Recreation facilities maintenance personnel are highly professional, how to troubleshoot, please see the common skills of recreation facilities maintenance

一. Visual method

1. Use eyes, ears, noses, smells and hands to find out the cause of the malfunction. (See if there are any abnormal phenomena such as rupture, murmur in ears, odor in nose and overheating in hands, all of which should be carried out under safe conditions.)

2. Using various special instruments and instruments and special tools for testing, such as multimeter, clamp ammeter, infrared detector, micrometer, caliper, plug ruler, etc.

Visual method is one of the most basic methods of inspection and maintenance. In the process of implementation, the principle is simple first, then complex, first outside and then inside.

二. Contrast replacement method

Contrast replacement method is to eliminate the existing new parts and the parts on normal equipment by replacing the existing ones which have serious doubts about a certain part without corresponding testing tools on site. It should be noted that the new parts are replaced by the normal ones.

1. Can not be replaced in a large area.

2. No replacement of spare parts for suspected short-circuit burnout of components in order to avoid loss

三. Comparative analysis and judgment method

The method of comparative analysis and judgment is based on the working principle of the system, the action procedure of the control link and their logical relationship. It makes comparative analysis and judgment combined with the fault phenomena, reduces the link of measurement and inspection, and quickly judges the fault scope. For example, as long as a common power supply of several lines works normally, it shows that the power supply of other lines is also normal. Through analysis and comparison, it can be mentioned that the power supply of other lines is also normal. High speed of troubleshooting

四. Stepwise exclusion

In the actual production process, electrical faults occur in a wide range, and the faults are ever-changing. Random, there is no fixed mode and unified standard, only according to the specific situation of the fault, the gradual elimination is to segment the fault part to determine the fault scope and fixed barrier point.

五. Adjustment parameter method

In some circuits, the components are not damaged and the wiring is intact, but the system can not work properly because of the inappropriate adjustment of some physical quantities (such as time, displacement, current, resistance value, temperature feedback signal strength, etc.). At this time, the system should be adjusted according to the working principle of electrical appliances and the specific situation of equipment.六. Utilizing Temperature Difference Effect

This method USES the principle of heat expansion and cold contraction to reduce the tightness of the mating surface or the gap to realize the separation of parts.

七. Maintenance of equipment with self-made special tools

For some equipment, it is impossible to achieve the purpose of maintenance with ordinary daily tools. Some special-shaped tools (such as special hexagon, special sleeve planner, special test circuit board, etc.) should be specially made.

八. Using various welding techniques

In daily maintenance, we often use electric welding, oxygen welding, argon arc welding, laser welding and other technologies.

九. Detection using voltage, current and resistance

Electricians often use the abnormal phenomena of voltage, resistance and current to judge the fault point when maintaining the circuit.

十. Hydraulic Pressure. Some Skills in Maintenance of Pneumatic Equipment

Hydraulic system mainly has the following pressure faults

1. System Pressure Free

2. Low system pressure

3. Instability of system pressure

4. High system pressure and weak regulation

5. Unloading out of control

There is no pressure in the system.

The main problems are the pressure regulating system itself. For example, the damper hole of the relief valve is blocked, the sealing face of the relief valve has foreign matter, the main spool of the relief valve is jammed in the opening position, the solenoid of the unloading reversing valve is burned out, the signal of the breaking wire is finally developed, and the equipment restarts after a period of time. The pressure of the relief valve is zero. 1. The rust connection of the relief valve in the opening position 2. The reversal of the hydraulic pump motor 3. The hydraulic pump is blocked by the filter. Plug or suction pipe leakage can not suck oil. The pressure is zero after disassembly or replacement of equipment components during maintenance. Possible reasons 1. Hydraulic pump is not tightened to form volume 2. Hydraulic pump is not filled with oil, can not form oil film seal. 3. Reverse assembly of reversing valve core.

System pressure is not high

This problem is usually caused by internal leakage. The wear of hydraulic pumps forms a gap, which can not regulate the pressure and reduce the output flow. The wear of the mating surface of relief valves reduces the control pressure, and the system pressure also decreases. The wear of the actuator or the damage of the sealing make the system pressure drop.

The pressure of the system is unstable and fluctuates greatly with time. The main reason is that the oil temperature increases and the viscosity of the oil decreases. There are leaks in the system, the cooling effect is not good, the regulating bolt of the relief valve is loose, and the bubbles burst when the oil is mixed with the air pressure, causing vibration.

High system pressure and ineffective regulation

The main reason is the failure of the relief valve; the main letter is blocked in the open position or the control oil pipeline is blocked. The front end of the pilot valve is screwed.

Unloading out of control

The main reasons for this situation are that the main spool of the relief valve can not be fully opened, the pre-tightening force of the spring of the relief valve is too large, the spring is too long or the main spool is stuck, resulting in incomplete loading. The main spool of the relief valve can not be unloaded due to external reasons.

In the routine maintenance of hydraulic equipment, the direct maintenance method of seeing, hearing and touching is often used. If there is pressure to see the installation of oil pipeline, we will know about it. If the valve switch is on or off, we will know whether the coil indicator is on or off, and if we listen to the sound, we will know whether the oil pump is normal.

The principle of pneumatics is basically the same as that of hydraulic pressure, but the medium used is different.

The above methods are only a very small part of equipment maintenance. The skills in equipment maintenance come from the experience that maintenance personnel constantly sum up from practice. Every maintenance personnel has the skills in this respect. Here I just throw a brick to attract jade. I hope you can share your valuable experience more and more in order to further improve our technical level and do a good job in equipment maintenance.