CN103042076B - Rotating hub type under-pressure balancing device of straightener - Google Patents

Abstract

The invention discloses a rotating hub type under-pressure balancing device of a straightener and solves the problem about poor balancing reliability of existing mechanical balancing device of equipment. The rotating hub type under-pressure balancing device of the straightener is characterized in that a worm gear (10) arranged on a worm gear and worm speed reducer (14) is provided with a through hole (9) with a screw fastener, a hollow screw (8) is screwed in the through hole (9), a tubular hydraulic cylinder seat (15) and a hollow hydraulic cylinder (16) are fixedly arranged on the worm gear and worm speed reducer (14), a hemispherical groove (4) is reserved on the top surface of a rotating hub (2), a cavity boss (7) is arranged in an inner cavity of the rotating hub (2), a balance through hole (3) is reserved between the hemispherical groove (4) and the cavity boss (7), an inverted T-shaped balance shaft (5) sequentially penetrates through the balance through hole (3) and a central hole of the hollow screw (8) from bottom to top to be connected with an output shaft (17) of the hollow hydraulic cylinder (16), and the bottom end of the hollow screw (8) is abutted against the hemispherical groove (4). The rotating hub type under-pressure balancing device is adjustable in balance force and easy to mount and maintain.

Description

Rotary hub type straightening machine pressing down balance device

technical field

The invention relates to a seamless steel pipe production equipment for a metallurgical enterprise, in particular to a pressing balance device on a hub-type straightening machine for producing small-diameter pipes.

Background technique

The steel pipe after hot rolling or heat treatment has a large curvature and cannot be used directly as a finished pipe. In order to meet the use requirements, the steel pipe needs to be straightened on-line or off-line. The rotary hub type straightening machine is a kind of straightening machine. The main components of the main machine are: frame, straightening roller, pressing balance device, pressing balancing device and upper and lower roller adjustment device, etc. The adjustment of the existing straightening roller gap is realized by pressing the balance device. The adjustment of the pressing balance device is completed in the non-straightening state. The pressing balance device is composed of a screw, a screw nut, a rotating hub and its transmission Devices and other components, because there is a thread gap between the screw and the screw nut, the thread gap needs to be eliminated. Usually, the unit uses a mechanical balance device to eliminate the gap, but the reliability of the mechanical balance is not high, and installation, adjustment, and maintenance are inconvenient.

Contents of the invention

The invention provides a rotary hub type straightening machine pressing balance device, which solves the technical problems of low balance reliability and inconvenient installation, adjustment and maintenance existing in the mechanical balance device adopted by the existing equipment.

The present invention solves the above problems through the following solutions:

A rotary hub type straightening machine pressing balance device, including a frame, on which a driving motor and a worm gear reducer are arranged respectively, the worm provided on the worm gear reducer is connected with the output shaft of the driving motor, and the worm gear The worm gear set on the worm reducer is provided with a through hole with a threaded buckle, and the hollow screw is screwed into the through hole. A tubular hydraulic cylinder seat is fixed on the worm gear reducer, and a hollow hydraulic cylinder is arranged on the tubular hydraulic cylinder seat. The output shaft passing through the hollow hydraulic cylinder is output downward to the middle hole of the tubular hydraulic cylinder seat, a hemispherical groove is arranged on the top surface of the rotating hub, and an inner cavity boss is arranged in the inner cavity of the rotating hub. There is a balance through hole between the hemispherical groove and the boss of the inner cavity, and the inverted T-shaped balance shaft passes through the balance through hole and the middle hole of the hollow screw from bottom to top, and then connects with the output shaft of the hollow hydraulic cylinder. The T-shaped platform at the bottom end of the balance shaft is connected together with the bottom end of the inner cavity boss, and the bottom end of the hollow screw rod is connected together with the hemispherical groove.

A straightening roller is fixedly arranged at the bottom end of the rotating hub.

The balance force of the present invention is adjustable, easy to install and repair, and can better eliminate thread gaps. The screw and the rotating hub adopt a separate structure, and the two are in spherical contact to prevent damage to the worm reducer during the adjustment process of the rotating hub.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a schematic diagram of the structure of the present invention cut along the vertical axis direction.

Detailed ways

A kind of rotating hub type straightening machine presses down balance device, comprises frame 13, is respectively provided with drive motor 12 and worm gear reducer 14 on frame 13, and the worm 11 that is set on worm gear reducer 14 and drive motor The output shaft of 12 is connected, the worm gear 10 provided on the worm gear reducer 14 is provided with a through hole 9 with a threaded buckle, the hollow screw 8 is screwed in the through hole 9, and the worm gear reducer 14 is fixedly provided with a tubular The hydraulic cylinder seat 15 is provided with a hollow hydraulic cylinder 16 on the tubular hydraulic cylinder seat 15, and the output shaft 17 passing through the hollow hydraulic cylinder 16 is output downward to the middle hole of the tubular hydraulic cylinder seat 15, on the top surface of the rotating hub 2 A hemispherical groove 4 is arranged on the top, an inner cavity boss 7 is arranged in the inner cavity of the rotating hub 2, and a balance through hole 3 is arranged between the hemispherical groove 4 and the inner cavity boss 7, and an inverted T-shaped balance The shaft 5 passes through the balance through hole 3 and the middle hole of the hollow screw 8 from bottom to top, and then connects with the output shaft 17 of the hollow hydraulic cylinder 16. The bottom end of the hollow screw 8 is connected together with the bottom end of the hollow screw 8 and the hemispherical groove 4 is connected together.

A straightening roller 1 is fixedly arranged at the bottom end of the rotating hub 2 .

The driving motor 12 drives the hollow screw 8 through the worm reducer 14 to drive the rotating hub 2 to move up and down, and at the same time, the inverted T-shaped balance shaft 5 moves up and down to complete the adjustment of the roll gap between the different working positions of the straightening roller 1; 2 The damage to the worm gear reducer 14 during the adjustment process, the hollow screw 8 and the rotating hub 2 adopt a separate structure, and the two are in spherical contact.

Claims (2)

1. A rotary hub-type straightening machine pressing balance device, including a frame (13), on which a drive motor (12) and a worm gear reducer (14) are respectively arranged, and the worm gear reducer The worm (11) set on the machine (14) is connected with the output shaft of the driving motor (12), and the characteristic is that the worm wheel (10) set on the worm gear reducer (14) is set with a threaded through hole (9), the hollow screw (8) is screwed in the through hole (9), the tubular hydraulic cylinder seat (15) is fixed on the worm gear reducer (14), and the tubular hydraulic cylinder seat (15) is provided with The hollow hydraulic cylinder (16), the output shaft (17) of the hollow hydraulic cylinder (16) is output downward to the middle hole of the tubular hydraulic cylinder seat (15), and a hemispherical recess is arranged on the top surface of the rotating hub (2). Groove (4), inner cavity boss (7) is set in the inner cavity of the rotating hub (2), and a balance through hole (3) is set between the hemispherical groove (4) and the inner cavity boss (7) ), the inverted T-shaped balance shaft (5) passes through the balance through hole (3) and the middle hole of the hollow screw rod (8) from bottom to top, and then connects with the output shaft (17) of the hollow hydraulic cylinder (16), in an inverted T shape The T-shaped table (6) at the bottom of the balance shaft (5) is connected to the bottom of the inner cavity boss (7), and the bottom of the hollow screw (8) is connected to the hemispherical groove (4) . 2. The pressing balance device of a rotary hub type straightening machine according to claim 1, characterized in that a straightening roller (1) is fixedly arranged at the bottom of the rotary hub (2).