WO2021027617A1

WO2021027617A1 - Positive drive self-balancing type flip-flow screen

Info

Publication number: WO2021027617A1
Application number: PCT/CN2020/106723
Authority: WO
Inventors: 刘初升; 李洪喜; 武继达; 杨晓东; 陈杲; 王存款; 何德艺; 郑剑锋
Original assignee: 中国矿业大学
Priority date: 2019-08-14
Filing date: 2020-08-04
Publication date: 2021-02-18
Also published as: AU2020328701B2; CN110465483A; CN110465483B; AU2020328701A1

Abstract

A positive drive self-balancing type flip-flow screen, comprising a fixed screen frame (1), a floating screen frame (2), suspension device assemblies (3), a main rack (5), a motor (7), a petal-shaped coupling (8), and an eccentric shaft assembly (9). The fixed screen frame is mounted on the main rack; two side surfaces of the floating screen frame are connected to the fixed screen frame by means of the suspension device assemblies correspondingly; screen surface crossbeams of the fixed screen frame and screen surface crossbeams of the floating screen frame are arranged alternately; the motor is located on one side of the main rack; the eccentric shaft assembly is fixedly mounted at an upper end portion of the fixed screen frame, and the mounting center plane coincides with the center plane of the floating screen frame; the motor is connected to the eccentric shaft assembly by means of the petal-shaped coupling; the eccentric shaft assembly comprises an eccentric shaft (91), a transmission connection rod (96), and the like; the motor drives the eccentric shaft to rotate, the eccentric shaft drives the transmission connection rod, and thus the transmission connection rod pushes the floating screen frame to do positive reciprocating swing motion relative to the fixed screen frame. The flip-flow screen is simple and reliable in structure, stable in operation, small in noise, high in work efficiency, low in energy consumption, and high in practicability.

Description

Forced-driven self-balancing relaxation screen

Technical field

The invention relates to the technical field of depth screening devices, in particular to a forced-drive self-balancing relaxation screen.

Background technique

Coal is my country's basic energy source and an important industrial raw material, which strongly supports the development of the national economy. Vibrating screening equipment is an important component of coal screening equipment, and its performance is the key to whether coal can be efficiently separated. However, due to coal seam water seepage, dust-proof water spray in the screening process, etc., the raw coal contains a lot of external moisture. Traditional screening equipment has serious hole blocking when processing wet coal materials, and it is difficult to achieve wet fine-grained materials. Effective screening.

The flaccid screen is through the movement of the elastic screen one by one, so that the material continuously contacts the screen surface under the action of the amplitude and elastic force of the screen, bounces loose and falls through the screen, and completes the difficult-to-screen material with high viscosity. Dry efficient screening and high production capacity operations. At present, the flaccid screens used in the market mainly rely on imports, which are expensive, their supporting devices and transmission mechanisms are relatively complicated, and have problems such as high energy consumption and easy damage to key components such as the screen surface.

Summary of the invention

The purpose of the present invention is to provide a forced-drive self-balancing relaxation screen, which has high screening efficiency, large processing capacity, small dynamic load, low power consumption and low noise.

In order to achieve the above objectives, the technical solutions adopted by the present invention are as follows: A forced-drive self-balancing relaxation screen, including a fixed screen frame, a floating screen frame, a main frame, a motor support, and an electric motor. The motor is installed on the main machine through the motor support. On one side of the frame, the fixed screen frame is installed on the main frame through a shock-absorbing rubber pad and forms an angle with the ground. The two sides of the floating screen frame are connected by a suspension device assembly and a fixed screen frame. The fixed screen frame The screen surface beams and the screen surface beams of the floating screen frame are arranged alternately;

The flaccid screen also includes a flap coupling and an eccentric shaft assembly, the eccentric shaft assembly is fixedly installed at the upper end of the fixed screen frame, and the installation center plane of the eccentric shaft assembly coincides with the center plane of the floating screen frame; the eccentric shaft The assembly includes an eccentric shaft, a double row ball bearing, an eccentric shaft support, a transmission connecting rod, a spherical roller bearing, and a linkage shaft. The two ends of the eccentric shaft are respectively mounted on the eccentric shaft support through the double row ball bearings. In the seat, the eccentric shaft support is fixedly installed on the surface of the fixed screen frame, and the eccentric shaft has an eccentric structure at both ends, and includes a middle section and a bearing installation section and an eccentric section symmetrically connected to both ends of the middle section. The eccentric section is also connected to the transition section, and the other eccentric section is connected to the drive section. The drive section is connected to the output end of the motor through the flap coupling. One end of the transmission link is connected to the eccentric section through a spherical roller bearing. The other end of the transmission connecting rod is connected with the floating screen frame through a linkage shaft;

The suspension device assembly includes an upper fixed block and a lower fixed block connected by a screw, the upper fixed block is connected with the fixed screen frame, and the lower fixed block is connected with the floating screen frame,

The suspension device assembly also includes two groups of suspension swinging parts, the suspension swinging parts include a curved convex block and a curved concave block that match the surfaces, and the two groups of suspension swinging parts are respectively fixed on the upper surface of the upper fixed block and the lower fixed block The outer side of the upper and lower arc surface bumps are fastened by a fastening nut.

Further, a sealing ring is arranged between the eccentric shaft support and the eccentric shaft.

Further, the eccentric shaft support is a detachable piece, which is assembled by the support body, the front and rear end covers and bolts.

Further, an oil nozzle is installed on the top of the eccentric shaft support.

Further, the transmission connecting rod is a detachable piece, which is assembled by a connecting rod body, left and right end covers and bolts.

Further, a buffer spring is provided between the fixed screen frame and the floating screen frame.

Further, the flaccid screen also includes an elastic screen surface, the elastic screen surface is composed of a plurality of rectangular screen surfaces connected to each other, the two ends of the rectangular screen surface are respectively fixed on the screen surface adjacent to the fixed screen frame and the floating screen frame On the beam.

Preferably, the elastic screen surface is made of polyurethane material.

Compared with the prior art, the present invention has the following beneficial effects:

1. The fixed screen frame of the present invention is integrated with the main frame, the eccentric shaft assembly is fixedly installed at the upper end of the fixed screen frame, and the installation center plane of the eccentric shaft assembly coincides with the center plane of the floating screen frame, eliminating the floating screen frame operation process The eccentric moment of the inertial force generated in the frame to the frame ensures the stability of the whole machine when working; at the same time, it makes the structure compact, reduces the height of the whole machine, and saves the space for inclined installation.

2. The elastic screen surface is made of polyurethane material. During the vibration process, the fixed screen frame and the floating screen frame move relative to each other, which drives the elastic screen surface to make a flexural movement to achieve material penetration and high screening efficiency.

3. The suspended swinging piece adopts a curved convex block + a curved concave block structure, in which the radius of the convex block is smaller than the radius of the concave block. When the floating screen frame reciprocates, the convex block and the concave block are in line-surface contact. There is rolling contact without sliding friction and no additional energy loss.

4. The motor drives the eccentric shaft to rotate, and the eccentric shaft drives the transmission connecting rod. Through the linkage shaft, the floating screen frame is forced to move back and forth relative to the fixed screen frame. The amplitude is stable and the movement is reliable.

Description of the drawings

Fig. 1 is a schematic diagram of the structure of the forcedly driven self-balancing relaxation screen of the present invention;

Figure 2 is a front view of Figure 1;

Figure 3 is a top view of Figure 1;

Figure 4 is a left side view of Figure 1;

5 is a schematic diagram of the structure of the suspension device assembly of the present invention;

Figure 6 is a partial schematic diagram of the eccentric shaft assembly structure of the present invention;

Fig. 7 is an axonometric diagram of the eccentric shaft assembly structure in Fig. 6;

Figure 8 is a schematic diagram of the eccentric shaft structure of the present invention.

Among them: 1-fixed screen frame, 2-floating screen frame, 3-suspension device assembly, 31-upper fixed block, 32-lower fixed block, 33-fastening nut, 34-curved convex block, 35-curved concave Block, 36-screw, 4- damping rubber pad, 5- main frame, 6-motor bracket, 7-motor, 8-valve coupling, 9-eccentric shaft assembly, 91-eccentric shaft, 92-double row Ball bearing, 93- eccentric shaft support, 95- grease nipple, 96- transmission connecting rod, 97- spherical roller bearing, 98- linkage shaft, 911-middle section, 912-transition section, 913-bearing installation section, 914 -Eccentric section, 915-drive section, 10-buffer spring, 11-elastic screen surface, 12-stud.

detailed description

In order to deepen the understanding of the present invention, the present invention will be further described below with reference to the drawings and embodiments. The embodiments are only used to explain the present invention and do not limit the protection scope of the present invention.

As shown in Fig. 1, Fig. 2, Fig. 3, and Fig. 4, the forced-drive self-balancing relaxation screen of the present invention is mainly composed of a fixed screen frame 1, a floating screen frame 2, a suspension assembly 3, a main frame 5, and a motor support 6. The motor 7, the petal-shaped coupling 8, the eccentric shaft assembly 9, the buffer spring 10, and the elastic screen surface 11; The main frame 5 is fixed on the ground through the damping base, or directly fixed on the ground; The fixed screen frame 1 is fixed on the main frame 5 by a vibration-damping rubber pad 4 and forms an angle with the ground; the two sides of the floating screen frame 2 are connected together by a suspension device assembly 3 and a fixed screen frame 1, and the fixed screen A buffer spring 10 is arranged between the frame 1 and the floating screen frame 2; the screen surface beams of the floating screen frame 2 and the screen surface beams of the fixed screen frame 1 are alternately arranged, and the elastic screen surface 11 is made of polyurethane material. Several rectangular screen surfaces are connected to each other. The two ends of the rectangular screen surface are respectively fixed on the screen surface beams adjacent to the fixed screen frame 1 and the floating screen frame 2. When the two screen frames move relative to each other, the elastic screen surface 11 is driven to relax. Zhang movement; The motor 7 is installed on one side of the main frame 5 through the motor bracket 6, and the motor 7 is connected to the eccentric shaft assembly 9 through a petal-shaped coupling 8.

As shown in Figure 5, the suspension device assembly 3 includes an upper fixed block 31 connected with the fixed screen frame 1, a lower fixed block 32 connected with the floating screen frame 2, and a connection between the upper fixed block 31 and the lower fixed block 32. Screw 36; the suspension device assembly 3 also includes two groups of suspension swinging pieces, the suspension swinging pieces include surface-matched curved convex block 34 and curved concave block 35, the two groups of suspension swinging pieces are respectively fixed on the fixed block On the upper surface and the lower surface of the lower fixed block, the outer sides of the upper and lower arcuate bumps 35 are respectively fastened by a fastening nut 33, that is, the arcuate bump 34 and the surface of the arcuate concave block 35 are fixed on The upper surface of the upper fixing block 31 is fastened by a tightening nut 33 through the screw 36; the curved convex block 34 matches the surface of the curved concave block 35 and is also fixed on the lower surface of the lower fixing block 32, And a fastening nut 33 is passed through the screw 36 to be fastened.

As shown in Figures 6 and 7, the eccentric shaft assembly 9 includes an eccentric shaft 91, a double row ball bearing 92, an eccentric shaft support 93, a transmission link 96, a spherical roller bearing 97 and a linkage shaft 98; Both ends of the eccentric shaft 91 are respectively installed in the eccentric shaft support 93 through the double row ball bearings 92, and a sealing ring is provided between the eccentric shaft support 93 and the eccentric shaft 91; The eccentric shaft support 93 is fixedly installed on the upper end of the fixed screen frame 2 through studs 12 and nuts, and the installation center plane of the eccentric shaft assembly 9 coincides with the center plane of the floating screen frame 2. The eccentric shaft support 93 is detachable It is assembled by the support body, front and rear end covers and bolts. The top of the eccentric shaft support 93 is also equipped with a grease nipple 95 for regularly lubricating the double row ball bearing 92.

As shown in Figure 8, the eccentric shaft 91 has an eccentric structure at both ends, and the eccentric shaft 91 has an eccentric structure at both ends. It includes a middle section 911 and a bearing mounting section 913 symmetrically connected to both ends of the middle section 911 and an eccentric In the section 914, one side of the eccentric section 914 is also connected to the transition section, and the other side of the eccentric section 914 is connected to the driving section 915. The bearing mounting section 913 is installed in the eccentric shaft support 93 through a double row ball bearing 92; one end of the transmission connecting rod 96 is connected to the eccentric section 914 through a spherical roller bearing 97, and the other end of the transmission connecting rod 96 is connected through a linkage shaft 98 is connected to the floating screen frame 2, the transmission connecting rod 96 is a detachable piece, assembled by the connecting rod body, left and right end caps and bolts; the driving section 915 passes through the petal coupling 8 and The output end of the motor 7 is connected; the transition section 914 is used to install a locking ring, and the bearing is axially fixed by the locking ring.

In the above-mentioned embodiment, when the loose screen is working, the motor 7 drives the eccentric shaft 91 to rotate, and the eccentric shaft 91 passes through the bearing mounting section 913, the double row ball bearing 92, the eccentric shaft support 93 and the fixed screen in turn. The frame 1 is connected, and correspondingly, the eccentric shaft 91 drives the transmission connecting rod 96 to move through the eccentric section 914 arranged on both sides and the spherical roller bearing 97 arranged thereon. The transmission connecting rod 96 pushes the floating screen frame 2 to make a forced reciprocating swing motion relative to the fixed screen frame 1 through the linkage shaft 98.

The floating screen frame 2 swings back and forth relative to the fixed screen frame 1 under the pushing of the transmission link 96 and the constraint of the suspension assembly 3. During the swing process, the cambered convex block 34 of the suspension assembly 3 produces relative rolling in the concave surface of the cambered concave block 35. The elastic screen surface 11 is made of polyurethane material. During the working process of the slack screen, the fixed screen frame 1 and the floating screen frame 2 move relative to each other, which drives the elastic screen surface 11 to make a "one piece and one relaxation" flexural movement to realize the material penetration . While meeting the working requirements, the invention not only improves the screening efficiency, but also reduces the friction of the movable parts of the suspension device in the working process, prolongs the service life, and reduces the frictional heating loss. The invention reduces the vibration quality and ensures the stability of the whole machine during operation.

The embodiment of the present invention discloses a preferred embodiment, but it is not limited to this. Those of ordinary skill in the art can easily understand the spirit of the present invention and make different extensions and changes based on the above embodiments. However, as long as they do not depart from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

A forced-driving self-balancing relaxation screen, comprising a fixed screen frame (1), a floating screen frame (2), a main frame (5), a motor support (6), and a motor (7) through which the motor (7) passes The motor bracket (6) is installed on one side of the main frame (5), and is characterized in that the fixed screen frame (1) is installed on the main frame (5) through a vibration damping rubber pad (4) and forms an angle with the ground , The two sides of the floating screen frame (2) are respectively connected by the suspension device assembly (3) and the fixed screen frame (1), and the screen surface beam of the fixed screen frame (1) and the screen surface of the floating screen frame (2) The beams are arranged alternately;

The flaccid screen also includes a flap coupling (8) and an eccentric shaft assembly (9), the eccentric shaft assembly (9) is fixedly installed at the upper end of the fixed screen frame (1), and the eccentric shaft assembly (9) The installation center plane coincides with the center plane of the floating screen frame (2); the eccentric shaft assembly (9) includes an eccentric shaft (91), a double row ball bearing (92), an eccentric shaft support (93), and a transmission connecting rod (96). ), a spherical roller bearing (97) and a linkage shaft (98), both ends of the eccentric shaft (91) are respectively mounted on the eccentric shaft support (93) through the double row ball bearings (92) Inside, the eccentric shaft support (93) is fixedly installed on the surface of the fixed screen frame (1), and the eccentric shaft (91) has an eccentric structure at both ends, including a middle section (911) and symmetrically connected in the middle. The bearing mounting section (913) and the eccentric section (914) at both ends of the section (911), one side of the eccentric section (914) is also connected to the transition section (912), and the other side of the eccentric section (914) is connected to the driving section (915), The driving section (915) is connected to the output end of the motor (7) through the flap coupling (8), and one end of the transmission connecting rod (96) is connected to the eccentric section through a spherical roller bearing (97) (914) connected, the other end of the transmission connecting rod (96) is connected with the floating screen frame (2) through the linkage shaft (98);

The suspension device assembly (3) includes an upper fixed block (31) and a lower fixed block (32) connected by a screw (36), and the upper fixed block (31) is connected with the fixed screen frame (1) , The lower fixed block (32) is connected with the floating screen frame (2),

The suspension device assembly (3) also includes two groups of suspension swinging parts, the suspension swinging parts include a curved convex block (34) and a curved concave block (35) matched with the surface, and the two groups of suspension swinging parts are respectively fixed on The upper surface of the fixed block and the lower surface of the lower fixed block, and the outer sides of the upper and lower curved convex blocks (35) are respectively fastened by a fastening nut (33).
The forced drive self-balancing slack screen according to claim 1, wherein a sealing ring is provided between the eccentric shaft support (93) and the eccentric shaft (91).
The forced-drive self-balancing slack screen according to claim 1, wherein the eccentric shaft support (93) is a detachable piece, assembled by the support body, the front and rear end covers and bolts. to make.
The forced-drive self-balancing slack screen according to claim 1, wherein the top of the eccentric shaft support (93) is also provided with an oil nozzle (95).
A forced-drive self-balancing slack screen according to claim 1, characterized in that the transmission connecting rod (96) is a detachable piece, assembled by connecting rod body, left and right end caps and bolts .
The forcedly driven self-balancing slack screen according to claim 1, wherein a buffer spring (10) is provided between the fixed screen frame (1) and the floating screen frame (2).
A forced-drive self-balancing flaccid screen according to claim 1, wherein the flaccid screen further comprises an elastic screen surface (11), and the elastic screen surface (11) is composed of a plurality of rectangular screens. The surfaces are connected to each other, and the two ends of the rectangular screen surface are respectively fixed on the screen surface beams adjacent to the fixed screen frame (1) and the floating screen frame (2).
The forced-drive self-balancing flared screen according to claim 7, characterized in that the elastic screen surface (11) is made of polyurethane material.