Comparison of the development process of three generations of spool valve vacuum pumps

Comparison of the development process of three generations of spool valve vacuum pumps

The first generation of slide valve vacuum pump: the pump and motor are located on the base, such as: H-8A, H-150, H-7, H-600, H-30, etc.

Main disadvantages: large floor space, compact structure, heavy weight, large volume, large power, high vibration, high noise, thick oil layer on the exhaust valve, and large fuel injection.

Second-generation spool vacuum pump: There is a fuel tank on the upper part of the pump body, and the motor is installed on the fuel tank. Such as: HL-150, H-150E, H-300A, 2H-70A, 2H-30A and so on.

The main disadvantages are: the motor is placed above the fuel tank, the pump has a high center of gravity, the vibration is too large, the pump cover is not interchangeable, and the seal between the pump cover and the pump body is sealed with sealant. It is extremely inconvenient to maintain, the oil layer on the exhaust valve is thick, and the fuel injection amount is Large, vacuum oil is easy to emulsify.

The third generation of slide valve vacuum pump: cancel the fuel tank, exhaust valve cover and other parts, click directly on the pump body, is the latest generation of slide valve pump structure. Such as H-25GK, H-30GK, H-50GK, H-80GK, H-125GK, H-150GK, H-180GK, H-300GK and the like.

Main advantages: 1. The ultimate vacuum is high, comparable to the double-click spool pump.

                              2. The pump has a low center of gravity and low vibration

                              3. Compact and lightweight

                              4. The oil layer on the exhaust valve is thin and the amount of fuel injected

                              5. The “O” ring seal is used between the pump body and the pump cover for easy disassembly and assembly and strong sealing.

                              6. The pump cover is interchangeable and easy to maintain.

                              7. Fuel consumption is greatly reduced