CN104074817B - Hydraulic control system of four-roller vertical slag mill grinding roller - Google Patents
Hydraulic control system of four-roller vertical slag mill grinding roller Download PDFInfo
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- CN104074817B CN104074817B CN201410316878.6A CN201410316878A CN104074817B CN 104074817 B CN104074817 B CN 104074817B CN 201410316878 A CN201410316878 A CN 201410316878A CN 104074817 B CN104074817 B CN 104074817B
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Abstract
The invention discloses a hydraulic control system of a four-roller vertical slag mill grinding roller and relates to a vertical mill of the smashing mechanism field. The hydraulic control system comprises a hydraulic pump station system, the oil outlet of the hydraulic pump station system is connected with the port P of a reversing valve through an oil way, the port A of the reversing valve is connected with a rod cavity of the hydraulic cylinder through an oil way, a rod-less cavity of the hydraulic cylinder is connected with the port B of the reversing valve through an oil way, and the port T of the reversing valve is connected with an oil tank through an oil way; the hydraulic control system further comprises a first ball valve and a second ball valve, one end of the first ball valve is connected with the rod cavity of the hydraulic cylinder through an oil way, and the other end of the first ball valve is connected with the port A of the reversing valve through an oil way; one end of the second ball valve is connected with the rod-less cavity of the hydraulic cylinder through an oil way, and the other end of the second ball valve is connected with the port B of the reversing valve through an oil way; there are a plurality of hydraulic cylinders which are symmetrically arranged in a regular polygon shape. The hydraulic cylinders are pressurized simultaneously, and the pressure is relieved simultaneously to simultaneously lift the grinding roller and pressurize the grinding roller.
Description
Technical field
The present invention relates to a kind of vertical grinder in size reduction machinery field, refer in particular to the hydraulic pressure control of four-roller slag vertical grinding roller
System processed.
Background technology
Two problems of the hydraulic control system generally existing of existing grinding roller of vertical mill, first, due to grinding roller manufacture installation etc.
Reason, some grinding rollers of Vertical Mill are lifted to and have been pushed up and some grinding rollers also do not move, and Vertical Mill generally existing lifts the nonsynchronous phenomenon of roller, causes
Grinding roller clashes into vertical mill casing；Second, two grinding rollers that existing system will be realized in four-roller Vertical Mill work independently needs supporting pair
The pressurized hydraulic system of system, systematic comparison is loaded down with trivial details.
Content of the invention
It is an object of the present invention to proposition one kind can lift roller to grinding roller, pressurization simultaneously avoids grinding roller and Vertical Mill simultaneously
The hydraulic control system that housing clashes into；
Further object is that proposing two mills that a kind of a set of hydraulic system can be achieved with four-roller Vertical Mill
The hydraulic control system that roller works independently.
For achieving the above object, provide following technical scheme:
The hydraulic control system of four-roller slag vertical grinding roller, including hydraulic power unit system, reversal valve and hydraulic cylinder, hydraulic pump
The oil-out of system of standing is connected with the p mouth of reversal valve by oil circuit, and a mouth of reversal valve passes through oil circuit with hydraulic cylinder rod chamber even
Connect, hydraulic cylinder rodless cavity is connected with the b mouth of reversal valve by oil circuit, and the t mouth of reversal valve is connected with fuel tank by oil circuit, its feature
It is, also include the first ball valve and the second ball valve, one end of described first ball valve is connected with hydraulic cylinder rod chamber by oil circuit, the
The other end of one ball valve is connected with a mouth of reversal valve by oil circuit；Oil circuit is passed through with hydraulic cylinder no in one end of described second ball valve
Rod cavity connects, and the other end of the second ball valve is connected with the b mouth of reversal valve by oil circuit；Described hydraulic cylinder is multiple, becomes just polygon
Shape is symmetrical arranged.Multiple hydraulic cylinders are pressurizeed, simultaneously pressure release simultaneously, realize lifting grinding roller simultaneously, pressurize to grinding roller simultaneously.Close
The ball valve corresponding with opening each grinding roller, realizes reasonably controlling several grinding rollers to work independently respectively.In order to ensure machine fortune
The stationarity of row, multiple work grinding rollers must be symmetrical arranged.
Preferably, also include No leakage Solenoid ball valve, oil circuit and the second ball are passed through in one end of described No leakage Solenoid ball valve
Valve connects away from hydraulic cylinder one end, and the other end of No leakage Solenoid ball valve is connected with the b mouth of reversal valve by oil circuit.
Further, also include flow speed control valve, oil circuit and No leakage Solenoid ball valve are passed through away from the in one end of described flow speed control valve
Two ball valve one end connect, and the other end of flow speed control valve is connected with the b mouth of reversal valve by oil circuit.Make the hydraulic fluid flow rate in oil circuit permanent
Fixed constant, and then the The hydraulic oil flowing in each hydraulic cylinder rodless cavity is identical, realizes synchronous lift roller, it is to avoid some grinding rollers lift
Come and some grinding rollers also do not move.
Preferably, also include hydraulic control one-way valve, the oil circuit control interface of described hydraulic control one-way valve passes through oil circuit and reversal valve
B mouth connect；Hydraulic control one-way valve oil-in is connected with a mouth of reversal valve by oil circuit, and hydraulic control one-way valve oil-out passes through oil circuit
It is connected away from the oil-in of hydraulic cylinder one end and two logical cone valves with the first ball valve；The oil-out of two logical cone valves passes through oil circuit and fuel tank
Connect.When lifting roller, enable quickly to lift roller, improve the efficiency of system operation.
Further, also include the 3rd ball valve, a hydraulic fluid port of described 3rd ball valve passes through the one of oil circuit and two logical cone valves
Individual hydraulic fluid port connects, and another hydraulic fluid port of the 3rd ball valve is passed through oil circuit and is connected with another hydraulic fluid port of two logical cone valves.When needing to two
When logical cone valve maintenance is with changing, the continual work of system can be made temporarily using the 3rd ball valve, not affect the overall work of equipment
Make.
Preferably, first pressure transmitter, first pressure table, second pressure transmitter and second pressure table are also included, the
The pressure interface of one pressure transmitter and first pressure table are connected away from hydraulic cylinder one end with the first ball valve by oil circuit；Second pressure
The pressure interface of power transmitter and second pressure table are connected away from hydraulic cylinder one end with the second ball valve by oil circuit；First pressure becomes
The signal cable line sending device is connected with the signal input part of controller, and the signal output part of controller is defeated with the signal of two logical cone valves
Enter end to connect；The signal cable line of second pressure transmitter is connected with the signal input part of controller, the signal output of controller
End is connected with the signal input part of No leakage Solenoid ball valve.Avoid the excessive destruction causing system of the pressure in oil circuit, make system
Can steadily safety operation.
Preferably, described hydraulic power unit system includes unidirectional quantitative hydraulic pump, motor, high pressure filter and filter, institute
State filter to be arranged in fuel tank and be connected with the oil-in of unidirectional quantitative hydraulic pump by oil circuit；The clutch end of motor
It is connected with the power intake of unidirectional quantitative hydraulic pump；The oil-out of unidirectional quantitative hydraulic pump passes through the oil-feed of oil circuit and check valve
Mouth connects, and the oil-out of check valve is connected with one end of high pressure filter by oil circuit, and the other end of high pressure filter passes through oil
Road is connected with the p mouth of reversal valve.
Preferably, also include overflow valve, p mouth and the 3rd pressure gauge of oil circuit and reversal valve is passed through in one end of described overflow valve
Connect, the other end of overflow valve is connected with fuel tank by oil circuit.Avoid the excessive destruction causing system of the pressure in oil circuit, make be
System can steadily safety operation.
Preferably, rod chamber one end of described hydraulic cylinder is connected with four accumulators, rodless cavity one end and two of hydraulic cylinder
Individual accumulator connects.Energy in accumulator can ensure that the steady operation of hydraulic cylinder, and does not need hydraulic power unit system even
Continuous work, decreases the operating pressure of hydraulic power unit system moreover it is possible to energy saving.
Preferably, setting having heaters and thermometer in described fuel tank, fuel tank sidewall is provided with liquid level gauge, tank bottoms
It is provided with unloading port, unloading port is connected with the 5th ball valve.When the temperature is low, start heater hydraulic oil is heated, from
Thermometer can directly observe the temperature of hydraulic oil, can directly observe the surplus of hydraulic oil from liquid level gauge, work as needs
To during fuel tank cleaning maintenance, by unloading port, the pressure oil in fuel tank can be transferred out.
The invention has the benefit that
The a mouth of reversal valve is connected with a hydraulic fluid port of four the first ball valves simultaneously, another hydraulic fluid port of four the first ball valves
It is connected with the rodless cavity of four hydraulic cylinders respectively, the rod chamber of four hydraulic cylinders is connected with a hydraulic fluid port of four the second ball valves respectively
Connect, another hydraulic fluid port of four the second ball valves is connected with the b mouth of reversal valve.Realize multiple hydraulic cylinders are pressurizeed simultaneously, let out simultaneously
Pressure, reaches and lifts grinding roller simultaneously, pressurizes to grinding roller simultaneously.Close the ball valve corresponding with opening each grinding roller, realize rational
Several grinding rollers are controlled to work independently respectively.
Brief description
Structural representation when Fig. 1 pressurizes to grinding roller for the hydraulic control system of four-roller slag vertical grinding roller of the present invention；
Fig. 2 is that the hydraulic control system of four-roller slag vertical grinding roller of the present invention lifts structural representation during roller；
Fig. 3 is the enlarged drawing of reversal valve in the present invention.
Wherein: 01, hydraulic power unit system, 2, reversal valve, 3, hydraulic cylinder, the 4, first ball valve, the 5, second ball valve, 6, No leakage
Solenoid ball valve, 7, flow speed control valve, 8, hydraulic control one-way valve, 9, two logical cone valves, the 10, the 3rd ball valve, 11, first pressure transmitter, 12, the
One pressure gauge, 13, second pressure transmitter, 14, second pressure table, 15, overflow valve, the 16, the 3rd pressure gauge, 17, accumulator,
18th, heater, 19, liquid level gauge, 20, thermometer, the 21, the 5th ball valve, 22, fuel tank, the 23, the 4th ball valve, the 24, second high-pressure filteration
Device.
011st, unidirectional quantitative hydraulic pump, 012, motor, 013, check valve, the 014, first high pressure filter, 015, filter.
Specific embodiment
Below in conjunction with the accompanying drawings a most preferred embodiment of the present invention is described further, to help understanding in the present invention
Hold.
As shown in Figure 1 to Figure 3, the present invention includes hydraulic power unit system 01, the unidirectional quantitative liquid in hydraulic power unit system 01
Press pump 011 oil-in is inserted in fuel tank 22 by oil circuit, and the port that above-mentioned oil circuit is arranged in fuel tank 22 is provided with filter
015, the clutch end of motor 012 is connected with the power intake of unidirectional quantitative hydraulic pump 011；Unidirectional quantitative hydraulic pump 011
Oil-out be connected with the oil-in of check valve 013 by oil circuit, the oil-out of check valve 013 is pressed through with the first height by oil circuit
One end of filter 014 connects, and the other end of the first high pressure filter 014 is connected with the p mouth of reversal valve 2 by oil circuit.Reversal valve 2
A mouth be connected with hydraulic control one-way valve 8 oil-in by oil circuit, hydraulic control one-way valve 8 oil-out pass through oil circuit and four the first ball valves 4
Hydraulic fluid port connect, the other end of four the first ball valves 4 is connected with the rod chamber of four hydraulic cylinders 3 respectively by oil circuit；Four
The rodless cavity of individual hydraulic cylinder 3 is connected with a hydraulic fluid port of four the second ball valves 5 respectively by oil circuit, four the second ball valves 5 another
One hydraulic fluid port is connected with a hydraulic fluid port of four No leakage Solenoid ball valves 6 respectively by oil circuit, four No leakage Solenoid ball valves 6
Another hydraulic fluid port is connected with a hydraulic fluid port of four flow speed control valves 7 respectively by oil circuit, and another hydraulic fluid port of four flow speed control valves 7 passes through
Oil circuit is connected with a hydraulic fluid port of the 4th ball valve 23, and another hydraulic fluid port of the 4th ball valve 23 is passed through oil circuit and connected with the b mouth of reversal valve 2
Connect, the t mouth of reversal valve 2 is connected with a hydraulic fluid port of the second high pressure filter 24 by oil circuit, the second high pressure filter 24 another
One hydraulic fluid port is connected with fuel tank 22 by oil circuit.The oil circuit control interface of hydraulic control one-way valve 8 passes through the b mouth of oil circuit and reversal valve 2
Connect.Hydraulic control one-way valve 8 oil-out is passed through oil circuit and is connected with the oil-in of two logical cone valves 9, and the oil-out of two logical cone valves 9 passes through oil
Road is connected away from fuel tank 22 one end with the second high pressure filter 24.One end of overflow valve 15 pass through oil circuit and reversal valve 2 p mouth and
3rd pressure gauge 16 connects, and the other end of overflow valve 15 is connected with fuel tank 22 by oil circuit.Four first pressure transmitters 11
Pressure interface and four first pressure tables 12 are connected away from hydraulic cylinder 3 one end with four the first ball valves 4 respectively by oil circuit；Second
The pressure interface of pressure transmitter 13 and second pressure table 14 are connected away from hydraulic cylinder 3 one end with the second ball valve 5 by oil circuit；The
The signal cable line of one pressure transmitter 11 is connected with the signal input part of controller, and the signal output part of controller and two leads to cone
9 signal input parts of valve connect；The signal cable line of four second pressure transmitters 13 is connected with the signal input part of controller,
The signal output part of controller is connected with the signal input part of four No leakage Solenoid ball valves 6.The rod chamber one of each hydraulic cylinder 3
End is connected with four accumulators 17, and rodless cavity one end of each hydraulic cylinder 3 is connected with two accumulators 17.It is provided with fuel tank 22
Heater 18 and thermometer 20, fuel tank 22 side wall is provided with liquid level gauge 19, and fuel tank 22 bottom is provided with unloading port, unloading port with
5th ball valve 21 connects.First ball valve 4 and the second ball valve 5 are high pressure manual ball valve.3 one-tenth square symmetry of four hydraulic cylinders set
Put.
Specific works mode
When pressurizeing to grinding roller, the right position connection of reversal valve 2, No leakage Solenoid ball valve 6 is closed, and two logical cone valves 9 close, overflow
Valve 15 closes.Start motor 012, motor 012 drives unidirectional quantitative hydraulic pump 011 by the hydraulic oil in fuel tank 22 through filter
015 releases, and the p-a road passing sequentially through check valve 013, high pressure filter 014 and reversal valve 2 flows to entering of hydraulic control one-way valve 8
Hydraulic fluid port, from the oil-out of hydraulic control one-way valve 8 out after enter the rod chamber of four hydraulic cylinders 3 respectively through four the first ball valves 4
One end, pressurizes to four hydraulic cylinders 3, and four accumulators 17 accumulation of energy being connected with each hydraulic cylinder 3 rod chamber.Each hydraulic pressure
Hydraulic oil in cylinder 3 rodless cavity is flow in two accumulators 17 being connected with rodless cavity.
When the pressure on the oil circuit between the first ball valve 4 and hydraulic control one-way valve 8 exceedes the setting of first pressure transmitter 11
During value, by electric signal transmission to controller, controller controls two logical cone valves 9 to open, in fluid-control one-way to first pressure transmitter 11
Hydraulic oil in oil circuit between valve 8 and hydraulic cylinder 3 rod chamber flow to fuel tank by two logical cone valves 9 and the second high pressure filter 24
Interior.
When the pressure on the oil circuit between the second ball valve 5 and No leakage Solenoid ball valve 6 exceedes second pressure transmitter 13
During setting value, by electric signal transmission to controller, controller controls No leakage Solenoid ball valve 6 to open to second pressure transmitter 13,
Then the hydraulic oil flowing out from four hydraulic cylinder 3 rodless cavities passes sequentially through 5, four No leakage electromagnetism of four the second ball valves respectively
Ball valve 6 and four flow speed control valves 7 flow to a hydraulic fluid port of the 4th ball valve 23, from another hydraulic fluid port of the 4th ball valve 23 out afterwards through
It is back to fuel tank 22 behind the b-t road of reversal valve 2 and the second high pressure filter 24.
When lifting grinding roller, the left position connection of reversal valve 2, No leakage Solenoid ball valve 6 is opened, and two logical cone valves 9 are opened, overflow valve
15 closures.Start motor 012, motor 012 drives unidirectional quantitative hydraulic pump 011 by the hydraulic oil in fuel tank 22 through filter
015 releases, and the p-b road passing sequentially through check valve 013, high pressure filter 014 and reversal valve 2 flows to of the 4th ball valve 23
Hydraulic fluid port, out sequentially passes through 7, four No leakage Solenoid ball valves of four flow speed control valves afterwards respectively from another hydraulic fluid port of the 4th ball valve 23
6 and four the second ball valves 5 after respectively enter the rodless cavity of four hydraulic cylinders 3.Hydraulic oil in four hydraulic cylinder 3 rod chambers is respectively
By after four the first ball valves 4 again through two logical cone valves 9 with the second high pressure filter 24 is laggard removes fuel tank 22.Now, due to liquid
The oil circuit control of control check valve 8 is connected with the b mouth of reversal valve 2, and the hydraulic oil from unidirectional quantitative hydraulic pump 011 makes fluid-control one-way
Valve 8 is reversely connected, from four the first ball valves 4 hydraulic oil out can through the a-t mouth of hydraulic control one-way valve 8 and reversal valve 2 and
Second high pressure filter 24 is laggard to remove fuel tank 22, realizes quick lifting roller.
When the system is operated, the pressure of the oil circuit between the first high pressure filter 014 and reversal valve 2 exceedes the 15 of overflow valve
When setting pressure, overflow valve 15 is opened, and hydraulic oil is back in fuel tank 22 through overflow valve 15 and the second high pressure filter 24.
When needing grinding roller is overhauled it is only necessary to by need maintenance grinding roller and therewith symmetrically arranged grinding roller with turning over
Roller oil cylinder produces Vertical Mill, closes grinding roller door, after the first ball valve 4 on the corresponding oil circuit of closing and the second ball valve 5, grinding roller is examined
Repair, do not affect other do not need overhaul grinding roller normal work.
Claims (9)
1. the hydraulic control system of four-roller slag vertical grinding roller, including hydraulic power unit system (01), reversal valve (2) and hydraulic cylinder
(3), the oil-out of hydraulic power unit system (01) is connected with the p mouth of reversal valve (2) by oil circuit, and a mouth of reversal valve (2) passes through oil
Road is connected with hydraulic cylinder (3) rod chamber, and hydraulic cylinder (3) rodless cavity is connected with the b mouth of reversal valve (2) by oil circuit, reversal valve (2)
T mouth be connected with fuel tank (22) by oil circuit, also include the first ball valve (4) and the second ball valve (5), described first ball valve (4)
One end is connected with hydraulic cylinder (3) rod chamber by oil circuit, and the other end of the first ball valve (4) passes through a mouth of oil circuit and reversal valve (2)
Connect；One end of described second ball valve (5) is connected with hydraulic cylinder (3) rodless cavity by oil circuit, and the other end of the second ball valve (5) leads to
The b mouth crossing oil circuit with reversal valve (2) is connected；Described hydraulic cylinder (3) is multiple, becomes regular polygon to be symmetrical arranged；It is characterized in that,
Also include No leakage Solenoid ball valve (6), one end of described No leakage Solenoid ball valve (6) pass through oil circuit and the second ball valve (5) away from
Hydraulic cylinder (3) one end connects, and the other end of No leakage Solenoid ball valve (6) is connected with the b mouth of reversal valve (2) by oil circuit.
2. the hydraulic control system of four-roller slag vertical grinding roller as claimed in claim 1 is it is characterised in that also include flow speed control valve
(7), one end of described flow speed control valve (7) is connected away from the second ball valve (5) one end with No leakage Solenoid ball valve (6) by oil circuit, adjusts
The other end of fast valve (7) is connected with the b mouth of reversal valve (2) by oil circuit.
3. the hydraulic control system of four-roller slag vertical grinding roller as claimed in claim 1 is it is characterised in that also include hydraulic control list
To valve (8), the oil circuit control interface of described hydraulic control one-way valve (8) is connected with the b mouth of reversal valve (2) by oil circuit；Fluid-control one-way
Valve (8) oil-in is connected with a mouth of reversal valve (2) by oil circuit, and hydraulic control one-way valve (8) oil-out passes through oil circuit and the first ball valve
(4) oil-in away from hydraulic cylinder (3) one end and two logical cone valves (9) connects；The oil-out of two logical cone valves (9) passes through oil circuit and oil
Case (22) connects.
4. the hydraulic control system of four-roller slag vertical grinding roller as claimed in claim 3 is it is characterised in that also include the 3rd ball
Valve (10), a hydraulic fluid port of described 3rd ball valve (10) is passed through oil circuit and is connected with a hydraulic fluid port of two logical cone valves (9), the 3rd ball valve
(10) another hydraulic fluid port is passed through oil circuit and is connected with another hydraulic fluid port of two logical cone valves (9).
5. the hydraulic control system of four-roller slag vertical grinding roller as claimed in claim 1 is it is characterised in that also include the first pressure
Power transmitter (11), first pressure table (12), second pressure transmitter (13) and second pressure table (14), first pressure transmitter
(11) pressure interface and first pressure table (12) are connected away from hydraulic cylinder (3) one end with the first ball valve (4) by oil circuit；Second
The pressure interface of pressure transmitter (13) and second pressure table (14) pass through oil circuit and the second ball valve (5) away from hydraulic cylinder (3)
End connects；The signal cable line of first pressure transmitter (11) is connected with the signal input part of controller, and the signal of controller is defeated
The signal input part going out end with two logical cone valves (9) is connected；The signal cable line of second pressure transmitter (13) and the letter of controller
Number input connects, and the signal output part of controller is connected with the signal input part of No leakage Solenoid ball valve (6).
6. the hydraulic control system of four-roller slag vertical grinding roller as claimed in claim 1 is it is characterised in that described hydraulic power unit
System (01) includes unidirectional quantitative hydraulic pump (011), motor (012), high pressure filter (014) and filter (015), described mistake
Filter (015) is arranged in fuel tank (22) and is connected with the oil-in of unidirectional quantitative hydraulic pump (011) by oil circuit；Motor
(012) clutch end is connected with the power intake of unidirectional quantitative hydraulic pump (011)；Unidirectional quantitative hydraulic pump (011)
Oil-out is connected with the oil-in of check valve (013) by oil circuit, and the oil-out of check valve (013) passes through oil circuit and high-pressure filteration
One end of device (014) connects, and the other end of high pressure filter (014) is connected with the p mouth of reversal valve (2) by oil circuit.
7. the hydraulic control system of four-roller slag vertical grinding roller as claimed in claim 1 is it is characterised in that also include overflow valve
(15), one end of described overflow valve (15) is connected with the p mouth of reversal valve (2) and the 3rd pressure gauge (16) by oil circuit, overflow valve
(15) the other end is connected with fuel tank (22) by oil circuit.
8. the hydraulic control system of four-roller slag vertical grinding roller as claimed in claim 1 is it is characterised in that described hydraulic cylinder
(3) rod chamber one end is connected with four accumulators (17), and rodless cavity one end of hydraulic cylinder (3) is with two accumulators (17) even
Connect.
9. the hydraulic control system of four-roller slag vertical grinding roller as claimed in claim 1 is it is characterised in that described fuel tank (22)
Interior setting having heaters (18) and thermometer (20), fuel tank (22) side wall are provided with liquid level gauge (19), fuel tank (22) bottom sets
It is equipped with unloading port, unloading port is connected with the 5th ball valve (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410316878.6A CN104074817B (en) | 2014-07-04 | 2014-07-04 | Hydraulic control system of four-roller vertical slag mill grinding roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410316878.6A CN104074817B (en) | 2014-07-04 | 2014-07-04 | Hydraulic control system of four-roller vertical slag mill grinding roller |
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| Publication Number | Publication Date |
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| CN104074817A CN104074817A (en) | 2014-10-01 |
| CN104074817B true CN104074817B (en) | 2017-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410316878.6A Active CN104074817B (en) | 2014-07-04 | 2014-07-04 | Hydraulic control system of four-roller vertical slag mill grinding roller |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104944326B (en) * | 2014-10-14 | 2017-10-03 | 大峘集团有限公司 | A kind of grinding roller of vertical mill rises roller system with hydraulic pressure |
| CN105156379B (en) * | 2015-10-14 | 2017-03-08 | 东北大学 | A kind of energy-saving constant pressure oil source system and its control method |
| CN109114057A (en) * | 2018-11-08 | 2019-01-01 | 重庆神工农业装备有限责任公司 | The hopper jacking system of hydraulic control dilatation |
| CN109812470B (en) * | 2019-03-29 | 2024-01-19 | 中铁工程装备集团有限公司 | Hydraulic control system for rear matched trailer wheel pair of shield tunneling machine |
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| SU470662A1 (en) * | 1972-05-16 | 1975-05-15 | Днепропетровский Ордена Трудового Красного Знамени Горный Институт Им. Артема | Twin motor drive |
| JPH0523607A (en) * | 1991-07-24 | 1993-02-02 | Onoda Cement Co Ltd | Hydraulic circuit in pressure device of roller mill |
| JP2002130207A (en) * | 2000-10-31 | 2002-05-09 | Hitachi Ltd | Hydraulic drafting device for rolling machine |
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| CN104074817A (en) | 2014-10-01 |
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