CN209054043U - A kind of main shaft drives constant speed generation device hydraulic control system peculiar to vessel - Google Patents
A kind of main shaft drives constant speed generation device hydraulic control system peculiar to vessel Download PDFInfo
- Publication number
- CN209054043U CN209054043U CN201821413643.9U CN201821413643U CN209054043U CN 209054043 U CN209054043 U CN 209054043U CN 201821413643 U CN201821413643 U CN 201821413643U CN 209054043 U CN209054043 U CN 209054043U
- Authority
- CN
- China
- Prior art keywords
- slide valve
- oil
- pressure regulating
- regulating slide
- pressure
- Prior art date
- 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.)
- Expired - Fee Related
Links
Landscapes
- Control Of Eletrric Generators (AREA)
Abstract
The utility model discloses a kind of main shaft drives constant speed generation device hydraulic control systems peculiar to vessel, including oil pump, pressure-regulating valve, solenoid valve block at hydraulic circuit, driving spindle driving constant speed generation device is adjusted the speed, realize use of the mechanical stepless speed regulator on large torque driving equipment, the generator speed for driving Constant-Speed Unit is not changed by the speed of mainshaft peculiar to vessel and is changed, ensure the constant output of generator output voltage and frequency, it is ensured that the normal use of equipment on board.
Description
Technical field
The utility model belongs to ship shaft generator transmission technical field, specifically, the utility model relates to a kind of masters
Axis drives constant speed generation device hydraulic control system.
Background technique
With the pursuit of exhaustion and people increasingly to cleaning ambient of global non-renewable energy resources, energy-saving and emission-reduction are mankind institutes
The common theme faced.In shipbuilding industry, in order to reduce fuel consumption, using host driven axis come direct drive generator
It generates electricity, to replace dedicated power generation subsidiary engine to carry out driven generator power generation, is generated electricity very well using host power more than needed, it can be with
It realizes the effect of good energy-saving and emission-reduction, while considerable economic well-being of workers and staff can be brought.
But since host (diesel engine) is at work as the variation revolving speed of travel speed and load etc. can occur continuously
Variation, such as the usual working speed of ship's main diesel engine is between 500rpm to 1000rpm, revolving speed it is non-constant so that exchanging
Generator voltage and frequency are unstable, prevent Marine Electrical Equipment is from steady operation.
Existing host shaft generator system, in order to solve the problems, such as that generating voltage and frequency are unstable, by using
Power electronic system carries out control adjustment to voltage and frequency, enable output voltage and frequency steady operation required
In range.
Although current realize Shaft-Generator voltage and the unstable situation of frequency by power electronic system,
It is that there are certain technology limitations for existing system, as the patent document of Publication No. CN204046480U discloses one kind
It is made of boost rectifying circuit, DC bus storage capacitor, inverter circuit, sine wave filter, processor a, processor b steady
The technology of constant voltage and stable frequency realizes axle generator to the function of ship normal power supply, but due to powerful
Power electronic device is with high costs, and electronic reliability is lower relative to purely mechanic system, power electronic system energy
Transfer efficiency is also not very high.Therefore, it is necessary to a kind of low cost, high pass efficiency, the main shaft drives constant speed generations of high reliability
Device.
Utility model content
The utility model aims to solve at least one of the technical problems existing in the prior art.For this purpose, the utility model mentions
A kind of main shaft drives constant speed generation device hydraulic control system peculiar to vessel is supplied, it is therefore an objective to improve the energy conversion of Shaft-Generator
Efficiency, improves the reliability of Shaft-Generator, and the cost of shaft generator system is greatly lowered.
The above-mentioned technical purpose of the utility model has the technical scheme that
A kind of main shaft drives constant speed generation device hydraulic control system peculiar to vessel, including oil pump and connect with oil pump out of the mouth
Working connection, the working connection be equipped with main oil pressure regulating slide valve, driving pulley pressure regulating slide valve, driven pulley pressure adjust
Slide valve and definite value decompressed slide valve, the main oil pressure regulating slide valve are used to adjust the oil pressure of working connection, the driving pulley pressure tune
Section slide valve connect the oil pressure for adjusting driving pulley, the driven pulley pressure tune with driving pulley by driving pulley oil circuit
Section slide valve connect the oil pressure for adjusting driven pulley with driven pulley by driven pulley oil circuit, and the definite value decompressed slide valve is used
Auxiliary oil circuit will be transported to after oil pressure definite value decompression in working connection, the auxiliary oil circuit, which is equipped with, adjusts control main oil pressure regulating slide valve
The solenoid valve b of driving pulley pressure regulating slide valve is controlled with the solenoid valve a of driven pulley pressure regulating slide valve, adjusting.
By using above scheme, solenoid valve a acts on the pressure after adjusting after auxiliary oil circuit pressure is adjusted respectively
To the remote control mouth of main oil pressure regulating slide valve and driven pulley pressure regulating slide valve, working connection slide valve has in certain working connection pressure
It is not controlled below by solenoid valve a, the working connection pressure that can maintain the setting is constant；In the working connection pressure for being greater than the setting
More than power, main oil pressure regulating slide valve is controlled by solenoid valve a, and pressure can be adjusted, and driven pulley pressure regulating slide valve has
It by the control of solenoid valve a in entire operation pressure interval, that is, is zero in pressure and pressure reaches between design maximum
Can be adjusted by solenoid valve a, at the same driven pulley pressure control characteristic is consistent with working connection pressure control characteristic will be same
When control pressure change and pressure rises or falls with solenoid valve a, and be always maintained at working connection pressure not less than driven belt
Take turns pressure.This realizes driven pulley oil pressure with respect to main oil pressure independent control to realize accurate transmission belt clamping and speed change simultaneously
Requirement, and reduce the quantity of valve, improve system effectiveness and response performance.Solenoid valve b adjusts auxiliary oil circuit pressure
The pressure after adjusting is applied to driving pulley pressure regulating slide valve after section, so that driving pulley pressure is in zero and current working connection
It is adjusted between pressure value.
As a kind of improvement of the utility model, the main oil pressure regulating slide valve uses overflow valve, the main belt wheel load
Power regulating slide valve and driven pulley pressure regulating slide valve are all made of fixed pressure reducing valve, and the solenoid valve a and solenoid valve b are all made of ratio
Example formula solenoid valve.
As a kind of improvement of the utility model, the main oil pressure regulating slide valve overflow port is overflow by main oil pressure regulating slide valve
Cooling and lubricating oil circuit is connected after flowing the mouth that shuts off of oil circuit.
By using above scheme, for providing stabilizing solution pressure oil to cooling and lubricating system, it is ensured that main shaft drives constant speed hair
Electric installation works within the scope of reasonable temperature, while each component is adequately lubricated.
As a kind of improvement of the utility model, the mouth connection cooling and lubricating oil circuit that shuts off of the auxiliary oil circuit.
By using above scheme, for providing stabilizing solution pressure oil to cooling and lubricating system, it is ensured that main shaft drives constant speed hair
Electric installation works within the scope of reasonable temperature, while each component is adequately lubricated.
In conclusion the utility model has the following beneficial effects:
So that main shaft drives constant speed generation device realizes high power CW speed-regulating function, realizes and come using mechanical system
Reach the work of axle generator constant voltage constant frequency rate, to reduce the cost of Shaft-Generator, while improving efficiency, it is real
The effect of existing energy-saving and emission-reduction.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of main shaft drives constant speed generation device peculiar to vessel；
Fig. 2 is a kind of main shaft drives constant speed generation device hydraulic control system connection schematic diagram peculiar to vessel.
In the figure, it is marked as 1, oil pump；2, working connection；3, driven pulley pressure regulating slide valve；4, driven pulley；5, main oil
Press regulating slide valve；6, solenoid valve a；7, definite value decompressed slide valve；8, driving pulley pressure regulating slide valve；9, driving pulley；10, electric
Magnet valve b；11, driving pulley oil circuit；12, driven pulley oil circuit；13, main oil pressure regulating slide valve overflow oil circuit；14, auxiliary oil circuit；15,
Cooling and lubricating oil circuit；16, cabinet；17, input shaft；18, input flange disk；19, bearing of input shaft a；20, bearing of input shaft b；
21, input shaft drives gear；22, pulley shaft is inputted；23, input shaft driven gear；24, transmission belt；25, Bearing with wheel is inputted
a；26, Bearing with wheel b is inputted；27, output pulley axis；28, output pulley bearing a；29, output pulley bearing b；30, output shaft
Drive gear；31, output shaft；32, output shaft driven gear；33, output shaft bearing a；34, output shaft bearing b；35, method is exported
Blue disk.
Specific embodiment
Below against attached drawing, by the description of the embodiment, making to specific embodiment of the present utility model further detailed
Thin explanation, it is therefore an objective to help those skilled in the art to the design of the utility model, technical solution have it is more complete, accurate and
Deep understanding, and facilitate its implementation.
Embodiment:
As shown in Figure 1, the utility model provides a kind of main shaft drives constant speed generation device peculiar to vessel, including risen including input
Fast mechanism, stepless speed regulation, output speed reducer structure, cabinet 16 and connecting flange.
Specifically, as shown in Figure 1, input raising speed mechanism include input shaft 17, be mounted on 17 one end of input shaft for
The input flange disk 18 of ship driving host driven axis connection, the bearing of input shaft a19 and input shaft for being used to support input shaft 17
Bearing b20, the input shaft being mounted on input shaft 17 driving gear 21 and the input shaft being mounted on following input pulley shafts 22
Driven gear 23.
Stepless speed regulation includes input tape wheel assembly, output pulley assembly and transmission belt 24, and input tape wheel assembly includes
Input pulley shaft 22 and the driving pulley 9 being mounted on input pulley shaft 22, driving pulley 9 include being mounted on input pulley shaft
Axially movable input belt wheel activity bores disk, bores dish axle to movable hydraulic power for providing driving input belt wheel activity on 22
Input belt wheel piston, input pulley shaft 22 on be wholely set with input belt wheel activity cone disk relative engagement input belt wheel
Fixed cone disk, the input Bearing with wheel a25 for being used to support entire input tape wheel assembly and input Bearing with wheel b26；Output pulley
Assembly includes output pulley axis 27 and the driven pulley being mounted on output pulley axis 27 4, and driven pulley 4 includes being mounted on
Axially movable output pulley activity cone disk on output pulley axis 27, for provide driving output pulley activity bore dish axle to
The output pulley piston of movable hydraulic power, be wholely set on output pulley axis 27 disk is opposite matches with output pulley activity cone
The output pulley fixed cone disk of conjunction, the output pulley bearing a28 and output pulley bearing for being used to support entire output pulley assembly
b29。
On input belt wheel fixed cone disk and input belt wheel activity cone disk on the input pulley shaft 22 of stepless speed regulation
It is symmetrically angled to bore disk, while the angle of 24 two sides of transmission belt is identical with cone disk angle, such 24 two sides of transmission belt
Two sides cooperation on face and input belt wheel fixed cone disk and input belt wheel activity cone disk, by being mentioned into input belt wheel piston
Input belt wheel activity cone disk and transmission belt 24 are acted on for hydraulic pressure and input belt wheel fixed cone disk compresses mutually stress, due to
24 side of transmission belt and cone disc side contact have coefficient of friction, pass through after providing pressure in this way, input the power on pulley shaft 22
It has been transmitted on transmission belt 24；On output pulley fixed cone disk and output pulley activity cone disk on same output pulley axis 27
Cone disk be also it is symmetrical angled identical with the angle of 24 two sides of transmission belt, by providing liquid into output pulley piston
Pressure pressure acts on output pulley activity cone disk and transmission belt 24 and output pulley fixed cone disk compresses mutually stress, same to be driven
Power with 24 can be for delivery on output pulley axis 27；And since disk is bored in input belt wheel activity cone disk and output pulley activity
It is all that can move axially, in this way when increasing the pressure in input belt wheel piston, input belt wheel activity cone disk in this way will be pushed and be passed
Dynamic band 24 moves radially, and the engagement radius of such transmission belt 24 and input belt wheel cone disk just will increase, simultaneously because transmission belt 24
Length is constant, and outputs and inputs belt wheel axis center away from constant, and such output pulley activity cone disk will be toward making 24 He of transmission belt
The direction that the engagement radius that output pulley bores disk reduces is mobile, and the biography of driving pulley 9 and driven pulley 4 is made during this
It is dynamic to increase than continuous；It, in this way will be so that transmission belt 24 and output pulley if increasing the pressure in output pulley piston on the contrary
The engagement radius of cone disk just will increase and input the engagement radius reduction that belt wheel bores disk, so that driving pulley 9 and driven pulley 4
Transmission ratio continuously reduces.Pass through the adjusting to pressure in input belt wheel piston and output pulley piston in this way, so that it may continuous
Change the revolving speed exported on output pulley axis 27, so that revolving speed and torque that host provides realize company by stepless speed regulation
Continuous adjusting can be by the continuous change adjusting of stepless speed regulation so that output pulley when engine speed consecutive variations
Revolving speed on axis 27 is kept constant.
Output speed reducer structure includes output shaft driving gear 30, the output shaft 31, installation being mounted on output pulley axis 27
Output shaft driven gear 32 on output shaft 31, output shaft bearing a33 and output shaft bearing for supporting output shaft 31
B34 and the output flange 35 of generator amature is connected with 31 one end of output shaft is mounted on.
The power that main shaft provides transfers power to input shaft 17 by input flange disk 18, since input shaft drives gear
21 and input shaft driven gear 23 be engagement pairing transmission, and input shaft driven gear 23 again and input pulley shaft 22 connect
It connects, so power is transmitted to input pulley shaft 22 by gear, and input shaft driving gear 21 is than input shaft driven gear 23
Diameter realizes greatly liter revolving speed and reduces the function of torque, so torque obtains on the power to input pulley shaft 22 that main shaft provides
It is greatly reduced while revolving speed is significantly enhanced, so that torque reaches the need that stepless speed regulation can reasonably be born
It asks.
Output shaft is transmitted to by output pulley axis 27 by the power after stepless speed regulation continuous speed adjustment and drives gear
On 30, since output shaft driving gear 30 and output shaft driven gear 32 are that transmission, and output shaft driven tooth are matched in engagement
Wheel 32 is connected with output shaft 31 again, so power is transmitted to output shaft 31 by gear, output shaft 31 passes through output flange 23
Driven generator operating power generation drives gear 30 and the reasonable speed ratio of output shaft driven gear 32 by setting output shaft, so that
31 invariablenes turning speed of output shaft is in the revolving speed that generator needs, that is, output shaft driving gear 30 and output shaft driven gear 32
Speed ratio can be deceleration or raising speed.After the revolving speed of main shaft variation in this way is adjusted by main shaft drives constant speed generation device, it will make
Constant engine speed NE is obtained, the voltage and frequency-invariant of generator output is realized, mechanically realizes axle generator
The requirement of constant voltage and constant frequency rate greatly improves marine fuel oil utilization rate, and significantly reduce shaft generator system at
This, improves the reliability of shaft generator system.
Referring to fig. 2, complete hydraulic control system includes the following:
Working connection 2: outlet, the definite value decompressed slide valve 7, main oil pressure regulating slide valve 5, driven pulley pressure of oil pump 1 are connected to
Regulating slide valve 3, driving pulley pressure regulating slide valve 8；Definite value decompressed slide valve 7 uses fixed pressure reducing valve, and main oil pressure regulating slide valve 5 is adopted
With overflow valve, driven pulley pressure regulating slide valve 3 and driving pulley pressure regulating slide valve 8 are all made of fixed pressure reducing valve.Main oil pressure
Cooling and lubricating oil circuit is connected after the mouth that shuts off that the hydraulic oil of 5 overflow port of regulating slide valve passes through main oil pressure regulating slide valve overflow oil circuit 13
15, for providing stabilizing solution pressure oil to cooling and lubricating system, it is ensured that main shaft drives constant speed generation device works in reasonable temperature model
In enclosing, while each component is adequately lubricated.
Auxiliary oil circuit 14: the oil pressure in working connection 2 is input to according to the pressure of setting by auxiliary oil circuit by definite value decompressed slide valve 7
In 14, it is also connected with solenoid valve a6, solenoid valve b10 on auxiliary oil circuit 14 and provides stabilization to cooling and lubricating system by shutting off mouth
Hydraulic oil, solenoid valve a6 and solenoid valve b10 are all made of proportional solenoid valve, model VFS, that is, variable force
Solenoids, wherein solenoid valve a6 and solenoid valve b10 is independent control, can according to corresponding driving pulley oil circuit 11 and from
The different demands of pressure are independently adjusted in movable belt pulley oil circuit 12, meet the different demands of oil circuit pressure.
Driven pulley 4: by driven pulley oil circuit 12 that the pressure after the adjusting of driven pulley pressure regulating slide valve 3 is defeated
Enter to driven pulley 4；Driving pulley 9: will be after the adjusting of driving pulley pressure regulating slide valve 8 by driving pulley oil circuit 11
Pressure is input in driving pulley 9.
Solenoid valve a6 is respectively outputted to 5 He of main oil pressure regulating slide valve after being adjusted from the stable pressure of auxiliary oil circuit 14
The remote control mouth of driven pulley pressure regulating slide valve 3 is realized to driven pulley pressure regulating slide valve 3 and main oil pressure regulating slide valve 5
Control.In view of main oil pressure needs to provide pressure to whole system, so the minimal pressure usually in setting main oil pressure, that is, working connection 2
Power is in 4bar or so, as solenoid valve a6 controls pressure change, when the main oil pressure that main oil pressure regulating slide valve 5 exports is greater than minimum
Pressure and main oil when pressure, in driven pulley oil pressure, that is, driven pulley oil circuit 12 of the output of driven pulley pressure regulating slide valve 3
Pressure changed with same trend, driven pulley oil pressure can be set as needed it is identical with main oil pressure can also be smaller；Work as main oil pressure
When the main oil pressure that regulating slide valve 5 exports reaches minimum pressure, driven pulley oil pressure continues can by the control pressure of solenoid valve a6
To reach zero.This realize driven pulley oil pressure simultaneously with respect to main oil pressure independent control to realize accurate transmission belt 24 clamp and
The requirement of speed change, and reduce the quantity of valve, improve system effectiveness and response performance.
Solenoid valve b10 is output to driving pulley pressure regulating slide valve after being adjusted from the stable pressure of auxiliary oil circuit 14
8 remote control mouth realizes the control to driving pulley pressure regulating slide valve 8, to realize to driving pulley oil pressure, that is, driving pulley
The adjusting of the pressure of oil circuit 11 controls.It is real by being accurately controlled according to demand to driving pulley oil pressure and driven pulley oil pressure
The transmitting of efficient torque and the speed ratio consecutive variations for having showed stepless speed regulation, are also achieved that main shaft drives constant speed generation peculiar to vessel
The power generation of device driven generator constant-speed drive realizes the constant voltage constant frequency rate work of axle generator.
By above main shaft drives constant speed generation device hydraulic control system peculiar to vessel, finally make main shaft drives peculiar to vessel permanent
Fast power generator realizes high power CW speed-regulating function, realizes using mechanical system and reaches axle generator constant voltage perseverance
Frequency work, to reduce the cost of Shaft-Generator, while improving efficiency, realizes the effect of energy-saving and emission-reduction.
The utility model is exemplarily described in conjunction with attached drawing above.Obviously, the utility model implements not
It is limited by aforesaid way.As long as the various unsubstantialities that the method concept and technical solution that use the utility model carry out
Improvement；Or it is not improved, the above-mentioned conception and technical scheme of the utility model are directly applied into other occasions, at this
Within the protection scope of utility model.
Claims (4)
1. a kind of main shaft drives constant speed generation device hydraulic control system peculiar to vessel, which is characterized in that including oil pump (1) and with oil
The working connection (2) of (1) oil outlet connection is pumped, the working connection (2) is equipped with main oil pressure regulating slide valve (5), driving pulley pressure
Regulating slide valve (8), driven pulley pressure regulating slide valve (3) and definite value decompressed slide valve (7), the main oil pressure regulating slide valve (5) are used
Adjust the oil pressure of working connection (2), the driving pulley pressure regulating slide valve (8) passes through driving pulley oil circuit (11) and main belt
Wheel (9) connection is used to adjust the oil pressure of driving pulley (9), and the driven pulley pressure regulating slide valve (3) passes through driven pulley oil
Road (12) connect the oil pressure for adjusting driven pulley (4) with driven pulley (4), and the definite value decompressed slide valve (7) is used to lead
It is transported to auxiliary oil circuit (14) after oil pressure definite value decompression in oil circuit (2), the auxiliary oil circuit (14), which is equipped with, adjusts control main oil pressure tune
It saves the solenoid valve a (6) of slide valve (5) and driven pulley pressure regulating slide valve (3), adjust control driving pulley pressure regulating slide valve
(8) solenoid valve b (10).
2. a kind of main shaft drives constant speed generation device hydraulic control system peculiar to vessel according to claim 1, which is characterized in that
The main oil pressure regulating slide valve (5) uses overflow valve, and the driving pulley pressure regulating slide valve (8) and driven pulley pressure are adjusted
Slide valve (3) is all made of fixed pressure reducing valve, and the solenoid valve a (6) and solenoid valve b (10) are all made of proportional solenoid valve.
3. a kind of main shaft drives constant speed generation device hydraulic control system peculiar to vessel according to claim 2, which is characterized in that
Cooling profit is connected after the mouth that shuts off that main oil pressure regulating slide valve (5) overflow port passes through main oil pressure regulating slide valve overflow oil circuit (13)
Lubricating oil road (15).
4. a kind of main shaft drives constant speed generation device hydraulic control system peculiar to vessel according to claim 1, which is characterized in that
Mouth connection cooling and lubricating oil circuit (15) of shutting off of the auxiliary oil circuit (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821413643.9U CN209054043U (en) | 2018-08-30 | 2018-08-30 | A kind of main shaft drives constant speed generation device hydraulic control system peculiar to vessel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821413643.9U CN209054043U (en) | 2018-08-30 | 2018-08-30 | A kind of main shaft drives constant speed generation device hydraulic control system peculiar to vessel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209054043U true CN209054043U (en) | 2019-07-02 |
Family
ID=67048165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821413643.9U Expired - Fee Related CN209054043U (en) | 2018-08-30 | 2018-08-30 | A kind of main shaft drives constant speed generation device hydraulic control system peculiar to vessel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209054043U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109210167A (en) * | 2018-08-30 | 2019-01-15 | 宁波博生机电科技有限公司 | A kind of main shaft drives constant speed generation device hydraulic control system peculiar to vessel |
-
2018
- 2018-08-30 CN CN201821413643.9U patent/CN209054043U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109210167A (en) * | 2018-08-30 | 2019-01-15 | 宁波博生机电科技有限公司 | A kind of main shaft drives constant speed generation device hydraulic control system peculiar to vessel |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108757607A (en) | Mixed dynamic transmission pressure system | |
| CN110805521B (en) | Novel frequency modulation control system and control method for energy storage type hydraulic wind generating set | |
| CN209250419U (en) | A kind of mechatronics integration speed-regulating system | |
| CN209054043U (en) | A kind of main shaft drives constant speed generation device hydraulic control system peculiar to vessel | |
| CN102494128B (en) | Pump control CVT electrohydraulic control system | |
| CN102624306B (en) | Control device for an electric motor | |
| CN109210167A (en) | A kind of main shaft drives constant speed generation device hydraulic control system peculiar to vessel | |
| CN109450167A (en) | A kind of mechatronics integration speed-regulating system and its soft-start method | |
| CN109854693A (en) | Stepless speed variator system suitable for electric car | |
| CN104426445A (en) | System For Hydraulically Powered Electric Generator | |
| CN206658142U (en) | A kind of star-wheel variable speed energy saving system of closed-loop control water pump | |
| CN109595321A (en) | Pure electric vehicle stepless speed variator system | |
| CN109149861A (en) | A kind of main shaft drives constant speed generation device peculiar to vessel | |
| CN215072102U (en) | Pump rotating speed regulating and controlling system based on permanent magnet regulation | |
| US11692541B2 (en) | Electric motor pump system and method | |
| CN110332119B (en) | Automatic control system and method for starting process of screw type refrigeration compressor | |
| CN210422915U (en) | Water feeding pump system with variable-speed front pump | |
| CN208309700U (en) | A kind of centrifugal pump intelligent frequency reduction or raising frequency energy-saving control system | |
| CN202795070U (en) | Flow regulating system and flow regulating device | |
| CN202338633U (en) | Pump control hydraulic system of metal belt type continuously variable transmission | |
| CN217233722U (en) | High-rotating-speed high-power hydraulic pump direct-drive device | |
| JP4216738B2 (en) | Motor driving method and apparatus | |
| CN110001676A (en) | A kind of power concentration formula Diesel Multiple Unit power supply system of train | |
| CN104595168A (en) | Method for controlling water pump frequency conversion based on tail end constant impedance | |
| CN2313103Y (en) | Viscosity coupling-clutching speed-regulator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190702 Termination date: 20210830 |