German Olmec srl seals, Olmec srl models, Olmec srl prices

Olmec srl seals utilize the "container" concept from transportation to create cartridge seals. The rotating and stationary parts of this seal are pre-assembled into a single unit before installation. After passing inspection and pressure testing, the unit is mounted on the shaft within the stuffing box, fixed to the shaft with set screws, and the gland bolts are tightened. Once the cartridge positioning tabs are removed, the mechanical seal operates with parallel faces and is ready for service. This approach not only simplifies assembly but also ensures assembly quality. Welded metal bellows mechanical seals are all designed as cartridge seals, offering the aforementioned advantages. Cartridge seals are also a type of cartridge mechanical seal. In this design, the stationary ring, rotating ring, sleeve, gland, and auxiliary seals are all assembled together on a sleeve before installation, facilitating inspection of assembly quality. After passing inspection, simply tighten the seal cover and secure the screws. This pre-assembled, inspected, and tested seal component ensures easy installation and high assembly quality.

Olmec srl seal functions

Prevent high-pressure liquid from leaking out of the pump and prevent air from entering the pump. Although the shaft seal occupies a small space in the pump, the normal operation of the pump is closely related to the shaft seal. If the shaft seal is improperly selected, it will not only require frequent maintenance during operation and cause significant leakage of the conveyed liquid, but may also cause fire, explosion, and poisoning accidents due to the leakage of flammable, explosive, and toxic liquids, with unimaginable consequences. Therefore, the shaft seal structure must be reasonably selected to ensure the safe operation of the pump. 1) Since the pressure inside the cylinder is unequal to the external atmospheric pressure, steam inside the cylinder or air outside the cylinder will inevitably leak out or in along the radial gap between the main shaft and the cylinder, causing working fluid loss, worsening the operating environment, and heating the shaft journal or allowing steam to enter the bearing housing, causing oil deterioration. Air leakage also destroys the vacuum, thereby increasing the exhaust load. These factors reduce unit efficiency. Therefore, shaft seals are installed where the rotor passes through both ends of the cylinder. This type of shaft seal is called an end shaft seal, abbreviated as shaft seal. High-pressure shaft seals prevent steam from leaking out of the cylinder, while low-pressure shaft seals prevent air from leaking into the cylinder. 2) During turbine operation, a portion of steam inevitably leaks from the shaft end to the atmosphere, causing loss of working fluid and heat, and also affecting the working environment of the turbogenerator. If adjustment is improper and steam leakage is excessive, it will cause the temperature of bearings near the shaft seal to rise or water to enter the bearing oil. Therefore, shaft seal heaters are installed in various units to recover and utilize the shaft seal leakage steam from the turbine. 3) Prevent steam inside the cylinder and valve stem leakage from escaping outward, polluting the turbine room environment and bearing lubricating oil quality. Prevent high-temperature steam from flowing over the turbine main shaft during normal unit operation, causing it to heat up and resulting in bearing overheating. Prevent air from leaking into the vacuum part of the cylinder. Ensure condenser vacuum effect and degree during unit startup. Recover shaft seal and valve stem leakage to reduce working fluid and energy losses. 4) During turbine tripping shutdown and the entire hot shutdown process where the condenser needs to maintain a vacuum, prevent air from leaking into the turbine, which would accelerate internal cooling of the turbine and cause main shaft bending.

Olmec srl seal replacement steps

1) Remove the main pulley (belt drive) and remove the key pin; 2) Use a pin puller to remove the positioning pins of the shaft seal end cover; 3) Remove the fixing screws of the shaft seal end cover; 4) Use a circular external puller to remove the shaft sleeve (if no puller is available, cut a slot on the shaft sleeve with a cutting machine and knock it off with a chisel; note: use something to block sand to prevent it from getting into the screw threads); 5) Remove the old shaft seal; 6) Clean the end cover shaft seal and bearing positions, then clean with 755; 7) Apply 638 adhesive to the shaft seal installation position, then carefully install the shaft seal; note: do not damage the rubber lip; you can apply a little oil or high-temperature grease to the rubber surface of the shaft seal; 8) After cleaning the shaft sleeve position, reinstall and fix the end cover securely (you can wrap a layer of thick glossy paper around the shaft to prevent the shaft seal lip from accidentally touching the keyway during end cover installation); 9) Clean the new shaft sleeve and installation position, apply fixing adhesive 638 to the inner circle of the shaft sleeve. Cold fit: Use a force rod to evenly knock the shaft sleeve in; place an outer ring of the same size outside the new shaft sleeve to cushion the knocking and avoid damaging the shaft sleeve. Hot fit: Clean the inside of the shaft sleeve thoroughly; there must be no oil. Apply a ring of 638 adhesive to the shaft journal before the shaft seal. Heat the shaft sleeve to 110 degrees and install it. (Note: Push the shaft sleeve to the edge of the shaft seal, pause briefly. Wait for the temperature to drop before pushing it into the shaft seal position; 10) Install the pulley or coupling, correct parallelism or centerline, and manually reverse the machine head to allow lubricating oil to return to the front bearing and shaft seal.

Olmec srl seal precautions

1) Shaft speed: Due to design and structural reasons, high-speed shafts should use high-speed oil seals, and low-speed shafts should use low-speed oil seals. Do not use low-speed oil seals on high-speed shafts, and vice versa. 2) Ambient temperature: In cases of higher operating temperatures, select polyacrylate or silicone, fluorine, or silicone-fluorine rubber. Measures should be taken to lower the oil temperature in the oil tank. In cases of lower operating temperatures, select cold-resistant rubber. (3) Pressure: General oil seals have poor pressure resistance; excessive pressure will deform the oil seal. Under conditions of excessive pressure, use pressure-resistant support rings or reinforced pressure-resistant oil seals. 4) Installation eccentricity: If the eccentricity between the oil seal and the shaft is too large, sealing performance will deteriorate, especially at high shaft speeds. If eccentricity is too large, use oil seals with a "W" shaped cross-section. 5) Shaft surface finish directly affects the service life of the oil seal; i.e., higher shaft finish results in longer oil seal life. 6) Note that there should be a certain amount of lubricating oil at the lip of the oil seal. 7) Pay special attention to preventing dust from entering the oil seal.

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