German heidenhain seals heidenhain models heidenhain prices

heidenhain seals are a common term for general seals, simply referring to lubricating oil seals. They are mechanical components used to seal grease (oil is the most common liquid in transmission systems, and also refers to general liquids). They isolate lubricated parts in the transmission from output parts, preventing lubricating oil leakage. Seals used for static sealing and dynamic sealing (generally reciprocating motion) are called oil seals. The representative form of oil seals is the TC oil seal, which is a double-lip oil seal with a self-tightening spring fully covered by rubber. The term oil seal generally refers to this type of tc skeleton oil seal.

heidenhain seal features

1) No need to measure the seal working length during installation; 2) The shaft can be adjusted at any time; 3) No leakage occurs at startup because the seal has been pre-tested; 4) Installation only requires tightening the seal cover bolts, ensuring easy assembly quality control; 5) Protects the sealing surface from contamination by debris or damage due to operational errors before installation or startup; 6) Can be readjusted after thermal expansion of the machinery; 7) Self-centering through fit; 8) Easy to remove the seal for cleaning and inspection without disassembling the pump equipment. The API682 standard recommends cartridge mechanical seals for all mechanical seals.

heidenhain seal startup preparation

1) Comprehensive inspection of the mechanical seal, as well as the completeness of auxiliary devices and pipeline installation, and compliance with technical requirements. 2) Perform a static pressure test before starting the mechanical seal to check for leaks. If there is significant leakage, identify the cause and eliminate it. If ineffective, disassemble, inspect, and reinstall. The general static pressure test pressure is 2~3 kg/cm². 3) Rotate the pump according to its direction to check for smooth and uniform movement. If rotation is difficult or stuck, check for incorrect assembly dimensions and reasonable installation.

heidenhain seal maintenance

1) Control of shaft seal pressure: High shaft seal pressure can cause steam leakage from the shaft seal, leading to water ingress into the oil and deterioration of turbine oil quality. Excessively high shaft seal pressure will trigger the safety valve of the equalizing tank, wasting working fluid and damaging equipment. Low shaft seal pressure may cause a drop in unit vacuum, allowing cold air to enter the shaft seal or even the cylinder, causing cooling of the shaft seal section or inside the cylinder, seriously threatening equipment safety. 2) Impact of abnormal shaft seal temperature on the unit: When the shaft seal temperature is too high, especially before unit startup, excessive heat can cause intense heating at the shaft end gland and rotor gland sections, leading to local stress concentration and deformation. This may change the gap between the rotor and cylinder, increasing shaft seal steam leakage and differential expansion, potentially causing static-dynamic friction. When the shaft seal temperature is too low, the shaft end gland and rotor gland sections are cooled, also causing local stress concentration, changing the gap between the cylinder and rotor, increasing shaft end leakage, and reducing differential expansion. Low shaft seal temperature may also cause water carryover in the shaft seal supply steam, leading to water hammer in the supply pipeline. In severe cases, this can cause water ingress into the turbine.

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