CN218423011U

CN218423011U - Combined type roller gap control structure of high-pressure roller mill

Info

Publication number: CN218423011U
Application number: CN202222605607.5U
Authority: CN
Inventors: 曾海敏
Original assignee: Luanchuan Qiyuan Mining Co ltd
Current assignee: Luanchuan Qiyuan Mining Co ltd
Priority date: 2022-09-30
Filing date: 2022-09-30
Publication date: 2023-02-03
Anticipated expiration: 2032-09-30

Abstract

A composite roller gap control structure of a high-pressure roller mill comprises a rack, wherein a fixed roller and a movable roller are arranged in the rack, square bearing boxes are arranged at two ends of the movable roller, an oil cylinder for adjusting the roller gap is fixed on the rack, an equal-arm lever is hinged to the telescopic end of the oil cylinder, and two ends of the equal-arm lever are respectively pressed on the square bearing boxes at two ends of the movable roller; a pair of guide rails which are vertical to the axes of the fixed rollers are arranged on the frame, and the square bearing box can slide along the guide rails. The high-pressure roller mill is provided with an oil cylinder, and square bearing boxes at two ends of a movable roller obtain the same thrust through an equal-arm lever. Compared with a plurality of oil cylinders, the roller gap control structure does not need to consider the influence of individual difference of the oil cylinders on the thrust. More importantly, the roller gap control structure greatly simplifies a hydraulic control system and improves the reliability of the hydraulic system.

Description

Combined type roller gap control structure of high-pressure roller mill

Technical Field

The utility model belongs to the technical field of mining equipment and specifically relates to a high pressure grinding roller combined type roll gap control structure is related to.

Background

The high-pressure roller mill is also called a roller press or an extrusion mill, has the advantages of high efficiency, low energy consumption, light abrasion, low noise, convenient operation and the like, and is an efficient and energy-saving ore crushing device.

As shown in fig. 1, the conventional high-pressure roller mill includes a fixed roller 2 and a movable roller 4, and the fixed roller 2 and the movable roller 4 rotate relative to each other to crush ore. Bearing boxes 9 are installed at two ends of the movable roller 4, one pair or two pairs of oil cylinders 7 are arranged between the bearing boxes 9 and the rack, and the oil cylinders 7 can synchronously stretch and retract to adjust a roller gap between the fixed roller 2 and the movable roller 4. In order to ensure the uniformity of the roller gap, the thrust applied by each oil cylinder 7 to the bearing box 9 is kept consistent.

The existing problems are that firstly, because the oil cylinders have differences, the thrust of each oil cylinder is difficult to keep consistent; secondly, in order to prevent the movable roller from deflecting, a hydraulic control system is very complicated. The detailed structure of the hydraulic control system can be referred to patent application No. 202110261671.3.

SUMMERY OF THE UTILITY MODEL

In order to overcome the not enough in the background art, the utility model discloses a high pressure grinding roller combined type roll gap control structure adopts following technical scheme:

a composite roller gap control structure of a high-pressure roller mill comprises a rack, wherein a fixed roller and a movable roller are arranged in the rack, square bearing boxes are arranged at two ends of the movable roller, an oil cylinder for adjusting the roller gap is fixed on the rack, an equal-arm lever is hinged to the telescopic end of the oil cylinder, and two ends of the equal-arm lever are respectively pressed on the square bearing boxes at two ends of the movable roller; a pair of guide rails perpendicular to the axes of the fixed rollers are arranged on the frame, and the square bearing box can slide along the guide rails.

According to the technical scheme, a pair of bearing seats is fixed on the rack, and the fixed roller is installed between the pair of bearing seats.

The technical scheme is further improved, a pressure spring is placed between the bearing seat and the square bearing box, and the height of the pressure spring in a free state is equal to the distance between the square bearing box and the bearing seat.

Owing to adopt above-mentioned technical scheme, compare the background art, the utility model discloses following beneficial effect has:

the high-pressure roller mill is provided with the oil cylinder, and the square bearing boxes at the two ends of the movable roller obtain the same thrust through the equal-arm lever. Compared with a plurality of oil cylinders, the roller gap control structure does not need to consider the influence of individual difference of the oil cylinders on the thrust. More importantly, the roller gap control structure greatly simplifies a hydraulic control system and improves the reliability of the hydraulic system.

In addition, this high pressure roller mill has placed the pressure spring of big rigidity between bearing frame and square bearing box, alleviates the damage that torsional moment caused the guide rail through the deformation of pressure spring.

Drawings

Fig. 1 shows a schematic structural view of a conventional high-pressure roller mill.

Fig. 2 shows a schematic structural view of the high-pressure roller mill.

Fig. 3 shows a side view of fig. 2.

In the figure: 1. a frame-shaped frame; 2. a fixed roller; 3. a bearing seat; 4. a movable roller; 5. a square bearing housing; 6. an equal arm lever; 7. an oil cylinder; 8. a pressure spring; 9. a bearing housing; 10. a guide rail.

Detailed Description

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "front", "rear", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. It should also be noted that, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly and encompass, for example, both fixed and removable connections or integral connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through both elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 2 and 3, the high-pressure roller mill comprises a frame-shaped frame 1, wherein a fixed roller 2 and a movable roller 4 are arranged in the frame-shaped frame 1, the fixed roller 2 and the movable roller 4 are provided with independent transmission systems, and the fixed roller 2 and the movable roller 4 rotate relatively to crush ores under the driving of the transmission systems.

Specifically, a pair of bearing blocks 3 is fixed to the left end of the frame 1, and the fixed roller 2 is mounted between the pair of bearing blocks 3. Two pairs of guide rails 10 are arranged at the upper part and the lower part of the frame-shaped frame 1, and the guide rails 10 are vertical to the axis of the fixed roller 2. The two ends of the movable roller 4 are provided with square bearing boxes 5, the upper end and the lower end of each square bearing box 5 are provided with sliding grooves, and the sliding grooves are matched with the guide rails 10 to enable the square bearing boxes 5 to slide along the guide rails 10. In this way, the movable roll 4 can be brought in parallel close to the fixed roll 2 and the nip can be kept uniform.

An oil cylinder 7 is fixed at the right end of the frame, and one function of the oil cylinder 7 is to adjust the roller gap between the fixed roller 2 and the movable roller 4 according to the requirement of crushing granularity; the oil cylinder 7 has another function of avoiding the dead halt of the movable roller 4 through the retraction of the oil cylinder 7 when the ore which cannot be crushed occurs. An equal-arm lever 6 is hinged at the telescopic end of the oil cylinder 7, and two ends of the equal-arm lever 6 respectively prop against the square bearing boxes 5 at two ends of the movable roller 4. Referring to fig. 2, when the cylinder 7 is extended, the equal-arm lever 6 can equally divide the acting force, so that the square bearing boxes 5 at the two ends of the movable roller 4 obtain the same thrust. This solves the problem of unequal thrust forces being applied to the movable roller 4 at both ends. Compared with a plurality of oil cylinders 7, the oil cylinder 7 is arranged without considering the influence of individual difference on thrust, and the hydraulic control system is greatly simplified.

The stress of the movable roller 4 during working is unbalanced, when large ore blocks appear on one side of the roller surface of the movable roller 4, the resistance force of extrusion can generate unbalanced reaction force at two ends of the movable roller 4, and horizontal torsion moment is formed. Although the guide rail 10 can withstand this torsional moment, the guide rail 10 is damaged thereby.

In order to solve the problem, a high-rigidity pressure spring 8 is arranged between the bearing seat 3 and the square bearing box 5, and the height of the pressure spring 8 in a free state is equal to the distance between the square bearing box 5 and the bearing seat 3. That is to say, after the roller gap is adjusted to a certain clearance through the oil cylinder 7, the pretightening force of the square bearing box 5 and the bearing seat 3 on the pressure spring 8 is zero. Therefore, the high-rigidity compression springs 8 with different heights are required to be prepared according to the size of the roller gap in production.

Due to the existence of the large-rigidity pressure spring 8, when large ore blocks appear on the right side of the roller surface of the movable roller 4, the movable roller 4 has a clockwise torsion moment, and the pressure spring 8 positioned on the left side of the movable roller 4 is stressed to offset the torsion moment. When the bold ore appeared in the left side of 4 roll surfaces of activity roller, so 4 activity rollers have anticlockwise's torsional moment, and this torsional moment is offset to the pressure spring 8 atress that is located 4 right sides of activity roller this moment. Such a design would mitigate damage to the guide rail 10 from torsional moments.

The details of which are not described in detail in the prior art. Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a high pressure roller mill combined type roll gap control structure, high pressure roller mill includes the frame, is provided with a fixed roll and a movable roll in the frame, installs square bearing box, characterized by at the both ends of movable roll: an oil cylinder for adjusting a roller gap is fixed on the frame, an equal-arm lever is hinged to the telescopic end of the oil cylinder, and two ends of the equal-arm lever are respectively pressed on square bearing boxes at two ends of the movable roller; a pair of guide rails which are vertical to the axes of the fixed rollers are arranged on the frame, and the square bearing box can slide along the guide rails.

2. The composite roller gap control structure of the high-pressure roller mill according to claim 1, characterized in that: a pair of bearing blocks is fixed on the frame, and the fixed roller is installed between the pair of bearing blocks.

3. The composite roller gap control structure of the high-pressure roller mill according to claim 2, characterized in that: a pressure spring is placed between the bearing seat and the square bearing box, and the height of the pressure spring in a free state is equal to the distance between the square bearing box and the bearing seat.