CN201885872U - Weight arm assembling and disassembling device for wind power variable-pitch bearing test - Google Patents
Weight arm assembling and disassembling device for wind power variable-pitch bearing test Download PDFInfo
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- CN201885872U CN201885872U CN2010202548323U CN201020254832U CN201885872U CN 201885872 U CN201885872 U CN 201885872U CN 2010202548323 U CN2010202548323 U CN 2010202548323U CN 201020254832 U CN201020254832 U CN 201020254832U CN 201885872 U CN201885872 U CN 201885872U
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Abstract
The utility model relates to a weight arm assembling and disassembling device for a wind power variable-pitch bearing test, comprising a weight arm assembling and disassembling device and a hydraulic control system, wherein a traveling wheel I and a traveling wheel II are installed on a fixed rail; a shaft of the traveling wheel I is provided with a driving arm; a shaft of the traveling wheel II is provided with a swinging arm and forms a parallelogram mechanism by a pull rod and a base; a lifting hydraulic cylinder is arranged between the base and the driving arm; an advancing and retreating hydraulic cylinder is arranged on a fixed support on the basis by a lug shaft, and the head part of the advancing and retreating hydraulic cylinder is connected with the base; the hydraulic control system consists of an oil tank component, an oil supplying system, an advancing and retreating oil tank hydraulic system and a lifting oil tank hydraulic system; the advancing and retreating oil tank hydraulic system controls advancing and retreating of a weight arm and realizes floating of the assembling and disassembling device; and the lifting oil tank hydraulic system controls lifting, falling and pressure maintaining of the weight arm assembling and disassembling device, so that the synchronization action of two hydraulic cylinders is guaranteed, and secondary switching of low pressure in the lifting process and the system pressure is realized. The weight arm assembling and disassembling device has the advantages that the assembling and disassembling process of the weight arm is efficient, safe and automatic.
Description
Technical field
The utility model relates to a kind of wind electricity pitch variable bearings test and uses the weight arm handler, belongs to plant equipment and technical field of hydraulic.
Background technology
In the performance test of wind generating variable-propeller swing bearing, adopt weight arm simulation blade at present, the wind of counterweight dummy activity on blade carries, and becomes the performance test of oar swing bearing by weight arm and being connected of wheel hub.Wheel hub fixedly puts together on the base of mill floor, and weight arm is placed on two fixed saddles of wheel hub front, and the quantity of weight arm has two or three not wait according to the structure of impeller.Assembling between weight arm and the wheel hub and dismounting are to rely on crane to realize that its shortcoming is can only assemble or dismantle a weight arm at every turn, need many people to participate in assembling, low, the poor stability of production efficiency and automatization level.Therefore the change oar weight arm handler of developing a kind of efficient, safe robotization is a problem demanding prompt solution.
A kind of wind electricity pitch variable bearings test weight arm handler of the present invention adopts hydraulic system drive controlling parallel four-bar linkage, and its advance and retreat operation valve group can realize advance and retreat the position maintenance of cylinder and the control of floating; Lift controil valve group, syncmotor, lifting cylinder valve group can realize that the position of lift cylinders keeps, the secondary pressure of lift cylinders switches and synchronization lifting control, have automaticity height, advantage that security is good.
Each efficiency of loading and unloading that becomes the oar weight arm reduced to 5 minutes by original 1 hour, had improved test run efficient and production security greatly, had satisfied the requirement of wind-powered electricity generation mass production.
Summary of the invention
The purpose of this invention is to provide a kind of wind electricity pitch variable bearings test weight arm handler efficient, safe, robotization.
Technical solution of the present utility model is achieved in that
A kind of wind electricity pitch variable bearings test weight arm handler, comprise weight arm handler and hydraulic control system, the weight arm handler is by the travelling wheel I of base and two cover symmetric arrangement, actuating arm, lifting hydraulic cylinder, pull bar, travelling wheel II, swing arm, compositions such as advance and retreat hydraulic cylinder, it is characterized in that described travelling wheel I, travelling wheel II is installed on the trapped orbit, an actuating arm is housed on the travelling wheel I axle, a swing arm is housed on the travelling wheel II axle, actuating arm, between swing arm and the axletree by roller bearings, actuating arm, one end of swing arm links to each other with base, the other end links to each other with pull bar, actuating arm, pull bar, swing arm is formed parallel-crank mechanism, between base and the actuating arm lifting hydraulic cylinder is housed, the advance and retreat hydraulic cylinder is installed on the hold-down support on the basis by gudgeon, and hydraulic cylinder head and base link; Hydraulic control system is by fuel tank assembly, oil supply system, advance and retreat oil cylinder hydraulic system, the hoist cylinder hydraulic system is formed, it is characterized in that described fuel tank assembly provides oil for oil supply system and the oil return of accept to advance and retreat oil cylinder hydraulic system and hoist cylinder hydraulic system, oil supply system provides pressure oil and forms system's pressurize for advance and retreat oil cylinder hydraulic system and hoist cylinder hydraulic system, relief circuit, advance and retreat oil cylinder hydraulic system controls the advance and retreat of weight arm and controls floating of advance and retreat hydraulic cylinder with two-position four-way solenoid directional control valve I acting in conjunction, the liter of hoist cylinder HYDRAULIC CONTROL SYSTEM weight arm handler, fall and pressurize, guarantee the synchronization action of two lifting hydraulic cylinders, realize that the secondary of lifting process mesolow and system pressure switches.
Described advance and retreat oil cylinder hydraulic system is made up of reduction valve, 3-position 4-way solenoid directional control valve I two-position four-way solenoid directional control valve I, superposing type Double throttle check valve I and two-way hydraulic control one-way valve I, surplus valve, advance and retreat hydraulic cylinder, the advance and retreat pressure of reduction valve control advance and retreat cylinder; 3-position 4-way solenoid directional control valve I controls advancing, retreating of advance and retreat hydraulic cylinder and controls floating of advance and retreat hydraulic cylinder with two-position four-way solenoid directional control valve I acting in conjunction; One-way throttle valve I adjusts the speed of oil cylinder advance and retreat; Hydraulic control one-way valve I keeps the position of advance and retreat cylinder; Surplus valve plays safety effect; The opening and closing of two-position four-way solenoid directional control valve I control hydraulic control one-way valve I, I is charged for the two-position four-way solenoid directional control valve, control hydraulic control one-way valve I opens, hydraulic control one-way valve I closes during outage, 3-position 4-way solenoid directional control valve I outage this moment, the direct fuel tank assembly of its oil return opening is avoided the pressurize influence of return oil pressure to hydraulic control one-way valve I.
Described hoist cylinder hydraulic system is made up of hydraulic control one-way valve II and lifting hydraulic cylinder, one-way throttle valve III, two-position four-way solenoid directional control valve II, the two-position four-way solenoid directional control valve III that pressure switches reduction valve, retaining valve, 3-position 4-way solenoid directional control valve II, hydraulic control one-way valve III, superposing type Double throttle check valve II, pressure switch, syncmotor, symmetric arrangement, the ascending, descending and the pressurize of 3-position 4-way solenoid directional control valve II control lifting hydraulic cylinder; Pressure switches reduction valve control lifting pressure, two-position four-way solenoid directional control valve III outage during the lifting of idling lotus, the draining that pressure switches reduction valve is communicated to drain line through two-position four-way solenoid directional control valve III, when handler touches weight arm, pressure rises when reaching the pressure switch setting value, III is charged for the two-position four-way solenoid directional control valve, pressure oil affacts the draining chamber that pressure switches reduction valve through two-position four-way solenoid directional control valve III, the top hole pressure of reduction valve becomes system pressure, realizes that the secondary pressure that becomes the lifting of oar weight arm handler switches; One-way throttle valve II can adjust the speed of oil cylinder lifting; Hydraulic control one-way valve II, fluid-control one-way III keep the position of lifting hydraulic cylinder, and two-position four-way solenoid directional control valve II 28 is used to control the opening and closing of hydraulic control one-way valve II 26, one-way throttle valve III 27) opening speed of control hydraulic control one-way valve II 26; Syncmotor 25 keeps the synchro control of two lifting hydraulic cylinders; Every chamber distributor chamber of retaining valve 20 assurance diffluence motors can both be kept the minimum pressure of an about 4bar.
The utlity model has following advantage:
1, efficient, the safety of weight arm cargo handling process;
2, can realize advance and retreat the position maintenance of cylinder and the control of floating, the bolt between assurance weight arm and wheel hub is resultant moment;
3, can realize position maintenance, secondary pressure switching and the synchronization lifting control of lift cylinders;
4, feasible system pressure compensates and unloading function automatically;
Description of drawings
Fig. 1 is the schematic diagram of mechanism of weight arm handler;
Fig. 2 is the hydraulic system principle figure of weight arm handler;
Fig. 3 is the advance and retreat oil cylinder hydraulic systematic schematic diagram of weight arm handler;
Fig. 4 is the hoist cylinder hydraulic system principle figure of weight arm handler;
Fig. 5 is the action flow chart that weight arm is installed;
Fig. 6 is the motion flow of weight arm dismounting;
Fig. 7 is the hydraulic system electromagnet action schedule of weight arm handler.
Among the figure: 1, base, 2, travelling wheel I, 3, actuating arm, 4, lifting hydraulic cylinder, 5, pull bar, 6, travelling wheel II, 7, swing arm, the hydraulic cylinder of 8. advancing and retreat, 9, fuel tank assembly, 10, oil supply system, 11, advance and retreat oil cylinder hydraulic system, 12, the hoist cylinder hydraulic system, 13, reduction valve, 14,3-position 4-way solenoid directional control valve I, 15 one-way throttle valve I, 16, hydraulic control one-way valve I, 17, surplus valve, 18, two-position four-way solenoid directional control valve I, 19, pressure switches reduction valve, 20, retaining valve, 21,3-position 4-way solenoid directional control valve II, 22, hydraulic control one-way valve III, 23, one-way throttle valve II, 24, pressure switch, 25, syncmotor, 26, hydraulic control one-way valve II, 27, one-way throttle valve III, 28, bi-bit bi-pass solenoid directional control valve II, 29, bi-bit bi-pass solenoid directional control valve III.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described.
As shown in drawings, wind electricity pitch variable bearings test weight arm handler, comprise weight arm handler and hydraulic control system, the weight arm handler is by the travelling wheel I 2 of base 1 and two cover symmetric arrangement, actuating arm 3, lifting hydraulic cylinder 4, pull bar 5, travelling wheel II 6, swing arm 7, advance and retreat hydraulic cylinder 8 compositions such as grade, travelling wheel I 2, travelling wheel II 6 is installed on the trapped orbit, on 2 of the travelling wheel I actuating arm 3 is housed, on 6 of the travelling wheel II swing arm 6 is housed, actuating arm 3, between swing arm 7 and the axletree by roller bearings, actuating arm 3, one end of swing arm 7 links to each other with base 1, the other end links to each other with pull bar 5, actuating arm 3, pull bar 5, swing arm 7 is formed parallel-crank mechanism, can guarantee at the weight arm liter, fall and remain parallel moving in the process.Between base 1 and the actuating arm 3 lifting hydraulic cylinder 4 is housed, this hydraulic cylinder is used to realize the elevating movement of base.Advance and retreat hydraulic cylinder 8 is installed on the hold-down support on the basis by gudgeon, and hydraulic cylinder head and base 1 link and can realize moving horizontally of base when advance and retreat hydraulic cylinder 8 moves, thus the advance and retreat of drive weight arm.By the total front and back of elevating mechanism two covers that travelling wheel I 2, actuating arm 3, lifting hydraulic cylinder 4, pull bar 5, travelling wheel II 6, swing arm 7 are formed, symmetric arrangement.Under the acting in conjunction of two lifting hydraulic cylinders 4, finish the lifting work that becomes the oar weight arm.
Hydraulic control system is by fuel tank assembly 9, oil supply system 10, advance and retreat oil cylinder hydraulic system 11, hoist cylinder hydraulic system 12 is formed, fuel tank assembly 9 provides oil for oil supply system 10 and accepts the oil return of advance and retreat oil cylinder hydraulic system 11 and hoist cylinder hydraulic system 12, oil supply system 10 provides pressure oil and forms system's pressurize for advance and retreat oil cylinder hydraulic system 11 and hoist cylinder hydraulic system 12, relief circuit, the advance and retreat of advance and retreat oil cylinder hydraulic system 11 control weight arms and the float function of realization handler, the liter of hoist cylinder hydraulic system 12 control weight arm handlers, fall and pressurize, guarantee the synchronization action of two lifting hydraulic cylinders 4, realize that the secondary of lifting process mesolow and system pressure switches.
Advance and retreat oil cylinder hydraulic system 11 is made up of reduction valve 13,3-position 4-way solenoid directional control valve I 14 two-position four-way solenoid directional control valve I 18, superposing type Double throttle check valve I 15 and two-way hydraulic control one-way valve I 16, surplus valve 17, advance and retreat hydraulic cylinder 8, the advance and retreat pressure of reduction valve 13 control advance and retreat cylinders; 3-position 4-way solenoid directional control valve I14 controls advancing, retreating of advance and retreat hydraulic cylinder 8 and controls floating of advance and retreat hydraulic cylinder 8 with two-position four-way solenoid directional control valve I 18 actings in conjunction; One-way throttle valve I 15 adjusts the speed of oil cylinder advance and retreat; The position that hydraulic control one-way valve I 16 keeps the advance and retreat cylinder; 17 safety effects of surplus valve; The opening and closing of two-position four-way solenoid directional control valve I 18 control hydraulic control one-way valve I 16, I 18 is charged for the two-position four-way solenoid directional control valve, control hydraulic control one-way valve I16 opens, hydraulic control one-way valve I 16 closes during outage, 3-position 4-way solenoid directional control valve I 14 outages this moment, the direct fuel tank assembly 9 of its oil return opening is avoided the pressurize influence of return oil pressure to hydraulic control one-way valve I 16.When 3-position 4-way solenoid directional control valve I 14 outages, the unlatching of two-position four-way solenoid directional control valve I 18 charged control hydraulic control one-way valve I16, two chambeies of advance and retreat oil cylinder 8 are communicated with oil return by the meta function of 3-position 4-way solenoid directional control valve I 14, realize the float function of advance and retreat oil cylinder.The weight arm handler is in quick condition, and the bolt that can carry out weight arm and wheel hub this moment is closing.
Hoist cylinder hydraulic system 12 is switched reduction valve 19 by pressure, retaining valve 20,3-position 4-way solenoid directional control valve II 21, hydraulic control one-way valve III22, superposing type Double throttle check valve II 23, pressure switch 24, syncmotor 25, the hydraulic control one-way valve II26 of symmetric arrangement and lifting hydraulic cylinder 4, one-way throttle valve III27, two-position four-way solenoid directional control valve II 28, two-position four-way solenoid directional control valve III29 forms, the liter of 3-position 4-way solenoid directional control valve II21 control lifting hydraulic cylinder 4, fall and pressurize, pressure switches the lifting pressure of reduction valve 19 control weight arm handlers, two-position four-way solenoid directional control valve III29 is in off-position when the lifting of handler idling lotus, the draining of pressure switching this moment reduction valve 19 is communicated to drain line through two-position four-way solenoid directional control valve III29, realizes the lifting of weight arm handler idling lotus; When handler touches weight arm, pressure rises when reaching pressure switch 24 setting values, III29 is charged for the two-position four-way solenoid directional control valve, this moment, pressure oil affacted the draining chamber that pressure switches reduction valve 19 through two-position four-way solenoid directional control valve III29, the reduction valve main valve plug is opened fully, the top hole pressure of reduction valve becomes system pressure, realized that so just the secondary pressure that becomes the lifting of oar weight arm handler switches, one-way throttle valve II 23 can adjust the speed of oil cylinder lifting, when preventing that oil cylinder from descending, diffluence motor moves and causes another lifting hydraulic cylinder in time not caught up with according to the speed of fast hydraulic cylinder.The position that hydraulic control one-way valve III22, hydraulic control one-way valve II 26 can keep lifting hydraulic cylinder 4, two-position four-way solenoid directional control valve II 28 is used to control the opening and closing of hydraulic control one-way valve II 26, the opening speed of one-way throttle valve III27 may command hydraulic control one-way valve II 26.
Syncmotor 25 is used to keep the synchro control of two lifting hydraulic cylinders, and the effect of surplus valve is to prevent to produce excess pressure in the hydraulic cylinder outlet owing to pressure amplifies phenomenon in the syncmotor.Even therefore have a lifting hydraulic cylinder to fulfil whole stroke ahead of schedule in the loop, the another lifting hydraulic cylinder still can normally be finished its impulse stroke.The effect of retaining valve in the syncmotor and retaining valve 20 is minimum pressures that every chamber distributor chamber of assurance diffluence motor can both be kept an about 4bar.When wherein a hydraulic cylinder had been finished its whole impulse stroke, diffluence motor can guarantee that still slow hydraulic cylinder continues operation.At this moment the minimum pressure of the 4bar of system has just guaranteed that the fastest hydraulic cylinder that pipeline communicates emptying phenomenon can not take place.
Oil supply system 10 is made up of motor, oil pump, unloader and accumulator, stop valve, and can realize system's pressurize, unloading function.When system pressure reached the setting value of unloader, oil pump just was in the low pressure unloading condition; When system pressure be lower than the unloader setting value 10% the time, oil pump can be from the repairing of trend system, the low pressure off-load up to reaching the unloader setting value once more, thereby reduced the heating of system power dissipation and system, reach energy-saving effect.Carry out pressure when stop valve is used to keep in repair and discharge, stop valve is in cut-off state during operate as normal.
Fuel tank assembly 9 is made up of ball valve, electric heater, return filter, level control relay, electric contact thermometer, air cleaner, liquid level gauge etc.
Claims (3)
1. a wind electricity pitch variable bearings is tested and is used the weight arm handler, comprise weight arm handler and hydraulic control system, the weight arm handler is by the travelling wheel I (2) of base (1) and two cover symmetric arrangement, actuating arm (3), lifting hydraulic cylinder (4), pull bar (5), travelling wheel II (6), swing arm (7), advance and retreat hydraulic cylinder compositions such as (8), it is characterized in that described travelling wheel I (2), travelling wheel II (6) is installed on the trapped orbit, on travelling wheel I (2) axle actuating arm (3) is housed, on travelling wheel II (6) axle swing arm (6) is housed, actuating arm (3), between swing arm (7) and the axletree by roller bearings, actuating arm (3), one end of swing arm (7) links to each other with base (1), the other end links to each other with pull bar (5), actuating arm (3), pull bar (5), swing arm (7) is formed parallel-crank mechanism, between base (1) and the actuating arm (3) lifting hydraulic cylinder (4) is housed, advance and retreat hydraulic cylinders (8) are installed on the hold-down support on the basis by gudgeon, and hydraulic cylinder head and base (1) link; Hydraulic control system is by fuel tank assembly (9), oil supply system (10), advance and retreat oil cylinder hydraulic system (11), hoist cylinder hydraulic system (12) is formed, it is characterized in that described fuel tank assembly (9) provides oil for oil supply system (10) and the oil return of accept to advance and retreat oil cylinder hydraulic system (11) and hoist cylinder hydraulic system (12), oil supply system (10) provides pressure oil and forms system's pressurize for advance and retreat oil cylinder hydraulic system (11) and hoist cylinder hydraulic system (12), relief circuit, the advance and retreat of advance and retreat oil cylinder hydraulic systems (11) control weight arm and the float function of realization handler, the liter of hoist cylinder hydraulic system (12) control weight arm handler, fall and pressurize, guarantee the synchronization action of two lifting hydraulic cylinders (4), realize that the secondary of lifting process mesolow and system pressure switches.
2. wind electricity pitch variable bearings test weight arm handler according to claim 1, it is characterized in that described advance and retreat oil cylinder hydraulic system (11) is made up of reduction valve (13), 3-position 4-way solenoid directional control valve I (14) two-position four-way solenoid directional control valve I (18), superposing type Double throttle check valve I (15) and two-way hydraulic control one-way valve I (16), surplus valve (17), advance and retreat hydraulic cylinders (8), the advance and retreat pressure of reduction valve (13) control advance and retreat cylinder; 3-position 4-way solenoid directional control valve I (14) controls advancing, retreating of advance and retreat hydraulic cylinders (8) and controls floating of advance and retreat hydraulic cylinders (8) with two-position four-way solenoid directional control valve I (18) acting in conjunction; One-way throttle valve I (15) adjusts the speed of oil cylinder advance and retreat; Hydraulic control one-way valve I (16) keeps the position of advance and retreat cylinder; Surplus valve (17) plays safety effect; The opening and closing of two-position four-way solenoid directional control valve I (18) control hydraulic control one-way valve I (16), two-position four-way solenoid directional control valve I (18) is charged, control hydraulic control one-way valve I (16) opens, hydraulic control one-way valve I (16) closes during outage, 3-position 4-way solenoid directional control valve I this moment (14) outage, the direct fuel tank assembly of its oil return opening (9) is avoided the pressurize influence of return oil pressure to hydraulic control one-way valve I (16).
3. wind electricity pitch variable bearings test weight arm handler according to claim 1, it is characterized in that described hoist cylinder hydraulic system (12) is by pressure switching reduction valve (19), retaining valve (20), 3-position 4-way solenoid directional control valve II (21), hydraulic control one-way valve III (22), superposing type Double throttle check valve II (23), pressure switch (24), syncmotor (25), the hydraulic control one-way valve II (26) of symmetric arrangement and lifting hydraulic cylinder (4), one-way throttle valve III (27), two-position four-way solenoid directional control valve II (28), two-position four-way solenoid directional control valve III (29) forms, the liter of 3-position 4-way solenoid directional control valve II (21) control lifting hydraulic cylinder (4), fall and pressurize; Pressure switches reduction valve (19) control lifting pressure, two-position four-way solenoid directional control valve III (29) the outage during lifting of idling lotus, the draining that pressure switches reduction valve (19) is communicated to drain line through two-position four-way solenoid directional control valve III (29), when handler touches weight arm, pressure rises when reaching pressure switch (24) setting value, two-position four-way solenoid directional control valve III (29) is charged, pressure oil affacts the draining chamber that pressure switches reduction valve (19) through two-position four-way solenoid directional control valve III (29), the top hole pressure of reduction valve becomes system pressure, realizes that the secondary pressure that becomes the lifting of oar weight arm handler switches; One-way throttle valve II (23) can adjust the speed of oil cylinder lifting; Hydraulic control one-way valve (22,26) keeps the position of lifting hydraulic cylinder (4), and two-position four-way solenoid directional control valve II (28) is used to control the opening and closing of hydraulic control one-way valve II (26), the opening speed of one-way throttle valve III (27) control hydraulic control one-way valve II (26); Syncmotor (25) keeps the synchro control of two lifting hydraulic cylinders; Every chamber distributor chamber of retaining valve (20) assurance diffluence motor can both be kept the minimum pressure of an about 4bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202548323U CN201885872U (en) | 2010-07-08 | 2010-07-08 | Weight arm assembling and disassembling device for wind power variable-pitch bearing test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202548323U CN201885872U (en) | 2010-07-08 | 2010-07-08 | Weight arm assembling and disassembling device for wind power variable-pitch bearing test |
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| Publication Number | Publication Date |
|---|---|
| CN201885872U true CN201885872U (en) | 2011-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202548323U Expired - Fee Related CN201885872U (en) | 2010-07-08 | 2010-07-08 | Weight arm assembling and disassembling device for wind power variable-pitch bearing test |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102313647A (en) * | 2010-07-08 | 2012-01-11 | 大连华锐股份有限公司 | Assembly and disassembly device and method of weight balancing arm for testing wind power pitch bearing |
| CN109441724A (en) * | 2018-12-26 | 2019-03-08 | 北京金风科创风电设备有限公司 | Safety throttling device and method for hydraulic pitch control system and hydraulic pitch control system |
| CN111677707A (en) * | 2020-05-09 | 2020-09-18 | 中国船舶重工集团公司第七一六研究所 | Hydraulic control system suitable for automatic butt joint of loading and unloading arm for ship |
-
2010
- 2010-07-08 CN CN2010202548323U patent/CN201885872U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102313647A (en) * | 2010-07-08 | 2012-01-11 | 大连华锐股份有限公司 | Assembly and disassembly device and method of weight balancing arm for testing wind power pitch bearing |
| CN102313647B (en) * | 2010-07-08 | 2013-11-06 | 大连华锐重工集团股份有限公司 | Assembly and disassembly device of weight balancing arm for testing wind power pitch bearing |
| CN109441724A (en) * | 2018-12-26 | 2019-03-08 | 北京金风科创风电设备有限公司 | Safety throttling device and method for hydraulic pitch control system and hydraulic pitch control system |
| CN111677707A (en) * | 2020-05-09 | 2020-09-18 | 中国船舶重工集团公司第七一六研究所 | Hydraulic control system suitable for automatic butt joint of loading and unloading arm for ship |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: DALIAN HUARUI HEAVY INDUSTRY GROUP CO., LTD. Free format text: FORMER OWNER: HUARUI CO., LTD., DALIAN Effective date: 20120405 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20120405 Address after: 116013 Bayi Road, Xigang District, Liaoning, China, No. 169, No. Patentee after: Dalian Huarui Heavy Industry Group Co., Ltd. Address before: 116013 Bayi Road, Xigang District, Liaoning, China, No. 169, No. Patentee before: Huarui Co., Ltd., Dalian |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110629 Termination date: 20130708 |