CN108662014B - Oil-control resistance-reducing cylindrical roller bearing - Google Patents
Oil-control resistance-reducing cylindrical roller bearing Download PDFInfo
- Publication number
- CN108662014B CN108662014B CN201810706912.9A CN201810706912A CN108662014B CN 108662014 B CN108662014 B CN 108662014B CN 201810706912 A CN201810706912 A CN 201810706912A CN 108662014 B CN108662014 B CN 108662014B
- Authority
- CN
- China
- Prior art keywords
- ring
- oil
- bearing
- resistance
- oil outlet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000003921 oil Substances 0.000 abstract description 157
- 239000010687 lubricating oil Substances 0.000 abstract description 15
- 238000003756 stirring Methods 0.000 abstract description 7
- 238000005461 lubrication Methods 0.000 description 4
- 238000012856 packing Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
- F16C19/34—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
- F16C19/36—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with a single row of rollers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
- F16C33/583—Details of specific parts of races
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/66—Special parts or details in view of lubrication
- F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
- F16C33/664—Retaining the liquid in or near the bearing
Abstract
The invention belongs to the technical field of bearings, in particular to an oil-control resistance-reducing cylindrical roller bearing; the oil outlet device comprises a bearing inner ring, a bearing outer ring and a cylindrical roller, wherein a bearing gasket is arranged on the end face of the oil outlet end of the bearing inner ring, the bearing gasket is connected with the bearing outer ring through an inner oil outlet ring and an outer oil ring, the inner oil outlet ring rotates along with the bearing gasket, the outer oil ring rotates along with the bearing outer ring, a plurality of oil outlet holes are uniformly distributed in the circumferential direction of the inner oil outlet ring and the outer oil ring, and the oil outlet state is realized when the hole positions of part of the oil outlet holes on the inner oil outlet ring and the outer oil ring are overlapped; an inner resistance oil ring rotating along with the bearing inner ring is sleeved on the oil inlet end of the bearing inner ring, an outer resistance oil ring rotating along with the bearing outer ring is arranged in the oil inlet end of the bearing outer ring, a plurality of oil inlet holes are uniformly distributed on the inner resistance oil ring and the outer resistance oil ring in the circumferential direction, and the oil inlet state is achieved when the hole positions of part of the oil inlet holes on the inner resistance oil ring and the outer resistance oil ring are overlapped; the invention has simple structure and can reduce the resistance generated by stirring the lubricating oil.
Description
Technical Field
The invention belongs to the technical field of bearings, and particularly relates to an oil-control resistance-reducing cylindrical roller bearing.
Background
At present, in cylindrical roller bearing products in the same industry, the bearings are completely opened for lubrication, lubricating oil enters the bearings for lubricating the rotating shafts, but the flow of the lubricating oil cannot be controlled, and certain stirring resistance is generated for the rotation of the bearings. Foreign literature data prove that the influence of the resistance generated by lubrication stirring on the whole bearing rotation moment reaches 30 percent. Therefore, in use of the bearing, stirring resistance of the lubricating oil must be reduced in order to reduce the rotational moment.
Disclosure of Invention
The invention aims to provide an oil control resistance-reducing cylindrical roller bearing which reduces the stirring resistance of lubricating oil by controlling the lubricating oil entering the bearing.
The invention is realized in the following way:
the utility model provides a accuse oil falls and hinders cylindrical roller bearing, includes bearing inner race, bearing outer lane and a plurality of circumference equipartition cylinder roller between bearing inner race and bearing outer lane, the axial dimension of bearing inner race is less than the axial dimension of bearing outer lane, and bearing inner race aligns with bearing outer lane at the oil feed end, is provided with the bearing packing ring on the terminal surface of the oil outlet end of bearing inner race, and the bearing packing ring is connected with bearing outer lane through interior oil ring, go out the oil ring and rotate along with the bearing packing ring, interior oil ring, go out the oil ring circumference equipartition have a plurality of oil outlet, be in the oil outlet state when the hole site of the partial oil outlet on interior oil ring, the go out the oil ring overlaps, can't go out oil when the hole site of all oil outlet does not overlap; an inner resistance oil ring rotating along with the bearing inner ring is sleeved on the oil inlet end of the bearing inner ring, an outer resistance oil ring rotating along with the bearing outer ring is arranged in the oil inlet end of the bearing outer ring, a plurality of oil inlet holes are uniformly distributed on the inner resistance oil ring and the outer resistance oil ring in the circumferential direction, the inner resistance oil ring and the outer resistance oil ring are in an oil inlet state when the hole positions of part of the oil inlet holes on the inner resistance oil ring and the outer resistance oil ring are overlapped, and oil cannot be fed when the hole positions of all the oil inlet holes are not overlapped.
In the oil-control resistance-reducing cylindrical roller bearing, the outer wall of the bearing washer is provided with the first annular groove, the inner ring of the inner oil-discharging ring is embedded and fixed in the first annular groove, and the outer ring is tightly attached to the inner wall of the outer ring of the bearing; the outer ring of the outgoing oil ring is embedded and fixed in the second annular groove, and the inner ring is tightly attached to the outer wall of the bearing gasket.
In the oil-control resistance-reducing cylindrical roller bearing, the outgoing oil ring is positioned on the outer side of the inner oil outlet ring, and the inner side surface of the outgoing oil ring is attached to the outer side surface of the inner oil outlet ring.
In the oil-control resistance-reducing cylindrical roller bearing, a third annular groove is formed in the outer wall of the inner ring of the bearing, which is positioned at the oil inlet end, and the inner ring of the internal resistance oil ring is embedded and fixed in the third annular groove, and the outer ring of the internal resistance oil ring is tightly attached to the inner wall of the outer ring of the bearing; the bearing outer ring is provided with a fourth annular groove on the inner wall of the oil inlet end, the outer ring of the outer oil resistance ring is embedded and fixed in the fourth annular groove, and the inner ring is tightly attached to the outer wall of the bearing inner ring.
In the oil-control resistance-reducing cylindrical roller bearing, the outer oil-resistance ring is positioned at the outer side of the inner oil-resistance ring, and the inner side surface of the outer oil-resistance ring is attached to the outer side surface of the inner oil-resistance ring.
Compared with the prior art, the invention has the outstanding advantages that:
1. according to the invention, the inner resistance oil ring and the outer resistance oil ring with the oil inlet holes are arranged on the inner ring and the outer ring of the bearing, and the inner oil outlet ring and the outer oil ring with the oil outlet holes are arranged between the outer ring of the bearing and the bearing gasket.
2. The invention has simple structure, convenient adjustment and installation, can flexibly control the quantity of the lubricating oil passing through the bearing, reduces the resistance generated by stirring the lubricating oil, has obvious effect on reducing the starting moment and has good use effect.
3. The invention solves the problems of resistance caused by lubrication of the existing bearing, reduces the rotation moment of the bearing in use, further reduces energy loss, is beneficial to reducing carbon dioxide emission, and reduces global environmental burden due to efficiency improvement.
Drawings
FIG. 1 is a cross-sectional view of an oil control drag reduction cylindrical roller bearing of the present invention;
fig. 2 is an enlarged view of a portion a of fig. 1;
FIG. 3 is a left side view of an oil control drag reducing cylindrical roller bearing of the present invention;
FIG. 4 is a schematic view of an outer oil-resistant ring of the present invention;
FIG. 5 is a view showing a state of use of the oil control drag reduction cylindrical roller bearing of the present invention.
In the figure: 1. a bearing inner ring; 2. a bearing outer ring; 3. a cylindrical roller; 4. a bearing washer; 5. an inner oil outlet ring; 6. an outgoing oil ring; 7. an oil outlet hole; 8. an internal resistance oil ring; 9. an outer oil-resistant ring; 10. and an oil inlet hole.
Detailed Description
The invention is further described below with reference to the specific examples, see fig. 1-5:
the utility model provides a accuse oil falls and hinders cylindrical roller bearing, includes bearing inner race 1, bearing outer race 2 and a plurality of circumference equipartition cylinder roller 3 between bearing inner race 1 and bearing outer race 2, the axial size of bearing inner race 1 is less than the axial size of bearing outer race 2, bearing inner race 1 aligns with bearing outer race 2 at the oil feed end, be provided with bearing washer 4 on the terminal surface of the oil outlet end of bearing inner race 1, bearing washer 4 is connected with bearing outer race 2 through interior oil ring 5, go out oil ring 6, interior oil ring 5 rotates along with bearing washer 4, go out oil ring 6 rotates along with bearing outer race 2, interior oil ring 5, go out oil ring 6 circumference equipartition have a plurality of oil outlet 7, be in the oil outlet state when the hole site of the partial oil outlet 7 on interior oil ring 5, the go out oil ring 6 overlaps, the unable oil outlet 7's of hole site when not overlapping; an inner resistance oil ring 8 rotating along with the bearing inner ring 1 is sleeved on the oil inlet end of the bearing inner ring 1, an outer resistance oil ring 9 rotating along with the bearing outer ring 2 is arranged in the oil inlet end of the bearing outer ring 2, a plurality of oil inlet holes 10 are uniformly distributed on the inner resistance oil ring 8 and the outer resistance oil ring 9 in the circumferential direction, when the hole positions of part of the oil inlet holes 10 on the inner resistance oil ring 8 and the outer resistance oil ring 9 are overlapped, the oil can not be fed when the hole positions of all the oil inlet holes 10 are not overlapped.
As shown in fig. 5, the arrow direction in the drawing is the oil injection direction. According to the invention, an inner oil resistance ring 8 and an outer oil resistance ring 9 with oil inlet holes 10 are arranged on a bearing inner ring 1 and a bearing outer ring 2, and an inner oil outlet ring 5 and an outer oil resistance ring 6 with oil outlet holes 7 are arranged between the bearing outer ring 2 and a bearing gasket 4, wherein the oil inlet holes 10 on the inner oil resistance ring 8 and the outer oil resistance ring 9 and the oil outlet holes 7 on the inner oil outlet ring 5 and the outer oil resistance ring 6 are respectively overlapped in the rotation process of the bearing, namely when the positions of the oil inlet holes 10 are consistent, lubricating oil enters the bearing to lubricate, when the positions of the oil inlet holes 10 are inconsistent, lubricating oil cannot enter the bearing, so that the lubricating oil quantity entering the bearing is controlled, and the influence on lubrication caused by too little oil quantity of the bearing is avoided; similarly, when the positions of the oil outlet holes 7 are consistent, the lubricating oil flows outwards from the inside of the bearing, so that the amount of the lubricating oil passing through the inside of the bearing can be flexibly controlled, and the resistance generated by stirring the lubricating oil can be reduced. The invention controls the injection total amount and the oil outlet amount of lubricating oil in the bearing, and forms the oil-control resistance-reducing cylindrical roller bearing.
Further, a first annular groove is formed in the outer wall of the bearing washer 4, the inner ring of the inner oil outlet ring 5 is embedded and fixed in the first annular groove, and the outer ring is tightly attached to the inner wall of the bearing outer ring 2; the inner wall of the bearing outer ring 2, which is positioned at the oil outlet end, is provided with a second annular groove, the outer ring of the outgoing oil ring 6 is embedded and fixed in the second annular groove, and the inner ring is tightly attached to the outer wall of the bearing gasket 4.
Further, the outgoing oil ring 6 is located at the outer side of the inner oil outlet ring 5, and the inner side surface of the outgoing oil ring 6 is attached to the outer side surface of the inner oil outlet ring 5.
Similarly, a third annular groove is formed in the outer wall of the bearing inner ring 1 at the oil inlet end, the inner ring of the internal resistance oil ring 8 is embedded and fixed in the third annular groove, and the outer ring is tightly attached to the inner wall of the bearing outer ring 2; the inner wall of the bearing outer ring 2 positioned at the oil inlet end is provided with a fourth annular groove, the outer ring of the outer oil resistance ring 9 is embedded and fixed in the fourth annular groove, and the inner ring is tightly attached to the outer wall of the bearing inner ring 1.
Further, the outer oil-resistant ring 9 is located at the outer side of the inner oil-resistant ring 8, and the inner side surface of the outer oil-resistant ring 9 is attached to the outer side surface of the inner oil-resistant ring 8.
After the installation, the inner resistance oil ring 8 and the outer resistance oil ring 9 are required to be coaxially arranged with the bearing inner ring 1 and the bearing outer ring 2, and the circle centers of circles where the circle centers of the oil inlet holes 10 on the inner resistance oil ring 8 and the outer resistance oil ring 9 are positioned are arranged on the axes of the bearing inner ring 1 and the bearing outer ring 2. The oil inlet holes 10 on the internal resistance oil ring 8 and the external resistance oil ring 9 can be completely or partially overlapped when overlapped; the present embodiment preferably coincides entirely. Similarly, the oil outlet holes 7 on the inner oil outlet ring 5 and the outer oil ring 6 are coaxially arranged with the bearing inner ring 1 and the bearing outer ring 2, the circle centers of the circles of the circle centers of the oil outlet holes 7 on the inner oil outlet ring 5 and the outer oil ring 6 are arranged on the axes of the bearing inner ring 1 and the bearing outer ring 2, and the oil outlet holes 70 on the inner oil outlet ring 5 and the outer oil ring 6 can be completely or partially overlapped when overlapped; the present embodiment preferably coincides entirely.
The above embodiment is only one of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, therefore: all equivalent changes in shape, structure and principle of the invention should be covered in the scope of protection of the invention.
Claims (3)
1. The utility model provides a accuse oil falls and hinders cylindrical roller bearing, includes bearing inner race (1), bearing outer lane (2) and a plurality of circumference equipartition cylindrical roller (3) between bearing inner race (1) and bearing outer lane (2), its characterized in that: the axial dimension of the bearing inner ring (1) is smaller than that of the bearing outer ring (2), the bearing inner ring (1) is aligned with the bearing outer ring (2) at an oil inlet end, a bearing gasket (4) is arranged on the end face of an oil outlet end of the bearing inner ring (1), the bearing gasket (4) is connected with the bearing outer ring (2) through an inner oil outlet ring (5) and an outer oil ring (6), the inner oil outlet ring (5) rotates along with the bearing gasket (4), the outer oil ring (6) rotates along with the bearing outer ring (2), a plurality of oil outlet holes (7) are uniformly distributed in the circumferential direction of the inner oil outlet ring (5) and the outer oil ring (6), when part of the oil outlet holes (7) on the inner oil outlet ring (5) and the outer oil ring (6) are overlapped, the oil outlet holes of all the oil outlet holes (7) cannot be discharged when the positions of the oil outlet holes are not overlapped; an inner resistance oil ring (8) rotating along with the bearing inner ring (1) is sleeved on the oil inlet end of the bearing inner ring (1), an outer resistance oil ring (9) rotating along with the bearing outer ring (2) is arranged in the oil inlet end of the bearing outer ring (2), a plurality of oil inlet holes (10) are circumferentially uniformly distributed on the inner resistance oil ring (8) and the outer resistance oil ring (9), the oil inlet state is realized when the hole positions of part of the oil inlet holes (10) on the inner resistance oil ring (8) and the outer resistance oil ring (9) are overlapped, and oil cannot be fed when the hole positions of all the oil inlet holes are not overlapped; the outer wall of the bearing gasket (4) is provided with a first annular groove, the inner ring of the inner oil outlet ring (5) is embedded and fixed in the first annular groove, and the outer ring is tightly attached to the inner wall of the bearing outer ring (2); the outer ring of the outgoing oil ring (6) is embedded and fixed in the second annular groove, and the inner ring is tightly attached to the outer wall of the bearing gasket (4); the bearing inner ring (1) is provided with a third annular groove on the outer wall of the oil inlet end, the inner ring of the internal resistance oil ring (8) is embedded and fixed in the third annular groove, and the outer ring is tightly attached to the inner wall of the bearing outer ring (2); the bearing outer ring (2) is provided with a fourth annular groove on the inner wall of the oil inlet end, the outer ring of the outer oil resistance ring (9) is embedded and fixed in the fourth annular groove, and the inner ring is tightly attached to the outer wall of the bearing inner ring (1).
2. The oil control drag reduction cylindrical roller bearing according to claim 1, wherein: the outgoing oil ring (6) is positioned at the outer side of the inner oil outlet ring (5), and the inner side surface of the outgoing oil ring (6) is attached to the outer side surface of the inner oil outlet ring (5).
3. The oil control drag reduction cylindrical roller bearing according to claim 1, wherein: the outer oil resistance ring (9) is positioned on the outer side of the inner oil resistance ring (8), and the inner side surface of the outer oil resistance ring (9) is attached to the outer side surface of the inner oil resistance ring (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810706912.9A CN108662014B (en) | 2018-07-02 | 2018-07-02 | Oil-control resistance-reducing cylindrical roller bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810706912.9A CN108662014B (en) | 2018-07-02 | 2018-07-02 | Oil-control resistance-reducing cylindrical roller bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108662014A CN108662014A (en) | 2018-10-16 |
| CN108662014B true CN108662014B (en) | 2024-01-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810706912.9A Active CN108662014B (en) | 2018-07-02 | 2018-07-02 | Oil-control resistance-reducing cylindrical roller bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108662014B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109307016A (en) * | 2018-11-09 | 2019-02-05 | 瓦房店欧德轴承制造有限公司 | Vibrating screen special bearing |
| CN113389805A (en) * | 2021-05-14 | 2021-09-14 | 刘洪伟 | Wheel type stacked bearing |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2249501A (en) * | 1940-10-17 | 1941-07-15 | Gen Electric | Shaft supporting and lubricating arrangement |
| US2945730A (en) * | 1956-08-24 | 1960-07-19 | Tyson Bearing Corp | Seal for a separable bearing that locks the bearing partsinto a unit |
| JPH11132244A (en) * | 1997-10-31 | 1999-05-18 | Nippon Seiko Kk | Cylindrical roller bearing device provided with lubricating device |
| JPH11230178A (en) * | 1998-02-17 | 1999-08-27 | Nippon Seiko Kk | Cylindrical roller bearing device |
| JP2001330029A (en) * | 2000-05-19 | 2001-11-30 | Nsk Ltd | Lubricant-containing polymer-filled tapered roller bearing and metal mold for manufacturing the tapered roller bearing |
| CN202790121U (en) * | 2012-06-02 | 2013-03-13 | 洛阳轴研科技股份有限公司 | Split type bearing for high-power vertical-axis wind turbine |
| CN208669844U (en) * | 2018-07-02 | 2019-03-29 | 唐元超 | A kind of oil-control drop resistance cylinder roller bearing |
-
2018
- 2018-07-02 CN CN201810706912.9A patent/CN108662014B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2249501A (en) * | 1940-10-17 | 1941-07-15 | Gen Electric | Shaft supporting and lubricating arrangement |
| US2945730A (en) * | 1956-08-24 | 1960-07-19 | Tyson Bearing Corp | Seal for a separable bearing that locks the bearing partsinto a unit |
| JPH11132244A (en) * | 1997-10-31 | 1999-05-18 | Nippon Seiko Kk | Cylindrical roller bearing device provided with lubricating device |
| JPH11230178A (en) * | 1998-02-17 | 1999-08-27 | Nippon Seiko Kk | Cylindrical roller bearing device |
| JP2001330029A (en) * | 2000-05-19 | 2001-11-30 | Nsk Ltd | Lubricant-containing polymer-filled tapered roller bearing and metal mold for manufacturing the tapered roller bearing |
| CN202790121U (en) * | 2012-06-02 | 2013-03-13 | 洛阳轴研科技股份有限公司 | Split type bearing for high-power vertical-axis wind turbine |
| CN208669844U (en) * | 2018-07-02 | 2019-03-29 | 唐元超 | A kind of oil-control drop resistance cylinder roller bearing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108662014A (en) | 2018-10-16 |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20220112 Address after: 253200 Xishou Shandong Chaoyang Bearing Co., Ltd., Xiajin economic and Technological Development Zone, De Zhou City, Shandong Province Applicant after: SHANDONG ZHAOYANG BEARING CO.,LTD. Address before: 253200 Xishou Shandong Chaoyang Bearing Co., Ltd., Xiajin economic and Technological Development Zone, De Zhou City, Shandong Province Applicant before: Tang Yuanchao |
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