A labyrinth seal structure for cone crusher

Abstract

The present invention relates to a labyrinth seal structure of a cone crusher, wherein a moving ring (4) rotating with the eccentric shaft (1) is arranged on the concentric section of an eccentric shaft (1), and a stationary ring (3) swinging with the moving cone (2) is arranged on the top of a moving cone (2), and the outer side surface of the stationary ring (3) is a conical surface. Since the conical surface of the stationary ring (3) has a certain inclination angle relative to the concentric section of the eccentric shaft (1), the inner side surface of the moving ring (4) is an irregular arc surface, and the irregular arc surface is in close contact with the inclined conical surface, thereby achieving sealing between the stationary ring (3) and the moving ring (4). The moving ring (4) rotates with the eccentric shaft (1), and the stationary ring (3) swings with the rotation of the eccentric shaft (1), so that the stationary ring (3) and the moving ring (4) are always in close contact and sealed. A plurality of blades (5) are arranged on the top of the moving ring (4) to prevent dust from entering from the top of the moving ring (4) and ensure lubrication between the eccentric shaft (1) and the copper sleeve.

Description

Technical Field

[0001] The invention relates to the technical field of cone crushers, in particular to a labyrinth sealing structure of a cone crusher. Background Art

[0002] In the existing cone crusher technology, the raw materials are crushed by rolling with the moving cone and the static cone, so a large amount of dust and fine particles will be generated during the crushing process. The top of the eccentric shaft is fixed on the frame. Since the moving cone will swing inside the cone crusher, there must be a gap between the fixed seat at the top of the eccentric shaft and the moving cone. Dust enters between the eccentric shaft and the copper sleeve through this gap, which will seriously increase the wear of the eccentric shaft and the copper sleeve and reduce the service life of the eccentric shaft and the copper sleeve. If fine particles enter between the eccentric shaft and the copper sleeve, it will cause the eccentric shaft or the copper sleeve to get stuck, and even directly damage the eccentric shaft and the copper sleeve. In addition, the dust particles themselves are very small, and ordinary seals cannot completely block the entry of dust. Dust has a serious impact on the coordination between the eccentric shaft and the copper sleeve.

[0003] Therefore, in the current cone crusher, there is no sealing structure that can form a good seal between the top of the eccentric shaft and the moving cone. Summary of the invention

[0004] The object of the present invention is to overcome the disadvantages of the prior art and provide a labyrinth sealing structure which can prevent dust from entering by wind force and can maintain sealing at all times.

[0005] The object of the present invention is achieved through the following technical solutions: a labyrinth sealing structure of a cone crusher, which is applied to the connection between the concentric section of the upper end of the eccentric shaft of the cone crusher and the moving cone. The sealing structure includes a moving ring and a static ring. The moving ring is arranged on the concentric section of the eccentric shaft of the cone crusher, and the static ring is arranged on the top of the moving cone; the outer side surface of the static ring is a conical surface; the axis of the conical surface is parallel to the axis of the eccentric section of the eccentric shaft, the inner side surface of the moving ring is an irregular arc surface, and the irregular arc surface is in contact with the conical surface of the static ring. The moving ring is provided with a locating pin and is connected to the eccentric shaft through the locating pin. The top surface of the moving ring is a plane, and a plurality of blades are arranged on the plane.

[0006] Specifically, the plurality of blades are distributed in a circle with the axis of the coaxial section of the eccentric shaft as the center, and generate outward wind force when the eccentric shaft is rotating.

[0007] Specifically, an axial oil delivery hole is arranged in the eccentric shaft, and the oil delivery hole serves as a section of the oil circulation route inside the cone crusher.

[0008] A protective cylinder is arranged above the moving ring, and the protective cylinder is fixed on the upper frame of the cone crusher. An annular groove with an opening facing downward is arranged in the protective cylinder, and the plurality of blades are all located in the annular groove.

[0009] The height of the lower end surface of the protective tube is not higher than the height of the top surface of the dynamic ring.

[0010] The present invention has the following advantages:

[0011] 1. The static ring and the dynamic ring are always in contact with each other when the eccentric shaft rotates, so that small particles cannot enter and the wear of the eccentric shaft and the copper sleeve is avoided;

[0012] 2. The blades set on the top of the dynamic ring generate wind force when the eccentric shaft rotates, preventing dust from approaching the sealing structure, thereby avoiding the influence of dust on the eccentric shaft and copper sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure after the present invention is installed;

[0014] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0015] Figure 3 It is the top view of the moving ring;

[0016] In the figure: 1-eccentric shaft, 2-moving cone, 3-static ring, 4-moving ring, 5-blade, 6-locating pin, 7-oil delivery hole, 8-protective cylinder. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

[0018] like Figure 1 and Figure 2As shown, a labyrinth seal structure of a cone crusher is applied to the connection between the concentric section at the upper end of the eccentric shaft 1 of the cone crusher and the moving cone 2, and is used to prevent dust or fine particles from entering the eccentric shaft 1 and the copper sleeve. The seal structure includes a moving ring 4 and a stationary ring 3. The moving ring 4 rotates with the eccentric shaft 1, and the stationary ring 3 does not rotate relative to the eccentric shaft 1. The moving ring 4 is arranged on the concentric section of the eccentric shaft 1 of the cone crusher, and the stationary ring 3 is arranged on the top of the moving cone 2; the outer side surface of the stationary ring 3 is a conical surface; the axis of the conical surface is parallel to the axis of the eccentric section of the eccentric shaft 1. When the eccentric shaft 1 rotates, the eccentric section drives the moving cone 2 to swing. Since the static ring 3 is located at the top of the moving cone 2, the static ring 3 moves with the swing of the moving cone 2, so that the axis of the conical surface of the static ring 3 is always consistent with the eccentric section; since the conical surface is inclined, the inner side surface of the dynamic ring 4 is an irregular arc surface, and the irregular arc surface fits the conical surface of the static ring 3; so that the dynamic ring 4 and the static ring 3 are sealed. The dynamic ring 4 is provided with a positioning pin 6 and is connected to the eccentric shaft 1 through the positioning pin 6. When the eccentric shaft 1 rotates, the dynamic ring 4 rotates with the eccentric shaft 1. Because the contact surface between the static ring 3 and the dynamic ring 4 is a standard conical surface, and the swing of the conical surface changes according to the position of the eccentric section, the contact surface of the dynamic ring 4 and the static ring 3 will always fit when the eccentric shaft 1 rotates. The top surface of the dynamic ring 4 is a plane, and a number of blades 5 are provided on the plane. The function of the blades 5 is to generate wind force, thereby preventing a large amount of dust from entering between the eccentric shaft 1 and the copper sleeve, and ensuring the lubrication effect between the eccentric shaft 1 and the copper sleeve.

[0019] like Figure 3 As shown, the plurality of blades 5 are distributed in a circle with the axis of the concentric section of the eccentric shaft 1 as the center, and generate outward wind force when the eccentric shaft 1 rotates. The top of the blade 5 is the connection between the frame and the top of the eccentric shaft 1, and the wind force generated by the blade 5 mainly prevents dust from entering from the top of the dynamic ring.

[0020] Specifically, an axial oil delivery hole 7 is provided in the eccentric shaft 1, and the oil delivery hole 7 serves as a section of the oil circulation route inside the cone crusher.

[0021] A protective cylinder 8 is arranged above the moving ring 4, and the protective cylinder 8 is fixed on the upper frame of the cone crusher. An annular groove with an opening facing downward is arranged in the protective cylinder 8, and the plurality of blades 5 are all located in the annular groove.

[0022] The lower end surface height of the protective tube 8 is not higher than the top surface height of the dynamic ring 4. The protective tube 8 is used to prevent fine particles from entering the area where the blades 5 are located, and to protect the blades 5 and the part between the blades 5 and the upper frame.

Claims

1. A labyrinth seal structure for a cone crusher, the seal structure being applied to the connection between the concentric section at the upper end of the eccentric shaft (1) of the cone crusher and the moving cone (2), characterized in that: The sealing structure comprises a moving ring (4) and a stationary ring (3), wherein the moving ring (4) is arranged on a concentric section of an eccentric shaft (1) of a cone crusher, and the stationary ring (3) is arranged on the top of a moving cone (2); the outer side surface of the stationary ring (3) is a conical surface; the axis of the conical surface is parallel to the axis of the eccentric section of the eccentric shaft (1); the inner side surface of the moving ring (4) is an irregular arc surface, and the irregular arc surface is in contact with the conical surface of the stationary ring (3); and a positioning device is arranged on the moving ring (4). The movable ring (4) is connected to the eccentric shaft (1) through the positioning pin (6); the top surface of the movable ring (4) is a plane, and a plurality of blades (5) are arranged on the plane; the plurality of blades (5) are distributed in a circle with the axis of the concentric section of the eccentric shaft (1) as the center, and generate wind force directed outward when the eccentric shaft (1) rotates; a protective cylinder (8) is arranged above the movable ring, and the protective cylinder (8) is fixed on the upper frame of the cone crusher, and a protective cylinder (8) is arranged inside the protective cylinder (8) An annular groove with an opening facing downward, wherein the plurality of blades (5) are all located in the annular groove.

2. The labyrinth seal structure of a cone crusher according to claim 1, characterized in that: An axial oil delivery hole (7) is provided in the eccentric shaft (1).

3. The labyrinth seal structure of a cone crusher according to claim 1, characterized in that: The height of the lower end surface of the protective tube (8) is not higher than the height of the top surface of the dynamic ring.

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