Maintenance and repair methods for screw vacuum pumps in Shengang Precision Machinery

Liquid viscosity: The flow velocity of viscous liquids (such as honey) is slower than non viscous liquids (such as water) because moving viscous liquids requires more energy. Pipe size: The larger the pipe diameter, the higher the flow velocity, because when the pipe diameter is larger, the flow resistance is smaller. Pipe length: The shorter the pipe length, the higher the flow velocity
Maintenance and repair methods for screw vacuum pumps in Shengang Precision MachineryThe vacuum pump models we can repair include EDS-300, EDS-200, and EOSi series EOS1900i、EOS1600i、EOS1300i、
EOS900i, EOS730i, EOS585i, EOS350i, EDC series, SV10B, SV16B, SV25B, SV40B, SV65B, SV100, SV100A, SV200, and so on, are all repairable.

Due to the different arrangement of valve cones, it opens valve B when the valve stem moves downwards. In addition, the regulating oil passes through a cooler and filter similar to the path of the shaft seal. Since the oil is not extracted from this sealed oil tank, the float valve of the sealed oil tank will not open, and the discharged oil will flow to the storage tank, which is where it further flows into the central turbine oil tank
The following will discuss in detail the specific interactions that lead to group inversion in these different vacuum pump media, providing representative performance level graphs and group inversion processes for each type of vacuum pump. Vacuum pumps occur in various media, and their output characteristics have a greater degree of variation. A book that includes all commercial systems as well as systems specifically designed for the target application can easily fill the entire book. In this section, the focus will be on common commercial vacuum pumps. Table 1 provides the names of these systems (based on their media) as well as their nominal characteristics and parameters. This table can be used as a reference for the subsequent discussion of various vacuum pump grades. Vacuum pumps are used in various application fields of industrial automation. The diversity of application fields requires the demand for different types of vacuum pumps. There are applications for detection, measurement, or positioning. The common feature of different vacuum pumps is the advantage provided by using a vacuum pump. One advantage is high light intensity, which can be measured, located, or detected very easily (as low as nanometers).

In addition, it is recommended that you quickly inspect the pump and consult a pump expert if necessary when observing any symptoms of pump failure. Engineers usually remain conservative when specifying pumps, and they typically include a safety margin in terms of the load of the provided pump compared to application requirements. It is well documented that rotary power pumps (such as vacuum pumps) account for approximately 80% of all installed pumps

Maintenance and repair methods for screw vacuum pumps in Shengang Precision Machinery
The reason why the vacuum pump cannot start normally
1. Power supply issues: Failure to connect the power supply, low or high voltage, blown fuses, damaged power switches, etc. can all prevent the vacuum pump from obtaining the necessary power to start. For example, a low voltage may result in insufficient motor torque, preventing the pump body from operating.
2. Motor failure: Short circuit, open circuit, grounding of motor winding, or damage or jamming of motor bearings can all hinder motor starting. For example, poor lubrication of motor bearings and increased friction make it difficult for the motor to start.
3. Pump body blockage: Foreign objects entering the pump, insufficient clearance between the rotor and stator, and wear and deformation of components can cause the pump body to get stuck and unable to start normally. Just like gears getting stuck with debris, they cannot rotate smoothly.
4. Control system failure: Control circuit failure, damaged start button, contactor or relay failure, etc., can cause control signals to not be transmitted properly, making the vacuum pump unable to start.

If they become too hot, it may damage the pump or pose a fire hazard. In addition, check the working temperature of the pump. 14. Detect abnormal behavior: When the pump is running, pay attention to any abnormal behavior in the pump or surrounding area. If there is a problem, turn off the power and investigate immediately. 15. Do not move the pump: Do not attempt to move or adjust the pump while it is running
The hydraulic unbalanced impeller generates axial thrust proportional to the pressure difference. For a simplified representation of this effect, please refer to Figure 3. When the flow rate decreases, the differential pressure head will be higher, and the axial thrust generated will also increase. In multi-stage pumps, this thrust is usually handled by automatic compensating balancing devices or by directing the impeller towards the opposite end of the pump. Single stage pumps with hydraulic unbalanced impellers will experience higher axial thrust at low flow rates, and multi-stage pumps without balancing devices are no exception; For example, a vertical turbo pump. The design of hydraulic scales is theoretically unaffected. However, an unpredictable aspect is the axial shuttle problem, which may sometimes occur due to recirculation and flow reversal at low flow rates. Significant axial shuttle not only increases the load on the thrust bearing, but also damages the reliability of the mechanical seal. All flow channel geometries in radial thrust volute pumps are designed for BEP velocity. When the pump operates far away from BEP, the speed curve will be distorted.

Using conductivity as a trapping method, a magnetic field generates a cluster of electropositive ions that deposit on the titanium cathode. During this process, the chemically active material combines with gas molecules, drawing them in and creating a vacuum. The delivery pump can operate using two types of methods; Kinetic energy or positive displacement, unlike capture pumps, transport pumps push gas molecules out of space through the system

If set too high, it may cause your pump to overheat, so you should reset the thermostat. 2. Clean the filter: Dirty filters can also cause the pump to overheat, so be sure to clean or replace the filter as needed. Many pump manufacturers provide tables for cleaning or replacing filters. 3. Check the cooling system: Another possible cause of overheating is a problem with the cooling system

Maintenance and repair methods for screw vacuum pumps in Shengang Precision Machinery
Basic steps for repairing vacuum pump that cannot start normally
1. Check the power supply and circuit: Use a multimeter to check if the power supply is powered on, and check if the fuse is blown. If it is blown, it should be replaced in a timely manner. Check if the circuit connections are normal and ensure that there are no short circuits or open circuits. If the power supply is out of phase, maintenance should be carried out to ensure the balance of the three-phase power supply.
2. Check the motor status: Adjust the overload protection setting of the motor starter to match the setting data on the motor nameplate. Check if the motor bearings are worn and replace them if necessary. If the motor coil burns out, the motor needs to be repaired and the secondary coil needs to be rewound. Manually rotate the motor. If it cannot be moved by hand, the motor needs to be disassembled from the vacuum pump and checked separately for the motor and vacuum pump.
3. Check the vacuum pump body: If the vacuum pump has returned oil or the chamber is filled with vacuum pump oil, you can manually rotate the pulley several times to discharge excess oil. If the oil has deteriorated, it should be replaced with new vacuum pump oil in a timely manner. Clean the foreign objects in the pump chamber to ensure that the pump chamber is clean and unobstructed.


The idea of detecting vacuum leaks by spraying them on and around a running engine is that if there is a leak, highly flammable chemicals will be drawn into the engine and burned as fuel, causing an increase in RPM and indicating the leak. For obvious reasons, this is very dangerous and should be avoided
To prevent it from standing still for too long and component separation. By installing a timer, not only can it reduce the cost of someone walking to and operating the pump, but it also eliminates the opportunity for someone to forget and not complete it. The pump responsible for measuring or transporting a specific volume of fluid can be equipped with a batch processing instrument, and once the quantity is reached, the flow meter can shut down the pump. This not only reduces reliance on operators, but also ensures accurate quantities and ease of repetition. Batch meter is an ideal choice for container filling applications and adding a certain amount of fluid/component to a mixture. The stroke counter is similar in principle to a batch processing instrument for pneumatic pumps. It calculates the discharge of air from the pump and shuts it off after execution. By understanding the amount of fluid delivered during each stroke, you can use it for batching. However, it should be noted that if the viscosity of the fluid can vary, it will be inaccurate. The liquid level switch can also control the start/stop cycle of the pump. When the fluid in the container reaches a certain level.

Repair and replacement, for smaller projects, may involve sending the pump back to the manufacturer. Considering this, the following are common signs of vacuum pump failure: increased noise, when your vacuum pump exhibits loud or atypical noise, it may be close to failure, and aging and accumulated wear throughout use can cause specific components in the pump to malfunction

They may cause vacuum leaks. In addition, some old cars have vacuum operated actuators used for air conditioning, heating, and even door locks, which may leak and cause problems. Gaskets and seals leak: Your engine uses multiple gaskets and seals to contain things such as engine oil and coolant, but these gaskets and seals are also used to manufacture airtight seals for components such as intake manifolds and throttle bodies
Weakening the metal, increasing flow resistance, and reducing pumping efficiency, the impact load generated by cavitation will also reduce the service life of the shaft and motor. Cavitation and related problems caused by it will greatly affect the service life of the pump, reducing it by 10-15 years, and in some cases even more. It is easy to avoid cavitation during the design phase
XBJbzaq5xnk6AKXxn