Pressure gauge common failures and repair methods

Pressure gauge is the use of different kinds of deformation of the elastic element under the action of pressure to measure pressure or vacuum. The deformation through the drive mechanism, and finally by the pointer driving instructions. Common faults and adjustable pressure gauge repair method: 1. After pressure is removed, Pointers can't return to zero. 1) Pointer to bending or loose, tweezers correction are available, and after check out. 2) Balance spring torque is insufficient, can release center gear and sector gear meshing, counter clockwise to increase the gyration center gear shaft balance spring torque. 3) Transmission gear with friction. Adjust the gear meshing clearance. 2. Pressure gauge pointer have beats or dull not turning phenomenon. 1) A pointer into the surface of glass or dial with friction. Can rectify pointer, thickening glass washer or pointer shaft hole below ground. 2) Center gear shaft bending, trunnion different heart, don't match, desirable under gear correction with wooden hammer knock straight or to parallel-jaw vice straightening. 3) There is dirt, between the two gear mesh can remove the two gears to clean. 4) Between the connecting rod and sector gear screw loose screws not activities or activities, available file file thin thickness of the connecting rod. 3. Only at a fixed point of 1) Where is found on a scale ultra poor, stop where on a scale. Check the calibration points on each parts with case, drive shaft hole has blocked; Connecting rod is flexible; Teeth meshing point with and without damage, foreign bodies, etc. 2) There was a positive error at some point, often because of teeth meshing points have dirt and burr; More than negative error, due to loss or injury tooth in the shape of teeth. Teeth injury severity, should replace new pieces. No new parts to replace injured center wheel tooth mesh can change position, make the tooth to avoid the transmission. The fan wheel tooth cannot adjust was injured, must be replaced a new parts. Pressure gauge is simple in structure, cold resistant, heat resistant, easy to use, wide measuring range, the characteristic of high accuracy, is widely used in production and living.