CN109630483B - Mining dump truck energy accumulator provided with piston sealing device - Google Patents
Mining dump truck energy accumulator provided with piston sealing device Download PDFInfo
- Publication number
- CN109630483B CN109630483B CN201811569609.5A CN201811569609A CN109630483B CN 109630483 B CN109630483 B CN 109630483B CN 201811569609 A CN201811569609 A CN 201811569609A CN 109630483 B CN109630483 B CN 109630483B
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- CN
- China
- Prior art keywords
- piston
- counter bore
- unloading
- ring groove
- top cover
- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/04—Accumulators
- F15B1/08—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
- F15B1/24—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with rigid separating means, e.g. pistons
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1447—Pistons; Piston to piston rod assemblies
- F15B15/1452—Piston sealings
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
Abstract
The invention discloses a mining dump truck energy accumulator provided with a piston sealing device, which comprises: the cylinder barrel, the piston, the top cover and the bottom cover are respectively connected to the top and the bottom of the cylinder barrel, and the piston is arranged in the cylinder barrel; the side wall of the piston is provided with three piston ring grooves, a bidirectional piston seal is arranged in each piston ring groove, and an unloading device is arranged on the piston between every two groups of piston seals. The invention has simple structure, convenient control and good sealing performance, and can meet the requirement of the mining truck on the dynamic load.
Description
Technical Field
The invention relates to an off-highway mining dump truck, in particular to a mining dump truck energy accumulator provided with a piston sealing device.
Background
The off-highway mining dump truck (hereinafter referred to as a mining truck) often runs on a mine with more curves and slopes, the mining truck must have reliable and flexible steering and braking performances, the steering and braking energy accumulator of the mining truck is required to have excellent dynamic stability performance, and the sealing device commonly adopted by the mining truck energy accumulator piston in the market at present has the structure that: a bidirectional piston sealing ring is arranged between the cylinder barrel and the piston, and two unidirectional piston seals are added, or a bidirectional piston sealing ring and a wear-resisting ring are added. The sealing form is easy to leak, so that the reliability of the energy accumulator is reduced, the steering stability and the braking stability of the vehicle are further affected, and the service lives of all parts of the hydraulic system are also reduced.
Disclosure of Invention
The invention solves the technical problem of providing the mining dump truck energy accumulator with the piston sealing device, which has the advantages of simple structure, convenient control and good sealing performance, and can meet the dynamic load of the mining dump truck.
The technical proposal is as follows:
the mining dump truck energy accumulator comprises a piston, wherein the side wall of the piston is provided with at least two groups of piston ring grooves, and a bidirectional piston seal is arranged in each piston ring groove; the unloading device has the structure that: the screw is axially provided with a through hole; the soft spring and the steel ball are positioned between the screw and the O-shaped ring, and the soft spring is positioned between the screw and the steel ball; the piston is provided with a first counter bore and a second counter bore at the upper part, and a first unloading ring groove is arranged on the side wall; the opening of the first counter bore is positioned at the upper part of the piston, the first counter bore is communicated with the second counter bore, the second counter bore is positioned at the lower part of the first counter bore, and the inner diameter of the second counter bore is smaller than that of the first counter bore; the first connecting channel is connected between the second counter bore and the first unloading ring groove; the lower part of the piston is provided with a third counter bore and a fourth counter bore, and the side wall of the piston is provided with a second unloading ring groove; the opening of the third counter bore is positioned at the lower part of the piston, the third counter bore is communicated with the fourth counter bore, the fourth counter bore is positioned at the upper part of the third counter bore, and the inner diameter of the fourth counter bore is smaller than that of the third counter bore; the second connecting channel is connected between the fourth counter bore and the second unloading ring groove; the unloading device includes: a first unloading device and a second unloading device; the first unloading device is installed in the first counter bore, and the second unloading device is installed in the third counter bore.
Further, internal threads are arranged in the first counter bore and the third counter bore, and two screws are respectively connected with the two internal threads.
Further, three groups of piston ring grooves are formed in the side wall of the piston, and a first unloading device is arranged between the two piston seals at the upper part of the piston and is used for eliminating the trapping phenomenon between the two piston seals at the upper part of the piston; the second unloading device is arranged between the two piston seals at the lower part of the piston and is used for eliminating the trapping phenomenon between the two piston seals at the lower part of the piston.
Further, the method further comprises the following steps: the cylinder barrel 1, the top cover 3 and the bottom cover 4 are respectively connected to the top and the bottom of the cylinder barrel, and the piston is arranged in the cylinder barrel.
Further, the upper part of the piston is filled with nitrogen, and the lower part of the piston is filled with hydraulic oil.
Further, the top cover is connected to the upper part of the cylinder barrel in a threaded connection mode; the side wall of the top cover is provided with a top cover ring groove, and a top cover sealing ring is arranged in the top cover ring groove; the top cover is provided with an inflation through hole, an air valve is installed on the inflation through hole, connecting threaded counter bores are formed in two sides of the inflation through hole, connecting bolts are installed in the connecting threaded counter bores, and the air valve protection cover is fixed on the upper portion of the air valve.
Further, the bottom is connected to the lower part of the cylinder barrel in a threaded connection mode, an oil hole is formed in the bottom, a bottom ring groove is formed in the side wall of the bottom, and a bottom sealing ring is arranged in the bottom ring groove.
Further, the inner wall of the oil hole is provided with a connecting internal thread, and the inflation through hole is connected with the air valve in a threaded mode.
The technical effects of the invention include:
the invention has simple structure, convenient control and good sealing performance, can meet the dynamic load of the mining vehicle, greatly improves the stability and reliability of the off-highway mining vehicle accumulator, and better ensures the braking and steering reliability of the mining dump truck. According to the invention, two bidirectional piston seals are additionally arranged between the cylinder barrel and the piston of the energy accumulator, so that the sealing performance of the energy accumulator under dynamic load is improved, and reliable guarantee is provided for braking and steering of the mining vehicle; an unloading device is arranged between the two bidirectional piston seals, so that the generation of trapped pressure is avoided. The novel piston sealing device is used, so that the sealing performance of the energy accumulator is met, and the reliability of the energy accumulator is improved.
Drawings
FIG. 1 is a schematic diagram of a mining dump truck accumulator provided with a piston seal in the present invention;
fig. 2 is an enlarged view of a portion of the unloader of fig. 1.
Detailed Description
The following description fully illustrates the specific embodiments of the invention to enable those skilled in the art to practice and reproduce it.
FIG. 1 is a schematic diagram of a mining dump truck accumulator with a piston seal assembly according to the present invention; as shown in fig. 2, an enlarged view of a portion of the unloader of fig. 1.
The structure of the mining dump truck energy accumulator provided with the piston sealing device comprises: the cylinder barrel 1, the piston 2, the top cover 3 and the bottom cover 4 are respectively connected to the top and the bottom of the cylinder barrel 1, and the piston 2 is arranged in the cylinder barrel 1. The upper part of the piston 2 is filled with dry nitrogen 5, and hydraulic oil 6 flows in and out of the lower part of the piston 2 when the accumulator works.
The top cover 3 is connected to the upper part of the cylinder barrel 1 in a threaded connection mode; the side wall of the top cover 3 is provided with a top cover ring groove, and a top cover sealing ring 31 is arranged in the top cover ring groove; the top cover 3 is provided with an inflation through hole 32, an air valve 33 is arranged on the inflation through hole 32, connecting threaded counter bores are arranged on two sides of the inflation through hole 32, connecting bolts are arranged in the connecting threaded counter bores, and an air valve protection cover 34 is connected to the upper portion of the air valve 33 through the connecting bolts. The connection between the air charging through hole 32 and the air valve 33 adopts a threaded connection mode.
The bottom cover 4 is coupled to the lower portion of the cylinder tube 1 by screw coupling, and the bottom cover 4 is provided with an oil hole 42. The bottom cover 4 has a bottom cover ring groove formed in a side wall, and a bottom cover seal ring 41 is installed in the bottom cover ring groove. The inner wall of the oil hole 41 is provided with a connecting female screw.
Three piston ring grooves are formed in the side wall of the piston 2, two-way piston seals 21 are arranged in the piston ring grooves, and unloading devices are arranged on the piston 2 between every two groups of piston seals 3. The unloading device has the structure that: screw 24, soft spring 25, steel ball 26 and O-ring 27. The screw 24 is axially provided with a through hole.
The unloading device includes: a first unloading device 22 and a second unloading device 23.
The first unloading device 22 is arranged between the two piston seals 21 at the upper part of the piston 2, and is used for eliminating the trapping phenomenon between the two piston seals 21 at the upper part of the piston 2. The upper part of the piston 2 is provided with a first counter bore and a second counter bore, and the side wall of the piston is provided with a first unloading ring groove; the opening of the first counter bore is positioned at the upper part of the piston 2, the first counter bore is communicated with the second counter bore, the second counter bore is positioned at the lower part of the first counter bore, and the inner diameter of the second counter bore is smaller than that of the first counter bore; the first connecting channel is connected between the second counter bore and the first unloading ring groove; the first counter bore is provided with an internal thread, and a screw 24, a soft spring 25, a steel ball 26 and an O-shaped ring 27 are installed in the first counter bore, the soft spring 25 and the steel ball 26 are located between the screw 24 and the O-shaped ring 27, and the soft spring 25 is located between the screw 24 and the steel ball 26. When the nitrogen 5 is accumulated between the two piston seals 21 at the upper part of the piston 2, the pressure trapping phenomenon occurs if the nitrogen is not led out, and the nitrogen 5 enters the first connecting channel from the first unloading ring groove; because the pressure of the nitrogen 5 stored in the first unloading ring is greater than the pressure of the nitrogen 5 at the upper part of the piston 2, the steel ball 26 can be jacked up after the nitrogen 5 enters the second counter bore, the nitrogen 5 enters the first counter bore, and reenters the upper space of the piston 2 through the through hole of the screw 24, so that the trapping pressure phenomenon is eliminated. When the trapping pressure is removed, the steel ball 26 is again pressed against the O-ring 27 under the pressure of the soft spring 25, closing the channel.
The second unloading device 23 is arranged between the two piston seals 21 at the lower part of the piston 2, and is used for eliminating the trapping phenomenon between the two piston seals 21 at the lower part of the piston 2. The lower part of the piston 2 is provided with a third counter bore and a fourth counter bore, and the side wall of the piston is provided with a second unloading ring groove; the opening of the third counter bore is positioned at the lower part of the piston 2, the third counter bore is communicated with a fourth counter bore, the fourth counter bore is positioned at the upper part of the third counter bore, and the inner diameter of the fourth counter bore is smaller than that of the third counter bore; the second connecting channel is connected between the fourth counter bore and the second unloading ring groove; the third counter bore is provided with internal threads, and screw 24, soft spring 25, steel ball 26 and O-ring 27 are installed in the third counter bore, and soft spring 25, steel ball 26 are located between screw 24, O-ring 27, and soft spring 25 is located between screw 24, steel ball 26. When the hydraulic oil 6 is stored between the two piston seals 21 at the lower part of the piston 2, a trapping phenomenon occurs if the hydraulic oil is not led out, and the hydraulic oil 6 enters the second connecting channel from the second unloading ring groove; because the pressure of the hydraulic oil 6 stored in the second unloading ring groove is larger than the pressure of the hydraulic oil 6 at the lower part of the piston 2, the steel ball 26 can be jacked up after the hydraulic oil 6 enters the fourth counter bore through the second connecting channel, the hydraulic oil 6 enters the third counter bore, and reenters the lower space of the piston 2 through the through hole of the screw 24, so that the trapping pressure phenomenon is eliminated. When the trapping pressure is removed, the steel ball 26 is again pressed against the O-ring 27 under the pressure of the soft spring 25, closing the channel.
When the vehicle starts, the lower part of the energy accumulator is filled with hydraulic oil 6, so that the energy stored by the energy accumulator exists in the form of compressed nitrogen 5, and the energy accumulator is separated from an air cavity and an oil cavity by a piston 2. When the mining vehicle turns or brakes, the energy accumulator is used for supplying oil. The three groups of bidirectional piston seals 21 between the cylinder barrel 4 and the piston 2 play a role in triple sealing, can effectively reduce leakage and greatly improve the reliability of the energy accumulator. However, because the pressure trapping phenomenon is easy to occur between the two groups of bidirectional piston seals 21, an unloading device is arranged in the middle of the two groups of bidirectional piston seals, and the pressure trapping phenomenon is effectively solved.
The terminology used herein is for the purpose of description and illustration only and is not intended to be limiting. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.
Claims (4)
1. The mining dump truck energy accumulator with the piston sealing device comprises a piston, and is characterized in that at least two groups of piston ring grooves are formed in the side wall of the piston, and a bidirectional piston seal is arranged in each piston ring groove; the unloading device has the structure that: the screw is axially provided with a through hole; the soft spring and the steel ball are positioned between the screw and the O-shaped ring, and the soft spring is positioned between the screw and the steel ball; the piston is provided with a first counter bore and a second counter bore at the upper part, and a first unloading ring groove is arranged on the side wall; the opening of the first counter bore is positioned at the upper part of the piston, the first counter bore is communicated with the second counter bore, the second counter bore is positioned at the lower part of the first counter bore, and the inner diameter of the second counter bore is smaller than that of the first counter bore; the first connecting channel is connected between the second counter bore and the first unloading ring groove; the piston is provided with a third counter bore and a fourth counter bore at the lower part, a second unloading ring groove is arranged on the side wall, three groups of piston ring grooves are arranged on the side wall of the piston, and a first unloading device is arranged between two piston seals at the upper part of the piston and is used for eliminating the trapping phenomenon between the two piston seals at the upper part of the piston; the second unloading device is arranged between the two piston seals at the lower part of the piston and is used for eliminating the trapping phenomenon between the two piston seals at the lower part of the piston; the opening of the third counter bore is positioned at the lower part of the piston, the third counter bore is communicated with the fourth counter bore, the fourth counter bore is positioned at the upper part of the third counter bore, and the inner diameter of the fourth counter bore is smaller than that of the third counter bore; the second connecting channel is connected between the fourth counter bore and the second unloading ring groove; the unloading device includes: a first unloading device and a second unloading device; the first unloading device is arranged in the first counter bore, and the second unloading device is arranged in the third counter bore; further comprises: the cylinder barrel, the top cover and the bottom cover are respectively connected to the top and the bottom of the cylinder barrel, and the piston is arranged in the cylinder barrel; the top cover is connected to the upper part of the cylinder barrel in a threaded connection mode, a top cover ring groove is formed in the side wall of the top cover, and a top cover sealing ring is arranged in the top cover ring groove; the top cover is provided with an inflation through hole, an air valve is arranged on the inflation through hole, connecting threaded counter bores are arranged on two sides of the inflation through hole, connecting bolts are arranged in the connecting threaded counter bores, and the air valve protection cover is fixed on the upper part of the air valve; the bottom cover is connected to the lower part of the cylinder barrel in a threaded connection mode, the bottom cover is provided with an oil hole, a bottom cover annular groove is formed in the side wall of the bottom cover, and a bottom cover sealing ring is arranged in the bottom cover annular groove.
2. The mining dump truck energy accumulator provided with the piston sealing device according to claim 1, wherein the first counter bore and the third counter bore are internally provided with internal threads, and two screws are respectively connected with the two internal threads.
3. The mining dump truck accumulator provided with the piston sealing device according to claim 1, wherein the upper portion of the piston is filled with nitrogen gas, and the lower portion of the piston is filled with hydraulic oil.
4. The mining dump truck accumulator provided with the piston sealing device according to claim 1, wherein the inner wall of the oil hole is provided with connecting internal threads, and the air charging through hole is connected with the air valve in a threaded manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811569609.5A CN109630483B (en) | 2018-12-21 | 2018-12-21 | Mining dump truck energy accumulator provided with piston sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811569609.5A CN109630483B (en) | 2018-12-21 | 2018-12-21 | Mining dump truck energy accumulator provided with piston sealing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109630483A CN109630483A (en) | 2019-04-16 |
| CN109630483B true CN109630483B (en) | 2023-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811569609.5A Active CN109630483B (en) | 2018-12-21 | 2018-12-21 | Mining dump truck energy accumulator provided with piston sealing device |
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| CN (1) | CN109630483B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115711304B (en) * | 2023-01-06 | 2023-04-28 | 蓝帕控制阀门(江苏)有限公司 | Pneumatic V-shaped ball valve |
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|---|---|---|---|---|
| CN1888453A (en) * | 2006-07-12 | 2007-01-03 | 三一重工股份有限公司 | Piston type energy accumulator |
| CN201520331U (en) * | 2009-11-26 | 2010-07-07 | 湘电重型装备股份有限公司 | Large tonnage mining dumper steering power cylinder |
| CN103644236A (en) * | 2013-12-02 | 2014-03-19 | 湘电重型装备有限公司 | Front axle oil-gas suspension device for electric wheel dump truck |
| CN104179872A (en) * | 2014-07-24 | 2014-12-03 | 三一矿机有限公司 | Variable damping oil-gas suspension cylinder and mining dump truck thereof |
| CN106704290A (en) * | 2015-11-13 | 2017-05-24 | 湖北佳恒科技有限公司 | Telescopic sleeve hydraulic cylinder unloading device of mining dump vehicle |
| CN206563008U (en) * | 2017-02-28 | 2017-10-17 | 曲靖师范学院 | A kind of piston accumulator easily started up |
| CN207315774U (en) * | 2017-10-10 | 2018-05-04 | 成都弗格森液压机电有限公司 | A kind of long-life oil cylinder piston double containment protective device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103994163A (en) * | 2014-05-20 | 2014-08-20 | 山东海工机械有限公司 | Hydraulic anti-lock brake wheel cylinder and braking system |
-
2018
- 2018-12-21 CN CN201811569609.5A patent/CN109630483B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1888453A (en) * | 2006-07-12 | 2007-01-03 | 三一重工股份有限公司 | Piston type energy accumulator |
| CN201520331U (en) * | 2009-11-26 | 2010-07-07 | 湘电重型装备股份有限公司 | Large tonnage mining dumper steering power cylinder |
| CN103644236A (en) * | 2013-12-02 | 2014-03-19 | 湘电重型装备有限公司 | Front axle oil-gas suspension device for electric wheel dump truck |
| CN104179872A (en) * | 2014-07-24 | 2014-12-03 | 三一矿机有限公司 | Variable damping oil-gas suspension cylinder and mining dump truck thereof |
| CN106704290A (en) * | 2015-11-13 | 2017-05-24 | 湖北佳恒科技有限公司 | Telescopic sleeve hydraulic cylinder unloading device of mining dump vehicle |
| CN206563008U (en) * | 2017-02-28 | 2017-10-17 | 曲靖师范学院 | A kind of piston accumulator easily started up |
| CN207315774U (en) * | 2017-10-10 | 2018-05-04 | 成都弗格森液压机电有限公司 | A kind of long-life oil cylinder piston double containment protective device |
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| CN109630483A (en) | 2019-04-16 |
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