CN106402170B - The double thrust bearing device of electric submersible pump unit motor protecter - Google Patents
The double thrust bearing device of electric submersible pump unit motor protecter Download PDFInfo
- Publication number
- CN106402170B CN106402170B CN201510807662.4A CN201510807662A CN106402170B CN 106402170 B CN106402170 B CN 106402170B CN 201510807662 A CN201510807662 A CN 201510807662A CN 106402170 B CN106402170 B CN 106402170B
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- subordinate
- compression spring
- locating piece
- ring
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- 230000006835 compression Effects 0.000 claims abstract description 36
- 238000007906 compression Methods 0.000 claims abstract description 36
- 238000005096 rolling process Methods 0.000 claims abstract description 20
- 238000000338 in vitro Methods 0.000 claims description 4
- 239000011148 porous material Substances 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 1
- 239000003921 oil Substances 0.000 description 12
- 230000001012 protector Effects 0.000 description 5
- 238000003032 molecular docking Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 230000037237 body shape Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000005303 weighing 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
- F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
- F16C35/02—Rigid support of bearing units; Housings, e.g. caps, covers in the case of sliding-contact bearings
-
- 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
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/04—Sliding-contact bearings for exclusively rotary movement for axial load only
- F16C17/08—Sliding-contact bearings for exclusively rotary movement for axial load only for supporting the end face of a shaft or other member, e.g. footstep bearings
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Motor Or Generator Frames (AREA)
- Rolling Contact Bearings (AREA)
Abstract
A kind of double thrust bearing device of electric submersible pump unit motor protecter, including single axial rolling bearing, it is characterised in that：The downward hypomere cylinder of bearing block of single axial rolling bearing, is provided with locating piece in subordinate, locating piece, subordinate's support tube, compression spring, compression spring baffle ring under subordinate in hypomere cylinder, quiet piece under subordinate's motion block, subordinate；Subordinate's motion block is connected with subordinate support tube retaining ring；Upper supporting sleeve, subordinate's support tube key are sequentially connected；Subordinate's motion block possesses spacing with circle ring disk；It is installed under subordinate in subordinate on locating piece for quiet piece；Locating piece lower part is fixedly connected by key connection with compression spring baffle ring, round nut in subordinate；Round nut is screwed up in hypomere cylinder lower internal thread；Compression spring is installed between compression spring baffle ring and subordinate's locating piece shaft shoulder.Advantage is：Two-stage high load capacity thrust bearing load balancing, keeps the heat safe original operation characteristic of high load capacity thrust bearing.
Description
Technical field：
The present invention relates to the double thrust bearing device of oil-immersed pump, particularly electric submersible pump unit motor protecter.
Background technology：
Electric submersible pump unit is mainly used for deep-well pump oil, and the axial load of motor shaft is more much greater than conventional water pump, so
Top load bears using axial thrust bearing in its institute (motor protecter is subjected to 2.5-5 tons of thrust power).
Electric submersible pump unit is made of submersible motor, motor protecter, gs-oil separator, the pump housing.Motor shaft stretches into motor
Gs-oil separator, pump housing operation are driven after protector again, so axial rolling bearing is mounted in motor protecter.Routine is stopped
Thrust bearing using ball, roller bearing, because its rolling friction be multiple spot or it is multi-thread contacted with bearing ring, bearing load is small, no
It can apply in electric submersible pump unit, electric submersible pump unit is the high load capacity thrust bearing using sliding friction.High load capacity thrust
Bearing by upper quiet piece, motion block, under quiet piece form.Upper and lower quiet piece is the ring block that unilateral section is in class I-shaped, and motion block is circle
Ring block, motion block are clamped in upper and lower between quiet piece, and the binding face with upper and lower quiet piece is the sliding friction of anchor ring, load area
It is quite big, so producing high load capacity.Four dowel holes are offered in upper and lower quiet piece of ring block outside rectangular ring, it is right with it
Four stop round pins are evenly distributed with the top connection that connects, locating piece respectively move cooperation and stretch into the corresponding dowel hole of quiet piece of outside rectangular ring
It is middle to implement docking.
Existing list axial rolling bearing is made of bearing block, a high load capacity thrust bearing, top connection, lower locating piece.Such as
Shown in attached drawing：The cylindrical body of bearing block, inwardly extend 9 bottom of bearing block cylinder a bottom circle ring disk, bearing block outer wall
It is fixed on motor protecter, bearing block inner wall is internal thread hole, and locating piece 7 is in step shell-like, and step set external screw thread screws up
In 9 internal thread hole of cylinder, its basal surface is fitted on 21 upper surface of bottom circle ring disk, under high load capacity thrust bearing under quiet piece 5
Portion's outside rectangular ring inner circle is moved between shaft shoulder lower surface is inserted in cooperation and is provided with compression spring；Locating piece is a round nut under subordinate,
Round nut external screw thread is screwed up in the lower internal thread of hypomere cylinder, its upper surface and compression spring baffle ring upper ring plate lower surface bullet
Property overlay, round nut inner circle by key connection and tubulose under compression spring baffle ring in vitro circle implement it is fixedly sleeved.
The content of the invention：
It is an object of the invention to overcome drawbacks described above, there is provided a kind of double thrust shafts of electric submersible pump unit motor protecter
Bearing apparatus.
In order to solve the above technical problems, the technology of the double thrust bearing device of electric submersible pump unit motor protecter of the present invention
Solution is：
Including single axial rolling bearing, extend downwards one and bearing block in the bearing block lower surface of single axial rolling bearing
The isometrical hypomere cylinder of cylinder, locating piece in subordinate, locating piece, subordinate's support under subordinate are provided with hypomere cylinder
Quiet piece under pipe, compression spring, compression spring baffle ring, and subordinate's motion block of subordinate's high load capacity thrust bearing, subordinate；Subordinate's motion block passes through subordinate
Two semicircular rings are fixedly connected with subordinate support tube tight fit retaining ring；The supporting sleeve hypomere inner circle of single axial rolling bearing has additional
Rectangle keyway, subordinate's support tube epimere inner circle are equipped with corresponding rectangle keyway, pass through the long square of set unification between two rectangle keyways
Shape key is implemented to be sequentially connected；It is defeated that the radial direction connected with motor shaft center oil transportation hole is equipped between subordinate's motion block, subordinate's support tube
Oilhole, while spacing is possessed in the upper surface of subordinate's motion block and the lower part circle ring disk lower surface of single axial rolling bearing；It is fixed in subordinate
Position block be in two-way step shell-like, and two-way step set medium pore moves engagement sleeves on motor shaft is cylindrical, under subordinate quiet piece of lower part outside
Side straight-flanked ring inner circle is moved the top bar for coordinating and being inserted in two-way step set and is covered on cylindrical, the upper surface fixation of the two-way step set shaft shoulder
Four stop round pins are stretched under subordinate in the correspondence dowel hole of the outside rectangular ring of quiet piece of lower part；Two-way of locating piece in subordinate
Rank set lower part is cylindrical fixedly sleeved by key connection and circle in the lower tubulose body of compression spring baffle ring；Compression spring baffle ring is in a lower tubular body
Shape is docked with a upper ring plate；The two-way step set shaft shoulder lower surface of compression spring baffle ring upper ring plate upper surface and subordinate's locating piece it
Between compression spring is installed；Locating piece is a round nut under subordinate, and round nut external screw thread screws up the spiral shell in the lower part of hypomere cylinder
In line, its upper surface is overlayed with compression spring baffle ring upper ring plate following table surface elastic, and round nut inner circle passes through key connection and compression spring baffle ring
The circle implementation in vitro of lower tubulose is fixedly sleeved.
The advantage of the invention is that：It is more balanced when two-stage high load capacity thrust bearing load balancing, especially big load, no
It is excessive that the irregular phenomenon of bearing capacity, the single-bearing load of simple duplex bearing tandem can be produced, height friction triggers burning high temperature to burn
Bearing phenomenon is damaged, keeps the heat safe original operation characteristic of high load capacity thrust bearing, the harmony of duplex bearing load can be carried significantly
The scope of application of high electric submersible pump unit.
Brief description of the drawings：
Fig. 1 is schematic structural view of the invention.
Embodiment：
Structure of the present invention：Including single axial rolling bearing, extend downwards in 9 lower surface of bearing block of single axial rolling bearing
One hypomere cylinder isometrical with bearing block cylinder, it is fixed under locating piece 23, subordinate to be provided with subordinate in hypomere cylinder
Position block 26, subordinate's support tube 29, compression spring 24, compression spring baffle ring 25, and subordinate's motion block 21 of subordinate's high load capacity thrust bearing, subordinate
Under quiet piece 22；Subordinate's motion block is fixedly connected by two semicircular rings 10 of subordinate with subordinate support tube tight fit retaining ring；Single thrust shaft
The 12 hypomere inner circle of supporting sleeve of bearing apparatus has additional rectangle keyway, and 29 epimere inner circle of subordinate's support tube is equipped with corresponding square key
Groove, passes through between two rectangle keyways and covers the long square key 20 of unification and implement to be sequentially connected；In subordinate's motion block 21, subordinate's support tube 29
Between be equipped with radial direction oil transportation hole connect with the central oil transportation hole of motor shaft 13, while the upper surface of subordinate's motion block 21 and list thrust shaft
Possess spacing in 8 lower surface of lower part circle ring disk of bearing apparatus；Locating piece 23 is in two-way step shell-like in subordinate, two-way step set center
Engagement sleeves are moved on motor shaft 13 is cylindrical in hole, and the outside rectangular ring inner circle of quiet piece of 22 lower parts moves cooperation and is inserted in two-way step under subordinate
The top bar of set is covered on cylindrical, and four stop round pins 6 that the upper surface of the two-way step set shaft shoulder is fixed stretch under subordinate quiet piece 22
In the correspondence dowel hole of the outside rectangular ring of lower part；In subordinate 23 two-way step of locating piece set lower part it is cylindrical by key connection with
Compression spring gear thrust bearing system is hard contact working status, and two sets of being together in series for single thrust bearing simple system can not be protected
Two sets of thrust bearings of card are at preferable working status (may cause a thrust bearing system load due to tolerance
It is excessive, while another thrust bearing system load is too small or even is not subject to load completely), it can not realize that rational thrust carries
Lotus is distributed.Carrying inequality can cause single-bearing load excessive, and the friction of great load dynamics triggers burning high temperature, reduces high load capacity
The heat safe original operation characteristic of thrust bearing.Can also scaling loss bearing.
7 step of locating piece puts on quiet piece 5 under cylindrical implementation of radial positioning, and four stop are evenly distributed with respectively on locating piece 7
Round pin 6, which moves cooperation and stretches into, implements docking in the corresponding dowel hole of quiet piece of 3 outside rectangular rings.Top connection 1 is in level Four step set
Put, step set external screw thread is screwed up in 9 internal thread hole of cylinder, its basal surface abuts in quiet piece of 3 upper outside straight-flanked ring
On upper surface, quiet piece of 3 upper outside straight-flanked ring inner circles move the leave from office for coordinating and being inserted in 1 step of top connection set on high load capacity thrust bearing
Rank set is cylindrical to implement upper quiet piece 3 of radial positioning, also has stop round pin 6, dowel hole to implement docking between the two.Outside motor shaft 13
The dynamic cooperation of circle is cased with support tube 11, and 11 stage casing of support tube is cylindrical to be equipped with an annular groove, and two symmetrical half are installed in annular groove
Annulus 10, the step groove tight fit retaining ring of 4 upper surface of motion block implement consolidating for motion block 4 and support tube 11 two semicircular rings 10 are cylindrical
Fixed connection, implements motor shaft 13 on 11 upper end inner circle tight fit retaining ring of support tube, two semicircular rings of groove on motor shaft 13 are cylindrical
With being fixedly connected for support tube 11,11 bottom of support tube be with some axial bars seam step pipe, a step shell-like
12 inner circle tight fit retaining ring of supporting sleeve forced on 11 lower end step pipe of support tube is cylindrical step pipe inner circle diameter reduce
Overlay on motor shaft 13, implementation 11 lower part of support tube is fixedly connected with motor shaft, so that the support of single axial rolling bearing
Pipe 11, supporting sleeve 12, motion block are rotated with motor shaft 13.Motor shaft is equipped with central oil transportation hole, motion block 4, support tube 11, motor shaft
13 are equipped with radial direction oil transportation hole connect with the central oil transportation hole of motor shaft 13, for lubricating oil into high load capacity thrust bearing into
Row lubrication.Gap is possessed in quiet at present piece of 5 upper surfaces of installation with 4 lower surface of motion block, this gap is within 1mm.
When oil-immersed pump working environment changes, for example oil well depth larger amplitude deepens (depth increasing value is within one times),
Then oil-immersed pump high load capacity thrust bearing bearing load increase, and power motor power have it is more than needed, or use power motor rotating speed
The method of reduction, can also pump oil.At this moment difficulties are the load-carrying abilities that must increase high load capacity thrust bearing.Conventional
Method is not to increase the outside diameter (because outside diameter increases, volume size also increases) of high load capacity thrust bearing, but uses plain mode
The high load capacity thrust bearing of concatenation one isometrical size of installation.We do overtesting discovery：Since machined piece can there are one
Fixed tolerance, and circle is fixedly sleeved in the common lower tubulose body for stopping circle 25；Compression spring baffle ring 25 is in a lower tubular body and one
Upper ring plate docks shape；Between 25 upper ring plate upper surface of compression spring baffle ring and 23 two-way step of subordinate's locating piece set shaft shoulder lower surface
Compression spring 24 is installed；Locating piece 26 is a round nut under subordinate, and round nut external screw thread is screwed up in the lower part of hypomere cylinder
In screw thread, its upper surface is overlayed with 25 upper ring plate following table surface elastic of compression spring baffle ring, and round nut inner circle passes through key connection and compression spring
The circle implementation in vitro of 25 times tubuloses of baffle ring is fixedly sleeved.
The round nut of locating piece 26 is cylindrical under subordinate is equipped with an annular groove, is oppressed after being positioned for round nut with screw
Annular groove groove width positions, and external screw thread is positioned at after deforming in hypomere cylinder.25 inside and outside circle of compression spring baffle ring passes through key connection point
It is not fixedly sleeved with locating piece in subordinate 23, round nut, it ensure that locating piece 25 does not rotate in a circumferential direction in subordinate.
The supporting sleeve 7 of single axial rolling bearing is rotated with motor shaft, so as to drive subordinate's support tube 29, subordinate's motion block 21
Rotate.
The pump housing not pump oil when, the precompressed elastic force of quiet piece carrying compression spring on single axial rolling bearing, when pump housing pump oil, holds
Carry the axial force pushed；Since axial rolling bearing big load is mainly downward axial force, so can not in hypomere cylinder
Quiet piece is installed in subordinate, quiet piece 22, subordinate's motion block 21 under subordinate are only installed, so as to simplify structure.
Just theory of mechanics of the present invention illustrates below, and for the ease of explaining, former single axial rolling bearing is considered as higher level
Thrust bearing system, hypomere cylinder inner cylinder inner structure are considered as from the point of view of subordinate's thrust bearing system：
Structure of the present invention is as shown in Figure 1, subordinate's thrust bearing system provides axial elasticity support force using compression spring, due to peace
It is adjustable to hold locating piece axial location in level, therefore can apply as needed can in a certain range when the compression spring 24 is installed
The precompression of tune.When submersible electric motor protector double thrust bearing system is not subject to external load, subordinate's thrust bearing system
Under subordinate's motion block 21 and subordinate between quiet piece 22 and the motion block 4 of higher level's thrust bearing system and it is quiet piece 3 upper between have it is certain
Pretightning force (i.e. the precompressed elastic force of compression spring).When the axial direction for the pushing being applied in submersible electric motor protector double thrust bearing system
Load gradually increases (fixed watt thrust bearing system is not more than 2.5 tons, and floating-bush thrust bearing system is not more than 5 tons) from zero
During, the load of subordinate's thrust bearing system remains unchanged；Higher level's thrust bearing system motion block and upper quiet piece 3 of load are gradual
Decrease up to and drop to zero, the motion block of subordinate and higher level's thrust bearing is moved downwardly until the motion block of higher level's thrust bearing system afterwards
4 with quiet piece of 5 contact positions.When the axial load of submersible electric motor protector double thrust bearing system continues increase, due to bullet
Property decrement only produces small change (higher level's thrust bearing motion block amount of altering is about 1mm or so), therefore its elastic force is protected substantially
Hold constant, i.e. the load of subordinate's thrust bearing system is held essentially constant, higher level's thrust bearing motion block 4 and under between quiet piece 5
Load gradually increases (fixed watt maximum permissible value is 2.5 tons, and floating-bush maximum permissible value is 5 tons), when higher level's thrust bearing
When load is maximum load rating, the axial load born of submersible electric motor protector double thrust bearing system reaches maximum rated
Value (double fixed tile systems are 5 tons, and double floating tile systems are 10 tons).Higher level's thrust bearing system, subordinate thrust bearing system
The substantially even weighing apparatus of two thrust bearing bearing capacities, will not produce the bearing capacity of simple duplex bearing tandem significantly non-uniform phenomenon.
Claims (1)
1. the double thrust bearing device of electric submersible pump unit motor protecter, including single axial rolling bearing, it is characterised in that：
Extend downwards a hypomere cylinder isometrical with bearing block cylinder for bearing block (9) lower surface of single axial rolling bearing, under
Locating piece (26) under locating piece in subordinate (23), subordinate, subordinate's support tube (29), compression spring (24), pressure are installed in cylindrical section body
Under spring baffle ring (25), and subordinate's motion block (21) of subordinate's high load capacity thrust bearing, subordinate quiet piece (22)；Subordinate's motion block is under
Two semicircular rings (10) of level are fixedly connected with subordinate support tube tight fit retaining ring；Supporting sleeve (12) hypomere of single axial rolling bearing
Inner circle has additional rectangle keyway, and subordinate's support tube (29) epimere inner circle is equipped with corresponding rectangle keyway, leads between two rectangle keyways
The long square key (20) of set unification is crossed to implement to be sequentially connected；It is equipped with and electricity between subordinate's motion block (21), subordinate's support tube (29)
The radial direction oil transportation hole of arbor (13) center oil transportation hole connection, while the upper surface of subordinate's motion block (21) and single axial rolling bearing
Possess spacing in lower part circle ring disk (8) lower surface；Locating piece (23) is in two-way step shell-like in subordinate, and two-way step set medium pore moves
Engagement sleeves are on motor shaft (13) is cylindrical, and the outside rectangular ring inner circle of quiet piece of (22) lower part moves cooperation and is inserted in two-way step under subordinate
The top bar of set is covered on cylindrical, and four stop round pins (6) that the upper surface of the two-way step set shaft shoulder is fixed stretch under subordinate quiet piece
(22) in the correspondence dowel hole of the outside rectangular ring of lower part；Lower part is cylindrical passes through key for locating piece (23) two-way step set in subordinate
Connection and circle in the lower tubulose body of compression spring baffle ring (25) are fixedly sleeved；Compression spring baffle ring (25) is in a lower tubular body and a upper circle
Ring flat-plate docks shape；Between compression spring baffle ring (25) upper ring plate upper surface and the two-way step set shaft shoulder lower surface of subordinate's locating piece (23)
Compression spring (24) is installed；Locating piece (26) is a round nut under subordinate, and round nut external screw thread is screwed up under hypomere cylinder
In portion's internal thread, its upper surface is overlayed with compression spring baffle ring (25) upper ring plate following table surface elastic, and round nut inner circle passes through key connection
It is fixedly sleeved with the circle implementation in vitro of tubulose under compression spring baffle ring (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510807662.4A CN106402170B (en) | 2015-11-20 | 2015-11-20 | The double thrust bearing device of electric submersible pump unit motor protecter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510807662.4A CN106402170B (en) | 2015-11-20 | 2015-11-20 | The double thrust bearing device of electric submersible pump unit motor protecter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106402170A CN106402170A (en) | 2017-02-15 |
| CN106402170B true CN106402170B (en) | 2018-05-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510807662.4A Active CN106402170B (en) | 2015-11-20 | 2015-11-20 | The double thrust bearing device of electric submersible pump unit motor protecter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106402170B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109296344A (en) * | 2018-11-26 | 2019-02-01 | 山东泽元石油机械有限公司 | Submersible screw pump retarder protector |
| CN109510379B (en) * | 2018-11-26 | 2023-11-17 | 歌尔股份有限公司 | Motor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4557610A (en) * | 1982-09-02 | 1985-12-10 | Matsushita Electric Industrial Co., Ltd. | Dynamic pressure type fluid bearing device |
| JP3997115B2 (en) * | 2002-06-17 | 2007-10-24 | Ｎｔｎ株式会社 | Hydrodynamic bearing device |
| CN101458003A (en) * | 2007-12-12 | 2009-06-17 | 何君 | Cold air machine driven by floating bearing type high-speed electric machine with contact protection bearing |
| CN202055973U (en) * | 2011-04-15 | 2011-11-30 | 重庆云河水电股份有限公司 | Self-lubricating radial thrust bearing of runner pump |
| CN202300967U (en) * | 2011-10-14 | 2012-07-04 | 天津市百成油田采油设备制造有限公司 | One-stage seal electrical submersible pump protector with one independent settling chamber |
-
2015
- 2015-11-20 CN CN201510807662.4A patent/CN106402170B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4557610A (en) * | 1982-09-02 | 1985-12-10 | Matsushita Electric Industrial Co., Ltd. | Dynamic pressure type fluid bearing device |
| JP3997115B2 (en) * | 2002-06-17 | 2007-10-24 | Ｎｔｎ株式会社 | Hydrodynamic bearing device |
| CN101458003A (en) * | 2007-12-12 | 2009-06-17 | 何君 | Cold air machine driven by floating bearing type high-speed electric machine with contact protection bearing |
| CN202055973U (en) * | 2011-04-15 | 2011-11-30 | 重庆云河水电股份有限公司 | Self-lubricating radial thrust bearing of runner pump |
| CN202300967U (en) * | 2011-10-14 | 2012-07-04 | 天津市百成油田采油设备制造有限公司 | One-stage seal electrical submersible pump protector with one independent settling chamber |
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| Publication number | Publication date |
|---|---|
| CN106402170A (en) | 2017-02-15 |
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Effective date of registration: 20190807 Address after: Room 401, Building No. 1618, Xinyang Road, Fengxian District, Shanghai, 201413 Patentee after: Shanghai Feizhou Boyuan Petroleum Equipment Co.,Ltd. Address before: Room 1084, Building 4, No. 580 Shenzhou Road, Fengxian District, Shanghai, 201400 Patentee before: SHANGHAI JUMA PETROLEUM TECHNOLOGY SERVICE Co.,Ltd. |
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| CP03 | Change of name, title or address | ||
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Address after: Room 401, Building 2 and Room 102, Building 4, No. 1618 Xinyang Road, Fengxian District, Shanghai, 2014 Patentee after: Shanghai Feizhou Boyuan Material Technology Co.,Ltd. Address before: 201413 Room 401, building 2, 1618 Xinyang Road, Fengxian District, Shanghai Patentee before: Shanghai Feizhou Boyuan Petroleum Equipment Co.,Ltd. |