CN103470553A - Procession speed limiting device for anti-rolling gyroscope - Google Patents
Procession speed limiting device for anti-rolling gyroscope Download PDFInfo
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- CN103470553A CN103470553A CN2013104087086A CN201310408708A CN103470553A CN 103470553 A CN103470553 A CN 103470553A CN 2013104087086 A CN2013104087086 A CN 2013104087086A CN 201310408708 A CN201310408708 A CN 201310408708A CN 103470553 A CN103470553 A CN 103470553A
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Abstract
The invention discloses a procession speed limiting device for an anti-rolling gyroscope. The device is used for controlling the procession speed of a rotor frame of the anti-rolling gyroscope. The rotor frame processions around a procession shaft. The procession speed limiting device comprises at least one hydraulic ram and a speed limit valve. A ship swings along with waves to enable the hydraulic ram to telescope constantly. Pipes forming two hydraulic loops are in one-way communication, so that hydraulic oil flows in from an oil inlet of the speed limit valve and flows out from an oil outlet. By adjusting the flow of the speed limit valve, the moving speed of a piston component can be controlled, and the procession speed can be controlled. The device has the advantages of being capable of performing speed limiting of procession of the anti-rolling gyroscope and expanding the effective anti-rolling range of the anti-rolling gyroscope, simple in structure and low in manufacture cost.
Description
Technical field
The invention belongs to the stabilizer for reducing ship rocking technical field, be specifically related to a kind of precession arrangements for speed regulation that shake gyro that subtract.
Background technique
Subtract and shake gyro and belong to stabilizer for reducing ship rocking, can effectively alleviate ship rolling.Ships and light boats can wave under the effect of wave, wherein maximum with rolling harm.Stabilizer for reducing ship rocking has stabilizer, tank stabilizer, subtracts and shake gyro etc., cuts both ways.Wherein, subtracting the major advantage of shaking gyro is the restriction that anti-rolling effect is not subject to the ships and light boats speed of a ship or plane, and small volume, is convenient to install, and for example, can be attached to (and other stabilizer is difficult to install additional) on the ships and light boats of being on active service.Subtract and shake gyro and mainly formed by parts such as rotor and drive unit thereof, rotor frame, rotor frame precession control gear, installing base frame.Wherein, under the effect of ships and light boats at wave, produce while waving, rotor is arranged in rotor frame, around an axis of rotation rotation; Rotor with rotor frame around a precession axis precession.Subtract and shake the moment of reaction produced when opplied moment that gyro produces ships and light boats derives from the rotor frame precession, only have when this moment and wave action moment are about and just can subtract and shake when anti-phase, during about homophase, effect increases and shakes.Out-of-control the subtracting of the precessional evlocity of rotor frame shaken gyro and be called pure passive subtracting and shake gyro, be similar to pure passive tank stabilizer, although can subtract and shake in the design conditions scope, while exceeding the design conditions scope, likely can increase and shake.Therefore, need to install the precession control gear additional, the precessional evlocity of rotor frame is controlled.Current existing technology is mainly to use damper to realize the precession of rotor frame is controlled to (be speed governing, also cry brake).Damper is connected with precession axis, and damping function can make the precession amplitude reduce, and plays and subtracts the effect of shaking.But, the precession arrangements for speed regulation complex structure of employing damper, cost is higher.
Summary of the invention
In order to overcome the defect existed in prior art, the invention provides the precession speed limiting device that gyro is shaken in a kind of simple in structure, with low cost subtracting, concrete technological scheme is as follows:
A kind of precession speed limiting device that shakes gyro that subtracts, controlled for the precessional evlocity to subtracting the rotor frame that shakes gyro, and rotor frame is around a precession axis precession, and this precession speed limiting device comprises the first hydraulic jack and speed limited valve,
The inside of the first hydraulic jack is provided with piston assembly, and piston assembly comprises interconnective piston and piston rod; Piston is the first cylinder chamber and the second cylinder chamber by the interior separation of the first hydraulic jack, and wherein, the side that piston connects piston rod is the second cylinder chamber, and the opposite side of piston is the first cylinder chamber; The first hydraulic jack is provided with the first oil inlet and outlet and the second oil inlet and outlet, and wherein, the first oil inlet and outlet is communicated with the first cylinder chamber and oil cylinder outside, and the second oil inlet and outlet is communicated with the second cylinder chamber and oil cylinder outside; Piston rod is connected with a connecting rod, and connecting rod is connected with the precession axis of rotor frame;
Speed limited valve comprises filler opening and oil outlet, and the first oil inlet and outlet unilaterally connected is to filler opening, and the oil outlet unilaterally connected, to the second oil inlet and outlet, forms an oil hydraulic circuit; The second oil inlet and outlet unilaterally connected is to filler opening, and the oil outlet unilaterally connected, to the first oil inlet and outlet, forms another oil hydraulic circuit;
The inside of speed limited valve is provided with the spool that longitudinal section is the Ω type, and spool is divided into the inside of speed limited valve into oil pocket and goes out oil pocket; The longitudinal section that enters oil pocket is inverted U-shaped, and the longitudinal section that goes out oil pocket is convex; The roof of spool is provided with leakage hole, and the sidewall of spool is provided with valve port, enters in oil pocket to be provided with spring.
As optimized project, this precession speed limiting device also comprises solenoid directional control valve; Solenoid directional control valve comprises the first valve port, the second valve port, the 3rd valve port and the 4th valve port, wherein, the first valve port is communicated with the first oil inlet and outlet of the first hydraulic jack, the second valve port is communicated with filler opening, the 3rd valve port is communicated with the second oil inlet and outlet of the first hydraulic jack, and the 4th valve port is communicated with oil outlet;
Solenoid directional control valve comprises the first mode of operation and the second mode of operation;
When in the first mode of operation, the first valve port to the four valve port unilaterally connecteds, the second valve port to the three valve port unilaterally connecteds, form an oil hydraulic circuit;
When in the second mode of operation, the 3rd valve port to the four valve port unilaterally connecteds, the second valve port, to the first valve port unilaterally connected, forms another oil hydraulic circuit;
When the piston assembly of the first hydraulic jack shrinks, solenoid directional control valve is in the first mode of operation; When the piston assembly of the first hydraulic jack stretches out, solenoid directional control valve is in the second mode of operation.
As optimized project, this precession speed limiting device also comprises second hydraulic jack identical with the first hydraulic jack structure; The piston rod of the second hydraulic jack is connected with connecting rod, and the first oil inlet and outlet of the second hydraulic jack is communicated with the 3rd valve port, and the second oil inlet and outlet of the second hydraulic jack is communicated with the second oil inlet and outlet of the first hydraulic jack.
As optimized project, this precession speed limiting device also comprises the first one-way valve, the second one-way valve, the 3rd one-way valve and the 4th one-way valve that structure is identical, and the first one-way valve, the second one-way valve, the 3rd one-way valve and the 4th one-way valve are equipped with entrance and exit;
The first oil inlet and outlet of the first hydraulic jack is communicated with the entrance of the first one-way valve, the outlet of the first one-way valve is communicated with filler opening, oil outlet is communicated with the entrance of the 4th one-way valve, and the outlet of the 4th one-way valve is communicated with the second oil inlet and outlet of the first hydraulic jack, forms an oil hydraulic circuit;
The second oil inlet and outlet of the first hydraulic jack is communicated with the entrance of the second one-way valve, the outlet of the second one-way valve is communicated with filler opening, oil outlet is communicated with the entrance of the 3rd one-way valve, and the outlet of the 3rd one-way valve is communicated with the first oil inlet and outlet of the first hydraulic jack, forms another oil hydraulic circuit.
Compared with prior art, the present invention has following beneficial effect:
(1) the present invention can carry out speed limit to subtracting the precession of shaking gyro, enlarge subtract shake gyro effectively subtract the scope of shaking;
(2) the present invention is simple in structure, cheap for manufacturing cost.
The accompanying drawing explanation
The structural representation of Fig. 1 embodiment of the present invention 1;
The structural representation of Fig. 2 embodiment of the present invention 2;
The structural representation of Fig. 3 embodiment of the present invention 3.
In upper figure, sequence number is: 11-the first hydraulic jack, 12-the second hydraulic jack, 2-connecting rod, 3-hydraulic pipe line, 4-speed limited valve, 41-filler opening, 42-oil outlet, 5-spring, 6-spool, 7-valve port, 8-leakage hole, 9-solenoid directional control valve, 91-the first valve port, 92-the second valve port, 93-the 3rd valve port, 94-the 4th valve port, 101-the first one-way valve, 102-the second one-way valve, 103-the 3rd one-way valve, 104-the 4th one-way valve.
Embodiment
Describe the present invention below in conjunction with accompanying drawing in detail in embodiment's mode.
Embodiment 1:
As shown in Figure 1, a kind of precession speed limiting device that shakes gyro that subtracts, controlled for the precessional evlocity to subtracting the rotor frame that shakes gyro, and rotor frame is around a precession axis precession, this precession speed limiting device comprises the first hydraulic jack 11 and speed limited valve 4, between each components and parts, by pipeline 3, is communicated with.
The inside of the first hydraulic jack 11 is provided with piston assembly, and piston assembly comprises interconnective piston and piston rod; Piston is the first cylinder chamber and the second cylinder chamber by the interior separation of the first hydraulic jack 11, and wherein, the side that piston connects piston rod is the second cylinder chamber, and the opposite side of piston is the first cylinder chamber; The first hydraulic jack 11 is provided with the first oil inlet and outlet and the second oil inlet and outlet, and wherein, the first oil inlet and outlet is communicated with the first cylinder chamber and oil cylinder outside, and the second oil inlet and outlet is communicated with the second cylinder chamber and oil cylinder outside; Piston rod is connected with a connecting rod 2, and connecting rod 2 is connected with the precession axis of rotor frame.
Speed limited valve 4 comprises that filler opening 41 and oil outlet 42, the first oil inlet and outlet unilaterally connecteds are to filler opening 41, and oil outlet 42 unilaterally connecteds, to the second oil inlet and outlet, form an oil hydraulic circuit; The second oil inlet and outlet unilaterally connected is to filler opening 41, and oil outlet 42 unilaterally connecteds, to the first oil inlet and outlet, form another oil hydraulic circuit.
In the present embodiment, the longitudinal section of speed limited valve 4 is rectangular, and the inside of speed limited valve 4 is provided with the spool 6 that longitudinal section is the Ω type, and spool 6 is divided into the inside of speed limited valve 4 into oil pocket and goes out oil pocket, enters oil pocket and is communicated with filler opening 41, goes out oil pocket and is communicated with oil outlet 42; The longitudinal section that enters oil pocket is inverted U-shaped, and the longitudinal section that goes out oil pocket is convex.The roof of spool 6 is provided with leakage hole 8, and the hydraulic oil entered in oil pocket leaks into out in oil pocket by this leakage hole 8; The sidewall of spool 6 is provided with valve port 7, and when the flow velocity of hydraulic oil reaches default Peak Flow Rate, the hydraulic power of hydraulic oil is closed valve port 7.Enter in oil pocket to be equipped with spring 5, an end of spring 5 is connected with the top of speed limited valve 4, and the other end of spring 5 is connected with the end face of spool 6 bottoms, and spring 5 is for setting Peak Flow Rate, and the pre compressed magnitude of adjusting spring 5 by adjustment can reach the effect of limited flow rate.
Unilaterally connected of the present invention can be realized by the combination of the components and parts such as solenoid directional control valve or one-way valve, adopted in the present embodiment solenoid directional control valve, but be not limited to this.
Adopt solenoid directional control valve to realize that unilaterally connected scheme is: as shown in Figure 1, the precession speed limiting device also comprises solenoid directional control valve 9; Solenoid directional control valve comprises the first valve port 91, the second valve port 92, the 3rd valve port 93 and the 4th valve port 94, wherein, the first valve port 91 is communicated with the first oil inlet and outlet of the first hydraulic jack 11, the second valve port 92 is communicated with filler opening 41, the 3rd valve port 93 is communicated with the second oil inlet and outlet of the first hydraulic jack 11, and the 4th valve port 94 is communicated with oil outlet 42.
Solenoid directional control valve 9 comprises the first mode of operation and the second mode of operation;
When in the first mode of operation, the first valve port 91 is to the 4th valve port 94 unilaterally connecteds, and the second valve port 92, to the 3rd valve port 93 unilaterally connecteds, forms an oil hydraulic circuit;
When in the second mode of operation, the 3rd valve port 93 is to the 4th valve port 94 unilaterally connecteds, and the second valve port 92 to first valve port 91 unilaterally connecteds, form another oil hydraulic circuit.
When the piston assembly of the first hydraulic jack 11 shrinks, solenoid directional control valve 9 is in the first mode of operation; When the piston assembly of the first hydraulic jack 11 stretches out, solenoid directional control valve 9 is in the second mode of operation.
Take the present embodiment as example, illustrate working principle of the present invention:
When boats and ships wave, subtract shake gyro rotor frame around the precession axis precession, the piston assembly that precession axis drives in the first hydraulic jacks 11 by connecting rod 2 is flexible.
When piston assembly shrinks, solenoid directional control valve 9 is in the first mode of operation, the first cylinder chamber of the first hydraulic jack 11 is shunk, hydraulic oil enters filler opening 41 by the first oil inlet and outlet via solenoid directional control valve 9, the flow velocity of 4 pairs of hydraulic oil of speed limited valve is controlled, hydraulic oil through speed limited valve 4 flows into the second oil inlet and outlet by oil outlet 42 via solenoid directional control valve 9, and the second cylinder chamber expansion of the first hydraulic jack 11, form an oil hydraulic circuit.
When piston assembly stretches out, solenoid directional control valve 9 is in the second mode of operation, the second cylinder chamber of the first hydraulic jack 11 is shunk, hydraulic oil enters filler opening 41 by the second oil inlet and outlet via solenoid directional control valve 9, the flow velocity of 4 pairs of hydraulic oil of speed limited valve is controlled, hydraulic oil through speed limited valve 4 flows into the first oil inlet and outlet by oil outlet 42 via solenoid directional control valve 9, and the first cylinder chamber expansion of the first hydraulic jack 11, form another oil hydraulic circuit.
Because boats and ships constantly wave with wave, the piston assembly that precession axis is passed through in connecting rod 2 drive the first hydraulic jacks 11 is constantly flexible, and said process moves in circles.Because the pipeline of two oil hydraulic circuits that form is unilaterally connected, hydraulic oil always from the filler opening 41 of speed limited valve 4 enter, oil outlet 42 flows out.Regulated by the flow to speed limited valve 4, got final product the movement velocity of control piston assembly, and then controlled precessional evlocity.
The control principle of 4 pairs of hydraulic fluid flow rates of speed limited valve is: the Peak Flow Rate of hydraulic oil
by formula
determine, wherein,
for the elasticity coefficient of spring 5,
for the pre compressed magnitude of spring 5,
for the density of mass of hydraulic oil,
the maximum cross-section area for the spool 6 of speed limited valve 4.When the flow velocity of hydraulic oil reaches
after, the hydraulic power of hydraulic oil will make valve port 7 close, and after this, hydraulic oil flows through from leakage hole 8 in the mode of leaking always.The flow area of the size of leakage flow and leakage hole 8, the factors such as pressure reduction of leakage hole 8 front and back are relevant.The pre compressed magnitude of spring 5 can be set before speed limited valve 4 assemblings, also can on speed limited valve 4, regulating handle be installed, after speed limited valve 4 assemblings, adjust the pre compressed magnitude of spring 5 by regulating handle, to reach the purpose of adjusting in real time as required speed limited valve 4 Peak Flow Rates.The effect of this restriction hydraulic oil Peak Flow Rate of speed limited valve 4 will limit the stretching speed of hydraulic jack, thereby the restriction precessional evlocity obtains effectively subtracting of the gyro scope of shaking and expands.
Embodiment 2:
The present invention needs at least one hydraulic jack, can only adopt a hydraulic jack as in Example 1, also can increase as required other hydraulic jacks, and embodiment 2 is the embodiment that adopts two hydraulic jacks.
As shown in Figure 2, the present embodiment is with embodiment 1 difference: the precession speed limiting device also comprises second hydraulic jack 12 identical with the first hydraulic jack 11 structures; The piston rod of the second hydraulic jack 12 is connected with connecting rod 2, and the first oil inlet and outlet of the second hydraulic jack 12 is communicated with the 3rd valve port 93, and the second oil inlet and outlet of the second hydraulic jack 12 is communicated with the second oil inlet and outlet of the first hydraulic jack 11.The present embodiment adopts the advantage of two oil cylinders to be, two oil cylinders designs are symmetric the radial effect power of precession axis bearing, is conducive to improve bearing working life.The other technologies scheme of the present embodiment is all identical with embodiment 1, and working principle is also basic identical, does not repeat them here.
Embodiment 3:
As previously mentioned, unilaterally connected of the present invention can be by the combination realization of the components and parts such as solenoid directional control valve or one-way valve, and the present embodiment is the scheme that adopts some one-way valves, but is not limited to this.
As shown in Figure 3, the present embodiment is with embodiment 1 difference: the precession speed limiting device also comprises that the first one-way valve 101, the second one-way valve 102, the 3rd one-way valve 103 and the 4th one-way valve 104, the first one-way valves 101, the second one-way valve 102, the 3rd one-way valve 103 and the 4th one-way valve 104 that structure is identical are equipped with entrance and exit.
The first oil inlet and outlet of the first hydraulic jack 11 is communicated with the entrance of the first one-way valve 101, the outlet of the first one-way valve 101 is communicated with filler opening 41, oil outlet 42 is communicated with the entrance of the 4th one-way valve 104, the outlet of the 4th one-way valve 104 is communicated with the second oil inlet and outlet of the first hydraulic jack 11, forms an oil hydraulic circuit;
The second oil inlet and outlet of the first hydraulic jack 11 is communicated with the entrance of the second one-way valve 102, the outlet of the second one-way valve 102 is communicated with filler opening 41, oil outlet 42 is communicated with the entrance of the 3rd one-way valve 103, the outlet of the 3rd one-way valve 103 is communicated with the first oil inlet and outlet of the first hydraulic jack 11, forms another oil hydraulic circuit.
The other technologies scheme of the present embodiment is all identical with embodiment 1, and working principle is also basic identical, does not repeat them here.
Above disclosed be only several specific embodiments of the application, but the not limited thereto the changes that any person skilled in the art can think of of the application all should drop in the application's protection domain.
Claims (4)
1. one kind subtracts the precession speed limiting device that shakes gyro, for the precessional evlocity that subtracts the rotor frame that shakes gyro is controlled, described rotor frame, around a precession axis precession, is characterized in that, this precession speed limiting device comprises the first hydraulic jack (11) and speed limited valve (4)
The inside of described the first hydraulic jack (11) is provided with piston assembly, and described piston assembly comprises interconnective piston and piston rod; Described piston is the first cylinder chamber and the second cylinder chamber by the interior separation of described the first hydraulic jack (11), and wherein, the side that described piston connects described piston rod is the second cylinder chamber, and the opposite side of described piston is the first cylinder chamber; Described the first hydraulic jack (11) is provided with the first oil inlet and outlet and the second oil inlet and outlet, and wherein, described the first oil inlet and outlet is communicated with described the first cylinder chamber and oil cylinder outside, and described the second oil inlet and outlet is communicated with described the second cylinder chamber and oil cylinder outside; Described piston rod is connected with a connecting rod (2), and described connecting rod (2) is connected with the precession axis of described rotor frame;
Described speed limited valve (4) comprises filler opening (41) and oil outlet (42), and described the first oil inlet and outlet unilaterally connected is to described filler opening (41), and described oil outlet (42) unilaterally connected, to described the second oil inlet and outlet, forms an oil hydraulic circuit; Described the second oil inlet and outlet unilaterally connected is to described filler opening (41), and described oil outlet (42) unilaterally connected, to described the first oil inlet and outlet, forms another oil hydraulic circuit;
The inside of described speed limited valve (4) is provided with the spool (6) that longitudinal section is the Ω type, and described spool (6) is divided into the inside of described speed limited valve (4) into oil pocket and goes out oil pocket; The described longitudinal section that enters oil pocket is inverted U-shaped, and the described longitudinal section that goes out oil pocket is convex; The roof of described spool (6) is provided with leakage hole (8), and the sidewall of described spool (6) is provided with valve port (7), describedly enters in oil pocket to be provided with spring (5).
2. a kind of precession speed limiting device that shakes gyro that subtracts according to claim 1, is characterized in that, also comprises solenoid directional control valve (9); Described solenoid directional control valve comprises the first valve port (91), the second valve port (92), the 3rd valve port (93) and the 4th valve port (94), wherein, described the first valve port (91) is communicated with the first oil inlet and outlet of described the first hydraulic jack (11), described the second valve port (92) is communicated with described filler opening (41), described the 3rd valve port (93) is communicated with the second oil inlet and outlet of described the first hydraulic jack (11), and described the 4th valve port (94) is communicated with described oil outlet (42);
Described solenoid directional control valve (9) comprises the first mode of operation and the second mode of operation;
When in the first mode of operation, described the first valve port (91) is to described the 4th valve port (94) unilaterally connected, and described the second valve port (92), to described the 3rd valve port (93) unilaterally connected, forms an oil hydraulic circuit;
When in the second mode of operation, described the 3rd valve port (93) is to described the 4th valve port (94) unilaterally connected, and described the second valve port (92), to described the first valve port (91) unilaterally connected, forms another oil hydraulic circuit;
When the piston assembly of described the first hydraulic jack (11) shrinks, described solenoid directional control valve (9) is in the first mode of operation; When the piston assembly of described the first hydraulic jack (11) stretches out, described solenoid directional control valve (9) is in the second mode of operation.
3. a kind of precession speed limiting device that shakes gyro that subtracts according to claim 2, is characterized in that, also comprises second hydraulic jack (12) identical with described the first hydraulic jack (11) structure; The piston rod of described the second hydraulic jack (12) is connected with described connecting rod (2), the first oil inlet and outlet of described the second hydraulic jack (12) is communicated with described the 3rd valve port (93), and the second oil inlet and outlet of described the second hydraulic jack (12) is communicated with the second oil inlet and outlet of described the first hydraulic jack (11).
4. a kind of precession speed limiting device that shakes gyro that subtracts according to claim 1, it is characterized in that, also comprise the first one-way valve (101), the second one-way valve (102), the 3rd one-way valve (103) and the 4th one-way valve (104) that structure is identical, described the first one-way valve (101), described the second one-way valve (102), described the 3rd one-way valve (103) and described the 4th one-way valve (104) are equipped with entrance and exit;
The first oil inlet and outlet of described the first hydraulic jack (11) is communicated with the entrance of described the first one-way valve (101), the outlet of described the first one-way valve (101) is communicated with described filler opening (41), described oil outlet (42) is communicated with the entrance of described the 4th one-way valve (104), the outlet of described the 4th one-way valve (104) is communicated with the second oil inlet and outlet of described the first hydraulic jack (11), forms an oil hydraulic circuit;
The second oil inlet and outlet of described the first hydraulic jack (11) is communicated with the entrance of described the second one-way valve (102), the outlet of described the second one-way valve (102) is communicated with described filler opening (41), described oil outlet (42) is communicated with the entrance of described the 3rd one-way valve (103), the outlet of described the 3rd one-way valve (103) is communicated with the first oil inlet and outlet of described the first hydraulic jack (11), forms another oil hydraulic circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310408708.6A CN103470553B (en) | 2013-09-10 | 2013-09-10 | A kind ofly subtract the precession speed limiting device shaking gyro |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310408708.6A CN103470553B (en) | 2013-09-10 | 2013-09-10 | A kind ofly subtract the precession speed limiting device shaking gyro |
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| CN103470553A true CN103470553A (en) | 2013-12-25 |
| CN103470553B CN103470553B (en) | 2015-10-14 |
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| CN201310408708.6A Expired - Fee Related CN103470553B (en) | 2013-09-10 | 2013-09-10 | A kind ofly subtract the precession speed limiting device shaking gyro |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106907362A (en) * | 2017-04-14 | 2017-06-30 | 中国船舶重工集团公司第七0四研究所 | Subtracting based on magnetic flow liquid shakes gyroscopic procession control system |
| CN114263642A (en) * | 2021-12-23 | 2022-04-01 | 上海新跃联汇电子科技有限公司 | Anti-rolling gyroscope precession speed control device and control method |
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| US4350078A (en) * | 1979-01-02 | 1982-09-21 | Akermans Verkstad Ab | Apparatus for restricting the velocity of a hydraulic piston in its end positions |
| JPH09119405A (en) * | 1995-09-12 | 1997-05-06 | Caterpillar Inc | Snap device for hydraulic cylinder |
| CN2518893Y (en) * | 2002-01-10 | 2002-10-30 | 三一重工股份有限公司 | Left and right lifting oil cylinder synchronous device for asphalt concrete paver mangle |
| CN201040701Y (en) * | 2007-04-20 | 2008-03-26 | 天津港第四港埠公司 | Fork lift hydraulic driving device |
| CN203476860U (en) * | 2013-09-10 | 2014-03-12 | 上海羽翼船舶设备有限公司 | Precession speed limiting device of stabilization gyro |
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2013
- 2013-09-10 CN CN201310408708.6A patent/CN103470553B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4350078A (en) * | 1979-01-02 | 1982-09-21 | Akermans Verkstad Ab | Apparatus for restricting the velocity of a hydraulic piston in its end positions |
| JPH09119405A (en) * | 1995-09-12 | 1997-05-06 | Caterpillar Inc | Snap device for hydraulic cylinder |
| CN2518893Y (en) * | 2002-01-10 | 2002-10-30 | 三一重工股份有限公司 | Left and right lifting oil cylinder synchronous device for asphalt concrete paver mangle |
| CN201040701Y (en) * | 2007-04-20 | 2008-03-26 | 天津港第四港埠公司 | Fork lift hydraulic driving device |
| CN203476860U (en) * | 2013-09-10 | 2014-03-12 | 上海羽翼船舶设备有限公司 | Precession speed limiting device of stabilization gyro |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106907362A (en) * | 2017-04-14 | 2017-06-30 | 中国船舶重工集团公司第七0四研究所 | Subtracting based on magnetic flow liquid shakes gyroscopic procession control system |
| CN106907362B (en) * | 2017-04-14 | 2018-08-21 | 中国船舶重工集团公司第七0四研究所 | Subtracting based on magnetorheological fluid shakes gyroscopic procession control system |
| CN114263642A (en) * | 2021-12-23 | 2022-04-01 | 上海新跃联汇电子科技有限公司 | Anti-rolling gyroscope precession speed control device and control method |
| CN114263642B (en) * | 2021-12-23 | 2023-06-30 | 上海新跃联汇电子科技有限公司 | Device and method for controlling precession speed of anti-rolling gyroscope |
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| Publication number | Publication date |
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| CN103470553B (en) | 2015-10-14 |
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