CN212898939U - Belt drive screw compressor fault alarm device - Google Patents
Belt drive screw compressor fault alarm device Download PDFInfo
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- CN212898939U CN212898939U CN202021238476.6U CN202021238476U CN212898939U CN 212898939 U CN212898939 U CN 212898939U CN 202021238476 U CN202021238476 U CN 202021238476U CN 212898939 U CN212898939 U CN 212898939U
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Abstract
The utility model discloses a belt drive screw compressor fault alarm device, including the current monitoring unit, singlechip and alarm unit, the current monitoring unit is including the current sensor who is used for detecting compressor operating current, current sensor's detected signal sends into buffer circuit in proper order, handle in the amplifier stabilizing circuit, buffer circuit prevents effectively that instantaneous peak current from causing the damage to the device, amplifier stabilizing circuit forms resistance-capacitance feedback compensation in the amplification process of fortune ware AR1, guarantee signal continuously and stably exports, and simultaneously, fortune ware AR2 carries out closed loop positive feedback regulation to fortune ware AR 1's output signal, has greatly improved fortune efficiency of amplification, improve the response speed of device; when the working current of the compressor is detected to exceed the safety range, the single chip microcomputer outputs a high-level signal to control the alarm unit to work, so that an operator is reminded of overhauling in time, and the working state of the belt transmission screw compressor is accurately monitored.
Description
Technical Field
The utility model relates to a compressor fault protection technical field especially relates to belt drive screw compressor fault alarm device.
Background
In a transmission system of an air compressor, direct transmission and belt transmission can be generally divided, wherein the direct transmission of the screw air compressor refers to that a motor spindle drives a rotor through a coupling and a gear box for speed change, and the belt transmission mode allows the rotating speed of the rotor to be changed through belt pulleys with different diameters, so that the use effect and the safety performance are better. However, in the process of using the belt-driven screw compressor, the operating current of the compressor is too high and the automatic tripping fault is caused by the factors of too high exhaust pressure, loose belt drive (bevel machine), fault of the compressor body and the like, so that the operating current of the compressor needs to be accurately monitored.
So the utility model provides a new scheme to solve the problem.
SUMMERY OF THE UTILITY MODEL
To the above situation, in order to overcome the defects of the prior art, the present invention aims to provide a failure alarm device for a belt transmission screw compressor.
The technical scheme for solving the problem is as follows: the belt drive screw compressor fault alarm device comprises a current monitoring unit, a single chip microcomputer and an alarm unit, wherein the current monitoring unit comprises a current sensor used for detecting the working current of a compressor, the detection signal of the current sensor is sequentially sent into a buffer circuit and an amplification stabilizing circuit to be processed, the output signal of the amplification stabilizing circuit is sent into the single chip microcomputer to calculate real-time current data, and when the working current of the compressor is detected to exceed a safety range, the single chip microcomputer outputs a high-level signal to control the alarm unit to work.
Preferably, the buffer circuit includes a resistor R1, a capacitor C1, and a diode D1, one end of the resistor R1 and the capacitor C1 is connected to the signal output terminal of the current sensor, the other end of the resistor R1 and the other end of the capacitor C1 are connected to the cathode of the diode D1 and the input terminal of the amplification stabilizing circuit, and the anode of the diode D1 is grounded.
Preferably, the amplification stabilizing circuit comprises an operational amplifier AR1, a non-inverting input terminal of the operational amplifier AR1 is connected to a cathode of the diode D1, an inverting input terminal of the operational amplifier AR1 is grounded through a resistor R2, and is connected to an output terminal of the operational amplifier AR1 through a resistor R3 and a capacitor C2 which are connected in parallel, an output terminal of the operational amplifier AR1 is connected to a non-inverting input terminal of the operational amplifier AR2 and one end of the capacitor C3 through a resistor R4, a non-inverting input terminal and an output terminal of the operational amplifier AR2 are connected to a non-inverting input terminal of the operational amplifier AR1 through a resistor R5, the other end of the capacitor C3 is connected to one end of the varistor RP1, a cathode of the zener diode 1 and the single chip microcomputer, and a sliding terminal of the.
Preferably, the single chip microcomputer is selected to be STC89C 52.
Preferably, the alarm unit comprises a triode Q1, the base of the triode Q1 is connected with the output end of the single chip microcomputer and is grounded through a capacitor C4, the collector of the triode Q1 is connected with a +5V power supply through a resistor R6, and the emitter of the triode Q1 is grounded through an indicator light LED1 and an alarm LS1 which are connected in parallel.
Through the technical scheme, the beneficial effects of the utility model are that:
1. the utility model adopts the current sensor to detect the working current of the compressor in real time, the detection signal of the current sensor is sent into the buffer circuit to carry out RC buffer, and the diode D1 plays a role in absorbing the current peak value, thereby effectively preventing the damage of the instantaneous peak current to the device;
2. the amplifying and stabilizing circuit forms resistance-capacitance feedback compensation in the amplifying process of the operational amplifier AR1, and performs phase compensation on the amplified output waveform of the current detection signal to ensure that the signal is continuously and stably output; meanwhile, the operational amplifier AR2 performs closed-loop positive feedback regulation on the output signal of the operational amplifier AR1, so that the operational amplifier efficiency is greatly improved, and the response speed of the device is improved;
3. when the working current of the compressor is detected to exceed the safety range, the single chip microcomputer outputs a high-level signal to control the alarm unit to work, so that an operator is reminded of overhauling in time, and the working state of the belt transmission screw compressor is accurately monitored.
Drawings
Fig. 1 is a schematic circuit diagram of the current monitoring unit of the present invention.
Fig. 2 is a schematic circuit diagram of the alarm unit of the present invention.
Detailed Description
The foregoing and other technical matters, features and effects of the present invention will be apparent from the following detailed description of the embodiments, which is to be read in connection with the accompanying drawings 1 to 2. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
The belt drive screw compressor fault alarm device comprises a current monitoring unit, a single chip microcomputer and an alarm unit, wherein the current monitoring unit comprises a current sensor used for detecting the working current of a compressor, the detection signal of the current sensor is sequentially sent into a buffer circuit and an amplification stabilizing circuit to be processed, the output signal of the amplification stabilizing circuit is sent into the single chip microcomputer to calculate real-time current data, and when the working current of the compressor is detected to exceed a safety range, the single chip microcomputer outputs a high-level signal to control the alarm unit to work.
The current sensor selects a special mutual inductor for an air compressor of the ancorum company, and in order to prevent the detection circuit from being impacted when overcurrent occurs, a buffer circuit is firstly adopted to process a detection signal of the current sensor. As shown in fig. 1, the buffer circuit includes a resistor R1, a capacitor C1, and a diode D1, one end of the resistor R1 and the capacitor C1 is connected to the signal output terminal of the current sensor, the other end of the resistor R1 and the capacitor C1 is connected to the cathode of the diode D1 and the input terminal of the amplifier stabilizing circuit, and the anode of the diode D1 is grounded. The resistor R1 and the capacitor C1 form an RC delay circuit to buffer an output signal of the current sensor, and the diode D1 absorbs a current peak value, so that damage to the device caused by instantaneous peak current is effectively prevented.
The amplifying and stabilizing circuit amplifies an output signal of the buffer circuit, and the specific structure of the amplifying and stabilizing circuit comprises an operational amplifier AR1, wherein the non-inverting input end of the operational amplifier AR1 is connected with the cathode of a diode D1, the inverting input end of the operational amplifier AR1 is grounded through a resistor R2 and is connected with the output end of an operational amplifier AR1 through a resistor R3 and a capacitor C2 which are connected in parallel, the output end of the operational amplifier AR1 is connected with the non-inverting input end of an operational amplifier AR2 and one end of a capacitor C3 through a resistor R4, the inverting input end and the output end of the operational amplifier AR2 are connected with the non-inverting input end of an operational amplifier AR1 through a resistor R5, the other end of the capacitor C3 is connected with one end of a rheostat RP1, the cathode of a voltage stabilizing diode DZ1 and a single chip. The resistor R3 and the capacitor C2 form resistance-capacitance feedback compensation in the amplification process of the operational amplifier AR1, and perform phase compensation on the amplified output waveform of the current detection signal to ensure that the signal is continuously and stably output. Meanwhile, the operational amplifier AR2 performs closed-loop positive feedback regulation on the output signal of the operational amplifier AR1, so that the operational amplifier efficiency is greatly improved, and the response speed of the device is increased. The amplified current detection signal is coupled by a capacitor C3, the amplitude of the amplified current detection signal is stabilized by a voltage stabilizing diode DZ1 and then the amplified current detection signal is sent into the singlechip, and the rheostat RP1 has an effect of adjusting the amplitude of the signal input into the singlechip and ensures that the input signal of the singlechip is in a normal receiving range.
The utility model discloses when specifically using, the model is selected for use to the singlechip and is STC89C52, and STC89C52 periphery disposes the AD conversion mouth for the analog signal conversion who amplifies the stabilizing circuit output is the digital quantity, then calculates the real-time operating current of compressor by STC89C52 again. When the single chip microcomputer detects that the working current exceeds a preset safety range value, the single chip microcomputer outputs a high-level signal to drive the alarm unit to work. As shown in fig. 2, the alarm unit includes a transistor Q1, the base of the transistor Q1 is connected to the output end of the single chip microcomputer and is grounded through a capacitor C4, the collector of the transistor Q1 is connected to a +5V power supply through a resistor R6, and the emitter of the transistor Q1 is grounded through a parallel indicator light LED1 and an alarm LS 1.
To sum up, the utility model discloses a current sensor real-time detection detects the operating current of compressor, and current sensor's detected signal carries out the RC buffering in sending into buffer circuit to diode D1 plays the absorbing action to the electric current peak value, thereby effectively prevents that peak current from causing the damage to the device in the twinkling of an eye. The amplifying and stabilizing circuit forms resistance-capacitance feedback compensation in the amplifying process of the operational amplifier AR1, and performs phase compensation on the amplified output waveform of the current detection signal to ensure that the signal is continuously and stably output. Meanwhile, the operational amplifier AR2 performs closed-loop positive feedback regulation on the output signal of the operational amplifier AR1, so that the operational amplifier efficiency is greatly improved, and the response speed of the device is increased. The output signal of the amplifying and stabilizing circuit is sent into the single chip microcomputer, real-time current data are calculated, when the working current of the compressor is detected to exceed a safety range, the single chip microcomputer outputs a high-level signal to control the alarm unit to work, an operator is reminded of overhauling in time, and the working state of the belt transmission screw compressor is accurately monitored.
The above description is provided for further details of the present invention with reference to the specific embodiments, which should not be construed as limiting the present invention; to the utility model discloses affiliated and relevant technical field's technical personnel are based on the utility model discloses under the technical scheme thinking prerequisite, the extension of doing and the replacement of operating method, data all should fall within the utility model discloses within the protection scope.
Claims (5)
1. Belt drive screw compressor fault alarm device, including current monitoring unit, singlechip and alarm unit, its characterized in that: the current monitoring unit comprises a current sensor for detecting the working current of the compressor, detection signals of the current sensor are sequentially sent to the buffer circuit and the amplification stabilizing circuit for processing, output signals of the amplification stabilizing circuit are sent to the single chip microcomputer for calculating real-time current data, and when the working current of the compressor is detected to exceed a safety range, the single chip microcomputer outputs a high-level signal to control the alarm unit to work.
2. The belt driven screw compressor malfunction alerting device of claim 1, wherein: the buffer circuit comprises a resistor R1, a capacitor C1 and a diode D1, one end of the resistor R1 and one end of the capacitor C1 are connected with the signal output end of the current sensor, the other end of the resistor R1 and the other end of the capacitor C1 are connected with the cathode of the diode D1 and the input end of the amplification stabilizing circuit, and the anode of the diode D1 is grounded.
3. The belt driven screw compressor malfunction alerting device of claim 2, wherein: the amplifying and stabilizing circuit comprises an operational amplifier AR1, the non-inverting input end of the operational amplifier AR1 is connected with the cathode of a diode D1, the inverting input end of the operational amplifier AR1 is grounded through a resistor R2 and is connected with the output end of an operational amplifier AR1 through a resistor R3 and a capacitor C2 which are connected in parallel, the output end of the operational amplifier AR1 is connected with the non-inverting input end of the operational amplifier AR2 and one end of a capacitor C3 through a resistor R4, the inverting input end and the output end of the operational amplifier AR2 are connected with the non-inverting input end of an operational amplifier AR1 through a resistor R5, the other end of the capacitor C3 is connected with one end of a rheostat RP1, the cathode of a voltage stabilizing diode DZ1 and the single chip microcomputer, and the sliding.
4. The belt driven screw compressor malfunction alerting device of claim 3, wherein: the single chip microcomputer is selected to be STC89C 52.
5. The belt driven screw compressor malfunction warning device according to any one of claims 1 or 4, wherein: the alarm unit comprises a triode Q1, the base electrode of the triode Q1 is connected with the output end of the single chip microcomputer and is grounded through a capacitor C4, the collector electrode of the triode Q1 is connected with a +5V power supply through a resistor R6, and the emitter electrode of the triode Q1 is grounded through an indicator light LED1 and an alarm LS1 which are connected in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021238476.6U CN212898939U (en) | 2020-06-30 | 2020-06-30 | Belt drive screw compressor fault alarm device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021238476.6U CN212898939U (en) | 2020-06-30 | 2020-06-30 | Belt drive screw compressor fault alarm device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212898939U true CN212898939U (en) | 2021-04-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021238476.6U Active CN212898939U (en) | 2020-06-30 | 2020-06-30 | Belt drive screw compressor fault alarm device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212898939U (en) |
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2020
- 2020-06-30 CN CN202021238476.6U patent/CN212898939U/en active Active
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