Gravity balancing device and static testing device

The invention provides a gravity balancing device and a static force testing device, which are applied to static force testing of wind driven generator blades, the gravity balancing device comprises a supporting base, a jacking platform and a plurality of jacking rods, the lower ends of the jacking rods are fixedly connected to the supporting base, and the upper ends of the jacking rods can stretch out and draw back relative to the lower ends; the jacking platform is connected to the upper ends of the multiple jacking rods and used for supporting the blades below the blades. Rollers are further arranged on the lower surface of the supporting base, so that the gravity balancing device can move along with the blades along with horizontal bending of the blades. The gravity balancing device can ensure that the test load is not influenced by the gravity load during the static test of the fan blade, and can move along with the movement of the blade, so that the accuracy of the static test is improved. 本发明提供了一种重力平衡装