CN211038928U - Line breakage alarm system for gearbox heater of wind driven generator - Google Patents
Line breakage alarm system for gearbox heater of wind driven generator Download PDFInfo
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- CN211038928U CN211038928U CN201922144050.8U CN201922144050U CN211038928U CN 211038928 U CN211038928 U CN 211038928U CN 201922144050 U CN201922144050 U CN 201922144050U CN 211038928 U CN211038928 U CN 211038928U
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Abstract
The utility model discloses a aerogenerator gear box heater alarm system that breaks wire relates to wind power generation equipment technical field. The alarm system comprises a relay, a resistor, a temperature control switch, a resistance heater and a power-off alarm output circuit, wherein the relay is provided with a current coil and a voltage coil, a contact switch of the relay is closed when one of the current coil and the voltage coil is electrified, and the contact switch is disconnected when the current coil and the voltage coil are both electrified; the current coil and the temperature control switch are connected in series to form a current monitoring loop, the voltage coil and the resistor are connected in series to form a voltage monitoring loop, and the current monitoring loop and the voltage monitoring loop are connected in parallel; the resistance heater is connected in series with the current monitoring loop; the relay contact switch is connected in parallel with the power-off alarm output circuit. When the heater works, the current/voltage monitoring circuit is used for monitoring the broken line, and when the heater does not work, the voltage monitoring circuit is used for monitoring the broken line, so that the all-dimensional monitoring of the broken line of the heater is met, and the problem that the broken line of the heater cannot be found in time due to unattended operation is avoided.
Description
Technical Field
The utility model relates to a wind power generation equipment technical field, concretely relates to aerogenerator gear box heater alarm system that breaks.
Background
Wind energy is increasingly gaining attention as a clean renewable energy source in all countries of the world. The gearbox of the wind generating set has the function of changing low-rotation-speed mechanical energy obtained by a wind wheel into high-rotation-speed mechanical energy in a constant-power mode in a transmission system. Besides the defects and installation factors of the gearbox, the temperature of the oil in the gearbox is related to whether the gearbox can normally operate, and the fault rate of the gearbox is greatly increased when the oil temperature is too high or too low. The oil temperature of the gear box is preferably in the range of 10-80 ℃, and when the oil temperature is too low, the lubricating oil in the gear box can be heated by an oil heater at the bottom of the gear box.
At present, most of wind power plants are located in high-altitude areas, the temperature is low in winter, a gear box heater is in a long-time heating state, the heating resistor is easily damaged, and at this time, a wire breakage alarm device is urgently needed to monitor, so that workers can timely know the wire breakage state of the heater and timely maintain and overhaul. At present, most units are provided with a monitoring device for monitoring whether a heater is broken in the heating process. However, in the time period when the heater is not operated, the monitoring device cannot monitor the heater due to aging of the heater or a broken wire caused by external factors. If the situation can not be found in time, the use requirement can not be met when heating is needed, and the wind generating set is usually in an unattended state, and an untimely state is easy to occur in overhauling, so that the operation of an electric field is delayed, and economic loss is caused.
In summary, a line breakage alarm system of the gear box heater is urgently needed to be designed, wherein the line breakage alarm system can monitor whether the heater is broken when the heater works, and can monitor whether the heater is broken when the heater does not work, and the use requirement of the wind generating set is met.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a aerogenerator gear box heater alarm system that breaks line solves current heater broken line and reports to the police and can't carry out the problem monitored to its broken line when the heater is out of work.
In order to solve the technical problem, the utility model adopts the following technical scheme: aerogenerator gear box heater alarm system that breaks, its characterized in that: the relay is provided with a current coil and a voltage coil, a contact switch of the relay is closed when one of the current coil and the voltage coil is electrified, and the contact switch is disconnected when the current coil and the voltage coil are both electrified; the current coil and the temperature control switch are connected in series to form a current monitoring loop, the voltage coil and the resistor are connected in series to form a voltage monitoring loop, and the current monitoring loop and the voltage monitoring loop are connected in parallel and then connected in series with the resistance heater; and the relay contact switch is connected with the power-off alarm output circuit in parallel.
A further technical scheme is that a fuse is also connected in series in the voltage monitoring loop.
The working principle is as follows: the mains supply is added at two ends of the system, when the oil temperature of the gearbox is reduced to the heating temperature, the temperature control switch is closed, the resistance heater is electrified to heat lubricating oil in the gearbox, the voltage monitoring loop and the current monitoring loop are both in an electrified state at the moment, a current coil of the relay is connected with the resistance heater in series, the current coil is electrified, a voltage coil connected with the current coil in parallel is also electrified, the relay acts, and the contact switch is closed.
If the heater is disconnected at the moment, the loop is disconnected, the current coil loses power, the voltage coil loses power, the relay loses power, the normally closed contact switch of the relay is disconnected, the power failure alarm output circuit is powered on, and an alarm is given out to remind operation and maintenance personnel to process in time.
When the heater does not work, the current monitoring loop is in an open state, the voltage monitoring loop is in a closed state, the voltage coil is electrified, the relay acts, and the contact switch is closed.
If the heater is disconnected at the moment, the voltage monitoring circuit is disconnected, the voltage coil loses power, the relay contact switch is disconnected, the power failure alarm output circuit is powered on, the heater disconnection alarm is sent out, and operation and maintenance personnel are reminded to handle the heater in time.
A resistor with the resistance value of about 1k omega is connected in series in the voltage monitoring loop to divide voltage of the voltage coil, so that the voltage coil is prevented from being damaged when voltage fluctuates; in order to ensure that the voltage coil is not damaged in the event of an overload, a fuse, also called a fuse, is also arranged in the voltage monitoring circuit.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model provides a simple structure, practical aerogenerator gear box heater disconnection alarm system, use the relay that is provided with voltage coil and current coil simultaneously, through set up voltage coil in voltage monitoring circuit, the current coil sets up in current monitoring circuit, set up current monitoring circuit and voltage monitoring circuit parallelly connected simultaneously, realize carrying out the disconnection monitoring through electric current/voltage monitoring circuit when the heater is worked, carry out the disconnection monitoring through voltage monitoring circuit when the heater is out of work, the all-round control of aerogenerator gear box heater disconnection has been satisfied, avoid because of unmanned on duty, can not discover the problem of heater disconnection in time, especially when the heater is out of work.
Drawings
Fig. 1 is the circuit diagram of the broken wire alarm system of the heater of the middle gear box of the utility model.
In the figure: 1-relay, 2-resistance, 3-temperature control switch, 4-resistance heater, 5-power-off alarm output circuit, 6-fuse, 11-current coil, 12-voltage coil and 13-contact switch.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Examples
FIG. 1 shows a wind driven generator gearbox heater disconnection warning system, which is characterized in that: including relay 1, resistance 2, temperature detect switch 3, resistance heater 4 and outage warning output circuit 5, relay 1 is provided with current coil 11 and voltage coil 12, and its contact switch 13 is closed when one of current coil 11 and voltage coil 12 gets electric, breaks off under both lose the electricity circumstances.
The current coil 11 and the temperature control switch 3 are connected in series to form a current monitoring loop, the voltage coil 12 and the resistor 2 are connected in series to form a voltage monitoring loop, and the current monitoring loop and the voltage monitoring loop are connected in parallel and then connected in series with the resistance heater 4. And a contact switch 13 of the relay 1 is connected with the power-off alarm output circuit 5 in parallel.
The mains supply is added at two ends of the system, when the oil temperature of the gearbox is reduced to the heating temperature, the temperature control switch 3 is closed, the resistance heater 4 is powered on to heat lubricating oil in the gearbox, at the moment, the voltage monitoring loop and the current monitoring loop are both in a powered state, the current coil 11 of the relay 1 is connected with the resistance heater 4 in series, the current coil 11 is powered on, the voltage coil 12 connected with the current coil in parallel is also powered on, the relay 1 acts, and the contact switch 13 is still in a normally closed state.
If the heater is disconnected at the moment, the loop is disconnected, the current coil 11 loses power, the voltage coil 12 loses power, the relay 1 loses power, the normally closed contact switch 13 of the relay is disconnected, the power failure alarm output circuit 5 is powered on, and an alarm is given out to remind operation and maintenance personnel to process in time.
When the heater does not work, the current monitoring loop is in a disconnected state, the voltage monitoring loop is in a closed state, the voltage coil 12 is electrified, the contact switch 13 is still in a normally closed state, and the power failure alarm output circuit 5 is in short circuit and is not electrified.
If the heater is disconnected at the moment, the voltage monitoring loop is disconnected, the voltage coil 12 loses power, the relay contact switch 13 is disconnected, the power failure alarm output circuit 5 is powered on, the heater disconnection alarm is sent out, and operation and maintenance personnel are reminded to process in time.
The resistance value of the series resistor 2 in the voltage monitoring loop is about 1k omega, and the series resistor is used for dividing voltage of the voltage coil 12, so that the voltage coil 12 is prevented from being damaged when voltage fluctuates.
In order to ensure that the voltage coil is not damaged in the event of an overload, a fuse 6, also called a fuse, is also arranged in the voltage monitoring circuit. The safety and the reliability of the heater disconnection warning system are ensured.
Although the invention has been described herein with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this invention. More particularly, various variations and modifications are possible in the component parts and/or arrangements within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, other uses will also be apparent to those skilled in the art.
Claims (2)
1. The utility model provides a aerogenerator gear box heater alarm system that breaks, its characterized in that: the intelligent temperature control device comprises a relay (1), a resistor (2), a temperature control switch (3), a resistance heater (4) and a power-off alarm output circuit (5), wherein the relay (1) is provided with a current coil (11) and a voltage coil (12), a contact switch (13) of the relay is closed when one of the current coil (11) and the voltage coil (12) is powered on, and is opened when both are powered off;
the current coil (11) and the temperature control switch (3) are connected in series to form a current monitoring loop, the voltage coil (12) and the resistor (2) are connected in series to form a voltage monitoring loop, and the current monitoring loop and the voltage monitoring loop are connected in parallel and then connected in series with the resistance heater (4);
and a contact switch (13) of the relay (1) is connected with the power-off alarm output circuit (5) in parallel.
2. The wind turbine gearbox heater disconnection warning system of claim 1, wherein: and a fuse (6) is also connected in series in the voltage monitoring loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922144050.8U CN211038928U (en) | 2019-12-04 | 2019-12-04 | Line breakage alarm system for gearbox heater of wind driven generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922144050.8U CN211038928U (en) | 2019-12-04 | 2019-12-04 | Line breakage alarm system for gearbox heater of wind driven generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211038928U true CN211038928U (en) | 2020-07-17 |
Family
ID=71565210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922144050.8U Active CN211038928U (en) | 2019-12-04 | 2019-12-04 | Line breakage alarm system for gearbox heater of wind driven generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211038928U (en) |
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2019
- 2019-12-04 CN CN201922144050.8U patent/CN211038928U/en active Active
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