Hydraulic power unit, the use, maintenance and general troubleshooting
一、Selection that
1. Read how to order the section of power unit, fill in according to the actual requirements specifications.
2. According to the need of the realization of the function of hydraulic, choose relevant hydraulic principle diagram.
3. According to the hydraulic cylinder load size and velocity of the piston, reasonable selection of gear pump discharge capacity, system work pressure and motor power hydraulic power unit, determine the technical parameters.
4. According to determine the motor and electromagnetic valve voltage form.
二、Cautions
1. please read carefully the instructions, and compares the product model and parameter is correct.
2. hydraulic power unit should be installed properly and pick up the correct. Note motor, electromagnetic valve is consistent with the power supply voltage (see chart), motor electric principle rotation direction is positive It (from the axial end see clockwise).
3. conventional dc motor is clearance type work week S2 = 2 4 min (a start working time); S3 = 10% ED (continuous working time of a work cycle about 10% of the time), Can't continuous operation. If choose 10 min duty of ac motor, also can not work continuously.
4. hydraulic power unit work pressure factory has adjusted the, to ensure that the use of good state please users don't literally adjust.
5. hydraulic power unit should use the oil viscosity of 27 43 mm motion/s (50 ℃) anti-wear hydraulic oil, the oil temperature is lower than 50 ℃ recommended YA-when N46, the oil temperature is above 50 ℃ Recommend using YA-N68, add oil shall be subject to the filtration precision for 30 um filter, the normal amount to 80% of the effective volume for the oil tank, oil temperature should be routine in-10 ~ 80 ℃ Range, especially cold area, should use low temperature of the hydraulic oil, such as YA-N32 by mechanical blending.
三、Simple fault recognition and elimination method
1. motor not turn, check the accuracy of the connection.
2. motor startup, oil cylinder don't rise or rise instability
(1) oil cylinder is too low, come on oil noodles to oil level of the provisions;
(2) the oil viscosity too big or too small, the recommendations for the use of the hydraulic oil;
(3) oil absorption mesh jams, clean or replace mesh;
(4) tubing not seal leak or suction, find out a flat, no seal and repair or changing tubing absorption;
(5) electromagnetic valve or manual valve has no closing, cleaning electromagnetic valve, manual valve or to change;
(6) vice manual electromagnetic valve open, and closed the emergency button emergency button;
(7) the electromagnetic valve electricity, cause the oil from the electromagnetic valve, check the unloading electrical lines;
(8) motor rotation reverse, check to reconnect;
(9) relief valve is not properly installed in place, or not adjusted the surge, check and reset pressure;
(10) coupling in place, or not installed improper selection reinstall or to change; check
(11) the gear pump the oil to place o-rings was the shock bad, remove the gear pump check and replacement of the o-rings.
3. and when unloading oil cylinder don't fall or fall instability
(1) the electromagnetic valve failed to electricity, the electrical wiring check;
(2) electromagnetic valve is not in conformity with the requirements of the input voltage, and reach the standard; check voltage
(3) electromagnetic valve or manual valve mesh jams, remove the clean or replace valve core;
(4) polarization time too long or overheating make electromagnet damage, check whether voltage, confirm the input signal over-voltage;
(5) the throttle valve is removing all up or pressure, adjustment or replacement.
4. not to protect the system pressure, the oil cylinder in the pressure to fall off
(1) check not sealed, cleaning check or replace oil seal;
(2) the electromagnetic valve, manual valve not sealed, clean or replace oil seal;
(3) ruled out oil cylinder itself does not keep the pressure, pressure will pick up in the oil to watch directly mouth, if the pressure is normal execution of a problem.
5. the fuel tank and valve between oil leakage of oil leakage or, o-rings wear or broken, check and replace the o-rings.
6. motor back cover or motor and valve between oil leakage of oil leakage or
(1) the piece of high pressure leaks oil, remove the motor check, if, notice manufacturer replacing the entire power unit;
(2) on the gear pump skeleton of the loose change gear pump, oil seal.
7. switch, motor continue to move after the cut off
(1) electrical connection error, check and correct connection;
(2) start switch burnt out, check, replace the power to start switch;
(3) ac contactor burnt out, check, replace the power ac contactor.
8. system noise too large
(1) systems exist for reciprocating air, work a few times, eliminate air;
(2) coupling is not properly installed or wear, check and reinstall or to change;
(3) motor failure, check motor and, when necessary, to change;
(4) don't long pole in work under pressure, relief valve when overflow began to stop work that.