CN219188121U

CN219188121U - Foil mill capable of uniformly preventing oil from splashing under stress

Info

Publication number: CN219188121U
Application number: CN202223425824.2U
Authority: CN
Inventors: 张全成; 吴永新; 潘梦洁
Original assignee: Jiangsu Changlu New Energy Materials Technology Co ltd
Current assignee: Jiangsu Changlu New Energy Materials Technology Co ltd
Priority date: 2022-12-19
Filing date: 2022-12-19
Publication date: 2023-06-16
Anticipated expiration: 2032-12-19

Abstract

The utility model discloses a foil rolling mill capable of uniformly bearing force and preventing oil from splashing, and relates to the technical field of lithium battery aluminum foil processing. This foil mill that even grease proofing liquid of atress splashes can retrieve and cyclic utilization oil spout unit top sprays the process oil under through oil supply module and adapting unit, in order to make the material roller carry out even exerting pressure to the material in the material rolling process, can balance the down force to the material as far as possible through whole operation roller unit, through accuse oil row group and sealed shell group, can make oil spout unit prevent that fluid from splashing and can control the attached oil volume on material roller surface when spraying process oil as far as possible, be used for handling the operation needs of different rolling.

Description

Foil mill capable of uniformly preventing oil from splashing under stress

Technical Field

The utility model relates to the technical field of lithium battery aluminum foil processing, in particular to a foil rolling mill capable of uniformly bearing force and preventing oil from splashing.

Background

The foil rolling mill is a cold rolling mill for rolling a foil with a thickness of 0.0015-0.012 mm. The foil rolling mill adopts the world advanced technology, is equipped with an AGC and CVC system, has the full hydraulic electromechanical integrated automatic control function, can automatically balance, automatically center and automatically measure thickness, is rolled under load and constant tension, and is the most advanced cold rolling equipment in the nonferrous metal field. The aluminum foil rolling mill is used for rolling aluminum foil blanks with the maximum thickness of 0-6 mm for multiple passes to produce aluminum foil coiled materials with various thicknesses and widths. The finished product can be used for deep processing of aluminum foils, such as punching containers, embossing, printing coatings, laminating, food and beverage packaging containers in daily life, packaging of medicines, cosmetics and certain special materials, manufacturing of cables, heat exchangers and capacitors, building heat preservation, and wool materials for decorating materials and the like.

The utility model of application number CN201620952417.2 discloses an aluminum foil mill with an oil dripping device, which is characterized by comprising an uncoiler, a coiling machine, a plurality of conveying rollers and working rollers, wherein the conveying belt sequentially passes through the conveying rollers and the working rollers through the uncoiler and then is conveyed to the coiling machine, and an inlet oil dripping device is arranged between the first conveying roller and the uncoiler. The utility model has the following effects: 1. the oil dripping device is added at the inlet of the rolling mill, so that impurities on the incoming aluminum foil can be effectively cleaned, and the surface cleanliness of the aluminum foil which enters the working roll for rolling can be ensured; 2. meanwhile, the oil dropping device reduces hard friction when an oil film is attached to the surface of the aluminum foil to enable the aluminum foil to be in contact with the guide roller, the probability of generating scratch and black oil lines is avoided, but similar to the foil rolling mill in the document, in the process of operation, the oil spraying device is required to lubricate and cool the material in the process of being pressed by the working roller, although the high temperature formed by the hard friction and high pressure on the surface of the material is reduced, the oil dropping device also generates splashing of lubricating oil during operation, not only the waste of the lubricating oil is caused, but also the lubricating oil is caused to splash to other positions of the device, and the cleaning and maintenance of the device are affected.

Accordingly, in view of the above, research and improvement are made on the existing structure and the existing defects, and a foil mill capable of uniformly preventing oil from splashing under the stress is provided.

Disclosure of Invention

The utility model aims to provide a foil mill capable of uniformly bearing force and preventing oil from splashing, so as to solve the problems in the background technology.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a foil mill that atress evenly prevented fluid splashes, includes ground pedestal, operation roller unit and accuse oil row group, ground pedestal central authorities are provided with oil feeding module, and the top fixed mounting of oil feeding module has the mechanism of accepting, operation roller unit installs in the top of accepting the mechanism, and the left and right sides of operation roller unit is connected with the balance stake, the balance stake is kept away from one side of operation roller unit and is installed the stability post, oil feeding module's left side is connected with the oil pipe, and the oil pipe is kept away from oil feeding module's one end and is connected with the oil spout unit, accuse oil row group installs under the oil spout unit, sealed shell group is installed at operation roller unit's left and right sides both ends, the accuse oil row group includes splashproof net, adjusts depression bar, oil seepage board, accuse oil scraper blade and anti-overflow cover, the left and right sides of splashproof net all is connected with the oil seepage board, the oil control scraper is installed to one side that the splashproof net is kept away from to the oil seepage board, and the anti-overflow cover is installed to the left and right sides of accuse oil scraper.

Further, the oil supply module comprises an oil storage bin, oil delivery valves and oil feed pumps, wherein the oil delivery valves are arranged on the left side and the right side of the top of the oil storage bin, and the oil feed pumps are arranged on the left side and the right side of the oil storage bin.

Further, the bearing mechanism comprises an oil receiving groove, a converging disc and an oil filtering valve, the bottom of the oil receiving groove is connected with the converging disc, and the oil filtering valve is installed at the bottom of the converging disc.

Further, the operation roller unit comprises a rolling roller, a rotating unit, a bearing column and an oil cylinder unit, wherein the rotating unit is arranged on the left side and the right side of the rolling roller, the bottom of the rotating unit is connected with the bearing column, and the oil cylinder unit is arranged at one end, far away from the rotating unit, of the bearing column.

Further, the oil injection unit comprises a connecting pipe, an oil filtering pump, a fixing frame and an oil injection nozzle, wherein the oil filtering pump is installed at the bottom of the connecting pipe, the fixing frame is installed at one side, far away from the connecting pipe, of the oil filtering pump, and the oil injection nozzle is installed at one end, far away from the oil filtering pump, of the fixing frame.

Further, the sealing shell group comprises a spring telescopic rod, a partition plate and a sealing plate, the partition plate is arranged at the top of the spring telescopic rod, the sealing plate is arranged at the bottom of the partition plate, and the sealing shell group is symmetrically arranged left and right by taking the vertical central axis of the operation roller group as a symmetry axis.

Further, the operation roller set is installed up and down symmetrically by taking the horizontal central axis of the stabilizing column as a symmetry axis, and the rotating set, the bearing column and the oil cylinder set are installed left and right symmetrically by taking the vertical central axis of the material rolling roller as a symmetry axis.

Furthermore, the balance pile is installed in a bilateral symmetry mode by taking the vertical central axis of the oil supply module as a symmetry axis, and the stabilizing column is installed in a bilateral symmetry mode by taking the vertical central axis of the oil supply module as a symmetry axis.

The utility model provides a foil mill capable of uniformly preventing oil from splashing under stress, which has the following beneficial effects: the oil supply module and the bearing mechanism can recycle and recycle the process lubricating oil sprayed by the oil spraying unit at the upper part, in order to ensure that the material can be uniformly pressed by the material rolling roller in the material rolling process, the lower pressure of the material can be balanced as much as possible by the whole operation roller unit, the oil spraying unit can prevent the oil from splashing when the process lubricating oil is sprayed as much as possible and the oil attaching quantity on the surface of the material rolling roller can be controlled by the oil control unit and the sealing shell unit, so that the operation requirements of different rolling can be met.

1. According to the utility model, the oil supply module and the receiving mechanism are arranged, the process lubricating oil which is sprayed and dropped from the upper part is received by the oil receiving groove, then the oil flows into the converging disc below, in order to avoid impurities or other unnecessary components possibly generated during the operation of doping a material rolling roller in the recovered oil, the oil can be effectively filtered by the oil filtering valve, and then the oil can be conveyed into the oil storage bin right below for storage and standing, and the oil supply module can not only be used for injecting the process lubricating oil required during the operation of a foil rolling mill into the oil storage bin through the oil conveying valve, but also be used for conveying the oil recovered by the receiving mechanism into the oil conveying pipe through the oil feeding pump and carrying out the oil supply operation for the oil spraying unit, so that a complete circulation system is formed, and the operation cost is effectively reduced.

2. According to the utility model, the balance piles and the stabilizing columns are cooperated by the working roller unit, so that the influence on the quality of a finished product after discharging caused by uneven stress on the rolling roller is avoided, on one hand, the rolling roller can be stably translated up and down in the vertical direction by the oil cylinder units arranged at the two ends of the rolling roller, the problem that the rolling roller is uneven in the horizontal direction is avoided, and therefore, uneven hands are caused, and on the other hand, the balance piles and the stabilizing columns at the left side and the right side are utilized to further provide stable support for the whole working roller unit, and meanwhile, the influence on the processing quality of the material caused by vibration of the working roller unit in operation is avoided.

3. According to the utility model, the oil control row group and the sealing shell group are arranged, so that the aluminum foil blank is gradually thinned to the required thickness in the rolling process of materials by virtue of the rolling mode, in the process, high temperature is generated on the blank and the surface of the rolling roller due to extrusion, and meanwhile, rolling friction can cause abrasion on the blank and the surface of the rolling roller, so that the oil control row group can spray process lubricating oil on the surface of the rolling roller, further, the blank and the surface of the rolling roller are cooled and protected, and in order to avoid splashing everywhere during spraying of the oil, on one hand, the oil control row group can be used for avoiding the oil storage chamber sputtering of the oil injection unit, meanwhile, the oil attaching quantity on the surface of the rolling roller can be controlled, and meanwhile, the sealing shell groups arranged on two sides of the rolling roller can limit the oil between the upper and lower operation roller units, so that the flow around is avoided, and meanwhile, the recovery of the oil by a lower receiving mechanism is facilitated.

Drawings

FIG. 1 is a schematic side view of a stand body of a foil mill with uniform force to prevent oil splashing;

FIG. 2 is a schematic view of the work roll set of FIG. 1 of a foil mill with uniform force to prevent oil splatter in accordance with the present utility model;

FIG. 3 is a schematic diagram of a fuel injection unit of a foil mill with uniform stress and oil splash prevention;

FIG. 4 is a schematic diagram of an oil control row group structure of a foil mill with uniform stress and oil splashing prevention;

FIG. 5 is an enlarged schematic view of the foil mill of FIG. 1 with uniform force to prevent oil splatter;

fig. 6 is a schematic perspective view of a stand of a foil mill with uniform force to prevent oil splashing.

In the figure: 1. a floor base; 2. an oil supply module; 201. an oil storage bin; 202. an oil delivery valve; 203. an oil feed pump; 3. a receiving mechanism; 301. an oil receiving groove; 302. a converging disc; 303. an oil filter valve; 4. a work roll unit; 401. a material rolling roller; 402. rotating the unit; 403. a pressure-bearing column; 404. an oil cylinder unit; 5. balance piles; 6. a stabilizing column; 7. an oil delivery pipe; 8. the oil spraying unit; 801. a connecting pipe; 802. a filter oil pump; 803. a fixing frame; 804. oil injection discharging nozzles; 9. controlling oil discharge groups; 901. a splash-proof net; 902. adjusting a compression bar; 903. an oil seepage plate; 904. an oil control scraping plate; 905. an anti-overflow cover; 10. a sealed shell group; 1001. a spring telescoping rod; 1002. a partition panel; 1003. and (5) sealing the plate.

Detailed Description

Embodiments of the present utility model are described in further detail below with reference to the accompanying drawings and examples. The following examples are illustrative of the utility model but are not intended to limit the scope of the utility model.

As shown in fig. 1 to 3, a foil mill with uniform stress and oil splashing prevention comprises a ground stand 1, an operation roller unit 4 and an oil control row group 9, wherein an oil supply module 2 is arranged in the center of the ground stand 1, a bearing mechanism 3 is fixedly arranged at the top of the oil supply module 2, the operation roller unit 4 is arranged at the top of the bearing mechanism 3, balance piles 5 are connected to the left side and the right side of the operation roller unit 4, a stabilizing column 6 is arranged at one side of the balance piles 5 far away from the operation roller unit 4, an oil delivery pipe 7 is connected to the left side of the oil supply module 2, one end of the oil delivery pipe 7 far away from the oil supply module 2 is connected with an oil injection unit 8, the oil control row group 9 is arranged under the oil injection unit 8, sealing shell groups 10 are arranged at the left end and the right end of the operation roller unit 4, the oil supply module 2 comprises an oil storage bin 201, an oil delivery valve 202 and an oil feeding pump 203, the left side and the right side of the top of the oil storage bin 201 are provided with the oil delivery valves 202, the left and right sides of the oil storage bin 201 are provided with oil feeding pumps 203, the receiving mechanism 3 comprises an oil receiving groove 301, a converging disc 302 and an oil filtering valve 303, the bottom of the oil receiving groove 301 is connected with the converging disc 302, the bottom of the converging disc 302 is provided with the oil filtering valve 303, when the oil quantity in the oil storage bin 201 is insufficient, the process lubricating oil in the oil storage bin 201 can be fed through the oil feeding valves 202 at the left and right ends of the top, the oil feeding valves 202 can prevent the oil quantity in the oil storage bin 201 from volatilizing or being stained, the oil can be pumped to the oil feeding pipe 7 through the oil feeding pump 203, further the process lubricating oil required by operation can be provided for the oil spraying unit 8, after the oil spraying unit 8 sprays the oil, the oil can directly fall into the oil receiving groove 301 along the rolling roller 401, and then flows into the oil filtering valve 303 through the converging disc 302, the oil can be effectively filtered by the oil filtering valve 303, and then the oil can be conveyed to the oil storage bin 201 right below for storage and standing.

As shown in fig. 1 to 2, the working roll set 4 includes a rolling roll 401, a rotating set 402, a pressing column 403 and an oil cylinder set 404, the rotating set 402 is installed on the left and right sides of the rolling roll 401, the pressing column 403 and the oil cylinder set 404 are connected to the bottom of the rotating set 402, the oil cylinder set 404 is installed on one end of the pressing column 403 far away from the rotating set 402, the working roll set 4 is installed symmetrically up and down with the horizontal central axis of the stabilizing column 6 as the symmetry axis, the rotating set 402, the pressing column 403 and the oil cylinder set 404 are all installed symmetrically left and right with the vertical central axis of the rolling roll 401 as the symmetry axis, the balancing pile 5 is installed symmetrically left and right with the vertical central axis of the oil supply module 2 as the symmetry axis, the stabilizing column 6 is installed symmetrically left and right with the vertical central axis of the oil supply module 2, the pressing column 403 and the oil cylinder set 404 are connected through the pressing columns 403 and the left and right ends of the rolling roll 401, the adjusting property and the pressure control of the vertical translation can be provided for the whole working roll set 4, the rotating set 402 can provide the rotation speed required by the working for the rolling roll 401 to control the discharging speed, the balancing pile 5 is further provided by the stabilizing the material quality of the stabilizing roll set 4 when the two sides and the stabilizing pile 6 are used to support the working roll 4.

As shown in fig. 1 to 6, the oil injection unit 8 includes a connecting pipe 801, an oil filtering pump 802, a fixing frame 803 and an oil injection nozzle 804, the oil filtering pump 802 is installed at the bottom of the connecting pipe 801, the fixing frame 803 is installed at the side of the oil filtering pump 802 far away from the connecting pipe 801, the oil injection nozzle 804 is installed at the end of the fixing frame 803 far away from the oil filtering pump 802, the oil control discharging unit 9 includes a splash screen 901, an adjusting compression bar 902, an oil seepage plate 903, an oil control scraper 904 and an anti-overflow cover 905, both the left and right ends of the splash screen 901 are connected with the adjusting compression bar 902, the bottom of the splash screen 901 is connected with the oil seepage plate 903, the oil control scraper 904 is installed at the side of the oil seepage plate 903 far away from the splash screen 901, the anti-overflow cover 905 is installed at both the left and right sides of the oil control scraper 904, the sealing case set 10 includes a spring expansion bar 1001, a partition plate 1002 and a sealing plate 1003, the partition plate 1002 is installed at the top of the spring expansion bar 1001, and the bottom of the partition plate 1002 is provided with a sealing plate 1003, the sealing shell group 10 is symmetrically arranged left and right by taking the vertical central axis of the working roller unit 4 as a symmetry axis, when the oil delivery pipe 7 delivers process lubricating oil delivered by the oil supply module 2 to the oil injection unit 8, wherein the connecting pipe 801 delivers the oil to the oil filtering pump 802, the oil filtering pump 802 firstly filters the oil further, then pumps the oil into the oil injection nozzles 804 at the bottom of the fixing frame 803, then the oil injection nozzles 804 spray the oil into the oil control discharging group 9 below, firstly the dense net structure of the splash screen 901 receives the sprayed oil and weakens the sputtering effect, meanwhile, the oil is gradually delivered to the surface of the oil control scraper 904 by the oil delivery plate 903 through the oil seepage plate 903 below the rear flow passage of the splash screen 901, finally the oil is scraped to the surface of the rotating material rolling roller 401 through the oil control scraper 904, the anti-overflow cover 905 limits oil between the upper working roller set 4 and the lower working roller set 4 to prevent the oil from flowing around, the adjusting compression bar 902 can control the gap between the whole oil control row set 9 and the contact surface of the working roller set 4 to control the oil attaching amount on the surface of the material rolling roller 401, in order to further prevent the oil from flowing around during the up-down butt joint operation of the upper working roller set 4 and the lower working roller set 4, the sealing plate 1003 is extruded in the vertical direction and is transmitted to the spring telescopic rod 1001 through the partition plate 1002, the pressure is relieved by the spring telescopic rod 1001, the upper working roller set 4 and the lower working roller set 4 are rolled up and down, and the whole sealing shell set 10 seals the left side and the right side of the contact surface of the material rolling roller 401 to prevent the oil from flowing around.

In summary, as shown in fig. 1 to 6, when the foil mill with uniform stress and oil splashing prevention is used, firstly, checking and confirming the internal oil quantity of the oil storage bin 201 in the oil supply module 2, replenishing process lubricating oil in the oil storage bin 201 through oil delivery valves 202 at the left and right ends of the top of the oil storage bin 201 according to requirements, and then adjusting the gap between the whole oil control discharge set 9 and the contact surface of the working roller set 4 through adjusting a compression bar 902 according to the working requirements to control the oil attaching quantity on the surface of the material rolling roller 401;

and then starting the whole foil mill, when blanks are about to enter between the upper and lower sets of operation roller units 4, the oil pump can be used for carrying the oil to the oil delivery pipe 7 through the oil feeding pump 203, further process lubricating oil required by operation is provided for the oil injection unit 8, when the oil delivery pipe 7 is used for conveying the process lubricating oil conveyed by the oil supply module 2 to the oil injection unit 8, wherein the connecting pipe 801 is used for conveying the oil to the oil filtering pump 802, the oil filtering pump 802 is used for filtering the oil further, the oil is pumped into the oil injection discharging nozzle 804 at the bottom of the fixing frame 803, the oil injection discharging nozzle 804 is used for spraying the oil into the oil control discharging group 9 below, firstly, the tight net structure of the splash screen 901 can be used for carrying out bearing and weakening sputtering effect, meanwhile, the oil is gradually conveyed to the surface of the oil control scraping plate 904 through the oil seepage plate 903 below the splash screen 901, finally the oil is coated to the surface of the rotating material rolling roller 401 through the oil control scraping plate 904, the oil is prevented from flowing around the upper and lower operation roller unit 4, the oil is prevented from flowing around by the oil is prevented from flowing around the upper and lower operation roller unit 803, the upper and lower operation roller unit is further prevented from being contacted with the sealing plate 1001, the upper and lower operation roller units are prevented from being contacted with the sealing plate 10 by the upper and lower operation roller units and the sealing plate is prevented from being contacted with the upper and lower operation roller unit 4.

The rolling columns 403 and the cylinder units 404 at the left and right ends of the rolling roller 401 can provide adjustment and pressure control for vertical translation of the whole working roller unit 4, the rotating unit 402 can provide rotation speed required by operation for the rolling roller 401 to control discharging speed, the balance piles 5 and the stabilizing columns 6 at the left and right sides are utilized to further provide stable support for the whole working roller unit 4, meanwhile, the influence on processing quality of materials caused by vibration of the working roller unit 4 in operation is avoided, when the oil spraying unit 8 sprays oil, the oil can flow between the upper and lower rolling rollers 401 and blanks, then directly falls into the oil receiving groove 301 from top to bottom, then flows into the oil filtering valve 303 through the converging disc 302, impurities or other unnecessary components possibly generated during operation of the doping of the rolling roller 401 in recovered oil liquid are avoided, the oil can be effectively filtered by the oil filtering valve 303, and then the oil can be conveyed into the oil bin 201 under the oil storage and kept stand.

The embodiments of the utility model have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the utility model in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, and to enable others of ordinary skill in the art to understand the utility model for various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. The utility model provides a foil mill that atress is even prevents that fluid splashes, includes ground pedestal (1), operation roller unit (4) and accuse oil row group (9), its characterized in that: the center of the platform seat (1) is provided with an oil supply module (2), and the top fixed mounting of the oil supply module (2) has a bearing mechanism (3), operation roller set (4) is installed at the top of bearing mechanism (3), and the left and right sides of operation roller set (4) are connected with balancing pile (5), one side that operation roller set (4) was kept away from to balancing pile (5) is installed stability post (6), the left side of oil supply module (2) is connected with oil delivery pipe (7), and oil delivery pipe (7) is kept away from one end connection of oil supply module (2) and is installed oil spout unit (8), oil control row group (9) is installed under oil spout unit (8), sealed shell group (10) are installed at the left and right sides of operation roller set (4), oil control row group (9) are including splashproof net (901), regulation depression bar (903), oil drain board (904) and anti-overflow cover (905), the left and right sides of net (901) are all connected with regulation depression bar (903), oil control wiper (904) and anti-splash board (905) are kept away from bottom one side of installing oil control bar (901), and the left side and the right side of the oil control scraping plate (904) are provided with anti-overflow covers (905).

2. The foil mill with uniform stress and oil splashing prevention according to claim 1, wherein the oil supply module (2) comprises an oil storage bin (201), oil delivery valves (202) and oil feeding pumps (203), the oil delivery valves (202) are installed on the left side and the right side of the top of the oil storage bin (201), and the oil feeding pumps (203) are installed on the left side and the right side of the oil storage bin (201).

3. Foil mill with uniform stress and oil splashing prevention according to claim 1, characterized in that the receiving mechanism (3) comprises an oil receiving groove (301), a converging disc (302) and an oil filtering valve (303), the bottom of the oil receiving groove (301) is connected with the converging disc (302), and the oil filtering valve (303) is installed at the bottom of the converging disc (302).

4. The foil mill with uniform stress and oil splashing prevention according to claim 1, wherein the working roller unit (4) comprises a material rolling roller (401), a rotating unit (402), a bearing column (403) and an oil cylinder unit (404), the rotating unit (402) is arranged on the left side and the right side of the material rolling roller (401), the bearing column (403) is connected to the bottom of the rotating unit (402), and the oil cylinder unit (404) is arranged at one end, far away from the rotating unit (402), of the bearing column (403).

5. The foil mill with uniform stress and oil splashing prevention according to claim 1, wherein the oil injection unit (8) comprises a connecting pipe (801), an oil filtering pump (802), a fixing frame (803) and an oil injection nozzle (804), the oil filtering pump (802) is installed at the bottom of the connecting pipe (801), the fixing frame (803) is installed at one side, far away from the connecting pipe (801), of the oil filtering pump (802), and the oil injection nozzle (804) is installed at one end, far away from the oil filtering pump (802), of the fixing frame (803).

6. Foil mill with uniform stress and oil splashing prevention according to claim 2, characterized in that the sealing shell group (10) comprises a spring telescopic rod (1001), a partition plate (1002) and a sealing plate (1003), the partition plate (1002) is installed at the top of the spring telescopic rod (1001), the sealing plate (1003) is installed at the bottom of the partition plate (1002), and the sealing shell group (10) is installed in bilateral symmetry with the vertical central axis of the working roll group (4) as a symmetry axis.

7. The foil mill with uniform stress and oil splashing prevention according to claim 4, wherein the working roller unit (4) is symmetrically installed up and down by taking the horizontal central axis of the stabilizing column (6) as a symmetry axis, and the rotating unit (402), the bearing column (403) and the oil cylinder unit (404) are symmetrically installed left and right by taking the vertical central axis of the material rolling roller (401) as a symmetry axis.

8. Foil mill with uniform stress and oil splashing prevention according to claim 1, characterized in that the balance piles (5) are symmetrically installed with the vertical central axis of the oil supply module (2) as a symmetry axis, and the stabilizing columns (6) are symmetrically installed with the vertical central axis of the oil supply module (2) as a symmetry axis.