CN101216056A - Large journey low-temperature extension hydraulic cylinder manufacture method - Google Patents
Large journey low-temperature extension hydraulic cylinder manufacture method Download PDFInfo
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- CN101216056A CN101216056A CNA2007101729907A CN200710172990A CN101216056A CN 101216056 A CN101216056 A CN 101216056A CN A2007101729907 A CNA2007101729907 A CN A2007101729907A CN 200710172990 A CN200710172990 A CN 200710172990A CN 101216056 A CN101216056 A CN 101216056A
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Abstract
The invention relates to the technology for manufacturing a hydraulic cylinder, in particular to a method for manufacturing a large-stroke low temperature stretching hydraulic cylinder. The large-stroke low temperature stretching hydraulic cylinder is used on an oil well rig or a service machine working in cold areas and is used for stretching of a nesting headframe. In the technological process of the invention, low temperature resistant alloy structural steel is selected to be blanked and machined into components; the components are conventionally heated; a low temperature process is adopted to weld, connect and assemble the components; low temperature resistant sealing elements are arranged in the four sealed grooves of a piston. In this way, the large-stroke low temperature stretching hydraulic cylinder is manufactured. The large-stroke low temperature stretching hydraulic cylinder manufactured through the method has good low temperature property; the performance of the welds and the heat-affected zones of the cylinder tube and a piston rod reaches the following indices: Sigma b is more than or equal to 410MPa; Delta s is more than or equal to 20 percent; Akv (-45 DEG C) is more than or equal to 27J; the large-stroke low temperature stretching hydraulic cylinder can meet the requirements for intensity, toughness, rigidity and elasticity under low temperature (-45 DEG C), and works reliably with high sealing performance.
Description
Technical field
The present invention relates to the oil hydraulic cylinder manufacturing technology, particularly a kind of large journey low-temperature extension hydraulic cylinder manufacture method.Large journey low-temperature extension hydraulic cylinder is matched at the oil-well rig of cold area operation or well repairing machine, is used for the flexible of suit derrick.
Background technique
In the prior art, conventional derrick is flexible only to be applicable to that with big stroke telescopic hydraulic cylinder ambient temperature is-18～40 ℃ of scopes, if use under low temperature (45 ℃) situation, oil hydraulic cylinder just might leakage of oil or fracture.Reason has following two aspects: on the one hand, the derrick telescopic hydraulic cylinder is not because the butt joint assembly welding technique of the material of its cylinder barrel, cylinder bar and cylinder barrel, cylinder bar satisfies desired intensity, toughness and stretchability requirement under low temperature (45 ℃) situation.On the other hand, the operating temperature of derrick telescopic hydraulic cylinder Sealing is-30～+ 100 ℃, if use under-45 ℃ of ambient temperatures, because relaxation procedure sharply slows down, friction increases in hardness, modulus and the molecule, and elasticity significantly reduces, cause the ability to work of Sealing to descend, cause oil hydraulic cylinder to leak.And big stroke telescopic hydraulic cylinder length when derrick stretches out operation reaches about 30 meters, makes to change that hydraulic cylinder sealing element is very time-consuming takes a lot of work.There are many drawbacks when therefore, the big stroke telescopic hydraulic cylinder of prior art is applied to low-temperature cold environment (45 ℃).
Summary of the invention
The purpose of this invention is to provide a kind of large journey low-temperature extension hydraulic cylinder manufacture method, make the large journey low-temperature extension hydraulic cylinder of making by this method, the normal of suit derrick that can satisfy low temperature oil-well rig or well repairing machine under low temperature (45 ℃) environment when using stretches, can satisfy intensity, toughness, rigidity and stretchability requirement, safe and reliable, have good sealing effect.
The technological scheme that the present invention takes is: a kind of large journey low-temperature extension hydraulic cylinder manufacture method, this large journey low-temperature derrick telescopic hydraulic cylinder adopts single-acting piston type, by the piston club head, piston rod, at the bottom of the piston rod bar, piston, cylinder barrel, gland, cylinder bottom, Sealing between piston and the cylinder barrel is formed, cylinder barrel is made of with the steel pipe welding of docking the reinforcing overcoat of steel tubular, the two ends of cylinder barrel are connected with cylinder barrel joint and adpting flange respectively, piston rod constitutes the welding of steel pipe-rods tube by two joints, four road sealed grooves are arranged on the piston, be respectively charged into wear-resisting band, combination seal, Yx Sealing and O RunddichtringO, be used for the sealing between piston and the cylinder barrel, it is characterized in that, make by the following method:
(1) select low temperature resistant Alloy Constructional Steel blanking for use, at the bottom of piston club head, each part of piston rod, piston rod bar are made in machining, piston, gland, each part of cylinder barrel, cylinder bottom, inter process is heat-treated by the conventional heat treatment process of normalizing+tempering+inferior temperature normalizing;
(2) the reinforcing overcoat with steel tubular is enclosed within two sections cylinder barrel steel pipe joints that will dock, and two sections steel pipe interfaces is aligned fit closely, and reinforcement of weld overcoat and two sections steel pipes weld cylinder barrel joint and adpting flange respectively at the cylinder barrel two ends respectively, and cylinder barrel survives;
(3) two joints with piston rod weld with the steel pipe-rods tube that will be connected respectively, be connected by thread spindle and tapped hole between two joints, with welding with the two ends of piston rod respectively at the bottom of piston club head, the piston rod bar, piston is connected with screw with at the bottom of the piston rod bar;
(4) gland is threaded with cylinder barrel, cylinder bottom is connected with the cylinder barrel screw;
(5) following low-temperature welding technology welding is adopted in above-mentioned all welding:
Adopt carbon dioxide gas arc welding, select gas shielded arc welding low temperature electrode wire for use, welding parameter is: gage of wire: φ 1.0～φ 1.2mm, electric current (A): 150～180, arc voltage (V): 21～26, welding speed (mm/min): 100～200, polarity: dc reverse connection, adopt weld preheating, preheating temperature (℃): 200～250, postweld heat preservation 1～4 hour;
(6) with assembly welding and at the bottom of the piston club head after connecting, piston rod, piston rod bar, piston packs in the cylinder barrel, is respectively charged into Yx Sealing, O RunddichtringO and combination seal that wear-resisting band and low temperature resistant acrylonitrile butadiene rubber modified material are made in four road sealed grooves of piston.
In the above-mentioned large journey low-temperature extension hydraulic cylinder manufacture method, described low temperature resistant Alloy Constructional Steel is Alloy Constructional Steel 27SiMn and Fine Steel Casting iron 35CrMo, the butt joint steel pipe to extension bar tube and cylinder barrel of piston rod is selected Alloy Constructional Steel 27SiMn cold-drawn Precision Seamless Steel Tubes for use, and all the other each machined piece are selected Fine Steel Casting iron 35CrMo for use; In the described low-temperature welding technology, it is ER50-G gas shielded arc welding electrode wire that gas shielded arc welding low temperature electrode wire is selected the GB model for use, gage of wire: φ 1.2mm, postweld heat preservation 2 hours.
The present invention adopts cryogenic material to make each part of large journey low-temperature extension hydraulic cylinder, after heat treatment has good low-temperature flexibility, weld seam and heat affected zone have good cryogenic property after welding, and the weld seam of cylinder barrel, piston rod and the performance of heat affected zone reach following index: σ b 〉=410MPa, δ s 〉=20%, Akv (45 ℃) 〉=27J; In four road sealed grooves of piston, be respectively charged into low temperature resistant Sealing, be used for the sealing between piston and the cylinder barrel, use the large journey low-temperature extension hydraulic cylinder of the inventive method manufacturing can satisfy intensity, toughness, rigidity and stretchability requirement under low temperature (45 ℃) situation, safe and reliable, have good sealing effect.
Description of drawings
Fig. 1 is the structural representation of large journey low-temperature extension hydraulic cylinder.
Fig. 2 is a cylinder barrel docking structure schematic representation.
Fig. 3 is a piston rod docking structure schematic representation.
Fig. 4 is cylinder base structure and piston sealing structure schematic representation.
Embodiment
Shown in Figure 1 is to be the flexible supporting large journey low-temperature extension hydraulic cylinder structural representation of 2000 meters sledge dress rigs, two joint suit derricks, and its requirement is had: be used under low temperature (45 ℃) situation, piston stroke length requires 14.8 meters.Large journey low-temperature extension hydraulic cylinder by piston club head 1, piston rod 2, piston rod bar at the bottom of 3, piston 4, cylinder barrel 5, gland 6, cylinder bottom 7, air relief cock 8 etc. form.3 insert respectively in piston rod 2 holes made from steel pipe butt joint and integrally welded at the bottom of piston club head 1 and the piston rod bar, and 3 are connected with piston 4 usefulness screws at the bottom of the piston rod bar, and piston club head 1 has an oil inlet and outlet.The low temperature resistant cold-drawn Precision Seamless Steel Tubes butt joint of cylinder barrel 5 usefulness is made.Gland 6 is threaded with cylinder barrel 5 for the flange of the band dust ring end cap that is threaded, and cylinder bottom 7 is connected with cylinder barrel 5 with screw for band seal ring flange end cap.
As shown in Figure 2, cylinder barrel 5 is made by two sections low temperature resistant cold-drawn Precision Seamless Steel Tubess 51 and 52 butt joint assembly weldings, and the reinforcing overcoat 53 by steel tubular is enclosed within steel pipe 51 and 52 jointings, and with steel pipe 51 and 52 welding.Be welded with the joint 54 and the adpting flange 55 of tapped hole at the two ends of cylinder barrel 5 respectively, be respectively applied for and be threaded with gland shown in Figure 16 and be connected with cylinder bottom 7 screws.
As shown in Figure 3, piston rod 2 is formed by connecting by two sections bar tubes 21,22, bar tube 21,22 is made by low temperature resistant cold-drawn Precision Seamless Steel Tubes, joint 23 1 ends are tenons, the other end is threaded axle, and joint 24 1 ends are tenons, and the other end is tapped hole, joint 23 is connected with 24 screw-thread fit, and joint 23 and 24 tenons, one end be insertion rod tube 21 and the 22 interior and welding of bar tube respectively.
As shown in Figure 4, be cylinder base structure and piston sealing structure schematic representation, sealing between piston 4 and the cylinder barrel 5 is adopted multi-stage sealed, on piston Design and Machining four road sealed grooves, be respectively charged into wear-resisting with 41 and low temperature resistant Y
XSeal ring 43, O RunddichtringO 44, combination seal 42 Sealings.
Referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4, the manufacture method of the large journey low-temperature extension hydraulic cylinder of said structure is as follows:
(1) selects Alloy Constructional Steel 27SiMn and Fine Steel Casting iron 35CrMo blanking for use, piston club head 1 is made in machining, piston rod 2 each part, at the bottom of the piston rod bar 3, piston 4, cylinder barrel 5 each part, gland 6, cylinder bottom 7, piston rod 2 each component parts comprise the bar tube 21 that will connect, 22 and joint 23,24, cylinder barrel 5 each component parts comprise reinforces overcoat 53, the steel pipe 51 that connects, 52, joint 54, adpting flange 55, piston rod 2 wherein to extension bar tube 21,22 and the butt joint steel pipe 51 of cylinder barrel 5,52 select Alloy Constructional Steel 27SiMn cold-drawn Precision Seamless Steel Tubes for use, and all the other each parts are selected Fine Steel Casting iron 35CrMo for use.Inter process carries out conventional heat treatment, and heat treatment process is: Alloy Constructional Steel 27SiMn is 920 ℃ of normalizings, 650 ℃ of tempering, 800 ℃ of Asia temperature normalizings; Fine Steel Casting iron 35CrMo is 860 ℃ of quenchings, 650 ℃ of tempering, 790 ℃ of oil of quenching, 580 ℃ of tempering.
(2) the reinforcing overcoat 53 of steel tubular is enclosed within two sections steel pipes 51 that will dock and 52 jointing, two sections steel pipe interfaces are aligned fit closely, respectively reinforcement of weld overcoat 53 and two sections steel pipes 51 and 52 weld cylinder barrel joint 54 and adpting flange 55 respectively at cylinder barrel 5 two ends, and cylinder barrel 5 survives.
(3) two joints 23,24 with piston rod 2 weld with the bar tube 21,22 that will be connected respectively, be connected by thread spindle on it and tapped hole between two joints 23,24, with at the bottom of piston club head 1, the piston rod bar 3 respectively with the welding of the two ends of piston rod 2, piston 4 is connected with 3 usefulness screws at the bottom of the piston rod bar.
(4) gland 6 is threaded with cylinder barrel 5, cylinder bottom 7 is connected with cylinder barrel 5 screws.
(5) following low-temperature welding technology welding is adopted in above-mentioned all welding:
Adopt carbon dioxide gas arc welding, adopting the GB model is ER50-G gas shielded arc welding electrode wire.Welding parameter is: gage of wire: φ 1.2mm, and electric current (A): 150～180, arc voltage (V): 21～26, welding speed (mm/min): 100～200, polarity: dc reverse connection.Adopt weld preheating, preheating temperature (℃): 200～250, postweld heat preservation 2 hours.
(6) with assembly welding and at the bottom of the piston club head 1 after connecting, piston rod 2, piston rod bar 3, piston 4 packs in the cylinder barrel 5, is respectively charged into wear-resisting with 41 and the acrylonitrile butadiene rubber modified material of low temperature resistant (45 ℃) Yx Sealing 43, O RunddichtringO 44 and the combination seal 42 made in four road sealed grooves of piston 4.
Claims (2)
1. large journey low-temperature extension hydraulic cylinder manufacture method, this large journey low-temperature derrick telescopic hydraulic cylinder adopts single-acting piston type, by the piston club head, piston rod, at the bottom of the piston rod bar, piston, cylinder barrel, gland, cylinder bottom, Sealing between piston and the cylinder barrel is formed, cylinder barrel is made of with the steel pipe welding of docking the reinforcing overcoat of steel tubular, the two ends of cylinder barrel are connected with cylinder barrel joint and adpting flange respectively, piston rod constitutes the welding of steel pipe-rods tube by two joints, four road sealed grooves are arranged on the piston, be respectively charged into wear-resisting band, combination seal, Yx Sealing and O RunddichtringO, be used for the sealing between piston and the cylinder barrel, it is characterized in that: make by the following method:
(1) select low temperature resistant Alloy Constructional Steel blanking for use, at the bottom of piston club head, each part of piston rod, piston rod bar are made in machining, piston, gland, each part of cylinder barrel, cylinder bottom, inter process is heat-treated by the conventional heat treatment process of normalizing+tempering+inferior temperature normalizing;
(2) the reinforcing overcoat with steel tubular is enclosed within two sections steel pipe joints that will dock, and two sections steel pipe interfaces is aligned fit closely, and reinforcement of weld overcoat and two sections steel pipes weld cylinder barrel joint and adpting flange respectively at the cylinder barrel two ends respectively, and cylinder barrel survives;
(3) two joints with piston rod weld with the steel pipe-rods tube that will be connected respectively, be connected by thread spindle and tapped hole between two joints, with welding with the two ends of piston rod respectively at the bottom of piston club head, the piston rod bar, piston is connected with screw with at the bottom of the piston rod bar;
(4) gland is threaded with cylinder barrel, cylinder bottom is connected with the cylinder barrel screw;
(5) following low-temperature welding technology welding is adopted in above-mentioned all welding:
Adopt carbon dioxide gas arc welding, select gas shielded arc welding low temperature electrode wire for use, welding parameter is: gage of wire: φ 1.0～φ 1.2mm, electric current (A): 150～180, arc voltage (V): 21～26, welding speed (mm/min): 100～200, polarity: dc reverse connection, adopt weld preheating, preheating temperature (℃): 200～250, postweld heat preservation 1～4 hour;
(6) with assembly welding and at the bottom of the piston club head after connecting, piston rod, piston rod bar, piston packs in the cylinder barrel, is respectively charged into Yx Sealing, O RunddichtringO and combination seal that wear-resisting band and low temperature resistant acrylonitrile butadiene rubber modified material are made in four road sealed grooves of piston.
2. large journey low-temperature extension hydraulic cylinder manufacture method according to claim 1, it is characterized in that: described low temperature resistant Alloy Constructional Steel is Alloy Constructional Steel 27SiMn and Fine Steel Casting iron 35CrMo, the butt joint steel pipe to extension bar tube and cylinder barrel of piston rod is selected Alloy Constructional Steel 27SiMn cold-drawn Precision Seamless Steel Tubes for use, and all the other each machined piece are selected Fine Steel Casting iron 35CrMo for use; In the described low-temperature welding technology, it is ER50-G gas shielded arc welding electrode wire that gas shielded arc welding low temperature electrode wire is selected the GB model for use, gage of wire: φ 1.2mm, postweld heat preservation 2 hours.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2007101729907A CN101216056A (en) | 2007-12-26 | 2007-12-26 | Large journey low-temperature extension hydraulic cylinder manufacture method |
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| CNA2007101729907A CN101216056A (en) | 2007-12-26 | 2007-12-26 | Large journey low-temperature extension hydraulic cylinder manufacture method |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101941112A (en) * | 2010-09-20 | 2011-01-12 | 中煤邯郸煤矿机械有限责任公司 | Automatic wielding technology of narrow gap MAG of hydraulic cylinder body |
| CN101758362B (en) * | 2008-11-25 | 2011-06-15 | 上海宝钢设备检修有限公司 | Repairing method of master cylinder plunger piston of radial forging machine |
| CN102501026A (en) * | 2011-11-18 | 2012-06-20 | 江苏武进液压启闭机有限公司 | Manufacturing method for piston rod wrapped by stainless steel plate |
| CN102513665A (en) * | 2011-12-09 | 2012-06-27 | 南车眉山车辆有限公司 | Method for welding joints of composite tube |
| CN104373416A (en) * | 2014-10-27 | 2015-02-25 | 安徽安簧机械股份有限公司 | Hydraulic cylinder of steering axle of industrial vehicle and manufacturing technology thereof |
| CN105366039A (en) * | 2014-08-07 | 2016-03-02 | 空中客车营运有限公司 | Landing gear drive system |
| CN107511566A (en) * | 2017-10-24 | 2017-12-26 | 徐州市华圆机械厂 | A kind of welding method for being heat-treated destressing |
| CN108557053A (en) * | 2018-02-05 | 2018-09-21 | 叶哲企 | A kind of telescopic device of unmanned plane horn |
| CN109278974A (en) * | 2018-10-31 | 2019-01-29 | 上海歌尔泰克机器人有限公司 | Horn structure and unmanned plane |
| US10421535B2 (en) | 2013-09-18 | 2019-09-24 | Airbus Operations Limited | Drive system for aircraft landing gear |
| CN113714733A (en) * | 2021-05-28 | 2021-11-30 | 中铁七局集团电务工程有限公司 | Production process of high-sealing pneumatic tension compensation device |
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2007
- 2007-12-26 CN CNA2007101729907A patent/CN101216056A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101758362B (en) * | 2008-11-25 | 2011-06-15 | 上海宝钢设备检修有限公司 | Repairing method of master cylinder plunger piston of radial forging machine |
| CN101941112B (en) * | 2010-09-20 | 2012-09-26 | 中煤邯郸煤矿机械有限责任公司 | Automatic wielding technology of narrow gap MAG of hydraulic cylinder body |
| CN101941112A (en) * | 2010-09-20 | 2011-01-12 | 中煤邯郸煤矿机械有限责任公司 | Automatic wielding technology of narrow gap MAG of hydraulic cylinder body |
| CN102501026A (en) * | 2011-11-18 | 2012-06-20 | 江苏武进液压启闭机有限公司 | Manufacturing method for piston rod wrapped by stainless steel plate |
| CN102513665A (en) * | 2011-12-09 | 2012-06-27 | 南车眉山车辆有限公司 | Method for welding joints of composite tube |
| US10421535B2 (en) | 2013-09-18 | 2019-09-24 | Airbus Operations Limited | Drive system for aircraft landing gear |
| US10435141B2 (en) | 2013-09-18 | 2019-10-08 | Airbus Operations Limited | Drive system for aircraft landing gear |
| CN105366039A (en) * | 2014-08-07 | 2016-03-02 | 空中客车营运有限公司 | Landing gear drive system |
| US10329012B2 (en) | 2014-08-07 | 2019-06-25 | Airbus Operations Limited | Landing gear drive system |
| US11524771B2 (en) | 2014-08-07 | 2022-12-13 | Airbus Operations Limited | Landing gear drive system |
| CN104373416A (en) * | 2014-10-27 | 2015-02-25 | 安徽安簧机械股份有限公司 | Hydraulic cylinder of steering axle of industrial vehicle and manufacturing technology thereof |
| CN107511566A (en) * | 2017-10-24 | 2017-12-26 | 徐州市华圆机械厂 | A kind of welding method for being heat-treated destressing |
| CN108557053A (en) * | 2018-02-05 | 2018-09-21 | 叶哲企 | A kind of telescopic device of unmanned plane horn |
| CN109278974A (en) * | 2018-10-31 | 2019-01-29 | 上海歌尔泰克机器人有限公司 | Horn structure and unmanned plane |
| CN113714733A (en) * | 2021-05-28 | 2021-11-30 | 中铁七局集团电务工程有限公司 | Production process of high-sealing pneumatic tension compensation device |
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Open date: 20080709 |