Therefore, the surface roughness of the sphere is greatly improved. For example, if the material is 1CrlgNi9Ti, turning to the upper limit of the nominal size, the surface roughness Ra is 6.3 m, and the roundness error is 36 pro, the machine speed is 240 r/min, and the honing head speed is 60 m/rain. 180 brown corundum stone. After honing for 2 minutes, the surface roughness R value of the sphere can reach 0.8 m and the roundness error F is 4 m. In order to ensure equal honing effect, it is better to make the honing head or ball rotate reversely for half of the whole honing process. The ball honing device has simple structure and convenient operation. It can hon the ball on a common lathe without special equipment, and is particularly suitable for batch production. If the honing head is replaced, the device can hon the pneumatic ball valve ball with a nominal diameter of 50~150ram. It has obvious technical and economic benefits for improving the finishing efficiency of the sphere, improving the surface roughness and geometric shape accuracy of the sphere.

To eliminate water hammer, water hammer absorber or slow closing check valve must be installed. Only the disc check valve with slow closing function can prevent water hammer. The sealing of ball valves usually uses flexible materials, and it is difficult to use them in high-temperature and high-pressure pipelines. In comparison, the seal of electric butterfly valve is better than that of ball valve. The check valve is characterized by limiting the flow direction of the medium, so that the medium flows in one direction. There are two commonly used types: swing type and lift type.