JPS5844092A - Drive apparatus of centrifugal dehydrator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drive device for a centrifugal dewatering machine, and in particular, a drive unit that rotates a dewatering cage for dewatering is constituted by an axial gap induction motor, and the rotor is provided with a rotor. With the goal.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

In the figure, 1 is the housing of the centrifugal dehydrator, 2 is the dehydration tank, 3 is the dehydration basket arranged in the dehydration tank 2 so that it can rotate freely, 4 is the dehydration shaft, and 6 is the space between the dehydration shaft 4 and the dehydration tank 2. 6 is a sealing member, and 7 is a bearing portion.

M is an axial air gap induction motor with stator 8. It includes a rotor 9 and a motor shaft 1o. The stator 8 is constructed by integrally molding an iron core 8a, a coil 8b, etc. with a resin material such as nonflammable thermosetting polyester.

o-ta91r! The rotor core 9 is formed into a disk forest by die-casting with aluminum material, the upper surface is flat plate-like, and the lower surface has air cooling fins 9b formed on the outer periphery. As an example, a key 1 is machined with a key groove 9c and is attached to a motor shaft 10.
Due to the relationship with 0&, it can slide freely in the 11i1t+ direction,
Moreover, it is constructed so that it is always in the engaged state in the direction of rotation.

11 and 12 are motor bearings provided on the stator 8, which rotatably support the motor shaft 10. 13 is a coupling that connects the motor shaft 1o and the dewatering shaft 4, and 14 (1) is a suspension that elastically supports the drive section.

A brake lining 15 is fixed to the upper surface of the rotor 9 by adhesive or screwing, and the brake plate 16 is fixed so that its sliding surface faces the inner surface of the brake plate 16.

17 is a spring;
The rotor 9 is urged to be separated from the stator 8 via the rotor 9, and an axial force is applied to the rotor 9 so that several brake linings 15 disposed on the rotor 9 come into contact with the opposing brake plates 16.

'19 has no suspension installation, brake plate 16,
The stator 8 and the suspension 14 are screwed and fixed to a support 2o for supporting the suspension 14 via a spring washer 21 for adjusting the gap between the brake lining 16 and the brake plate 16.

Reference numeral 20 denotes a support fixed to the bottom of the housing 1 with screws 23, and the other end of the suspension 14 is fixed to the annular protrusion 2 at the center.
It is screwed onto 2a. Reference numeral 24 denotes a dehydration lid, and when the dehydration lid 24 is opened when the centrifugal dehydrator is energized, a lid switch (not shown) is opened, and the energization to the axial gap induction motor M is turned off. At this time, the rotor 9 moves upward in the figure in the length direction of the motor shaft 1o by the force of the spring 16, and the brake lining 16 comes into contact with the brake plate 16, and the rotating dewatering capacity 3 is braked. After that, the rotation stops.

Conversely, when the axial gap induction motor M is energized, the rotor 9 is connected to the iron core 8a of the stator 8.

The rotor core 9a is attracted by the field force set by the coil 8b, etc., and at the same time, the brake lining 15 separates from the brake plate 16, the braking is released, and the dehydration movement begins. .

67.-m-. Next, the configuration of the brake lining 16 attached to the rotor 9 of the axial gap induction motor M will be explained.

The brake lining 15 is formed into a substantially donut shape. The upper surface of the rotor 9 is formed into a flat shape during molding, and the brake lining 16 is fixed to this upper surface by adhesive, screws, rivets, or the like. It is configured to come into contact with a cap-shaped brake plate 16 with a hole in the center.

In the above configuration, the brake lining 15 is attached to the rotor 9.
By fixing it on the upper surface and forming a plurality of air cooling fins 9b on the back surface thereof, when the rotor 9 rotates 9 times, the rotor 9. Brake lining 15. The air cooling effect on the upper surface of the stator 8 can be actively performed, and abnormal temperature rise of the axial gap induction motor M can be suppressed.1. Additionally, abrasion powder, debris, etc. of the brake lining 16 generated during braking can be removed from the motor, and foreign matter can be prevented from entering the bearing portion of the induction motor M.

61. , □-1 Since the brake lining 15 is air-cooled while the rotor 9 is rotating, the fade phenomenon that tends to occur due to temperature rise during brake braking, that is, generally for light-load brake linings, the temperature is 150'C or more. This can prevent the phenomenon that the friction coefficient decreases and the braking time becomes longer.

Furthermore, the brake plate 16 that the brake lining 15 contacts can be changed depending on the application.

For example, a material suitable for a brake drum material such as Fe12 can be used.

In addition, the rotor 9 is made by winding 5PCC material or the like into a roll to form an iron core, and die-casting an end ring on the outer periphery using aluminum or silumin, etc.
When a brake lining is attached to a brake plate and the brake lining contacts the end ring for braking, if the brake lining comes into contact with the end ring, the brake lining will wear out prematurely due to the so-called galling phenomenon. and lacks durability.

7/- Therefore, the brake lining is configured to contact the rotor core, avoiding the end ring, but in this case, there are dimensional restrictions due to the relationship with the stator core. Become.

However, according to the present invention, by fixing the brake lining to the rotor, it is possible to provide the brake lining at the maximum diameter of the rotor, thereby stabilizing the braking time and increasing the surface area by increasing the brake torque. It is possible to increase the durability time.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of a centrifugal dehydrator according to an embodiment of the present invention when the centrifugal dehydrator is in a braking state, and FIG. 2 is a longitudinal cross-sectional view showing the centrifugal dehydrator in a non-braking state. 3... Dehydration node, M... Axial gap induction motor 1.8... Stator, 9... Rotor, 1o... Motor Shaft, 16... Brake lining, 16... Brake plate, 17
・・・・・・Spring.

Claims (1)

[Claims] The drive unit that rotates the dehydration cage is composed of an axial gap induction motor, and this induction motor has a stator, a motor shaft rotatably supported by a bearing provided on the stator, and a motor shaft that is connected to the motor shaft. a rotor that is slidable in the axial direction and connected in the rotational direction, and a spring is disposed between the stator and the rotor, and when the induction motor is not energized, the rotor is moved by the biasing force of the spring. A drive device for a centrifugal dehydrator, which is configured such that a brake lining attached to the outer surface of the rotor comes into contact with a brake plate attached to the stator while separating from the stator.