CN102943950A - Wire oil-air lubrication control method - Google Patents

Abstract

The invention discloses a wire oil-air lubrication control method. The technical solution is made without changing the equipment body. The specific steps are as follows: Step 1: Set the initial position of the electromagnetic reversing valve to the energized state ;The second step: start the motor to drive the gear pump to run, build up the oil pressure on the main oil circuit, the overflow valve limits the safe oil pressure, and the filter removes impurities in the lubricating oil; the third step: check whether the oil pressure reaches 6MPa within 20s; Four steps: If it reaches 6MPa, it means that there is no leakage or jamming at each lubrication point. The pressure oil is supplied to the oil-air mixer through the distributor to mix with compressed air and then sent to the lubrication point. The loading process is completed, and the electromagnetic reversing valve is de-energized , the gear pump stops running, and the oil pressure of the pipeline is unloaded; if it does not reach 6MPa, a fault signal is sent out, and the rolling line is shut down; Step 5: Delay for 5s, wait for the lubrication to be completed; Step 6: The electromagnetic reversing valve is energized, and the delay is 30s , go back to the second step to complete the cycle. The invention mainly solves the problem that the rolling line is shut down due to too long loading time of the oil-gas pump and the failure time is caused.

Description

Oil-air lubrication control method for wire rod

technical field

The invention belongs to the improvement of the oil-gas lubrication control mode, which is a method for solving mechanical faults by changing the oil-gas control flow.

Background technique

In the bearing lubrication of high-speed rolling mills, oil-air lubrication is a commonly used lubrication method today. In the wire rod production line, the oil and gas system is mainly used for the lubrication of rolling mill guides, transmission shafts, roll bearings and looper bearings. In the actual production process, one or several distributors are stuck or leaked, which will cause lubricating oil to leak from these faulty distributors, so that the pressure of the oil circuit cannot be established, and the lubricating oil cannot be evenly distributed to each Distributor, causing lubrication failure. This can be solved by ensuring the cleanliness of the oil and preventing dirt particles from clogging the distributor; compressed air is reversed into the main oil circuit. This is mainly because when the pump stops, the main oil circuit is unloaded, and the compressed air always has a pressure of 0.6MPa. If a certain distributor is not tightly sealed or slightly worn, the compressed air will flow back into the oil circuit. Therefore, in the next loading, the pressure oil must first press the compressed air out of the oil pipe to be supplied to the lubrication point, and the boosting time increases, which causes the pump to load for too long. Since the entire rolling line contains hundreds of distributors, and some distributors are located in high-temperature environments, the seals are easily damaged, so it is time-consuming and laborious to troubleshoot which distributor is faulty.

Contents of the invention

The purpose of the present invention is to provide a wire oil-air lubrication control method to solve the problem of downtime caused by the shutdown of the rolling line due to the long loading time of the oil-air pump.

In order to achieve the above object, the technical solution of the present invention is made without changing the device body, and its specific steps are as follows:

Step 1: Set the initial position of the electromagnetic reversing valve to the energized state;

Step 2: Start the motor to drive the gear pump to run, build up oil pressure on the main oil circuit, the overflow valve limits the safe oil pressure, and the filter removes impurities in the lubricating oil;

Step 3: Check whether the oil pressure reaches 6MPa within 20S;

Step 4: If it reaches 6MPa, it means that there is no leakage or jamming at each lubricating point. The pressure oil is supplied to the oil-air mixer through the distributor to mix with the compressed air and then sent to the lubricating point. The loading process is completed and the electromagnetic reversing valve fails The electricity and gear pumps stop running, and the oil pressure of the pipeline is unloaded; if it does not reach 6MPa, a fault signal is sent out, and the rolling line is stopped;

Step 5: Delay for 5S and wait for the lubrication to be completed;

Step 6: The electromagnetic reversing valve is energized, delay 30S, go to the second step again, and complete the cycle.

With the wire oil-air lubrication control method of the present invention, even if the seal of the distributor is worn, since the P port is blocked, the compressibility of the lubricating oil is not large, so the compressed air cannot reversely enter the main oil circuit; The loading time is shortened from the original 18S to 6S; due to the shortening of the loading time, the leakage is reduced, so that the amount of lubricating oil can be used for the oil required for the normal operation of the bearing, reducing waste.

Description of drawings

Figure 1 is a schematic diagram of oil-air lubrication.

Fig. 2 is a flow chart of oil and gas control in the present invention.

In the figure: 1. Gear pump 2. Motor 3. Relief valve 4. Filter 5. Pressure gauge 6. Pressure switch 7. Electromagnetic reversing valve.

Detailed ways

A wire oil-air lubrication control method, see Figure 1 and Figure 2, the control steps are:

Step 1: Set the initial position of the electromagnetic reversing valve 7 to the energized state;

Step 2: Start the motor 2 to drive the gear pump 1 to run, build up the oil pressure on the main oil circuit, the overflow valve 3 limits the safe oil pressure, and the filter 4 removes impurities in the lubricating oil;

Step 3: 20S internal pressure gauge 5 detects whether the oil pressure reaches 6MPa;

Step 4: If it reaches 6MPa, it means that there is no leakage or jamming at each lubrication point. The pressure oil is supplied to the oil-air mixer through the pressure switch 6 and the distributor to mix with compressed air and then sent to the lubrication point. The loading process is completed, and the electromagnetic The reversing valve loses power, the gear pump stops running, and the pipeline oil pressure unloads; if it does not reach 6MPa, a fault signal is sent and the rolling line stops;

Step 5: Delay for 5S and wait for the lubrication to be completed;

Step 6: The electromagnetic reversing valve is energized, delay 30S, go to the second step again, and complete the cycle.

With the wire oil-air lubrication control method of the present invention, even if the seal of the distributor is worn, since the P port is blocked, the compressibility of the lubricating oil is not large, so the compressed air cannot reversely enter the main oil circuit; The loading time is shortened from the original 18S to 6S; due to the shortening of the loading time, the leakage is reduced, so that the amount of lubricating oil can be used for the oil required for the normal operation of the bearing, reducing waste.

Claims (1)

1. wire rod oil-air lubrication controlling method,, its control step is:

The first step: the initial bit of solenoid directional control valve (7) is set as to get electricity condition;

Second step: starting electrical machinery (2) driven gear pump (1) running, set up oil pressure at working connection, relief valve (3) limits safe oil pressure, and filter (4) is removed lubricated well cuts;

The 3rd step: 20S internal pressure table (5) detects oil pressure and whether reaches 6MPa;

The 4th step: if reach 6MPa, illustrate that each lubricating point is without leakage, stuck, pressure oil is sent into lubricating point after being fed to oil-gas mixer and pressurized air mixes by pressure switch (6), distributor, loading procedure is finished, and solenoid directional control valve dead electricity, gear pump shut down, the off-load of pipeline oil pressure; If do not reach 6MPa, send trouble signal, rolling line is shut down;

The 5th step: postpone 5S, wait for lubricated finishing;

The 6th step: solenoid directional control valve (7) gets electric, postpones 30S, again arrives second step, finishes circulation.

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