Combined withCombined with the use of hydraulic seals

     Due to a combination of machine clamping cylinder, cylinder head Seal hydraulic rod seal ring easily damaged, change frequently, poor sealing effect, leakage of hydraulic oil, environmental pollution, high costs. Now through comprehensive analysis and demonstration and field trials, the use of O-type, Y-type hydraulic seal ring combination improved to solve the leakage problem. Clamping pressure is usually required in 3.5 ~ 4.0MPa, the hydraulic system and reversing the impact is relatively large, there is a drawback valley portion cracking Y-type hydraulic seal ring itself. Repeated high-voltage transient tearing under severe stress concentration due to breakdown. In addition, as the hydraulic seal ring itself quality problems, after poor part of the quality of the oil seal hydraulic seal accord, week breakdown, resulting in a large amount of oil.

Many years of experience across the board should be replaced every six months clamping cylinder hydraulic Y-type seal ring, found 4 to 5 hydraulic seal oil seal breakdown. Since the clamping cylinder built into the fixture body, oil leakage outside can not see, only one by one to check the amount of fuel in each case and Dan pipeline leaks of hydraulic station, to determine whether the seal hydraulic cylinder piston rod seal breakdown, every 2 to 3 months across the board found that 2 to 3, the failure rate is high and difficult to handle. Remove the fuel tank drain every rule to tune to open more than one pallet, the push bar to the main belt is withdrawn by one check, the workload is very large, and only to repair a solid clip, need 3 ~ 4h, seriously affecting production tasks complete, you can not stop to repair yield large, so sometimes only allowed to leak.

Analysis of the above problem, consider replacing the other models of hydraulic oil seal ring, V-type multiple sets of hydraulic oil seal ring, too bulky can not adjust the amount of compression in the body, the head added after processing, it will affect the rigidity of the cylinder head portion; Yx hydraulic seals, due to the poor working conditions solid clip about summer hydraulic oil temperature 70 ?, and no suitable size. Therefore inappropriate. It was decided to increase two φ50mmΧ3.5mm O-seal fitting hole in the cylinder head φ45mmΧ25mm rod seal, the original Y-Seal remains unchanged, the formation of a combination seal, so simple improvements, the cost less speed.

With the gap in the cylinder head and the piston rod 0.03 ~ 0.05mm. O-ring seal mounted hydraulic easy extrusion, clamping cylinder working stroke short at 15 ~ 20mm, less seal wear.

(2) the axial length of the aperture, the share of the oil seal axial width 7.3mm, and in the middle of the guide and does not affect the carrying capacity.

(3) based on field experience, a lot of oil cylinder O-ring seals for hydraulic piston rods, cylinder head aperture sliding seals, pressure 3MPa, leakage generally use 2 to 3 years after the emergence of sudden damage minimal.

(4) O and Y-type combination of mutually complementary, hydraulic seal is not easy to suddenly breakdown, easy to wear leakage. Y-leakage is not easy, easy to breakdown. The principle is: Even if the O-ring seal hydraulic after 2 to 3 years of use greater wear, oil pressure P1 through the O-ring hydraulic seal, due to the resistance effect of a pressure drop P2, the hydraulic system of the type Y seal hydraulic seal to greatly reduce the impact of change effect, Y type seal easy breakdown, leakage of hydraulic oil is Y-type seal ring block. Seal persistent strengthening of 4 to 5 times, the elimination of a large number of oil spills caused by the sudden breakdown of the oil seal is possible.

Hydraulic Gasket Selection Tips

(1) selection of hydraulic oil seal ring size φ50mmΧ3.1mm more in line with the requirements, but considering to increase seal life for all, or choose to seal hydraulic φ50mmΧ3.5mm seals to meet the requirements, oil seals have a certain amount of pre-compression, so that you can add all life sealed.

(2) in the wall of the slotted hole φ45Χ25mm cylinder head seal, the groove depth of 2.8 ~ 2.9mm, width of 3.6 ~ 3.7mm. O-Seal compression calculation: On the cross-sectional diameter 3.5 (2.9 0.05) = 0.5 (taken with the gap 0.05mm), in line with the amount of compression of the seal reciprocates the compression rate K value of 10% to 15%.

(3) piston rod end chamfering, easy to damage the seal.

(4) when the seal head assembly should add lubricating oil, with no front repair obtuse angle thread cutter circumferential pressing to successfully enter the piston rod.

(5) test: 0.5MPa low pressure natural movement, high-pressure 6MPa movement without leakage.

(6) Before loading the Y-type seal ring, Y-type seals should be checked for cracks, then gland. the use of hydraulic seals

     Due to a combination of machine clamping cylinder, cylinder head Seal hydraulic rod seal ring easily damaged, change frequently, poor sealing effect, leakage of hydraulic oil, environmental pollution, high costs. Now through comprehensive analysis and demonstration and field trials, the use of O-type, Y-type hydraulic seal ring combination improved to solve the leakage problem. Clamping pressure is usually required in 3.5 ~ 4.0MPa, the hydraulic system and reversing the impact is relatively large, there is a drawback valley portion cracking Y-type hydraulic seal ring itself. Repeated high-voltage transient tearing under severe stress concentration due to breakdown. In addition, as the hydraulic seal ring itself quality problems, after poor part of the quality of the oil seal hydraulic seal accord, week breakdown, resulting in a large amount of oil.

Many years of experience across the board should be replaced every six months clamping cylinder hydraulic Y-type seal ring, found 4 to 5 hydraulic seal oil seal breakdown. Since the clamping cylinder built into the fixture body, oil leakage outside can not see, only one by one to check the amount of fuel in each case and Dan pipeline leaks of hydraulic station, to determine whether the seal hydraulic cylinder piston rod seal breakdown, every 2 to 3 months across the board found that 2 to 3, the failure rate is high and difficult to handle. Remove the fuel tank drain every rule to tune to open more than one pallet, the push bar to the main belt is withdrawn by one check, the workload is very large, and only to repair a solid clip, need 3 ~ 4h, seriously affecting production tasks complete, you can not stop to repair yield large, so sometimes only allowed to leak.

Analysis of the above problem, consider replacing the other models of hydraulic oil seal ring, V-type multiple sets of hydraulic oil seal ring, too bulky can not adjust the amount of compression in the body, the head added after processing, it will affect the rigidity of the cylinder head portion; Yx hydraulic seals, due to the poor working conditions solid clip about summer hydraulic oil temperature 70 ?, and no suitable size. Therefore inappropriate. It was decided to increase two φ50mmΧ3.5mm O-seal fitting hole in the cylinder head φ45mmΧ25mm rod seal, the original Y-Seal remains unchanged, the formation of a combination seal, so simple improvements, the cost less speed.

With the gap in the cylinder head and the piston rod 0.03 ~ 0.05mm. O-ring seal mounted hydraulic easy extrusion, clamping cylinder working stroke short at 15 ~ 20mm, less seal wear.

(2) the axial length of the aperture, the share of the oil seal axial width 7.3mm, and in the middle of the guide and does not affect the carrying capacity.

(3) based on field experience, a lot of oil cylinder O-ring seals for hydraulic piston rods, cylinder head aperture sliding seals, pressure 3MPa, leakage generally use 2 to 3 years after the emergence of sudden damage minimal.

(4) O and Y-type combination of mutually complementary, hydraulic seal is not easy to suddenly breakdown, easy to wear leakage. Y-leakage is not easy, easy to breakdown. The principle is: Even if the O-ring seal hydraulic after 2 to 3 years of use greater wear, oil pressure P1 through the O-ring hydraulic seal, due to the resistance effect of a pressure drop P2, the hydraulic system of the type Y seal hydraulic seal to greatly reduce the impact of change effect, Y type seal easy breakdown, leakage of hydraulic oil is Y-type seal ring block. Seal persistent strengthening of 4 to 5 times, the elimination of a large number of oil spills caused by the sudden breakdown of the oil seal is possible.

Hydraulic Gasket Selection Tips

(1) selection of hydraulic oil seal ring size φ50mmΧ3.1mm more in line with the requirements, but considering to increase seal life for all, or choose to seal hydraulic φ50mmΧ3.5mm seals to meet the requirements, oil seals have a certain amount of pre-compression, so that you can add all life sealed.

(2) in the wall of the slotted hole φ45Χ25mm cylinder head seal, the groove depth of 2.8 ~ 2.9mm, width of 3.6 ~ 3.7mm. O-Seal compression calculation: On the cross-sectional diameter 3.5 (2.9 0.05) = 0.5 (taken with the gap 0.05mm), in line with the amount of compression of the seal reciprocates the compression rate K value of 10% to 15%.

(3) piston rod end chamfering, easy to damage the seal.

(4) when the seal head assembly should add lubricating oil, with no front repair obtuse angle thread cutter circumferential pressing to successfully enter the piston rod.

(5) test: 0.5MPa low pressure natural movement, high-pressure 6MPa movement without leakage.

(6) Before loading the Y-type seal ring, Y-type seals should be checked for cracks, then gland.