CN109848661A - Stirling cylic engine pressure vessel processing technology - Google Patents
Stirling cylic engine pressure vessel processing technology Download PDFInfo
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- CN109848661A CN109848661A CN201910278785.1A CN201910278785A CN109848661A CN 109848661 A CN109848661 A CN 109848661A CN 201910278785 A CN201910278785 A CN 201910278785A CN 109848661 A CN109848661 A CN 109848661A
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Abstract
The present invention relates to a kind of processing technologys of Stirling engine, especially Stirling cylic engine pressure vessel processing technology, comprising the following steps: detection part size；Clean part；Parts, and cored solder is coated when assembling at soldering；Assembled Stirling cylic engine pressure vessel is placed into vacuum brazing furnace and is brazed by vacuum brazing；Inner cavity is refined, the Stirling cylic engine pressure vessel that soldering is completed grinding machine refines inner cavity；Leak detection, to the inner cavity pressurization detection leakproofness of Stirling cylic engine pressure vessel；Detection components size.Stirling cylic engine pressure vessel processing technology provided by the invention by size detection, the cleaning of part, assembling and vacuum brazing make good weld pore-free crackle, interface cohesion, surface aesthetic, weld seam matter it is close it is bright and clean, there is no remelting phenomenon, good corrosion resistance, leakproofness height, long service life, good reliability.
Description
Technical field
The present invention relates to a kind of processing technology of Stirling engine, especially Stirling cylic engine pressure vessels to process
Technique.
Background technique
Stirling cylic engine pressure vessel is by the cold head lid of red copper, the connecting cylinder of hot head and stainless steel, flange base
Be welded into one, in working gas be with high pressure enclose easy leakage helium or hydrogen.Therefore, Stirling cycle starts
Machine pressure vessel needs the high pressure resistant, high temperature resistant of energy, and seals and to get well, and avoids gas leakage risk, can effectively ensure that engine
Reliability.
Copper cold head needs to weld with the cold head lid and connecting cylinder of stainless steel respectively, and cold head is mounted in cold head lid,
Copper hot head is welded on the other end of connecting cylinder, and the flange welding of stainless steel is in the upper of hot head.Due to being the weldering of different materials
It connects, therefore mostly uses argon arc welding welding, and argon arc welding can only be fully welded in periphery interconnected, but weld seam and fusion
Area is easy to produce crackle, and the intensity of welding cannot be met the requirements, and is easy to happen leakage at high temperature and pressure, service life is short.
Summary of the invention
To solve the above problems, the present invention, which provides one kind, can effectively improve weld strength and leakproofness, weld without gas
Hole crackle, interface cohesion are good, welding can be effectively ensured after Stirling cylic engine pressure vessel service life, high reliablity
Stirling cylic engine pressure vessel processing technology, the specific technical proposal is:
Stirling cylic engine pressure vessel processing technology, comprising the following steps:
Detect part size, the dimensional accuracy and geometric tolerance of detection cold head lid, cold head, connecting cylinder, hot head and flange seat；
Clean part, cleaning cold head lid, cold head, connecting cylinder, hot head and flange seat；Parts, assembling cold head lid, cold head, connecting cylinder,
Hot head and flange seat, and cored solder is coated when assembling at soldering；Vacuum brazing, by assembled Stirling cylic engine pressure
Power shell, which is placed into vacuum brazing furnace, to be brazed；Inner cavity is refined, the Stirling cylic engine pressure vessel that soldering is completed is used
Grinding machine refines inner cavity；Leak detection, to the inner cavity pressurization detection leakproofness of Stirling cylic engine pressure vessel；Detection components size.
By using above-mentioned technical proposal, control is carried out from the size of part first, to guarantee that the size after welding is wanted
Summation leakproofness.
By cleaning to part, make part free from admixture, and then welding quality and leakproofness after welding be effectively ensured,
Weld is avoided to be abnormal.
Vacuum brazing can be good at the welding for being applicable in different materials, is bonded in cored solder and different materials by high temperature
Reliable welding is realized together, and cored solder is easy flowing after high temperature, can effectively fill up welding gap, it is close after welding
Envelope property is good, and bonding area is big, and welding quality stable is reliable, and long service life, efficiently solves the welding range of argon arc welding
Small, the problem of being easy cracking, is gone in the small problem of the depth of weld, weld seam and fusion, and use at high temperature and pressure has been effectively ensured
Service life.
Preferably, the following steps are included: gasoline impregnates when the cold head lid, connecting cylinder and flange seat clean, by cold head lid,
Connecting cylinder and flange seat, which are placed into gasoline, to be impregnated；Ultrasonic cleaning, the cold head lid, connecting cylinder and flange seat gasoline impregnate knot
Shu Houyong ultrasonic cleaning；Sulfuric acid solution impregnates, and is dipped into sulfuric acid after the cold head lid, connecting cylinder and flange seat ultrasonic cleaning
In solution；Deionized water cleaning, the cold head lid, connecting cylinder and flange seat sulfuric acid are cleaned after impregnating with deionized water；Acetone leaching
Bubble, the cold head lid, connecting cylinder and flange seat are placed into acetone after being cleaned with deionized water to be impregnated；Drying, the cold head lid,
Drying is taken out after connecting cylinder and flange seat acetone soak.
By using above-mentioned technical proposal, gasoline can effectively remove the grease stain that process is adhered on part.
Ultrasonic cleaning removes the gasoline of piece surface, facilitates and carries out down to process.
Sulfuric acid can effectively remove the oxide layer of piece surface, prevent welding from occurring in oxide layer, influence welding quality.
Deionized water can effectively ensure that sulfuric acid, and will not chemically react in piece surface.
Acetone is dehydrated part as dehydrating agent, guarantees that part is welded with anhydrous state.
Drying is further ensured that in part it is that moisture is vaporized evaporation.
Preferably, the gasoline soaking time was at 50~70 minutes；The ultrasonic cleaning is no less than half an hour, described super
The cleaning solution that sound wave uses includes tap water and degreaser；The time that the sulfuric acid impregnates is 7~13 minutes, the matter of the sulfuric acid
Measuring concentration is 5%~15%；The time of the acetone soak is 15~30 minutes.
By using above-mentioned technical proposal, since gasoline dissolution grease stain speed is slower, it is therefore desirable to soaking time is longer, from
And the greasy dirt or grease stain of removal piece surface is effectively ensured.
Preferably, the following steps are included: gasoline impregnates when the cold head and hot head clean, cold head and hot head are placed into vapour
It is impregnated in oil；Ultrasonic cleaning, the cold head and hot head gasoline use ultrasonic cleaning after impregnating；The leaching of copper chemical polishing agent
It steeps, is dipped into copper chemical polishing agent after the cold head and hot head ultrasonic cleaning；Deionized water cleaning, the cold head and hot head
Copper chemical polishing agent is cleaned after impregnating with deionized water；After acetone soak, the cold head and hot head are cleaned with deionized water
It is placed into acetone soak；It dries, drying is taken out after the cold head and hot head acetone soak.
By using above-mentioned technical proposal, gasoline can effectively remove the grease stain that process is adhered on part.
Ultrasonic cleaning removes the gasoline of piece surface, facilitates and carries out down to process.
Copper chemical polishing agent can carry out chemical polishing to the surface of copper, remove removing oxide layer, do not influence the size of part, and
And go removing oxide layer convenient, it prevents welding from occurring in oxide layer, influences welding quality.
Deionized water can effectively ensure that sulfuric acid, and will not chemically react in piece surface.
Acetone is dehydrated part as dehydrating agent, guarantees that part is welded with anhydrous state.
Drying is further ensured that in part it is that moisture is vaporized evaporation.
Preferably, the gasoline soaking time was at 50~70 minutes；The ultrasonic cleaning is no less than half an hour, described super
The cleaning solution that sound wave uses includes tap water and degreaser；The copper chemical polishing agent soaking time is 8~12 minutes；Described third
Ketone soaking time is 15~30 minutes.
Preferably, the cored solder is BAg54CuPd.
Preferably, the following steps are included: vacuumizing when the vacuum brazing, vacuum degree is not more than 10-2Pa；Single order vacuum welding
It connects, 650 DEG C~690 DEG C is heated in 30~36 minutes, and keep the temperature 18~22 minutes；Second order vacuum welding, at 22~28 points
860 DEG C~890 DEG C are heated to from single order vacuum welding temperature in clock, and keeps the temperature 20~22 minutes；Three rank vacuum weldings, at 14 points
970 DEG C ± 10 DEG C are heated to from second order vacuum welding temperature in clock, and keeps the temperature 6 minutes；Cooling to take out, three rank vacuum weldings are completed
After cool to 200 DEG C with the furnace after take out.
By using above-mentioned technical proposal, it can get that pore-free crackle, interface cohesion be good, soldered fitting of surface aesthetic,
Weld seam matter it is close it is bright and clean, there is no remelting phenomenon, good corrosion resistance.
Preferably, the single order vacuum welding is heated to 650 DEG C~690 DEG C in 33 minutes；The second order vacuum welding
860 DEG C~890 DEG C are heated to from single order vacuum welding temperature in 25 minutes.
Preferably, when the fine grinding inner cavity, chuck clamping flange seat, Stirling cylic engine pressure vessel revolving speed 40~
75r/min；With the grinding wheel of resinoid bond, 35~50m/s of grinding wheel speed；When internal grinding length feed amount be 0.25~
0.4mm/r。
Preferably, when the leak detection detect pressure be 4MPa, pressure maintaining 20 minutes.
Compared with prior art the invention has the following advantages:
Stirling cylic engine pressure vessel processing technology provided by the invention passes through size detection, the cleaning of part, group
Dress and vacuum brazing make good weld pore-free crackle, interface cohesion, surface aesthetic, weld seam matter it is close it is bright and clean, there is no remelting phenomenon,
Good corrosion resistance, leakproofness height, long service life, good reliability.
Specific embodiment
It is existing that the invention will be further described.
Cold head lid is 0Cr18Ni9, i.e. stainless steel.Cold head is T3 red copper.Connecting cylinder is stainless steel.Hot head is red copper.Method
Blue seat is stainless steel.
Stirling cylic engine pressure vessel processing technology, comprising the following steps:
Part size is detected, the dimensional accuracy and geometric tolerance of cold head lid, cold head, connecting cylinder, hot head and flange seat are detected,
Gap when part size at each soldering is detected simultaneously in 0.03~0.12mm, guarantees that cored solder can normally circulate and size essence
Degree；
Clean part, cleaning cold head lid, cold head, connecting cylinder, hot head and flange seat；
Parts, assembling cold head lid, cold head, connecting cylinder, hot head and flange seat, and soldering is coated when assembling at soldering
Material, cored solder BAg54CuPd；
Assembled Stirling cylic engine pressure vessel is placed into vacuum brazing furnace and is brazed by vacuum brazing；
Inner cavity is refined, the Stirling cylic engine pressure vessel that soldering is completed grinding machine refines inner cavity；
Leak detection, to the inner cavity pressurization detection leakproofness of Stirling cylic engine pressure vessel；
Detection components size.
Control is carried out from the size of part first, to guarantee size requirement and leakproofness after welding.
By cleaning to part, make part free from admixture, and then welding quality and leakproofness after welding be effectively ensured,
Weld is avoided to be abnormal.
Vacuum brazing can be good at the welding for being applicable in different materials, is bonded in cored solder and different materials by high temperature
Reliable welding is realized together, and cored solder is easy flowing after high temperature, can effectively fill up welding gap, it is close after welding
Envelope property is good, and bonding area is big, and welding quality stable is reliable, and long service life, efficiently solves the welding range of argon arc welding
Small, the problem of being easy cracking, is gone in the small problem of the depth of weld, weld seam and fusion, and use at high temperature and pressure has been effectively ensured
Service life.
Specifically, when cold head lid, connecting cylinder and flange seat clean the following steps are included:
Gasoline impregnates, and cold head lid, connecting cylinder and flange seat are placed into gasoline and impregnated, and soaking time is 1 in the oil
Hour；
Ultrasonic cleaning, cold head lid, connecting cylinder and flange seat gasoline use ultrasonic cleaning, ultrasonic cleaning after impregnating
Half an hour, the cleaning solution that ultrasonic wave uses includes tap water and degreaser；
Sulfuric acid solution impregnates, and is dipped into sulfuric acid solution after cold head lid, connecting cylinder and flange seat ultrasonic cleaning, sulfuric acid leaching
Bubble 10 minutes, the mass concentration of sulfuric acid are 5%~15%；
Deionized water cleaning, cold head lid, connecting cylinder and flange seat sulfuric acid are cleaned after impregnating with deionized water；
Acetone soak, cold head lid, connecting cylinder and flange seat are placed into acetone after being cleaned with deionized water to be impregnated, acetone leaching
The time of bubble is 15~30 minutes；
It dries, drying is taken out after cold head lid, connecting cylinder and flange seat acetone soak.
Gasoline can effectively remove the grease stain that process is adhered on part.Since gasoline dissolution grease stain speed is slower,
Therefore need soaking time longer, so that the greasy dirt or grease stain of removal piece surface be effectively ensured.
Ultrasonic cleaning removes the gasoline of piece surface, facilitates and carries out down to process.
Sulfuric acid can effectively remove the oxide layer of piece surface, prevent welding from occurring in oxide layer, influence welding quality.
Deionized water can effectively ensure that sulfuric acid, and will not chemically react in piece surface.
Acetone is dehydrated part as dehydrating agent, guarantees that part is welded with anhydrous state.
Drying is further ensured that in part it is that moisture is vaporized evaporation.
When cold head and hot head clean the following steps are included:
Gasoline impregnates, and cold head and hot head are placed into gasoline and are impregnated, and gasoline impregnates 1 hour；
Ultrasonic cleaning, cold head and hot head gasoline use ultrasonic cleaning, ultrasonic cleaning half an hour, ultrasound after impregnating
The cleaning solution that wave uses includes tap water and degreaser；
Copper chemical polishing agent impregnates, and is dipped into copper chemical polishing agent after cold head and hot head ultrasonic cleaning, and copper chemistry is thrown
Photo etching soaking time is 10 minutes；
Deionized water cleaning, cold head and hot head copper chemical polishing agent are cleaned after impregnating with deionized water；
Acetone soak, cold head and hot head are placed into acetone soak after being cleaned with deionized water, and the acetone soak time is 15~
30 minutes；
It dries, drying is taken out after cold head and hot head acetone soak.
Gasoline can effectively remove the grease stain that process is adhered on part.
Ultrasonic cleaning removes the gasoline of piece surface, facilitates and carries out down to process.
Copper chemical polishing agent can carry out chemical polishing to the surface of copper, remove removing oxide layer, do not influence the size of part, and
And go removing oxide layer convenient, it prevents welding from occurring in oxide layer, influences welding quality.
Deionized water can effectively ensure that sulfuric acid, and will not chemically react in piece surface.
Acetone is dehydrated part as dehydrating agent, guarantees that part is welded with anhydrous state.
Drying is further ensured that in part it is that moisture is vaporized evaporation.
When vacuum brazing the following steps are included:
It vacuumizes, vacuum degree is not more than 10-2Pa；
Single order vacuum welding is heated to 650 DEG C~690 DEG C in 33 minutes, and keeps the temperature 18~22 minutes；
Second order vacuum welding is heated to 860 DEG C~890 DEG C from single order vacuum welding temperature in 25 minutes, and keeps the temperature 20
~22 minutes；
Three rank vacuum weldings are heated to 970 DEG C ± 10 DEG C from second order vacuum welding temperature in 14 minutes, and keep the temperature 6 points
Clock；
It is cooling to take out, it is taken out after cooling to 200 DEG C with the furnace after the completion of three rank vacuum weldings.
Can get that pore-free crackle, interface cohesion be good, soldered fitting of surface aesthetic, weld seam matter it is close it is bright and clean, there is no remelting
Phenomenon, good corrosion resistance.
When refining inner cavity, chuck clamps flange seat, 40~75r/min of Stirling cylic engine pressure vessel revolving speed；With tree
The grinding wheel of rouge bonding agent, 35~50m/s of grinding wheel speed；Length feed amount is 0.25~0.4mm/r when internal grinding.Make after fine grinding
Meet requirement.
It is 4MPa that pressure is detected when leak detection, pressure maintaining 20 minutes, cannot there is leakage.
Claims (10)
1. Stirling cylic engine pressure vessel processing technology, which comprises the following steps:
Detect part size, the dimensional accuracy and geometric tolerance of detection cold head lid, cold head, connecting cylinder, hot head and flange seat；
Clean part, cleaning cold head lid, cold head, connecting cylinder, hot head and flange seat；
Parts, assembling cold head lid, cold head, connecting cylinder, hot head and flange seat, and cored solder is coated when assembling at soldering；
Assembled Stirling cylic engine pressure vessel is placed into vacuum brazing furnace and is brazed by vacuum brazing；
Inner cavity is refined, the Stirling cylic engine pressure vessel that soldering is completed grinding machine refines inner cavity；
Leak detection, to the inner cavity pressurization detection leakproofness of Stirling cylic engine pressure vessel；
Detection components size.
2. Stirling cylic engine pressure vessel processing technology according to claim 1, which is characterized in that the cold head
When lid, connecting cylinder and flange seat clean the following steps are included:
Gasoline impregnates, and cold head lid, connecting cylinder and flange seat are placed into gasoline and impregnated；
Ultrasonic cleaning, the cold head lid, connecting cylinder and flange seat gasoline use ultrasonic cleaning after impregnating；
Sulfuric acid solution impregnates, and is dipped into sulfuric acid solution after the cold head lid, connecting cylinder and flange seat ultrasonic cleaning；
Deionized water cleaning, the cold head lid, connecting cylinder and flange seat sulfuric acid are cleaned after impregnating with deionized water；
Acetone soak, the cold head lid, connecting cylinder and flange seat are placed into acetone after being cleaned with deionized water to be impregnated；
It dries, drying is taken out after the cold head lid, connecting cylinder and flange seat acetone soak.
3. Stirling cylic engine pressure vessel processing technology according to claim 2, which is characterized in that the gasoline leaching
The time is steeped at 50~70 minutes；
The ultrasonic cleaning is no less than half an hour, and the cleaning solution that the ultrasonic wave uses includes tap water and degreaser；
The time that the sulfuric acid impregnates is 7~13 minutes；
The time of the acetone soak is 15~30 minutes.
4. Stirling cylic engine pressure vessel processing technology according to claim 1, which is characterized in that the cold head and
Hot head clean when the following steps are included:
Gasoline impregnates, and cold head and hot head are placed into gasoline and are impregnated；
Ultrasonic cleaning, the cold head and hot head gasoline use ultrasonic cleaning after impregnating；
Copper chemical polishing agent impregnates, and is dipped into copper chemical polishing agent after the cold head and hot head ultrasonic cleaning；
Deionized water cleaning, the cold head and hot head copper chemical polishing agent are cleaned after impregnating with deionized water；
Acetone soak, the cold head and hot head are placed into acetone soak after being cleaned with deionized water；
It dries, drying is taken out after the cold head and hot head acetone soak.
5. Stirling cylic engine pressure vessel processing technology according to claim 4, which is characterized in that the gasoline leaching
The time is steeped at 50~70 minutes；
The ultrasonic cleaning is no less than half an hour, and the cleaning solution that the ultrasonic wave uses includes tap water and degreaser；
The copper chemical polishing agent soaking time is 8~12 minutes；
The acetone soak time is 15~30 minutes.
6. Stirling cylic engine pressure vessel processing technology according to claim 1, which is characterized in that the cored solder
For BAg54CuPd.
7. Stirling cylic engine pressure vessel processing technology according to claim 1, which is characterized in that the vacuum pricker
When weldering the following steps are included:
It vacuumizes, vacuum degree is not more than 10-2Pa；
Single order vacuum welding is heated to 650 DEG C~690 DEG C in 30~36 minutes, and keeps the temperature 18~22 minutes；
Second order vacuum welding is heated to 860 DEG C~890 DEG C from single order vacuum welding temperature in 22~28 minutes, and keeps the temperature 20
~22 minutes；
Three rank vacuum weldings are heated to 970 DEG C ± 10 DEG C from second order vacuum welding temperature in 14 minutes, and keep the temperature 6 minutes；
It is cooling to take out, it is taken out after cooling to 200 DEG C with the furnace after the completion of three rank vacuum weldings.
8. Stirling cylic engine pressure vessel processing technology according to claim 7, which is characterized in that the single order is true
Sky, which was welded in 33 minutes, is heated to 650 DEG C~690 DEG C；
The second order vacuum welding was heated to 860 DEG C~890 DEG C from single order vacuum welding temperature in 25 minutes.
9. Stirling cylic engine pressure vessel processing technology according to claim 1, which is characterized in that in the fine grinding
When chamber, chuck clamps flange seat, 40~75r/min of Stirling cylic engine pressure vessel revolving speed；With the grinding wheel of resinoid bond,
35~50m/s of grinding wheel speed；Length feed amount is 0.25~0.4mm/r when internal grinding.
10. Stirling cylic engine pressure vessel processing technology according to claim 1, which is characterized in that the leak detection
When detection pressure be 4MPa, pressure maintaining 20 minutes.
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Cited By (3)
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| CN111250811A (en) * | 2020-03-05 | 2020-06-09 | 山东伟瑞制冷科技有限公司 | Flat tube brazing material soaking and coating process and device |
| CN112629055A (en) * | 2020-12-22 | 2021-04-09 | 宁波芯斯特林低温设备有限公司 | Split type shell of Stirling refrigerator and machining method thereof |
| CN117571222A (en) * | 2024-01-16 | 2024-02-20 | 山东科沃泽机械科技有限公司 | Air tightness testing device for rear axle transmission shell of tractor |
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| CN112629055A (en) * | 2020-12-22 | 2021-04-09 | 宁波芯斯特林低温设备有限公司 | Split type shell of Stirling refrigerator and machining method thereof |
| CN117571222A (en) * | 2024-01-16 | 2024-02-20 | 山东科沃泽机械科技有限公司 | Air tightness testing device for rear axle transmission shell of tractor |
| CN117571222B (en) * | 2024-01-16 | 2024-04-09 | 山东科沃泽机械科技有限公司 | Air tightness testing device for rear axle transmission shell of tractor |
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