CN113828874A - Movable sealing device and sealing method for contour profile movable type electrolytic machining - Google Patents
Movable sealing device and sealing method for contour profile movable type electrolytic machining Download PDFInfo
- Publication number
- CN113828874A CN113828874A CN202111050456.5A CN202111050456A CN113828874A CN 113828874 A CN113828874 A CN 113828874A CN 202111050456 A CN202111050456 A CN 202111050456A CN 113828874 A CN113828874 A CN 113828874A
- Authority
- CN
- China
- Prior art keywords
- sealing
- base body
- flexible belt
- electrolytic machining
- grooves
- 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.)
- Granted
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 82
- 238000003754 machining Methods 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000003792 electrolyte Substances 0.000 claims abstract description 15
- 210000000078 claw Anatomy 0.000 claims description 6
- 239000000758 substrate Substances 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000006056 electrooxidation reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000003701 mechanical milling Methods 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H3/00—Electrochemical machining, i.e. removing metal by passing current between an electrode and a workpiece in the presence of an electrolyte
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H11/00—Auxiliary apparatus or details, not otherwise provided for
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
The invention belongs to the technical field of electrolytic machining, and particularly relates to a movable sealing device and a movable sealing method for outline profile electrolytic machining. The method aims to solve the problems that in the prior art, electrolyte leakage caused by long processing distance between a processing section and the side wall of a part causes flow field disorder to influence processing precision and surface quality, and even a cathode is burnt out due to short circuit. The movable type electrolytic machining movable sealing device with the outline profile is provided with two movable sealing devices, the two movable sealing devices are respectively arranged in mounting grooves on two sides of a base body, the movable sealing device structurally comprises a supporting shell with a U-shaped section, a pressure spring is arranged between an F surface of the supporting shell and the base body, a plurality of rotating wheels are uniformly distributed in the grooves of the supporting shell, flexible belts are wound on the rotating wheels, two annular sealing grooves are formed in the A surface of each flexible belt, and the sealing grooves are matched with sealing teeth on the base body to form labyrinth sealing; the surface B of the flexible belt is provided with a gear tooth structure and annular grooves symmetrically arranged on two sides of the gear tooth.
Description
Technical Field
The invention belongs to the technical field of electrolytic machining, and particularly relates to a movable sealing device and a movable sealing method for outline profile electrolytic machining.
Background
The processing of the profile of the tensile metal part with high hardness and large length has been a difficult problem in processing and manufacturing. In the process of mechanical milling and grinding, due to the fact that the length of a part is large, the hardness of a material is high, the machining efficiency is low, the abrasion of a cutter is serious, the cost is high, machining stress and the like exist, and the part is difficult to form at one time.
The electrochemical machining technology applies the electrochemical corrosion principle, has the advantages of high machining efficiency, no cutter loss, no limitation of material hardness, good surface quality and the like, and can realize one-step machining and forming of the stretched metal parts at low cost and high efficiency.
In the electrolytic machining, a flow field is crucial to the precision and the surface quality of the stretched part, in the process of machining the profile of the stretched part by adopting a lateral flow type liquid supply electrolytic machining, a base body (consisting of a flow guide section, a machining section and a back pressure section) translates along the stretching direction of a workpiece, elastic sealing gaskets are arranged between the flow guide section, the back pressure section and the workpiece of the base body to prevent electrolyte from leaking, however, the electrolyte can still leak in a gap between the machining section and the side wall of the part, if the sealing strip is tightly attached to the side wall of the part for sealing, the sliding friction between the sealing strip and the side wall of the part can certainly cause serious abrasion of the sealing strip, after long-distance machining, the electrolyte can leak in the side wall of the part to cause flow field disorder, the machining precision and the surface quality are influenced, even short circuit occurs, and a cathode is burnt.
Disclosure of Invention
In view of the above, the present invention provides a mobile sealing device and a mobile sealing method for an outline profile mobile type electrochemical machining, which solve the problems in the prior art that the machining precision and the surface quality are affected by the flow field disorder caused by the electrolyte leakage due to the long machining distance between the machining section and the side wall of the part, and even the cathode is burnt out due to the short circuit.
In order to solve the problems in the prior art, the technical scheme adopted by the invention is as follows: the movable sealing device for the contour profile movable type electrolytic machining is structurally characterized by comprising two movable sealing devices, wherein the two movable sealing devices are respectively arranged in mounting grooves on two sides of a base body, each movable sealing device structurally comprises a supporting shell with a U-shaped section, a pressure spring is arranged between the surface F of the supporting shell and the base body, a plurality of rotating wheels are uniformly distributed in the grooves of the supporting shell, flexible belts are wound on the rotating wheels, two annular sealing grooves are formed in the surface A of each flexible belt, and the sealing grooves are matched with sealing teeth on the base body to form labyrinth sealing; the surface B of the flexible belt is provided with a gear tooth structure and annular grooves symmetrically arranged on two sides of the gear tooth.
Furthermore, the structure of swiveling wheel includes that the ring piece of both sides and set up between the ring piece and the flexible band pulley teeth of a cogwheel structure of cooperateing, and two ring pieces of swiveling wheel cooperate with the ring channel of flexible band pulley teeth both sides.
Furthermore, the E surface of the supporting shell is provided with a rectangular block matched with the base body limiting groove, and the supporting shell and the base body are driven to move at the same speed through the rectangular block.
Further, the rotating wheel is arranged on the wheel shaft and rotates around the wheel shaft axis through the bearing.
Furthermore, the pressure spring is sleeved on the telescopic rod between the support shell and the base body.
Furthermore, the two sides of the supporting shell are respectively hinged with a claw, and a base body is welded with a cylindrical protrusion matched with the claw.
Furthermore, the diameter of the circular ring piece on the rotating wheel is larger than the diameter of the tooth crest circle of the gear tooth structure.
Furthermore, the width of two annular sealing grooves on the surface A of the flexible belt is larger than that of a sealing tooth matched with the base body, and the length of the sealing tooth is between the length of the processing section and the attaching length of the flexible belt and the side wall of the workpiece.
Furthermore, the sections of the sealing groove and the sealing tooth are rectangular.
The sealing method of the movable type electrolytic machining movable sealing device with the outline profile comprises the following steps:
during electrolytic machining, the pressure spring arranged on the surface F of the support shell pushes the support shell, so that the flexible belt is tightly attached to the side wall of the workpiece; two annular sealing grooves are formed in the surface A of the flexible belt and are matched with two sealing teeth on the base body to form labyrinth seal, so that electrolyte is prevented from leaking; clamping jaws are hinged to two sides of the supporting shell respectively, and cylindrical protrusions are welded on the base body; after the processing is finished, the clamping jaws of the supporting shell are matched with the cylindrical protrusions on the base body, namely, the pressure springs are pressed, so that the movable sealing device is far away from the side wall of the workpiece, and the base body is convenient to disassemble.
Compared with the prior art, the invention has the following beneficial effects:
1) the rolling friction is adopted between the flexible belt and the side wall of the workpiece, the friction resistance is small, and the service life of the flexible belt can be prolonged;
2) the elastic force of the pressure spring can be converted into the sticking pressure of the flexible belt to the side wall of the workpiece through transmission, and the pressure spring has the advantages that the flexible belt can be enabled to cling to the side wall of the workpiece to move in working;
3) in the invention, the flexible belt moves close to the side wall of the workpiece, and the sealing groove of the surface A of the flexible belt is matched with the sealing teeth of the base body to form a labyrinth seal, so that the leakage of electrolyte is effectively prevented;
4) the movable sealing device is matched with the base body through the mounting groove, and is convenient to disassemble.
Drawings
FIG. 1 is a top view of an assembly of a workpiece, a substrate, and a moving seal according to an embodiment of the present invention;
FIG. 2 is a half sectional view of FIG. 1; in the figure, the direction of an arrow in a partially enlarged view is the flow direction of the electrolyte;
FIG. 3 is a perspective view of the moving seal of the present invention;
FIG. 4 is a schematic view of a rotor according to the present invention;
in the figure, 01-base; 02-workpiece; 03-moving the sealing device;
031-rotating wheel, 032-flexible belt, 033-wheel shaft, 034-bearing, 035-supporting shell, 036-pressure spring, 037-telescopic rod, 038-claw, 039-cylindrical protrusion.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example (b):
in the process of machining the profile of the tensile part by adopting lateral flow type liquid supply electrolysis, the substrate translates along the tensile direction of the workpiece. Elastic sealing gaskets are arranged among the flow guide section, the back pressure section and the workpiece of the base body, and electrolyte is prevented from being leaked. The invention discloses a movable sealing device for electrochemical machining of an outline profile of a tensile part, and aims to prevent the side leakage of electrolyte at a machining section and improve the machining stability.
The invention provides a movable type electrochemical machining movable sealing device with profile surfaces, as shown in figures 1-3, the number of the movable sealing devices is 2, the movable sealing devices are symmetrically arranged in mounting grooves on two sides of a base body 01, each movable sealing device comprises 4 rotating wheels 031, a flexible belt 032, 4 wheel shafts 033, 8 bearings 034, a supporting shell 035, 3 pressure springs 036, 3 telescopic rods 037 and 2 clamping jaws 038;
a pressure spring 036 is arranged between the surface F of the support shell 035 and the base body 01, and the pressure spring 036 is sleeved on a telescopic rod 037 between the support shell 035 and the base body 01; 4 shaft 033 and bearing 034 are arranged on the supporting shell 035, 4 rotating wheels 031 are matched with the shaft 033 to rotate around the axis of the shaft 033, and a flexible belt 032 is wound on the rotating wheels 031, wherein the flexible belt 032 is made of wear-resistant and aging-resistant rubber products, such as neoprene.
Two annular sealing grooves are formed in the surface A of the flexible belt 032, and a gear tooth structure and annular grooves symmetrically formed in the two sides of the gear tooth are formed in the surface B of the flexible belt 032; the rotating wheel 031 is provided with a gear tooth structure matched with the gear teeth of the flexible belt 032, two sides of the gear teeth are provided with circular ring pieces, and when the rotating wheel 031 rotates, the gear teeth are meshed to drive the flexible belt 032 to synchronously rotate; the ring piece presses the flexible belt 032 tightly on the side wall of the workpiece, and meanwhile, the flexible belt 032 can be prevented from falling off; the diameter of a ring on the rotating wheel 031 should be larger than the diameter of the addendum circle of the gear tooth structure; see fig. 3, 4;
the matrix 01 consists of a flow guide section i, a processing section j and a back pressure section k, and as shown in fig. 1 and 2, the flow guide and the back pressure are carried out on the electrolyte; base member 01 sets up directly over work piece 02, and base member 01 water conservancy diversion section i and backpressure section k lower surface are provided with the surface coordination of elastic sealing pad and work piece 02, prevent that electrolyte from revealing, and removal sealing device 03 sets up in the mounting groove of base member 01 both sides, its aim at of removal sealing device seals the clearance of processing section both sides.
The surface E of the support shell 035 is fixedly provided with 3 rectangular blocks which are matched with the limiting grooves on the base body 01; when the substrate 01 translates along the stretching direction of the workpiece 02, the support shell 035 can be driven to move, as shown in fig. 2 and 3.
The sections of the sealing grooves and the sealing teeth are rectangular.
The sealing method of the profile movable type electrolytic machining movable sealing device is shown in figure 2:
during electrolytic machining, the pressure spring 036 arranged on the surface F of the support shell 035 pushes the support shell 035, so that the flexible band 032 is tightly attached to the side wall of the workpiece; the surface A of the flexible belt 032 is provided with two annular sealing grooves, and the sealing grooves and two sealing teeth on the base body 01 are matched to form labyrinth seals so as to prevent electrolyte from leaking; when the flexible belt 032 is pressed against the sidewall of the workpiece 02, the sidewall of the sealing groove and the sidewall of the sealing tooth do not interfere with each other, and the length of the sealing tooth should not be greater than the length of the joint between the flexible belt 032 and the sidewall of the workpiece 02. The two sides of the supporting shell 035 are respectively hinged with a claw 038, and a cylindrical protrusion 039 is welded on the base body 01; after the processing is finished, the clamping jaws 038 are matched with the cylindrical protrusions 039, namely the pressure springs 036 are pressed, so that the movable sealing device can be far away from the side wall of the workpiece 02, and the base body 01 can be conveniently detached.
In the electrolytic machining process, the pressure of the pressure spring 036 is transmitted to the 4 rotating wheels 031 through the support shell 035, and the flexible belt 032 can roll tightly against the side wall of the workpiece through the sticking pressure of the 4 rotating wheels; the seal groove on the A surface of the flexible belt 032 is matched with the seal teeth on the base body 01 to form labyrinth seal, and electrolyte leakage is effectively prevented.
The invention is not limited to the examples, and any equivalent changes to the technical solution of the invention by a person skilled in the art after reading the description of the invention are covered by the claims of the invention.
Claims (10)
1. Portable electrolytic machining of profile removes sealing device, removal sealing device (03) have two, set up respectively in the mounting groove of base member (01) both sides, its characterized in that: the structure of the movable sealing device (03) comprises a supporting shell (035) with a U-shaped section, a pressure spring (036) is arranged between the surface F of the supporting shell (035) and the base body (01), a plurality of rotating wheels (031) are uniformly distributed in the groove of the supporting shell (035), a flexible belt (032) is wound on the rotating wheels (031), two annular sealing grooves are formed in the surface A of the flexible belt (032), and the sealing grooves are matched with sealing teeth on the base body (01) to form labyrinth sealing; the surface B of the flexible belt (032) is provided with a gear tooth structure and annular grooves symmetrically arranged at two sides of the gear tooth.
2. The moving contour type electrolytic machining moving seal device according to claim 1, characterized in that: the structure of swiveling wheel (031) includes the ring piece of both sides and set up between the ring piece with flexible belt (032) teeth of a cogwheel structure, two ring pieces of swiveling wheel (031) cooperate with the ring channel of flexible belt (032) teeth of a cogwheel both sides.
3. The moving contour type electrolytic machining moving seal device according to claim 1 or 2, characterized in that: the surface E of the support shell (035) is provided with a rectangular block matched with the limit groove of the base body (01), and the support shell (035) and the base body (01) are driven to move at the same speed through the rectangular block.
4. The moving contour type electrolytic machining moving seal device according to claim 3, characterized in that: the rotating wheel (031) is arranged on the wheel shaft (033) and rotates around the axis of the wheel shaft (033) by means of a bearing (034).
5. The moving contour type electrolytic machining moving seal device according to claim 4, characterized in that: the pressure spring (036) is sleeved on the telescopic rod (037) between the support shell (035) and the base body (01).
6. The moving contour type electrolytic machining moving seal device according to claim 5, characterized in that: the two sides of the supporting shell (035) are respectively hinged with a claw (038), and the base body (01) is welded with a cylindrical protrusion (039) matched with the claw (038).
7. The moving contour type electrolytic machining moving seal device according to claim 6, characterized in that: the diameter of the circular ring piece on the rotating wheel (031) is larger than the diameter of the tooth top circle of the gear tooth structure.
8. The contoured profile mobile electrochemical machining mobile seal apparatus of claim 7, wherein: the width of two annular sealing grooves on the A surface of the flexible belt (032) is larger than that of a sealing tooth matched with the base body (01), and the length of the sealing tooth is between the length of a processing section and the length of the side wall joint of the flexible belt (032) and the workpiece (02).
9. The contoured profile mobile electrochemical machining mobile seal apparatus of claim 8, wherein: the sections of the sealing groove and the sealing tooth are rectangular.
10. The sealing method of a contour traveling electrochemical machining moving seal apparatus according to claim 1: the method is characterized in that:
during electrolytic machining, a pressure spring (036) arranged on the surface F of the support shell (035) pushes the support shell (035) to enable the flexible belt (032) to cling to the side wall of the workpiece (02); two annular sealing grooves are formed in the surface A of the flexible belt (032) and matched with two sealing teeth on the base body (01) to form labyrinth seal, so that electrolyte is prevented from leaking; claws (038) are hinged to two sides of the support shell (035), and cylindrical protrusions (039) are welded on the base body (01); after the machining is finished, the clamping jaws (038) of the supporting shell (035) are matched with the cylindrical protrusions (039) on the base body (01), namely, the pressure springs (036) are pressed, so that the movable sealing device is far away from the side wall of the workpiece (02), and the base body (01) is convenient to disassemble.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111050456.5A CN113828874B (en) | 2021-09-08 | 2021-09-08 | Movable sealing device and sealing method for contour profile movable type electrolytic machining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111050456.5A CN113828874B (en) | 2021-09-08 | 2021-09-08 | Movable sealing device and sealing method for contour profile movable type electrolytic machining |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113828874A true CN113828874A (en) | 2021-12-24 |
| CN113828874B CN113828874B (en) | 2022-10-14 |
Family
ID=78958764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111050456.5A Expired - Fee Related CN113828874B (en) | 2021-09-08 | 2021-09-08 | Movable sealing device and sealing method for contour profile movable type electrolytic machining |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113828874B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH407168A (en) * | 1961-11-08 | 1966-02-15 | Licentia Gmbh | Non-contact shaft seal for turbo machinery |
| EP0259691A2 (en) * | 1986-09-08 | 1988-03-16 | AEG-Elotherm GmbH | Electrode carrying head for electrochemical machining |
| CN104741720A (en) * | 2015-03-27 | 2015-07-01 | 李冬庆 | Internal pressing type steel strip sealing liquid tank device |
| CN109277654A (en) * | 2018-09-12 | 2019-01-29 | 南京航空航天大学 | Rotation print Electrolyzed Processing sealing liquid apparatus and method |
| CN111570943A (en) * | 2020-05-20 | 2020-08-25 | 南京农业大学 | Electrolytic machining method and process device for groove structure of wall surface of revolving body part |
| CN211471625U (en) * | 2019-10-12 | 2020-09-11 | 昆山东威科技股份有限公司 | Sealing device, container and workpiece processing device |
| CN211647909U (en) * | 2020-01-08 | 2020-10-09 | 盐城市永盛门窗科技有限公司 | Sealing device for door and window |
| CN112222548A (en) * | 2020-10-30 | 2021-01-15 | 西安工业大学 | Electrolyte rectification and clearance fine adjustment device for electrolytic machining of profile surface |
-
2021
- 2021-09-08 CN CN202111050456.5A patent/CN113828874B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH407168A (en) * | 1961-11-08 | 1966-02-15 | Licentia Gmbh | Non-contact shaft seal for turbo machinery |
| EP0259691A2 (en) * | 1986-09-08 | 1988-03-16 | AEG-Elotherm GmbH | Electrode carrying head for electrochemical machining |
| CN104741720A (en) * | 2015-03-27 | 2015-07-01 | 李冬庆 | Internal pressing type steel strip sealing liquid tank device |
| CN109277654A (en) * | 2018-09-12 | 2019-01-29 | 南京航空航天大学 | Rotation print Electrolyzed Processing sealing liquid apparatus and method |
| CN211471625U (en) * | 2019-10-12 | 2020-09-11 | 昆山东威科技股份有限公司 | Sealing device, container and workpiece processing device |
| CN211647909U (en) * | 2020-01-08 | 2020-10-09 | 盐城市永盛门窗科技有限公司 | Sealing device for door and window |
| CN111570943A (en) * | 2020-05-20 | 2020-08-25 | 南京农业大学 | Electrolytic machining method and process device for groove structure of wall surface of revolving body part |
| CN112222548A (en) * | 2020-10-30 | 2021-01-15 | 西安工业大学 | Electrolyte rectification and clearance fine adjustment device for electrolytic machining of profile surface |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113828874B (en) | 2022-10-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109570932B (en) | Involute type micro-groove composite texture antifriction surface | |
| KR20140066732A (en) | Rolling stand roll neck seal | |
| CN113828874B (en) | Movable sealing device and sealing method for contour profile movable type electrolytic machining | |
| CN111408751A (en) | Front-mounted full-stroke pneumatic chuck | |
| CN212094397U (en) | Four-jaw double-acting hollow electric chuck | |
| CN207421147U (en) | Withdrawal straightening machine back lining bearing | |
| CN205572148U (en) | Quadruplex bit plane grinding device | |
| CN110701474A (en) | Liner test fixture | |
| CN201487436U (en) | Novel rotary joint | |
| CN212761177U (en) | Hydraulic drive chuck | |
| CN205315704U (en) | Coal -winning machine planetary mechanism floating oil seal structure | |
| CN214699188U (en) | Sealing structure for supporting roll of straightening machine | |
| CN101265949A (en) | Three lips contact type seal bearing | |
| CN212885103U (en) | Front-mounted pneumatic chuck | |
| CN210938509U (en) | Processing device for foamed rubber sealing ring | |
| CN211247607U (en) | Copper sleeve fast inlaying mechanism | |
| CN210854650U (en) | Anti-slip type slitting machine for film guiding production | |
| CN210647808U (en) | Doctor blade wire drawing production line for piston ring | |
| JP2013145028A (en) | Sealing type roll bearing | |
| CN217736048U (en) | Split type retainer for main shaft bearing of wind driven generator | |
| CN208321621U (en) | A kind of novel support roll | |
| CN115126875B (en) | Shaft end mechanical sealing device suitable for powder conveying equipment | |
| CN212615892U (en) | Self-lubricating bearing | |
| CN111251043A (en) | Lead screw supporting device | |
| CN203809519U (en) | U-shaped combination bearing sealing device of waterproof supporting roller |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20221014 |