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 Detail Information Immersible |
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The cable inlet allows no moisture to penetrate into the interior of the motor. The cable is sealed with epoxy resin, the wires are fed into separate guides, which also form the connection to the motor, and, in this way, even the interior space between the cable sheathing and the wires is completely sealed off.
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Separate cable covers permit the simple insertion of a new cable.
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Temperature sensor in the upper bearing (optional).
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Temperature sensor built into the winding.
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High-efficiency motor with dry stator winding, insulated to Class F.
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Oil cooling jacket with forced circulation.
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Re-lubrication facility for the axial bearing.
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Temperature sensor in the lower bearing.
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Float switch for warning of leakage from the upper seal (optional).
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Moisture sensor in sealant oil gives warning of water penetration.
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Oil pump impeller, rigidly mounted on the shaft.
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Tandem mechanical seal in wide oil chamber.
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Sealplate part with cooling ribs serves as a heat exchanger to the transported medium. | | |  | | The HIDROSTAL motor cooling system
The circulation pump in the oil cooling reservoir, which runs synchronously with the motor, guarantees absolute operational reliability.
The process heat is transfered to the transported medium via cooling ribs on the rear of the hydraulic system. Therefore no special cooling channels are necessary for this in the oil chamber. The channels that are common used often become coated with sludge, thereby hindering an efficient heat transfer and leading to undesirable overheating. | | |  | | Moisture Probe
Monitors the condition of the pump side seal by detecting water ingress in the cooling/seal chamber oil. An alarm is triggered when a significant amount of water has entered, indicating that the pump side seal should be repalaced.
Bearing Temperatures
Most Hidrostal motors have an option of monitoring bearing temperature and on large motors thrust bearing temperature sensors are provided as standard.
Float switch (optional)
Detects any water or oil passing through the motor side seal which could cause failure of the lower bearing. This feature is standard on larger motors and an option on smaller versions.
Explosion protection
The motors are approved for use in applications where there is a danger of explosion, according to EExd II B, T3 or T4. Many models are also approved for operation with frequency converters.
Regreasing of Bearings
The lower bearing carries the axial thrust, the weight of the rotating unit and substantial radial loads. To fulfil its L10 design life, periodic regreasing is necessary on certain models. This is easily done by removing a watertight cover which exposes a greasing nipple. The upper bearing carries a lighter load and does not require regreasing between major overhauls.
Tandem Mechanical Seal
Both seals run in an oil bath, which lubricates the pump side seal faces in the event of dry running. The pump side seal has faces of tungston carbide running against silicon carbide, effective for abrasive applications. For heavy-duty application the pumpside seal springs are totally enclosed in a rubber boot or metal body depending on application. Motor side seals are of the open spring type with carbon/ceramic faces.
| | |  | | Construction
For every application area we are able to offer the best motor with the correct characteristics.
Immersible pumps as dry models:
All immersible pumps can, of course, also be operated dry. As a result, a separate motor installation and long propeller shafts become unnecessary. The on-site adaptations are reduced, and the motors run quieter. In case of immersion, they continue to run, and are accessible for service and maintenance.
Immersible motors can be employed in any situation:
• for dry installations
• in immersed areas
• for variable levels
Motors with two speeds
HIDROSTAL has a wide ex-stock range of motors with two speeds. The consulting engineer will select the most suitable motor according to the area of application. | |
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