BG610Y1 - Centrigugal ball connector - Google Patents

Abstract

The connector is used in the mining and the metallurgical industries for driving of machines having considerable inertia mass and/or large initial resistive moments of resistance. It has a simplified and light-weight design which reduces the wearing of the internal surfaces on which the balls run, The connector comprises a guiding (2) and a guided (1) section, including an external housing (3) having covers (5 and 6) fitted to it, and closely inserted an internal bushing (9) in it, on the inner surface (11) of which ring-shaped grooves (12) are machined. The guiding section (2) comprises a driving rotor (13), made of a hub (15) and working blades (16), fitted to hub (15), the space formed between it, the blades and the internal surface (11) of bushing (9) is divided into six chambers (18). They house an equal number of working medium (bodies) (19), fitted in the form of a tetrahedron in the ring-shaped grooves (12) of toroidal surface. The number of grooves (12) is determined by the mathematical relation wherein La is the active width of the connector (mm), and Rc is the radius of the balls (mm). 6 claims, 4 figures

Description

Technical field

A useful model relates to a centrifugal ball clutch, which is used to drive machines with significant inertial masses and / or large initial static resistance moments, in particular in the mining and metallurgical industries.

BACKGROUND OF THE INVENTION

A centrifugal shotgun (ball) starting-protection clutch is known, consisting of a guide and guide section composed of an outer housing, with side flaps, on which the outer surface is ribbed and the removable sleeve is inserted into its inner surface. The leading section consists of a drive rotor with blades, forming chambers, in which is placed a crumb filler. The outer housing is mounted on the rotor hub and the rotor is connected to the drive shaft. The housing is connected via easily melting pins to a ring that is secured to an elastic semi-clutch connected to the drive shaft (1).

The technical nature of the utility model

The centrifugal ball coupling includes a guide section, concentrically enclosed by a conductive section, which consists of an outer housing with a ribbed outer surface with side flaps that encloses an inner sleeve. The guide section is composed of a drive rotor with blades, and identical chambers are formed between the outer surface of the rotor hub and the work blades, in which working bodies (ball stuffing) are arranged, which are the same as balls. An outer housing is mounted on the rotor hub. According to a useful model, annular grooves with a toroidal surface are formed on the inner surface of the inner sleeve. The formed chambers are at least two and the working bodies placed in each chamber are arranged in annular grooves in the form of a tetrahedron, the number of which is determined by the following mathematical dependence:

in which Nk denotes the number of annular grooves in the connector;

La - active (working width) of the clutch in mm;

Rc - radius of the shot in mm.

The technical nature of the utility model is also explained by another embodiment wherein the outer housing and the inner sleeve are formed into one body such that the inner surface of that body contains annular grooves.

In another embodiment, one of the side covers contains a transverse aperture in which a closure plug is provided, and an additional number of shotguns may be inserted through the opening.

In a further embodiment, the distance between the centers of the annular grooves is equal to the product V3 along the radius Rc of the shotgun, and the depth Hk of the groove is equal to 0.3 of the radius Rc of the shotgun.

In another embodiment, the radius Rk of the closed curve that forms the annular channel is expressed by the dependence:

Rk - (1.01-1.10) Rc

In a non-lasting variant, the volume Vc of the working bodies (ball-filling) in each chamber obtained from the sum of the volumes of each shot and the volume Vk of one chamber is expressed in the following relation:

Vc ------ 0.3-0.5 Vk

The advantages of the utility model are that it reduces the wear on the inner surfaces of the ball, due to the reduction of lateral friction due to the toroidal surface of the annular grooves; maximum output torque is transmitted due to the created maximum density of the shotguns located in the cameras due to their tetrahedron arrangement and the optimal combination of shotgun parameters located in the channels and the dependencies between the radius of the shotguns and the distance between the centers of the channels , their length, as well as the ratio between the volumes of the shotgun and the chamber in which these shotguns are placed.

In addition, the service life of the clutch is extended due to a decrease in contact pressure due to the relationship between the annulus of the annular groove and the radius of the ball.

Description of the attached figures

Figure 1 shows a longitudinal section of a centrifugal ball coupling;

FIG. 2 is a section through AA of FIG. 1;

Figure 3 is a partial axonometric view of the annular grooves;

FIG. 4 is a partial view and a partial section in the range between two cameras having one shot.

Examples of implementation of the utility model

The centrifugal ball coupling consists of a guide 1 and a leading 2 section. The guide section 1 comprises an outer housing 3 with a ribbed outer surface 4, to which a right side cover 5 and a left side cover 6 are secured, in which a transverse through hole 7 is formed with a sealing plug 8 seated therein. an inner sleeve 9 that rests tightly against its two ends in the peripheral concave portion 10 of the side covers 5 and 6 so that the inner sleeve 9 is fixed. In the inner surface 11 of the inner sleeve 9, annular grooves 12 are formed. The guide section 2 consists of a drive rotor 13, supported to the side covers 5 and 6 by means of rolling bearings 14, and is formed by a hub 15 and six-piece work blades 16. and are symmetrically arranged thereon, fixed fixed by welding into grooves (beds) formed in the hub 15. The space formed by the working blades 16, the outer surface 17 and the hub 15 and the inner surface 11 of the inner sleeve 9 is divided into seven pieces one aquis by volume chambers 18, which accommodate an equal number of working bodies 19 (ball stuffing), constructed as pellets, mounted in annular grooves 12 with a toroidal surface, the pellets 19 being dynamically positioned in the form of a tetrahedron.

The maximum density of the shotgun (total shot) 19 is achieved when the radius Rk of the closed curve contouring the annular groove 12 is equal to 1.01 from the radius Rc of the shotgun 19. The distance Lk between the centers of the annular grooves 12 is, is equal to V3 along the radius Rc of the shotgun 19, and the depth Hk of the annular groove 12 is equal to 0.3 of the radius Rc of the shotgun 19.

The number N of the annular channels is determined by the following mathematical dependence:

La means active connector width, in mm;

Rc - radius of the shot, in mm.

The ratio of the volume Vc of the shotgun (working bodies) 19 in each chamber 18 obtained from the sum of the volumes of each shot and the volume Vk of one chamber 18 is expressed by the following relation:

Vc --0.3

Vk

Using the utility model

The centrifugal ball clutch is operated as follows. After mounting the clutch and filling the chambers 18 with the workpieces 19 through the keyway 21 formed in the hub 15 and the key not shown in the figure, the clutch is connected to an asynchronous motor with a short-circuited rotor (not shown in the drawing). When the engine is started, the rotor 13 is rotated through a keyed coupling which transmits the torque from the drive section 2 to the drive section 1 of the clutch. This is done when all the shotguns 19, which are housed in the respective chambers 18, begin to move, making a vortex motion, while positioning themselves as tetrahedron. From this point, the ball-filler (ball-type working bodies) acts as a coupling element, since they are pressed tightly together and form a rigid connection, so that the transfer of the centrifugal and friction torque forces from the leading 2 to the water Section 1 is implemented by the action of the centrifugal and friction forces acting on the ball filling 19.

In each chamber 18 are placed 100 pieces of ball, which provide optimal conditions for the normal flow of the trigger process of the clutch. When it is necessary to increase the torque, this is done by increasing the number of shots 19 in each chamber 18, but the total quantity must not be more than 160 pieces in one chamber, a necessary condition for the engines currently used.

The insertion of the shotguns 19 can be accomplished after the closure plug 8 is released from the aperture 7 and the required number of shotguns is inserted through it, rotating the drive rotor 13 by hand until access is made to each chamber 18. The operation can also be done by removing the side cover. It is necessary to add exactly the same number of shotguns 19 in all chambers 18 when adding or replacing the ball stuffing.

Claims (6)

Claims 1. A centrifugal ball coupling comprising a guide section concentrically enclosed by a conductive section composed of an outer housing with a ribbed outer surface and left and right side flaps that encloses an inner sleeve, the guide section comprising a drive rotor, and between the blades them and the outer surface of the hub are formed identical chambers, in which is placed a ball filling of the same ball, with the hub of the drive rotor bearing an outer housing, characterized in that on the inner surface (11) inwards the sash (9) enclosed by the outer housing (3) is formed by annular grooves (12) with a toroidal surface, and the working bodies (19) housed in each of the chambers (18) are located in the annular grooves (12), in a type of tetrahedron whose number is determined by the following mathematical dependence: Nk La - 2Rc RcVT in which Nk denotes the number of annular grooves in the connector; La - active (working) clutch width, in mm; 10 Rc - radius of the shot, in mm. Connector according to claim 1, characterized in that the outer housing (3) and the inner sleeve (9) are formed into one body. The connector according to claim 1, 15, characterized in that the left side cover (6) contains a transverse through hole (7) in which a closure plug (8) is housed. Coupler according to claim 1, characterized in that the distance Lk between the centers of the annular grooves (12) is equal to the product VT along the radius Rc of the shotgun, and the depth Hk of the groove (12) is equal to 0.3 along the radius Rc of the shotgun (19). Connector according to claims 1 and 4, characterized in that the radius Rk of 25 the closed curve that forms the annular channel (12) is expressed with dependence Rk - (1.01 - 1.10) Rc. A connector according to claim 1, 30, characterized in that the volume Vc of the working bodies (19) in each chamber (18) obtained from the sum of the volumes of each shot (19) and the volume Vk of one chamber (18) are expressed in the following relation: