With the continuous development of modern industrialization, we use vacuum pumps more and more frequently. Oil return often occurs during use, which has also caused some troubles to our enterprise's development and production. Next, I will analyze the measures to prevent oil return of vacuum pump: 1. The static sealing part of shaft seal shall be firm and replaced in time. 2. Move the oil tank and exhaust valve to the side to reduce the oil level and reduce the amount of oil. 3. The plane of the vacuum pump base shall be flat, and the valve plate shall be elastic. 4. Separate the oil near the exhaust valve from other oil, and the oil level is only slightly higher than the partition wall. 5. Add a pipe into the oil hole so that the oil level is only slightly higher than the oil inlet. 6. The check valve mechanism of the vacuum pump is set to automatically close the oil inlet hole when the pump is stopped. 7. Set the oil pump and auxiliary mechanism to cut off the oil circuit when the pump is stopped. 8. Its pump port is equipped with an inflation valve. For the above small series, we provide measures to prevent the oil return phenomenon of vacuum pump. In the ordinary actual operation and use, doing these work well can effectively avoid the oil return phenomenon and ensure its normal operation. Dry screw vacuum pump for pure vacuum process

At present, the dry vacuum pump is still in its infancy in China, and domestic substitution for import will become a trend in the future. Dry vacuum pump will have a great effect on the yield of the process. It is also a trend for dry pump to replace the existing water pump and oil pump. During the maintenance of the vacuum pump, it is found that the pump is full of water. Under normal circumstances, the pump should be oil. While vacuumizing, the pump also pumps water into the pump, resulting in a large number of oil-water compounds. When the pump is working, the presence of a large amount of water increases the load of the pump, and the pump will have problems in the long run. The vacuum drying oven has requirements for the materials to be dried. One is that it cannot contain a large amount of water, and the other is that it cannot contain organic compounds. They will be pumped into the body while vacuumizing, resulting in a series of adverse reactions and affecting the service life of the pump. If the material contains water or organic solvent, liquid water filter and condenser must be added to play a filtering role. While using the vacuum drying oven, we must also strengthen the maintenance of the vacuum pump, timely change the oil for the vacuum pump and prolong its service life. The 13th Shanghai International Chemical Pump、Valve & Pipeline Fair

Pneumatic diaphragm pump is a new type of conveying machinery, which is a kind of pump in China. Compressed air is used as the power source. It can be used for all kinds of corrosive liquids. The pneumatic diaphragm pump has four materials: engineering plastic, aluminum alloy, stainless steel, cast iron and fluorine lining. No matter what material the pump is made of, the pneumatic diaphragm accessories will be damaged and need to be replaced. What are the pneumatic diaphragm pump accessories and what is the name of the pneumatic diaphragm pump accessories? The following is a detailed description of Longyang pump valve according to the physical drawing of pneumatic diaphragm pump accessories. It can be seen from the above table that the accessories of pneumatic diaphragm pump mainly include: diaphragm, sealing ball, sealing seat, auxiliary shaft sealing ring, auxiliary sliding block, piston, piston sleeve, connecting rod shaft, sliding block, sliding plate, cover plate gasket, O-ring, y-o-ring, butterfly O-ring, etc. Let's see what they look like through the physical drawing of pneumatic diaphragm pump accessories, so as to facilitate our later purchase. Here we recommend you to take a look at the use method of pneumatic diaphragm pump to help the service life of pneumatic diaphragm pump accessories. The above is the detailed description of the accessories name of the pneumatic diaphragm pump and the accessories drawing of the pneumatic diaphragm pump. When the diaphragm pump is used to a certain extent, we need to replace its accessories and vulnerable parts, especially the diaphragm plate needs to be inspected or replaced regularly. The pneumatic diaphragm pump is equipped with 2 F46 diaphragms and 2 mountain rubber diaphragms, which are replaced at the same time, This helps to improve the working efficiency of the diaphragm pump. Roots - Piston Vacuum Pump Package Used In Fruit freeze dryer

Troubleshooting of pump centrifugal impeller and pump mechanical seal 1、 Troubleshooting of centrifugal impeller of water pump Most of the leaves of the centrifugal impeller of the water pump are damaged due to cavitation or suction of solid matter, metal material residue, etc. Sun ring (also known as seal) The wear of the ring is generally caused by the unreasonable movement of the channeling projectile in the installation process, and the loose back cap of the centrifugal impeller will also lead to the wear of the mouth ring Wear and tear. If the mouth ring is seriously worn, the centrifugal impeller needs to be replaced; If the wear of the mouth ring is relatively light, it can be repaired. There are various self suction pumps and sewage pumps using centrifugal impellers. 2、 Fault resolution of balancer If the equalizing disc and equalizing ring are worn too much (generally more than 2mm) or uneven concave convex, weld or grind the concave on the pump body first A 3mm thick Teflon washer is added at the fusion surface between the equalizing ring and the pump body. In that way, the problem after welding repair is solved Uneven surface caused by manual grinding,. The raw material of gasket is hard and soft. If the wear is too much, replace the equalizing ring and equalizing disc with a new one. 3、 Troubleshooting of mechanical seal of water pump The mechanical seal of the water pump has a pair of inner holes vertically bisecting the rotation axis. The inner hole has the effect of liquid working pressure and compensating the external elasticity of mechanical equipment Under this condition, it depends on the coordination of the auxiliary seal to maintain the fit with the other end and slide relatively, so as to avoid liquid leakage. Mechanical seal leakage The percentage of leakage accounts for more than 50% of the leakage of all maintenance pumps. The operation of mechanical seal can directly endanger the normal operation of the pump. The leakage of the mechanical seal will cause the radial movement of the pump motor rotor, the large throwing movement, the expansion of the interference between the auxiliary seal and the shaft, and the moving ring can not work on the shaft Live move. When installing the mechanical seal, the glaze movement of the shaft should be less than 0.5% IMM, the interference between the auxiliary seal and the shaft shall be Moderately, while ensuring the axial seal, it is also necessary to ensure that the moving ring can move flexibly on the shaft after installation (press the moving ring towards the torsion spring) Can bounce back at will). If you want to prevent the inconvenience of replacing mechanical seals, you can choose unsealed pump products, such as magnetic pumps or acid-base resistant magnetic pumps. The central vacuum system is applied to the laminating machine

Vehicle NVH performance mainly refers to the noise, vibration and discomfort directly felt by the drivers and passengers in the vehicle during driving, also known as sound vibration roughness. Vibration and noise are often inseparable and occur at the same time. Excessive vibration will cause damage to the engine and vehicle parts; Noise is generally caused by vibration, which not only pollutes the environment, but also makes drivers and passengers tired; Acoustic vibration roughness refers to the discomfort directly felt by the drivers and passengers by the vibration and noise in the vehicle. The vibration in the vehicle mainly refers to the vibration generated during the operation of the engine and its accessories and power transmission system and the vibration generated by road excitation, which is transmitted to the steering wheel through the tire, suspension and suspension system through the frame and body The floor and seats are perceived by the personnel in the vehicle. The noise in the vehicle mainly comes from two aspects: First, the combustion noise and mechanical noise generated during the operation of the engine and its accessories, the friction noise and wind excitation noise between the tire and the ground during rolling are transmitted to the vehicle through the air medium; The second is the structural noise induced by the vibration generated by the chassis, body and other structural parts due to the excitation of the engine powertrain and uneven road surface. The noise generated during the operation of the brake vacuum pump is directly transmitted by the solid, transmitted to the body through the engine compartment, radiated to the vehicle through the structure, and perceived by the personnel in the vehicle. After stepping on the brake pedal in the state of low-voltage power supply, When the brake vacuum pump starts to work, the working noise generated by the vacuum pump is large, and the inflation noise of the vacuum pump can be clearly heard in the vehicle Vacuum Pump Heat Treatment Guide,Heat Treatment Equipment Liquid Ring Vacuum Pump