阅读说明：本技术 冷轧机支撑辊成套装置 (Supporting roller complete device of cold rolling mill ) 是由 江东海 韩志勇 李强 张海东 刘延军 贾大朋 于 2021-02-01 设计创作，主要内容包括：本发明提供了一种冷轧机支撑辊成套装置,包括：轧辊、具有依次连接的辊身和辊颈,辊身和辊颈之间形成台阶面；径向轴承,套设在辊颈外；操作侧轴承座,套设在径向轴承的外侧,操作侧轴承座设置有第一油气孔；油气供给组件,与第一油气孔的入口连通；密封组件,设置在操作侧轴承座的一侧与台阶面之间,密封组件具有间隔设置的第二油气孔,第二油气孔的入口与第一油气孔的出口连接,第二油气孔的出口位于密封组件的内侧。本发明的有益效果是,通过油气供给组件经过第一油气孔和第二油气孔向设定位置注入油气混合物,能够使油气混合物进入操作侧轴承座腔体,并在腔体内循环后排出,能够带走部分热量,以降低径向轴承内部温度。(The invention provides a supporting roll complete device of a cold rolling mill, which comprises: the roller comprises a roller body and a roller neck which are sequentially connected, and a step surface is formed between the roller body and the roller neck; the radial bearing is sleeved outside the roll neck; the operating side bearing block is sleeved outside the radial bearing and provided with a first oil-gas hole; the oil gas supply assembly is communicated with the inlet of the first oil gas hole; the sealing assembly is arranged between one side of the bearing seat on the operation side and the step surface and is provided with second oil and gas holes arranged at intervals, the inlet of each second oil and gas hole is connected with the outlet of the corresponding first oil and gas hole, and the outlet of each second oil and gas hole is positioned on the inner side of the sealing assembly. The oil-gas supply assembly has the beneficial effects that the oil-gas mixture is injected into the set position through the first oil-gas hole and the second oil-gas hole by the oil-gas supply assembly, so that the oil-gas mixture can enter the bearing seat cavity on the operation side and is discharged after circulating in the cavity, and partial heat can be taken away, so that the internal temperature of the radial bearing is reduced.)

1. The utility model provides a cold rolling mill backing roll integrated equipment which characterized in that includes:

the roll comprises a roll (1), a roll body and a roll neck, wherein the roll body and the roll neck are sequentially connected, and a step surface is formed between the roll body and the roll neck;

the radial bearing (4) is sleeved outside the roll neck;

the operating side bearing block (2) is sleeved on the outer side of the radial bearing (4), and the operating side bearing block (2) is provided with a first oil-gas hole (21);

an oil and gas supply assembly (12) in communication with an inlet of the first oil and gas bore (21);

the seal assembly, set up in one side of operation side bearing frame (2) with between the step face, seal assembly has second oil gas hole (61) that the interval set up, and the entry and the exit linkage in first oil gas hole (21) of second oil gas hole (61), the export in second oil gas hole (61) is located seal assembly's inboard.

2. The cold rolling mill backup roll set according to claim 1, characterized in that the seal assembly comprises a first rotary oil seal (6) and a second rotary oil seal (7), the lip of the first rotary oil seal (6) facing the step surface, the lip of the second rotary oil seal (7) facing the operation side bearing block (2).

3. The cold rolling mill backup roll set of claim 2, characterized in that the first rotary oil seal (6) and the second rotary oil seal (7) are abutted, the second oil gas hole (61) comprises a transverse section and a longitudinal section, the abutment of the first rotary oil seal (6) and the second rotary oil seal (7) forms the longitudinal section, and the transverse section penetrates the second rotary oil seal (7) and is used for connecting the longitudinal section and the first oil gas hole (21).

4. The cold rolling mill backup roll set of claim 1, characterized in that the air and gas supply assembly (12) comprises:

the outlet of the oil-gas mixer (17) is connected with the inlet of the first oil-gas hole (21);

the quantitative oil ejector (16) is connected with a first inlet of the oil-gas mixer (17);

and the air supply pipeline (18) is connected with the second inlet of the oil-gas mixer (17).

5. A cold-rolling mill backup roll set according to claim 4, characterized in that the outlet of the air-oil mixer (17) is connected to the inlet of the first oil-gas hole (21) through an oil-gas lubrication line (11).

6. The supporting roll set device of the cold rolling mill according to claim 1, characterized in that the supporting roll set device of the cold rolling mill further comprises a cooling beam (20) of a roll body, the cooling beam is arranged at the roll body in parallel, a plurality of nozzles are arranged on the cooling beam (20) of the roll body at intervals, and the spraying direction of each nozzle faces to the outer wall of the roll body.

7. The cold rolling mill supporting roll set device according to claim 1, characterized in that the cold rolling mill supporting roll set device further comprises a bearing seat cooling beam (13) which is arranged outside the operation side bearing seat (2) in parallel, a plurality of nozzles are arranged on the bearing seat cooling beam (13) at intervals, and the spraying direction of each nozzle faces to the outer wall of the operation side bearing seat (2).

8. The supporting roll complete device of the cold rolling mill according to claim 1, characterized in that the roll (1) further comprises a small diameter section connected with the roll neck, the supporting roll complete device of the cold rolling mill further comprises a thrust bearing (5) and an end cover (10), the thrust bearing (5) is sleeved outside the small diameter section, and the end cover (10) is sleeved outside the thrust bearing (5) and is far away from one side of the step surface through the bearing block (2) on the operation side in an abutting mode.

9. Support roll arrangement according to claim 8, characterized in that the end cover (10) is provided with a gas discharge device (8) which communicates with the interior of the service-side bearing block (2).

10. The supporting roll set device of the cold rolling mill according to claim 8, characterized in that an oil drain port (14) and a dirt drain port (19) are further arranged on the end cover (10), the bottommost end of the oil drain port (14) is lower than the upper edge height of the lower roller of the radial bearing (4), and the bottommost end of the dirt drain port (19) is flush with the bottommost part of the radial bearing (4).

Technical Field

The invention relates to the technical field of cold rolling, in particular to a supporting roller complete device of a cold rolling mill.

Background

In the field of cold-rolled strip steel, cold-rolled nonferrous metal and alloy strip, the four-roller rolling mill and the six-roller rolling mill are widely applied to rolling strip at present. The common lubrication modes of the back-up roll bearing of the rolling mill are oil-gas lubrication and forced thin oil lubrication. Wherein oil-gas lubrication is commonly used for the unit with the speed of below 1350 m/min. For the unit with the speed higher than 1350m/min, the forced thin oil lubrication technology is adopted conventionally.

When the forced thin oil lubrication technology is adopted, three rotary oil seals are usually adopted to prevent the thin oil in the bearing seat cavity from leaking and prevent external emulsion and the like from entering the bearing seat cavity. Because the working environment is severe, the rotation speed of the roller is high, the rotating oil seal is easy to lose efficacy or damage, and lubricating oil in the bearing seat cavity leaks or external emulsion and the like enter the bearing seat cavity. Not only causes the surface quality of the product to be reduced, but also easily causes the bearing to be damaged, the emulsion to be deteriorated, the consumption of the lubricating oil to be increased rapidly and other adverse effects; not only increases the consumption of lubricating oil and emulsion, but also seriously influences the normal operation of the rolling mill. Meanwhile, the support rollers are complex to assemble and maintain, the workload is large, and the consumption of sealing elements and the like is large. As the requirements on the speed of the rolling mill become higher and higher, the problems become more and more serious, and great challenges are brought to the operation rate and the operation and maintenance of the whole unit.

When the conventional oil-gas lubrication is adopted, the problems of thin oil leakage, emulsion entering a bearing seat cavity and the like caused by forced thin oil lubrication can be effectively avoided. However, the oil-air lubrication system has a weak point of weak cooling capability. During high-speed rolling, the temperature of the bearing is high and exceeds the allowable normal use range of the bearing and lubricating oil. The oil-gas lubrication is only successfully applied to the lubrication of the bearing of the support roller of the rolling mill below 1350 m/min; no precedent for long-term stable application of the supporting roller bearing in a high-speed rolling mill (the speed is more than 1350m/min) exists.

Disclosure of Invention

The invention provides a supporting roller complete set device of a cold rolling mill, which aims to achieve the purpose of long-term stable application of a supporting roller bearing of a high-speed rolling mill.

The technical scheme adopted by the invention for solving the technical problems is as follows: a cold rolling mill back-up roll kit, comprising: the roller comprises a roller body and a roller neck which are sequentially connected, and a step surface is formed between the roller body and the roller neck; the radial bearing is sleeved outside the roll neck; the operating side bearing block is sleeved outside the radial bearing and provided with a first oil-gas hole; the oil gas supply assembly is communicated with the inlet of the first oil gas hole; the sealing assembly is arranged between one side of the bearing seat on the operation side and the step surface and is provided with second oil and gas holes arranged at intervals, the inlet of each second oil and gas hole is connected with the outlet of the corresponding first oil and gas hole, and the outlet of each second oil and gas hole is positioned on the inner side of the sealing assembly.

Further, the seal assembly includes a first rotary oil seal whose lip faces the step face and a second rotary oil seal whose lip faces the operation-side bearing housing.

Further, the butt of first rotatory oil blanket and the rotatory oil blanket of second, the oil gas hole of second includes horizontal section and vertical section, and the butt department of first rotatory oil blanket and the rotatory oil blanket of second forms vertical section, and horizontal section runs through the rotatory oil blanket of second and is used for connecting vertical section and first oil gas hole.

Further, the oil and gas supply assembly comprises: the outlet of the oil-gas mixer is connected with the inlet of the first oil-gas hole; the quantitative oil injector is connected with the first inlet of the oil-gas mixer; and the air supply pipeline is connected with the second inlet of the oil-gas mixer.

Further, the outlet of the oil-gas mixer is connected with the inlet of the first oil-gas hole through an oil-gas lubrication pipeline.

Furthermore, the supporting roll complete device of the cold rolling mill further comprises a roll body cooling beam which is arranged at the roll body in parallel, a plurality of nozzles are arranged on the roll body cooling beam at intervals, and the spraying direction of each nozzle faces to the outer wall of the roll body.

Furthermore, the cold rolling mill supporting roller complete device also comprises a bearing seat cooling beam which is arranged outside the operation side bearing seat in parallel, a plurality of nozzles are arranged on the bearing seat cooling beam at intervals, and the spraying direction of each nozzle faces to the outer wall of the operation side bearing seat.

Further, the roll still includes the path section of being connected with the roll neck, and cold rolling mill backing roll integrated equipment still includes thrust bearing and end cover, and the thrust bearing cover is established outside the path section, and the end cover is established outside the thrust bearing and is kept away from one side butt of step face with operation side bearing frame.

Further, an air discharging device communicated with the inner cavity of the bearing seat on the operation side is arranged on the end cover.

Furthermore, an oil drain port and a dirt discharge port are further formed in the end cover, the bottommost end of the oil drain port is lower than the upper edge height of the lower roller of the radial bearing, and the bottommost end of the dirt discharge port is flush with the bottommost end of the radial bearing.

The oil-gas supply assembly has the advantages that the oil-gas mixture is injected into the set position through the first oil-gas hole and the second oil-gas hole through the oil-gas supply assembly, the oil-gas mixture can enter the bearing seat cavity on the operation side and is discharged after circulating in the cavity, partial heat can be taken away, the internal temperature of the radial bearing is reduced, and the oil-gas supply assembly can be used for supporting the roller bearing of the high-speed rolling mill.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is a side view of fig. 1.

Reference numbers in the figures: 1. rolling; 2. an operation side bearing block; 3. a transmission side bearing block; 4. a radial bearing; 5. a thrust bearing; 6. a first rotary oil seal; 7. a second rotary oil seal; 8. an air release device; 9. water sealing; 10. an end cap; 11. oil-gas lubrication pipelines; 12. an oil and gas supply assembly; 13. a bearing block cooling beam; 14. an oil drainage port; 15. an oil supply pipe; 16. a quantitative oil injector; 17. an oil-gas mixer; 18. a gas supply line; 19. a sewage discharge port; 20. a roller body cooling beam; 21. a first oil and gas hole; 61. a second oil and gas hole.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

As shown in fig. 1 and 2, the embodiment of the invention provides a supporting roll kit of a cold rolling mill, which comprises a roll 1, a radial bearing 4, an operation side bearing seat 2, an oil-gas supply assembly 12 and a sealing assembly. The roller 1 is provided with a roller body and a roller neck which are connected in sequence, and a step surface is formed between the roller body and the roller neck; the radial bearing 4 is sleeved outside the roll neck; the operating side bearing block 2 is sleeved outside the radial bearing 4, and the operating side bearing block 2 is provided with a first oil-gas hole 21; the oil and gas supply assembly 12 is communicated with the inlet of the first oil and gas hole 21; the sealing assembly is arranged between one side of the bearing seat 2 on the operation side and the step surface, the sealing assembly is provided with second oil and gas holes 61 arranged at intervals, the inlet of each second oil and gas hole 61 is connected with the outlet of the corresponding first oil and gas hole 21, and the outlet of each second oil and gas hole 61 is positioned on the inner side of the sealing assembly.

Through the oil gas supply assembly 12 through first oil gas hole 21 and second oil gas hole 61 to the injected oil gas mixture of setting for the position, can make the oil gas mixture get into operation side bearing frame 2 cavity to discharge after the cavity internal circulation, take away partial heat simultaneously, with the inside temperature of reduction journal bearing 4, make this embodiment can be used for high-speed rolling mill support roller bearing.

The seal assembly includes a first rotary oil seal 6 and a second rotary oil seal 7, the lip of the first rotary oil seal 6 faces the step face, and the lip of the second rotary oil seal 7 faces the operation-side bearing housing 2. By utilizing the air pressure formed in the cavity of the bearing seat 2 on the operation side by the oil-gas supply assembly 12 and matching the first rotary oil seal 6 and the second rotary oil seal 7, external emulsion can be effectively prevented from entering the bearing seat 2 on the operation side, and the running state of the bearing is ensured to be good. Wherein the lip of the second rotary oil seal 7 faces the operation side bearing seat 2 and is mainly used for preventing lubricating oil in the cavity of the operation side bearing seat 2 from flowing out. The lip of the first rotary oil seal 6 faces the step surface and is mainly used for preventing external impurities from entering the cavity of the operation side bearing block 2.

Specifically, in this embodiment, the first rotary oil seal 6 abuts against the second rotary oil seal 7, the second oil and gas hole 61 includes a transverse section and a longitudinal section, the abutting position of the first rotary oil seal 6 and the second rotary oil seal 7 forms the longitudinal section, and the transverse section penetrates through the second rotary oil seal 7 and is used for connecting the longitudinal section and the first oil and gas hole 21.

Preferably, in this embodiment, a labyrinth ring (prior art) is disposed at the step surface, an installation space is formed between the first rotary oil seal 6 and the labyrinth ring, a water seal 9 is further disposed in the installation space, and the water seal 9 is disposed to further prevent external emulsion from entering the inside of the operation-side bearing housing 2, so as to ensure that the bearing has a good running state.

As shown in fig. 2, the oil and gas supply assembly 12 in the present embodiment includes an oil and gas mixer 17, a metering lubricator 16, and a gas supply line 18. The outlet of the oil gas mixer 17 is connected with the inlet of the first oil gas hole 21. The quantitative oil injector 16 is connected to a first inlet of an oil-gas mixer 17. The air supply line 18 is connected to a second inlet of the air-fuel mixer 17.

The lubricating oil provided by the quantitative oil injector 16 and the compressed air provided by the air supply pipeline 18 are mixed in the oil-air mixer 17 and enter the oil-air lubrication pipeline 11, so that the oil-air mixture is provided for lubrication and cooling in the embodiment, and the embodiment can be applied to high-speed rolling mill supporting roller bearings. The flow rate of the quantitative oil ejector 16 can be adjusted, and the flow rate adjusting valve provided on the air supply line 18 can also be used for adjusting the flow rate of the compressed air.

Preferably, the quantitative oil feeder 16 is connected to the oil supply tank through the oil supply pipe 15 for the purpose of continuous oil supply in the present embodiment.

As shown in fig. 1 and 2, the supporting roll set of the cold rolling mill in the embodiment of the present invention further includes a roll body cooling beam 20, which is arranged in parallel at the roll body, and a plurality of nozzles are arranged at intervals on the roll body cooling beam 20, and the spraying direction of each nozzle faces the outer wall of the roll body.

The cooling medium sprayed by the roller body cooling beam 20 can effectively take away the heat generated by the high-speed running of the bearing and transferred to the roller 1, thereby effectively reducing the running temperature of the bearing and ensuring the good running state of the bearing.

In the embodiment of the invention, roll necks are symmetrically connected to two sides of a roll body of a roll 1, wherein one roll neck is used for sleeving an operation side bearing seat 2, and a radial bearing 4 and a transmission side bearing seat 3 are sleeved at the other roll neck.

Preferably, the supporting roll set of the cold rolling mill further comprises a bearing seat cooling beam 13 which is arranged outside the operation-side bearing seat 2 and the transmission-side bearing seat 3 in parallel, a plurality of nozzles are arranged on the bearing seat cooling beam 13 at intervals, and the spraying direction of each nozzle faces to the outer wall of the corresponding operation-side bearing seat 2 or transmission-side bearing seat 3.

The cooling medium sprayed by the bearing seat cooling beam 13 can effectively take away the heat generated by the high-speed running of the bearing and transferred to the operation-side bearing seat 2 and the transmission-side bearing seat 3, thereby effectively reducing the running temperature of the operation-side bearing seat 2 and the transmission-side bearing seat 3 and ensuring the good running state of the bearing.

In the embodiment, the bearing seat cooling beam 13 and the roller body cooling beam 20 are connected to an emulsion liquid supply pipeline, and emulsion of a liquid supply system is used as a cooling medium; it can also be connected to cooling water pipeline or emulsion return pipeline, and the cooling water or emulsion return can be used as cooling medium. The bearing seat cooling beam 13 and the roller body cooling beam 20 can indirectly take away heat of a bearing cavity, and internal temperature can be effectively reduced.

As shown in fig. 1 and 2, the roll 1 further includes a small diameter section (the diameter is smaller than the diameter of the roll neck) connected with the roll neck, the cold rolling mill back-up roll complete set further includes a thrust bearing 5 and an end cover 10, the thrust bearing 5 is sleeved outside the small diameter section, and the end cover 10 is sleeved outside the thrust bearing 5 and is abutted against one side of the operation side bearing block 2 far from the step surface. The inlet of the first oil and gas bore 21 is provided in the end cover 10.

Further, an air bleeder 8 communicated with the inner cavity of the operation side bearing seat 2 is arranged on the end cover 10, and the air bleeder 8 can be an air overflow valve (with an overflow pressure of 0.05-0.1 bar) or can be a bent steel pipe so as to ensure smooth discharge of the pressure in the cavity of the operation side bearing seat 2 and compressed air. After the compressed air circulates in the cavity of the bearing seat 2 on the operation side, the compressed air is exhausted through the air exhausting device 8 and the sealing lip, and part of the heat of the bearing is taken away.

As shown in fig. 2, the end cover 10 is further provided with an oil drain port 14 and a dirt drain port 19, the lowermost end of the oil drain port 14 is lower than the upper edge height of the lower roller of the radial bearing 4, and the lowermost end of the dirt drain port 19 is flush with the lowermost end of the radial bearing 4.

The oil drain port 14 is not higher than the upper edge of the lowest roller of the radial bearing 4; an oil drain pipe is connected to the oil drain port 14 and is in a normally open state, so that a certain amount of lubricating oil is stored in the cavity of the operating side bearing block 2; when the lubricating oil is higher than the set position, the excessive lubricating oil is discharged, and the heating of the lubricating oil stirring when the bearing rotates at a high speed is reduced. The position height of the dirt discharge port 19 is flush with the bottommost part of the radial bearing 4; when the device works, the plug screw is used for plugging the drain port 19 so as to enable the device to be in a normally closed state when the device works; and when the rolling mill is overhauled, the screw plug is opened periodically, and oil stains and residues in the cavity of the operating side bearing seat 2 are discharged.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:

1. the air pressure formed by the oil-gas system in the cavity of the bearing seat on the operation side is utilized, and the oil seal and the water seal are rotated in a matching manner, so that external emulsion can be effectively prevented from entering the inside of the bearing seat on the operation side, and the good running state of the bearing is ensured.

2. The oil gas supply assembly adopts an accurate quantitative oil supply mode, and the amount of lubricating oil is extremely small; and, set up the oil discharge pipe in the lower part of the bearing end cap, can discharge surplus lubricating oil to the oil receiving barrel. The lubricating oil can be prevented from leaking into the emulsion to pollute the emulsion, and the rolling performance and the plate surface quality of the rolling mill are not influenced.

3. The gas supply pipeline of the oil-gas supply assembly is provided with a flow regulating valve, so that the gas flow can be regulated. The end cover is provided with an air bleeder, and after compressed air circulates in the bearing seat cavity on the operation side, the heat of the bearing can be taken away to reduce the temperature of the bearing.

4. Bearing seat cooling beams are arranged on two sides above the operation side bearing seat 2 and the transmission side bearing seat 3, and a roller body cooling beam is arranged on the side of the roller body. The cooling medium sprayed by the cooling beam can effectively take away the heat generated by the high-speed running of the bearing and transferred to the bearing seat and the roller, thereby effectively reducing the running temperature of the bearing and ensuring the good running state of the bearing.

5. A sewage discharge port is arranged below the end cover. When the bearing is periodically overhauled, the plug of the dirt discharge port is opened, residues accumulated in the bearing seat on the operating side after long-term operation can be discharged, and the cleanness of the cavity of the bearing seat on the operating side is ensured, so that the good running state of the bearing is ensured.

The above description is only exemplary of the invention and should not be taken as limiting the scope of the invention, so that the invention is intended to cover all modifications and equivalents of the embodiments described herein. In addition, the technical features, the technical schemes and the technical schemes can be freely combined and used.