CN104944326A - Hydraulic roll ascending system for grinding rolls of vertical mills - Google Patents
Hydraulic roll ascending system for grinding rolls of vertical mills Download PDFInfo
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- CN104944326A CN104944326A CN201410542755.4A CN201410542755A CN104944326A CN 104944326 A CN104944326 A CN 104944326A CN 201410542755 A CN201410542755 A CN 201410542755A CN 104944326 A CN104944326 A CN 104944326A
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- actuating cylinder
- hydraulic actuating
- home roll
- auxiliary roller
- rodless cavity
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C25/00—Control arrangements specially adapted for crushing or disintegrating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
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- General Engineering & Computer Science (AREA)
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- Crushing And Grinding (AREA)
Abstract
The invention provides a hydraulic roll ascending system for grinding rolls of vertical mills. The hydraulic roll ascending system is characterized in that an electromagnetic valve is connected with a first oil pump and a second oil pump to form a double-pump system, pressures can be respectively independently applied by the first oil pump and the second oil pump as needed when the electromagnetic valve is disconnected from the first oil pump and the second oil pump, accordingly, pressures on main roll and auxiliary roll hydraulic loading circuits can be corrected, and the hydraulic roll ascending system is favorable for stabilizing the pressures; the first oil pump and the second oil pump jointly work when the electromagnetic valve is communicated with the first oil pump and the second oil pump, so that the pressure applying speeds can be increased. A rod cavity of a first main roll hydraulic cylinder is connected with a rodless cavity of a first auxiliary roll hydraulic cylinder by an electromagnetic check valve. By the aid of the hydraulic roll ascending system, the problem of vibration of an existing vertical mill in a roll descending pressure applying and material bed establishing procedure, a pressure applying grinding procedure and a roll ascending procedure can be solved, the roll ascending and descending speeds can be increased, the roll ascending time can be shortened, and accordingly the work efficiency can be enhanced. The hydraulic roll ascending system has the advantages of simple and reliable structure and low running and maintaining costs.
Description
Technical field
The invention belongs to slag processing technology field, relate to a kind of Vertical Mill, particularly a kind of grinding roller of vertical mill hydraulic pressure rises roller system.
Background technology
The full name of slag is granulated blast-furnace slag, the waste residue produced when being steel plant's manUfaCtUre of pig iron, and as a kind of ultra-fine slag micropowder it obtained after grinding machine grinding, this slag micropowder can be used as cement and concrete high-quality admixture.At present, the occupation rate in slag vertical-mill market at home reaches more than 95%.
Slag vertical grinding roller has two states: most significant bit (grinding roller rise) and working position (grinding roller pressure).Hydraulic Station realizes rising roller by pressurize to the rodless cavity of main and auxiliary roller oil cylinder (or rod chamber decompression), realizes falling roller and pressure grinding by pressurize to the rod chamber of main and auxiliary roller oil cylinder (or rodless cavity decompression).But Vertical Mill is set up material bed, pressure grinding and rises these three processes of roller and usually can produce large vibration because of the overbalance of power falling roller pressurization.In order to protect the device damage such as reductor, when vibration values reaches system protection value, system can protectiveness be shut down, and is commonly called as vibration stop jumping.
Such as, rising in roller process, main and auxiliary roller will depart from material bed gradually, and the loading force that main and auxiliary roller acts on material bed can reduce, but be difficult to absolute synchronization minimizing each other, and each grinding roller application force destruction that the is uneven and bed of material causes Vertical Mill to vibrate.Home roll mainly plays abrasive action, and loading force is large, should first rise; Auxiliary roller mainly plays stone effect, and loading force is little, should after rise.Both can not put upside down order.In traditional hydraulic efficiency pressure system, the rodless cavity oil circuit of home roll and auxiliary roller oil cylinder is UNICOM, when rising roller, oil pump pressurizes to rodless cavity oil circuit fuel feeding, due to home roll work loading force than auxiliary roller work loading force large and home roll than auxiliary roller weight, so often cause auxiliary roller first to rise, the unfavorable situation risen after home roll, when rising roller, grinding machine usually occurs to vibrate stop jumping.In like manner, in foundation material bed and pressure grinding process, there is auxiliary roller equally and first fall and first pressurize, after home roll, fall the unfavorable situation with rear pressurization, same generation vibration stop jumping.Obviously, vibrate stop jumping can affect production operational availability and cause certain influence to equipment life.
Summary of the invention
The object of the invention is to propose a kind of grinding roller of vertical mill hydraulic pressure and rise roller system, solve Vertical Mill falling roller pressurization foundation material bed, pressure grinding and rising the vibrative problem of grinding machine in roller three processes, and improve dance roller speed and save and rise the roller time, thus lifting work efficiency, have simple and reliable for structure, the advantage that operation expense is low.
In order to solve the problems of the technologies described above, the invention provides a kind of grinding roller of vertical mill hydraulic pressure and rise roller system, comprise fuel tank and annex, first oil pump, second oil pump, first electromagnetic valve, first No leakage solenoid directional control valve, second No leakage solenoid directional control valve, first solenoid directional control valve, second solenoid directional control valve, 3rd No leakage solenoid directional control valve, 4th No leakage solenoid directional control valve, electromagnetism check valve, first auxiliary roller hydraulic actuating cylinder, first home roll hydraulic actuating cylinder, first auxiliary roller hydraulic actuating cylinder has the first auxiliary roller hydraulic actuating cylinder rod chamber, first auxiliary roller hydraulic actuating cylinder rodless cavity, first auxiliary roller hydraulic cylinder piston, first home roll hydraulic actuating cylinder has the first home roll hydraulic actuating cylinder rod chamber, the first home roll hydraulic actuating cylinder rodless cavity, the first home roll hydraulic cylinder piston.
Electromagnetic valve connects the first oil pump and the second oil pump forms double pump system, and when electromagnetic valve disconnects, the first oil pump and the second oil pump can independently pressurize as required, revise the pressure in home roll and auxiliary roller hydraulic loaded loop, is conducive to the stable of pressure; When solenoid valve conduction, the first oil pump and the second oil pump associated working, promote pressing speed.The rodless cavity of the rod chamber of the first home roll hydraulic actuating cylinder with the first auxiliary roller hydraulic actuating cylinder is connected by electromagnetism check valve.
Rising in roller process, first open electromagnetic valve the first oil pump and the second oil pump are combined to make its hydraulic cylinder piston increase to the rodless cavity fuel feeding of the first home roll hydraulic actuating cylinder, first home roll hydraulic cylinder piston is connected with home roll by transmission device, thus lifting home roll rises roller speed, after home roll lifting certain altitude, conducting electromagnetism check valve, at this moment the hydraulic oil part that the rod chamber of the first home roll hydraulic actuating cylinder is discharged flows back to fuel tank, a part enters the rodless cavity of the first auxiliary roller hydraulic actuating cylinder through electromagnetism check valve, as the power that auxiliary roller promotes.When the difference of pressure of the pressure of the rod chamber of the first home roll hydraulic actuating cylinder and the rodless cavity of the first auxiliary roller hydraulic actuating cylinder is less than setting value, close electromagnetism check valve.After waiting for that home roll is raised to most significant bit, solenoid directional control valve disconnects the rodless cavity fuel feeding stopped to the first home roll hydraulic actuating cylinder, and home roll is locked in extreme higher position.Finally observe auxiliary roller, as auxiliary roller arrives extreme higher position, rise roller process and terminate.As auxiliary roller does not arrive extreme higher position, solenoid directional control valve is communicated with the rodless cavity of the first auxiliary roller hydraulic actuating cylinder, and the first oil pump and the second oil pump make auxiliary roller be raised to extreme higher position to its fuel feeding, and after this solenoid directional control valve disconnects the oil supply gallery of the rodless cavity of auxiliary roller hydraulic actuating cylinder.Auxiliary roller is locked in extreme higher position, rises roller process and terminates.
The present invention compared with prior art, its remarkable advantage is, effectively can solve Vertical Mill in the grinding machine vibration problem of falling roller pressurization foundation material bed, pressure grinding and rise in these three processes of roller, have simple and reliable for structure, the advantage that operation expense is low, can roller speed be risen simultaneously, thus promote work efficiency.Achieve rise after home roll first rises auxiliary roller reasonable and rise roller order, the main and auxiliary roller the fastest time departs from the bed of material simultaneously, grinding machine is risen shaking of roller process and stops probability and be reduced to minimum.During main and auxiliary roller pressure grinding, rod chamber, rodless cavity pressure can be corrected simultaneously, realize the most stable of grinding pressure.
Accompanying drawing explanation
Fig. 1 is principle schematic of the present invention.
Fig. 2 is one embodiment of the present of invention structural representations.
Detailed description of the invention
As shown in Figure 1, the invention provides grinding roller of vertical mill hydraulic pressure and rise roller system, comprise: fuel tank and annex 1, first oil pump 2, second oil pump 3, first electromagnetic valve 10, first No leakage solenoid directional control valve 15, second No leakage solenoid directional control valve 16, first solenoid directional control valve 17, second solenoid directional control valve 18, 3rd No leakage solenoid directional control valve 25, 4th No leakage solenoid directional control valve 26, electromagnetism check valve 31, first auxiliary roller hydraulic actuating cylinder 32, first home roll hydraulic actuating cylinder 34, first auxiliary roller hydraulic actuating cylinder 32 has the first auxiliary roller hydraulic actuating cylinder rod chamber 44-2, first auxiliary roller hydraulic actuating cylinder rodless cavity 45-2, first auxiliary roller hydraulic cylinder piston 46-2, first home roll hydraulic actuating cylinder 34 has the first home roll hydraulic actuating cylinder rod chamber 44-1, the first home roll hydraulic actuating cylinder rodless cavity 45-1, the first home roll hydraulic cylinder piston 46-1.
Electromagnetic valve 10 connects the first oil pump 2 and the second oil pump 3 forms double pump system, when electromagnetic valve 10 disconnects, first oil pump 2 and the second oil pump 3 can independently pressurize as required, revise the pressure in home roll and auxiliary roller hydraulic loaded loop, are conducive to the stable of pressure; When electromagnetic valve 10 conducting, the first oil pump 2 and the second oil pump 3 associated working, promotes pressing speed.The rod chamber 44-1 of the first home roll hydraulic actuating cylinder 34 is connected with the rodless cavity 45-2 of the first auxiliary roller hydraulic actuating cylinder 32 by electromagnetism check valve 31.
Rising in roller process, first open electromagnetic valve 10 first oil pump 2 and the second oil pump 3 are combined to make its hydraulic cylinder piston 46-1 increase to the rodless cavity 45-1 fuel feeding of the first home roll hydraulic actuating cylinder 34, first home roll hydraulic cylinder piston 46-1 is connected with home roll by transmission device, thus lifting home roll rises roller speed, after home roll lifting certain altitude, conducting electromagnetism check valve 31, at this moment the hydraulic oil part that the rod chamber 44-1 of the first home roll hydraulic actuating cylinder 34 discharges flows back to fuel tank, a part enters the rodless cavity 45-2 of the first auxiliary roller hydraulic actuating cylinder 32 through electromagnetism check valve 31, as the power that auxiliary roller promotes.When the difference of pressure of the pressure of the rod chamber 44-1 of the first home roll hydraulic actuating cylinder 34 and the rodless cavity 45-2 of the first auxiliary roller hydraulic actuating cylinder 32 is less than setting value, close electromagnetism check valve 31.After waiting for that home roll is raised to most significant bit, solenoid directional control valve 18 disconnects the rodless cavity 45-1 fuel feeding stopped to the first home roll hydraulic actuating cylinder 34, and home roll is locked in extreme higher position.Finally observe auxiliary roller, as auxiliary roller arrives extreme higher position, rise roller process and terminate.As auxiliary roller does not arrive extreme higher position, solenoid directional control valve 17 is communicated with the rodless cavity 45-2 of the first auxiliary roller hydraulic actuating cylinder 32, first oil pump 2 and the second oil pump 3 make auxiliary roller be raised to extreme higher position to its fuel feeding, and after this solenoid directional control valve 17 disconnects the oil supply gallery of the rodless cavity 45-2 of auxiliary roller hydraulic actuating cylinder 32.Auxiliary roller is locked in extreme higher position, rises roller process and terminates.The technical program had both avoided the problem that auxiliary roller first promotes, and took full advantage of again the hydraulic oil that home roll hydraulic actuating cylinder rod chamber is discharged.
As shown in Figure 2, for a specific embodiment of the present invention, comprise: fuel tank and annex 1, first oil pump 2, second oil pump 3, first filter 4, second filter 5, first check valve 6, second check valve 7, first electromagnetic relief valve 8, second electromagnetic relief valve 9, first electromagnetic valve 10, first plug-in type by pass valve 11, second plug-in type by pass valve 12, first throttle valve 13, second throttle 14, first No leakage solenoid directional control valve 15, second No leakage solenoid directional control valve 16, first solenoid directional control valve 17, second solenoid directional control valve 18, 3rd check valve 19, 4th check valve 20, first stacked unidirectional throttle valve 21, second stacked unidirectional throttle valve 22, 3rd flow regulating valve 23, 4th flow regulating valve 24, 3rd No leakage solenoid directional control valve 25, 4th No leakage solenoid directional control valve 26, 3rd plug-in type by pass valve 27, 4th plug-in type by pass valve 28, second electromagnetic valve 29, 3rd electromagnetic valve 30, electromagnetism check valve 31, first auxiliary roller hydraulic actuating cylinder 32, second auxiliary roller hydraulic actuating cylinder 33, first home roll hydraulic actuating cylinder 34, second home roll hydraulic actuating cylinder 35, first auxiliary roller hydraulic actuating cylinder rodless cavity energy storage 36, second auxiliary roller hydraulic actuating cylinder rodless cavity energy storage 37, first home roll hydraulic actuating cylinder rodless cavity energy storage 38, second home roll hydraulic actuating cylinder rodless cavity energy storage 39, first auxiliary roller hydraulic actuating cylinder rod chamber energy storage 40, second auxiliary roller hydraulic actuating cylinder rod chamber energy storage 41, first home roll hydraulic actuating cylinder rod chamber energy storage 42, second home roll hydraulic actuating cylinder rod chamber energy storage 43.
First oil pump 2, first filter 4, first check valve 6 is connected, then the pressurization oil feed line that form first oil pump 2 in parallel with the first electromagnetic relief valve 8, wherein the effect of the first electromagnetic relief valve 8 carries out overflow when oil pressure exceedes limit value, prevents the too high damage equipment of oil pressure.
Second oil pump 3, second filter 5, second check valve 7 is connected, then the pressurization oil feed line that form second oil pump 3 in parallel with the second electromagnetic relief valve 9, wherein the effect of electromagnetic relief valve 9 carries out overflow when oil pressure exceedes limit value, prevents the too high damage equipment of oil pressure.
The pressurization oil feed line of the first oil pump 2 is all connected with fuel tank and annex 1 with the entrance of the pressurization oil feed line of the second oil pump 3, the outlet of these two pressurization oil feed lines forms associating pressurization oil feed line by the first electromagnetic valve 10 parallel connection on the one hand, on the other hand, the pressurization oil feed line outlet of the first oil pump 2 is connected with the P mouth of the first solenoid directional control valve 17, and the pressurization oil feed line outlet of the second oil pump 3 is connected with the P mouth of the second solenoid directional control valve 18.
First electromagnetic valve 10 connects the first oil pump 2 and the second oil pump 3, and when the first electromagnetic valve 10 disconnects, the first oil pump 2 and the second oil pump 3 can independently pressurize as required, revise the pressure in home roll and auxiliary roller hydraulic loaded loop, is conducive to the stable of pressure; When the first electromagnetic valve 10 is communicated with, the first oil pump 2 and the second oil pump 3 associated working, promotes pressing speed.
First solenoid directional control valve 17, the 3rd check valve 19, first stacked unidirectional throttle valve 21 are connected the pressurization oil feed line of formation first auxiliary roller hydraulic actuating cylinder 32 and the second auxiliary roller hydraulic actuating cylinder 33 successively, when P mouth and the conducting of A mouth of the first solenoid directional control valve 17, then to the rod chamber fuel feeding of the first auxiliary roller hydraulic actuating cylinder 32 and the second auxiliary roller hydraulic actuating cylinder 33, when P mouth and the conducting of B mouth of the first solenoid directional control valve 17, then to the rodless cavity fuel feeding of the first auxiliary roller hydraulic actuating cylinder 32 and the second auxiliary roller hydraulic actuating cylinder 33.
The effect of the first plug-in type by pass valve 11 carries out overflow when the first auxiliary roller hydraulic actuating cylinder 32 and the second auxiliary roller hydraulic actuating cylinder 33 rod chamber oil pressure exceed limit value, prevents the too high damage equipment of oil pressure.First throttle valve 13, first No leakage solenoid directional control valve 15 is connected in series the decompression oil return line of formation first auxiliary roller hydraulic actuating cylinder 32 and the second auxiliary roller hydraulic actuating cylinder 33 rod chamber.
The effect of the 3rd plug-in type by pass valve 27 carries out overflow when the first auxiliary roller hydraulic actuating cylinder 32 and the second auxiliary roller hydraulic actuating cylinder 33 rodless cavity oil pressure exceed limit value, prevents the too high damage equipment of oil pressure.3rd flow regulating valve 23, the 3rd No leakage solenoid directional control valve 25 are connected in series the decompression oil return line of formation first auxiliary roller hydraulic actuating cylinder 32 and the second auxiliary roller hydraulic actuating cylinder 33 rodless cavity.
Second solenoid directional control valve 18, the 4th check valve 20, second stacked unidirectional throttle valve 22 are connected the pressurization oil feed line of formation first home roll hydraulic actuating cylinder 34 and the second home roll hydraulic actuating cylinder 35 successively, wherein, when P mouth and the conducting of A mouth of the second solenoid directional control valve 18, then to the rod chamber fuel feeding of the first home roll hydraulic actuating cylinder 34 and the second home roll hydraulic actuating cylinder 35, when the shelves P mouth of the second solenoid directional control valve 18 and the conducting of B mouth, then to the rodless cavity fuel feeding of the first home roll hydraulic actuating cylinder 34 and the second home roll hydraulic actuating cylinder 35.
The effect of the 4th plug-in type by pass valve 28 carries out overflow when the first home roll hydraulic actuating cylinder 34 and the second home roll hydraulic actuating cylinder 35 rod chamber oil pressure exceed limit value, prevents the too high damage equipment of oil pressure.4th flow regulating valve 24, the 4th No leakage solenoid directional control valve 26 are connected in series the decompression oil return line of formation first home roll hydraulic actuating cylinder 34 and the second home roll hydraulic actuating cylinder 35 rod chamber.The effect of the second plug-in type by pass valve 12 carries out overflow when the first home roll hydraulic actuating cylinder 34 and the second home roll hydraulic actuating cylinder 35 rodless cavity oil pressure exceed limit value, prevents the too high damage equipment of oil pressure.Second throttle 14, second No leakage solenoid directional control valve 16 is connected in series the decompression oil return line of formation first home roll hydraulic actuating cylinder 34 and the second home roll hydraulic actuating cylinder 35 rodless cavity.
Second electromagnetic valve 29 by auxiliary roller hydraulic actuating cylinder 32 with 32 rod chamber be connected with rodless cavity.
3rd battery valve 30 by home roll hydraulic actuating cylinder 34 with 35 rod chamber be connected with rodless cavity.
Electromagnetism check valve 31 realizes the unidirectional connection from the rod chamber of the first and second home roll hydraulic actuating cylinders 34 and 35 to the rodless cavity of auxiliary roller hydraulic actuating cylinder 32 and 32.
The rodless cavity of the first auxiliary roller hydraulic actuating cylinder 32 is connected with the first auxiliary roller rodless cavity energy storage 36, and the rod chamber of the first auxiliary roller hydraulic actuating cylinder 32 is connected with the first auxiliary roller rod chamber energy storage 40.
The rodless cavity of the second auxiliary roller hydraulic actuating cylinder 33 is connected with the second auxiliary roller rodless cavity energy storage 37, and the rod chamber of the second auxiliary roller hydraulic actuating cylinder 33 is connected with the second auxiliary roller rod chamber energy storage 41.
The rodless cavity of the first home roll hydraulic actuating cylinder 34 is connected with the first home roll rodless cavity energy storage 38, and the rod chamber of the first home roll hydraulic actuating cylinder 34 is connected with the first home roll rod chamber energy storage 38.
The rodless cavity of the second home roll hydraulic actuating cylinder 35 is connected with the second home roll rodless cavity energy storage 39, and the rod chamber of the second home roll hydraulic actuating cylinder 34 is connected with the second home roll rod chamber energy storage 43.
First and second auxiliary roller hydraulic actuating cylinder rodless cavity energy storages 36 and 37, first and second home roll hydraulic actuating cylinder rodless cavity energy storages 38 and 39, first and second auxiliary roller hydraulic actuating cylinder rod chamber energy storages 40 and 41, first and second home roll hydraulic actuating cylinder rod chamber energy storages 42 and 43 all belong to energy storage, and their effect reduces fluctuation of pressure and energy storage.During grinding roller pressurized operation, oil pump does not need to be kept on all, and utilizes the pressure in energy storage to realize pressurization.The oil pocket UNICOM of energy storage and oil cylinder, pressure is also approximately equal.
The method using grinding roller of vertical mill hydraulic pressure described in above-described embodiment to rise roller system is:
Step one, open the 3rd electromagnetic valve 30, make rod chamber and the rodless cavity conducting of the first and second home roll hydraulic actuating cylinders 34 and 35, carry out differentially rising roller.Now, the first home roll hydraulic actuating cylinder 34 and declining with the rod chamber pressure (6.5Mpa) of the second home roll 35, the first home roll hydraulic actuating cylinder 34 and rising with the rodless cavity pressure (2.0Mpa) of the second home roll 35.
After step 2, delay certain hour, when the first home roll hydraulic actuating cylinder 34 with rod chamber pressure and the first home roll hydraulic actuating cylinder 34 of the second home roll 35 with when being less than 1.0Mpa with the rodless cavity difference of pressure of the second home roll 35, now the first home roll hydraulic actuating cylinder 34 and and the rod chamber pressure of the second home roll 35 become 5.0Mpa, first home roll hydraulic actuating cylinder 34 and and the rodless cavity pressure of the second home roll 35 become 4.0Mpa, then close the 3rd electromagnetic valve 30.
Step 3, start the first oil pump 2 and the second oil pump 3, open the first electromagnetic valve 10, first oil pump 2 and the second oil pump 3 parallel connection associating fuel feeding.Second solenoid directional control valve 18 electricly must make the conducting of P and B mouth, by the first oil pump 2 and the second oil pump 3 simultaneously to the quick fuel feeding of rodless cavity of main first roller hydraulic actuating cylinder 34 and the second home roll hydraulic actuating cylinder 35, the rodless cavity pressure of the first home roll hydraulic actuating cylinder 34 and the second home roll hydraulic actuating cylinder 35 raises, when after the rodless cavity oil pressure counter first home roll hydraulic actuating cylinder 34 of the first home roll hydraulic actuating cylinder 34 and the second home roll hydraulic actuating cylinder 35 and the rod chamber oil pressure of the second home roll hydraulic actuating cylinder 35 and the deadweight of home roll (and mechanism), home roll will rise.Now due to the movement of the piston of the first home roll hydraulic actuating cylinder 34 and the second home roll hydraulic actuating cylinder 35, rod chamber volume reduces gradually, and rod chamber pressure rises to some extent.
Step 4, postpone certain hour, open electromagnetism check valve 31, rod chamber pressure (being increased to 6.0Mpa) due to the first home roll hydraulic actuating cylinder 34 and the second home roll hydraulic actuating cylinder 35 is greater than the rodless cavity pressure (2.0Mpa) of the first auxiliary roller hydraulic actuating cylinder 32 and the second auxiliary roller hydraulic actuating cylinder 33, the rod chamber of the first home roll hydraulic actuating cylinder 34 and the second home roll hydraulic actuating cylinder 35 is to the rodless cavity fuel feeding of the first auxiliary roller hydraulic actuating cylinder 32 and the second auxiliary roller hydraulic actuating cylinder 33, after the deadweight of the first auxiliary roller hydraulic actuating cylinder 32 and the auxiliary roller hydraulic actuating cylinder of the second auxiliary roller hydraulic actuating cylinder 33 rodless cavity oil pressure counter first 32 and the second auxiliary roller hydraulic actuating cylinder 33 rod chamber oil pressure (4.0Mpa) and auxiliary roller (and mechanism), auxiliary roller rises, now the first home roll hydraulic actuating cylinder 34 and the second home roll hydraulic actuating cylinder 35 rod chamber pressure drop, first auxiliary roller hydraulic actuating cylinder 32 and the second auxiliary roller hydraulic actuating cylinder 33 rodless cavity pressure increase, first auxiliary roller hydraulic actuating cylinder 32 and the second auxiliary roller hydraulic actuating cylinder 33 rod chamber pressure increase.
Step 5, when the first home roll hydraulic actuating cylinder 34 and the second home roll hydraulic actuating cylinder 35 rod chamber pressure and the first auxiliary roller hydraulic actuating cylinder 32 and the second auxiliary roller hydraulic actuating cylinder 33 rodless cavity difference of pressure are less than 2Mpa, close electromagnetism check valve 31.
Step 6, when home roll is increased to most significant bit, P mouth and the B mouth of the second solenoid directional control valve 18 disconnect, and home roll is locked in most significant bit.Now detect auxiliary roller and whether arrive most significant bit, if do not arrive most significant bit, the then P mouth of the first solenoid directional control valve 17 and the conducting of B mouth, first oil pump 2 and the second oil pump 3 continue fuel feeding to the rodless cavity of the first auxiliary roller hydraulic actuating cylinder 32 and the second auxiliary roller hydraulic actuating cylinder 33, when auxiliary roller is increased to most significant bit, P mouth and the B mouth of the first solenoid directional control valve 17 disconnect, and auxiliary roller is locked in most significant bit.Now, the first oil pump 2 and the second oil pump 3 oil pump stop.
Claims (6)
1. a grinding roller of vertical mill hydraulic pressure rises roller system, it is characterized in that, comprise fuel tank and annex (1), first oil pump (2), second oil pump (3), first electromagnetic valve (10), first No leakage solenoid directional control valve (15), second No leakage solenoid directional control valve (16), first solenoid directional control valve (17), second solenoid directional control valve (18), 3rd No leakage solenoid directional control valve (25), 4th No leakage solenoid directional control valve (26), electromagnetism check valve (31), first auxiliary roller hydraulic actuating cylinder (32), first home roll hydraulic actuating cylinder (34), first auxiliary roller hydraulic actuating cylinder (32) has the first auxiliary roller hydraulic actuating cylinder rod chamber (44-2), first auxiliary roller hydraulic actuating cylinder rodless cavity (45-2), first auxiliary roller hydraulic cylinder piston (46-2), first home roll hydraulic actuating cylinder (34) has the first home roll hydraulic actuating cylinder rod chamber (44-1), the first home roll hydraulic actuating cylinder rodless cavity (45-1), the first home roll hydraulic cylinder piston (46-1),
Be connected with electromagnetic valve (10) between first oil pump (2) and the second oil pump (3), form double pump system; Electromagnetism check valve (31) is connected with between the rodless cavity (45-2) of the rod chamber (44-1) of the first home roll hydraulic actuating cylinder (34) and the first auxiliary roller hydraulic actuating cylinder (32); First home roll hydraulic cylinder piston (46-1) is connected with home roll by transmission device.
2. grinding roller of vertical mill hydraulic pressure as claimed in claim 1 rises roller system, it is characterized in that, is rising in roller process,
First open electromagnetic valve (10) the first oil pump (2) and the second oil pump (3) are combined to rodless cavity (45-1) fuel feeding of the first home roll hydraulic actuating cylinder (34), make its hydraulic cylinder piston (46-1) increase;
After home roll lifting certain altitude, conducting electromagnetism check valve (31), a part of hydraulic oil that the rod chamber (44-1) of the first home roll hydraulic actuating cylinder (34) is discharged enters the rodless cavity (45-2) of the first auxiliary roller hydraulic actuating cylinder (32) through electromagnetism check valve (31);
When the difference of pressure of the pressure of the rod chamber (44-1) of the first home roll hydraulic actuating cylinder (34) and the rodless cavity (45-2) of the first auxiliary roller hydraulic actuating cylinder (32) is less than setting value, close electromagnetism check valve (31), after waiting for that home roll is raised to most significant bit, disconnect rodless cavity (45-1) fuel feeding of solenoid directional control valve (18) stopping to the first home roll hydraulic actuating cylinder (34), home roll is locked in extreme higher position;
Now, as auxiliary roller does not arrive extreme higher position, solenoid directional control valve (17) is communicated with the rodless cavity (45-2) of the first auxiliary roller hydraulic actuating cylinder (32), and the first oil pump (2) and the second oil pump (3) make auxiliary roller be raised to extreme higher position to its fuel feeding.
3. grinding roller of vertical mill hydraulic pressure as claimed in claim 1 rises roller system, it is characterized in that, also comprise, first filter (4), second filter (5), first check valve (6), second check valve (7), first electromagnetic relief valve (8), second electromagnetic relief valve (9), first plug-in type by pass valve (11), second plug-in type by pass valve (12), first throttle valve (13), second throttle (14), 3rd check valve (19), 4th check valve (20), first stacked unidirectional throttle valve (21), second stacked unidirectional throttle valve (22), 3rd flow regulating valve (23), 4th flow regulating valve (24), 3rd plug-in type by pass valve (27), 4th plug-in type by pass valve (28), second electromagnetic valve (29), 3rd electromagnetic valve (30), second auxiliary roller hydraulic actuating cylinder (33), second home roll hydraulic actuating cylinder (35), first auxiliary roller hydraulic actuating cylinder rodless cavity energy storage (36), second auxiliary roller hydraulic actuating cylinder rodless cavity energy storage (37), first home roll hydraulic actuating cylinder rodless cavity energy storage (38), second home roll hydraulic actuating cylinder rodless cavity energy storage (39), first auxiliary roller hydraulic actuating cylinder rod chamber energy storage (40), second auxiliary roller hydraulic actuating cylinder rod chamber energy storage (41), first home roll hydraulic actuating cylinder rod chamber energy storage (42), second home roll hydraulic actuating cylinder rod chamber energy storage (43),
First oil pump (2), the first filter (4), the first check valve (6) are connected, then in parallel with the first electromagnetic relief valve (8);
Second oil pump (3), the second filter (5), the second check valve (7) are connected, then in parallel with the second electromagnetic relief valve (9);
The pressurization oil feed line of the first oil pump (2) is all connected with fuel tank and annex (1) with the entrance of the pressurization oil feed line of the second oil pump (3), the pressurization oil feed line outlet of the first oil pump (2) is connected with the P mouth of the first solenoid directional control valve (17), and the pressurization oil feed line outlet of the second oil pump (3) is connected with the P mouth of the second solenoid directional control valve (18);
First solenoid directional control valve (17), the 3rd check valve (19), the first stacked unidirectional throttle valve (21) are connected the pressurization oil feed line of formation first auxiliary roller hydraulic actuating cylinder (32) and the second auxiliary roller hydraulic actuating cylinder (33) successively;
First throttle valve (13), the first No leakage solenoid directional control valve (15) are connected in series the decompression oil return line of formation first auxiliary roller hydraulic actuating cylinder (32) and the second auxiliary roller hydraulic actuating cylinder (33) rod chamber;
Second solenoid directional control valve (18), the 4th check valve (20), the second stacked unidirectional throttle valve (22) are connected the pressurization oil feed line of formation first home roll hydraulic actuating cylinder (34) and the second home roll hydraulic actuating cylinder (35) successively, and the 4th flow regulating valve (24), the 4th No leakage solenoid directional control valve (26) are connected in series the decompression oil return line of formation first home roll hydraulic actuating cylinder (34) and the second home roll hydraulic actuating cylinder (35) rod chamber;
Second throttle (14), the second No leakage solenoid directional control valve (16) are connected in series the decompression oil return line of formation first home roll hydraulic actuating cylinder (34) and the second home roll hydraulic actuating cylinder (35) rodless cavity;
First auxiliary roller hydraulic actuating cylinder (32) is connected by the second electromagnetic valve (29) with rodless cavity with the rod chamber of the second auxiliary roller hydraulic actuating cylinder (33);
First home roll hydraulic actuating cylinder (34) is connected by the 3rd electromagnetic valve (30) with rodless cavity with the rod chamber of the second home roll hydraulic actuating cylinder (35);
The rodless cavity of the first auxiliary roller hydraulic actuating cylinder (32) is connected with the first auxiliary roller rodless cavity energy storage (36), and the rod chamber of the first auxiliary roller hydraulic actuating cylinder (32) is connected with the first auxiliary roller rod chamber energy storage (40);
The rodless cavity of the second auxiliary roller hydraulic actuating cylinder (33) is connected with the second auxiliary roller rodless cavity energy storage (37), and the rod chamber of the second auxiliary roller hydraulic actuating cylinder (33) is connected with the second auxiliary roller rod chamber energy storage (41);
The rodless cavity of the first home roll hydraulic actuating cylinder (34) is connected with the first home roll rodless cavity energy storage (38), and the rod chamber of the first home roll hydraulic actuating cylinder (34) is connected with the first home roll rod chamber energy storage (38);
The rodless cavity of the second home roll hydraulic actuating cylinder (35) is connected with the second home roll rodless cavity energy storage (39), and the rod chamber of the second home roll hydraulic actuating cylinder (34) is connected with the second home roll rod chamber energy storage (43).
4. grinding roller of vertical mill hydraulic pressure as claimed in claim 3 rises roller system, it is characterized in that, when P mouth and the conducting of A mouth of the first solenoid directional control valve (17), then to the rod chamber fuel feeding of the first auxiliary roller hydraulic actuating cylinder (32) and the second auxiliary roller hydraulic actuating cylinder (33), when P mouth and the conducting of B mouth of the first solenoid directional control valve (17), then to the rodless cavity fuel feeding of the first auxiliary roller hydraulic actuating cylinder (32) and the second auxiliary roller hydraulic actuating cylinder (33).
5. grinding roller of vertical mill hydraulic pressure as claimed in claim 3 rises roller system, it is characterized in that, when P mouth and the conducting of A mouth of the second solenoid directional control valve (18), then to the rod chamber fuel feeding of the first home roll hydraulic actuating cylinder (34) and the second home roll hydraulic actuating cylinder (35), when the P mouth of shelves the second solenoid directional control valve (18) and the conducting of B mouth, then to the rodless cavity fuel feeding of the first home roll hydraulic actuating cylinder (34) and the second home roll hydraulic actuating cylinder (35).
6. grinding roller of vertical mill hydraulic pressure as claimed in claim 3 rises roller system, and it is characterized in that, its using method is:
Step one, open the 3rd electromagnetic valve (30), make rod chamber and the rodless cavity conducting of the first home roll hydraulic actuating cylinder (34) and the second home roll hydraulic actuating cylinder (35), carry out differentially rising roller;
After step 2, delay certain hour, when the first home roll hydraulic actuating cylinder (34) with rod chamber pressure and the first home roll hydraulic actuating cylinder (34) of the second home roll (35) with when being less than 1.0Mpa with the rodless cavity difference of pressure of the second home roll (35), now the first home roll hydraulic actuating cylinder (34) and and the rod chamber pressure of the second home roll (35) become 5.0Mpa, first home roll hydraulic actuating cylinder (34) and and the rodless cavity pressure of the second home roll (35) become 4.0Mpa, then close the 3rd electromagnetic valve (30);
Step 3, start the first oil pump (2) and the second oil pump (3), open the first electromagnetic valve (10), the first oil pump (2) and the second oil pump (3) parallel connection associating fuel feeding, second solenoid directional control valve (18) electricly must make the conducting of P and B mouth, by the first oil pump (2) and the second oil pump (3) simultaneously to the quick fuel feeding of rodless cavity of main first roller hydraulic actuating cylinder (34) and the second home roll hydraulic actuating cylinder 3 (5), the rodless cavity pressure of the first home roll hydraulic actuating cylinder (34) and the second home roll hydraulic actuating cylinder (35) raises, when after the rodless cavity oil pressure counter first home roll hydraulic actuating cylinder (34) of the first home roll hydraulic actuating cylinder (34) and the second home roll hydraulic actuating cylinder (35) and the rod chamber oil pressure of the second home roll hydraulic actuating cylinder (35) and the deadweight of home roll, home roll rises, now the rod chamber volume of the first home roll hydraulic actuating cylinder (34) and the second home roll hydraulic actuating cylinder (35) reduces gradually, rod chamber pressure increase,
Step 4, postpone certain hour, open electromagnetism check valve (31), the rod chamber of the first home roll hydraulic actuating cylinder (34) and the second home roll hydraulic actuating cylinder (35) is to the rodless cavity fuel feeding of the first auxiliary roller hydraulic actuating cylinder (32) and the second auxiliary roller hydraulic actuating cylinder (33), after the deadweight of the first auxiliary roller hydraulic actuating cylinder (32) and the second auxiliary roller hydraulic actuating cylinder (32) of auxiliary roller hydraulic actuating cylinder (33) rodless cavity oil pressure counter first and the second auxiliary roller hydraulic actuating cylinder (33) rod chamber oil pressure and auxiliary roller, auxiliary roller rises, now the first home roll hydraulic actuating cylinder (34) and the second home roll hydraulic actuating cylinder (35) rod chamber pressure drop, first auxiliary roller hydraulic actuating cylinder (32) and the second auxiliary roller hydraulic actuating cylinder (33) rodless cavity pressure increase, first auxiliary roller hydraulic actuating cylinder (32) and the second auxiliary roller hydraulic actuating cylinder (33) rod chamber pressure increase,
Step 5, when the first home roll hydraulic actuating cylinder (34) and the second home roll hydraulic actuating cylinder (35) rod chamber pressure and the first auxiliary roller hydraulic actuating cylinder (32) and the second auxiliary roller hydraulic actuating cylinder (33) rodless cavity difference of pressure are less than 2Mpa, close electromagnetism check valve (31);
Step 6, when home roll is increased to most significant bit, P mouth and the B mouth of the second solenoid directional control valve (18) disconnect, and home roll is locked in most significant bit; Now detect auxiliary roller and whether arrive most significant bit, if do not arrive most significant bit, the then P mouth of the first solenoid directional control valve (17) and the conducting of B mouth, first oil pump (2) and the second oil pump (3) continue fuel feeding to the rodless cavity of the first auxiliary roller hydraulic actuating cylinder (32) and the second auxiliary roller hydraulic actuating cylinder (33), when auxiliary roller is increased to most significant bit, P mouth and the B mouth of the first solenoid directional control valve (17) disconnect, and auxiliary roller is locked in most significant bit; Now, the first oil pump (2) and the second oil pump (3) work is stopped.
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| CN201410542755.4A CN104944326B (en) | 2014-10-14 | 2014-10-14 | A kind of grinding roller of vertical mill rises roller system with hydraulic pressure |
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| CN105221500A (en) * | 2015-10-22 | 2016-01-06 | 浙江大学 | The TBM rear support hydraulic system of single double pump pattern switching and pressurize |
| CN107013518A (en) * | 2016-01-27 | 2017-08-04 | 鞍钢股份有限公司 | A kind of polishing machine hydraulic pressure pressure upper controller and method |
| CN108514926A (en) * | 2018-04-04 | 2018-09-11 | 沈阳东北电力调节技术有限公司 | A kind of roller-plate Vertical Mill from pressurization fall roller operating mode to grinding operating mode differentiation conversion method |
| CN110388341A (en) * | 2019-07-22 | 2019-10-29 | 深圳东风汽车有限公司 | The control method that the solenoid valve of hydraulic system commutates without clamping stagnation |
| CN113304865A (en) * | 2021-05-19 | 2021-08-27 | 北京京能电力股份有限公司 | Vibration-proof control system and method for coal mill and storage medium |
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| CN110388341A (en) * | 2019-07-22 | 2019-10-29 | 深圳东风汽车有限公司 | The control method that the solenoid valve of hydraulic system commutates without clamping stagnation |
| CN113304865A (en) * | 2021-05-19 | 2021-08-27 | 北京京能电力股份有限公司 | Vibration-proof control system and method for coal mill and storage medium |
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| CN104944326B (en) | 2017-10-03 |
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