CN108286526B - Leakless rotary blade angle hydraulic regulator - Google Patents
Leakless rotary blade angle hydraulic regulator Download PDFInfo
- Publication number
- CN108286526B CN108286526B CN201810219632.5A CN201810219632A CN108286526B CN 108286526 B CN108286526 B CN 108286526B CN 201810219632 A CN201810219632 A CN 201810219632A CN 108286526 B CN108286526 B CN 108286526B
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- oil
- hydraulic
- piston rod
- bladder
- regulator
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0055—Rotors with adjustable blades
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2270/00—Control
- F05D2270/60—Control system actuates means
- F05D2270/64—Hydraulic actuators
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
Abstract
The invention discloses a leakless rotary blade angle hydraulic regulator, which comprises a housing and a hydraulic regulator assembly, wherein the hydraulic regulator assembly comprises an oil cylinder, a hydraulic station oil tank, a piston rod and a power supply slip ring, and a bladder for wrapping the bottom of the piston rod is arranged between the piston rod of the hydraulic regulator assembly and an oil seal gland of the oil cylinder; the upper end opening of the bladder is fixed on the oil seal gland, and the lower end opening is fixed on the piston rod, so that a closed oil storage space is formed from the interior of the bladder to the oil seal gland and from the interior of the bladder to the bottom of the piston rod. The invention avoids the waste of hydraulic oil and the trouble of continuously supplementing the oil tank of the hydraulic station of the regulator, in particular to the pollution of the working environment around the regulator caused by oil throwing.
Description
Technical Field
The invention relates to a leakage-free rotary vane angle hydraulic regulator, and belongs to the technical field of vane pump working condition regulation and control.
Background
The rotary vane angle hydraulic regulator is one of the regulators used in the complete regulation of the axial flow pump, so as to change the working performance of the water pump by changing the vane angle of the water pump, and when in work, the hydraulic regulator is a rotary body which synchronously rotates at high speed on the horizontal plane integrally along with the main shaft of the motor, and the piston rod of the hydraulic regulator simultaneously moves up and down; the device has the advantages of relatively shortened rotation time of the rotating part of the regulator, small mechanical abrasion, few leakage points, namely oil throwing points, no abrasion of the contact of the sensor, more reliable operation and the like, and is well popularized and applied.
However, in actual operation, especially after long-term operation of the pump unit, the motor and the ground around the motor are oil-impregnated everywhere. The main reason is that after the piston rod is used for a long time, the outer surface of the piston rod is oil-stained or the surface of the piston rod is rusted, so that the surface is rough, and the V-shaped clamping fabric is worn; in addition, after long-time running, the sealing element with good quality can generate gaps due to serious abrasion, so that hydraulic oil is leaked between the piston rod and the V-shaped clamping fabric. Leakage of hydraulic oil not only causes waste of the hydraulic oil, but also seriously pollutes the surrounding environment, and the hydraulic oil needs to be continuously supplemented to a hydraulic station oil tank of the regulator, so that operation is troublesome. In addition, stability of the water pump blade can be influenced in the process of adjusting the angle of the water pump blade.
CN201310353519.3 discloses a built-in rotary vane angle hydraulic regulator, which is proposed by the present inventors. The regulator consists of a regulator main body, a housing and a control display system, wherein the regulator main body is fixedly arranged at the top end of a main motor shaft applied by a water pump unit, synchronously rotates along with the rotation of the main motor shaft, is in a relatively static state with the rotation parts of the water pump unit and the main motor at any time, and is arranged at the top end of a main motor shell and in an absolute static state with the main motor shell, and the angle of a water pump blade is fully automatically regulated by a Programmable Logic Controller (PLC), so that the water pump is in an efficient area operation at any time. However, this hydraulic regulator still has two leakage points: firstly, the oil seal on the piston and the oil cylinder wall leak, and secondly, the piston rod passes through the V-shaped clamping fabric to leak.
CN201711208869.5 discloses a synchronous regulator of blade angle of central internal oil supply hydraulic water pump, which comprises a hydraulic regulator body, a connecting flange, a hydraulic station oil tank, a piston and a collecting ring group, wherein the hydraulic regulator body is arranged at the middle coupling of a main motor and a water pump, the hydraulic station oil tank is arranged in the hydraulic regulator body, the piston is arranged in the hydraulic regulator body, a piston rod is arranged on the piston, the piston rod is connected with a connecting shaft rod through the connecting flange, the collecting ring group is arranged around the periphery of the middle part of the hydraulic regulator body, the synchronous rotation of the hydraulic regulator body and a motor rotor body is realized, and a rotary sealing piece is not required to be arranged independently, so that the safety of the hydraulic regulator is improved. Although the invention claims that leakage cannot occur due to rotation, the phenomenon that the outer surface of the piston rod is oil-stained or the surface of the piston rod is rusted still exists after the piston rod is used for a long time, so that the surface of the piston rod is rough, and a gap can be generated due to serious abrasion after a sealing piece between the piston rod and a piston cylinder sleeve runs for a long time, so that hydraulic oil is leaked from the piston rod to the oil seal gland through the oil seal gland.
In addition, in the prior art, the hydraulic system has the problems of internal leakage and external leakage of hydraulic oil to different degrees, and for the hydraulic system with the piston rod only moving up and down, the problem of continuous increase of the leakage amount of the hydraulic oil is usually solved by replacing a piston slip ring, a sealing ring at a V-shaped oil seal and the like when the equipment is overhauled in the end of year, and the operation method cannot thoroughly solve the problem of leakage of the hydraulic oil, but the leakage amount of the hydraulic oil is relatively less because the whole hydraulic equipment does not rotate at a high speed and also has no great influence on the surrounding working environment; the hydraulic equipment integrally rotates when the piston rod moves up and down, and particularly, the regulator which rotates at a high speed solves the problem that the leakage amount is continuously increased only when the equipment is overhauled at the end of year by replacing vulnerable parts of the equipment, so that the trouble is numerous, and the equipment is mainly oil-throwing, so that the operation management work is inconvenient.
In addition, the hydraulic regulator in the prior art has not considered recycling of leaked hydraulic oil, so that the operation cost can be reduced, and the trouble that hydraulic oil needs to be added and supplemented to the oil tank of the hydraulic station of the regulator frequently is avoided.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a leakage-free rotary vane angle hydraulic regulator with more reasonable structural design, which is an improvement on the hydraulic regulator disclosed in CN201310353519.3 so as to thoroughly solve the problems of pollution to the working environment caused by outward oil throwing of the hydraulic regulator due to leakage and the trouble of continuously supplementing oil to an oil tank of a hydraulic station of the regulator.
In order to achieve the above purpose, the invention adopts the following technical scheme: the leakage-free rotary blade angle hydraulic regulator comprises a housing and a hydraulic regulator assembly, wherein the hydraulic regulator assembly comprises an oil cylinder, a hydraulic station oil tank, a piston rod, a power supply slip ring and a bladder; the upper end opening of the bladder is fixed on the oil seal gland, and the lower end opening of the bladder is fixed on the piston rod, so that a closed oil storage space is formed from the interior of the bladder to the oil seal gland and from the interior of the bladder to the bottom of the piston rod.
Preferably, the bladder is an eccentric bladder having a center offset from the piston rod.
Preferably, a small balloon communicated with the eccentric capsule is arranged at the bottom of one side of the long diameter of the eccentric capsule, and a one-way air inlet valve is arranged at the top of the small balloon.
Preferably, the small saccule is externally connected with one end of an elongated soft oil return pipe, and the other end of the soft oil return pipe is connected with a vent pipe cover of the oil tank of the hydraulic station.
Compared with the prior art, the invention has the following beneficial effects:
1. the large saccule and the small saccule are arranged in the moving space of the oil seal gland of the hydraulic cylinder of the regulator and the piston rod end, the whole oil leakage point is wrapped to form a seal through the large saccule, so that hydraulic oil thrown out from the leakage position between the piston rod and the oil seal gland is firstly stored in the sealed large saccule, and then the centrifugal force suffered by oil drops when the whole regulator rotates along with a main motor shaft at a high speed and the saccule sucks air and extrudes the oil drops when the piston rod moves up and down, so that the hydraulic oil thrown out by the regulator flows back into an oil tank of a hydraulic station of the regulator through the small saccule and a slender flexible oil return pipe, thereby avoiding the waste of the hydraulic oil and the trouble of continuously supplementing the oil to the oil tank of the hydraulic station of the regulator, and particularly avoiding the pollution to the working environment around the regulator caused by the oil throwing;
2. for the hydraulic structure which simultaneously moves up and down pistons and rotates at high speed, the large bladder, the small bladder and the soft oil return pipe all move up and down along with the piston rod and move at high speed along with the regulator assembly, and the large bladder, the small bladder and the soft oil return pipe do not influence each other, so that the problem of leakage of hydraulic oil of the hydraulic regulator is well solved.
Drawings
FIG. 1 is a front view of the structure of the present invention
FIG. 2 is a left side view of the invention with the housing removed
FIG. 3 is a schematic view of the structure of the balloon according to the present invention
FIG. 4 is a hydraulic schematic of the present invention
Wherein, 1, a mounting seat, 2, a supporting seat, 3, an upper supporting plate, 4, a lower supporting plate, 5, a supporting rod, 6, a hydraulic station, 7, an electric appliance bracket, 8, a cantilever component, 9, a transmission shaft, 10, a displacement sensor, 11, a clamping keyboard, 12, a housing, 13, an oil cylinder, 14, a hydraulic station oil tank, 15, a piston, 16 and a piston rod, 17, a power supply slip ring, 18, an oil seal gland, 19, a V-shaped clamping fabric, 20, an eccentric saccule, 21, a small saccule, 22, a soft oil return pipe, 23, a small motor, 24, an oil pump, 25, an overflow valve, 26, a one-way valve, 27, a three-position four-way electromagnetic valve, 28, a hydraulic lock, 29, a load balancing valve, 30 and a one-way air inlet valve.
Detailed Description
The invention will now be further described with reference to the accompanying drawings. It will be clear that the invention is not limited thereby to the described embodiments. All other embodiments, which can be made by a person skilled in the art without any inventive effort, are intended to be within the scope of the present invention, based on the embodiments of the present invention. When the component is referred to as "provided with" or "mounted with" or "machined with" another component, the component and the component may be integrally formed and machined by machining methods such as chiseling, milling, or the like, or may be connected by bolts, welding, gluing, or the like. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "left", "right", "front", "rear" and the like are used herein for illustrative purposes only, and the following examples are not given to model numbers, dimensions, conditions, as in conventional methods, or as in the commercial description.
Example 1
As shown in fig. 1-3, the leakless rotary vane angle hydraulic regulator of the present invention is a built-in rotary vane angle hydraulic regulator, and comprises a housing 12 and a hydraulic regulator assembly, wherein the hydraulic regulator assembly is arranged at the top end of a main motor, and comprises a mounting seat 1, a supporting seat 2, an upper supporting plate 3, a lower supporting plate 4, a supporting rod 5, a hydraulic station 6, an electric appliance bracket 7, a cantilever assembly 8, a displacement sensor 10, an oil cylinder 13, a hydraulic station oil tank 14, a piston 15, a piston rod 16, a power supply slip ring 17, an oil seal gland 18, a V-shaped clamping fabric 19, an eccentric bladder 20, a small balloon 21, a soft oil return pipe 22 and a one-way air inlet valve 30. By mounting a flexible eccentric bladder 20 around the bottom of the piston rod 16 between the piston rod 16 of the hydraulic regulator assembly and the oil seal gland 18; the upper end opening of the flexible eccentric saccule 20 is fixed on the oil seal gland 18, the lower end opening is fixed on the piston rod 16, so that a sealed oil storage space is formed from the inside of the flexible eccentric saccule 20 to the oil seal gland 18 and from the inside to the bottom of the piston rod 16, and the problems of external leakage of hydraulic oil storage and collection and pollution to the surrounding working environment are solved; bladder 20 is designed as an eccentric bladder with the center offset from piston rod 16, a small bladder 21 communicated with eccentric bladder 20 is arranged at the bottom of one side of the long diameter of eccentric bladder 20, a unidirectional air inlet is arranged at the top of small bladder 21, one end of an elongated soft oil return pipe 22 is outwards connected at the middle upper part of one side of small bladder 21, the other end of soft oil return pipe 22 is connected with a vent pipe cover of hydraulic station oil tank 14, and the design of eccentric bladder enables hydraulic oil leaked by a regulator to fully flow into small bladder 21 under high-speed rotation of the part of the invention except housing 12.
The housing 12 of the invention consists of an upper housing and a lower housing, wherein the lower housing is fixedly arranged at the top end of a main motor housing, the upper housing and the main motor housing are in an absolute static state, the upper housing is fixedly arranged on the lower housing, an observation window is arranged on the side surface of the upper housing, an electric appliance bracket 7 is fixedly arranged on a hydraulic station oil tank 14, a blade angle display is arranged on the outer wall of the electric appliance bracket 7, the blade angle display comprises a pointer and a blade angle scale, a power supply is provided between the housing 12 in the static state and the hydraulic station 6 in the rotating state through a power supply slip ring 17, the hydraulic station 6 is fixedly arranged on the hydraulic station oil tank 14, the power supply slip ring 17 is arranged on a cantilever assembly 8, after the static part of the power supply slip ring 17 is electrified, the rotating part of the power supply slip ring supplies power to the hydraulic station, and simultaneously transmits signals of a displacement sensor 10.
The hydraulic modulator assembly of the present invention is rotating, referred to as a rotating body, while housing 12 is stationary. The piston rod 16 is arranged on the supporting seat 2, the lower supporting plate 4 is arranged at the extending end of the piston rod 16, the supporting rod 5 is arranged on the lower supporting plate 4, and the upper end of the supporting rod 5 is provided with the upper supporting plate 3.
An electric appliance bracket 7 is arranged on the hydraulic station oil tank 14, and a displacement sensor 10 is arranged on the back surface of the electric appliance bracket 7. When the piston rod 16 moves up and down, the lower supporting plate 4, the supporting rod 5 and the upper supporting plate 3 are driven to move up and down synchronously, so that the displacement sensor 10 fixed on the hydraulic station 6 is convenient to detect the displacement of the angle change of the water pump blade.
As disclosed in CN201310353519.3, the present invention further includes a control display system, where the control display system is composed of a PLC, a touch screen, a relay, a fuse, a switching power module, a circuit breaker, and a knob, where the touch screen can display the current blade angle, the main motor current, the time, and the room temperature parameters, the control system has two functions of manual control and automatic control, where the two control modes are selected by clicking a menu on the touch screen, the manual control is divided into two control modes of local control and remote control, where the local control and the remote control are switched by controlling a two-position knob on the display system box, and the angle of the pump blade can be adjusted and controlled by rotating an angle adjusting knob on the local control display box, and the remote control needs to be connected with a microcomputer of the pump station; the automatic control is to automatically adjust the blade angle through the current change of the main motor, and an emergency stop button is arranged on the control display box.
As shown in fig. 4, a small motor 23, an oil pump 24, an overflow valve 25, a one-way valve 26, a three-position four-way electromagnetic valve 27, a hydraulic lock 28 and a load balance valve 29 are arranged on the hydraulic station 6, the hydraulic station 6 controls the rotation of the small motor through an electric control system, and the electric control system is connected with the three-position four-way electromagnetic valve to control the oil pump delivery path, so that the hydraulic station 6 supplies oil to the oil cylinder 13 respectively, the piston 15 and the piston rod 16 do up and down movements, the lower supporting plate 4, the upper supporting plate 3 of the supporting rod 5, the transmission shaft 9 and the water pump blade adjusting rod are driven to do up and down movements, thereby driving the water pump blade to rotate, and driving the displacement sensor to detect the water pump blade placing angle.
The invention is specifically assembled with reference to the assembly disclosed in CN 201310353519.3. The upper end opening of the added eccentric saccule 20 is fixed on the oil seal gland 18, the lower end opening is fixed on the piston rod 16, the small saccule 21 is connected with the eccentric saccule 20, the top of the small saccule 21 is provided with a one-way air inlet valve 30, one end of a soft oil return pipe 22 is connected with the small saccule 21, and the other end of the soft oil return pipe is connected with the vent pipe cover of the hydraulic station oil tank 14, so that a sealed whole body formed by the large saccule and the small saccule which are communicated with the hydraulic station oil tank 14 only through one external soft oil return pipe 22 is formed.
When the hydraulic oil pump is not in operation, no oil pressure exists in the oil cylinder, the amount of hydraulic oil leaked between the piston rod and the V-shaped clamping fabric is relatively small, and the hydraulic oil can be collected and stored in the eccentric capsule for a long time.
Regarding how the hydraulic oil is recovered from the eccentric bladder 20 into the hydraulic station tank 14, there are several specific procedures as follows:
firstly, when a water pump unit just works and a regulator does not work, the temperature of the system rises, if hydraulic oil exists in a small balloon 21 or a soft oil return pipe 22, a sealing chamber formed by the eccentric balloon 20, the small balloon 21 and the soft oil return pipe 22 together can expand gas in the eccentric balloon 20, and the pressure of the gas in the eccentric balloon can be led into a hydraulic station oil tank 14 by air pressure; when the water pump unit works normally and the regulator does not need to work, the air pressure in the sealing chamber of the eccentric bladder 20 is balanced with the outside, and as the amount of oil leaked between the piston rod 16 and the V-shaped clamping fabric 19 increases, the air pressure in the sealing chamber of the eccentric bladder 20 increases, and the air pressure can press hydraulic oil from the eccentric bladder 20 into the small bladder 21 and flow into the hydraulic station oil tank 14 through the upper end of the flexible oil return pipe 22 externally connected with the small bladder 21.
Secondly, when the water pump unit works normally and the regulator still does not need to work, the device housing 12 is fixed, the regulator assembly rotates along with the main motor shaft, a small amount of oil leaking between the piston rod 16 and the V-shaped clamping fabric 19 is thrown on the inner wall of the eccentric bladder 20 under the action of centrifugal force, flows to the side of the inner wall with a large diameter and flows downwards, and flows into the small bladder 21 along with the increase of oil quantity, and when the oil in the small bladder 21 reaches a certain quantity, the oil can be directly pressed into the oil tank 14 of the upper hydraulic station under the action of the centrifugal force.
And thirdly, the water pump unit and the regulator work, namely when the water pump unit regulates the angle of a water pump blade, the piston 15 moves downwards, the piston rod 16 moves downwards, the sealing chamber of the eccentric saccule 20 is lengthened, the volume of the sealing chamber is increased, the air pressure is reduced, the unidirectional air inlet valve 30 at the top of the small saccule 21 is automatically opened, external air flows into the eccentric saccule 20 from the unidirectional air inlet valve 30 on the small saccule 21, when in reverse movement, the piston 15 moves upwards, the piston rod 16 moves upwards, the sealing chamber is compressed, the volume of the sealing chamber is reduced, the air pressure is increased, the unidirectional air inlet valve 30 is automatically closed, and oil in the eccentric saccule 20 and the small saccule 21 is pressed into the oil tank 14 of the hydraulic station through the upper end of the slender flexible oil return pipe 22.
Working procedure (disclosed in specific reference CN 201310353519.3):
1. the power supply is connected, the change-over switch is twisted to an upward position, the small motor rotates, so that the oil pump is driven to rotate, the oil pump supplies oil to the system, the piston and the piston rod move upwards, on one hand, the pull rod sleeve and the water pump blade adjusting push rod are driven to move upwards, so that the water pump blade is driven to rotate in the positive direction, on the other hand, the lower supporting plate, the supporting rod and the upper supporting plate are driven to move upwards, the moving amount is transmitted to the displacement sensor, the displacement sensor transmits signals to the digital display instrument, the digital display instrument displays the instant blade angle along with the moving amount, and when the blade angle reaches the setting, the internal relay of the digital display instrument is disconnected, and the indicator lamp is extinguished;
2. the change-over switch is twisted to the middle position, the alternating current contactor inside the digital display instrument is disconnected, the two ends of the three-position four-way electromagnetic valve are simultaneously powered off, and P, A, B, O in the three-position four-way electromagnetic valve is not powered on, so that the small motor also stops working, and no pressure oil exists. At this time, the oil in the lower cavity of the oil cylinder loads the pull rod due to the water moment of the water pump, so that pressure is formed, and the load balance valve and the hydraulic lock are double-insurance to prevent pressure oil from leaking, so that the piston is kept motionless;
3. the change-over switch is twisted to a downward position, the indicator lamp is on, the alternating-current contactor and the left end of the three-position four-way electromagnetic valve are powered, hydraulic oil flows from P to A through the one-way valve and flows into the upper cavity of the oil cylinder through the hydraulic lock, meanwhile, the load balance valve is opened to push the piston to move downwards, and oil in the lower cavity of the oil cylinder flows from B to O through the load balance valve and the hydraulic lock to the oil inlet box. At this moment, the piston and the piston rod move downwards, on one hand, the pull rod sleeve and the water pump blade adjusting push rod are driven to move downwards, so that the water pump blade is driven to rotate towards the negative direction, and on the other hand, the lower supporting plate, the supporting rod and the upper supporting plate are driven to move downwards, and the moving quantity is transmitted to the displacement sensor. The displacement sensor transmits signals to the digital display instrument, the digital display instrument displays the instant blade angle along with the change of the displacement, when the blade angle reaches a set value, the relay in the digital display instrument is disconnected, the indicator light is extinguished, the two ends of the three-position four-way electromagnetic valve are simultaneously powered off, and the whole adjusting stroke is finished.
In addition, the leakage-free rotary blade angle hydraulic regulator can be applied to a middle-set blade angle hydraulic regulator.
Claims (1)
1. The leakage-free rotary blade angle hydraulic regulator comprises a housing and a hydraulic regulator assembly, wherein the hydraulic regulator assembly comprises an oil cylinder, a hydraulic station oil tank, a piston rod and a power supply slip ring, and is characterized in that a bladder wrapping the bottom of the piston rod is arranged between the piston rod of the hydraulic regulator assembly and an oil seal gland of the oil cylinder; the upper end opening of the capsule is fixed on the oil seal gland, and the lower end opening of the capsule is fixed on the piston rod, so that a sealed oil storage space is formed from the interior of the capsule to the oil seal gland and from the interior of the capsule to the bottom of the piston rod; the bladder is an eccentric bladder with the center offset from the piston rod; a small saccule communicated with the eccentric saccule is arranged at the bottom of one side of the long diameter of the eccentric saccule, and a one-way air inlet valve is arranged at the top of the small saccule; the small saccule is externally connected with one end of a soft oil return pipe, and the other end of the soft oil return pipe is connected with a vent pipe cover of the oil tank of the hydraulic station.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810219632.5A CN108286526B (en) | 2018-03-16 | 2018-03-16 | Leakless rotary blade angle hydraulic regulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810219632.5A CN108286526B (en) | 2018-03-16 | 2018-03-16 | Leakless rotary blade angle hydraulic regulator |
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| Publication Number | Publication Date |
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| CN108286526A CN108286526A (en) | 2018-07-17 |
| CN108286526B true CN108286526B (en) | 2023-08-08 |
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| CN201810219632.5A Active CN108286526B (en) | 2018-03-16 | 2018-03-16 | Leakless rotary blade angle hydraulic regulator |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102829315A (en) * | 2012-08-30 | 2012-12-19 | 浙江平柴泵业有限公司 | Leakage-free energy-saving oil pump |
| CN103388588A (en) * | 2013-08-15 | 2013-11-13 | 戴宏岸 | Built-in rotary blade angle hydraulic pressure regulator |
| CN103912517A (en) * | 2014-03-24 | 2014-07-09 | 日立泵制造（无锡）有限公司 | Hydraulic all-adjusted tubular pump structure for vertical shaft |
| CN107143505A (en) * | 2017-06-20 | 2017-09-08 | 广东河海泵业机械有限公司 | A kind of in-service adjusting means of follow-up motor type mechanical water pump blade angle |
| CN207945091U (en) * | 2018-03-16 | 2018-10-09 | 戴宏岸 | No leakage rotation blade angle hydraulic pressure regulator |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2863197A1 (en) * | 2012-03-08 | 2013-09-12 | Quality Manufacturing Inc. | Touch sensitive robotic gripper |
-
2018
- 2018-03-16 CN CN201810219632.5A patent/CN108286526B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102829315A (en) * | 2012-08-30 | 2012-12-19 | 浙江平柴泵业有限公司 | Leakage-free energy-saving oil pump |
| CN103388588A (en) * | 2013-08-15 | 2013-11-13 | 戴宏岸 | Built-in rotary blade angle hydraulic pressure regulator |
| CN103912517A (en) * | 2014-03-24 | 2014-07-09 | 日立泵制造（无锡）有限公司 | Hydraulic all-adjusted tubular pump structure for vertical shaft |
| CN107143505A (en) * | 2017-06-20 | 2017-09-08 | 广东河海泵业机械有限公司 | A kind of in-service adjusting means of follow-up motor type mechanical water pump blade angle |
| CN207945091U (en) * | 2018-03-16 | 2018-10-09 | 戴宏岸 | No leakage rotation blade angle hydraulic pressure regulator |
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| CN108286526A (en) | 2018-07-17 |
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