CN108547809A - Control system and trucd mixer with it - Google Patents
Control system and trucd mixer with it Download PDFInfo
- Publication number
- CN108547809A CN108547809A CN201810581129.4A CN201810581129A CN108547809A CN 108547809 A CN108547809 A CN 108547809A CN 201810581129 A CN201810581129 A CN 201810581129A CN 108547809 A CN108547809 A CN 108547809A
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- China
- Prior art keywords
- oil pump
- control system
- motor
- controller
- oil
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
-
- 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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Abstract
The present invention provides a kind of control system and with its trucd mixer, wherein control system includes：Oil pump, there are two types of pump oil directions for tool；Motor is connected with oil pump；Buffer unit is connect with motor, and when oil pump commutates between two kinds of rotation directions, buffer unit operation, so that motor pause operating, after the completion of oil pump commutation, buffer unit is out of service, so that motor remains in operation.Technical scheme of the present invention efficiently solves the problem of easy ting produce larger compression shock when mixing drum commutating speed is very fast in the prior art, influencing the service life of parts, lead to earlier period damage failure.
Description
Technical field
The present invention relates to trucd mixer fields, in particular to a kind of control system and with its trucd mixer.
Background technology
Trucd mixer is a kind of haulage vehicle with rotatable mixing drum, commonly used in transporting concrete for building.
Mixing drum needs constantly to rotate in the transportational process of trucd mixer, to ensure that concrete will not solidify during transport.It stirs
Cylinder usually tool is mixed there are two rotation direction, operator controls turning for mixing drum by the commutation mechanical operating mechanism on trucd mixer
To.Trucd mixer on the market has the following problems at present：
Since the operating habit of operator is different, the dynamics and speed difference of different people control commutation mechanical operating mechanism,
When commutating speed is slower, mixing drum turns to steady；When commutating speed is very fast, mixing drum turns to suddenly, is easy in trucd mixer
Hydraulic system in generate larger compression shock, influence the service life of parts in system, lead to earlier period damage failure.
Invention content
The present invention is intended to provide a kind of control system and the trucd mixer with it, are commutated with solving mixing drum in the prior art
The problem of easy ting produce larger compression shock when speed, influencing the service life of parts, lead to earlier period damage failure.
To achieve the goals above, according to an aspect of the invention, there is provided a kind of control system, including：Oil pump, tool
There are two types of pump oil directions；Motor is connected with oil pump；Buffer unit is connect with motor, when oil pump changes between two kinds of rotation directions
Xiang Shi, buffer unit operation, so that motor pause operating, after the completion of oil pump commutation, buffer unit is out of service, so that motor
It remains in operation.
Further, buffer unit includes bypass circulation and identifying system, and bypass circulation is arranged in parallel with motor, identification system
The current state of the current state of system oil pump for identification, oil pump includes continuous running state or changes state in direction, when
When identifying system recognizes oil pump and is in direction and changes state, bypass circulation and oil pump directly be connecteds so that motor suspends operating.
Further, it is provided with solenoid valve on bypass circulation, to control the break-make of bypass circulation.
Further, flow valve is additionally provided on bypass circulation, flow valve is arranged in series with solenoid valve.
Further, identifying system includes position switch and the first controller, and position switch can detect whether oil pump is located
Change state in direction, the first controller is arranged between position switch and solenoid valve, when position switch detects that oil pump is in
When direction changes state, the first controller controls solenoid valve conduction.
Further, identifying system includes two pressure sensors and second controller, inlet and outlet that there are two oil pump tools, and two
A pressure sensor be separately positioned on two inlet and outlet on, second controller is electrically connected with pressure sensor and solenoid valve, when times
When the pressure value that meaning pressure sensor measures is more than preset value, second controller controls solenoid valve conduction.
Further, identifying system further includes caution device, and caution device is connected with second controller, when arbitrary pressure passes
When the pressure value that sensor measures is more than preset value, second controller sends alarm signal to caution device.
Further, caution device includes sound-producing device, and sound-producing device can send out caution sound after receiving alarm signal,
And/or caution device includes light-emitting device, light-emitting device can send out warning light after receiving alarm signal.
Further, sound-producing device is buzzer.
According to another aspect of the present invention, a kind of trucd mixer, including control system are provided, control system is above-mentioned control
System processed.
It applies the technical scheme of the present invention, buffer unit intervenes oil circuit when oil pump turns to, and makes oily preferentially by buffering dress
The cycle and pressure change for completing oil in oil pump are set, damage of the compression shock of pressure change generation to motor is reduced.Work as oil
Pump completes that commutation, the pressure stability rear buffering device of oil are out of service, and motor, which is connected into oil circuit, to be remained in operation and complete direction and change
Become.The commutation of oil pump in this way will not generate motor larger compression shock, reduce damage of the oil pressure to parts.
Description of the drawings
The accompanying drawings which form a part of this application are used to provide further understanding of the present invention, and of the invention shows
Meaning property embodiment and its explanation are not constituted improper limitations of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 shows the structural schematic diagram of the embodiment one of control system according to the present invention；And
Fig. 2 shows the structural schematic diagrams of the embodiment two of control system according to the present invention.
Wherein, above-mentioned attached drawing includes the following drawings label：
10, oil pump；11, mechanical handle；12, reversal valve；20, motor；30, buffer unit；31, solenoid valve；32, flow
Valve；33, position switch；34, the first controller；35, first pressure sensor；36, second pressure sensor；37, the second control
Device；38, buzzer；A, first import and export；B, second import and export；M1, the first pressure tap；M2, the second pressure tap；M3, third are surveyed
Pressure point；M4, the 4th pressure tap；M5, the 5th pressure tap；L1, the first drain tap；L2, the second drain tap；S, inlet port；40, it radiates
Device；50, inlet port filter；60, fuel tank.
Specific implementation mode
The control system of the application can be applied to control the steering of mixing drum in trucd mixer, and mixing drum mainly passes through
HYDRAULIC CONTROL SYSTEM, operator changes flow direction of the oil in oil pump by control commutation mechanical operating mechanism, and then controls
The steering of motor.As shown in Figure 1, the commutation mechanical operating mechanism of the present embodiment is mechanical handle 11, operator rotates manipulator
Handle 11 can touch the steering of the realization motor 20 of reversal valve 12 of oil pump 10.The reversal valve 12 of the present embodiment has partition oil circuit
Centre position, when reversal valve 12 is centrally located, oil pump 10 is not to 20 fuel feeding of motor.But when operator rotates manipulator
When the speed of handle 11, reversal valve 12 makes the effect in centre position fail in centre position residence time deficiency, and oil is in oil
Flow direction cataclysm easy tos produce larger compression shock in road.The application is regarding to the issue above to the hydraulic control system of trucd mixer
System is made that improvement.
Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of embodiments of the present application, instead of all the embodiments.Below
Description only actually at least one exemplary embodiment is illustrative, is never used as to the application and its application or makes
Any restrictions.Based on the embodiment in the application, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, shall fall in the protection scope of this application.
It should be noted that term used herein above is merely to describe specific implementation mode, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative
It is also intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or combination thereof.
Unless specifically stated otherwise, positioned opposite, the digital table of the component and step that otherwise illustrate in these embodiments
Up to the unlimited scope of the present application processed of formula and numerical value.Simultaneously, it should be appreciated that for ease of description, attached each portion shown in the drawings
The size divided not is to be drawn according to actual proportionate relationship.For technology, side known to person of ordinary skill in the relevant
Method and equipment may be not discussed in detail, but in the appropriate case, and the technology, method and apparatus should be considered as authorizing explanation
A part for book.In shown here and discussion all examples, any occurrence should be construed as merely illustrative, and
Not by way of limitation.Therefore, the other examples of exemplary embodiment can have different values.It should be noted that：Similar label
Similar terms are indicated in following attached drawing with letter, therefore, once it is defined in a certain Xiang Yi attached drawing, then subsequent attached
It need not be further discussed in figure.
Embodiment one：
As shown in Figure 1, the control system of the present embodiment includes oil pump 10, motor 20 and buffer unit 30, motor 20 and oil
Pump 10 is connected.Wherein, oil pump 10 has two kinds of pump oil directions of forward and reverse, and correspondingly, motor 20, which has, rotates and reverse two
Kind of rotating manner, when the positive pump oil of oil pump 10, first import and export A is fuel-displaced, second import and export B oil inlets, and motor 20 rotates forward；Work as oil
When pumping 10 reversed pump oil, first import and export A oil inlets, second import and export B are fuel-displaced, and motor 20 inverts.Buffer unit 30 and motor 20
Connection, when oil pump 10 turns to from forward direction reversed or when from counter steering forward direction, buffer unit 30 is run so that the pause of motor 20 is transported
Turn, after the completion of the commutation of oil pump 10, buffer unit 30 is out of service, so that the rotation direction of motor 20 changes and remains in operation.
Using the technical solution of the present embodiment, buffer unit 30 intervenes oil circuit when oil pump 10 turns to, and makes oily preferential process
Buffer unit 30 flows between first import and export A and second import and export B, realizes that cycle and pressure of the oil in oil pump 10 become
Change, reduces damage of the compression shock of pressure change generation to motor 20.It is slow after oil pump 10 completes commutation, oily pressure stability
Flushing device 30 is out of service, and motor 20, which is connected into oil circuit, remains in operation and complete direction change.The commutation of oil pump 10 in this way will not
Larger compression shock is generated to motor 20, reduces damage of the oil pressure to parts.
Buffer unit 30 includes bypass circulation and identifying system, and bypass circulation is arranged in parallel with motor 20, and identifying system is used
Include continuous running state in the current state of the current state of identification oil pump 10, oil pump 10 or changes state in direction, when
When identifying system recognizes oil pump 10 and is in direction and changes state, bypass circulation and oil pump 10 are directly connected so that the pause of motor 20
Operating.20 short circuit of motor is made oil preferentially by bypass circulation between first import and export A and second import and export B by bypass circulation
Cycle and pressure change of the oil in oil pump 10 are realized in flowing, reduce damage of the compression shock to motor 20 of pressure change generation
Wound.
As shown in Figure 1, solenoid valve 31 is provided in the present embodiment, on bypass circulation, to control the break-make of bypass circulation.
Preferably, the solenoid valve 31 of the present embodiment be normally close valve, when solenoid valve 31 it is electric when, solenoid valve 31 be connected, first import and export A and
Second import and export B is connected to by bypass circulation by 20 short circuit of motor, and oil is without motor 20.
As shown in Figure 1, it is additionally provided with flow valve 32 in the present embodiment, on bypass circulation, flow valve 32 and solenoid valve 31
It is arranged in series.Flow valve 32 can limit the flow for the unit interval flowing through the oil of bypass circulation, and specific flow value can be according to need
It sets.
Specifically, as shown in Figure 1, the identifying system of the present embodiment includes position switch 33 and the first controller 34, position
Whether switch 33 can detect oil pump 10 in direction change state, and the first controller 34 is arranged in position switch 33 and solenoid valve
Between 31, when position switch 33 detects that oil pump 10 is in direction change state, the first controller 34 control solenoid valve 31 is led
It is logical.When the rotation of mechanical handle 11 makes 12 position of reversal valve move, position switch 33 can detect oil pump 10 and change in direction
Change state and from forward direction to reversed time (or from be backwards to the positive time), 34 reading position switch 33 of the first controller
Signal and according to position switch 33 obtain commutating speed and time control solenoid valve 31 electric duration.Solenoid valve 31 it is electric after
Bypass circulation is connected into oil circuit, pressure settling time of some work oilhole of oil pump can be extended, pressure change is gentle, system
In will not form larger compression shock.After the completion of the commutation of oil pump 10, the power-off of solenoid valve 31 returns normally off, bypass circulation
Open circuit, motor 20 work normally and change rotation direction.
The obtain electric time and the flow of flow valve 32 of solenoid valve 31 can be matched according to actual conditions, to meet system
Pressure reduces compression shock.
As shown in Figure 1, the oil pump 10 of the control system of the present embodiment further includes five pressure taps (M1~M5) to monitor oil
The operating status of pump 10, machine oil enter inlet port S by inlet port filter 50, and the machine oil overflowed in oil pump 10 is let out by first
Hydraulic fluid port L1 and the second drain tap L2 are back in fuel tank 60.Radiator 40 is additionally provided in the control system of the present embodiment.
Embodiment two：
The control system of the present embodiment uses another way identification oil pump 10 whether in direction change state, specifically
Ground, as shown in Fig. 2, the identifying system of the present embodiment includes two pressure sensors (first pressure sensor 35 and second pressures
Sensor 36) and second controller 37, first pressure sensor 35 be separately positioned on first import and export A, second pressure sensing
Device 36 is separately positioned on second import and export B, second controller 37 and first pressure sensor 35, second pressure sensor 36 and
Solenoid valve 31 is electrically connected, when any one pressure sensor measures in first pressure sensor 35 and second pressure sensor 36
When pressure value is more than preset value, second controller 37 controls solenoid valve 31 and is connected.
The pressure etc. that above-mentioned preset value can bear according to each part in flow velocity oily in pipeline, pressure and system
Factor design, which calculates, to be obtained.When the pressure value that arbitrary pressure sensor measures is more than preset value, this means that oil is in pipeline
Produce the compression shock for capableing of part of damage.Solenoid valve 31 is connected at this time, the preferential flow direction of the oil in oil pump 10 is made to bypass back
Road makes the pause operating of motor 20 to bypass motor 20, reduces the compression shock having to motor 20, play the work of protection motor 20
With.
As shown in Fig. 2, the identifying system of the present embodiment further includes caution device, caution device and 37 phase of second controller
Even, when the pressure value that arbitrary pressure sensor measures is more than preset value, second controller 37 sends warning letter to caution device
Number.Alarm signal reminds excessive velocities when operator's manipulator's handle 11, and operator is promoted to slow down turning velocity, Jin Ershi
The purpose of existing standard operation.
Specifically, as shown in Fig. 2, the caution device of the present embodiment includes buzzer 38, buzzer 38 receives warning letter
Caution sound can be sent out after number, buzzer 38 is used as sound-producing device, and mechanical handle 11 is rotated by sound, audible prompts operator
Excessive velocities, be easy motor 20 or oil pump 10 are caused to damage, do not meet working specification.To supervise operator to slow down rotation
The speed of mechanical handle 11.In other embodiments, caution device can also include light-emitting device, correspondingly, light-emitting device
Warning light can be sent out after receiving alarm signal, passes through visual alerts operator's standard operation.
Present invention also provides a kind of trucd mixers, include control according to the embodiment of the trucd mixer (not shown) of the application
System processed, control system are the control system comprising part above structure component or entire infrastructure component.The stirring of the present embodiment
The mixing drum of vehicle will not generate hydraulic system larger pressure oscillation when being converted between rotating and reverse, and can ensure hydraulic pressure
Parts service life, make trucd mixer it is stable, reduce damage parts.
It can be seen from the above description that the above embodiments of the present invention realize following technique effect：
Buffer unit intervenes oil circuit when oil pump turns to, make it is oily preferentially by buffer unit first import and export and second into
It is flowed between outlet, realizes cycle and pressure change of the oil in oil pump, reduce the compression shock of pressure change generation to motor
Damage.When oil pump completion commutation, the pressure stability rear buffering device of oil are out of service, motor, which is connected into oil circuit, to remain in operation simultaneously
Direction is completed to change.The commutation of oil pump in this way will not generate motor larger compression shock, reduce damage of the oil pressure to parts
It is bad.
In the description of the present application, it is to be understood that the noun of locality such as " front, rear, top, and bottom, left and right ", " laterally, vertical,
Vertically, the orientation or positional relationship indicated by level " and " top, bottom " etc. is normally based on orientation or position shown in the drawings and closes
System is merely for convenience of description the application and simplifies to describe, and in the absence of explanation to the contrary, these nouns of locality do not indicate that
Signified device or element must have a particular orientation or with specific azimuth configuration and operations with hint, therefore cannot manage
Solution is the limitation to the application protection domain；The noun of locality " inside and outside " refers to inside and outside the profile relative to each component itself.
For ease of description, herein can with use space relative terms, as " ... on ", " in ... top ",
" ... upper surface ", " above " etc., for describing such as a device shown in the figure or feature and other devices or spy
The spatial relation of sign.It should be understood that spatially relative term is intended to comprising the orientation in addition to device described in figure
Except different direction in use or operation.For example, if the device in attached drawing is squeezed, it is described as " in other devices
It will be positioned as " under other devices or construction after part or construction top " or the device of " on other devices or construction "
Side " or " under other devices or construction ".Thus, exemplary term " ... top " may include " ... top " and
" in ... lower section " two kinds of orientation.The device can also other different modes positioning (rotation 80 degree or in other orientation), and
And respective explanations are made to the opposite description in space used herein above.
Furthermore, it is necessary to which explanation, limits parts, it is only for be convenient for using the words such as " first ", " second "
Corresponding parts are distinguished, do not have Stated otherwise such as, there is no particular meanings for above-mentioned word, therefore should not be understood as to this
Apply for the limitation of protection domain.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of control system, which is characterized in that including：
Oil pump (10), there are two types of pump oil directions for tool；
Motor (20) is connected with the oil pump (10)；
Buffer unit (30) is connect with the motor (20), when the oil pump (10) commutates between two kinds of rotation directions, institute
Buffer unit (30) operation is stated, so that the motor (20) pause operating, after the completion of the oil pump (10) commutation, the buffering
Device (30) is out of service, so that the motor (20) remains in operation.
2. control system according to claim 1, which is characterized in that the buffer unit (30) includes bypass circulation and knowledge
Other system, the bypass circulation are arranged in parallel with the motor (20), the identifying system oil pump (10) for identification
The current state of current state, the oil pump (10) includes continuous running state or changes state in direction, when the identification
When system identification is in direction change state to the oil pump (10), the bypass circulation is directly led with the oil pump (10)
Passing to makes the motor (20) pause operating.
3. control system according to claim 2, which is characterized in that solenoid valve (31) is provided on the bypass circulation,
To control the break-make of the bypass circulation.
4. control system according to claim 3, which is characterized in that be additionally provided with flow valve on the bypass circulation
(32), the flow valve (32) is arranged in series with the solenoid valve (31).
5. control system according to claim 3, which is characterized in that the identifying system includes position switch (33) and
Whether one controller (34), the position switch (33) can detect the oil pump (10) in direction change state, institute
It states the first controller (34) to be arranged between the position switch (33) and the solenoid valve (31), when the position switch (33)
When detecting that the oil pump (10) is in direction change state, first controller (34) controls the solenoid valve (31)
Conducting.
6. control system according to claim 3, which is characterized in that the identifying system include two pressure sensors and
Second controller (37), for oil pump (10) tool there are two inlet and outlet, two pressure sensors are separately positioned on two institutes
It states in inlet and outlet, the second controller (37) is electrically connected with the pressure sensor and the solenoid valve (31), when arbitrary institute
When stating pressure value that pressure sensor measures and being more than preset value, the second controller (37) controls the solenoid valve (31) and leads
It is logical.
7. control system according to claim 6, which is characterized in that the identifying system further includes caution device, described
Caution device is connected with the second controller (37), when the pressure value that the arbitrary pressure sensor measures is more than preset value
When, the second controller (37) sends alarm signal to the caution device.
8. control system according to claim 7, which is characterized in that the caution device includes sound-producing device, the hair
Acoustic device can send out caution sound after receiving the alarm signal, and/or, the caution device includes light-emitting device, described
Light-emitting device can send out warning light after receiving the alarm signal.
9. control system according to claim 8, which is characterized in that the sound-producing device is buzzer (38).
10. a kind of trucd mixer, including control system, which is characterized in that the control system is any one of claim 1 to 9
The control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810581129.4A CN108547809A (en) | 2018-06-07 | 2018-06-07 | Control system and trucd mixer with it |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810581129.4A CN108547809A (en) | 2018-06-07 | 2018-06-07 | Control system and trucd mixer with it |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108547809A true CN108547809A (en) | 2018-09-18 |
Family
ID=63492634
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810581129.4A Pending CN108547809A (en) | 2018-06-07 | 2018-06-07 | Control system and trucd mixer with it |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108547809A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111347561A (en) * | 2020-04-16 | 2020-06-30 | 胡武刚 | Movable mixer |
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| CN201363332Y (en) * | 2009-03-05 | 2009-12-16 | 中国矿业大学 | Large inertia variable frequency volume bypass throttling speed governing system |
| CN102797728A (en) * | 2011-12-29 | 2012-11-28 | 南京工程学院 | Variable flywheel-based energy-saving hydraulic vibration system and working mode thereof |
| CN102865262A (en) * | 2012-09-07 | 2013-01-09 | 三一重工股份有限公司 | Rotary hydraulic system and engineering machine |
| CN202789863U (en) * | 2012-08-20 | 2013-03-13 | 烟台杰瑞石油装备技术有限公司 | System for pipe line washing and hydraulic oil self-circulation heating of hydraulic system |
| CN103644171A (en) * | 2013-12-09 | 2014-03-19 | 中联重科股份有限公司 | Hydraulic motor locked-rotor prevention control system and method and engineering machine |
| CN206320090U (en) * | 2016-11-16 | 2017-07-11 | 长沙黑金刚实业有限公司 | A kind of control device of high-speed hydraulic motor |
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2018
- 2018-06-07 CN CN201810581129.4A patent/CN108547809A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85100434A (en) * | 1985-04-04 | 1986-10-01 | 险峰机床厂 | Power self-adapting non-pulse variable shifting reciprocal hydraulic press system |
| CN201363332Y (en) * | 2009-03-05 | 2009-12-16 | 中国矿业大学 | Large inertia variable frequency volume bypass throttling speed governing system |
| CN102797728A (en) * | 2011-12-29 | 2012-11-28 | 南京工程学院 | Variable flywheel-based energy-saving hydraulic vibration system and working mode thereof |
| CN202789863U (en) * | 2012-08-20 | 2013-03-13 | 烟台杰瑞石油装备技术有限公司 | System for pipe line washing and hydraulic oil self-circulation heating of hydraulic system |
| CN102865262A (en) * | 2012-09-07 | 2013-01-09 | 三一重工股份有限公司 | Rotary hydraulic system and engineering machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111347561A (en) * | 2020-04-16 | 2020-06-30 | 胡武刚 | Movable mixer |
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