CN102313647A - Assembly and disassembly device and method of weight balancing arm for testing wind power pitch bearing - Google Patents
Assembly and disassembly device and method of weight balancing arm for testing wind power pitch bearing Download PDFInfo
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- CN102313647A CN102313647A CN2010102234710A CN201010223471A CN102313647A CN 102313647 A CN102313647 A CN 102313647A CN 2010102234710 A CN2010102234710 A CN 2010102234710A CN 201010223471 A CN201010223471 A CN 201010223471A CN 102313647 A CN102313647 A CN 102313647A
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Abstract
The invention discloses an assembly and disassembly device and an assembly and disassembly method of a weight balancing arm for testing a wind power pitch bearing. The device comprises a weight balancing arm assembling and disassembling device and a hydraulic control system, wherein a travelling wheel I and a travelling II are arranged on a fixed rail; a driving arm is arranged on a shaft of the travelling wheel I; a swing arm is arranged on a shaft of the travelling wheel II; a parallelogram mechanism is formed 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 a foundation through 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 supply system, an advancing and retreating oil cylinder hydraulic system and a lifting oil cylinder hydraulic system; the advancing and retreating oil cylinder hydraulic system is used for controlling the weight balancing arm to advance and retreat and making the assembly and disassembly device floated; and the lifting oil cylinder hydraulic system is used for controlling the assembly and disassembly device of the weight balancing arm to ascend and descend and keeping pressure, so that the synchronous action of the two hydraulic cylinders is ensured, and low pressure and system pressure in the lifting process can be switched for two times. The device and the method have the advantages of efficient, safe and automatic weight balancing arm assembling and disassembling processes.
Description
Technical field
Patent of the present invention relates to a kind of wind electricity pitch variable bearings test with weight arm handler and handling method, 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 through 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 of the present invention is adopted hydraulic system drive controlling parallel four-bar linkage with weight arm handler and handling method, 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, up-down 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 efficient, safe, robotization with weight arm handler and handling method.
The technical solution of patent of the present invention is achieved in that
A kind of wind electricity pitch variable bearings test is with weight arm handler and handling method; Comprise weight arm handler and hydraulic control system; The weight arm handler is made up of the travelling wheel I, actuating arm, lifting hydraulic cylinder, pull bar, travelling wheel II, swing arm, advance and retreat hydraulic cylinder etc. of base and two cover symmetric arrangement, it is characterized in that described travelling wheel I, travelling wheel II are installed on the trapped orbit, and an actuating arm is housed on the travelling wheel I axle; A swing arm is housed on the travelling wheel II axle; By roller bearings, an end of actuating arm, swing arm links to each other with base between actuating arm, swing arm and the axletree, and the other end links to each other with pull bar; Actuating arm, pull bar, swing arm are 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 through gudgeon, and hydraulic cylinder head and base link; Hydraulic control system is made up of fuel tank assembly, oil supply system, advance and retreat oil cylinder hydraulic system, hoist cylinder hydraulic system; It is characterized in that described fuel tank assembly is that oil supply system provides oil 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, relief circuit for advance and retreat oil cylinder hydraulic system and hoist cylinder hydraulic system; 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 ascending, descending and the pressurize of hoist cylinder HYDRAULIC CONTROL SYSTEM weight arm handler; 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; The speed of one-way throttle valve I adjustment 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, and 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, and when handler touched weight arm, pressure rose 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, and the top hole pressure of reduction valve becomes system pressure, realizes becoming the secondary pressure switching that oar weight arm handler goes up and down; One-way throttle valve II can adjust the speed that oil cylinder goes up and down; 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 III27) 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.
Patent of the present invention has the following advantages:
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 total 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, 8. advance and retreat hydraulic cylinder, 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 patent of the present invention is further described.
Shown in accompanying drawing; Wind electricity pitch variable bearings test comprises weight arm handler and hydraulic control system with weight arm handler and handling method, and the weight arm handler is overlapped symmetric arrangement by base 1 and two travelling wheel I 2, actuating arm 3, lifting hydraulic cylinder 4, pull bar 5, travelling wheel II 6, swing arm 7, the hydraulic cylinder 8 of advancing and retreat etc. form; Travelling wheel I 2, travelling wheel II 6 are 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, swing arm 7 are asked by roller bearings with axletree; One end of actuating arm 3, swing arm 7 links to each other with base 1; The other end links to each other with pull bar 5, and actuating arm 3, pull bar 5, swing arm 7 are formed parallel-crank mechanism, can guarantee in weight arm ascending, descending process, to remain parallel moving.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 through gudgeon, and hydraulic cylinder head and base 1 link and when 8 actions of advance and retreat hydraulic cylinder, can realize moving horizontally of base, thereby drive the advance and retreat of 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, accomplish the lifting work that becomes the oar weight arm.
Hydraulic control system is made up of fuel tank assembly 9, oil supply system 10, advance and retreat oil cylinder hydraulic system 11, hoist cylinder hydraulic system 12; 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, relief circuit with hoist cylinder hydraulic system 12 for advance and retreat oil cylinder hydraulic system 11; The advance and retreat of advance and retreat oil cylinder hydraulic system 11 control weight arms and the float function of realization handler; The ascending, descending and the pressurize of hoist cylinder hydraulic system 12 control weight arm handlers; 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 advance and retreat pressure of cylinders of reduction valve 13 controls; 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; The speed of one-way throttle valve I 15 adjustment 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, and 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 through 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 made up of hydraulic control one-way valve II 26 and lifting hydraulic cylinder 4, one-way throttle valve III27, two-position four-way solenoid directional control valve II 28, the two-position four-way solenoid directional control valve III29 that pressure switches reduction valve 19, 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, symmetric arrangement; The ascending, descending and the pressurize of 3-position 4-way solenoid directional control valve II21 control lifting hydraulic cylinder 4; 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, and III29 is charged for the two-position four-way solenoid directional control valve, and 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, has so just realized becoming the secondary pressure switching that oar weight arm handler goes up and down, and one-way throttle valve II 23 can adjust the speed that oil cylinder goes up and down; 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 accomplished 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 accomplished 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.
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 test is with weight arm handler and handling method; Comprise weight arm handler and hydraulic control system; The weight arm handler is waited by travelling wheel I (2), actuating arm (3), lifting hydraulic cylinder (4), pull bar (5), travelling wheel II (6), swing arm (7), the advance and retreat hydraulic cylinders (8) of base (1) and two cover symmetric arrangement to be formed, and it is characterized in that described travelling wheel I (2), travelling wheel II (6) are installed on the trapped orbit, an actuating arm (3) is housed on travelling wheel I (2); On travelling wheel II (6) axle swing arm (6) is housed; By roller bearings, an end of actuating arm (3), swing arm (7) links to each other with base (1) between actuating arm (3), swing arm (7) and the axletree, and the other end links to each other with pull bar (5); Actuating arm (3), pull bar (5), swing arm (7) are 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 through gudgeon, and hydraulic cylinder head and base (1) link; Hydraulic control system is made up of fuel tank assembly (9), oil supply system (10), advance and retreat oil cylinder hydraulic system (11), hoist cylinder hydraulic system (12); 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, relief circuit for advance and retreat oil cylinder hydraulic system (11) and hoist cylinder hydraulic system (12); The advance and retreat of advance and retreat oil cylinder hydraulic systems (11) control weight arm and the float function of realization handler; The ascending, descending and the pressurize of hoist cylinder hydraulic system (12) control weight arm handler; 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 according to claim 1 is with weight arm handler and handling method; 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; The speed of one-way throttle valve I (15) adjustment 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, and 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 according to claim 1 is with weight arm handler and handling method; It is characterized in that described hoist cylinder hydraulic system (12) is made up of hydraulic control one-way valve II (26) and lifting hydraulic cylinder (4), one-way throttle valve III (27), two-position four-way solenoid directional control valve II (28), the two-position four-way solenoid directional control valve III (29) that pressure switches 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), symmetric arrangement, 3-position 4-way solenoid directional control valve II (21) controls the ascending, descending and the pressurize of lifting hydraulic cylinder (4); 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), and when handler touched weight arm, pressure rose 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), and the top hole pressure of reduction valve becomes system pressure, realizes becoming the secondary pressure switching that oar weight arm handler goes up and down; One-way throttle valve II (23) can adjust the speed that oil cylinder goes up and down; 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 |
|---|---|---|---|
| CN 201010223471 CN102313647B (en) | 2010-07-08 | 2010-07-08 | Assembly and disassembly device of weight balancing arm for testing wind power pitch bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010223471 CN102313647B (en) | 2010-07-08 | 2010-07-08 | Assembly and disassembly device of weight balancing arm for testing wind power pitch bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102313647A true CN102313647A (en) | 2012-01-11 |
| CN102313647B CN102313647B (en) | 2013-11-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010223471 Expired - Fee Related CN102313647B (en) | 2010-07-08 | 2010-07-08 | Assembly and disassembly device of weight balancing arm for testing wind power pitch bearing |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102729884A (en) * | 2012-07-19 | 2012-10-17 | 三一重工股份有限公司 | Demountable tanker carrier |
| CN103573730A (en) * | 2013-11-07 | 2014-02-12 | 苏州新长光热能科技有限公司 | Heavy-load and high-accuracy melting and holding furnace hydraulic synchronous control system and method |
| CN107939763A (en) * | 2017-12-08 | 2018-04-20 | 江西省保升装卸设备有限公司 | A kind of full-time full-automatic regulation system of hydraulic pressure car unloader |
| CN109404440A (en) * | 2018-11-26 | 2019-03-01 | 合建卡特（芜湖）重工科技有限公司 | A kind of automatic locking apparatus anti-fall for road and bridge machinery |
| CN112628224A (en) * | 2019-09-24 | 2021-04-09 | 山河智能装备股份有限公司 | Quadrilateral linkage mechanism |
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| JPS5750639A (en) * | 1980-09-12 | 1982-03-25 | Nippon Seiko Kk | Tester for life of rolling bearing |
| CN101058395A (en) * | 2006-04-19 | 2007-10-24 | 浙江佳力科技股份有限公司 | Full hydraulic electric forklift hydraulic system |
| CN101172567A (en) * | 2006-11-01 | 2008-05-07 | 中国船舶重工集团公司第七○四研究所 | Parallel-move hoistable platform without self-locking |
| CN101354313A (en) * | 2008-08-27 | 2009-01-28 | 华锐风电科技有限公司 | Method and platform for testing paddle-changing bearing in wind generating set |
| CN201304418Y (en) * | 2008-12-11 | 2009-09-09 | 中冶东方工程技术有限公司 | A reversal stepping cold bed hydraulic synchronization control device |
| CN201885872U (en) * | 2010-07-08 | 2011-06-29 | 大连华锐股份有限公司 | Weight arm assembling and disassembling device for wind power variable-pitch bearing test |
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| JPS5750639A (en) * | 1980-09-12 | 1982-03-25 | Nippon Seiko Kk | Tester for life of rolling bearing |
| CN101058395A (en) * | 2006-04-19 | 2007-10-24 | 浙江佳力科技股份有限公司 | Full hydraulic electric forklift hydraulic system |
| CN101172567A (en) * | 2006-11-01 | 2008-05-07 | 中国船舶重工集团公司第七○四研究所 | Parallel-move hoistable platform without self-locking |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102729884A (en) * | 2012-07-19 | 2012-10-17 | 三一重工股份有限公司 | Demountable tanker carrier |
| CN103573730A (en) * | 2013-11-07 | 2014-02-12 | 苏州新长光热能科技有限公司 | Heavy-load and high-accuracy melting and holding furnace hydraulic synchronous control system and method |
| CN107939763A (en) * | 2017-12-08 | 2018-04-20 | 江西省保升装卸设备有限公司 | A kind of full-time full-automatic regulation system of hydraulic pressure car unloader |
| CN109404440A (en) * | 2018-11-26 | 2019-03-01 | 合建卡特（芜湖）重工科技有限公司 | A kind of automatic locking apparatus anti-fall for road and bridge machinery |
| CN109404440B (en) * | 2018-11-26 | 2024-06-07 | 合建卡特工业股份有限公司 | Automatic locking device for road bridge mechanical anti-slip |
| CN112628224A (en) * | 2019-09-24 | 2021-04-09 | 山河智能装备股份有限公司 | Quadrilateral linkage mechanism |
| CN112628224B (en) * | 2019-09-24 | 2021-11-19 | 山河智能装备股份有限公司 | Quadrilateral linkage mechanism |
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| Publication number | Publication date |
|---|---|
| CN102313647B (en) | 2013-11-06 |
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