Slide shoe sealing structure of cement mill

Abstract

The utility model belongs to the technical field of sliding shoe sealing structures, and discloses a sliding shoe sealing structure of a cement mill, which comprises a housing surrounding a sliding shoe, and a first sealing ring and a second sealing ring which are arranged between an inner ring of the housing and an outer ring of the sliding shoe and used for preventing lubricating oil from leaking. The two second sealing rings are located at the two ends of the inner cavity of the housing correspondingly, and the two first sealing rings are located between the two second sealing rings. A detachable pre-supporting mechanism is arranged between the inner ring of the second sealing ring and the outer ring of the sliding shoe, the pre-supporting mechanism is provided with a ring body, the outer edge of the circumference of the ring body is provided with an annular limiting protrusion, the inner ring of the ring body is provided with a bull eye ball bearing, the outer circumference of the ring body is sleeved with the second sealing ring, and the limiting protrusion is arranged on the outer edge of the ring body. And the ball end of the bull eye ball bearing is in contact with the circumferential surface of the sliding shoe.

Description

Technical Field

[0001] The utility model belongs to the technical field of sliding shoe sealing structures, and in particular relates to a sliding shoe sealing structure of a cement mill. Background Art

[0002] The support used by the cement mill currently in use is a traditional sliding shoe bearing support structure. Due to the defects of the sealing structure it uses, there is relative movement between the sealing strip and the sliding shoe when the mill is running, and the contact part between the sealing strip and the sliding shoe begins to wear. As the operating time increases, the wear of the sealing strip increases, resulting in a gap between the sealing strip and the sliding shoe, and a large amount of lubricating oil leaks out, which not only affects the environment, but also causes a waste of lubricating oil. Over time, the sliding shoe temperature will be high, affecting the normal operation of the mill. Utility Model Content

[0003] In view of the problems raised by the above background technology, the purpose of the utility model is to provide a sliding shoe sealing structure for a cement mill.

[0004] In order to achieve the above technical purpose, the technical solution adopted by the utility model is as follows:

[0005] A shoe sealing structure of a cement mill comprises a cover shell surrounding the shoe, a first sealing ring and a second sealing ring for preventing lubricating oil leakage are arranged between the inner ring of the cover shell and the outer ring of the shoe, the second sealing rings are two in total and are respectively located at two ends of the inner cavity of the cover shell, and the first sealing rings are two in total and are located between the two second sealing rings;

[0006] A detachable pre-support mechanism is arranged between the inner ring of the second sealing ring and the outer ring of the sliding shoe, the pre-support mechanism is provided with a ring body, the circumferential outer edge of the ring body is provided with an annular limiting protrusion, the inner ring of the ring body is provided with a bull's eye ball bearing, the second sealing ring is sleeved on the outer circumference of the ring body, and the ball end of the bull's eye ball bearing contacts with the circumferential surface of the sliding shoe.

[0007] It is further defined that the inner ring of the cover shell is provided with a plurality of annular embedding grooves for placing the first sealing ring and the second sealing ring. With such a structural design, the embedding grooves can make the positions of the first sealing ring and the second sealing ring more stable after installation.

[0008] It is further defined that a screw hole is radially provided at a position of the cover shell corresponding to the embedding groove, the screw hole is connected to the embedding groove, the screw hole is connected to a bolt, and the outer ring of the screw head of the bolt is provided with friction stripes. With such a structural design, the bolt can achieve radial displacement after being screwed through the screw hole, so that after the inner ring of the first sealing ring or the second sealing ring is worn, it is pressed down to make the first sealing ring and the second sealing ring fit more closely to the surface of the sliding shoe to prevent rapid leakage of lubricating oil due to wear gaps. The bolt is pressed down to fill the gaps, which is generally only used as an emergency to avoid wear of the first sealing ring and the second sealing ring and delay of normal operation time and production process.

[0009] It is further defined that the inner rings of the first sealing ring and the second sealing ring are provided with a plurality of annular gaps with toothed cross-sections. With such a structural design, the toothed annular gaps can divide the inner rings of the first sealing ring and the second sealing ring into a plurality of small sealing rings, thereby providing multiple seals and enhancing the sealing effect.

[0010] It is further defined that a pull ring is provided at the outer end of the ring body. With such a structural design, the pull ring is convenient for pulling out the ring body.

[0011] The beneficial effects of the utility model include: while sealing the lubricating oil, a spare second sealing ring is reserved; when the first sealing ring fails, the second sealing ring can quickly replace the first sealing ring to achieve the sealing effect by withdrawing the ring body, thereby reducing the impact of sealing failure on production. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention can be further described by the non-limiting embodiments given in the accompanying drawings;

[0013] Figure 1 It is a structural schematic diagram of an embodiment of a sliding shoe sealing structure of a cement mill of the utility model;

[0014] Figure 2 The utility model is a cement mill sliding shoe sealing structure embodiment Figure 1 A partial enlarged view of the middle A;

[0015] Figure 3 It is a structural schematic diagram of a cover shell in an embodiment of a sliding shoe sealing structure of a cement mill of the utility model;

[0016] Figure 4 It is a structural schematic diagram of a pre-support mechanism in an embodiment of a sliding shoe sealing structure of a cement mill of the utility model;

[0017] Figure 5 It is a structural schematic diagram of bolts in an embodiment of a sliding shoe sealing structure of a cement mill of the utility model;

[0018] The main component symbols are described as follows:

[0019] 1. Cylinder;

[0020] 2. Slippery shoes;

[0021] 3. Cover shell; 31. Embedding groove; 32. Screw hole;

[0022] 4. The first sealing ring;

[0023] 5. Second sealing ring;

[0024] 6. Pre-support mechanism; 61. Ring body; 62. Limiting protrusion; 63. Bull's eye ball bearing; 64. Pull ring;

[0025] 7. Bolts. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0027] like Figure 1-5 As shown, a sliding shoe sealing structure of a cement mill of the utility model comprises a cover shell 3 surrounding a sliding shoe 2, a first sealing ring 4 and a second sealing ring 5 for preventing lubricating oil leakage are arranged between the inner ring of the cover shell 3 and the outer ring of the sliding shoe 2, there are two second sealing rings 5 ​​and they are respectively located at the two ends of the inner cavity of the cover shell 3, there are two first sealing rings 4 and they are located between the two second sealing rings 5;

[0028] A detachable pre-support mechanism 6 is arranged between the inner ring of the second sealing ring 5 and the outer ring of the sliding shoe 2. The pre-support mechanism 6 is provided with a ring body 61. The outer edge of the circumference of the ring body 61 is provided with an annular limiting protrusion 62. The inner ring of the ring body 61 is provided with a bull's eye ball bearing 63. The second sealing ring 5 is sleeved on the outer circumference of the ring body 61. The ball end of the bull's eye ball bearing 63 contacts the circumferential surface of the sliding shoe 2.

[0029] In this embodiment:

[0030] The sliding shoe 2 is installed on the outer ring of the cylinder 1, and the sliding shoe 2 and the cover 3 are sealed by the first sealing ring 4 and the second sealing ring 5 to prevent the leakage of lubricating oil;

[0031] Specifically, the first sealing ring 4 is the main seal, and the second sealing ring 5 is the backup seal. When the first sealing ring 4 has not failed, the second sealing ring 5 does not have a sealing effect. The pre-supporting mechanism 6 arranged between the inner ring of the second sealing ring 5 and the outer ring of the sliding shoe 2 props up the second sealing ring 5 to prevent the second sealing ring 5 from contacting the sliding shoe 2. The annular limiting protrusion 62 on the outer edge of the circumference of the ring body 61 is used to assist in fixing the position of the second sealing ring 5 to prevent the second sealing ring 5 from falling off during the rotation of the sliding shoe 2. The bull's eye ball bearing 63 reduces the friction resistance to the rotation of the sliding shoe 2 by rolling the ball.

[0032] When the first sealing ring 4 has a friction gap due to long-term relative movement with the sliding shoe 2, the staff directly pulls out the pre-support mechanism 6 along the axial direction of the sliding shoe 2, and the second sealing ring 5 is separated from the ring body 61 and is no longer squeezed by the ring body 61. The second sealing ring 5 recovers its deformation, and the inner ring is in direct contact with the surface of the sliding shoe 2, producing a sealing effect;

[0033] Since the spare second sealing ring 5 is reserved, when the first sealing ring 4 fails, the second sealing ring 5 can quickly replace the first sealing ring 4 to achieve a sealing effect, thereby reducing the impact on production.

[0034] Preferably, the inner ring of the housing 3 is provided with a plurality of annular embedding grooves 31 for inserting the first sealing ring 4 and the second sealing ring 5. With such a structural design, the embedding grooves 31 can make the positions of the first sealing ring 4 and the second sealing ring 5 more stable after installation. In fact, other structural shapes that can improve the placement stability can also be considered according to specific circumstances.

[0035] Preferably, the cover 3 is provided with a screw hole 32 in the radial direction at the position corresponding to the embedding groove 31, the screw hole 32 is connected to the embedding groove 31, the screw hole 32 is connected to the bolt 7, and the outer ring of the screw head of the bolt 7 is provided with friction stripes. With such a structural design, the bolt 7 can achieve radial displacement after being screwed through the screw hole 32, so that after the inner ring of the first sealing ring 4 or the second sealing ring 5 is worn, it is pressed down to make the first sealing ring 4 and the second sealing ring 5 fit more closely with the surface of the sliding shoe 2 to prevent the rapid leakage of lubricating oil due to the wear gap. The bolt 7 is pressed down to fill the gap, which is generally only used as an emergency to avoid the wear of the first sealing ring 4 and the second sealing ring 5 and delay the normal operation time and production process. In fact, other emergency sealing structures can also be considered according to specific circumstances.

[0036] Preferably, the inner rings of the first sealing ring 4 and the second sealing ring 5 are provided with a plurality of annular gaps with tooth-shaped cross sections. Such a structural design and the tooth-shaped annular gaps can divide the inner rings of the first sealing ring 4 and the second sealing ring 5 into a plurality of small sealing rings, thereby providing multiple seals and enhancing the sealing effect. In fact, other structural shapes that can improve the sealing effect can also be considered according to specific circumstances.

[0037] Preferably, the outer end of the ring body 61 is provided with a pull ring 64, and with such a structural design, the pull ring 64 is convenient for pulling out the ring body 61. In fact, other force structures for pulling out the ring body 61 can also be specifically considered according to specific circumstances.

[0038] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the relevant technical field without departing from the spirit and technical ideas disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A sliding shoe sealing structure for a cement mill, characterized in that: It comprises a casing (3) surrounding a sliding shoe (2), a first sealing ring (4) and a second sealing ring (5) for preventing leakage of lubricating oil being arranged between the inner ring of the casing (3) and the outer ring of the sliding shoe (2), two second sealing rings (5) being provided and being located at two ends of the inner cavity of the casing (3), and two first sealing rings (4) being provided and being located between the two second sealing rings (5); A detachable pre-support mechanism (6) is arranged between the inner ring of the second sealing ring (5) and the outer ring of the sliding shoe (2); the pre-support mechanism (6) is provided with a ring body (61); an annular limiting protrusion (62) is provided on the outer circumference of the ring body (61); a bull's eye ball bearing (63) is provided on the inner ring of the ring body (61); the second sealing ring (5) is sleeved on the outer circumference of the ring body (61); and the ball end of the bull's eye ball bearing (63) contacts the circumferential surface of the sliding shoe (2).

2. The sliding shoe sealing structure of a cement mill according to claim 1, characterized in that: The inner ring of the housing (3) is provided with a plurality of annular embedding grooves (31) for receiving the first sealing ring (4) and the second sealing ring (5).

3. The sliding shoe sealing structure of a cement mill according to claim 2, characterized in that: The cover shell (3) is provided with a screw hole (32) in the radial direction at a position corresponding to the embedding groove (31); the screw hole (32) is connected to the embedding groove (31); the screw hole (32) is connected to a bolt (7); and the outer ring of the screw head of the bolt (7) is provided with friction stripes.

4. The sliding shoe sealing structure of a cement mill according to claim 1, characterized in that: The inner rings of the first sealing ring (4) and the second sealing ring (5) are provided with a plurality of annular gaps with tooth-shaped cross sections.

5. The shoe sealing structure of a cement mill according to claim 1, characterized in that: A pull ring (64) is provided at the outer end of the ring body (61).

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