CN105780575B - A kind of flat taper grinding disc of high consistency refining machine structure - Google Patents

Abstract

A flat-conical high-consistency refiner grinding disc structure, including a static grinding disc and a moving grinding disc that can be nested with each other, the static grinding disc includes a rough grinding area on the lower circumference of the static grinding disc and a fine grinding area on the upper circumference of the static grinding disc; the moving grinding disc Including the cylinder wall, the limit ring is arranged around the cylinder wall, the main shaft is installed inside the cylinder wall, the support frame is installed on the main shaft and connected with the limit ring; the limit ring divides the outer side of the cylinder wall into upper and lower circles, in the The lower circumference is the coarse grinding area and the coarse grinding area is installed, and the upper circumference of the cylinder wall is the fine grinding area and the fine grinding area is installed; the diversion is formed between the rough grinding area and the fine grinding area The grinding plate in the crushing area is installed at the bottom of the cylinder wall; the slurry enters the grinding chamber formed by the dynamic and static grinding discs, and is subjected to the force of grinding teeth between the rotor and the stator to produce a beating effect; the steam generated during the beating process is guided by the Groove discharge; the invention has the characteristics of high efficiency and easy replacement of grinding discs and grinding discs.

Description

A flat-conical high-consistency refiner disc structure

technical field

The invention relates to the technical field of refining equipment in the papermaking process, in particular to a flat-conical high-consistency refining disc structure.

Background technique

At present, the demand for pulp in the papermaking industry is increasing day by day. Although the efficiency of the refining process in the papermaking process has been improved, there are still problems in the refining process such as large fluctuations in pulp quality and high replacement costs for grinding discs. The refining elements of a traditional conical refiner include a conical stator and a conical rotor. At present, the refining elements of most conical refiners are integral structures, that is, the conical rotor or the stator are integrally cast and processed. For integrally cast rotors or stators, the service life is generally 30 to 60 days. Frequent replacement of worn stators or stators not only increases maintenance man-hours, causes fluctuations in pulp quality, but also increases refining costs.

Contents of the invention

In order to solve the problems existing in the above-mentioned prior art, the purpose of the present invention is to provide a flat-conical high-consistency refiner grinding plate structure, which has high efficiency and is easy to replace the flat-conical refining disc for dynamic and static grinding. The grinding disc structure is convenient for manufacturing and processing, improves the hardness of the conical grinding disc, prolongs the service life, reduces material waste, and reduces the manufacturing and use costs of the conical grinding disc.

In order to achieve the above object, the technical scheme adopted in the present invention is:

A flat-conical high-consistency refiner grinding disc structure, including a static grinding disc 1 and a moving grinding disc 2 that can be nested with each other, and the static grinding disc 1 includes a static grinding disc coarse grinding area 3 on its lower circumference and a static grinding disc on its upper circumference. Grinding disc fine grinding area 4, the static grinding disc rough grinding area 3 and static grinding disc fine grinding area 4 are respectively surrounded by eight grinding disc units 5;

The movable grinding table 2 includes a cylinder wall 11, a limit ring 15 is arranged around the cylinder wall 11, a main shaft 17 is vertically installed at the bottom of the inner cylinder of the cylinder wall 11, and a support frame 16 is installed on the main shaft 17 and is connected with the position limiting ring. The ring 15 is matched and connected; the limit ring 15 divides the outside of the cylinder wall 11 into upper and lower circumferences, and the lower circumference of the cylinder wall 11 is a rough grinding area, and the coarse grinding area grinding disc 7 is installed on the rough grinding area. The upper circumference of the cylinder wall 11 is a fine grinding area, and the fine grinding area grinding plate 8 is installed on the fine grinding area; a lower diversion groove is formed between the rough grinding area grinding plates 7, and the fine grinding area grinding plate 8 forms an upper diversion groove, the upper diversion groove and the lower diversion groove are on the same vertical line, and the upper diversion groove and the lower diversion groove form a diversion groove 9; the bottom of the cylinder wall 11 is equipped with Grinding discs in the crushing area 6.

The groove on the guide groove 9 gradually deepens and widens from the fine grinding area above the cylinder wall 11 to the crushing area at the bottom of the cylinder wall 11 .

The described grinding unit 5 is eight pieces.

The grinding plate 6 in the crushing area, the grinding plate 7 in the coarse grinding area and the grinding plate 8 in the fine grinding area are provided with tooth lines, and the slope of the tooth lines is 15°.

There are eight grinding discs 7 in the rough grinding area and eight grinding discs in the fine grinding area.

The tooth width and spacing of the grinding teeth of the grinding discs 6 in the crushing area are respectively greater than the tooth width and spacing of the grinding discs 7 in the coarse grinding area and the grinding discs 8 in the fine grinding area.

The grinding plate 6 in the crushing area, the grinding plate 7 in the coarse grinding area and the grinding plate 8 in the fine grinding area are installed on the cylinder wall 11 through bolt one 14 , bolt two 13 and bolt three 12 respectively.

Described limit ring 15 is divided into four pieces.

The beneficial effects of the present invention are:

The invention has the advantages of simple processing and manufacturing, high precision, convenient replacement of grinding discs and low cost of use; when a single grinding disc fails, maintenance or repair can be completed by replacing the substitute grinding disc.

Furthermore, the crushing area of the grinding disc adopts a larger tooth inclination angle and a larger grinding tooth width, which can generate pumping action on the refined slurry while the refiner is rotating, and improve the slurry from the crushing area to the conical shape. Mobility in the grinding zone.

Description of drawings

Figure 1 is an exploded view of the structure of the present invention.

Fig. 2 is an axonometric view of the present invention.

Fig. 3 is an exploded view of the movable grinding disc of the present invention.

Fig. 4 is an exploded view of the cylinder wall and the limiting ring of the present invention.

Fig. 5 is a sectional view of the movable grinding disc of the present invention.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings.

As shown in Figure 1, a flat-conical high-consistency refiner grinding disc structure includes a static grinding disc 1 and a moving grinding disc 2 that can be nested in each other, and the static grinding disc 1 includes a rough grinding area of the lower circumference of the static grinding disc 3 and the fine grinding area 4 of the static grinding disc on the upper circumference, the rough grinding area 3 of the static grinding disc and the fine grinding area 4 of the static grinding disc are respectively surrounded by eight grinding disc units 5;

As shown in FIG. 2 , the movable grinding disc 2 is composed of a crushing area, a rough grinding area and a fine grinding area, and two adjacent grinding plates of the diversion groove form a diversion groove 9 . The inclination of the teeth pattern in the crushing zone and the coarse and fine grinding zone is 15°. When the grinding disc rotates, it produces a pumping effect on the material. Because the grinding teeth in the crushing zone are wide and the spacing is large, the pumping capacity produced is relatively large. High, the material quickly flows to the coarse grinding area and the fine grinding area through the diversion groove, and is conducive to the discharge of steam.

The movable grinding table 2 includes a cylinder wall 11, a limit ring 15 is arranged around the cylinder wall 11, a main shaft 17 is vertically installed at the bottom of the inner cylinder of the cylinder wall 11, and a support frame 16 is installed on the main shaft 17 and is connected with the position limiting ring. The ring 15 is matched and connected; the limit ring 15 divides the outside of the cylinder wall 11 into upper and lower circumferences, and the lower circumference of the cylinder wall 11 is a rough grinding area, and the coarse grinding area grinding disc 7 is installed on the rough grinding area. The upper circumference of the cylinder wall 11 is a fine grinding area, and the fine grinding area grinding plate 8 is installed on the fine grinding area; a lower diversion groove is formed between the rough grinding area grinding plates 7, and the fine grinding area grinding plate 8 forms an upper diversion groove, the upper diversion groove and the lower diversion groove are on the same vertical line, and the upper diversion groove and the lower diversion groove form a diversion groove 9; the bottom of the cylinder wall 11 is equipped with Grinding discs in the crushing area 6.

The grinding plate 6 in the crushing area, the grinding plate 7 in the coarse grinding area and the grinding plate 8 in the fine grinding area are installed on the cylinder wall 11 through bolt one 14 , bolt two 13 and bolt three 12 respectively.

As shown in Figure 3, the crushing zone bolt 14 fixes the crushing zone grinding plate 6 on the cylinder wall 11. When replacing the crushing zone grinding plate, you only need to remove the fixing bolts and replace the grinding plate. Coarse grinding area bolt two 13 fixes the coarse grinding area grinding plate 7 on the cylinder wall 11, when replacing the coarse grinding area grinding plate 7, only need to pull down the fixing bolts and replace the grinding plate. Bolt three 12 in the fine grinding area fixes the grinding plate 8 in the fine grinding area on the cylinder wall 11. When replacing the grinding plate in the fine grinding area, you only need to remove the fixing bolts and replace the grinding plate.

As shown in Figure 4, the limit ring 15 is divided into four pieces, which are installed around the outside of the cylinder wall 11, and are used to limit the rough grinding area grinding plate 7 and the fine grinding area grinding plate 8 due to the impact load of axial force and steam. The resulting sliding increases the overall rigidity of the movable grinding disc 2.

As shown in Figure 5, the support frame 16 is installed on the main shaft 17 and cooperates with the limit ring 15, the limit ring 15 is fixed on the outside of the cylinder wall 11 by the limit bolt 18, and the support frame 16 is fixed on the inside of the cylinder wall 11 by bolts, It plays the role of supporting the cylinder and increasing the rigidity of the cylinder.

Working principle of the present invention:

Pulp enters the crushing area of the refiner from the front end (small end) of the conical refiner, and the pulp is driven by the high-speed rotating moving disc 2 to generate circumferential linear velocity and radial centrifugal force. Due to the conical rotor, the circumferential linear velocity and centrifugal force of the rear end (big end) are larger than those of the small end, and the pumping effect generated by the tooth profile and tooth inclination angle of the crushing area, rough grinding area and fine grinding area of the grinding disc structure, As a result, the static pressure of the large end is smaller than that of the small end, and under the "constraint" and guidance of the grinding teeth, the pulp has a tendency to move from the small end to the large end. Once the slurry enters the grinding cavity formed by the movable grinding disc 2 and the static grinding disc 1, it will be subjected to the mechanical force of grinding teeth between the rotor and the stator, resulting in a beating effect. The steam generated during the beating process is discharged from the guide groove 9 on the movable grinding plate, and the axial impact generated by the steam is mainly borne by the limiting ring 15 and the radial support frame 16 .

Claims (3)

1. A flat-conical high-consistency refiner grinding disc structure, including a static grinding disc (1) and a moving grinding disc (2) that can be nested with each other, characterized in that the static grinding disc (1) includes its lower circumference The rough grinding area (3) of the static grinding disc and the fine grinding area (4) of the upper circumference of the static grinding disc, the rough grinding area (3) and the fine grinding area (4) of the static grinding disc are respectively composed of eight grinding units ( 5) surrounded; The moving grinding table (2) includes a cylinder wall (11), and a limit ring (15) is arranged around the cylinder wall (11). A support frame (16) is installed on the main shaft (17) and is connected with a limit ring (15); The lower circumference of the cylinder is the coarse grinding area, on which the coarse grinding area grinding disc (7) is installed, and the upper circumference of the cylinder wall (11) is the fine grinding area, on which the fine grinding area is installed. The grinding discs (8) in the grinding area; the lower diversion groove is formed between the grinding discs (7) in the coarse grinding area, and the upper diversion groove is formed between the grinding discs (8) in the fine grinding area, and the upper diversion groove and the lower diversion groove The launder is on the same vertical line, the upper diversion groove and the lower diversion groove form a diversion groove (9); the bottom of the cylinder wall (11) is equipped with a grinding plate (6) in the crushing area; The grinding discs in the crushing area (6), the grinding discs in the rough grinding area (7) and the grinding discs in the fine grinding area (8) are respectively installed on the barrel through the first bolt (14), the second bolt (13) and the third bolt (12). on the wall (11); The limiting ring (15) is divided into four pieces; The groove on the guide groove (9) gradually deepens and widens from the fine grinding area above the cylinder wall (11) to the crushing area at the bottom of the cylinder wall (11); The grinding discs in the crushing area (6), the grinding discs in the rough grinding area (7) and the grinding discs in the fine grinding area (8) are provided with tooth lines, and the slope of the tooth lines is 15°. 2. A flat-conical high-consistency refiner disc structure according to claim 1, characterized in that, the grinding discs (7) in the rough grinding area and the grinding discs (8) in the fine grinding area have eight indivual. 3. A flat-conical high-consistency refiner disc structure according to claim 1, characterized in that the grinding discs (6) in the crushing zone have a larger tooth width and spacing than the grinding discs in the rough grinding zone (7) and the grinding tooth width and spacing of the grinding disc (8) in the fine grinding area.