motor is restarted and rotated.

Further, for example, when the supply of the liquid in the liquid cooling chamber 11 is momentarily stopped or when the liquid passes through the air gap in the pipe, the resistance value of the sensor 140 gradually decreases, so Prevents the phenomenon of abnormal rotation of the motor starting and stopping without turning off the power of the motor.

[0024]

[Effect of device]

 Since the present invention is configured as described above, it has the following effects. Since the liquid is used to pass through the liquid cooling chamber, the low temperature of the liquid itself forces the cooling of the motor parts, thus avoiding the high temperature phenomenon when the motor rotates for a long time. You can In addition, the liquid sensor is used to detect whether or not the liquid is continuously replenished, thus preventing the motor from idling without supplying liquid for a long time, or at high temperature. To prevent the liquid from breaking, and when the liquid is replenished, it is detected again by the liquid sensor, the motor restarts and rotates, and the liquid sensor also stops the liquid supply for a moment or the air It has the ability to judge whether it is passing through a gap, and can prevent the phenomenon of abnormal rotation such as the motor rotating or stopping.

[Brief description of drawings]

FIG. 1 is an overall exploded perspective view.

FIG. 2 is a sectional view taken along line AA in FIG.

FIG. 3 is a vertical sectional view seen from the front direction.

FIG. 4 is a circuit diagram of a liquid sensor.

[Explanation of symbols]

 1 Outer casing 10 Ring-shaped wall 11 Liquid cooling chamber 12 Lid 121 Bearing seat 122 Hole 123 Arc-shaped hole 124 Copper bush 13 Pillar 131 Through hole 14 Liquid sensor 140 Sensor 141 Relay 142 Condenser 143 Bridge Mr. rectifier 144 Ziner diode 145 Transistor 15 inner casing of pump 150 ring-shaped edge 151 concave tank 152 passage 153 outlet 16 concave tank 2 inner casing 21 rotor 22 stator 23 main shaft 24 bearing 25 bearing seat 251 copper bush 252 mechanical shaft seal 26 protrusion 27 vane 3 outer casing of pump 30 inlet 31 outlet 32 leakproof packing 4 right lid 41 leakproof packing 42 nozzle

Claims (6)

[Scope of utility model registration request] 1. A double casing is formed by extrusion molding,
Between the outer casing and the inner casing is a liquid cooling chamber,
The inner casing is wrapped with a metal ring, and motor parts such as the rotor, stator, and main shaft are installed in the inner casing. The end surface of the inner casing is closed by the right lid, and the end surface of the outer casing with the lid is closed by the right lid. Since the end face is sealed with the inner casing of the pump and the outer casing is closed with the outer casing of the pump, the inner casing of the pump is sealed with the end face of the liquid cooling chamber of the inner casing and between the outer casing of the pump and the pump chamber. Since the liquid inlet is provided on the outer lid of the pump, it is possible to enter the liquid cooling chamber from the concave tank of the inner casing of the pump after the liquid has entered, Liquid cooling pump, characterized in that enters from the inner casing of the passage of the pump to the pump chamber by driving the vane provided in the pump chamber is configured so as to discharge from the outlet. 2. The liquid-cooled pump according to claim 1, wherein the metal ring wrapped in the inner diameter of the inner casing is a galvanized ring, which has a relatively good heat dissipation property and does not rust. 3. The liquid cooling pump according to claim 1, wherein the liquid cooling chamber is provided with a through hole, and the sensor of the liquid sensor is in contact with the through hole. 4. The right lid is provided with a nozzle, gas can be injected into the pressure chamber by the nozzle, enters the inner casing through the arc-shaped hole of the lid, and the casing inside the motor has a good hermeticity. The liquid-cooled pump according to claim 1, which is for inspecting whether or not it has a component. 5. The liquid sensor detects the temperature change between when the liquid is flowing and when the liquid is not supplied by the sensor, changes the resistance value of the sensor body, and activates the relay via the zener diode and the transistor. Control, so that the motor can continue to rotate when supplying liquid into the liquid cooling chamber or when the liquid supply is stopped instantaneously, and the liquid cooling chamber is stopped for a long time and does not replenish. Time,
The liquid-cooled pump according to claim 1, wherein the power of the motor can be cut off by a relay. 6. The sensor is a heat sensitive resistor.
The liquid-cooled pump described.