Hardi Mechanical Diaphragm Pump Flow Reduction Maintenance After sales

Hardi Mechanical Diaphragm Pump Flow Reduction Maintenance After sales:
Increase hydraulic oil to the normal level of the oil tank: If the hydraulic oil level is too low, it will affect the normal operation of the high-pressure pump
At the same time as reducing hydraulic shock, they also adjusted the overall flow regulation of the variable displacement pump to ensure its normal operation. Pneumatic diaphragm pump is a widely used mechanical pump, which has the advantages of simple structure and easy use, but it is inevitable to encounter failures in actual operation. This article will provide you with a detailed introduction to the common causes of faults and their maintenance methods based on the experience of Yongqiu Pump Industry. It should be noted that during maintenance, the gas and power sources should be removed first, and personnel safety should be ensured.

Hardi Mechanical Diaphragm Pump Flow Reduction Maintenance After sales
1. Pump head leakage is one of the common faults of pneumatic diaphragm pumps, which may be caused by damage or aging of the pneumatic drive membrane, wear or dirt on the sealing surface of the pump head, and poor sealing of the inlet or outlet valves of the pump head.
2. Pump body leakage is another common fault, which may be caused by wear or dirt on the sealing surface of the pump body, damaged or aged diaphragm, and poor sealing of the inlet or outlet valve of the pump head.
3. The inability of pneumatic valves to control the start and stop of pumps is another common fault of pneumatic diaphragm pumps, which may be caused by poor contact of the pneumatic valve control circuit, internal component failures of the pneumatic valve, insufficient or excessive air pressure.
4. There may be abnormal noise or vibration in the pump body, which could be caused by improper or damaged diaphragm installation, impurities or dirt inside the pump body, loose connection between the pump body and the base, or uneven base.
Hardi Mechanical Diaphragm Pump Flow Reduction Maintenance After sales
When the direction of the oil port is not suitable and inexperienced customers adjust it themselves, if the pump core is not inserted into the small hole (caused by pulling out during rotation), the space of the oil pump suction port will shrink, and the oil suction will be obstructed and not smooth. This is manifested as: excessive noise, pressure swing, long-term use will cause the oil temperature to rise too quickly, and the stator curve will be impacted into a ripple shape, which will shorten the service life. Common methods include: ① try to reduce the system's start, stop, and reversing frequency as much as possible; ② For hydraulic systems that require frequent directional changes, try to use directional valves with dampers as much as possible; ③ Install an accumulator in front of the control valve to reduce the distance of shock wave propagation and thus mitigate hydraulic shock; ④ Increase the diameter of the pipeline, shorten the length of the pipeline as much as possible, or use rubber hoses; ⑤ Set up a safety valve to reduce pressure shock when the system pressure increases. Fourthly, choose hydraulic oil reasonably. When hydraulic oil flows in the pipeline, it will exhibit viscosity, and when the viscosity is too high, it will generate significant internal friction, causing the oil to heat up and increasing the resistance to oil flow. When the viscosity is too low, it is easy to cause leakage, which will reduce the system's volumetric efficiency. Therefore, it is generally recommended to choose oil with suitable viscosity and good viscosity temperature characteristics. In addition, when the oil flows in the pipeline, there are also pressure losses along the way and local pressure losses. Therefore, when designing the pipeline, try to shorten the pipeline as much as possible and reduce bends.

Firstly, before repairing the hydraulic motor, it is necessary to conduct fault diagnosis, especially for the valve body that has the characteristic of isothermal compression and is prone to suction and compression of flammable and explosive gases. The four installation screw holes of the valve body should be marked and drilled with threaded bottom holes, and the drilling template should be used to locate these four holes before drilling through the oil hole. This processing program can ensure accurate alignment with the center distance 'X' of the oil passage of the valve body, and even when the oil temperature rises to 60 ℃, there will be no oil leakage.
We can adopt corresponding maintenance methods to address common causes of malfunctions. When repairing or replacing components, it is necessary to select parts that meet the requirements and ensure that their quality and specifications are the same as the original. When disassembling, cleaning, or replacing components, the correct steps should be followed to avoid affecting other components.
Improper assembly can easily cause damage due to the high-speed operation of the high-pressure pump during operation. The type of each pump must be considered as the selection of lubricant on a case by case basis. This fault can be eliminated by removing the burrs that have not been cleaned, cleaning each component, and replacing the sealing components; Some serious cases may cause "cylinder pulling", which makes troubleshooting more complicated; More serious cases may lead to cylinder barrel scrapping
Diaphragm pumps may experience common malfunctions during long-term operation, such as pump leakage, pump failure or difficulty in starting, high pump operating noise, and unstable pump flow. To address these issues, we can take appropriate maintenance and replacement measures by checking the condition of components such as the diaphragm, pump body, and motor to ensure the normal operation and functioning of the diaphragm pump. At the same time, in daily use, paying attention to regular inspection and maintenance of diaphragm pumps, strengthening maintenance, is also an important measure to prevent failures. Through proper use and maintenance, diaphragm pumps can continuously and stably perform their functions of liquid transportation and pumping.
Use two cold drawn pipes (slightly longer than the actual size), first align the "welded pipe joint" with one end of the two steel pipes and blanch them firmly;
It will reduce the density of the ring and enrich more micropores, low melting point impurities, gases, and non-metallic inclusions inside It, like strip carbides, plays a role in dividing the continuity of the matrix, causing component segregation and matrix brittleness, greatly reducing the comprehensive mechanical properties of the ring. Moreover, it increases friction resistance and notch sensitivity during grinding, promoting high concentration of grinding stress and easily inducing grinding cracks. They use professional tools to tighten the screws, inspect each connection, and then seal and tighten them with appropriate methods and tools
In terms of flow pulsation rate, the double acting high-pressure pump has a smaller flow pulsation rate, followed by the plunger pump, while the single acting high-pressure pump and plunger pump have a moderate flow pulsation rate
Supplement connection key: The missing connection key can cause unstable operation of the high-pressure pump. In the system, coarse and fine filters should be configured as needed, and the filters should be checked, cleaned, and replaced regularly. The adjustment of pressure components generally starts with adjusting the system pressure valve - relief valve, starting from zero pressure and gradually increasing it to the specified pressure value; Then adjust the pressure valves of each circuit in sequence. The adjustment pressure of the safety relief valve of the high-pressure pump in the main oil circuit is generally greater than 10% -25% of the required working pressure of the actuator. The pressure valve of the high-pressure pump for sports generally adjusts the pressure by 10% to 20% higher than the required pressure. If unloading pressure is used to supply oil and lubrication oil, the pressure should be maintained within the range of 0.3-0.6MPA. The adjustment pressure of the pressure relay should generally be 0.3-0.5MPA lower than the oil supply pressure.
Due to the small or no clearance between the coupling and the shaft, the bearing may be damaged when struck forcefully, resulting in early damage to the bearing and affecting the life of the entire pump core. Furthermore, if there is no certain axial clearance during the installation of the coupling, directly installing the pump onto the pump sleeve with screws will cause axial force on the bearing. If the bearing is subjected to axial force for a long time, it will quickly damage and produce eccentricity, which will affect the pump core. On the surface, it may seem that the pump core has malfunctioned, but in fact, the culprit is the bearing. If the coaxiality exceeds the specified value during installation, it will cause eccentricity of the bearings and the entire pump core, leading to early damage. The shaft will also be cut off (at the thicker part of the shaft head), and the coaxiality is generally controlled at ≤ 0.1 millimeters. After embedding, the inner cavity should be coated to the required size, and the lining on the protruding end face should be ground off to make it flush with the joint surface of the pump casing. There are several ways of contamination in the hydraulic medium, such as suspension, free and dissolved

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