Edward oil pump

Mechanical installation of Edward oil pump: ⑴ The vacuum pump should be installed in a solid and sturdy place on the ground, with sufficient space around for inspection, maintenance, and upkeep. ⑵ The foundation should be kept level under the vacuum pump base, and it is recommended to use shock-absorbing rubber or bolt casting at the four corners of the base to ensure smooth operation and minimal vibration of the vacuum pump.

　　Edward oil pump

(1) Has a larger pumping speed within a wider pressure range;

(2) The rotor has good geometric symmetry, resulting in low vibration and smooth operation. There are gaps between the rotors and between the rotor and the housing, which do not require lubrication and have low friction loss. This can greatly reduce the driving power and achieve higher speeds;

(3) The pump chamber does not require oil sealing and lubrication, which can reduce the pollution of oil vapor to the vacuum system;

(4) There is no compression in the pump chamber and no exhaust valve. Simple and compact structure, insensitive to dust and water vapor in the extracted gas;

　　Edward oil pumpstructural characteristics

(1) Overall structural type of pump

The arrangement structure of the pump body of a vacuum pump determines the overall structure of the pump.

The horizontal setting of the inlet and outlet of the vertical structure makes assembly and connection of pipelines relatively convenient. But the center of gravity of the pump is relatively high, and its stability is poor during high-speed operation, so this type is mostly used for small pumps.

The inlet of the horizontal pump is on top and the outlet is on the bottom. Sometimes, in order to facilitate the installation and connection of vacuum system pipelines, the exhaust port can be connected horizontally, that is, the inlet and outlet directions are perpendicular to each other. At this point, the exhaust port can open from both left and right directions, except for one end connected to the exhaust pipe, the other end can be blocked or connected to a bypass valve. This pump structure has a low center of gravity and good stability during high-speed operation. This structure is commonly used in large and medium-sized pumps.

The two rotor shafts of the pump are installed perpendicular to the horizontal plane. This structure is easy to control the assembly clearance, the rotor assembly is convenient, and the pump occupies a small area. But the pump has a high center of gravity and the gears are difficult to disassemble, and the lubrication mechanism is relatively complex.

(2) The transmission mode of the pump

The two rotors of a vacuum pump operate in relative synchronization through a pair of high-precision gears. The active shaft is connected to the motor through a coupling. There are mainly two types of transmission structure arrangements: one is to place the motor and gear on the same side of the rotor as shown in the figure. The driven rotor is directly transmitted and driven by the motor end gear, so that the twisting deformation of the active rotor shaft is small, and the gap between the two rotors will not change due to the large twisting deformation of the active shaft, thus making the gap between the rotors uniform during operation. The biggest disadvantage of this transmission method is that: a. there are three bearings on the drive shaft, which increases the difficulty of pump processing and assembly, and the disassembly and adjustment of gears are also inconvenient; b. The overall structure is uneven, and the center of gravity of the pump is biased towards the side of the motor and gearbox.

Edward vacuum pumpCharacteristics of RV8:

(1) Has a larger pumping speed within a wider pressure range;

(2) The rotor has good geometric symmetry, resulting in low vibration and smooth operation. There are gaps between the rotors and between the rotor and the housing, which do not require lubrication and have low friction loss. This can greatly reduce the driving power and achieve higher speeds;

(3) The pump chamber does not require oil sealing and lubrication, which can reduce the pollution of oil vapor to the vacuum system;

(4) There is no compression in the pump chamber and no exhaust valve. Simple and compact structure, insensitive to dust and water vapor in the extracted gas;

(5) Low compression ratio results in poor hydrogen extraction efficiency;

(6) The surface of the rotor is a complex curved cylindrical surface, which is difficult to process and inspect.

(7) The price, operation, and maintenance costs of vacuum pumps.

　　Edward vacuum pump RV8Mechanical installation:

⑴ The vacuum pump should be installed in a solid and sturdy place on the ground, with sufficient space around it for easy inspection, maintenance, and upkeep.

⑵ The foundation should be kept level under the vacuum pump base, and it is recommended to use shock-absorbing rubber or bolt casting at the four corners of the base to ensure smooth operation and minimal vibration of the vacuum pump.

The connecting pipeline between the vacuum pump and the system should be sealed reliably. For small vacuum pumps, metal pipelines can be used to connect the sealing gasket, and oil resistant rubber can be used. For small vacuum pumps, vacuum rubber hoses can be used for connection. The pipeline diameter should not be smaller than the suction diameter of the vacuum pump, and the pipeline should be short and have few bends. (When welding pipelines, welding slag should be removed from the pipeline, and it is strictly prohibited for welding slag to enter the vacuum pump chamber.)

In the connecting pipeline, users can install valves and vacuum gauges above the vacuum pump inlet to check the maximum pressure of the vacuum pump at any time.

(5) Connect the power supply according to the motor label, and install a grounding wire and appropriate specifications of fuses and thermal relays.

When the vacuum pump is powered on for trial operation, the motor belt must be removed to confirm that the vacuum pump rotates in the specified direction before it can be put into use to prevent the vacuum pump from reversing and spraying oil. (Turn in the direction indicated by the protective cover)

For vacuum pumps with cooling water, connect the cooling water according to regulations.

When installing an electromagnetic valve at the vacuum pump port, the valve and the vacuum pump should operate simultaneously.

When the exhaust gas from the vacuum pump affects the working environment, a pipeline can be installed at the exhaust port to divert or an oil mist filter can be installed.