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Analysis of the Causes for the Sudden Pressure Drop in the Wet Spray Carriage
Release time:
2026-03-02
Source:
Author:
Summary:
A sudden drop in pressure during the operation of a wet spray carriage is a common malfunction. It is crucial to promptly and accurately identify the root cause of the failure to ensure smooth construction progress. The pressure drop may be caused by abnormalities in the hydraulic system, the pumping system, or multiple interconnected systems, necessitating a systematic analysis and troubleshooting approach.
I. Hydraulic System Factors
Hydraulic pump failure
The hydraulic pump is the power source of the system, and its failure will directly lead to a drop in pressure.
1. Severe internal leakage in the pump: worn distribution plate, excessive clearance between pistons and cylinder bores.
2. Pump body crack: Causes high-pressure oil to leak directly back into the oil tank.
3. Variable mechanism failure: Unable to establish the required pressure.
4. Drive shaft damage: Power transmission interrupted
Control valve group abnormality
Failure of various control valves can lead to loss of pressure control:
- The main relief valve spring is broken or the pressure adjustment has failed.
- The directional control valve has severe internal leakage, and the spool is worn.
- The pressure relief valve’s adjustment function is malfunctioning.
- The check valve is not sealed tightly, resulting in internal leakage.
Actuator issue
Fault symptoms of hydraulic cylinders and motors:
1. Damaged cylinder seal, resulting in internal or external leakage.
2. Decrease in motor volumetric efficiency
3. Mechanical jamming of the actuator
4. Sealing failure at the connection point
II. Pumping System Factors
Sealing system failure
Pressure loss due to poor sealing in the pumping system:
- The clearance between the delivery cylinder and the piston is too large.
- The sealing between the glass plate and the cutting ring is not tight.
- S Damaged seal in valve, pipe, and bearing
- Seals at various connection points have aged.
Wear of mechanical components
Wear of critical components leads to reduced efficiency:
1. Scratch on the inner wall of the delivery cylinder
2. Piston head excessively worn.
3. The stirring mechanism is jammed.
4. Transmission component damage
III. Impact of the Auxiliary System
Lubrication system failure
A chain reaction triggered by inadequate lubrication:
- The lubrication pump is malfunctioning.
- Lubrication line blockage
- Distributor failure
- Lubricant products are substandard.
Cooling system issue
The impact of temperature anomalies on the system:
1. The cooler is blocked or damaged.
2. The fan is not operating properly.
3. Hydraulic oil temperature too high
4. Oil viscosity decreases.
IV. Impact of External Factors
Operational factors
Pressure abnormalities caused by improper operation:
- Suddenly change the pumping rate
- Prolonged operation under overload conditions
- Equipment was not started or stopped according to the procedures.
- Improper parameter settings
Environmental factors
The impact of the working environment on equipment:
1. The ambient temperature is too high or too low.
2. Dust pollution is severe.
3. Abnormal humidity
4. Altitude variation impact
V. Oil and Filtration System
Oil fluid quality issues
System failure caused by abnormal oil fluid:
- Oil fluid contamination exceeds the standard.
- The oil model is incorrect.
- Oil emulsification and deterioration
- Oil level too low
Filter system malfunction
The impact of filter system failure:
1. The filter element is severely clogged.
2. The bypass valve is normally open.
3. Leak at the sealing area
4. Improper installation
6. Electrical Control System
Sensor failure
System abnormality caused by failure of the sensing element:
- Pressure sensor drift or damage
- The temperature sensor has failed.
- Position sensor failure
- Signal transmission interrupted
Control unit issue
Control system failure symptoms:
1. PLC Program error
2. Controller hardware failure
3. The solenoid coil is burned out.
4. Poor line contact
VII. Systemic Diagnostic Approach
Preliminary examination
Quickly determine the scope of the fault:
- Check the system for any obvious leaks.
- Observe the fluctuations of the pressure gauge.
- Listen to the operating sounds of the device
- Check the oil level and oil quality.
Professional testing
Systematic Fault Diagnosis:
1. Use a diagnostic scanner to perform the check.
2. Perform hydraulic system testing.
3. Analyze oil contamination levels
4. Check electrical system parameters
Conclusion
The reasons for the sudden drop in pressure of wet spray carts are complex and varied, requiring a systematic analysis from multiple aspects, including the hydraulic system, pumping system, and control system. It is recommended to establish comprehensive equipment maintenance records, conduct regular preventive maintenance, enhance operator training, and equip the site with necessary testing devices. Through scientific fault diagnosis and timely maintenance interventions, we can effectively prevent abnormal pressure failures, ensure stable equipment operation, and guarantee both construction progress and quality. At the same time, it is crucial to pay close attention to the collection and analysis of failure data, continuously optimize equipment maintenance plans, and improve the overall level of equipment management.
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Changsha Base:Hunan Zenxon Heavy Industry Technology Co., Ltd.
Address: Jinrong Tongxin International Industrial Park, Changsha High-tech Zone
Loudi Base:Hunan Haoda Heavy Industry Technology Co., Ltd.
Address: Loudi Avenue, Loudi High-tech Industrial Development Zone, Lianyuan City, Loudi City, Hunan Province
Telephone:400-186-0868
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