A quick-change oil and gas sealing system

Abstract

The present invention belongs to the technical field of accessories for wire rod rolling mills, and particularly relates to a quick-change oil-gas sealing system for high-speed wire rod rolling mills. The technical solution for forming this sealing system includes: a sealing mechanism sleeved in the eccentric disc; a radial inner blowing oil-gas air duct communicated with the air holes is arranged in the disc body of the eccentric disc; an air flow outer ring groove corresponding to the inner blowing oil-gas air duct is arranged on the inner circle forming the eccentric disc; a number of high-pressure air flow blocking slot holes arranged in an "L" shape are arranged in the water cooling direction on the inner circle forming the eccentric disc, and the air duct outlet faces the direction of the double-shoulder structure forming the sealing member. This system can effectively prevent cooling water from entering the labyrinth structure and improve the isolation and sealing effect between the cooling water and lubricating oil of the high-speed wire rod rolling mill.

Description

Technical Field

[0001] The invention belongs to the technical field of accessories for wire rolling mills, and particularly relates to a quick-change oil-gas sealing system used in conjunction with high-speed wire rolling mills. Background Art

[0002] The oil-gas sealing system for high-speed wire rolling mills is a fitting used on the fifth or sixth generation of metal wire finishing mills, mainly used for isolating and sealing the cooling water of the rolling mill roll rings from the lubricating oil in the roll box. The structure of this system includes an "8" - shaped plate provided with two shaft holes for fixing the roll shaft, and a sealing mechanism composed of an eccentric disk for adjusting the axial distance of the roll shaft and a sealing bracket sleeved therein in the shaft hole. In order to improve its sealing effect, the Chinese patent application number is

[0003] —— 201910795730.8, and the invention patent application with the publication number of CN110388466A discloses a quick-change oil-gas sealing system for high-speed wire rolling mills. The structure of this system includes an "8" - shaped plate, an eccentric disk, a sealing member formed by an elastic sealing ring and a steel support ring sleeved in the eccentric disk, and upper and lower sealing rings sleeved on both sides thereof and forming corresponding upper and lower labyrinth mechanisms; air holes capable of being connected to an external air source are provided in the plate wall on one end side or / and both end sides of the "8" - shaped plate, and a radial inner-blowing oil-gas air passage communicated with the air holes is provided in the disk body of the eccentric disk; a number of high-pressure air-flow blocking slots are provided in the water-cooling direction on the inner circle forming the eccentric disk.

[0004] That is, high-pressure air-flow blocking slots are provided on the inner circle of the eccentric disk. Through high-pressure oil and gas, wastewater can be effectively prevented from infiltrating into the gap between the elastic sealing ring and the eccentric disk, achieving a sealing effect; and the high-pressure air-flow blocking slots are obliquely arranged at a three-dimensional acute angle with the central axis of the sealing member. The high-pressure oil and gas form a high-pressure swirling flow in the upper labyrinth, which can effectively prevent the cooling water from pouring into the upper labyrinth, greatly reducing the possibility of entering the lubricating oil tank through the labyrinth and improving the sealing effect; however, the direction of the above-mentioned high-pressure air-flow blocking slots causes the high-pressure air flow to directly blow on the inner side surface of the sealing ring and the wing edges forming the sealing ring. When the air flow is unstable, the air flow pressure exerted on the inner side surface of the sealing ring, especially on the wing edges forming the sealing ring, is unstable, resulting in unstable sealing performance between the two and thus affecting its use effect. Summary of the Invention

[0005] The purpose of the invention is to provide a quick-change oil-gas sealing system for high-speed wire rolling mills that can form a high-pressure turbulent gas in the space between the inner side surface of the sealing ring and the wing edges forming the sealing ring, effectively prevent the cooling water from entering the labyrinth structure, and improve its isolation and sealing effect.

[0006] To achieve the above purpose, the technical solution adopted by the invention is as follows:

[0007] A quick-change oil and gas sealing system, the structure of which includes

[0008] It can be sleeved on the eccentric disc, including a sealing member formed by an elastic sealing ring (51) and upper and lower sealing rings (61, 62) sleeved on both sides thereof and forming upper and lower labyrinth mechanisms (66, 67) corresponding to each other; upper and lower wing structures (55, 56) capable of forming a sealing contact with the inner sides of the upper and lower sealing rings (61, 62) are arranged on the upper and lower sides of the elastic sealing ring (51).

[0009] A radial inner blowing oil and gas air duct (44) is arranged in the disc body of the eccentric disc; a number of high-pressure air flow blocking slots (54) are arranged in the water cooling direction on the inner circle forming the eccentric disc; its characteristics are as follows:

[0010] On the side forming the upper labyrinth mechanism (66), the eccentric disc protrudes from the elastic sealing ring, and a high-pressure air flow blocking slot (54) is formed between the two, and the air duct outlet 541 thereof is consistent with the side direction of the body of the sealing ring 51, that is, the high-pressure air flow blocking slot is arranged in an "L" - shaped bend.

[0011] In the structure of the above-mentioned quick-change oil and gas sealing system, the following additional technical characteristics are also included:

[0012] —— The included angle between the elbow of the air duct outlet forming the high-pressure air flow blocking slot (54) and the radial direction of the sealing member is between 90 degrees and 180 degrees;

[0013] —— The included angle α is a right angle of 90 degrees;

[0014] —— A quick-change oil and gas sealing bracket (3) is arranged between the elastic sealing ring (51) forming the sealing member and the eccentric disc. The quick-change oil and gas sealing bracket (3) is composed of a radial ring (35) and an axial ring (36) vertically integrated therewith, that is, its cross-section is in a "T" or "L" - shaped structure; the quick-change oil and gas sealing bracket is fixed to the eccentric disc or the elastic sealing ring through its radial ring (35).

[0015] —— The width of the elastic sealing ring (51) forming the sealing member is equal to the width of the eccentric disc (4); one end of the steel support ring (52) forming the sealing member protrudes from the outer ring surface of the elastic sealing ring (51) to form a first positioning convex ring (58); the quick-change oil and gas sealing bracket (3) is fixed to the eccentric disc through screws (31), and a positioning ring groove (32) corresponding to the first positioning convex ring (58) protruding from the outer side surface of the elastic sealing ring (51) is arranged on its upper side part.

[0016] - One end of the steel support ring (52) forming the seal projects out of the outer side of the elastic sealing ring (51) to form a second positioning convex ring (59); the quick-change oil and gas sealing bracket (3) is fixed to the eccentric disc by screws (31), and the quick-change oil and gas sealing bracket (3) is provided with an outer ring (33), and a positioning ring groove (32) corresponding to the second positioning convex ring (59) protruding out of the outer side of the elastic sealing ring (51) is provided on the outer ring (33);

[0017] - Convex rings (63) are provided on the inner sides of the upper and lower sealing rings (61, 62), double-shoulder mechanisms (64) are provided at the upper and lower ends of the elastic sealing ring forming the seal, and a non-contact structure is formed between the double-shoulder mechanisms and the convex rings, so that a labyrinth structure is formed between the two;

[0018] - The width of the upper sealing ring (61) forming the seal is greater than the width of the elastic sealing ring (51), and a gap (68) can be formed between the upper sealing ring and the eccentric disc;

[0019] - An air flow outer ring groove (53) corresponding to the inner blowing oil and gas air duct (44) is provided on the inner circle of the eccentric disc.

[0020] Compared with the prior art, the quick-change oil and gas sealing system for a high-speed wire rod rolling mill provided by the present invention has the following advantages: First, since the eccentric disc forming the system is larger than the thickness of the seal, the high-pressure air flow blocking slot is arranged in an "L"-shaped bend, so that the air duct outlet faces the direction of the double-shoulder structure forming the seal, so that the blown high-pressure air flow can be blown into the sealing space 66 formed by the double-shoulder mechanism of the elastic sealing ring, the upper wing structure and the inner side surface of the sealing ring, form a vortex and overflow from the air flow outer ring groove under high pressure, avoiding the influence of unstable air flow on the upper wing structure and achieving the sealing effect; Second, since the included angle between the elbow of the air duct outlet forming the high-pressure air flow blocking slot and the radial direction of the seal is between 90 degrees and 180 degrees, preferably a right angle of 90 degrees, high-pressure oil and gas will form a high-pressure swirl in the upper labyrinth, which can effectively prevent cooling water from pouring into the upper labyrinth, greatly reducing the possibility of entering the lubricating oil tank through the labyrinth and improving the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the quick-change oil and gas sealing system;

[0022] Figure 2 For forming Figure 1 It is a structural schematic diagram of the quick-change oil and gas "8"-shaped plate forming the sealing system;

[0023] Figure 3 For forming Figure 1The first structural schematic diagram of the right roll shaft mechanism of the system shown;

[0024] Figure 4 To form Figure 1 The second structural schematic diagram of the right roll shaft mechanism of the system shown.

[0025] Figure 5 The structural schematic diagram of the sealing mechanism of this system. Specific implementation manners

[0026] The following further elaborates in detail on the structure and working principle of the quick-change oil-gas sealing system provided by the present invention in conjunction with the attached drawings.

[0027] As shown in Figures 1, 2 and 3, it is the working principle structural schematic diagram of the quick-change oil-gas sealing system for high-speed wire rod rolling mills provided by the present invention. The structure of this quick-change oil-gas sealing system is provided with two "8"-shaped plates 1 for fixing the roll shaft holes 11 on the left and right. In the two shaft holes, there are respectively eccentric discs 4 (also known as "quick-change oil-gas sealing plates") for adjusting the axial distance of the left and right roll shafts 12, and a sealing mechanism 5 sleeved in the eccentric discs; on the outer circumferential circle of the outer circle of the above-mentioned eccentric disc, there are two sealing groove rings 42 that can respectively fit into the sealing rings 41, and an air flow ring groove 43 is provided between the two sealing groove rings; in the radial direction of the air flow ring groove, there are several inner blowing oil-gas air channels 44 communicating with its inner wall; in the plate walls on both ends (or one end) of the above-mentioned "8"-shaped plate, there are air holes 13 that can be connected to the external air source 2, and the air holes are correspondingly communicated with the air flow ring groove 43 of the eccentric disc fixed in the above-mentioned shaft hole; the sealing mechanism 5 fixed in the eccentric disc includes a sealing member formed by an elastic sealing ring 51 made of rubber and plastic material and a steel support ring 52, and upper and lower sealing rings 61, 62 sleeved on both sides of it and forming upper and lower labyrinth mechanisms 66, 67 with the sealing member; on the inner circle of the above-mentioned eccentric disc (or on the outer circumferential circle of the elastic sealing ring 51 of the above-mentioned sealing member), there is an air flow outer ring groove 53 corresponding to and communicating with the inner blowing oil-gas air channel 44 of the eccentric disc; in the direction of the cooling water of the above-mentioned sealing member, there are several high-pressure air flow blocking holes 54 in the air flow outer ring groove; the thickness of the eccentric disc 4 is greater than the thickness of the elastic sealing ring 51, and the above-mentioned high-pressure air flow blocking holes 54 are arranged in an "L"-shaped bend 542, and its air channel outlet 541 is consistent with the side direction of the sealing ring 51 body. The purpose of setting the air flow outer ring groove 53 is to prevent impurities in the high-pressure oil-gas from blocking the inner blowing oil-gas air channel 44 and the high-pressure air flow blocking holes 54, and to facilitate quick disassembly for cleaning.

[0028] Its working principle is as follows: The sealing mechanism 5 sleeved on the eccentric disc 4 is radially fixed on the roll shaft 12 that rotates at high speed during steel rolling. It includes an eccentric disc fixed in the shaft hole of the figure-eight plate and the sealing mechanism fixed in this eccentric disc, which is used for the sealing isolation of the cooling water of the steel rolling roll ring 14 and the lubricating oil in the roll box 6. First, high-pressure oil and gas are introduced into the air holes 13 in the side plates at both ends of the figure-eight plate through the external air source 2. The high-pressure oil and gas enter the air flow ring groove 43 of the eccentric disc. Due to the relatively high pressure of the high-pressure oil and gas, it can effectively prevent the infiltration of cooling water or lubricating oil caused by the aging and failure of the sealing ring 41 fixed on the outer circumference of the eccentric disc. Therefore, it can effectively avoid the sealing problem between the eccentric disc and the inner wall of the shaft hole 11. The high-pressure oil and gas in the above-mentioned air flow ring groove 43 then enter the outer air flow ring groove 53 through one or at least three (preferably six or eight that can generate uniform air flow performance and ensure the strength of the eccentric disc) radially inward blowing oil and gas air channels 44 arranged radially in the disc body of the eccentric disc. Then, it passes through the high-pressure air flow blocking slot hole 54 and directly blows into the space 661 formed by the double-shoulder mechanism 64 of the elastic sealing ring, the upper wing structure 55, and the inner side of the sealing ring through the air channel outlet 541 after bending, forming a vortex and overflowing from the outer air flow ring groove 68 at high pressure, avoiding the influence of unstable air flow on the upper wing structure 55, effectively preventing the cooling water from infiltrating into the lubricating oil in the roll box on the other side of the eccentric disc through the sealing parts constituting the sealing mechanism, and achieving the sealing effect.

[0029] In the structure of the quick-change oil and gas sealing system of the above high-speed wire rod mill:

[0030] —— As Figure 3 , 4 and shown in Figure 5, the elbow 542 (i.e., the connecting section with the high-pressure air flow blocking slot hole 54) of the air channel outlet 541 constituting the above high-pressure air flow blocking slot hole 54 and the radial angle α of the above sealing part (elastic sealing ring 51) is between 90 degrees and 180 degrees, especially a right angle of 90 degrees (so that the blown high-pressure air flow is tangential to the double-shoulder structure 64). The high-pressure oil and gas form a high-pressure swirl in the formed space 661 and are ejected at high pressure from the outer air flow ring groove 53, effectively preventing the cooling water from pouring into the space 661 and the upper labyrinth 66, greatly reducing the possibility of entering the lubricating oil tank through the labyrinth, and improving the sealing effect.

[0031] ——In order to further improve the oil and gas ejection effect of the high-pressure air flow blocking the slot hole 54, and be able to clean the blocked inner blown oil and gas air duct and the air flow outer ring slot in a timely and rapid manner, and at the same time enable effective positioning and fixing between the elastic sealing ring 51 forming the seal and the eccentric disk, a quick-change oil and gas sealing bracket 3 composed of a radial ring 35 and an axial ring 36 with a "T" or "L" cross-section perpendicular to it is provided between the two; this sealing bracket can be fixed to the elastic sealing ring, or preferably fixed to the above-mentioned eccentric disk side on the lubricating oil tank side; its structure

[0032] As Figure 3 shown: That is, at the lower labyrinth mechanism 67 formed by the elastic sealing ring 51 forming the above-mentioned seal and the above-mentioned eccentric disk 4 is its structure; one end of the steel support ring 52 forming the seal protrudes from the outer ring surface of the elastic sealing ring 51 to form a first positioning convex ring 58; the radial ring 35 of the above-mentioned quick-change oil and gas sealing bracket ring 3 is fixed to the eccentric disk by screws 31, and a positioning ring groove 32 corresponding to the first positioning convex ring 58 protruding from the outer side surface of the elastic sealing ring 51 and convenient for quick disassembly and assembly is provided on its axial ring 36. That is, the "L"-shaped quick-change oil and gas sealing bracket ring 3 is fixed to the inner side surface of the eccentric disk by screws, and forms an air flow outer ring slot 53 and an obliquely arranged high-pressure air flow blocking slot hole 54 with its inner side surface. At the same time, the first positioning convex ring 58 on the outer side surface of the elastic sealing ring 51 is snapped into the positioning ring groove 32 to achieve quick installation. Its structure can also be

[0033] As Figure 4 shown, that is, when the lower labyrinth mechanism 67 formed by the elastic sealing ring 51 forming the above-mentioned seal and the above-mentioned eccentric disk 4 is a protruding structure; one end of the steel support ring 52 in the elastic sealing ring of this structure protrudes from the outer side surface of the elastic sealing ring 51 to form a second positioning convex ring 59; the quick-change oil and gas sealing bracket 3 is a "T" structure, that is, its radial ring 35 is fixed to the eccentric disk by screws 31, and the positioning ring groove 32 provided on the outer ring 33 of the radial ring 35 is positioned corresponding to the second positioning convex ring 59 protruding from the outer side surface of the elastic sealing ring 51; that is, the quick-change oil and gas sealing bracket ring 3 is fixed to the inner side surface of the eccentric disk by screws, the axial ring 36 forms an air flow outer ring slot 53 and an obliquely arranged high-pressure air flow blocking slot hole 54 with its inner side surface. At the same time, the second positioning convex ring 59 on the outer side surface of the elastic sealing ring 51 is snapped into the positioning ring groove 32 to achieve quick installation of this sealing mechanism.

[0034] In the structure of the quick-change oil and gas sealing system of the above-mentioned high-speed wire rod rolling mill, the quick-change oil and gas sealing bracket 3 composed of a radial ring and an axial ring can also be directly fixed to the outer side surface of the elastic sealing ring 51 forming the seal by screws, and its effect is the same as Figure 3 and Figure 4The effects of the structures are the same: that is, the radial ring 35 of the quick-change oil-gas seal support 3 is fixed to the elastic sealing ring 51, and its axial ring 36 forms an outer air flow groove 53 and an obliquely arranged high-pressure air flow blocking groove hole 54 on the inner side of the eccentric disc. Similarly, a swirling flow can be formed by the high-pressure oil and gas ejected from the folded air duct outlet 541 passing through the high-pressure air flow blocking groove hole 54, effectively preventing cooling water from entering the upper labyrinth.

Claims

1. A quick-change oil and gas sealing system, the structure of which includes a sealing mechanism composed of a sealing member formed by an elastic sealing ring (51) that can be sleeved in an eccentric disk, and upper and lower sealing rings (61, 62) sleeved on both sides thereof and forming upper and lower labyrinth mechanisms (66, 67) correspondingly; upper and lower wing structures (55, 56) capable of forming a sealing contact with the inner sides of the upper and lower sealing rings (61, 62) are arranged on the upper and lower sides of the elastic sealing ring (51). A radial inner-blowing oil and gas air duct (44) is arranged in the disk body of the eccentric disk; a number of high-pressure air-flow blocking slots (54) are arranged in the water-cooling direction on the inner circle forming the eccentric disk; its characteristics are as follows: On the side forming the upper labyrinth mechanism (66), the eccentric disk protrudes from the elastic sealing ring, and a high-pressure air-flow blocking slot (54) whose air duct outlet (541) is consistent with the side direction of the body of the elastic sealing ring (51) is formed between the two, that is, the high-pressure air-flow blocking slot is arranged in an "L"-shaped bend. The included angle α between the elbow (542) of the air duct outlet (541) forming the high-pressure air-flow blocking slot (54) and the radius of the sealing member is between 90 degrees and 180 degrees.

2. The quick-change oil and gas sealing system according to claim 1, wherein: The included angle α is a right angle of 90 degrees.

3. The quick-change oil and gas sealing system according to claim 1, characterized in that: A quick-change oil and gas sealing bracket is arranged between the elastic sealing ring (51) forming the sealing member and the eccentric disk. The quick-change oil and gas sealing bracket is composed of a radial ring (35) and an axial ring (36) vertically integrated therewith, that is, its cross-section is in a "T" or "L" shape; the quick-change oil and gas sealing bracket is fixed to the eccentric disk or the elastic sealing ring through its radial ring (35).

4. The quick-change oil and gas sealing system according to claim 3, characterized in that: The width of the elastic sealing ring (51) forming the sealing member is equal to the width of the eccentric disk (4); one end of the steel support ring (52) forming the sealing member protrudes from the outer ring surface of the elastic sealing ring (51) to form a first positioning convex ring (58); the quick-change oil and gas sealing bracket is fixed to the eccentric disk through a screw (31), and a positioning ring groove (32) corresponding to the first positioning convex ring (58) protruding from the outer side surface of the elastic sealing ring (51) is arranged on its upper side.

5. The quick-change oil and gas sealing system according to claim 3, wherein: One end of the steel support ring (52) forming the sealing member protrudes from the outer side surface of the elastic sealing ring (51) to form a second positioning convex ring (59); the quick-change oil and gas sealing bracket is fixed to the eccentric disk through a screw (31), and the quick-change oil and gas sealing bracket is provided with an outer ring (33), and a positioning ring groove (32) corresponding to the second positioning convex ring (59) protruding from the outer side surface of the elastic sealing ring (51) is arranged on the outer ring (33).

6. The quick-change oil and gas sealing system according to claim 1, wherein: Convex rings (63) are arranged on the inner sides of the upper and lower sealing rings (61, 62). Double-shoulder mechanisms (64) are arranged at the upper and lower ends of the elastic sealing ring forming the sealing member. A non-contact structure is formed between the double-shoulder mechanisms and the convex rings, so that a labyrinth structure is formed between the two.

7. The quick-change oil and gas sealing system according to claim 1, characterized in that: The width of the upper sealing ring (61) is greater than the width of the elastic sealing ring (51), and a gap (68) can be formed between the upper sealing ring and the eccentric disc.

8. The quick-change oil and gas sealing system according to claim 1, wherein: An outer air flow groove (53) corresponding to the inner oil and gas blowing air passage (44) is provided on the inner circle forming the eccentric disc.

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