SU1217775A2 - Aerodynamic retarder of winches - Google Patents

Description

one

The aerodynamic retarder is mounted on a winch and is designed to maintain the specified kinematic parameters during the operation of overhead cable installations and roads in descent mode.

The purpose of the invention is to provide automatic control of the retarder's braking torque depending on the rotational speed.

On .fig. 1 shows schematically an aerodynamic retarder; FIG. 2 is a view A-A in FIG. one; in fig. 3 shows a section BB in FIG. 2

The aerodynamic retarder (Fig. 1) consists of a carrier disc I with blades 2 perpendicular to it in a radial position. The carrier disc is attached to the housing 3 of the centrifugal friction clutch which is mounted on the horizontal shaft 4 on two bearings 5 and can freely rotate when the fixed shaft 4. On the shaft 4, mounted on two bearing supports 6, the gear 7 is rigidly fixed, which has brackets 8 on itself, on which the leads 9, which are terminated with loads 10, frictionally in contact with each definiteness rpm with the housing 3, and v-tightening np / I zhinoy 1.

The gear 7 is engaged with the drive gear 12, rigidly attached to the flange of the drum 13 rotating on the axis 14. The internal cavity of the gear 12 serves to set the stop brake 15, and the drum receives rotation from the gravitationally moving carriage with a load through the traction cable 16.

On the disk 1 (Fig. 2 and 3), by means of bolts, for example, 17, the guides 18 of the blades 2 are fixed radially on both sides of it, and each blade is provided with a base with which it is held in the guides. To regulate the amount of movement of the blades in the radial direction under the action of centrifugal force. When the retarder rotates, there are springs 19 fixed to each paddle 2 and the retractor housing 3.

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To limit the movement of the blades under the action of centrifugal forces and springs when changing the rotational speed of the retarder, limiters 20 of the blades 2 and limiters 21 on the supporting disk 1 are used.

The drum 13, having received rotation from the pull rope 16, transfers gear to gear 12 via gear 12.

0 7 and attached to it the elements of the friction clutch: the brackets 8, the leads 9 with weights 10 and the spring 11. At low speeds of the gear 7, the maximum of which

15 is determined by calculation, rotation is no longer transmitted, and the aerodynamic retarder remains stationary. Upon reaching the required (estimated) speed of the gear 20 or 7, the cargo 10, overcoming the resistance of the spring 11, under the action of centrifugal forces, disperses until it touches the casing 3 of the centrifugal friction clutch and transfers the rotation to it and the supporting blade 1 fixed on it with blades 2. rotation of the aerodynamic retarder consumes a certain energy, braking occurs

30 and slowing the carriage movement with the load.

When the predetermined rotation frequency is exceeded, the retarder corresponding to the parameters of the load descent on average slopes, i.e. when the cable installation operates on a maximum slope or with a full load, under the action of the centrifugal force of the blades

Q 2, they move from the rotation radius D1 / 2 to the radius 152/2 and the springs expand 19. In this case, the retarder's braking torque increases to a value equal to the maximum torque developed on the shaft 4 by the drop load, and the speed of the load is reversed: the rotation frequency of the decelerator decreases, the centrifugal forces of the blades 2 decrease, and under the action of the springs 19 they return from the radius of rotation D2 / 2 to the radius of rotation 1) 1/2. In this way, the retarder's braking torque is automatically adjusted and maintained. set the speed of descent. With a further decrease in speed31217775

these descent, i.e. when reducing the dit loads 10 from the housing 3 and so

the number of revolutions of the gear 7 to the calculated value, the spring 11 deflects A

way off aerodynamic retarder from the gear.

20

Editor A.Dolinich

Compiled by A. Bondarenko Tehred S. Migunova

1070/26

Tirizh 800. Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Branch ShSh Patent, Uzhgorod, st. Project, 4

Proofreader E. Sirohman

Claims (1)

AERODYNAMIC SLOWER OF WINES by ed. No. 398502, characterized in that, in order to ensure automatic regulation of the braking moment of the moderator depending on the rotational speed, the blades on the carrier disk are made with the possibility of radial movement in the guides and are equipped with limiters and springs restricting the movement of the blades within the specified limits.