CN107363720A - Suitable for the liquid-spraying type on-line dynamic balancing terminal of big external diameter external thread grinder main shaft - Google Patents
Suitable for the liquid-spraying type on-line dynamic balancing terminal of big external diameter external thread grinder main shaft Download PDFInfo
- Publication number
- CN107363720A CN107363720A CN201710510339.XA CN201710510339A CN107363720A CN 107363720 A CN107363720 A CN 107363720A CN 201710510339 A CN201710510339 A CN 201710510339A CN 107363720 A CN107363720 A CN 107363720A
- Authority
- CN
- China
- Prior art keywords
- swivel joint
- emery wheel
- main shaft
- dynamic balancing
- external diameter
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/04—Headstocks; Working-spindles; Features relating thereto
- B24B41/042—Balancing mechanisms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
- B23G1/00—Thread cutting; Automatic machines specially designed therefor
- B23G1/36—Thread cutting; Automatic machines specially designed therefor by grinding
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M1/00—Testing static or dynamic balance of machines or structures
- G01M1/30—Compensating unbalance
- G01M1/32—Compensating unbalance by adding material to the body to be tested, e.g. by correcting-weights
- G01M1/323—Compensating unbalance by adding material to the body to be tested, e.g. by correcting-weights using balancing liquid
Abstract
A kind of liquid-spraying type on-line dynamic balancing terminal suitable for big external diameter external thread grinder main shaft, including the emery wheel chassis being connected with main shaft, emery wheel chassis connects with emery wheel end cap steps up emery wheel；Emery wheel chassis is connected with swivel joint rotor, and swivel joint rotor and swivel joint stator gap coordinate, and swivel joint stator is fixed on casing；There is the second delivery hole on swivel joint stator, there is annular intake chute on the external diameter of swivel joint rotor, swivel joint rotor is evenly distributed the first delivery hole, the fluid chamber being evenly distributed corresponding on annular intake chute and emery wheel chassis is connected respectively at the both ends of first delivery hole, passes through pvc pipe, snap joint, the second delivery hole, annular intake chute and the first delivery hole to the fluid passage that sealing is formd fluid chamber from hydraulic system；The present invention realizes the automatic on-line dynamic balancing in Grinding Process of big external diameter external thread grinder main shaft and compensated, and has closed runner, will not cause liquid splash, is effectively improved the quality and efficiency of grinding.
Description
Technical field
The present invention relates to grinding machine spindle on-line dynamic balancing field of terminal technology, and in particular to one kind is applied to the outer spiral shell of big external diameter
The liquid-spraying type on-line dynamic balancing terminal of line grinding machine spindle.
Background technology
Main working parts of the grinding machine spindle as grinding machine, whether is its state quality in Grinding Process, will be straight
The quality for influenceing to process part is connect, wherein amount of unbalance will cause main shaft to produce larger vibration, and then influence to process zero
The quality of part.In processing site, it is necessary to carry out grinding finishing, such as the raceway of leading screw to some large-scale workpiece, at this moment
Need the external thread grinder of big external diameter.The rotating speed of the external thread grinder main shaft of big external diameter is relatively low, but due on main shaft
The radius of emery wheel is bigger, makes the linear velocity of stone part larger；Emery wheel is by the uneven abrasive grain of size simultaneously
Composition, particle comes off inevitable with uneven wear in grinding process, and waste can not be ignored；Again because the mill of emery wheel
Damage part is more close to working portions, make caused by amount of unbalance relative to other small external diameters grinding machine apart from axle center distance more
Far, the out-of-balance force of its effect will be bigger, and the influence to the machining accuracy of grinding machine is more serious.Therefore for the outer spiral shell of big external diameter
Line grinding machine spindle enters action balance and is very important.
What industry spot was conventional at present is static balance method mostly for big external diameter external thread grinder spindle dynamic balance method, this
Kind of method needs to carry out in the state of shutdown, wastes time and energy, with greater need for frequent dismounting grinding rotor, and balance quality compared with
It is low, the static unbalance of emery wheel can only be eliminated, it is limited to the counterbalance effect of grinding machine shafting, and emery wheel can not be produced in the operating condition
Raw amount of unbalance is timely corrected, be directed to this big external diameter external thread grinder main shaft on-line dynamic balancing cause it is more next
More people's concerns.
Big external diameter external thread grinder chief axis on-line dynamic poise technology is not shut down during can realizing dynamic balancing, motion process
In many advantages, such as compensating amount of unbalance at any time, and the core of on-line dynamic balancing technology is on-line dynamic balancing terminal, online at present
Dynamic balancing terminal is broadly divided into electric motor type, electromagnetic type and liquid-spraying type by working method, wherein liquid-spraying type on-line dynamic balancing terminal by
In it is simple and reliable for structure, be easily achieved, and self-lock ability is strong, is most widely used.Liquid-spraying type on-line dynamic balancing terminal utilizes liquid
Body carries out amount of unbalance compensation, and general balanced termination has the single chamber of three or more, and liquid follows main shaft to revolve in cavity volume
Change the line of production raw corresponding centrifugal force, by control the size of the injection liquid quality in different cavity volumes offset the imbalance of main shaft from
Mental and physical efforts, realize the balance of rotor.But during liquid-spraying type on-line dynamic balancing terminal installation is injected liquid into, due to not having
Airtight passage, cause liquid easily to splash, make the liquid in inflow terminal device cavity volume less, can not only pollute, and
The effect of on-line dynamic balancing can be had a strong impact on, influences the quality of workpieces processing.
The content of the invention
The shortcomings that in order to overcome above-mentioned prior art, it is an object of the invention to provide one kind to be applied to big external diameter external screw thread
The liquid-spraying type on-line dynamic balancing terminal of grinding machine spindle, it is automatic in Grinding Process to realize big external diameter external thread grinder main shaft
On-line dynamic balancing compensates, and the effect of on-line dynamic balancing is good, improves the quality and efficiency of grinding.
In order to reach object above, the present invention is solved by following technical solution：
A kind of liquid-spraying type on-line dynamic balancing terminal suitable for big external diameter external thread grinder main shaft, including emery wheel chassis 2, sand
Wheel chassis 2 is connected with main shaft 11, and emery wheel chassis 2 and the connection of emery wheel end cap 3 step up emery wheel 1；The central shaft on emery wheel chassis 2 passed through
Cross and be connected with swivel joint rotor 10, the axis hole of swivel joint rotor 10 and the gap of swivel joint stator 17 coordinate, rotation
Joint stator 17 is fixed on casing 24；
There are more than 3 the second delivery holes 29 equidistantly distributed, each second drain on described swivel joint stator 17
A snap joint 28 is mounted on hole 29, each snap joint 28 is connected by respective pvc pipe 27 with hydraulic system 26；
There are more than the 3 annular intake chutes 18 equidistantly distributed on the external diameter of described swivel joint rotor 10, annular intake chute 18 exists
It is corresponding with the second delivery hole 29 on swivel joint stator 17 in the radial direction；Swivel joint rotor 10 is evenly distributed 3
More than the first delivery hole 16, the both ends of the first delivery hole 16 respectively with the annular intake chute 18 and sand on swivel joint rotor 10
The fluid chamber 15 being accordingly evenly distributed on wheel chassis 2 is connected, behind the front end and emery wheel chassis 2 of swivel joint rotor 10
The close contact at end, it ensure that the sealing of fluid chamber 15；Therefore pvc pipe 27, snap joint 28, rotation are passed through from hydraulic system 26
The delivery hole 16 of annular intake chute 18 and first on the second delivery hole 29, swivel joint rotor 10 on joint rotor stator 17 arrives
More than 3 fluid passages sealed are formd between fluid chamber 15 in emery wheel chassis 2.
Described hydraulic system 26 is made up of hydraulic pump 31, pressure regulator valve 32, overflow valve 35, adapter 33, magnetic valve 34, liquid
The input of press pump 31 is connected with fuel tank, and the output end of hydraulic pump 31 is connected by one end of adapter 33 with magnetic valve 34, electricity
The other end of magnet valve 34 is connected by pvc pipe 27 with the second delivery hole 29 on swivel joint stator 17, wherein magnetic valve 34
Break-make is controlled by TT＆C system 25；The output end of hydraulic pump 31 is provided with pressure regulator valve 32, overflow valve 35.
More than 3 are evenly equipped with same circumference on described emery wheel chassis 2 and matches somebody with somebody repeated hole 6, with repeated hole 6 is countersunk head screw thread
Hole, the screw for choosing unlike material and different length carry out counterweight, offline dynamic balancing are carried out before emery wheel 1 works.
It is spaced from each other between described fluid chamber 15 by cavity volume next door 30, a discharge opeing is arranged at the bottom of each fluid chamber 15
Hole 14, outage 14 are countersunk head screwed holes.
O-ring seal 19 is distributed with the described both ends of annular intake chute 18.
There is a sealing ring 8 at the both ends of described fluid chamber 15 respectively.
The present invention compared with prior art, has advantages below：
(1) reserved on emery wheel chassis 2 of the invention it is a number of match somebody with somebody repeated hole 6, on-line dynamic balancing terminal can be entered
The offline counterweight of row, eliminate the static unbalance of terminal；
(2) have the fluid chamber 15 being evenly distributed on emery wheel chassis 2 of the invention, main shaft 11 in the course of the work, due to
When the reasons such as abrasion of grinding wheel cause imbalance, hydraulic system 26 can be controlled by TT＆C system 25 into different fluid chambers 15
A certain amount of liquid is injected, so as to balance out the amount of unbalance of main shaft 11, the on-line dynamic balancing of grinding machine spindle is realized, so as to improve
Crudy and processing efficiency；
(3) there is closed passage to connect between swivel joint stator 17 of the invention and the fluid chamber 15 on emery wheel chassis 2, prevent
Liquid splash problem in having stopped toward fluid chamber 15 during hydrojet, reduces the loss of liquid, improves on-line dynamic balancing
Effect, so as to further increase crudy.
Brief description of the drawings
Fig. 1 is the revolved sectional view of the present invention.
Fig. 2 is the emery wheel chassis sectional view of the present invention.
Fig. 3 is the principle schematic of hydraulic system used in the present invention.
Embodiment
Below in conjunction with the accompanying drawings and embodiment is described in further detail to the present invention.
Reference picture 1, Fig. 2, a kind of liquid-spraying type on-line dynamic balancing terminal suitable for big external diameter external thread grinder main shaft, including
Emery wheel chassis 2, the tapered centre hole 13 and the tapering of main shaft 11 on emery wheel chassis 2 are connected, and pass through locking nut 12
Emery wheel chassis 2 is fastened on main shaft 11, makes cooperation solid and reliable；6 countersunk head through holes 5 and emery wheel end cap 3 on emery wheel chassis 2
On 6 through holes 4 between position it is mutually corresponding, emery wheel chassis 2 is connected with emery wheel end cap 3 by bolt, simultaneously clamps on installation
Emery wheel 1 between emery wheel chassis 2 and emery wheel end cap 3；
The central shaft on emery wheel chassis 2 is connected with swivel joint rotor 10 by interference fits, on swivel joint rotor 10
Coordinate between flange connector on boss and emery wheel chassis 2 for gap；Uniform 4 screw threads are blind on the boss of swivel joint rotor 10
Hole 9, tapped blind hole 9 is corresponding with the position of 4 countersunk head through holes 7 on the flange connector on emery wheel chassis 2, can pass through countersunk head spiral shell
Swivel joint rotor 10 is connected on emery wheel chassis 2 by nail 7；
The axis hole of swivel joint rotor 10 and the gap of swivel joint stator 17 coordinate, and fit clearance is desirable tens microns；2
The outer ring of deep groove ball bearing 20 coordinates with the endoporus of swivel joint stator 17 for clearance, and inner ring and the rotation of deep groove ball bearing 20 connect
The external diameter of head rotor 10 is interference fit, and is held out against the deep groove ball bearing 20 of rear end by locking nut 21；Swivel joint is determined
The rear end flange of son 17 has 8 countersunk head through holes 22, mutually right between 8 tapped blind holes 23 on countersunk head through hole 22 and casing 24
Should, swivel joint stator 17 is fixed on casing 24 by screw；In the course of work of main shaft 11, swivel joint rotor 10 with
Emery wheel chassis 2, emery wheel end cap 3 and emery wheel 1 will rotate with main shaft 11, and swivel joint stator 17 is static；
There are 4 the second delivery holes 29 equidistantly distributed, each second delivery hole 29 on described swivel joint stator 17
On be mounted on a snap joint 28, each snap joint 28 is connected by respective pvc pipe 27 with hydraulic system 26；It is described
Swivel joint rotor 10 external diameter on have 4 annular intake chutes 18 equidistantly distributed, annular intake chute 18 is in radial direction
It is upper corresponding with the second delivery hole 29 on swivel joint stator 17, O-ring seal is distributed with the annular both ends of intake chute 18
19, for the annular drain for preventing liquid from being flowed into from the second delivery hole 29 on swivel joint stator 17 in swivel joint rotor 10
Revealed during groove 18；Swivel joint rotor 10 is evenly distributed 4 the first delivery holes 16, the both ends point of the first delivery hole 16
The fluid chamber 15 being evenly distributed not corresponding on the annular intake chute 18 on swivel joint rotor 10 and emery wheel chassis 2 is connected
It is logical, it is spaced from each other between each fluid chamber 15 by cavity volume next door 30, prevents the liquid in each fluid chamber 15 from mutually flowing, in each appearance
One outage 14 is arranged at the bottom of sap cavity 15, and outage 14 is countersunk head screwed hole, when main shaft 11 works by screw-driving, clearly
Screw is backed out when managing liquid, the liquid in fluid chamber 15 is poured out；There is a sealing ring 8 at the both ends of fluid chamber 15 respectively, lead to
The front end of swivel joint rotor 10 and the close contact of the rear end of emery wheel chassis 2 are crossed, ensure that the sealing of fluid chamber 15；Therefore from liquid
Pressure system 26 is turned by the second delivery hole 29 on pvc pipe 27, snap joint 28, swivel joint rotor stator 17, swivel joint
Son 10 on the delivery hole 16 of annular intake chute 18 and first to formd between the fluid chamber 15 in emery wheel chassis 24 sealing
Fluid passage.
Reference picture 3, described hydraulic system 26 is by hydraulic pump 31, pressure regulator valve 32, overflow valve 35, adapter 33, magnetic valve
34 compositions, the input of hydraulic pump 31 connects with fuel tank, the output end of hydraulic pump 31 pass through adapter 33 and magnetic valve 34 one
End connection, the other end of magnetic valve 34 are connected by pvc pipe 27 with the second delivery hole 29 on swivel joint stator 17, wherein electricity
The break-make of magnet valve 34 is controlled by TT＆C system 25；The output end of hydraulic pump 31 is provided with pressure regulator valve 32, overflow valve 35, hydraulic pressure
Pump 31 is responsible for maintaining the pressure in oil circuit, and overflow valve 35 plays off-load protection oil circuit, prevents that oil circuit pressure is excessive and damages hydraulic pressure
System, pressure regulator valve 32 are responsible for according to the outlet pressure for being actually needed regulation fluid path.
18 are evenly equipped with same circumference on described emery wheel chassis 2 and matches somebody with somebody repeated hole 6, is countersunk head screwed hole with repeated hole 6, is selected
Take the screw of unlike material and different length to carry out counterweight, offline dynamic balancing is carried out before emery wheel 1 works.
The present invention operation principle be：When main shaft 11 rotates, emery wheel 1, emery wheel chassis 2, emery wheel end cap 3, swivel joint turn
Son 10 will rotate with main shaft 11, and swivel joint stator 17 remains static, and hydraulic system 26 is by pvc pipe 27 and quickly
The secure attachment of joint 28 is on the second delivery hole 29 of swivel joint stator 17；TT＆C system 25 detects that main shaft 11 is working
During when amount of unbalance be present, TT＆C system 25 will send to hydraulic system 26 and instruct, hydraulic system 26 according to instruction to
Delivery hydraulic pressure oil, hydraulic oil are flowed into by the second delivery hole 29 in static swivel joint stator 10 in corresponding pvc pipe 27
In the annular seal groove 18 of the corresponding swivel joint rotor 10 being rotating, the rotated joint of hydraulic oil in annular seal groove 18
The first delivery hole 16 on rotor 10 is flowed into corresponding fluid chamber 15, and the hydraulic oil flowed into fluid chamber 15 changes spindle shaft
The Mass Distribution of system, so as to counteract amount of unbalance, realize on-line dynamic balancing.
Claims (6)
1. a kind of liquid-spraying type on-line dynamic balancing terminal suitable for big external diameter external thread grinder main shaft, including emery wheel chassis (2), sand
Wheel chassis (2) is connected with main shaft (11), and the connection of emery wheel chassis (2) and emery wheel end cap (3) steps up emery wheel (1), it is characterised in that：Sand
The central shaft for taking turns chassis (2) is connected with swivel joint rotor (10) by interference fits, the axis hole of swivel joint rotor (10) and
Swivel joint stator (17) gap coordinates, and swivel joint stator (17) is fixed on casing (24)；
There are more than 3 the second delivery holes equidistantly distributed (29), each second drain on described swivel joint stator (17)
A snap joint (28) is mounted on hole (29), each snap joint (28) passes through respective pvc pipe (27) and hydraulic pressure system
System (26) is connected；There are more than the 3 annular intake chutes equidistantly distributed (18) on the external diameter of described swivel joint rotor (10),
Annular intake chute (18) is corresponding with the second delivery hole 29 on swivel joint stator (17) in radial directions；Swivel joint turns
Sub (10) are evenly distributed first delivery hole (16) of more than 3, and the both ends of the first delivery hole (16) turn with swivel joint respectively
Annular intake chute (18) on sub (10) is connected with the fluid chamber (15) being accordingly evenly distributed on emery wheel chassis (2), passes through
The front end of swivel joint rotor (10) and the close contact of emery wheel chassis (2) rear end, ensure that the sealing of fluid chamber (15)；Therefore
Pass through the second delivery hole on pvc pipe (27), snap joint (28), swivel joint rotor stator (17) from hydraulic system (26)
(29), the appearance liquid that the annular intake chute (18) on swivel joint rotor (10) and the first delivery hole (16) are arrived in emery wheel chassis (2)
More than 3 fluid passages sealed are formd between chamber (15).
2. a kind of liquid-spraying type on-line dynamic balancing suitable for big external diameter external thread grinder main shaft according to claim 1 is whole
End, it is characterised in that：Described hydraulic system (26) is by hydraulic pump (31), pressure regulator valve (32), overflow valve (35), adapter
(33), magnetic valve (34) forms, and the input of hydraulic pump (31) connects with fuel tank, and the output end of hydraulic pump (31) passes through adapter
(33) one end with magnetic valve (34) connects, and the other end of magnetic valve (34) passes through pvc pipe (27) and swivel joint stator (17)
On the second delivery hole (29) be connected, wherein break-make being controlled by TT＆C system (25) of magnetic valve (34)；Hydraulic pump
(31) output end is provided with pressure regulator valve (32), overflow valve (35).
3. a kind of liquid-spraying type on-line dynamic balancing suitable for big external diameter external thread grinder main shaft according to claim 1 is whole
End, it is characterised in that：More than 3 are evenly equipped with same circumference on described emery wheel chassis (2) and matches somebody with somebody repeated hole (6), with repeated hole
(6) it is countersunk head screwed hole, the screw for choosing unlike material and different length carries out counterweight, is carried out before emery wheel (1) works offline
Dynamic balancing.
4. a kind of liquid-spraying type on-line dynamic balancing suitable for big external diameter external thread grinder main shaft according to claim 1 is whole
End, it is characterised in that：It is spaced from each other between described fluid chamber (15) by cavity volume next door (30), the bottom of each fluid chamber (15)
There is an outage (14), outage (14) is countersunk head screwed hole.
5. a kind of liquid-spraying type on-line dynamic balancing suitable for big external diameter external thread grinder main shaft according to claim 1 is whole
End, it is characterised in that：O-ring seal (19) is distributed with described annular intake chute (18) both ends.
6. a kind of liquid-spraying type on-line dynamic balancing suitable for big external diameter external thread grinder main shaft according to claim 1 is whole
End, it is characterised in that：There is a sealing ring (8) at the both ends of described fluid chamber (15) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710510339.XA CN107363720B (en) | 2017-06-28 | 2017-06-28 | Liquid-spraying type on-line dynamic balancing terminal suitable for big outer diameter external thread grinder main shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710510339.XA CN107363720B (en) | 2017-06-28 | 2017-06-28 | Liquid-spraying type on-line dynamic balancing terminal suitable for big outer diameter external thread grinder main shaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107363720A true CN107363720A (en) | 2017-11-21 |
| CN107363720B CN107363720B (en) | 2019-02-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710510339.XA Active CN107363720B (en) | 2017-06-28 | 2017-06-28 | Liquid-spraying type on-line dynamic balancing terminal suitable for big outer diameter external thread grinder main shaft |
Country Status (1)
| Country | Link |
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| CN (1) | CN107363720B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019136957A1 (en) * | 2018-01-09 | 2019-07-18 | 西安交通大学 | Integrated online dynamic balance terminal employing 3d modeling technique |
| CN110823454A (en) * | 2019-11-21 | 2020-02-21 | 沈阳建筑大学 | Mass compensation optimization method for high-speed spindle mechanical dynamic balance device |
| CN112117875A (en) * | 2020-10-19 | 2020-12-22 | 长春工业大学 | Novel liquid type rotor dynamic balance head structure |
| CN113595280A (en) * | 2021-08-18 | 2021-11-02 | 华能通辽风力发电有限公司 | Rotor |
| CN114576310A (en) * | 2022-02-24 | 2022-06-03 | 北京化工大学 | Large-diameter hydraulic automatic balancing actuator |
| CN114635177A (en) * | 2022-03-07 | 2022-06-17 | 南京航空航天大学 | Nozzle and method for assisting electrolytic polishing of abrasive particles on inner surface of metal flow channel |
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| CN102169041A (en) * | 2011-01-18 | 2011-08-31 | 西安交通大学 | Online holobalancing system for pourable hydraulic rotor |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019136957A1 (en) * | 2018-01-09 | 2019-07-18 | 西安交通大学 | Integrated online dynamic balance terminal employing 3d modeling technique |
| US11092944B2 (en) | 2018-01-09 | 2021-08-17 | Xi'an Jiaotong University | Integrated 3D-prototyped online dynamic balance terminal |
| CN110823454A (en) * | 2019-11-21 | 2020-02-21 | 沈阳建筑大学 | Mass compensation optimization method for high-speed spindle mechanical dynamic balance device |
| CN112117875A (en) * | 2020-10-19 | 2020-12-22 | 长春工业大学 | Novel liquid type rotor dynamic balance head structure |
| CN113595280A (en) * | 2021-08-18 | 2021-11-02 | 华能通辽风力发电有限公司 | Rotor |
| CN113595280B (en) * | 2021-08-18 | 2023-11-17 | 华能通辽风力发电有限公司 | Rotor |
| CN114576310A (en) * | 2022-02-24 | 2022-06-03 | 北京化工大学 | Large-diameter hydraulic automatic balancing actuator |
| CN114576310B (en) * | 2022-02-24 | 2022-10-04 | 北京化工大学 | Large-diameter hydraulic automatic balancing actuator |
| CN114635177A (en) * | 2022-03-07 | 2022-06-17 | 南京航空航天大学 | Nozzle and method for assisting electrolytic polishing of abrasive particles on inner surface of metal flow channel |
| CN114635177B (en) * | 2022-03-07 | 2023-09-29 | 南京航空航天大学 | Nozzle and method for assisting electrolytic polishing by abrasive particles on inner surface of metal runner |
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| Publication number | Publication date |
|---|---|
| CN107363720B (en) | 2019-02-26 |
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