Views: 6 Author: Site Editor Publish Time: 2021-05-09 Origin: Site
Today, the editor of Shandong easttai will explain to you the common faults and maintenance methods of water ring vacuum pumps：
During long-term use, some parts of the water ring vacuum pump will be damaged. When the damage reaches a certain level, there will be screams and vibrations. Wear of motor bearings or shafts is one of the main reasons. The parts of the pump must be inspected and damaged parts replaced. In addition, if there are any parts in the pump cavity, it will scream and vibrate. Solids enter and blockage will also cause this phenomenon. What needs to be done is to remove impurities in the pump cavity.
There are also cases of noise and vibration in the water ring vacuum pump. In other words, when the vacuum is too large, the noise is harsh, so when you hear a harsh sound, it is likely that the vacuum is too large. At this time, you need to open the valve of the vacuum pump and put some air in it. These are brief introductions to the main causes of noise and vibration of water ring vacuum pumps. In order to reduce the possibility of this phenomenon, it is necessary to check all components frequently so that damaged components can be found and repaired in time. Or replace it.
Other possible causes and maintenance plans of water ring vacuum pumps:
1) The influence of the rotating blades on the cylinder, the remaining volume of the pump and the sound of the pressure oil in the exhaust dead zone:
The impact of the rotating blades on the cylinder wall. If improper design, manufacturing or materials are used, the sliding of the rotating blades is not stable, or due to the existence of dead angles in the exhaust, incompressible oil will cause the head of the rotating blades to not always run close to the cylinder wall, resulting in the rotating blades against the cylinder. The impact of the wall. Therefore, a circular arc surface should be used to separate the intake and exhaust ports.
Eliminate the dead seam with the exhaust pipe. When using a threaded separation structure, the distance from the exhaust end to the tangent point should be as short as possible. For rotary pumps lower than 70 liters/sec, considering the actual thickness of the rotary plate, it is recommended to use 7vlom, while large pumps use a larger value. When it is too close, due to the existence of the rotor slot and the narrow band on the rotor head, the sealing effect is not good when the rotor is transferred to the tangent point position, which will affect the pumping speed and even the ultimate pressure of the pump. It can be seen that this structure cannot completely eliminate the exhaust gap and limit the level of noise reduction. It should be pointed out that the gap between the disc and the groove will reduce performance. Therefore, in order to ensure reasonable endurance and shape endurance, pay attention to the thermal expansion of the rotary plate, avoid the drawing of the rotary plate and the groove, pay attention to the cold oil viscosity of the oil, and design enough rotary leaf spring force. By the garden When the arc is separated, the additional eccentricity of the rotor center should not be too large. Otherwise, after passing through the two garden arcs, the rotation will have a tendency to break away from the cylinder wall at the intersection, but it will cause impact noise. Generally, the small water pump can be 0.20~0.25mm, and the large water pump can be increased appropriately. The sound of pressure oil in the exhaust gap and the sound of pressure oil in the residual volume. When the vacuum pump reaches the ultimate pressure, the two pressure oils will be injected into the vacuum chamber at high speed when they are connected to the vacuum chamber, and hit the rotor and cylinder wall to produce sound. The size and location of the two volumes are related to noise.
2) The impact of the exhaust valve plate on the valve seat and support:
The impact noise of the valve seat and the valve plate on the support sucks in a lot of gas, and the pump circulates more oil. The greater the noise of the valve plate, the higher the valve jump, the larger the area of the valve plate and the greater the noise of the valve plate, which has a certain influence on the material of the valve plate. The noise of the rubber valve should be better than the noise of steel plate or laminate. Therefore, in order to control the oil intake, the valve should be closed in a timely and strict manner. Pay attention to the material selection and structure of the valve.
3) Echo and bubble burst in the box:
As echoes and bubble bursts in the water tank increase, this noise will increase. Therefore, when the gas is turned on or through the atmosphere, this noise will increase significantly. If the gas volume is adjustable, the gas ballast can be adjusted reasonably.
4) The noise caused by a large amount of oil and gas hitting the oil baffle:
The noise generated when a large amount of gas and oil is discharged to parts such as oil tanks. If the parts are not strong enough or not fixed, vibration and impact will cause this noise to increase. Therefore, the oil cover must not only have sufficient rigidity and tightness, but also be clamped by rubber to avoid collision noise caused by vibration, and to improve the oil holding effect when it needs to contact other parts (such as the fuel tank).
In addition, if the bearings are worn, it may cause noise from the water ring vacuum pump and noise caused by the transmission.