CN105429574A - Self-adjusting photovoltaic module bracket and adjusting method thereof - Google Patents

Self-adjusting photovoltaic module bracket and adjusting method thereof Download PDF

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Publication number
CN105429574A
CN105429574A CN201510977897.8A CN201510977897A CN105429574A CN 105429574 A CN105429574 A CN 105429574A CN 201510977897 A CN201510977897 A CN 201510977897A CN 105429574 A CN105429574 A CN 105429574A
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CN
China
Prior art keywords
bracket
self
photovoltaic module
water tank
extending bracket
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Granted
Application number
CN201510977897.8A
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Chinese (zh)
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CN105429574B (en
Inventor
潘广
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Guangdong Yiteng New Energy Co Ltd
PowerChina Zhongnan Engineering Corp Ltd
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Guangdong Yiteng New Energy Co Ltd
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02SGENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S20/00Supporting structures for PV modules
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05DSYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D3/00Control of position or direction
    • G05D3/10Control of position or direction without using feedback
    • G05D3/105Solar tracker
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy

Abstract

The invention provides a self-adjusting photovoltaic module bracket and an adjusting method thereof. The self-adjusting photovoltaic module bracket comprises a bracket upright post, a bracket girder, a counterweight structure, a power water tank and a flow control valve, wherein the bracket girder is connected with the bracket upright post and can rotate in the axial direction; the bracket girder is provided with an extension bracket which extends outwards; the counterweight structure is arranged on the extension bracket, so that the gravity center of the extension bracket does not coincide with that of the bracket girder; the power water tank is arranged at one side of the extension bracket through a hanging rod; a drainage pipeline is arranged at one end of the power water tank; the flow control valve is arranged on the drainage pipeline, and controls the power water tank to quantitatively drain away water; the weight of the drainage pipeline linearly changes along with time; and the extension bracket rotates to a corresponding inclination angle at which the torque balance of the extension bracket can be achieved along with the weight change of the power water tank. The control mode is discharged water flow control; the control difficulty is relatively low; and relatively high tracking accuracy can be achieved.

Description

A kind of self-regulation photovoltaic module support and control method thereof
Technical field
The present invention relates to solar photovoltaic assembly technical field, particularly relate to a kind of self-regulation photovoltaic module support and control method thereof.
Background technology
Existing solar photovoltaic assembly support, generally includes common fixed support and can adjust the adjustment support of photovoltaic module angle.General, in order to effectively improve the generating efficiency of photovoltaic module, adapt to the angle change of sunlight, application regulates the solar tracking device of support (keeping the vertical angle between photovoltaic module and sunlight) to start to be widely used.
And the mode that the power drive scheme of existing solar tracking device support mainly adopts motor driven support to rotate.Described motor drives and generally includes two kinds of drive forms: the first drives electric pushrod by motor, realizes high thrust, thus the rotation of driving arm rotating shaft.The second drives rotary reducer by motor, or turbine and worm deceleration device, realizes larger output torque, thus drives holder pivots by large output torque.
Owing to there is the problem of the stability of electrical machinery life and machine driven system in above-mentioned motor drive mode, it in fact cannot meet the photovoltaic plant design service life of 25 years.Motor, mechanical driving part also need examine and replace often, for user, maintenance and operation cost also higher.
Therefore, prior art need development.
Summary of the invention
In view of above-mentioned the deficiencies in the prior art part, the object of the present invention is to provide a kind of self-regulation photovoltaic module support and control method thereof, be intended to solve prior art solar tracking device operation stability not enough, the problem that maintenance cost is higher.
In order to achieve the above object, this invention takes following technical scheme:
A kind of self-regulation photovoltaic module support, comprise bracket upright post and be connected with bracket upright post, the support girder that can rotate along self axial direction, described support girder is provided with outward extending extending bracket, wherein, described self-regulation photovoltaic module support also comprises:
One counter weight construction, described counter weight construction is arranged on described extending bracket, and the center of gravity of described extending bracket is not overlapped with described support girder;
One power water tank, described power water tank is arranged on the side of described extending bracket by a peg, one end of described power water tank is provided with drainage pipeline;
Be arranged on described drainage pipeline, control the quantitative draining of described power water tank, the flow control valve that weight changes linearly over time;
With the weight change of described power water tank, described extending bracket turns to the angle of inclination that should be able to realize extending bracket equalising torque mutually.
Described self-regulation photovoltaic module support, wherein, described counter weight construction comprises:
Be arranged on the first balancing weight bottom described support girder, described first balancing weight is just connect by counterweight support bar and described support girder;
Be arranged on the second balancing weight of described extending bracket opposite side, described second balancing weight passes through counterweight Bracket setting on described extending bracket.
Described self-regulation photovoltaic module support, wherein, described self-regulation photovoltaic module support also comprises:
One storage tank, described storage tank is connected with described power water tank by a connecting tube, stores the water flowed out in power water tank;
One circulating water pump, described circulating water pump is arranged in described connecting tube, is back in power water tank by the water pump in storage tank.
Described self-regulation photovoltaic module support, wherein, described flow control valve comprises: the electromagnetically operated valve controlling power tank drains and the flowmeter be arranged in described drainage pipeline.
Described self-regulation photovoltaic module support, wherein, described bracket upright post, support girder and peg are truss structure.
Described self-regulation photovoltaic module support, wherein, is provided with buffer between described bracket upright post and extending bracket;
Described buffer provides damping to exceed preassigned to stop the angular momentum of described extending bracket.
Described self-regulation photovoltaic module support, wherein, is connected by rolling bearing between described bracket upright post with support girder;
The bearing pedestal of described rolling bearing is fixedly installed in described bracket upright post;
Described rolling bearing is also provided with the rolling bearing protective sleeve hiding described rolling bearing outward.
Apply a support angle control method for self-regulation photovoltaic module support as above, wherein, described method comprises:
A, calculate the situation of change of local sun altitude;
B, according to described sun altitude, calculate corresponding extending bracket angle of inclination;
C, principle of moment balance based on described extending bracket, discharge the water of corresponding weight by flow control valve gate control power water tank, make described extending bracket rotate to described extending bracket angle of inclination.
Described support angle control method, wherein, described method also comprises: when night, described power water tank is filled water, makes described extending bracket be positioned at tilting towards east the position of 45 °.
Beneficial effect: a kind of self-regulation photovoltaic module support provided by the invention and control method thereof, by arranging the variable power water tank of weight, driving photovoltaic module support to change angle of inclination based on principle of moment balance, realizing the task of solar tracking.The delivery flow being water due to above-mentioned control mode controls, and controls difficulty lower, can reach higher tracking accuracy.
And the above-mentioned type of drive utilizing equalising torque, without the need to using the drive mechanism of motor and complexity, only needing to control flow, thus making overall sun tracing system stable and reliable operation, easy to maintenance and cost is lower.
Accompanying drawing explanation
Fig. 1 is the cross-sectional structure schematic diagram of the self-regulation photovoltaic module support of the specific embodiment of the invention.
Fig. 2 is the bearing arrangement schematic diagram of the self-regulation photovoltaic module support of the specific embodiment of the invention.
Fig. 3 is the structural representation of the first balancing weight of the self-regulation photovoltaic module support of the specific embodiment of the invention.
Fig. 4 is the structural representation of the second balancing weight of the self-regulation photovoltaic module support of the specific embodiment of the invention.
Fig. 5 is the method flow diagram of the instantiation of the control flow of the control system of the self-regulation photovoltaic module support of the specific embodiment of the invention.
Fig. 6 is the structural representation of the buffer of the self-regulation photovoltaic module support of the specific embodiment of the invention.
Fig. 7 is the method flow diagram of the control method of the self-regulation photovoltaic module support of the specific embodiment of the invention.
Embodiment
The invention provides a kind of self-regulation photovoltaic module support and control method thereof.For making object of the present invention, technical scheme and effect clearly, clearly, developing simultaneously referring to accompanying drawing, the present invention is described in more detail for embodiment.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
As shown in Figure 1, be the self-regulation photovoltaic module support of the specific embodiment of the invention.Described self-regulation 1 photovoltaic module support comprises: bracket upright post 100, be connected with bracket upright post, the support girder 200 that can rotate along self axial direction and extending bracket 300.
Concrete, as shown in Figure 2, described bracket upright post 100 facilitates for show with support girder 200(, does not show girder in Fig. 2) between can be connected by rolling bearing 110.Wherein, the bearing pedestal 111 of described rolling bearing is fixedly installed in described bracket upright post 100, and support girder 200 is connected with the inner ring 112 of described bearing 110, rotates around self axial direction.
The vibrational power flow of above-mentioned employing rolling bearing, can reduce the pivoting friction of support girder, ensure that the flexibility that extending bracket rotates.
Described rolling bearing 110 is outer is also provided with the rolling bearing protective sleeve 120 hiding described rolling bearing.Dust foreign matter etc. effectively can be avoided to enter Bearing inner by arranging described bearing protecting jacket 120, playing protection bearing, extend bearing useful life etc.
Described bracket upright post 100 one end is fixed on fixed pan, such as concrete pedestal etc., thus the concrete setting position of fixing photovoltaic bracket.Described bracket upright post specifically can adopt vertical columns or the strutting piece of any suitable shape or structure, such as A type strutting piece etc. as shown in Figure 1.
Described extending bracket 300 is arranged on support girder 200, changes angle of inclination with the rotation of support girder 200.Photovoltaic module 10 can be fixedly installed on described extending bracket 300.
Described self-regulation photovoltaic module support also comprises: counter weight construction (not shown) and power water tank 400.
Described counter weight construction refers to and is arranged on described extending bracket, makes the specific vibrational power flow that the center of gravity of described extending bracket does not overlap with described support girder.
Described counter weight construction specifically can adopt multiple different structure to be achieved, such as, by setting up extra balancing weight on extending bracket, can change the distribution of weight of extending bracket both sides; Or use in the side of extending bracket the material that density is larger, opposite side uses the material that density is lighter, make the weight of extending bracket both sides unequal, or other is suitable, can changes extending bracket both sides weight, make the structure of its centre-of gravity shift.
Should be understood that, in order to ensure that described self-regulation photovoltaic module support can be implemented easily, the distribution of weight of described extending bracket both sides should have enough or larger difference.
Described power water tank 400 is arranged on the side of described extending bracket by a peg.One end of described power water tank 400 is provided with drainage pipeline.
Described drainage pipeline is also provided with the flow control valve for controlling the quantitative draining of described power water tank.By described flow control valve, the weight of power water tank 400 can be controlled with linear change.
Because power water tank 400 and total eccentric moment of extending bracket 300 can realize equalising torque in specific angle.Therefore, with the weight change of described power water tank 400, the angle that extending bracket 300 realizes equalising torque can change thereupon.
According to above-mentioned principle of moment balance, when the weight change of power water tank 400, described extending bracket 300 should be able to realize the angle of inclination of extending bracket 300 equalising torque mutually by turning to.
It is preferred that described bracket upright post, support girder and peg etc. are truss structure, and it has greatly stressed, and span is large, save material, constitutionally stable advantage.
The Computing Principle of equalising torque is stated below for the self-regulation photovoltaic module support of specific embodiment as shown in Figure 1.
In this specific embodiment, as shown in Fig. 1, Fig. 3 and Fig. 4, described counter weight construction specifically comprises:
Be arranged on the first balancing weight 311 bottom described support girder 200.Described first balancing weight 311 is just connect by counterweight support bar 500 and described support girder 200.
Be arranged on the second balancing weight 312 of described extending bracket 300 opposite side.Described second balancing weight is arranged on described extending bracket by counterweight support 510.
Concrete, first and second balancing weight described specifically can adopt any suitable material to make, such as concrete balancing weight, iron balancing weight etc.It is preferred that described support bar 500 and counterweight support 510 can adopt structure as shown in Figures 3 and 4, there is the axle portion that passes the longitudinal extension of balancing weight.Balancing weight is divided into some balancing weight unit, and centre arranges corresponding through hole, is inserted in described axle portion.
Said structure is arranged, and can change the quantity of balancing weight unit easily thus adjust the weight of the first balancing weight 311 or the second balancing weight 312 easily.
Accordingly, the center origin of equalising torque is the center of rotation (or rolling bearing position) of support girder.Make that Mo represents the couple of power water tank, M1 represents that the second balancing weight gravity is even, M2 represents that the first balancing weight gravity is even, M3 represents that the photovoltaic module gravity be arranged on support is even, M4 represents that supporting structure gravity is even.
In the morning to the time period at noon, the equilibrium of couples relation of extending bracket is as follows:
Mo+M3+M4=M1+M2。
At noon to the time period in afternoon, extending bracket needs to climb over 0 degree, towards opposite side.Therefore, new equilibrium of couples relation is as follows:
Mo+M2=M3+M4+M1。
Concrete couple computational methods are well known to those skilled in the art.Therefore, below in the morning to noon section, briefly state.
As shown in Figure 1, if power water tank 400 quality is m1, the first balancing weight 312 quality is m3, second balancing weight 311 quality is m2, the distance to be θ, L be at the angle of inclination of extending bracket center between power water tank 400 and the second balancing weight, h is the distance of the first balancing weight and described support girder.
For meeting equilibrium of couples, should have:
(m1-m2)*L*COSθ=m3*h*sinθ
According to above-mentioned equation, under the prerequisite of first and second balancing weight mass conservation, the tilt angle theta of extending bracket can be changed by the quality m1 changing power water tank 400.
In the preferred embodiment, described self-regulation photovoltaic module support can also comprise: storage tank and circulating water pump.
Described storage tank is connected by a connecting tube and described power water tank (that is drain outlet), stores the water flowed out in power water tank.
Described circulating water pump is then arranged in described connecting tube, for being back in power water tank by the water pump in storage tank.
By the setting of above-mentioned storage tank and circulating water pump, the water in power water tank can closed circulation be utilized, and more environmental protection, can not cause the waste of water resources.Concrete, described circulating water pump and storage tank specifically can use any suitable structure or model, build a recirculated water storage system according to actual conditions.
It is preferred that described flow control valve comprises: the electromagnetically operated valve controlling power tank drains and the flowmeter be arranged in described drainage pipeline.
The mode of above-mentioned use electromagnetically operated valve and flowmeter can realize computer automation and control displacement.The flow information that flowmeter obtains is supplied to control system, and control system calculates current displacement and whether reaches requirement, and Controlling solenoid valve is opened or closed accordingly.
As shown in Figure 5, in this specific embodiment, the instantiation of the control flow of control system.
S1, in the A1 moment, electromagnetically operated valve opens (continue t1 time).
S2, acquisition flowmeter information.
S3, judge whether to reach setting flow, if so, electromagnetically operated valve is closed down (S4); If not, continue to open (S1).
In addition, when reaching the moment of (namely not having the time of sunlight) at dusk, starting water pump, filling power water tank.Moment of described dusk according to situation that is local and current reality pre-determine (the sunset moment namely on geography, usual relevant to local dimension etc., such as afternoon 6 time, when 6,15 grade).
In the preferred embodiment, as shown in Figure 6, buffer 600 is provided with between described bracket upright post 100 and extending bracket 200.When extending bracket 200 is horizontal, the overhang of described buffer is 10mm ± 1.
Described buffer 600, for when the rotary speed of extending bracket is too fast, provides enough dampings to exceed preassigned to stop the angular momentum of described extending bracket.
Principle of moment balance due to self-regulation photovoltaic bracket employing of the present invention realizes the adjustment at angle of inclination, therefore, when having strong crosswind or abrupt wind, the poised state of support will be broken, and extending bracket may hit the damage etc. that bracket upright post causes photovoltaic module support with higher speed.
The generation that above-mentioned buffering 600 effectively can prevent above-mentioned situation is set, provides enough resistances to cause damage to the angular momentum reducing above-mentioned situation downward-extension support to avoid collision mutually.
Described buffer 600 specifically can adopt existing any suitable buffer, and it only provides stronger resistance to avoid the high speed rotating of extending bracket when angular momentum is larger.
More specifically, the major part of described self-regulation photovoltaic module support, the A type bracket upright post, support girder, extending bracket, connecting rod etc. of such as support all adopt hot galvanizing surface process, the rotproofness of effective raising material, for the use under self-regulation photovoltaic module support out of doors adverse circumstances provides good guarantee.
Adopt above-mentioned based on principle of moment balance, control the riding Angle ambiguity mode of discharge, compared with the mode such as conventional electric power driving, its control stability is good, and control realization is easy and to follow the tracks of the precision of the sun better, precision can reach ± 2 ° within.
In the present invention one specific embodiment, described bracket upright post can also be provided with the position limiting structure limiting described extending bracket rotational angle, the pendulum angle of described extending bracket is limited in ± 45 °.
As shown in Figure 7, present invention also offers a kind of support angle control method applying self-regulation photovoltaic module support as above.
Wherein, described method comprises:
S100, calculate the situation of change of local sun altitude.Described sun altitude situation of change can calculate according to astronomical ephemeris etc.
S200, according to described sun altitude, calculate corresponding extending bracket angle of inclination.
S300, principle of moment balance based on described extending bracket, discharge the water of corresponding weight by flow control valve gate control power water tank, make described extending bracket rotate to described extending bracket angle of inclination.
As mentioned above, when using electromagnetically operated valve and flowmeter, the pendulum angle that can realize solar photovoltaic bracket by electric-control system regulates automatically.
More specifically, described method also comprises: when night, described power water tank is filled water, makes described extending bracket be positioned at tilting towards east the position of 45 °.
Above-mentioned control method, by controlling the control that discharge realizes swinging for support, compared with drive and control of electric machine, controlling difficulty lower, can realize point-device Angle ambiguity, thus effectively raise the generating efficiency of photovoltaic module.
Be understandable that, for those of ordinary skills, can be equal to according to technical scheme of the present invention and the present invention's design and replace or change, and all these change or replace the protection range that all should belong to the claim appended by the present invention.

Claims (9)

1. a self-regulation photovoltaic module support, comprise bracket upright post and be connected with bracket upright post, the support girder that can rotate along self axial direction, described support girder is provided with outward extending extending bracket, it is characterized in that, described self-regulation photovoltaic module support also comprises:
One counter weight construction, described counter weight construction is arranged on described extending bracket, and the center of gravity of described extending bracket is not overlapped with described support girder;
One power water tank, described power water tank is arranged on the side of described extending bracket by a peg, one end of described power water tank is provided with drainage pipeline;
Be arranged on described drainage pipeline, control the quantitative draining of described power water tank, the flow control valve that weight changes linearly over time;
With the weight change of described power water tank, described extending bracket turns to the angle of inclination that should be able to realize extending bracket equalising torque mutually.
2. self-regulation photovoltaic module support according to claim 1, is characterized in that, described counter weight construction comprises:
Be arranged on the first balancing weight bottom described support girder, described first balancing weight is just connect by counterweight support bar and described support girder;
Be arranged on the second balancing weight of described extending bracket opposite side, described second balancing weight passes through counterweight Bracket setting on described extending bracket.
3. self-regulation photovoltaic module support according to claim 1, is characterized in that, described self-regulation photovoltaic module support also comprises:
One storage tank, described storage tank is connected with described power water tank by a connecting tube, stores the water flowed out in power water tank;
One circulating water pump, described circulating water pump is arranged in described connecting tube, is back in power water tank by the water pump in storage tank.
4. self-regulation photovoltaic module support according to claim 1, is characterized in that, described flow control valve comprises: the electromagnetically operated valve controlling power tank drains and the flowmeter be arranged in described drainage pipeline.
5. self-regulation photovoltaic module support according to claim 1, is characterized in that, described bracket upright post, and support girder and peg are truss structure.
6. self-regulation photovoltaic module support according to claim 1, is characterized in that, is provided with buffer between described bracket upright post and extending bracket;
Described buffer provides damping to exceed preassigned to stop the angular momentum of described extending bracket.
7. self-regulation photovoltaic module support according to claim 1, is characterized in that, is connected between described bracket upright post with support girder by rolling bearing;
The bearing pedestal of described rolling bearing is fixedly installed in described bracket upright post;
Described rolling bearing is also provided with the rolling bearing protective sleeve hiding described rolling bearing outward.
8. apply a support angle control method for self-regulation photovoltaic module support as claimed in claim 1, it is characterized in that, described method comprises:
A, calculate the situation of change of local sun altitude;
B, according to described sun altitude, calculate corresponding extending bracket angle of inclination;
C, principle of moment balance based on described extending bracket, discharge the water of corresponding weight by flow control valve gate control power water tank, make described extending bracket rotate to described extending bracket angle of inclination.
9. support angle control method according to claim 8, is characterized in that, described method also comprises: when night, described power water tank is filled water, makes described extending bracket be positioned at tilting towards east the position of 45 °.
CN201510977897.8A 2015-12-23 2015-12-23 One kind self-regulation photovoltaic module support and its adjusting method Active CN105429574B (en)

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CN106059471A (en) * 2016-08-24 2016-10-26 中国电建集团中南勘测设计研究院有限公司 Solar photovoltaic fixing support adjustable in angle
CN106106049A (en) * 2016-07-01 2016-11-16 广东亿腾新能源有限公司 A kind of self-regulation photovoltaic irrigation system and tracking irrigation method thereof
CN112701959A (en) * 2020-12-22 2021-04-23 杭州首电能源科技有限公司 Solar energy comprehensive utilization photo-thermal hybrid power generation system
CN113507259A (en) * 2021-07-21 2021-10-15 西北农林科技大学 Sun tracking device for adjusting inclination angle of photovoltaic panel by utilizing water level of water tank
CN115805573A (en) * 2022-12-06 2023-03-17 江苏神铸智能科技有限公司 Aerospace engine maintenance support capable of changing gravity center offset
CN116002791A (en) * 2022-11-15 2023-04-25 水利部节约用水促进中心 Sea water desalination device

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CN106106049A (en) * 2016-07-01 2016-11-16 广东亿腾新能源有限公司 A kind of self-regulation photovoltaic irrigation system and tracking irrigation method thereof
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CN113507259A (en) * 2021-07-21 2021-10-15 西北农林科技大学 Sun tracking device for adjusting inclination angle of photovoltaic panel by utilizing water level of water tank
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CN116002791B (en) * 2022-11-15 2023-09-05 水利部节约用水促进中心 Sea water desalination device
CN115805573A (en) * 2022-12-06 2023-03-17 江苏神铸智能科技有限公司 Aerospace engine maintenance support capable of changing gravity center offset
CN115805573B (en) * 2022-12-06 2023-10-13 江苏神铸智能科技有限公司 Aerospace engine maintenance support capable of changing gravity center offset

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Inventor after: Wen Gaolong

Inventor after: Wang Jin

Inventor after: Chen Gang

Inventor after: Liao Qin

Inventor after: Xiao Zhenxing

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