Three mechanical faults of Manifold Block hydraulic solenoid valve
1. Leakage: the leakage of Manifold Block hydraulic solenoid valve system software is divided into internal leakage and external leakage. Internal leakage refers to the whole process of leakage generated in the system software, such as the leakage on both sides of the piston rod of the hydraulic solenoid valve cylinder, the leakage between the valve core of the pressure regulating valve and the oil circuit board, etc. Although internal leakage does not easily cause damage to the hydraulic solenoid valve oil, due to the occurrence of leakage, the established control action may be affected until it causes system failure. External leakage refers to the leakage between system software and environmental factors. Hydraulic solenoid valve oil immediately leaked into the natural environment, in addition to the meeting hazard system software office environment, but also may lead to insufficient working pressure caused by common faults. Leakage of hydraulic solenoid valve oil into the natural environment also has the risk of fire accidents. Solution: The use of better quality seals, improve the processing accuracy of the equipment
2. Vibration: the vibration of Manifold Block hydraulic solenoid valve system software is one of its intractable problems. The impact caused by the high speed flow of the hydraulic solenoid valve oil in the pipeline and the impact caused by the whole process of opening and closing the pressure regulating valve are all caused by the vibration of the system software. Strong vibration will cause the control system posture is not correct, will also make some of the more precise instruments in the system error, resulting in system failure. Solution: Hydraulic solenoid valve pipeline should be fixed as far as possible to prevent a sharp turn. Prevent frequent change of fluid orientation, can not prevent to do a good job in damping countermeasures. All the hydraulic solenoid valve system software needs to have excellent shock absorption countermeasures, in addition to prevent the damage of the external vibration source system.
3, heating: because of the force transfer material (hydraulic solenoid valve oil) in the whole process of liquidity there are different positions of water flow, resulting in a certain amount of internal friction inside the liquid, in addition, there is friction in the middle of the liquid and pipe cavity, this is all caused by the rise in the temperature of the hydraulic solenoid valve oil. Temperature increase will lead to an increase in internal and external leakage, reducing its mechanical efficiency. At the same time, due to the high temperature, the hydraulic valve oil will expand, resulting in expansion, so that the operation posture can not be very good transmission. Solution: hot is the inherent characteristics of the hydraulic solenoid valve system software, can not be completely eliminated only as far as possible to alleviate. The application of cost-effective hydraulic solenoid valve oil, hydraulic solenoid valve pipeline layout should be as far as possible to reduce the appearance of elbow, the application of high-quality pipelines and pipe joints, hydraulic valves, etc.
The design of Manifold Block hydraulic valve block strictly controls the tolerance method of shape and position
The method to strictly control the tolerance of Manifold block hydraulic valve block.
Design of Manifold Block hydraulic valve block: 1. When processing Manifold block, the position tolerance is strictly controlled to meet the use requirements. The position tolerance value of Manifold Block hydraulic valve block is introduced as follows (for reference only):
The straightness of Manifold block between 6 faces is 0.05mm in service. Relative parallelism is o.03 mm in service.
2, the plane of the public service is 0.02mm. The straightness between the thread and its fitting surface is 0.05mm. The tolerance of straightness between all holes and the end faces is as 0.05mm.
3. In order to ensure the cleaning of the hydraulic system, the Manifold Block hydraulic valve block needs to remove burrs. At present, many manufacturers still use artificial deburring, but also use methane burst deburring. After the burr is removed from the hydraulic valve block, an industrial endoscopy is required to ensure that the burr is removed.
4. Clean the valve block. Remove all kinds of particle pollutants, corrosive substances and grease attached to the surface of the valve block.
In order to ensure that Manifold block valve block will not rust early in the process of use, the anti-rust treatment is carried out. The oil channels inside the valve block can be pickled and phosphating, and the appearance of anti-rust treatment technology mainly includes blue, cadmium plating, zinc plating, nickel plating and other appearance treatment.
After the valve block is used for a long time, it needs to be tested with an industrial endoscope to determine the possible internal rust, oil hole iron filings, debris in the hole, impurities, etc. For quick cleaning to ensure the normal operation of the hydraulic valve block.