How to improve the screw vacuum pump seal performance _

screw vacuum pump itself, low noise, energy saving, has become a machinery manufacturing, automobile and so on one of the important equipment in the field of play a positive role in improving the work efficiency. However, due to many factors, screw vacuum pump seal performance is poorer, directly affect the capacity of the screw vacuum pump. To strengthen the factors of affect the screw vacuum pump seal performance research has positive significance.

screw vacuum pump seal performance fault main reason:

at present, screw vacuum pump use new materials to improve the overall performance of the equipment, prolong the service life of equipment. However, many factors affect overall sealing performance of equipment, mainly manifested in the following aspects:

1. Between the rubber bushing and the rotor pressure

in the process of actual movement, rubber bushing and the rotor in a state of interference, make full use of the interference of contact, can reduce fluid loss. However, when such as internal pressure and the pressure differential between the seal chamber of the factors, the influence of contact pressure to reduce to cause leakage, which reduces the device sealing performance.

2。 Rubber bushing shear stress

under the influence of interference fit, the deformation resistance in the contact stress between the bushing and sealing position, ensure the sealing between two adjacent Chambers. During the period of equipment operation, between the rotor and the hydraulic shear force. Once more than the strength of the rubber materials, rubber bushing is bound to be torn, lead to leakage and difficult to meet the production requirements.

3。 Structural parameters of

fatigue damage is mainly formed under the influence of alternating stress, generally characterized by low stress brittle fracture and local property changes. After long time use, the performance of the rubber material is changed, the leaking problem, difficult to meet the requirements of actual work. Therefore, the device structure directly affect the sealing performance of device.

the effective countermeasures to improve the performance of screw vacuum pump seal:

1. Increasing interference

screw vacuum pump is mainly metal interference interference fit between the rotor and stator rubber bushing size. In the specific work, there must be some interference between stator and rotor, in order to ensure the tightness between a closed chamber. Therefore, the interference between stator and rotor will greatly influence the performance of the equipment. Generally speaking, in the premise of same series, interference directly determines the amount of chamber pressure ability, affect the ability to ascend. According to z * large contact pressure with intraluminal pressure there is a negative correlation between. The interior pressure, the greater the z * contact pressure is smaller. With the increase of interference, the same would increase the pressure in the chamber.

all in all, when the other parameters constant, choose interference big screw pump can improve its overall sealing performance and increase pressure, so as to expand the scope of its use. At the same time, in the process of production, you can also take the initiative to introduce electric screw vacuum pump, difficulty of mechanical manufacturing and production work, to avoid fluid flow screw vacuum pump to reduce its running efficiency.

2。 Choose high hardness materials

hardness is the main influencing factors of material deformation. The elasticity, the greater the corresponding material deformation, the easier. Under normal circumstances, there is no theoretical independence between elastic modulus and hardness. Can be seen from the experimental data, however, with the increase of hardness and elastic modulus increases, the influence on the performance of the screw pump seal should be considered. Impact. For example, the rubber bushing is inversely proportional to the contact pressure and internal pressure. The former larger while the latter is smaller, but the trend is consistent. In addition, the greater the hardness of the rubber bushing, z * the location of the contact pressure curve will gradually increase, and the corresponding sealing performance will be improved. Therefore, the rubber pump stator shall be made of rubber, has the high hardness in order to improve the sealing performance.

3。 Optimize the structural parameters of the screw vacuum pump

screw vacuum pump sealing property of rubber bushing is mainly influenced by structure, resulting in compression deformation and component shape deformation volume, in short, structure internal pressure and differential pressure. Such as the critical contact pressure and seal wall screw vacuum water pump room of pressure changing law is similar to ordinary screw water pump. Usually, in the mechanical analysis of rubber parts, rubber used as incompressible materials to reduce the uncertainty, but even small rubber compression will impact on the overall structure. Therefore, the overall structure of the equipment parameter is bound to have impact on the overall performance of the equipment. Screw pump system can be reasonable optimization to achieve to improve the performance of screw pump seal. Under the background of information age, can adjust the coefficient of research and development for the software, and penetrated into the whole process. At the same time, it also can real-time monitor and control power factors such as parameters and axial force to develop the system. Realized with screw vacuum pump running the actual situation of supervision, and optimize the parameters of the screw vacuum pump used in a variety of parameters, so as to improve the sealing performance of the equipment.

For business owners unsure of how to effectively incorporate new technology into our water pump, life may have just become a little easier.
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