阅读说明：本技术 板带冷轧机支撑辊装置 (Back-up roll device of plate strip cold rolling mill ) 是由 刘延军 张海东 韩志勇 于 2021-11-09 设计创作，主要内容包括：本发明为一种板带冷轧机支撑辊装置,包括轧辊和轴承座装配装置,轴承座装配装置包括径向轴承、轴承座、外端盖和内端盖,径向轴承套设在轧辊的其中一端的辊颈上。在轴承座的顶部内设有第一稀油润滑进油通道,在轴承座的内周面上开设有多圈第一环形油通道。在轴承座的底部内设有至少两条稀油润滑出油通道,各稀油润滑出油通道的通道直径总和为第一稀油润滑进油通道的通道直径的至少两倍。内端盖与辊颈之间形成有环形的密封腔,密封腔内设有油封,在内端盖内开设有油气进油通道,油气进油通道能与密封腔连通。本发明可以达到板带轧机在高速轧制时,负载最大的支撑辊装置能长期稳定可靠的运行的目的。(The invention relates to a plate strip cold rolling mill support roll device which comprises a roll and a bearing seat assembling device, wherein the bearing seat assembling device comprises a radial bearing, a bearing seat, an outer end cover and an inner end cover, and the radial bearing is sleeved on a roll neck at one end of the roll. A first thin oil lubricating oil inlet channel is arranged in the top of the bearing seat, and a plurality of rings of first annular oil channels are arranged on the inner circumferential surface of the bearing seat. At least two thin oil lubrication oil outlet channels are arranged in the bottom of the bearing seat, and the sum of the diameters of the channels of the thin oil lubrication oil outlet channels is at least twice of the diameter of the channel of the first thin oil lubrication oil inlet channel. An annular sealing cavity is formed between the inner end cover and the roll neck, an oil seal is arranged in the sealing cavity, an oil-gas oil inlet channel is formed in the inner end cover, and the oil-gas oil inlet channel can be communicated with the sealing cavity. The invention can achieve the aim that the supporting roller device with the largest load can stably and reliably operate for a long time when the plate and strip rolling mill rolls at high speed.)

1. A plate strip cold rolling mill backing roll device comprises a roll and a bearing block assembling device;

the bearing seat assembling device comprises a radial bearing, a bearing seat, an outer end cover and an inner end cover, wherein the radial bearing is sleeved on a roll neck at one end of the roll, the bearing seat is sleeved on the radial bearing, and the outer end cover is fixedly arranged at the outer side end of the bearing seat; the inner end cover is fixedly arranged at the inner side end of the bearing block and sleeved on the roll neck; it is characterized in that the preparation method is characterized in that,

a first thin oil lubricating oil inlet channel is arranged in the top of the bearing seat, a plurality of circles of first annular oil channels are arranged on the inner circumferential surface of the bearing seat, at least one circle of the first annular oil channels is communicated with the first thin oil lubricating oil inlet channel, and at least one circle of the first annular oil channels is communicated with an opening on the outer ring of the radial bearing; at least two thin oil lubrication oil outlet channels are arranged in the bottom of the bearing seat and are communicated with at least one circle of the first annular oil channel, and the sum of the diameters of the thin oil lubrication oil outlet channels is at least twice of the diameter of the first thin oil lubrication oil inlet channel; an annular sealing cavity is formed between the inner end cover and the roll neck, an oil seal is arranged in the sealing cavity, an oil and gas oil inlet channel is formed in the inner end cover, and the oil and gas oil inlet channel can be communicated with the sealing cavity.

2. A backup roll apparatus for a strip cold rolling mill according to claim 1,

and the outlet end of the thin oil lubrication oil outlet channel is connected with a thin oil lubrication oil outlet pipe, and a pull rod type quick-change connector is arranged on the thin oil lubrication oil outlet pipe.

3. A backup roll apparatus for a strip cold rolling mill according to claim 1,

two thin oil lubrication oil outlet channels are symmetrically arranged in the bottom of the bearing seat, and the axis direction of the thin oil lubrication oil outlet channels is parallel to the axis direction of the roller.

4. A backup roll apparatus for a strip cold rolling mill according to claim 1,

each thin oil lubrication oil outlet channel is communicated with one circle of the first annular oil channel positioned in the middle of the middle and two circles of the first annular oil channels positioned at the two ends.

5. A backup roll apparatus for a strip cold rolling mill according to claim 4,

the thin oil lubrication oil outlet channel is communicated with the corresponding first annular oil channel through an oil outlet branch channel arranged in the bottom of the bearing seat, and the width of the oil outlet branch channel communicated with the first annular oil channel in two circles at two ends is larger than that of the rest oil outlet branch channels.

6. A backup roll apparatus for a strip cold rolling mill according to claim 4,

the radial bearing is a four-row cylindrical roller bearing, five rings of first annular oil channels are arranged on the inner circumferential surface of the bearing seat, and the first thin oil lubrication oil inlet channel is communicated with three rings of first annular oil channels close to the middle.

7. A backup roll apparatus for a strip cold rolling mill according to claim 1,

a labyrinth ring is fixedly sleeved on the roll neck of the roll, a sealing cavity is formed between the inner peripheral surface of the inner end cover and the labyrinth ring, and two oil seals are arranged in the sealing cavity; the lip of the oil seal close to the radial bearing faces the radial bearing, the lip of the oil seal far away from the radial bearing is back to the radial bearing, and the oil and gas oil inlet channel can be communicated with the gap between the oil seals.

8. A backup roll apparatus for a strip cold rolling mill according to claim 7,

and a water seal is clamped between the end surface of the inner end cover and the labyrinth ring, and a lip of the water seal is tightly attached to the labyrinth ring.

9. A backup roll apparatus for a strip cold rolling mill according to claim 8,

and a stop ring is arranged on the end surface of the inner end cover and above the water seal, an annular groove is formed in the side surface of the labyrinth ring, and the stop ring can be inserted into the annular groove.

10. A backup roll apparatus for a strip cold rolling mill according to any one of claims 1 to 9,

a thrust bearing is arranged on the inner side of the outer end cover in a penetrating manner, and the thrust bearing is sleeved on the roller neck; a second thin oil lubrication oil inlet channel is arranged in the outer end cover, at least one circle of second annular oil channel is arranged on the inner circumferential surface of the outer end cover and is communicated with the second thin oil lubrication oil inlet channel, and at least one circle of second annular oil channel is communicated with an opening hole in the outer ring of the thrust bearing; and a horizontal channel is arranged in the bottom of the outer end cover and can be communicated with the thin oil lubrication oil outlet channel and the at least one circle of second annular oil channel.

11. A backup roll apparatus for a strip cold rolling mill according to claim 10,

the thrust bearing is a double-row tapered roller bearing, and a circle of second annular oil channel is arranged on the inner circumferential surface of the outer end cover.

12. A backup roll apparatus for a strip cold rolling mill according to claim 10,

and a thin oil lubrication oil inlet pipe is arranged outside the outer side cover and is communicated with the first thin oil lubrication oil inlet channel and the second thin oil lubrication oil inlet channel.

Technical Field

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

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 supporting roller device of the rolling mill has large load and high rotating speed, the supporting roller bearing is a key link influencing the stable rolling of the high-speed plate strip rolling mill, and the design of the adopted lubricating and cooling mode is of great importance for ensuring the good working condition of the supporting roller bearing.

Conventional oil-gas lubrication is adopted, a certain positive pressure exists in the cavity of the bearing seat, emulsion can be effectively organized to enter the cavity, the working environment of the support roller bearing is well protected, and the defect of poor cooling capacity exists. Because the lubricating oil quantity is low, the oil-gas lubrication can not meet the requirement of cooling the bearing of the supporting roller during high-speed rolling, exceeds the allowable normal use range of the bearing and the lubricating oil, and is not beneficial to the normal use of the bearing. At present, the oil-gas lubrication is only successfully applied to the bearing lubrication of the rolling mill supporting roller below 1350 m/min.

The forced thin oil lubrication technology has large lubricating oil amount, theoretically can effectively lubricate a support roller bearing and reduce the temperature of the bearing, but in practice, because the design of an oil inlet and outlet way of the support roller device is unreasonable, a large amount of lubricating oil left in a bearing seat cavity cannot be discharged in time, the temperature of the bearing is too high, and the aim of effectively reducing the temperature cannot be achieved; moreover, the amount of lubricating oil in the cavity of the bearing block is too large, so that a large amount of oil leaks from the rotary seal, emulsion and the quality of finished plate strips are polluted, the consumption of the lubricating oil and the emulsion is increased, and the normal operation of the rolling mill is seriously influenced. And because there is not positive pressure in the bearing frame cavity, emulsion easily gets into in the bearing frame cavity, leads to the bearing to damage, brings the backing roll assembly and maintains the problem such as complicacy, work load is big, consumption such as sealing member is big.

The high-speed strip cold rolling mill needs to stably run at a high speed, even reach a higher speed of 1500m/min, and the good working condition of the supporting roller bearing is important.

Therefore, the inventor provides a plate strip cold rolling mill supporting roller device by virtue of experience and practice of related industries for many years so as to overcome the defects in the prior art.

Disclosure of Invention

The invention aims to provide a back-up roll device of a plate and strip cold rolling mill, which can achieve the aim that the back-up roll device with the largest load can stably and reliably operate for a long time when the plate and strip cold rolling mill rolls at a high speed.

The invention aims to realize the purpose, and the plate strip cold rolling mill supporting roller device comprises a roller and a bearing block assembling device; the bearing block assembling device comprises a radial bearing, a bearing block, an outer end cover and an inner end cover, wherein the radial bearing is sleeved on a roll neck at one end of the roll, the bearing block is sleeved on the radial bearing, and the outer end cover is fixedly arranged at the outer side end of the bearing block; the inner end cover is fixedly arranged at the inner side end of the bearing block and sleeved on the roll neck; a first thin oil lubrication oil inlet channel is arranged in the top of the bearing seat, a plurality of circles of first annular oil channels are arranged on the inner circumferential surface of the bearing seat, at least one circle of first annular oil channels is communicated with the first thin oil lubrication oil inlet channel, and at least one circle of first annular oil channels is communicated with an opening on the outer ring of the radial bearing; at least two thin oil lubrication oil outlet channels are arranged in the bottom of the bearing seat and are communicated with at least one circle of first annular oil channels, and the sum of the diameters of the channels of the thin oil lubrication oil outlet channels is at least twice of the diameter of the channel of the first thin oil lubrication oil inlet channel; an annular sealing cavity is formed between the inner end cover and the roll neck, an oil seal is arranged in the sealing cavity, an oil-gas oil inlet channel is formed in the inner end cover, and the oil-gas oil inlet channel can be communicated with the sealing cavity.

In a preferred embodiment of the present invention, a thin oil lubrication oil outlet pipe is connected to an outlet end of the thin oil lubrication oil outlet passage, and a pull rod type quick-change connector is mounted on the thin oil lubrication oil outlet pipe.

In a preferred embodiment of the present invention, two thin oil lubrication oil outlet channels are symmetrically arranged in the bottom of the bearing seat, and the axial direction of the thin oil lubrication oil outlet channels is parallel to the axial direction of the roller.

In a preferred embodiment of the present invention, each of the thin oil lubrication oil outlet passages is communicated with one circle of the first annular oil passage located in the middle and two circles of the first annular oil passages located at both ends.

In a preferred embodiment of the present invention, the thin oil lubrication oil outlet channel is communicated with the corresponding first annular oil channel through an oil outlet branch channel formed in the bottom of the bearing seat, and the width of the oil outlet branch channel communicated with the two circles of first annular oil channels at the two ends is greater than the width of the remaining oil outlet branch channels.

In a preferred embodiment of the present invention, the radial bearing is a four-row cylindrical roller bearing, five rings of first annular oil passages are provided on the inner circumferential surface of the bearing housing, and the first thin oil lubrication oil inlet passage is communicated with three rings of first annular oil passages near the middle.

In a preferred embodiment of the invention, a labyrinth ring is sleeved and fixed on a roll neck of the roll, a sealing cavity is formed between the inner circumferential surface of the inner end cover and the labyrinth ring, and two oil seals are arranged in the sealing cavity; the lip of the oil seal close to the radial bearing is arranged towards the radial bearing, the lip of the oil seal far away from the radial bearing is arranged back to the radial bearing, and the oil gas inlet channel can be communicated with the gap between the two oil seals.

In a preferred embodiment of the present invention, a water seal is interposed between the end surface of the inner end cover and the labyrinth ring, and a lip of the water seal is tightly attached to the labyrinth ring.

In a preferred embodiment of the present invention, a blocking ring is disposed on the end surface of the inner end cover and above the water seal, and an annular groove is disposed on the side surface of the labyrinth ring, and the blocking ring can be inserted into the annular groove.

In a preferred embodiment of the invention, a thrust bearing is arranged on the inner side of the outer end cover in a penetrating way, and the thrust bearing is sleeved on the roll neck; a second thin oil lubrication oil inlet channel is arranged in the outer end cover, at least one circle of second annular oil channel is arranged on the inner circumferential surface of the outer end cover and is communicated with the second thin oil lubrication oil inlet channel, and the at least one circle of second annular oil channel is communicated with an opening on the outer ring of the thrust bearing; a horizontal channel is arranged in the bottom of the outer end cover and can be communicated with the thin oil lubrication oil outlet channel and the at least one circle of second annular oil channel.

In a preferred embodiment of the present invention, the thrust bearing is a double-row tapered roller bearing, and a circle of second annular oil passages are provided on the inner circumferential surface of the outer end cover.

In a preferred embodiment of the present invention, a thin oil lubrication inlet pipe is provided outside the outer cover, and the thin oil lubrication inlet pipe is communicated with both the first thin oil lubrication inlet passage and the second thin oil lubrication inlet passage.

According to the support roller device, a large amount of thin oil lubricating oil is independently supplied to the bearing seat, so that the bearing can be lubricated and cooled by a sufficient amount, the lubricating effect is good, heat generated by a high-speed heavy-load bearing can be taken away in a large amount, and the cooling requirement of the bearing when the roller runs at a high speed is met. The drift diameter of the first thin oil lubricating oil inlet channel and the thin oil lubricating oil outlet channel is effectively arranged, so that the oil outlet channel can be ensured to be large enough, a large amount of thin oil lubricating oil with heat in the bearing seat cavity can be discharged in time, and a better cooling effect is achieved. An oil seal is arranged in a sealing cavity between the inner end cover and the roll neck, and oil and gas are independently supplied to the inner end cover, so that the lubricating state of the oil seal can be improved, the high-speed roll rotation requirement of the strip rolling mill can be better met, and the service life of the oil seal is prolonged; meanwhile, a certain positive pressure is formed in the sealing cavity, so that emulsion outside the bearing seat can be effectively prevented from entering the bearing seat, and thin oil lubricating oil inside the bearing seat can be effectively prevented from leaking from the outside. The whole device adopts thin oil lubrication at the bearing seat, adopts oil-gas lubrication at the sealing position, and utilizes the combination mode of the thin oil lubrication and the oil-gas lubrication, thereby not only ensuring the lubrication and the cooling of the bearing during high-speed operation, but also preventing a large amount of oil leakage of the thin oil lubrication oil in the bearing seat at the rotary sealing position, ensuring that the strip rolling mill can reach faster speed and larger rolling force, being more beneficial to the high-speed stable operation of the strip rolling mill, and further achieving the purpose that the supporting roller device with the largest load can stably and reliably operate for a long time when the strip rolling mill rolls at high speed.

Drawings

The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention. Wherein:

FIG. 1: the invention provides a structure diagram of a backup roll device of a strip cold rolling mill.

FIG. 2: the invention provides a structure diagram of the matching of a bearing assembly device on an operating side and a roller.

FIG. 3: which is a partial enlargement at a in fig. 2.

FIG. 4: the invention provides a side view of a supporting roller device of a strip cold rolling mill.

FIG. 5: which is a cross-sectional view taken along the direction B-B in fig. 4.

FIG. 6: the invention provides a structure diagram of a bearing seat.

FIG. 7: is a cross-sectional view taken along the direction C-C in fig. 6.

FIG. 8: the invention provides a structure diagram of an inner end cover.

FIG. 9: which is a cross-sectional view taken along the direction D-D in fig. 8.

The reference numbers illustrate:

100. a bearing block assembling device; 101. an operating side bearing block assembling device; 102. a transmission side bearing block assembling device;

1. a radial bearing;

2. a bearing seat; 21. a first thin oil lubricates the oil inlet channel; 211. an oil inlet branch channel; 22. a first annular oil passage; 23. lubricating an oil outlet channel by using thin oil; 231. an oil outlet branch channel; 24. lubricating an oil outlet pipe by using thin oil; 241. a pull rod type quick change coupler;

3. an outer end cover; 31. a second thin oil lubricates the oil inlet channel; 32. a horizontal channel; 33. lubricating an oil inlet pipe with thin oil;

4. an inner end cap; 41. sealing the cavity; 411. oil sealing; 4111. a first oil seal; 4112. a second oil seal; 412. a spacer ring; 42. oil gas enters the oil channel; 421. oil-gas lubrication oil inlet pipe; 43. a support ring; 44. water sealing; 45. a blocking ring;

5. a labyrinth ring; 51. a first ring body; 511. an annular groove; 52. a second ring body;

6. a thrust bearing;

200. rolling; 201. a roll body; 202. a roll neck; 2021. a first roll neck; 2022. a second roll neck.

Detailed Description

In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings.

As shown in fig. 1 to 9, the embodiment provides a plate strip cold rolling mill support roller device, which includes a roller 200 and a chock assembly device 100, wherein the chock assembly device 100 includes a radial bearing 1, a chock 2, an outer end cap 3 and an inner end cap 4, the radial bearing 1 is sleeved on a roller neck 202 of one end of the roller 200, the chock 2 is sleeved on the radial bearing 1, and the outer end cap 3 is fixedly arranged at an outer end of the chock 2. The inner end cap 4 is fixedly arranged at the inner side end of the bearing pedestal 2 and sleeved on the roll neck 202.

A first thin oil lubrication oil inlet channel 21 is arranged in the top of the bearing seat 2, a plurality of circles of first annular oil channels 22 are arranged on the inner circumferential surface of the bearing seat 2, at least one circle of first annular oil channels 22 is communicated with the first thin oil lubrication oil inlet channel 21, and at least one circle of first annular oil channels 22 is communicated with an opening on the outer ring of the radial bearing 1. At least two thin oil lubrication oil outlet channels 23 are arranged in the bottom of the bearing seat 2, the thin oil lubrication oil outlet channels 23 are communicated with the at least one circle of first annular oil channels 22, and the sum of the channel diameters of the thin oil lubrication oil outlet channels 23 is at least twice of the channel diameter of the first thin oil lubrication oil inlet channel 21. An annular seal cavity 41 is formed between the inner end cover 4 and the roll neck 202, and an oil seal 411 is arranged in the seal cavity 41. An oil gas oil inlet channel 42 is formed in the inner end cover 4, and the oil gas oil inlet channel 42 can be communicated with the sealing cavity 41.

The roll 200 is composed of a roll body 201 and two roll necks 202 at both ends of the roll body 201, and the chock assembly 100 is mounted on one of the roll necks 202. The outer ring of the radial bearing 1 is provided with a plurality of circles of opening groups according to the number of rows of the rollers inside the radial bearing, each circle of opening group comprises a plurality of openings which are circumferentially arranged at intervals, and the partial first annular oil channels 22 are arranged opposite to the corresponding opening groups so as to be communicated with the openings in the circle of opening group.

During operation, the inner ring of the radial bearing 1 rotates with the roller 200, and the outer ring of the radial bearing 1, the bearing seat 2, the inner end cap 4, the outer end cap 3 and the oil seal 411 are all kept stationary. A large amount of thin oil lubricating oil is continuously pushed into the top of the bearing seat 2 through the first thin oil lubricating oil inlet channel 21, then enters the radial bearing 1 through the first annular oil channel 22, and enters the interior of the radial bearing 1 through the opening on the radial bearing 1 so as to cool and lubricate each roller in the radial bearing 1; the thin oil lubricant with heat then flows down, flows through the opening in the outer ring of the radial bearing 1 into the bottom of the first annular oil passage 22, and is then discharged through the thin oil lubricant outlet passage 23.

The thin oil lubricating oil herein means a lubricating oil having a relatively low viscosity (viscosity of 320mm or less)²The liquid lubricating oil of/s) has lower viscosity and stronger fluidity; and the thin oil is adopted for lubrication, so that the lubricating oil quantity is large, the bearing can be effectively lubricated, and the temperature of the bearing is reduced. Simultaneously, the channel diameter sum of each thin oil lubrication oil outlet channel 23 is at least twice of the channel diameter of the first thin oil lubrication oil inlet channel 21, so that the thin oil in the bearing seat 2 can be discharged quickly in time, and the bearing cannot be remained in the bearing seat 2 in a large amount, so that the bearing temperature is too high, and the effective cooling cannot be achieved. In addition, since the amount of lubricating oil lubricated by thin oil is too large, there may be a large risk of oil leakage at the rotary seal between the roll neck 202 and the inner end cap 4; in this embodiment, an oil seal 411 is arranged in a sealed cavity 41 formed by the inner end cover 4 and the roll neck 202, an oil-gas oil inlet channel 42 is arranged at the inner end cover 4, and oil gas can be injected into the sealed cavity 41 through the oil-gas oil inlet channel 42, so that on one hand, the oil seal 411 can be lubricated, the service life of the oil seal 411 is prolonged, and the sealing effect of the oil seal 411 on thin oil lubricating oil in the bearing seat 2 is ensured; on the other hand, the oil gas can form a certain positive pressure in the sealing cavity 41 to prevent the oil leakage of the thin oil lubricating oil in the cavity of the bearing seat 2.

From this, the backing roll device in this embodiment can carry out sufficient quantity lubrication and cooling to the bearing through supplying with a large amount of thin oil lubricating oil alone to bearing frame 2, and not only lubricated effectual, the heat that high-speed heavy load bearing produced can also be taken away in a large number, has satisfied the cooling needs of bearing when roll 200 high-speed operation. Through effectively setting up the latus rectum to first thin oil lubrication oil feed passageway 21 and thin oil lubrication oil outlet channel 23, can ensure that the oil outlet channel is enough big to a large amount of thin oil lubricating oil that have the heat in the 2 cavities of bearing frame can in time be discharged, reach better cooling effect. An oil seal 411 is arranged in a sealing cavity 41 between the inner end cover 4 and the roll neck 202, and oil and gas are independently supplied to the inner end cover 4, so that the lubricating state of the oil seal 411 can be improved, the rotation requirement of the high-speed roll 200 of the strip rolling mill can be better met, and the service life of the oil seal 411 is prolonged; meanwhile, a certain positive pressure is formed in the sealing cavity 41, so that emulsion outside the bearing seat 2 can be effectively prevented from entering the bearing seat 2, and thin oil lubricating oil inside the bearing seat 2 can be effectively prevented from leaking from the emulsion. The whole device adopts thin oil lubrication at the bearing seat 2, adopts oil-gas lubrication at the sealing position, and utilizes the combination mode of the thin oil lubrication and the oil-gas lubrication, thereby not only ensuring the lubrication and the cooling of the bearing during high-speed operation, but also preventing a large amount of oil leakage of the thin oil lubrication in the bearing seat 2 at the rotary sealing position, ensuring that the strip rolling mill can reach faster speed and larger rolling force, being more beneficial to the high-speed stable operation of the strip rolling mill, and further achieving the purpose that the supporting roller device with the largest load can stably and reliably operate for a long time when the strip rolling mill rolls at high speed.

In a specific implementation, as shown in fig. 5, a thin oil lubrication outlet pipe 24 is connected to an outlet end of the thin oil lubrication outlet passage 23, and a pull rod type quick-change connector 241 is mounted on the thin oil lubrication outlet pipe 24.

The drift diameter of the thin oil lubrication oil outlet pipe 24 is the same as that of the thin oil lubrication oil outlet channel 23. When in use, the external adapter (such as a hose) is directly inserted into the pull rod type quick-change connector 241, so that the thin oil lubricating oil can be sequentially recovered through the thin oil lubricating oil outlet pipe 24, the pull rod type quick-change connector 241 and the external adapter; when the pull rod type quick-change connector 241 is not used, the plug is used for plugging. The pull rod type quick-change connector 241 has the specific structure of the existing structure, is a pipeline connecting pipe fitting with a large inner diameter, and can reach the same inner diameter as the thin oil lubrication oil outlet channel 23; the drift diameter of the first thin oil lubrication oil inlet channel 21 and the thin oil lubrication oil outlet channel 23 is limited, so that the oil outlet channel is large enough, meanwhile, the pull rod type quick-change connector 241 is connected with an external connecting pipe, the drift diameter of the external connecting pipe is large enough, the inner diameter of the whole oil discharge channel is large enough, oil discharge is smooth, and a large amount of lubricating oil with heat in the bearing seat 2 is discharged more timely and rapidly.

For the number of the thin oil lubrication oil outlet channels 23, the space of the device, the diameter of the channel and other factors need to be considered comprehensively, as shown in fig. 5, in practical application, two thin oil lubrication oil outlet channels 23 are mostly symmetrically arranged in the bottom of the bearing pedestal 2, and the axial direction of the thin oil lubrication oil outlet channels 23 is parallel to the axial direction of the roller 200. Generally, the diameters of the two thin oil lubrication oil outlet channels 23 are larger than or equal to the diameter of the first thin oil lubrication oil inlet channel 21, that is, the diameter of the whole oil outlet channel is at least twice of the diameter of the oil inlet channel, so that thin oil lubrication oil in the bearing seat 2 is ensured to be discharged in time.

Further preferably, each thin oil lubrication oil outlet channel 23 is communicated with one circle of first annular oil channel 22 located in the middle and two circles of first annular oil channels 22 located at two ends, so that thin oil lubrication oil can be smoothly and timely discharged, meanwhile, thin oil lubrication oil can be discharged after passing through the outermost rollers in the radial bearing 1, and each row of rollers in the radial bearing 1 can be more fully lubricated and cooled by the thin oil lubrication oil.

For convenience of processing and installation, the thin oil lubrication oil outlet channel 23 is communicated with the corresponding first annular oil channel 22 through an oil outlet branch channel 231 provided in the bottom of the bearing housing 2. For example, as shown in fig. 5, when two thin oil lubrication oil outlet channels 23 are provided, two oil outlet branch channels 231 are symmetrically communicated with the bottom of the corresponding first annular oil channel 22, the oil outlet branch channels 231 are horizontally provided, the axis of the oil outlet branch channels is perpendicular to the axial direction of the roll 200, and the thin oil lubrication oil flows downward into the bottom of the first annular oil channel 22 and then is collected into the thin oil lubrication oil outlet pipe 24 through the oil outlet branch channels 231.

Since the amount of the thin oil lubrication oil flowing into both ends of the radial bearing 1 is increased, the width of the oil outlet branch passage 231 communicating with the two rings of the first annular oil passages 22 at both ends is larger than the width of the remaining oil outlet branch passages 231, so that it is ensured that the large amount of the thin oil lubrication oil at both ends of the radial bearing 1 can be discharged more quickly.

The number of turns of the first annular oil passage 22 may be determined as required, and generally, the number of turns of the first annular oil passage 22 is related to the number of rows of the rollers in the radial bearing 1, in this embodiment, it is preferable that the number of turns of the first annular oil passage 22 is two more than the number of rows of the rollers in the radial bearing 1, and each turn of the first annular oil passage 22 between two turns of the first annular oil passage 22 at the two ends is respectively arranged opposite to each turn of the opening group of the radial bearing 1. For example, in the present embodiment, the radial bearing 1 is a four-row cylindrical roller bearing to meet the requirements of bearing and installation space; accordingly, as shown in fig. 7, five rings of the first annular oil passages 22 are provided on the inner peripheral surface of the bearing housing 2, and the first thin oil lubrication oil inlet passage 21 communicates with the three rings of the first annular oil passages 22 near the center.

Because the four-row cylindrical roller bearing is provided with four rows of rollers, the outer ring of the bearing is provided with three circles of opening groups which respectively correspond to the gaps between two adjacent rows of rollers; therefore, when the five rings of first annular oil passages 22 are arranged, the three rings of first annular oil passages 22 close to the middle are respectively arranged right opposite to the three rings of opening groups, and the first thin oil lubricating oil inlet passage 21 is communicated with the three rings of first annular oil passages 22 close to the middle, so that the oil inlet is more uniform, and the quick oil inlet is realized. Generally, the first thin oil lubrication oil inlet channel 21 is horizontally arranged, and the axis of the first thin oil lubrication oil inlet channel 21 is parallel to the axis of the roller 200, and the first thin oil lubrication oil inlet channel 21 is respectively communicated with the corresponding first annular oil channels 22 through a plurality of oil inlet branch channels 211; the axis of the oil-intake branch passage 211 is perpendicular to the axis of the first thin-oil lubrication oil-intake passage 21. Two rings of first annular channels at the outermost ends of the five rings of first annular oil channels 22 and one ring of first annular oil channels 22 in the middle are communicated with the thin oil lubrication oil outlet channel 23 through corresponding oil outlet branch channels 231, the other two rings of first annular oil channels 22 are not communicated with the thin oil lubrication oil outlet channel 23, oil can be discharged smoothly and timely, rollers at the outermost sides can be fully lubricated and cooled, and the lubricating and cooling effects on all rows of rollers are guaranteed.

Further, as shown in fig. 2 and 3, a labyrinth ring 5 is fixedly fitted to a roll neck 202 of the roll 200, a seal chamber 41 is formed between an inner peripheral surface of the inner end cap 4 and the labyrinth ring 5, and two oil seals 411 are provided in the seal chamber 41. The lip of the oil seal 411 close to the radial bearing 1 is arranged towards the radial bearing 1, the lip of the oil seal 411 far away from the radial bearing 1 is arranged back to the radial bearing 1, and the oil gas oil inlet channel 42 can be communicated with the gap between the two oil seals 411.

The roll neck 202 is provided with an annular transition arc-shaped step surface close to the roll body 201, the labyrinth ring 5 is sleeved on the transition arc-shaped step surface and comprises a first ring body 51 and a second ring body 52 which are integrally formed, and the outer side surface of the first ring body 51 is approximately vertical to the outer side surface of the second ring body 52; the first ring body 51 can be attached to the end face of the roll body 201 and fixed to the roll body 201 by bolts, the second ring body 52 can be attached to the transition arc step face of the roll neck 202, and the end of the second ring body 52 is sealed against the end of the inner ring of the radial bearing 1. The inner end cover 4 is of an annular structure, the bearing pedestal 2 is of a cylindrical cavity structure with openings at two ends, and a first end face of the inner end cover 4 is closely attached to the inner side end face of the bearing pedestal 2 (namely, one end of the bearing pedestal 2 close to the roller body 201) and is fixed through a bolt; a certain gap is left between the inner peripheral surface of the inner end cap 4 and the outer side surface of the second ring body 52, and the inner peripheral surface of the inner end cap 4 is provided with a ring groove and forms the sealing cavity 41 with the outer side surface of the second ring body 52.

A separating ring 412 is further sleeved in the sealing cavity 41, the separating ring 412 abuts against the bottom of the ring groove, and a flow guide channel is formed in the separating ring 412 and is communicated with the oil and gas inlet channel 42 and the sealing cavity 41. The two oil seals 411 are respectively positioned at two sides of the separating ring 412, the separating ring 412 can separate the two oil seals 411, and the oil seals 411 are positioned by utilizing the groove wall of the ring groove and the separating ring 412. The oil seal 411 is a rotary oil seal, specifically a lip seal (existing structure), in this embodiment, the oil seal 411 is a single-lip oil seal, a lip of the first oil seal 4111 (i.e., the oil seal 411 far away from the radial bearing 1) is arranged back to the radial bearing 1, i.e., is arranged towards the roll body 201, and can prevent iron chips and emulsion entering from the outside from entering the bearing seat 2; the lip of the second oil seal 4112 (i.e., the oil seal 411 close to the radial bearing 1) is disposed toward the radial bearing 1, and thin oil lubrication oil in the bearing housing 2 can be prevented from leaking therefrom; the second oil seal 4112 is close to one side of the bearing seat 2 and is in contact with thin oil lubricating oil in the cavity of the bearing seat 2, so that the lubricating effect of the side face of the second oil seal 4112 can be ensured. During the use, can pour into the oil gas into the clearance between two oil blanket 411 through oil gas oil feed passageway 42, guarantee the lubricated effect to two oil blankets 411, and can form certain malleation.

Furthermore, a water seal 44 is interposed between the end face of the inner end cover 4 and the labyrinth ring 5, and a lip of the water seal 44 is in close contact with the labyrinth ring 5. A stop ring 45 is arranged on the end face of the inner end cover 4 and above the water seal 44, an annular groove 511 is formed in the side face of the labyrinth ring 5, and the stop ring 45 can be inserted into the annular groove 511.

Specifically, a support ring 43 and a stop ring 45 are arranged on a second end face (the second end face is arranged opposite to the first end face) of the inner end cover 4, and the stop ring 45 is positioned outside the support ring 43; the water seal 44 is specifically an end face seal ring (existing structure), the water seal 44 is sleeved on the support ring 43, and a lip of the water seal 44 contacts with the outer side face of the first ring body 51 to block iron chips and emulsion entering from the outside. The blocking ring 45 extends into the annular groove 511 and also serves to block part of the iron chips and the emulsion.

During the use of the roller 200, the emulsion is required to be sprayed on the surface of the roller 200 to cool and lubricate the roller 200. Scrap iron and the like can be generated in the processing process of the workpiece, and the scrap iron and the like can easily enter the cavity of the bearing seat 2 under the carrying of the emulsion, so that the abrasion of the radial bearing 1 can be accelerated, and the operation of the roller 200 is influenced. In this embodiment, the cooperation of the blocking ring 45 and the annular groove 511 is a first barrier for blocking part of the iron chips and the emulsion; the water seal 44 is arranged to be a second barrier for blocking the scrap iron and the emulsion entering from the outside; the first oil seal 4111 is used as a third barrier for blocking scrap iron and emulsion entering from the outside; a certain positive pressure can be formed at the gap between the two oil seals 411 by injecting oil gas into the gap, so that a fourth barrier for blocking the scrap iron and the emulsion entering from the outside is formed; the combined action of the four barriers can more effectively prevent the emulsion of the external iron chips from entering the cavity of the bearing block 2 from the gap between the inner end cover 4 and the roller 200.

By the action of the second oil seal 4112, the oil leakage of the thin oil lubricating oil in the cavity of the bearing seat 2 can be prevented. However, the lip of the first oil seal 4111 contacting the roller 200 cannot be lubricated sufficiently due to the blocking effect of the second oil seal 4112 on the thin oil lubricant, and the first oil seal 4111 is very easy to be damaged. In this embodiment, an oil-gas oil inlet channel 42 is arranged in the inner end cover 4, and the outer end of the oil-gas oil inlet channel 42 is connected with an oil-gas lubricating oil inlet pipe 421; oil gas that outside supplied with passes through oil gas lubrication oil inlet pipe 421, enter into first oil blanket 4111 and second oil blanket 4112's middle cavity again through oil gas oil feed passageway 42, carry out independent lubrication to first oil blanket 4111 and second oil blanket 4112's lip, improve first oil blanket 4111 and second oil blanket 4112's life, and form certain malleation here, form one protective screen of the inside thin oil lubricating oil of separation outside emulsion and 2 cavitys of bearing frame, prevent more effectively that the thin oil lubricating oil in the 2 cavitys of bearing frame from leaking from the gap department of interior end cover 4 and roll 200, guarantee that thin oil lubricating oil 241 only discharges by pull rod formula quick-change coupler.

Further, the entire strip cold mill support roll apparatus actually includes a roll 200 (also referred to as a support roll) and two chock assemblies 100, one of the chock assemblies 100 being an operation-side chock assembly 101 and the other of the chock assemblies 100 being a transmission-side chock assembly 102. The two bearing housing assembling devices 100 are respectively installed on two roll necks 202 of a roll 200, the structure of the two bearing housing assembling devices is mainly different in that a thrust bearing 6 is also arranged in an operation-side bearing housing assembling device 101, the structure of a transmission-side bearing housing assembling device 102 is basically the same as that of the operation-side bearing housing assembling device 101 except that the thrust bearing 6 and the components related to the thrust bearing 6 are not arranged, and the related components for performing thin oil lubrication on a radial bearing 1, such as a first thin oil lubrication oil inlet channel 21 on the transmission-side bearing housing assembling device 102, are not shown in fig. 1.

For the bearing block assembly 101 on the operating side, a thrust bearing 6 is also provided inside, specifically: as shown in fig. 2, a thrust bearing 6 is inserted into the inner side of the outer end cover 3, and the thrust bearing 6 is sleeved on the roll neck 202. A second thin oil lubrication oil inlet channel 31 is arranged in the outer end cover 3, at least one circle of second annular oil channel is arranged on the inner circumferential surface of the outer end cover 3 and communicated with the second thin oil lubrication oil inlet channel 31, and at least one circle of second annular oil channel is communicated with an opening on the outer ring of the thrust bearing 6. A horizontal channel 32 is arranged in the bottom of the outer end cover 3, and the horizontal channel 32 can be communicated with the thin oil lubrication oil outlet channel 23 and at least one circle of second annular oil channels.

The roll neck 202 for mounting the bearing seat assembly device 101 on the operation side comprises a first roll neck 2021 and a second roll neck 2022, the diameter of the first roll neck 2021 is larger than that of the second roll neck 2022, the radial bearing 1 is sleeved on the first roll neck 2021, and the thrust bearing 6 is sleeved on the second roll neck 2022. When the roller cooling device works, the inner ring of the thrust bearing 6 rotates along with the roller 200, a large amount of thin oil lubricating oil can enter the thrust bearing 6 through the second thin oil lubricating oil inlet channel 31 and enter the thrust bearing 6 through the opening on the thrust bearing 6 so as to cool and lubricate each roller in the thrust bearing 6; then, the thin oil lubricant with heat flows down, flows into the bottom of the second annular oil passage through the opening on the outer ring of the thrust bearing 6, then flows into the gap between the outer end cover 3 and the first roll neck 2021 through the horizontal passage 32, flows into the thin oil lubricant outlet passage 23, and is discharged.

In this embodiment, the thrust bearing 6 preferably adopts a double-row tapered roller bearing, which can meet the requirement of bearing capacity and occupies a small space. Generally, a circle of second annular oil channels are arranged on the inner circumferential surface of the outer end cover 3 to satisfy the lubricating and cooling effects on the thrust bearing 6. Because the double-row tapered roller bearing is provided with two rows of rollers, a circle of open pore groups are arranged on the outer ring of the bearing and correspond to the clearance between the two rows of rollers; the ring of second annular oil passages is arranged opposite to the ring of opening groups.

In addition, a thin oil lubrication oil inlet pipe 33 is arranged outside the outer cover, and the thin oil lubrication oil inlet pipe 33 is communicated with both the first thin oil lubrication oil inlet passage 21 and the second thin oil lubrication oil inlet passage 31. A large amount of thin oil lubricating oil can be continuously conveyed to the position of the radial bearing 1 and the position of the thrust bearing 6 through the thin oil lubricating oil inlet pipe 33, and the radial bearing 1 and the thrust bearing 6 are lubricated and cooled. It is understood that the outer end cap 3 in the operation-side bearing housing assembling device 101 is a cylindrical structure with one open end, and the open end is sealingly fixed on the outer end face of the bearing housing 2.

In summary, the backup roll device in this embodiment is a backup roll device that satisfies the requirements of a high-speed cold rolling mill, thin oil lubrication is adopted at a bearing, a first thin oil lubrication oil inlet channel 21 and at least two thin oil lubrication oil outlet channels 23 are formed in a bearing seat 2, and a pull rod type quick-change connector 241 is installed on a thin oil lubrication oil outlet pipe 24 and used for externally connecting an external lubrication oil conveying pipeline for lubricating oil recovery; the cooling and lubricating effect of the bearing can be met when the roller 200 runs at a high speed, the inner diameter of the whole oil outlet channel is large enough, and thin oil lubricating oil with heat can be discharged quickly in time. The smooth oil discharge of the thin oil lubricating oil in the cavity of the bearing seat 2 can ensure that the heat generated by the high-speed rotation of the bearing in the cavity of the bearing seat 2 can be taken away in time, and the thin oil lubricating oil can not leak at the contact positions of the first rotating oil seal 411 and the second oil seal 4112 with the roller 200.

A blocking ring 45, a water seal 44 and two oil seals 411 are arranged between the inner end cover 4 and the roller 200, oil and gas lubrication is adopted, oil and gas enter the two oil seals 411 through an oil and gas lubrication oil inlet pipe 421 and an oil and gas inlet channel 42 and are used for independently lubricating the two oil seals 411, a certain positive pressure is formed between the two oil seals 411, and emulsion outside the bearing seat 2 and thin oil lubricating oil inside the bearing seat are ensured to be thoroughly separated; and the first oil seal 4111, the water seal 44 and the blocking ring 45 play a role in preventing emulsion from entering the cavity of the bearing seat 2, and the second oil seal 4112 plays a role in preventing lubricating oil in the cavity of the bearing seat 2 from leaking out. The whole device adopts thin oil lubrication at the bearing, adopts oil-gas lubrication at the rotary seal, limits the diameter of the channel and is matched with the pull rod type quick-change connector 241, so that the thin oil lubricating oil has a large enough drift diameter when being discharged, the thin oil lubricating oil is ensured to flow away quickly, and the long-term stable and reliable operation of the support roller device can be ensured when the strip rolling mill rolls at a high speed.

The above are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention. Any equivalent changes and modifications that can be made by one skilled in the art without departing from the spirit and principles of the invention should fall within the protection scope of the invention.