CN206694436U - Oil-gas lubrication structure of rolling mill working roll bearing seat - Google Patents

Abstract

The utility model relates to an oil-air lubricating structure for a work roll bearing seat of a rolling mill, which comprises: an operating side bearing seat, the outer side of which is provided with a first inlet joint, the inner side is provided with a first end cover, and the first end cover is provided with a first Rotary shaft seal, the first distributor connected to the first inlet joint is arranged in the bearing seat on the operating side, and the first distributor supplies the first bearing and the first rotary shaft seal in the bearing seat on the operating side through a plurality of lubrication channels For oil and gas, a connecting pipe runs through the bearing seat on the operation side; the bearing seat on the transmission side has a second inlet joint and a second end cover inside, the second inlet joint is connected to the connecting pipe, and the second end cover is provided with a second rotating shaft There is a second distributor connected to the second inlet joint in the transmission side bearing seat, and the second distributor supplies oil and gas to the second bearing and the second rotary shaft seal in the transmission side bearing seat respectively through a plurality of lubricating passages. The utility model can realize comprehensive lubrication and sealing, prevent oil and gas leakage, facilitate roll changing operation, and have high efficiency.

Description

Oil and air lubrication structure of work roll bearing seat of rolling mill

technical field

The utility model relates to the field of oil-air lubrication for metallurgical machinery, in particular to an oil-air lubrication structure for a work roll bearing seat of a rolling mill.

Background technique

The work roll of the cold rolling mill is an important part in the rolling mill. The roll change operation of the work roll is relatively frequent, and the bearing housing of the work roll needs to be lubricated with oil and air. The existing bearing housing of the working roll is divided into the operation side bearing housing and The transmission side bearing seat is equipped with various joints for oil-air lubrication. The work roll can be disassembled and installed between the operation side bearing seat and the transmission side bearing seat. However, the oil-air lubrication of the transmission side bearing seat of the existing structure The joints are easily blocked by other mechanical structures such as brackets, which causes inconvenience in the roll changing operation. Moreover, the existing structure of the work roll bearing seat of the rolling mill also has the disadvantages that oil and gas are easy to leak and cannot achieve comprehensive lubrication and sealing.

In view of the above-mentioned problems in the prior art, the inventors combined years of experience in design and use in related manufacturing fields to provide an oil-air lubrication structure for work roll chocks of rolling mills to overcome the above-mentioned defects.

Utility model content

The purpose of the utility model is to provide an oil-air lubrication structure for the work roll bearing seat of a rolling mill, which can realize comprehensive lubrication and sealing, prevent oil-air leakage, facilitate roll changing operations, and have high work efficiency.

Above-mentioned purpose of the utility model can adopt following technical scheme to realize:

The utility model provides an oil-air lubrication structure for a work roll bearing seat of a rolling mill, which comprises: an operation side bearing seat, a first inlet joint is arranged on the outside, a first end cover is arranged on the inside, and a first end cover is arranged inside the first end cover. The first rotary shaft seal, a first distributor connected to the first inlet joint is arranged in the bearing seat on the operating side, and the first distributor passes through a plurality of lubrication passages arranged in the bearing seat on the operating side Supply oil and gas to the multi-row first bearings and the first rotary shaft seal in the operation-side bearing seat respectively, and a connecting pipe runs through the operation-side bearing seat; the transmission-side bearing seat has a second inlet joint installed inside it and the second end cover, the second inlet joint is connected with the communication pipe, the second end cover is provided with a second rotary shaft seal, and the transmission side bearing housing is provided with the second inlet joint The connected second distributor, the second distributor supplies multiple rows of second bearings and the second rotating shaft in the transmission side bearing housing respectively through a plurality of lubricating passages arranged in the transmission side bearing housing. Sealed supply of oil and gas.

In a preferred embodiment, the plurality of lubricating passages in the bearing seat on the operating side include a first shaft seal lubricating passage and a plurality of first bearing lubricating passages, one end of the first shaft seal lubricating passage is connected to the first A rotary shaft seal is connected, the other end of the first shaft seal lubricating channel is connected to the end of the first distributor away from the first inlet joint, and multiple first bearing lubricating channels are connected side by side to the first Between two ends of a distributor, the end of the first bearing lubricating channel away from the first distributor is located between two adjacent rows of the first bearings.

In a preferred embodiment, the first shaft seal lubricating channel is provided with a first pin cylinder, the first pin cylinder is located at the inner end surface of the operation side bearing seat, and the first pin cylinder is provided with first inner through hole.

In a preferred embodiment, first sealing rings are respectively provided between the two ends of the first pin cylinder and the inner wall surface of the first shaft seal lubricating passage.

In a preferred embodiment, a four-row tapered roller type first bearing and three first bearing lubricating passages are arranged in the operating side bearing housing.

In a preferred embodiment, the plurality of lubricating passages in the transmission side bearing seat include a second shaft seal lubricating passage and a plurality of second bearing lubricating passages, one end of the second shaft seal lubricating passage is connected to the first lubricating passage The two rotary shaft seals are connected, the other end of the second shaft seal lubricating channel is connected to the second distributor, a plurality of the second bearing lubricating channels are connected side by side to the second distributor and connected to the second Shaft seal lubrication channel interval setting.

In a preferred embodiment, a second pin cylinder is provided in the second shaft seal lubricating channel, the second pin cylinder is located at the inner end surface of the transmission side bearing housing, and the second pin cylinder is provided with the second inner through hole.

In a preferred embodiment, second sealing rings are respectively provided between the two ends of the second pin cylinder and the inner wall surface of the second shaft seal lubricating passage.

In a preferred embodiment, the second bearing of the four-row tapered roller type and three lubrication passages for the second bearing are arranged in the bearing seat on the transmission side.

In a preferred embodiment, the outer end surface of the bearing seat on the operating side is provided with a first installation port that can pass through the first distributor, and the first inlet joint is screwed to the first installation port; the The inner end surface of the transmission-side bearing seat is provided with a second installation opening through which the second distributor can pass, and the second inlet joint is screwed to the second installation opening.

The characteristics and advantages of the oil-air lubrication structure of the work roll bearing seat of the rolling mill of the utility model are:

1. In the utility model, a first shaft seal lubrication passage and multiple first bearing lubrication passages are provided in the bearing seat on the operating side, and a second shaft seal lubrication passage and multiple second bearing lubrication passages are provided in the transmission side bearing seat. , through the first distributor and the second distributor to achieve multiple rows of first bearings and first rotary shaft seals in the bearing seat on the operating side and multiple rows of second bearings and second rotary shaft seals in the bearing seat on the transmission side Distribute and supply oil and gas for lubrication, realize comprehensive oil and gas lubrication and supply control for bearings and shaft seals of work roll bearing housings in rolling mills, ensure good working conditions, and reduce troubleshooting;

2. The utility model is provided with a first pin barrel in the first shaft seal lubricating channel, a second pin barrel in the second shaft seal lubricating channel, and lubricated with the first shaft seal at both ends of the first pin barrel. Sealing rings are respectively provided between the inner wall surfaces of the channels, between the two ends of the second pin cylinder and the inner wall surfaces of the second shaft seal lubricating channel, so as to prevent the The oil and gas leakage between the second end cover and the inner end surface of the transmission side bearing seat, as well as the two ends of the first pin cylinder and the second pin cylinder, ensures the sealing;

3. The utility model passes through the connecting pipe in the bearing seat on the operation side and connects with the second inlet joint of the bearing seat on the transmission side to realize the plugging and unplugging of the joints of the bearing seat on the operation side and the bearing seat on the transmission side on the operation side, which is convenient Realize roll changing operation, improve work efficiency and save labor cost.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some implementations of the present invention. For example, those of ordinary skill in the art can also obtain other drawings based on these drawings on the premise of not paying creative efforts.

Fig. 1 is the schematic structural diagram of the front view of the oil-air lubrication structure of the work roll chock of the rolling mill of the present invention;

Fig. 2 is a side view of the bearing seat on the transmission side of the oil-air lubrication structure of the work roll bearing seat of the rolling mill of the utility model;

Fig. 3 is a side view of the bearing seat on the operating side of the oil-air lubrication structure of the work roll bearing seat of the rolling mill of the utility model;

Fig. 4 is a schematic diagram of the front view of the bearing seat on the operating side of the oil-air lubrication structure of the work roll bearing seat of the rolling mill according to the utility model.

Explanation of reference numbers:

100 Operation side bearing housing, 101 First inlet joint, 102 Inner end face, 103 Outer end face, 104 First distributor, 105 First bearing, 106 First sealing screw plug, 107 First end cover, 108 First rotary shaft seal , 109 first bearing lubrication passage, 110 first shaft seal lubrication passage, 111 first pin cylinder, 112 first sealing ring, 113 first installation port, 114 through hole, 115 connecting pipe;

200 transmission side bearing seat, 201 second inlet joint, 202 inner end face, 203 outer end face, 204 second distributor, 205 second bearing, 206 second sealing screw plug, 207 second end cover, 208 second rotary shaft seal , 209 second bearing lubrication channel, 210 second shaft seal lubrication channel, 211 second pin cylinder, 212 second sealing ring, 213 second installation port.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

As shown in Figures 1 to 4, the utility model provides an oil-air lubrication structure for the work roll bearing seat of a rolling mill, which includes: the operating side bearing seat 100, a first inlet joint 101 is provided on the outside, and a first end is provided on the inside Cover 107, the first end cover 107 is provided with a first rotary shaft seal 108, the operating side bearing seat 100 is provided with a first distributor 104 connected to the first inlet joint 101, the first The distributor 104 supplies oil and gas to the multiple rows of first bearings 105 in the operation-side bearing housing 100 and the first rotary shaft seal 108 respectively through a plurality of lubricating passages provided in the operation-side bearing housing 100. A communication pipe 115 runs through the operation side bearing seat 100; the transmission side bearing seat 200 has a second inlet joint 201 and a second end cover 207 inside, the second inlet joint 201 is connected to the communication pipe 115, the A second rotary shaft seal 208 is provided in the second end cover 207, and a second distributor 204 connected to the second inlet joint 201 is provided in the transmission side bearing seat 200, and the second distributor 204 is configured by The multiple lubricating passages in the transmission side bearing housing 200 respectively supply oil and gas to the rows of second bearings 205 in the transmission side bearing housing 200 and the second rotary shaft seal 208 .

Specifically, as shown in FIGS. 1 and 4 , the operating side bearing seat 100 has an opposite inner end surface 102 and an outer end surface 103 , the transmission side bearing seat 200 has an opposite inner end surface 202 and an outer end surface 203 , and the operating side bearing seat 100 The inner end surface 102 and the inner end surface 202 of the transmission side bearing seat 200 face each other and have a distance. The second end cover 207 is provided, and the first end cover 107 is arranged opposite to the second end cover 207 to load and unload the work roll; the operation side bearing seat 100 is provided with a through hole 114, and the communication pipe 115 is penetrated in the through hole 114 to penetrate In the bearing housing 100 on the operating side, the connecting pipe 115 is arranged in a staggered manner with the first distributor 104 in the bearing housing 100 on the operating side, and is arranged opposite to the second distributor 204 of the bearing housing 200 on the driving side, so that one end passes through the operating side The bearing seat 100 is connected to the second inlet joint 201 of the transmission-side bearing seat 200, and the other end passes through the operation-side bearing seat 100 and is connected to the supply pipeline through a quick-change joint to realize the supply of oil and gas to the second distributor 204, and It is convenient to control the quick-change joint on the operation side to realize the quick loading and unloading and communication of the connecting pipe 115, avoiding the impact on the roll changing operation; wherein, the structures of the first distributor 104 and the second distributor 204 are all known technologies , which will not be repeated here.

Further, as shown in Fig. 3 and Fig. 4, the multiple lubricating passages in the operating side bearing seat 100 include a first shaft seal lubricating passage 110 and a plurality of first bearing lubricating passages 109, the first shaft seal One end of the lubricating passage 110 communicates with the first rotary shaft seal 108, and the other end of the first shaft seal lubricating passage 110 connects with the end of the first distributor 104 away from the first inlet joint 101, a plurality of The first bearing lubricating channels 109 are connected side by side between the two ends of the first distributor 104, and the ends of the first bearing lubricating channels 109 away from the first distributor 104 are located in two adjacent rows. Between the above-mentioned first bearings 105, oil and gas are supplied to the first bearings 105 on both sides for lubrication. Specifically, the first distributor 104 is generally in the shape of a long tube. In the direction from 103 to the inner end surface 102, a plurality of branch ports are sequentially arranged at intervals, and the distance between two adjacent branch ports depends on the distance between the internal lubricating passages of the four-row tapered roller type first bearing 105. In most cases The distance between two adjacent branch ports is equal, the first shaft seal lubricating channel 110 is connected to the end of the first distributor 104, and is generally linear, that is, the first shaft seal lubricating channel 110 starts from the first The end of the distributor 104 extends and extends into the first end cover 107 through the inner end surface 102 , that is, the first shaft seal lubricating channel 110 extends along the axial direction of the first distributor 104 to supply oil and gas to the first rotary shaft seal 108 , a plurality of first bearing lubricating channels 109 are respectively connected to each branch port of the first distributor 104, and extend radially to each first bearing 105, so as to provide each first bearing in the operating side bearing housing 100 105 supplies oil and gas, that is, the first shaft seal lubrication passage 110 and the first bearing lubrication passage 109 are not connected to each other, but are only connected to the first distributor 104, which not only facilitates the processing operation of the lubrication passage, but also realizes the first distribution The device 104 respectively supplies oil and gas to a first shaft seal lubricating passage 110 and a plurality of first bearing lubricating passages 109 to respectively lubricate the first rotary shaft seal 108 and the plurality of first bearings 105 .

Furthermore, as shown in FIG. 4 , the first shaft seal lubricating channel 110 is provided with a first pin cylinder 111 , and the first pin cylinder 111 is located at the inner end surface 102 of the operation side bearing seat 100 , so that The first pin cylinder 111 is provided with a first inner through hole, and a first sealing ring 112 is respectively provided between the two ends of the first pin cylinder 111 and the inner wall surface of the first shaft seal lubrication passage 110, specifically Yes, the first pin barrel 111 is generally in the shape of a cylinder, and the axial direction of the first pin barrel 111 is perpendicular to the inner end surface 102 of the operation side bearing seat 100, that is, the first pin barrel 111 is respectively on the inner side end surface 102 of the operation side bearing seat. 100 and the first end cover 107 are bidirectionally extended to avoid oil and gas leakage at the joint surface, and at the same time, O-shaped first sealing rings 112 are respectively arranged at the two ends of the first pin cylinder 111 to avoid oil and gas leakage in the first pin cylinder. Leakage occurs at the end of 111 to ensure sealing.

Preferably, as shown in Figure 4, the first bearing 105 of the four-row tapered roller type and three first bearing lubrication passages 109 are provided in the operating side bearing housing 100, and the three first bearing lubrication channels 109 are provided. Channels 109 are arranged alternately with four-row tapered roller-type first bearings 105, that is, each first bearing lubrication channel 109 extends between adjacent two-row tapered roller-type first bearings 105, and provides lubrication for them. , wherein one end of the first bearing lubricating channel 109 radially penetrates the bearing housing 100 on the operating side to facilitate the hole opening operation in the process, and the first sealing screw plug 106 is plugged at its end to seal the process hole to avoid leakage .

Further, as shown in FIG. 1 , the multiple lubricating passages in the transmission side bearing housing 200 include a second shaft seal lubricating passage 210 and a plurality of second bearing lubricating passages 209, and the second shaft seal lubricating passage 210 One end of the shaft seal is connected to the second rotary shaft seal 208, the other end of the second shaft seal lubrication passage 210 is connected to the second distributor 204, and a plurality of the second bearing lubrication passages 209 are connected side by side to the The second distributor 204 is spaced apart from the second shaft seal lubricating passage 210. Specifically, the second distributor 204 is generally in the shape of a long tube, and the second distributor 204 is from the inner end surface 202 of the transmission side bearing seat 200 to the outer end surface. The direction of 203 is successively provided with a plurality of branch ports at intervals, and the distance between two adjacent branch ports can be set to be equal, or can be set to be unequal according to the internal space. The second shaft seal lubrication channel 210 is connected to the first On the branch port of the second distributor 204 close to the second inlet joint 201, the second shaft seal lubrication passage 210 is generally L-shaped, that is, the second shaft seal lubrication passage 210 extends radially from the branch port of the second distributor 204 and bends After entering the second end cover 207 and extending to supply oil and gas to the second rotary shaft seal 208, a plurality of second bearing lubricating passages 209 are respectively connected to the remaining branch ports of the second distributor 204 and extend radially to each second bearing 205, so as to supply oil and gas to each second bearing 205 in the transmission side bearing housing 200 respectively, that is, the second shaft seal lubrication passage 210 and the second bearing lubrication passage 209 are not connected to each other, but only connected to each other The connection of the second distributor 204 not only facilitates the processing operation of the lubricating channel, but also realizes the supply and control of oil and gas to a second shaft seal lubricating channel 210 and a plurality of second bearing lubricating channels 209 through the second distributor 204, realizing Separate lubrication of the second rotary shaft seal 208 and the plurality of second bearings 205 .

Furthermore, as shown in FIG. 1 , the second shaft seal lubricating channel 210 is provided with a second pin barrel 211 , and the second pin barrel 211 is located at the inner end surface 202 of the transmission side bearing housing 200 , so that The second pin cylinder 211 is provided with a second inner through hole, and the two ends of the second pin cylinder 211 and the inner wall surface of the second shaft seal lubrication channel 210 are respectively provided with a second sealing ring 212, specifically Yes, the second pin cylinder 211 is generally cylindrical, and the axial direction of the second pin cylinder 211 is perpendicular to the inner end surface 202 of the transmission side bearing seat 200, that is, the second pin cylinder 211 is respectively on the transmission side bearing seat from the inner end surface 202. 200 and the second end cover 207 are bidirectionally extended to avoid oil and gas leakage at the joint surface, and at the same time, O-shaped second sealing rings 212 are respectively arranged at the two ends of the second pin barrel 211 to avoid oil and gas leakage in the second pin barrel 211. The end of 211 leaks to ensure sealing.

Preferably, as shown in Figure 1, the transmission side bearing housing 200 is provided with four rows of tapered roller type second bearings 205 and three second bearing lubrication passages 209, and the three second bearings are lubricated Channels 209 and four-row tapered roller-type second bearings 205 are alternately arranged, that is, each second bearing lubrication channel 209 extends between adjacent two-row tapered roller-type second bearings 205 and provides lubrication for them. , the second distributor 204 is provided with a first branch port, a second branch port, a third branch port and a fourth branch port at intervals in the direction from the inner end face 202 to the outer end face 203 of the transmission side bearing seat 200, and the two are adjacent to each other. The distance between the branch ports is determined according to the distance between the lubricating channels of the four-row tapered roller type second bearing 205 itself and the space in the drive side bearing housing 200, wherein the second branch port, the third branch port and the first branch port In most cases, the distance between the four branch ports is equal, and the distance between the first branch port and the second branch port adjacent to it is determined by the distance in the transmission side bearing seat 200 in most cases. The available space is not equal to the distance between the second branch port, the third branch port and the fourth branch port. The second shaft seal lubricating channel 210 is connected to the first branch port of the second distributor 204 , the three second bearing lubricating channels 209 are respectively connected to the second branch port, the third branch port and the fourth branch port of the second distributor 204, wherein one end of the second bearing lubricating channel 209, the second shaft seal lubricating channel One end of 210 radially penetrates through the drive side bearing seat 200 to facilitate the hole opening operation in the process, and the second sealing screw plug 206 is plugged at its end to seal the process hole to avoid leakage.

Further, as shown in FIGS. 1 to 4 , the outer end surface 103 of the operating-side bearing housing 100 is provided with a first installation port 113 that can pass through the first distributor 104 to meet the needs of the operating-side bearing housing 100 The built-in first distributor 104 is installed on the outside, and the first inlet joint 101 is screwed to the first installation port 113 to facilitate installation; the inner end surface 202 of the transmission side bearing housing 200 is provided with a The second installation port 213 of the second distributor 204 is to meet the installation of the built-in second distributor 204 from the inner side of the transmission side bearing seat 200, and the second inlet joint 201 is screwed to the second installation port 213 for convenience. Installation, in one embodiment, a through hole can be provided in the drive side bearing seat 200, and the through hole extends from the inner end surface 202 to the outer end surface 203 and runs through the drive side bearing seat 200, so as to facilitate the drilling operation in the process. The second installation port 213 is one end of the through hole, and the other end of the through hole is provided with a second sealing screw plug 206 to seal the end to avoid leakage, and the second distributor 204 is placed in the through hole.

The oil-air lubrication structure of the work roll bearing seat of the rolling mill can meet the needs of the oil-air lubrication of the work roll of the cold rolling mill. When it is manufactured and installed, the lubricating passages are firstly processed in the operation side bearing seat 100 and the transmission side bearing seat 200, and then sequentially Complete the installation of the first bearing 105, the first pin cylinder 111, the first sealing ring 112, the first sealing screw plug 106, the first inlet joint 101 and the connecting pipe 115 in the bearing seat 100 on the operation side, and install them on the transmission side in sequence. The installation of the second bearing 205 , the second pin cylinder 211 , the second sealing ring 212 , the second sealing screw plug 206 , the second distributor 204 , and the second inlet joint 201 is completed in the bearing housing 200 .

The characteristics and advantages of the oil-air lubrication structure of the work roll bearing seat of the rolling mill of the utility model:

1. In the utility model, a first shaft seal lubrication passage 110 and multiple first bearing lubrication passages 109 are provided in the bearing housing 100 on the operating side, and a second shaft seal lubrication passage 210 and multiple first bearing lubrication passages 109 are provided in the transmission side bearing housing 200. The second bearing lubricating channel 209 is used to realize the multi-row first bearing 105 and the first rotary shaft seal 108 in the operation side bearing housing 100 and the inside of the transmission side bearing housing 200 through the first distributor 104 and the second distributor 204 respectively. The multi-row second bearings 205 and the second rotary shaft seal 208 distribute and supply oil and gas for lubrication, so as to realize comprehensive oil and gas lubrication and supply control for the bearings and shaft seals of the work roll chocks of the rolling mill, so as to ensure good working conditions and reduce failures Overhaul;

2. The utility model provides a first pin cylinder 111 in the first shaft seal lubrication passage 110, a second pin cylinder 211 in the second shaft seal lubrication passage 210, and the two ends of the first pin cylinder 111 and the Between the inner walls of the first shaft seal lubricating channel 110 and between the two ends of the second pin cylinder 211 and the inner walls of the second shaft seal lubricating channel 210, seal rings are respectively provided to avoid contact between the first end cover 107 and the operating side. The oil and gas leakage between the inner end surface 102 of the bearing housing 100, between the second end cover 207 and the inner end surface 202 of the transmission side bearing housing 200, and the two ends of the first pin cylinder 111 and the second pin cylinder 211 ensures sealing;

3. The utility model passes through the connecting pipe 115 in the operation side bearing seat 100 and connects with the second inlet joint 201 of the transmission side bearing seat 200, so as to realize the connection between the operation side bearing seat 100 and the transmission side bearing seat 200 on the operation side. The plug-in and pull-out of the joint facilitates the roll changing operation, improves the working efficiency and saves the labor cost.

The above descriptions are only illustrative specific implementations of the present utility model, and are not intended to limit the scope of the present utility model. Any equivalent changes and modifications made by those skilled in the art without departing from the principles and concepts of the present invention shall fall within the scope of protection of the present invention.

Claims (10)

1. A rolling mill work roll chock oil-air lubrication structure, characterized in that, the rolling mill work roll chock oil-air lubrication structure comprises: The bearing seat on the operating side has a first inlet joint on its outer side and a first end cover on its inner side. The first end cover is provided with a first rotary shaft seal. The bearing seat on the operating side is provided with a The first distributor connected to the first inlet joint, the first distributor supplies multiple rows of first bearings in the operation side bearing housing and the The first rotary shaft seal supplies oil and gas, and a connecting pipe runs through the operating side bearing seat; The drive side bearing housing has a second inlet joint and a second end cover inside, the second inlet joint is connected to the communication pipe, the second end cover is provided with a second rotary shaft seal, and the drive side A second distributor connected to the second inlet joint is provided in the bearing seat, and the second distributor is respectively supplied to the Multiple rows of second bearings and the second rotary shaft seal are supplied with oil and gas. 2. The oil-air lubrication structure of the work roll chock of a rolling mill according to claim 1, wherein the plurality of lubricating passages in the operating side chock include a first shaft seal lubricating passage and a plurality of first bearing lubricating passages , one end of the first shaft seal lubricating channel communicates with the first rotary shaft seal, and the other end of the first shaft seal lubricating channel connects with the end of the first distributor away from the first inlet joint, A plurality of the first bearing lubricating channels are connected side by side between both ends of the first distributor, and the ends of the first bearing lubricating channels away from the first distributor are located in two adjacent rows of the first distributor. between a bearing. 3. The oil-air lubrication structure of the work roll chock of a rolling mill according to claim 2, wherein a first pin cylinder is provided in the first shaft seal lubrication channel, and the first pin cylinder is located at the operating side bearing At the inner end surface of the seat, the first pin cylinder is provided with a first inner through hole. 4. The oil-air lubrication structure of the work roll chock of a rolling mill according to claim 3, wherein a first sealing ring. 5. The oil-air lubrication structure of the work roll chock of a rolling mill according to claim 2, characterized in that, the first bearing of the four-row tapered roller type and the three first Bearing lubrication channel. 6. The oil-air lubrication structure of the work roll chock of a rolling mill according to claim 1 or 2, characterized in that the multiple lubrication passages in the transmission side chock include a second shaft seal lubrication passage and multiple second bearings Lubrication passage, one end of the second shaft seal lubrication passage communicates with the second rotary shaft seal, the other end of the second shaft seal lubrication passage connects with the second distributor, a plurality of the second bearings The lubricating channel is connected side by side with the second distributor and is spaced apart from the second shaft seal lubricating channel. 7. The oil-air lubrication structure of the work roll chock of a rolling mill according to claim 6, wherein a second pin cylinder is provided in the second shaft seal lubrication channel, and the second pin cylinder is located at the transmission side bearing At the inner end surface of the seat, the second pin cylinder is provided with a second inner through hole. 8. The oil-air lubrication structure of the work roll chock of a rolling mill according to claim 7, wherein two ends of the second pin cylinder and the inner wall of the second shaft seal lubrication channel are respectively provided with two sealing ring. 9. The oil-air lubrication structure of the working roll chock of a rolling mill according to claim 6, characterized in that, the transmission-side chock is provided with four rows of tapered roller type second bearings and three second bearings. Bearing lubrication channel. 10. The oil-air lubrication structure of the work roll chock of a rolling mill according to claim 1, wherein the outer end surface of the operating side chock is provided with a first installation port that can pass through the first distributor, and the first An inlet joint is screwed to the first installation port; the inner end surface of the transmission side bearing seat is provided with a second installation port that can pass through the second distributor, and the second inlet joint is screwed to the first installation port. Two installation ports.