CN203146319U - Vehicle hydraulic vane pump motor and switching control hydraulic system thereof - Google Patents
Vehicle hydraulic vane pump motor and switching control hydraulic system thereof Download PDFInfo
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- CN203146319U CN203146319U CN 201220629082 CN201220629082U CN203146319U CN 203146319 U CN203146319 U CN 203146319U CN 201220629082 CN201220629082 CN 201220629082 CN 201220629082 U CN201220629082 U CN 201220629082U CN 203146319 U CN203146319 U CN 203146319U
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Abstract
The utility model relates to a vehicle hydraulic vane pump motor and switching control hydraulic system thereof, including a rear pump cover, an oil feeding plate, a stator, a rotor, an oil distributing plate, a front pump cover, shafts, blades, an oil inlet and an oil outlet, wherein the circumference of the rotor is provided with a plurality of blade grooves in equal angle, and the blade grooves penetrate two ends of the rotor and the side wall are provided with a hydrostatic oil chamber, and the hydrostatic oil chamber are communicated with an external hydraulic source through a signal oil channel; the hydrostatic oil chamber are groove-shaped, the opening of which are opposite to the body of the blade when the blade extends to the minimum or maximum position; the blade root is provided with a blade root oil cavity that provides hydraulic pressure for actuating the blade extend out, and an external switching control hydraulic system provides hydraulic oil for the blade root oil cavity. The switching system includes an accumulator, a three-position electromagnetic reversing valve and a reversing valve; one oil port of the output end of the reversing valve is connected to and communicated with the hydrostatic oil chamber, and the other oil port is connected with the oil cavity of blade root, and the oil port of the input end is connected to the signal oil and the accessed oil duct is provided with an one-way valve; oil ports of the output end of the three-position electromagnetic reversing valve are respectively connected to the oil inlet and the oil outlet, and the oil ports of the input end are respectively connected to an oil tank and the accumulator.
Description
Technical field
The utility model relates to a kind of oil hydraulic pump, especially relates to a kind of automobile-used hydraulic vane pump motor and switching controls hydraulic system thereof.
Background technique
For vehicle braking kinetic-energy regeneration, generally be to adopt the pump motor on the vehicle, during kinetic force when utilizing vehicle brake or slowing down, the pump motor is made pump and is used, and high pressure oil is squeezed in the accumulator, and kinetic force is converted into hydraulic pressure can store; When vehicle in starting or when accelerating, the pump motor just is used as motor and is used, and with the rotation of the high pressure oil drive motor in the accumulator, drives starting and the acceleration of vehicle, and the oil consumption of vehicle and toxic emission are reduced; And when vehicle when at the uniform velocity travelling, the pump motor is not need work, as long as because there is fluid circulation that the loss of energy is just arranged, if this pump motor is in running order for a long time, not only can not be energy-conservation, energy consumption is increased.For example be called " vehicle braking kinetic-energy regeneration device " (publication No.: CN101337499), its principle is: first break and slippage pump are separately positioned on the two ends of first driven axle, second break and hydraulic pump motor are separately positioned on the two ends of second driven axle, control oil circuit oil hydraulic pump is installed in the middle part of second driven axle, electro-hydraulic reversing valve is connected with high-pressure hydraulic accumulator, and central control unit is connected with electro-hydraulic reversing valve with break, second break, hydraulic pump motor control unit respectively.This invention can be when car brakeing, reclaim the Brake Energy of vehicle, but complex structure, control difficulty bigger, one of reason that causes this situation is that the pump motor configuration that adopts is comparatively complicated, switching between pump and the motor two states is difficult for controlling, it two is when normal vehicle operation, must disconnect and the automobile brake axle between be in transmission connection.
Summary of the invention
The utility model main purpose provides a kind of automobile-used hydraulic vane pump motor, and it adopts drive vane to stretch out with structure realization pump and the motor operations state of withdrawal and changes, and is simple in structure, switches reliable.
Another purpose of the utility model provides a kind of switching controls hydraulic system of automobile-used hydraulic vane pump motor, its system architecture is simple, be easy to control the state switching of hydraulic vane pump motor, make the pump motor when car brakeing, absorb energy, release energy, do not work when normally moving when starting.
Above-mentioned technical problem of the present utility model is mainly solved by following technical proposals: automobile-used hydraulic vane pump motor, it comprises rear pump cover, oil-feed oil distribution casing, stator, rotor, fuel-displaced oil distribution casing, front pump cover, axle, blade, filler opening and oil outlet, it is characterized in that: equal angles is arranged with several blade grooves on the described rotor circumference, blade groove connects two ends of rotor and offers the static pressure oil-in chamber at its sidewall, and the static pressure oil-in chamber is communicated with external hydraulic source by the signal oil passage; This static pressure oil-in chamber is the groove shape of enlarging, and when blade reached maximum position and minimum position, the opening of static pressure oil-in chamber was all over against the body of blade; Described root of blade be provided with can provide that the hydraulic coupling actuator blade stretches out the root of blade oil pocket, the root of blade oil pocket provides hydraulic oil by the switching controls hydraulic system of outside.When vehicle vehicle brake or when slowing down in the process of moving, filler opening connected tank, oil outlet connect accumulator, kinetic force with brake drives hydraulic pump works, static pressure oil-in chamber connected tank at this moment, and signal oil charges into the root of blade oil pocket, blade is applied ejecting force, blade is subjected to action of centrifugal force protruding simultaneously, and blade is fitted with stator under double action, makes the utility model make pump and uses, high pressure oil is squeezed in the accumulator, and kinetic force is converted into hydraulic pressure can store.When vehicle in starting or when accelerating, filler opening connects accumulator, oil outlet connected tank, at this moment static pressure oil-in chamber connected tank, the root of blade oil pocket charges into hydraulic oil, hydraulic coupling ejects blade, and the utility model just is used as motor and is used, with the rotation of the high pressure oil drive motor in the accumulator, drive starting and the acceleration of vehicle, the oil consumption of vehicle and discharging are reduced.When vehicle is not need work when at the uniform velocity travelling, as long as because there is fluid to circulate the loss of energy is just arranged, if this pump motor is in running order for a long time, not only can not be energy-conservation, energy consumption is increased, this moment root of blade oil pocket connected tank, the static pressure oil-in chamber charges into hydraulic oil; The hydraulic coupling of static pressure oil-in chamber makes friction increase between blade and the sidewall, the blade that blade has stretched out in the rotor rotation process can be pushed back the minor axis position along the stator inner curve, blade after pushing back then again can not overcome friction and throw away, make blade all be in retracted mode, though this moment axle is rotating, delivering oil and enter off position no longer.The structure that this drive vane is stretched out and withdrawn is switched reliably, and is simple in structure, is convenient to make, and is convenient to simplify outside switching controls hydraulic system, and whole cost is lower.
For the structure that adopts the hydraulic coupling actuator blade to stretch out, as preferably, the root of blade oil pocket is located at the root of blade, and cavity is bar shaped, be arranged in parallel with blade; The cavity of root of blade oil pocket has at least an end to run through the sidewall of rotor and is communicated with the switching controls hydraulic system.This structure takes full advantage of the root basal area of blade as far as possible, makes the blade bottom surface all touch fluid in the root of blade oil pocket, the ejecting force that increases blade.
As preferably, the static pressure oil-in chamber is the long strip groove, and the groove two ends equate with the distance of the rotor sidewall of respective side.Both can increase in the static pressure oil-in chamber area of contact between the fluid and blade, and can avoid static pressure oil-in chamber notch to exceed the stroke of blade again and cause pressure to lose efficacy.
As preferably, the signal oil passage is three stage structure, first section be on the rotor, the stage casing is in fuel-displaced oil distribution casing or the oil-feed oil distribution casing on, rear is on rear pump cover or the front pump cover; The first section connecting part with the stage casing, the first section opening with the stage casing has at least one to be circular groove, and the notch of circular groove is respectively over against the opening of another section, and the circular groove center of circle is concentric with rotor.This structure when rotor rotates, also can keep effective connection of oil duct, and not reduce circulation area.
As preferably, between switching controls hydraulic system and the root of blade oil pocket oil supply gallery is set, this oil supply gallery is the two-part structure, and first section is on fuel-displaced oil distribution casing or the oil-feed oil distribution casing, and rear is on rear pump cover or the front pump cover; An end opening of first section is circular groove, and the circular groove center of circle is concentric with rotor, and the notch of circular groove is over against the connection hydraulic fluid port of root of blade oil pocket.This structure when rotor rotates, also can keep effective connection of oil duct, and not reduce circulation area.
The switching controls hydraulic system of a kind of automobile-used hydraulic vane pump motor of the utility model, it comprises the control valve of accumulator, selector valve and changeable accumulator entrance oil circuit; When the pump motor was in the pump state, accumulator communicated with pump discharge by control valve; When the pump motor was in the motor state, accumulator communicated with motor inlet by control valve; Selector valve output terminal one hydraulic fluid port connects the static pressure oil-in chamber, another hydraulic fluid port connects the root of blade oil pocket, and the input end hydraulic fluid port inserts signal oil, and at the oil duct that inserts one-way valve is set; The hydraulic fluid port of the output terminal of control valve inserts filler opening, oil outlet respectively, and the hydraulic fluid port of input end inserts fuel tank and accumulator respectively.Control valve is the three-position electromagnetic selector valve, perhaps the combination brake switch and proporting that is combined by some one-way valves or other valves.Based on alternative consideration, selector valve also can be the combination brake switch and proporting that some one-way valves combine.When vehicle vehicle brake or when slowing down in the process of moving, at this moment static pressure oil-in chamber connected tank, signal oil enters the root of blade oil pocket, blade is applied ejecting force, blade is subjected to action of centrifugal force protruding simultaneously, and blade is fitted with stator under double action, makes the utility model make pump and uses, high pressure oil is squeezed in the accumulator, and kinetic force is converted into hydraulic pressure can store.When vehicle in starting or when accelerating, the three-position electromagnetic selector valve switches to 3, make accumulator connect filler opening, static pressure oil-in chamber connected tank, synchronous signal oil enters the root of blade oil pocket, and hydraulic coupling ejects blade, and the utility model just is used as motor and is used, with the rotation of the high pressure oil drive motor in the accumulator, drive starting and the acceleration of vehicle.When vehicle when at the uniform velocity travelling, the three-position electromagnetic selector valve switches to namely 2 of metas, selector valve also switches simultaneously, make root of blade oil pocket connected tank, signal oil charges into the static pressure oil-in chamber, and its hydraulic coupling has increased the frictional force between blade and the blade groove, no longer stretches out after making the blades retracted blade groove.This system architecture, simple in structure, the state switching of hydraulic vane pump motor is easy to control.When especially vehicle normally moves, with respect to the existing mechanically operated structure that needs between disconnecting external and the pump motor drive shaft, native system only needs can enter the state that absorbs energy or release energy by drive vane is flexible, speed of response is fast, make the pump motor when car brakeing, absorb energy, release energy, do not work when normally moving three kinds of state conversions when starting fast, be beneficial to the efficient that strengthens endergonic efficient, releases energy, when vehicle normally moves, also do not increase extra load and cause the energy loss of vehicle power.
In order to increase the active force that ejects blade, as preferably, when the actuating system of blade adopts the root of blade oil pocket, branch road is set to be communicated with the root of blade oil pocket on the oil circuit between filler opening, oil outlet and the three-position electromagnetic selector valve, on this branch road one-way valve is set.When the signal oil oil pressure was not enough, the oil of pump discharge or accumulator can enter the root of blade oil pocket by one-way valve, blade is effectively stretched out put in place, with the raising speed of response, and avoided volumetric efficiency to reduce.
In sum, the automobile-used hydraulic vane pump motor of the utility model adopts drive vane to stretch out and the structure of withdrawing, and is easy to realize that pump and motor operations state switch, and blade control has higher switching reliability flexibly.Adopt the structure of stretching out of hydraulic coupling drive vane, simple in structure, be convenient to make, be convenient to simplify outside switching controls hydraulic system, make whole cost lower.
The switching controls hydraulic system of the automobile-used hydraulic vane pump motor of the utility model, its system architecture is simple, switches reliable; In vehicle launch or acceleration, at the uniform velocity travel, brake three kinds of states, system has higher corresponding speed, the efficient that be beneficial to the endergonic efficient of enhancing system, releases energy.The mode that the oil of employing pump discharge or accumulator can enter the root of blade oil pocket by one-way valve further improves the speed of response that blade stretches out, and avoids volumetric efficiency to reduce effectively.
Description of drawings
Accompanying drawing 1 is a kind of structural representation of the automobile-used hydraulic vane pump motor of the utility model;
Accompanying drawing 2 is A-A sectional views of accompanying drawing 1;
Accompanying drawing 3 is a kind of structural representations of rotor;
Accompanying drawing 4 is sectional views of rotor;
Accompanying drawing 5 is hydraulic schematic diagrams of the utility model switching controls hydraulic system.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment 1: automobile-used hydraulic vane pump motor, shown in accompanying drawing 1, accompanying drawing 2, accompanying drawing 3, accompanying drawing 4, accompanying drawing 5, it comprises rear pump cover 1, oil-feed oil distribution casing 2, stator 4, rotor 6, fuel-displaced oil distribution casing 7, front pump cover 8, axle 9, blade 11, filler opening 19 and oil outlet 18.
Equal angles is arranged with several blade grooves on rotor 6 circumference, and blade groove connects rotor 6 two ends, and the blade groove sidewall on its rotor 6 offers static pressure oil-in chamber 5, and static pressure oil-in chamber 5 is communicated with external hydraulic source by the signal oil path 10; This static pressure oil-in chamber 5 is the groove shape, and when blade 11 reached maximum position and minimum position, the opening of static pressure oil-in chamber 5 was all over against the body of blade 11.Static pressure oil-in chamber 5 is the long strip groove, and the groove two ends equate with the distance of rotor 6 sidewalls of respective side.
The signal oil path 10 is three stage structure, first section be on the rotor 6, the stage casing is on fuel-displaced oil distribution casing 7 or the oil-feed oil distribution casing 2, rear is on rear pump cover 1 or the front pump cover 8; The first section connecting part with the stage casing, the first section opening with the stage casing has at least one to be circular groove, and the notch of circular groove is over against the opening of another section, and the center of circle of circular groove is concentric with rotor 6.
The root of blade oil pocket 21 that can provide the hydraulic coupling actuator blade to stretch out is provided blade 11 root roots.Root of blade oil pocket 21 provides hydraulic oil by the switching controls hydraulic system of outside, and the independent jack-up blade of its hydraulic coupling makes it to stretch out, or cooperates centrifugal force jack-up blade to make it to stretch out.
Root of blade oil pocket 21 is located at the root of blade 11, and cavity is bar shaped, be arranged in parallel with blade 11; The cavity of root of blade oil pocket 21 has at least an end to run through the sidewall of rotor 6 and is communicated with the switching controls hydraulic system.
Embodiment 2: the switching controls hydraulic system of automobile-used hydraulic vane pump motor, as shown in Figure 5, it comprises accumulator 43, control valve 42 and selector valve 41.Control valve 42 can be three position directional valve; the perhaps combination brake switch and proporting that is combined by some one-way valves or other valves; to those skilled in the art; obviously be appreciated that; combination brake switch and proporting can be by many assembled schemes; but substitute with different combination brake switch and proporting, under the situation of same realization the utility model principle, still belong to protection domain of the present utility model.
As shown in Figure 5, when the actuating system of blade 11 adopts root of blade oil pocket 21, between filler opening 19, oil outlet 18 and the three-position electromagnetic selector valve 42 oil circuit branch road is set to be communicated with root of blade oil pocket 21, on this branch road one-way valve is set.The oil of pump discharge or accumulator can enter the root of blade oil pocket by one-way valve, to guarantee to eject blade; When signal oil occur underpressure, signal oil build press insufficient (for example, because of vehicle from the uniform speed motion state switch to braking or the switch speed of acceleration mode very fast, and the problem that the signal oil speed of response does not catch up with appears) time, can cause the not enough problem of blade ejecting force, at this moment, adopt this programme can in time replenish hydraulic oil and enter oil pocket jack-up blade.
The automobile-used hydraulic vane pump motor of the utility model, its basic principle are at root of blade the hydraulic coupling drive vane to be set to stretch out, and arrange can not stretch out after static pressure oil-in chamber 5 makes blades retracted, thereby realize that pump and motor operations state switch.
The switching controls hydraulic system of the automobile-used hydraulic vane pump motor of the utility model, its basic principle is static pressure oil-in chamber 5 and the root of blade oil pocket 21 of control pump motor inside, thereby change the working state of pump motor, to utilize accumulator stored energy and releasing energy, make system at vehicle launch or when accelerating to vehicle accelerate, when at the uniform velocity travelling the pump motor do not work, energy storage when braking.
The automobile-used hydraulic vane pump motor of the utility model and switching controls hydraulic system thereof, when vehicle vehicle brake or when slowing down in the process of moving, kinetic force with brake drives hydraulic pump works, at this moment the pump motor is done the pump use, pump is in normal working state, pump is squeezed into high pressure oil in the accumulator, and kinetic force is converted into hydraulic pressure can store.When vehicle in starting or when accelerating, the pump motor just is used as motor and is used, and with the rotation of the high pressure oil drive motor in the accumulator, drives starting and the acceleration of vehicle, and the oil consumption of vehicle and discharging are reduced.When vehicle when at the uniform velocity travelling, the pump motor is not need work, as long as because there is fluid circulation that the loss of energy is just arranged, if this pump motor is in running order for a long time, not only can not be energy-conservation, energy consumption is increased.Concrete working procedure is as follows:
1, when vehicle vehicle brake or when slowing down in the process of moving, filler opening connected tank, oil outlet connect accumulator, static pressure oil-in chamber connected tank, signal oil enters the root of blade oil pocket, and blade is applied ejecting force, blade is subjected to action of centrifugal force protruding simultaneously, blade is fitted with stator under the effect of double reaction plus, makes the utility model make pump and uses, with the kinetic force driving hydraulic pump works of brake, high pressure oil is squeezed in the accumulator, and kinetic force is converted into hydraulic pressure can store.
2, when vehicle in starting or when accelerating, the three-position electromagnetic selector valve switches to 3, make filler opening connect accumulator, oil outlet connected tank, static pressure oil-in chamber connected tank, synchronous signal oil enters the root of blade oil pocket, and hydraulic coupling ejects blade, the utility model just is used as motor and is used, with the rotation of the high pressure oil drive motor in the accumulator, drive starting and the acceleration of vehicle, can be converted into kinetic force to hydraulic pressure.
3, when vehicle when at the uniform velocity travelling, the three-position electromagnetic selector valve switches to namely 2 of metas, cuts off the oil circuit of filler opening, oil outlet, selector valve 41 also switches simultaneously, makes root of blade oil pocket connected tank, signal oil charges into the static pressure oil-in chamber; At this moment, the root of blade oil pocket does not have pressure, the logical oil of static pressure oil-in chamber, the hydraulic coupling of static pressure oil-in chamber increases the friction between blade and the blade groove sidewall, the blade that blade has stretched out in the rotor rotation process can be pushed back the minor axis position along the stator inner curve, and the blade after pushing back then again can not overcome friction and throw away, and makes blade all be in retracted mode, though this moment, axle rotated, the utility model still enters off position.
Claims (7)
1. automobile-used hydraulic vane pump motor, comprise rear pump cover (1), oil-feed oil distribution casing (2), stator (4), rotor (6), fuel-displaced oil distribution casing (7), front pump cover (8), axle (9), blade (11), filler opening (19) and oil outlet (18), it is characterized in that: equal angles is arranged with several blade grooves on described rotor (6) circumference, blade groove connects rotor (6) two ends and offers static pressure oil-in chamber (5) at its sidewall, and static pressure oil-in chamber (5) is communicated with external hydraulic source by signal oil passage (10); This static pressure oil-in chamber (5) is the groove shape, and when blade (11) reached maximum position and minimum position, the opening of static pressure oil-in chamber (5) was all over against the body of blade (11); The root of blade oil pocket (21) that can provide the hydraulic coupling actuator blade to stretch out is provided described blade (11) root, and root of blade oil pocket (21) is connected with the switching controls hydraulic system of outside.
2. automobile-used hydraulic vane pump motor according to claim 1, it is characterized in that: root of blade oil pocket (21) is located at the root of blade (11), and cavity is bar shaped, be arranged in parallel with blade (11); The cavity of root of blade oil pocket (21) has at least an end to run through the sidewall of rotor (6) and is communicated with the switching controls hydraulic system.
3. automobile-used hydraulic vane pump motor according to claim 1 is characterized in that: static pressure oil-in chamber (5) is the long strip groove, and the groove two ends equate with the distance of rotor (6) sidewall of respective side.
4. automobile-used hydraulic vane pump motor according to claim 3, it is characterized in that: signal oil passage (10) is three stage structure, and first section is in that rotor (6) is gone up, the stage casing is in fuel-displaced oil distribution casing (7) or oil-feed oil distribution casing (2) is gone up, rear is on rear pump cover (1) or the front pump cover (8); The first section connecting part with the stage casing, the first section opening with the stage casing has at least one to be circular groove, and the notch of circular groove is over against the opening of another section, and the center of circle of circular groove is concentric with rotor (6).
5. according to claim 1 or 2 or 3 or 4 described automobile-used hydraulic vane pump motors, it is characterized in that: between switching controls hydraulic system and the root of blade oil pocket (21) oil supply gallery (3) is set, this oil supply gallery (3) is the two-part structure, first section is on fuel-displaced oil distribution casing (7) or the oil-feed oil distribution casing (2), and rear is on rear pump cover (1) or the front pump cover (8); An end opening of first section is circular groove, and the circular groove center of circle is concentric with rotor (6), and the notch of circular groove is over against the connection hydraulic fluid port of root of blade oil pocket (21).
6. the switching controls hydraulic system of an automobile-used hydraulic vane pump motor as claimed in claim 1 is characterized in that: comprise accumulator (43), three-position electromagnetic selector valve (42) and selector valve (41); Selector valve (41) output terminal one hydraulic fluid port connects static pressure oil-in chamber (5), another hydraulic fluid port connects root of blade oil pocket (21), and the input end hydraulic fluid port inserts signal oil, and at the oil duct that inserts one-way valve is set; The hydraulic fluid port of the output terminal of three-position electromagnetic selector valve (42) inserts filler opening (19), oil outlet (18) respectively, and the hydraulic fluid port of input end inserts fuel tank and accumulator respectively.
7. the switching controls hydraulic system of a kind of automobile-used hydraulic vane pump motor according to claim 6, it is characterized in that: oil circuit arranges branch road to be communicated with root of blade oil pocket (21) between filler opening (19), oil outlet (18) and the three-position electromagnetic selector valve (42), on this branch road one-way valve is set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220629082 CN203146319U (en) | 2012-11-23 | 2012-11-23 | Vehicle hydraulic vane pump motor and switching control hydraulic system thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220629082 CN203146319U (en) | 2012-11-23 | 2012-11-23 | Vehicle hydraulic vane pump motor and switching control hydraulic system thereof |
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| CN203146319U true CN203146319U (en) | 2013-08-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220629082 Expired - Fee Related CN203146319U (en) | 2012-11-23 | 2012-11-23 | Vehicle hydraulic vane pump motor and switching control hydraulic system thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104033329A (en) * | 2013-03-06 | 2014-09-10 | 宁波高新协力机电液有限公司 | Radial-roller high-speed variable-displacement oil motor |
| CN108425841A (en) * | 2018-05-31 | 2018-08-21 | 马长永 | Rotor and hydraulic pump with the rotor |
| CN112936016A (en) * | 2021-02-09 | 2021-06-11 | 中国航发哈尔滨东安发动机有限公司 | Engine rotor blade tip processingequipment |
-
2012
- 2012-11-23 CN CN 201220629082 patent/CN203146319U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104033329A (en) * | 2013-03-06 | 2014-09-10 | 宁波高新协力机电液有限公司 | Radial-roller high-speed variable-displacement oil motor |
| CN108425841A (en) * | 2018-05-31 | 2018-08-21 | 马长永 | Rotor and hydraulic pump with the rotor |
| CN112936016A (en) * | 2021-02-09 | 2021-06-11 | 中国航发哈尔滨东安发动机有限公司 | Engine rotor blade tip processingequipment |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130821 Termination date: 20211123 |
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| CF01 | Termination of patent right due to non-payment of annual fee |