RU2215590C2 - Centrifugal separator drive - Google Patents

Abstract

FIELD: equipment for separation of liquid mixtures in field of centrifugal forces. SUBSTANCE: proposed drive has housing inside which vertical shaft of separator drum and high-frequency electric motor are mounted on upper and lower bearing supports. Shaft of electric motor rotor is kinematically linked with shaft of drum. Lower part of this shaft is hollow and is provided with involute splines on inner wall. Splines are located at level of lower bearing support of shaft. Bush secured on shaft of electric motor rotor is provided with involute splines on its external surface. Coupling freely mounted in cavity of drum shaft has two rows of involute splines engageable with splines on internal wall of hollow shaft of drum and with splines on bush of electric motor rotor shaft for connection of these shafts. EFFECT: simplified construction; low cost; increased service life. 2 dwg

Description

 The invention relates to equipment for separating a mixture of two liquids in the field of action of centrifugal forces, and more particularly to drives of centrifugal separators.

 A known drive of a centrifugal separator, including a housing, in the lower part of which is placed a vertically located high-frequency electric motor, on a vertical shaft of which a separator drum is installed (SU 213691, 03/12/1968).

 A spring-loaded clip of the throat support of the drum shaft is installed in the upper part of the electric motor.

 A disadvantage of the known drive is that it uses a specially designed and manufactured electric motor, the shaft of which is designed to fix the drum on it, which complicates the process of balancing the drum. As a result, the cost of the drive increases.

 The closest technical solution to the proposed one is the drive of a centrifugal separator, including a housing mounted inside it in the upper and lower bearings of the bearing, a vertical shaft of the separator drum, a high-frequency electric motor placed vertically in the lower part of the housing, the rotor shaft of which is kinematically connected to the drum shaft through a hydrodynamic coupling (SU 599850 B 04 B 9/08, 03/30/1978).

 The hydrodynamic clutch, located in the drive housing between the shafts of the drum and the rotor of the electric motor, at the time of the start of the separator ensures the separation of these shafts.

 A disadvantage of the known drive is that the installation of a hydrodynamic coupling complicates its design and reduces the reliability due to the presence of its own ball bearings and contact seals for sealing the oil cavity. The dimensions of the drive, its weight and cost are also increasing.

 The technical result of the invention is to simplify the design of the drive, reduce the cost of its manufacture, as well as to increase the service life of the drive.

 To achieve this result, the proposed centrifugal separator drive includes a housing installed inside it in the upper and lower bearing bearings of the vertical shaft of the separator drum, a high-frequency electric motor located in the lower part of the housing, the rotor shaft of which is kinematically connected with the drum shaft.

 The lower part of the separator drum shaft is hollow with involute splines on the inner wall.

 The splines are located at the level of the lower bearing support of this shaft. A sleeve with involute splines on the outer surface is fixed to the rotor shaft of the electric motor, and a coupling sleeve is freely installed in the cavity of the drum shaft, having two rows of involute splines engaged with splines on the inner wall of the hollow drum and with splines on the rotor shaft sleeve of the electric motor to connect these shafts.

 The invention is illustrated by drawings, where in FIG. 1 schematically shows a longitudinal section of the drive of a centrifugal separator, figure 2 - node A of figure 1.

 The centrifugal separator drive includes a housing 1, inside of which a vertical shaft 4 of the drum is mounted on the upper 2 and lower 3 bearings. In the lower part of the housing 1 there is a high-frequency electric motor 5 with a shaft 6 of its rotor. This shaft is kinematically connected with the shaft 4.

 The lower part of the shaft 4 (see figure 2) is hollow with involute splines 7 on the inner wall, and they are located at the level of the lower bearing support 3 of this shaft.

 A sleeve 8 is mounted on the shaft 6 of the rotor of the electric motor 5, which has involute splines 9 on the outer surface.

 Inside the cavity of the shaft 4 and the drum, the coupling 10 is freely installed, having two rows of involute splines engaged with the slots 7 on the inner wall of the hollow shaft of the drum 4 and with the slots 9 on the sleeve 8 connected to the shaft 6 of the rotor of the electric motor 5. The coupling 10 provides permanent connection of shafts 4 and 6.

 The centrifugal separator drive operates as follows.

 When the shaft 6 of the rotor of the electric motor 5 rotates through the intermediate sleeve 8 and the coupling 10, the torque is transmitted to the vertical shaft 4 until it reaches the specified speed, while the speed setting is provided by setting the electronic frequency converter of the power supply current of the electric motor 5, which is included in the electric motor kit.

 When the drive is operating, due to the location of the involute splines 7 of the vertical shaft 4 at the level of the bearing support 3, transmission of loads from the skew of the vertical shaft 4 is excluded, for example, when passing through the critical revolutions of the separator drum during acceleration of the drive, to the coupling 10 and, therefore, to the rotor shaft 6 electric motor 5.

 Thus, the influence of loads from the skew of the vertical shaft 4 of the separator drum on the bearings of its rotor installed inside the electric motor 5 is completely eliminated.

 The free installation of the coupling 10 inside the hollow part of the vertical shaft 4 also eliminates the possibility of transmitting axial loads from the vertical shaft 4 of the drum to the shaft 6 of the rotor of the electric motor 5.

 The proposed drive of the centrifugal separator is structurally simple, which allows to reduce the cost of its manufacture and operation, to increase the life of the electric motor and the drive as a whole.

Claims (1)

 A centrifugal separator drive comprising a housing, a vertical shaft of the separator drum mounted inside it in the upper and lower bearings, and a vertical high-frequency motor vertically placed at the bottom of the housing, the rotor shaft of which is kinematically connected to the drum shaft, characterized in that the lower part of the drum shaft is hollow with involute splines on the inner wall, and the splines are located at the level of the lower bearing support of this shaft, while on the rotor shaft of the electric motor is fixed a joint with involute splines on the outer surface, and a coupling sleeve is freely installed in the cavity of the drum shaft, having two rows of involute splines engaged with splines on the inner wall of the hollow shaft of the drum and with splines on the sleeve of the rotor shaft of the motor for connecting these shafts.

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