CN101963164A - Accumulator replenishing valve of full-hydraulic braking system of engineering machinery - Google Patents
Accumulator replenishing valve of full-hydraulic braking system of engineering machinery Download PDFInfo
- Publication number
- CN101963164A CN101963164A CN 201010270276 CN201010270276A CN101963164A CN 101963164 A CN101963164 A CN 101963164A CN 201010270276 CN201010270276 CN 201010270276 CN 201010270276 A CN201010270276 A CN 201010270276A CN 101963164 A CN101963164 A CN 101963164A
- Authority
- CN
- China
- Prior art keywords
- valve
- oil
- communicated
- filler opening
- way valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
The invention discloses an accumulator replenishing valve of a full-hydraulic braking system of engineering machinery, which comprises a replenishing valve oil inlet, two replenishing valve working oil holes and a replenishing valve oil return hole, wherein the two replenishing valve working oil holes are respectively communicated with two accumulators; meanwhile, the two replenishing valve working oil holes are also respectively communicated with oil inlets of two hydraulic master valves, the replenishing valve is provided with two two-position and two-way valves, and the oil outlet of each two-position and two-way valve is communicated with one accumulator; the on positions of the two-position and two-way valves are controlled by oil paths of oil inlets of the two-position and two-way valves, and the oil paths of the oil inlets of the two-position and two-way valves are communicated; and the off positions of the two-position and two-way valves are controlled by oil outlets of the two-position and two-way valves. Adopting the technical scheme, the accumulator replenishing valve is in a full-hydraulic braking system structure, wherein various technological parameters and property indexes meet design requirements of the hydraulic system, the working state is stable and reliable, and the safety property is good.
Description
Technical field
The invention belongs to the technical field of engineering machinery, relate to the braking system of engineering machinery vehicle operation, more particularly, the present invention relates to a kind of accumulator charging valve of engineering machinery full power hydraulic brake system.
Background technique
In the prior art, the accumulator charging valve (SL02) that the engineering machinery full power hydraulic brake system adopts, its internal structure is complicated, not exclusively be hydraulic control, hole axle fit dimension precision height (rigid seal), it is big to make difficulty of processing, the kernel component dynamic sealing performance instability that the pass is built, leak easily, do not satisfy the requirement of product leakage test, cause the braking system accumulator to lose efficacy.
Summary of the invention
Problem to be solved by this invention provides a kind of accumulator charging valve of engineering machinery full power hydraulic brake system, its objective is product structure is simplified, and improves the sealability and the working life of product.
To achieve these goals, the technological scheme taked of the present invention is:
The accumulator charging valve of engineering machinery full power hydraulic brake system provided by the present invention comprises that liquid-filling valve filler opening, two fill hydrovalve actuator port and liquid-filling valve return opening, and described two are filled the hydrovalve actuator port and are communicated with two accumulators respectively; Simultaneously, two are filled the hydrovalve actuator port and also are connected with two hydraulic pressure main valves respectively, and described liquid-filling valve is established two two position two-way valves, and each two position two-way valve oil outlet is communicated with an accumulator; The connection position of described two position two-way valve is by the control of two position two-way valve filler opening oil circuit, and two two position two-way valve filler opening oil circuits are communicated with; Controlling by this two position two-way valve oil outlet of described each two position two-way valve by the position.
Described liquid-filling valve is established the oil-feed control valve, and described oil-feed control valve is a two-position three-way valve, and described oil-feed control valve oil outlet is communicated with described two position two-way valve filler opening by filter cleaner, throttle valve and one-way valve; Described oil-feed control valve filler opening is described liquid-filling valve filler opening; The return opening of described oil-feed control valve is the heat radiation hydraulic fluid port, and described heat radiation hydraulic fluid port is communicated with the hydraulic pressure radiation system; Two control ends of described oil-feed control valve are respectively input pressure control end and intermediate pressure control end.
Described liquid-filling valve is established oil pressure adjusting valve, and described oil pressure adjusting valve is the two-position three-way valve of spring reset, and the spool control end of described oil pressure adjusting valve is communicated with described two position two-way valve filler opening oil circuit; Do the time spent at described spool control end, the intermediate pressure control end of described oil-feed control valve is communicated with the liquid-filling valve return opening, and at this moment, described liquid-filling valve filler opening all is communicated with two position two-way valve filler opening and heat radiation hydraulic fluid port; When described spool control end resets, described two position two-way valve filler opening is connected with the intermediate pressure control end of described oil-feed control valve, at this moment, described liquid-filling valve filler opening is communicated with the two position two-way valve filler opening, and described liquid-filling valve filler opening is communicated with throttle valve, heat radiation hydraulic fluid port.
Described two position two-way valve filler opening oil circuit is communicated with low pressure warning switch.
The valve body material of described liquid-filling valve is spheroidal graphite cast iron QT450-10.
The seal ring of the sealing usefulness of described liquid-filling valve is the star seal ring, and promptly the section of described seal ring is " X " shape.
The processing method of the spool bore of described liquid-filling valve is: thick finish turning, expansion fraising, thick microhoning, roll extrusion and polishing technology.
The present invention adopts technique scheme, is the full power hydraulic brake system structure, and its every technical parameter and performance index have satisfied the Design of Hydraulic System requirement, and stable working state is reliable, and Safety performance is good.
Description of drawings
Below expressed content of each width of cloth accompanying drawing of this specification and the mark among the figure are made brief description:
Fig. 1 is the working principle schematic representation of accumulator charging valve in system among the present invention;
Fig. 2 is the structural representation of the accumulator charging valve among the present invention;
Fig. 3 looks schematic representation for the right side of structure shown in Fig. 2;
Fig. 4 is the B-B cross-sectional schematic among Fig. 2;
Fig. 5 is the C-C cross-sectional schematic among Fig. 3.
Be labeled as among the figure:
1, hex head bolt, 2, O shape circle, 3, return spring, 4, guide valve seat, 5, O shape circle, 6, check valve body, 7, O shape circle, 8, hexagonal spiro plug, 9, O shape circle, 10, return spring, 11, the submissile spring abutment, 12, steel ball, 13, small piston rod, 14, O shape circle, 15, fastening axle sleeve, 16, O shape circle, 17, the big spring seat, 18, pressure adjusting spring, 19, the plastics fixed pin, 20, the pressure regulation plug screw, 21, the filter cleaner lining ring, 22, filter cleaner, 23, the filter cleaner trim ring, 24, the valve port base, 25, valve seat, 26, the double end plug screw, 27, O shape circle, 8 seal washers, 29, the double end nut, 30, piston, 31, the star seal ring, 32, the spring position limit socket, 33, spring, 34, O shape circle, 35, plug screw, 36, body.
Embodiment
Contrast accompanying drawing below, by description to embodiment, to effect and working principle, the manufacturing process of the mutual alignment between the shape of the specific embodiment of the present invention such as related each member, structure, the each several part and annexation, each several part and manipulate method etc., be described in further detail, inventive concept of the present invention, technological scheme had more complete, accurate and deep understanding to help those skilled in the art.
The of the present invention structure expressed as Fig. 1 to Fig. 5, the present invention is a kind of accumulator charging valve of engineering machinery full power hydraulic brake system, comprise that liquid-filling valve filler opening (P), two fill hydrovalve actuator port (A1, A2) and liquid-filling valve return opening (T), described two are filled the hydrovalve actuator port and are communicated with two accumulators respectively; Simultaneously, two are filled the hydrovalve actuator port and also are communicated with the filler opening of two hydraulic pressure main valves respectively.
The volume of accumulator is 1.6L.Liquid-filling valve filler opening (P) is connected with oil hydraulic pump, by the oil hydraulic pump fuel feeding.Relief valve is established in the oil hydraulic pump outlet port, sets up system pressure.When system pressure was too high, relief valve was opened draining.
Working principle of the present invention:
By oil pump systems, accumulator charging valve interface P topping up is given in pressurization, opens central oil-way system and obtains order, under the speed that sets in advance; Reach (max) standard pressure value, to the accumulator topping up.When the needs pressurization moved on, the control oil pressure cut off, and liquid-filling valve cuts out.When oil cylinder topping up valve pocket was got high pressure oil and advanced backhaul at a slow speed, liquid-filling valve was connected oil pressure once more, and fluid is by the quick oil sump tank of liquid-filling valve (interface T), simultaneously to other interface topping up.
The accumulator charging valve of engineering machinery full power hydraulic brake system provided by the present invention is established two two position two-way valves, and each two position two-way valve oil outlet is communicated with an accumulator; The connection position of described two position two-way valve is by the control of two position two-way valve filler opening oil circuit, and two two position two-way valve filler opening oil circuits are communicated with; Controlling by this two position two-way valve oil outlet of described each two position two-way valve by the position.
The Development and design exploitation of (SL02 accumulator charging valve) of the present invention belongs to full power hydraulic brake system new principle structure, fills the domestic gaps.By user rs authentication, the every technical parameter and the performance of accumulator charging valve have reached the Design of Hydraulic System requirement, have opened up market, have improved sales achievement.
Liquid-filling valve of the present invention is established the oil-feed control valve, described oil-feed control valve is a two position three-way valve, described oil-feed control valve oil outlet is communicated with described two position two-way valve filler opening by filter cleaner, throttle valve and one-way valve, is communicated with the control return opening simultaneously with another two position three-way valve; Described oil-feed control valve filler opening is described liquid-filling valve filler opening; The return opening of described oil-feed control valve is heat radiation hydraulic fluid port (O), and described heat radiation hydraulic fluid port is communicated with the hydraulic pressure radiation system; Two control ends of described oil-feed control valve are respectively input pressure control end and intermediate pressure control end.
Liquid-filling valve of the present invention is established oil pressure adjusting valve, and described oil pressure adjusting valve is the two-position three-way valve of spring reset, and the spool control end of described oil pressure adjusting valve is communicated with described two position two-way valve filler opening oil circuit; Do the time spent at described spool control end, the intermediate pressure control end of described oil-feed control valve is communicated with the liquid-filling valve return opening, and at this moment, described liquid-filling valve filler opening all is communicated with two position two-way valve filler opening and heat radiation hydraulic fluid port; When described spool control end resets, described two position two-way valve filler opening is connected with the intermediate pressure control end of described oil-feed control valve, at this moment, described liquid-filling valve filler opening is communicated with the two position two-way valve filler opening, and described liquid-filling valve filler opening is communicated with throttle valve, heat radiation hydraulic fluid port.
As shown in Figure 3, two are filled the hydrovalve actuator port and are respectively A1 and A2.Liquid-filling valve comprises hex head bolt 1, O shape circle 2, return spring 3, guide valve seat 4, O shape circle 5, check valve body 6, O shape circle 7.
As shown in Figure 4, liquid-filling valve return opening.Liquid-filling valve comprise hexagonal spiro plug 8, O shape circle 9, return spring 10, submissile spring abutment 11, steel ball 12, small piston rod 13, O shape circle 14, fastening axle sleeve 15, O shape circle 16, big spring seat 17, pressure adjusting spring 18, plastics fixed pin 19, pressure regulation plug screw 20, filter cleaner lining ring 21, filter cleaner 22, filter cleaner trim ring 23, valve port base 24, valve seat 25, double end plug screw 26,, O shape circle 27, seal washer 28, double end nut 29.
As shown in Figure 5, O is the liquid-filling valve return opening, and liquid-filling valve comprises piston 30, star seal ring 31, spring position limit socket 32, spring 33, O shape circle 34, plug screw 35, body 36.
Two position two-way valve filler opening oil circuit of the present invention is communicated with low pressure warning switch.Cross when low at the oil pressure of braking system, connect alarm, send the low excessively alarm of oil pressure by pressure relay SW.
The valve body material of liquid-filling valve of the present invention is spheroidal graphite cast iron QT450-10.
In the prior art, bulk material is selected HT200 for use.Among the present invention, bulk material is selected spheroidal graphite cast iron (QT450-10) for use, guarantees that mainly the special construction of product and bore area have higher hardness and improve surface roughness.
The seal ring of the sealing usefulness of liquid-filling valve of the present invention is the star seal ring, and promptly the section of described seal ring is " X " shape.
In the prior art, the design of hydraulic pressure O shape circle is unreasonable, and star seal ring (being called the X-shaped seal ring) sealing is adopted in existing improvement design, and major advantage is four lips (double-action) sealings, double-action seal element with a kind of self-tightening sealing type is applicable to the high pressure oil sealing.Compare with O-ring seals, because the star seal ring forms lubricated cavity between sealing lip, so have less surface friction drag, phenomenon is turned in turning round of having produced when effectively having avoided to-and-fro motion, thereby improves the sealability and the working life of product.
The processing method of the spool bore of liquid-filling valve of the present invention is: thick finish turning, expansion fraising, thick microhoning, roll extrusion and polishing technology.
In the prior art, the design of the processing technology of the body master cylinder spool bore of liquid-filling valve is unreasonable, and the present invention is improved to: mainly consider from the performance of product, and the one, the stability of the tolerance of size in cylinder hole is to guarantee hydraulic piston tension of engagement unanimity; The 2nd, the surface roughness in cylinder hole to guarantee the smoothness and the wear resistance of hydraulic piston motion, therefore adopts thick finish turning, expansion fraising, thick microhoning, roll extrusion and polishing technology, guarantees the hydraulic piston of product and the fit dimension in master cylinder hole, satisfies sealability.
In conjunction with the accompanying drawings the present invention has been carried out exemplary description above; obviously specific implementation of the present invention is not subjected to the restriction of aforesaid way; as long as adopted the improvement of the various unsubstantialities that method of the present invention design and technological scheme carry out; or design of the present invention and technological scheme are directly applied to other occasion without improving, all within protection scope of the present invention.
Claims (7)
1. the accumulator charging valve of an engineering machinery full power hydraulic brake system comprises that liquid-filling valve filler opening, two fill hydrovalve actuator port and liquid-filling valve return opening, and described two are filled the hydrovalve actuator port and connect with two accumulators respectively; Simultaneously, two are filled the hydrovalve actuator port and also connect with the logical hydraulic fluid port of two hydraulic pressure main valves respectively, and it is characterized in that: described liquid-filling valve is established two two position two-way valves, and each two position two-way valve oil outlet is connected with an accumulator; The connection position of described two position two-way valve is controlled by a two position two-way valve filler opening oil circuit, is communicated with two two position two-way valve filler opening oil circuits; Controlling by this two position two-way valve oil outlet of described each two position two-way valve by the position.
2. according to the accumulator charging valve of the described engineering machinery full power hydraulic brake system of claim 1, it is characterized in that: described liquid-filling valve is established the oil-feed control valve, described oil-feed control valve is a two position three-way valve, described oil-feed control valve oil outlet is communicated with described two two position two-way valve filler openings by filter cleaner, throttle valve and one-way valve, is communicated with the control return opening simultaneously with another two position three-way valve; Described oil-feed control valve filler opening is described liquid-filling valve filler opening; The return opening of described oil-feed control valve is the heat radiation hydraulic fluid port, and described heat radiation hydraulic fluid port is communicated with the hydraulic pressure radiation system; Two control ends of described oil-feed control valve are respectively input pressure control end and intermediate pressure control end.
3. according to the accumulator charging valve of the described engineering machinery full power hydraulic brake system of claim 2, it is characterized in that: described liquid-filling valve is established oil pressure adjusting valve, described oil pressure adjusting valve is the two-position three-way valve of spring reset, and the spool control end of described oil pressure adjusting valve is communicated with described two position two-way valve filler opening oil circuit; Do the time spent at described spool control end, the intermediate pressure control end of described oil-feed control valve is communicated with the liquid-filling valve return opening, and at this moment, described liquid-filling valve filler opening all is communicated with two position two-way valve filler opening and heat radiation hydraulic fluid port; When described spool control end resets, described two position two-way valve filler opening is connected with the intermediate pressure control end of described oil-feed control valve, at this moment, described liquid-filling valve filler opening is communicated with the two position two-way valve filler opening, and described liquid-filling valve filler opening is communicated with throttle valve, heat radiation hydraulic fluid port.
4. the accumulator charging valve of the engineering machinery full power hydraulic brake system of stating according to claim 1 or 2 or 3, it is characterized in that: described two position two-way valve filler opening oil circuit is communicated with low pressure warning switch.
5. according to the accumulator charging valve of claim 1 or 2 or 3 described engineering machinery full power hydraulic brake systems, it is characterized in that: the valve body material of described liquid-filling valve is spheroidal graphite cast iron QT450-10.
6. according to the accumulator charging valve of claim 1 or 2 or 3 described engineering machinery full power hydraulic brake systems, it is characterized in that: the seal ring of the sealing usefulness of described liquid-filling valve is the star seal ring, and promptly the section of described seal ring is " X " shape.
7. according to the accumulator charging valve of claim 1 or 2 or 3 described engineering machinery full power hydraulic brake systems, it is characterized in that: the processing method of the spool bore of described liquid-filling valve is: thick finish turning, expansion fraising, thick microhoning, roll extrusion and polishing technology.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010270276 CN101963164A (en) | 2010-08-30 | 2010-08-30 | Accumulator replenishing valve of full-hydraulic braking system of engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010270276 CN101963164A (en) | 2010-08-30 | 2010-08-30 | Accumulator replenishing valve of full-hydraulic braking system of engineering machinery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101963164A true CN101963164A (en) | 2011-02-02 |
Family
ID=43516178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010270276 Pending CN101963164A (en) | 2010-08-30 | 2010-08-30 | Accumulator replenishing valve of full-hydraulic braking system of engineering machinery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101963164A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104048824A (en) * | 2014-07-09 | 2014-09-17 | 安徽江淮汽车股份有限公司 | Performance testing device for driving piston oil seal of dual-clutch transmission |
| CN107725497A (en) * | 2016-08-12 | 2018-02-23 | 大连精维液压技术有限公司 | Type voltage regulation Large Copacity accumulator |
| CN107941501A (en) * | 2017-12-25 | 2018-04-20 | 芜湖盛力科技股份有限公司 | A kind of accumulator charging valve reliability test system and method |
| CN108533537A (en) * | 2018-05-11 | 2018-09-14 | 郑州宇通重工有限公司 | A kind of Full-hydraulic braking apparatus filling liquid valve group and its control system |
| CN114439802A (en) * | 2022-01-29 | 2022-05-06 | 浙江海宏液压科技股份有限公司 | Pressure control structure of prefill valve |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3918847A (en) * | 1974-02-06 | 1975-11-11 | Caterpillar Tractor Co | Accumulator charging circuit for high pressure hydraulic system |
| DE3634430A1 (en) * | 1986-10-09 | 1988-04-14 | Bosch Gmbh Robert | Accumulator loading valve |
| US5486142A (en) * | 1994-11-21 | 1996-01-23 | Martin Marietta Corporation | Hydrostatic transmission including a simplified ratio controller |
| CN2477882Y (en) * | 2001-04-29 | 2002-02-20 | 山东工程机械厂 | Multifunctional prefill valve |
| WO2006058085A2 (en) * | 2004-11-23 | 2006-06-01 | Heil Company, The | Brake energy recovery system |
| CN200988512Y (en) * | 2006-12-27 | 2007-12-12 | 江阴市卡利格机械有限公司 | Two-way driving anti-explosion diesel engine transport vehicle for coal mine |
| CN101177139A (en) * | 2007-12-10 | 2008-05-14 | 常州科研试制中心有限公司 | Bidirectional steering vehicle braking transmission system |
| CN101181896A (en) * | 2007-12-05 | 2008-05-21 | 威海广泰空港设备股份有限公司 | Electric hydraulic brake device of aircraft tractor |
| CN201228676Y (en) * | 2008-07-11 | 2009-04-29 | 三一重型装备有限公司 | Hydraulic system for electric locomotive brake |
| CN201272419Y (en) * | 2008-06-27 | 2009-07-15 | 宁波汉邦机械有限公司 | Mining anti-explosion diesel engine railless rubber-tired cart |
| CN101537810A (en) * | 2009-04-15 | 2009-09-23 | 煤炭科学研究总院太原研究院 | Coal mine underground explosion proof rubber tire transport trolley |
| JP4370096B2 (en) * | 2000-11-28 | 2009-11-25 | シェプ リミテッド | Hydraulic energy storage system |
| CN101804782A (en) * | 2010-03-24 | 2010-08-18 | 四川成都成工工程机械股份有限公司 | Novel hydraulic system of drive axle cooling system |
| CN201874905U (en) * | 2010-08-30 | 2011-06-22 | 芜湖盛力制动有限责任公司 | Accumulator charging valve for all hydraulic brake system of engineering plant |
-
2010
- 2010-08-30 CN CN 201010270276 patent/CN101963164A/en active Pending
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3918847A (en) * | 1974-02-06 | 1975-11-11 | Caterpillar Tractor Co | Accumulator charging circuit for high pressure hydraulic system |
| DE3634430A1 (en) * | 1986-10-09 | 1988-04-14 | Bosch Gmbh Robert | Accumulator loading valve |
| US5486142A (en) * | 1994-11-21 | 1996-01-23 | Martin Marietta Corporation | Hydrostatic transmission including a simplified ratio controller |
| CN1138893A (en) * | 1994-11-21 | 1996-12-25 | 马丁·马利埃塔公司 | Ratio controller for a hydrostatic transmission |
| JP4370096B2 (en) * | 2000-11-28 | 2009-11-25 | シェプ リミテッド | Hydraulic energy storage system |
| CN2477882Y (en) * | 2001-04-29 | 2002-02-20 | 山东工程机械厂 | Multifunctional prefill valve |
| WO2006058085A2 (en) * | 2004-11-23 | 2006-06-01 | Heil Company, The | Brake energy recovery system |
| CN200988512Y (en) * | 2006-12-27 | 2007-12-12 | 江阴市卡利格机械有限公司 | Two-way driving anti-explosion diesel engine transport vehicle for coal mine |
| CN101181896A (en) * | 2007-12-05 | 2008-05-21 | 威海广泰空港设备股份有限公司 | Electric hydraulic brake device of aircraft tractor |
| CN101177139A (en) * | 2007-12-10 | 2008-05-14 | 常州科研试制中心有限公司 | Bidirectional steering vehicle braking transmission system |
| CN201272419Y (en) * | 2008-06-27 | 2009-07-15 | 宁波汉邦机械有限公司 | Mining anti-explosion diesel engine railless rubber-tired cart |
| CN201228676Y (en) * | 2008-07-11 | 2009-04-29 | 三一重型装备有限公司 | Hydraulic system for electric locomotive brake |
| CN101537810A (en) * | 2009-04-15 | 2009-09-23 | 煤炭科学研究总院太原研究院 | Coal mine underground explosion proof rubber tire transport trolley |
| CN101804782A (en) * | 2010-03-24 | 2010-08-18 | 四川成都成工工程机械股份有限公司 | Novel hydraulic system of drive axle cooling system |
| CN201874905U (en) * | 2010-08-30 | 2011-06-22 | 芜湖盛力制动有限责任公司 | Accumulator charging valve for all hydraulic brake system of engineering plant |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104048824A (en) * | 2014-07-09 | 2014-09-17 | 安徽江淮汽车股份有限公司 | Performance testing device for driving piston oil seal of dual-clutch transmission |
| CN104048824B (en) * | 2014-07-09 | 2016-06-15 | 安徽江淮汽车股份有限公司 | Double; two clutch gearboxes drive piston oil seal performance test apparatus |
| CN107725497A (en) * | 2016-08-12 | 2018-02-23 | 大连精维液压技术有限公司 | Type voltage regulation Large Copacity accumulator |
| CN107725497B (en) * | 2016-08-12 | 2019-09-06 | 大连精维液压技术有限公司 | Type voltage regulation large capacity accumulator |
| CN107941501A (en) * | 2017-12-25 | 2018-04-20 | 芜湖盛力科技股份有限公司 | A kind of accumulator charging valve reliability test system and method |
| CN107941501B (en) * | 2017-12-25 | 2024-04-09 | 芜湖盛力科技股份有限公司 | Reliability test system and method for accumulator charge valve |
| CN108533537A (en) * | 2018-05-11 | 2018-09-14 | 郑州宇通重工有限公司 | A kind of Full-hydraulic braking apparatus filling liquid valve group and its control system |
| CN114439802A (en) * | 2022-01-29 | 2022-05-06 | 浙江海宏液压科技股份有限公司 | Pressure control structure of prefill valve |
| CN114439802B (en) * | 2022-01-29 | 2022-07-26 | 浙江海宏液压科技股份有限公司 | Pressure control structure of prefill valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101963164A (en) | Accumulator replenishing valve of full-hydraulic braking system of engineering machinery | |
| CN201747698U (en) | Cushioning device for hydraulic cylinder | |
| CN105003314A (en) | Rocker arm integrating engine brake | |
| CN201874905U (en) | Accumulator charging valve for all hydraulic brake system of engineering plant | |
| CN201891762U (en) | Clutch master cylinder assembly | |
| CN103133446B (en) | Valve rod of multi-path valve and multi-path valve with valve rod | |
| CN204851359U (en) | Integrated engine brake's rocking arm | |
| CN103557199B (en) | A kind of variable cross section oil hydraulic cylinder and hydraulic control system thereof and controlling method | |
| CN102235394B (en) | Integrated valve with oil circuit selection function for controlling hydraulic motor brake | |
| CN106224315A (en) | Total power self-adaptation type load-sensitive multiple directional control valve | |
| CN101934789B (en) | Hydraulic brake valve of full-hydraulic brake system in construction machinery | |
| CN201025299Y (en) | Shift operation and control valve with buffering device | |
| CN102146973A (en) | Self-regulating clearance hydraulic brake rear slave cylinder with temperature compensation function | |
| CN201866134U (en) | Pressure-regulating overflow total pump for clutch booster | |
| CN204458236U (en) | A kind of plunger piston variable hydraulic pump | |
| CN206000797U (en) | Total power self-adaptation type load-sensitive multiple directional control valve | |
| CN201769815U (en) | Hydraulic brake valve of full hydraulic brake system of engineering machinery | |
| CN203094046U (en) | Forklift and agricultural machinery brake pumps | |
| CN203172614U (en) | Hydraulic brake master pump structure of agricultural harvester | |
| CN103703266B (en) | Braking or system of connections and the method that operates this system | |
| CN213419544U (en) | Two-way hydraulic control one-way valve | |
| CN201751255U (en) | Proportional valve piston structure | |
| CN201184387Y (en) | Magnetic current change damper capable of regulating and controlling damp | |
| CN202971667U (en) | Clutch main cylinder | |
| CN204458607U (en) | Multipurpose accumulating type trimmer valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20110202 |