Shanghai Daoqin Plastics Co., Ltd.

machine liquid pressure system can positive as, remove system combined design, parts manufacturing quality and use and other conditions outer, liquid pressure has suitable property degree is 一 十 separation important factors. liquid pressure as is liquid pressure 传动 工 as 介质, remove can amount, also has lubricated parts 运动部位 保护 metal by and other function. especially is currently liquid pressure technology toward high pressure, formed, small type development, add upper electronics technology application, for liquid pressure system as has can property, degree, stability property and lifespan 提出 愈灭愈 high high requirements, therefore, injection molding machine liquid pressure system selection property can good, tool has relatively high degree liquid pressure use 油. 　 has material statistics 显示: has ultra- 70% liquid pressure system fault/failure is due to liquid pressure selection combined or use, tube/pipe 不善, make liquid pressure to 污染造 formed. therefore, must understanding liquid pressure system for use various requirements, combined selection, positive in 维护保 tube/pipe, can ensure liquid pressure system positive 常运行, less fault/failure, improve/increase production efficiency.

一, liquid pressure requirements and selection

　　1, liquid pressure basic requirements

（1） viscosity combined 适, tool has relatively good viscous temperature features. liquid pressure viscosity large, system pressure loss large, efficiency reduce, and abrasion loss increase, reduce use lifespan; if liquid pressure viscosity small, system easy 泄漏, system efficiency reduce, therefore, liquid pressure viscosity need selection combined 理, need large need small. liquid pressure viscosity temperature degree 变化而变化, temperature degree rise high 时, liquid pressure viscosity decline. liquid viscosity temperature degree 变化而变化 property can viscous temperature features, commonly used viscosity table/sheet 示. viscosity 指数越 high, liquid viscous temperature features good, temperature degree 变化时, viscosity relatively small. liquid pressure viscosity generally high 于90.

（2） in as temperature degree and pressure lower, tool has good lubricated property, stability property and 一定 油 film strong/high degree. liquid pressure system as device parts is need generate scratch and abrasion loss, machine 停止, 启动时, scratch force relatively large, 启动时摩 scratch force is most large, easy abrasion loss. therefore, liquid pressure need tool has good lubricated property, for 运动部 parts to lubricated function, to decrease/reduce abrasion loss, long use lifespan 目. in high temperature, high pressure, high speed conditions lower as liquid pressure system, more requirements liquid pressure need tool has good lubricated property, is has high film strong/high degree, wear resistance need good. liquid pressure in through 一 阀口, small 孔时, need strong/high 烈 剪切 function, in 此情况 lower, relatively large separation fracture, formed relatively small separation 子, formed liquid viscosity reduce, reduce to 一定程 degree 时, liquid pressure 油就不 can again use, therefore, liquid pressure tool has relatively good resistant stability property.

（3） tool has relatively good resistant oxidation property. liquid pressure system as has relatively high pressure and temperature degree, need liquid pressure in conditions lower 不变质 aging, 不析出沥青, and other 胶质沉淀.

（4） need tool has good property. liquid pressure in mixed has gas is very has 害, in system as generate function, formed impact 波, this type of impact force and impact as used for solid 体壁面 upper, generate gas function, make device parts loss bad. another, bubbles pressure speed pressure shrink, generate local high temperature （据计算, can 达几百 degree above ）, will add fast liquid hot separation understanding, and oxidation, make liquid 变质, 变黑.

（5） anti property can need good.

（6） in pressure lower, pressure shrink rate need small.

（7） 燃点, flash point need high, property need small.

（8） 不含 water and its it 杂质.

（9） for 密封材 material effect/influence need small. this type of effect/influence has: 1） make 密封材 material generate solvent understanding, large, soft 化; 2） make 密封材 material hard 化.

2, liquid pressure selection

　　　　 in liquid pressure system in, force parts --- liquid pressure types type, is selection liquid pressure main/primary for 象. generally 说, 首先　泵 各 type, suitable viscosity scope/range, again specific liquid pressure product types grade. injection molding machine recommendation use resistant abrasion liquid pressure 油. 北方 区 gas temperature relatively low 时, can using/adopting low temperature liquid pressure 油, lower table/sheet 1 is different temperature degree lower types liquid pressure use viscosity scope/range.



table/sheet 1　　　几 types liquid pressure use viscosity recommendation value （ｍｍ2/S）

50℃运动 viscosity 40℃运动 viscosity

工 as temperature degree (℃)5～40 40～80 5～40 40～80

gears 泵 17～40 63～88 23～68 105～150

轴 toward 柱塞泵 25～44 40～98 40～73 68～170

径 toward 柱塞泵 17～62 37～154 23～103 60～255

叶 sheet/slice 泵7Mpa above 17～29 25～44 23～45 40～73

7Mpa below/following 31～40 37～54 50～68 60～86



selection liquid pressure selection relatively good liquid pressure 油, although one-time property relatively large, excellent use lifespan long, for liquid pressure liquid pressure 油, to liquid pressure system belt/tape loss 害, 结果往往 is 不偿失.

二, liquid pressure use

1, 污染程 degree 测定

has conditions lower, can use various device testing liquid pressure 油 污染程 degree; in production 现场, 往往没 has 专门 仪 device testing liquid pressure 油受污染 程 degree, large more use 眼看, methods 直接观察 liquid pressure 油 污染程 degree. generally 人 眼睛 can degree is 40UM, therefore, upper very 脏 油实际 upper already 经污染 relatively is heavy, lower table/sheet 2 is liquid pressure 油污染 目测 project and 判断, measures.



table/sheet 2　　 liquid pressure 油污染 目测, and measures

appearance color odor 污染情况 处理 measures

color transparent positive 常 良 good use

transparent, already positive mixed types liquid viscosity, combined requirements, use

变 formed white positive mixed gas and water separation separation water separation, separation or full 部换油

变 formed color has oxidation full 部换油

transparent has small black spots positive mixed 入杂质 滤 rear use or 换油

transparent light positive mixed metal powder 未 滤 or 换油, 并检查 causes



2, liquid pressure 油污染 control method

（1） 滤 method. research table/sheet 明, for liquid pressure system most large is solid pellets property 污染, use suitable device tool is control and decrease light this type of 污染 良 good method, can ensure liquid pressure 油 污染程 degree low system device parts can water 平. attention/notes: make is new 油, need rear use.

（2） ensure liquid pressure temperature degree high. liquid pressure temperature ultra- 55℃时, liquid pressure oxidation add 剧. temperature ultra- 55℃ rear, temperature degree upper rise 10℃ left right, liquid pressure use lifespan need shrink short semi, therefore, control temperature is anti liquid pressure oxidation important step/link. generally can using/adopting add large 油箱容 amount, use suitable cooling device, ensure cooling water ring methods add control temperature, 应急时 also can use 风扇吹 cold.

（3） control 污染特侵入. 1）严格检验元 parts 污 染程 degree, outer parts 运输, tube/pipe process in need injection molding 密封, anti 止污染; assembly front, is new also is rear heavy 装, has parts true 清洗, device parts housing/shell inner type 砂, 毛刺务必清 remove, need attention/notes device parts inner 腔死角处 iron and other remove. 2） add strong/high for liquid pressure tube/pipe 理, liquid pressure 油进厂时应抽样检验, combined rear can again add 入油箱 or 密封储存. 定期检查 in use liquid pressure 油. 3）定期检查, pipeline, and 滤网. 4） maintain as ring and assembly, 检修工 tool and add tool 清洁, can 立即修复 parts need attention/notes 密封, anti will material belt/tape liquid pressure parts and system in. 5）发现 liquid pressure 油污染严 heavy 时, remove and remove outer, also 应查明受污染 causes.

三, commonly used Domestic abrasion liquid pressure main/primary property can indicators and inner outer type product Comparison Table

injection molding machine more using/adopting sheet/slice 泵, as pressure in 7Mｐａ above, recommendation use 46号 resistant resistant abrasion liquid pressure 油, lower table/sheet 3 is Domestic resistant abrasion liquid pressure main/primary property can indicators. lower table/sheet 4 is inner outer type product Comparison Table.



table/sheet 3　　 Domestic resistant abrasion liquid pressure main/primary property can indicators

ISO viscosity and other grade viscosity (40℃)cst viscosity flash point (开口) ℃ 倾点℃ FZG through grade

32 28.8～35.2 ≥95 ≥180 ≤-15 10

46 41.1～50.6 ≥95 ≥200 ≤-15 10

68 61.2～74.8 ≥95 ≥200 ≤-15 10

100 90.0～110 ≥95 ≥200 ≤-15 10
Domestic resistant abrasion liquid pressure main/primary property can indicators 　 ISO viscosity and other grade viscosity (40℃) 　cst viscosity 指数 　 flash point (开口) ℃ 倾点℃ 　 FZG through grade 　 32 28.8-35.2 　≥95 　≥180 ≤-15 10 46 41.1-50.6 　≥95 　≥200 ≤-15 10 68 61.2-74.8 　≥95 　≥200 ≤-15 10 100 90.0-110 　≥95 　≥200 ≤-15 10P class=f14 style="LINE-HEIGHT: 190%">　　 machine liquid pressure system can positive as, remove system combined design, parts manufacturing quality and use and other conditions outer, liquid pressure has suitable property degree is 一 十 separation important factors. liquid pressure as is liquid pressure 传动 工 as 介质, remove can amount, also has lubricated parts 运动部位 保护 metal by and other function. especially is currently liquid pressure technology toward high pressure, formed, small type development, add upper electronics technology application, for liquid pressure system as has can property, degree, stability property and lifespan 提出 愈灭愈 high high requirements, therefore, injection molding machine liquid pressure system selection property can good, tool has relatively high degree liquid pressure use 油. 　 has material statistics 显示: has ultra- 70％ liquid pressure system fault/failure is due to liquid pressure selection combined or use, tube/pipe 不善, make liquid pressure to 污染造 formed. therefore, must understanding liquid pressure system for use various requirements, combined selection, positive in 维护保 tube/pipe, can ensure liquid pressure system positive 常运行, less fault/failure, improve/increase production efficiency. 　一, liquid pressure requirements and selection 　　1, liquid pressure basic requirements 　（1） viscosity combined 适, tool has relatively good viscous temperature features. liquid pressure viscosity large, system pressure loss large, efficiency reduce, and abrasion loss increase, reduce use lifespan; if liquid pressure viscosity small, system easy 泄漏, system efficiency reduce, therefore, liquid pressure viscosity need selection combined 理, need large need small. liquid pressure viscosity temperature degree 变化而变化, temperature degree rise high 时, liquid pressure viscosity decline. liquid viscosity temperature degree 变化而变化 property can viscous temperature features, commonly used viscosity table/sheet 示. viscosity 指数越 high, liquid viscous temperature features good, temperature degree 变化时, viscosity relatively small. liquid pressure viscosity generally high 于90. 　（2） in as temperature degree and pressure lower, tool has good lubricated property, stability property and 一定 油 film strong/high degree. liquid pressure system as device parts is need generate scratch and abrasion loss, machine 停止, 启动时, scratch force relatively large, 启动时摩 scratch force is most large, easy abrasion loss. therefore, liquid pressure need tool has good lubricated property, for 运动部 parts to lubricated function, to decrease/reduce abrasion loss, long use lifespan 目. in high temperature, high pressure, high speed conditions lower as liquid pressure system, more requirements liquid pressure need tool has good lubricated property, is has high film strong/high degree, wear resistance need good. liquid pressure
machine liquid pressure system can positive as, remove system combined design, parts manufacturing quality and use and other conditions outer, liquid pressure has suitable property degree is 一 十 separation important factors. liquid pressure as is liquid pressure 传动 工 as 介质, remove can amount, also has lubricated parts 运动部位 保护 metal by and other function. especially is currently liquid pressure technology toward high pressure, formed, small type development, add upper electronics technology application, for liquid pressure system as has can property, degree, stability property and lifespan 提出 愈灭愈 high high requirements, therefore, injection molding machine liquid pressure system selection property can good, tool has relatively high degree liquid pressure use 油. 　 has material statistics 显示: has ultra- 70％ liquid pressure system fault/failure is due to liquid pressure selection combined or use, tube/pipe 不善, make liquid pressure to 污染造 formed. therefore, must understanding liquid pressure system for use various requirements, combined selection, positive in 维护保 tube/pipe, can ensure liquid pressure system positive 常运行, less fault/failure, improve/increase production efficiency. 　一, liquid pressure requirements and selection 　　1, liquid pressure basic requirements 　（1） viscosity combined 适, tool has relatively good viscous temperature features. liquid pressure viscosity large, system pressure loss large, efficiency reduce, and abrasion loss increase, reduce use lifespan; if liquid pressure viscosity small, system easy 泄漏, system efficiency reduce, therefore, liquid pressure viscosity need selection combined 理, need large need small. liquid pressure viscosity temperature degree 变化而变化, temperature degree rise high 时, liquid pressure viscosity decline. liquid viscosity temperature degree 变化而变化 property can viscous temperature features, commonly used viscosity table/sheet 示. viscosity 指数越 high, liquid viscous temperature features good, temperature degree 变化时, viscosity relatively small. liquid pressure viscosity generally high 于90. 　（2） in as temperature degree and pressure lower, tool has good lubricated property, stability property and 一定 油 film strong/high degree. liquid pressure system as device parts is need generate scratch and abrasion loss, machine 停止, 启动时, scratch force relatively large, 启动时摩 scratch force is most large, easy abrasion loss. therefore, liquid pressure need tool has good lubricated property, for 运动部 parts to lubricated function, to decrease/reduce abrasion loss, long use lifespan 目. in high temperature, high pressure, high speed conditions lower as liquid pressure system, more requirements liquid pressure need tool has good lubricated property, is has high film strong/high degree, wear resistance need good. liquid pressure in through 一 阀口, small 孔时, need strong/high 烈 剪切 function, in 此情况 lower, relatively large separation fracture, formed relatively small separation 子, formed liquid viscosity reduce, reduce to 一定程 degree 时, liquid pressure 油就不 can again use, therefore, liquid pressure tool has relatively good resistant stability property. 　（3） tool has relatively good resistant oxidation property. liquid pressure system as has relatively high pressure and temperature degree, need liquid pressure in conditions lower 不变质 aging, 不析出沥青, and other 胶质沉淀. 　（4） need tool has good property. liquid pressure in mixed has gas is very has 害, in system as generate function, formed impact 波, this type of impact force and impact as used for solid 体壁面 upper, generate gas function, make device parts loss bad. another, bubbles pressure speed pressure shrink, generate local high temperature （据计算, can 达几百 degree above ）, will add fast liquid hot separation understanding, and oxidation, make liquid 变质, 变黑. 　（5） anti property can need good. 　（6） in pressure lower, pressure shrink rate need small. 　（7） 燃点, flash point need high, property need small. 　（8） 不含 water and its it 杂质. 　（9） for 密封材 material effect/influence need small. this type of effect/influence has: 1） make 密封材 material generate solvent understanding, large, soft 化; 2） make 密封材 material hard 化. 　2, liquid pressure selection 　　　　 in liquid pressure system in, force parts --- liquid pressure types type, is selection liquid pressure main/primary for 象. generally 说, 首先　泵 各 type, suitable viscosity scope/range, again specific liquid pressure product types grade. injection molding machine recommendation use resistant abrasion liquid pressure 油. 北方 区 gas temperature relatively low 时, can using/adopting low temperature liquid pressure 油, lower table/sheet 1 is different temperature degree lower types liquid pressure use viscosity scope/range. 　　几 types liquid pressure use viscosity recommendation value （ｍｍ2/S）　　　　　　　　　　　　 50℃运动 viscosity 　40℃运动 viscosity 　工 as temperature degree (℃)5～40 40～80 5～40 40～80　 gears 泵　　　　17～40 63～88 23～68 105～150　轴 toward 柱塞泵 25～44 40～98 40～73 68～170　径 toward 柱塞泵 17～62 37～154 23～103 60～255　叶 sheet/slice 泵7Mpa above 17～29 25～44 23～45 40～73　　　　　 7Mpa below/following 31～40 37～54 50～68 60～86　　 selection liquid pressure selection relatively good liquid pressure 油, although one-time property relatively large, excellent use lifespan long, for liquid pressure liquid pressure 油, to liquid pressure system belt/tape loss 害, 结果往往 is 不偿失. 　二, liquid pressure use 　1, 污染程 degree 测定　 has conditions lower, can use various device testing liquid pressure 油 污染程 degree; in production 现场, 往往没 has 专门 仪 device testing liquid pressure 油受污染 程 degree, large more use 眼看, methods 直接观察 liquid pressure 油 污染程 degree. generally 人 眼睛 can degree is 40UM, therefore, upper very 脏 油实际 upper already 经污染 relatively is heavy, lower table/sheet 2 is liquid pressure 油污染 目测 project and 判断, measures. 　　 liquid pressure 油污染 目测, and measures 　 appearance color odor 污染情况 处理 measures 　 color transparent positive 常 良 good use 　 transparent, already positive mixed types liquid viscosity, combined requirements, use 　变 formed white positive mixed gas and water separation separation water separation, separation or full 部换油　变 formed color has oxidation full 部换油　 transparent has small black spots positive mixed 入杂质 滤 rear use or 换油　 transparent light positive mixed metal powder 未 滤 or 换油, 并检查 causes 　　2, liquid pressure 油污染 control method 　（1） 滤 method. research table/sheet 明, for liquid pressure system most large is solid pellets property 污染, use suitable device tool is control and decrease light this type of 污染 良 good method, can ensure liquid pressure 油 污染程 degree low system device parts can water 平. attention/notes: make is new 油, need rear use. 　（2） ensure liquid pressure temperature degree high. liquid pressure temperature ultra- 55℃时, liquid pressure oxidation add 剧. temperature ultra- 55℃ rear, temperature degree upper rise 10℃ left right, liquid pressure use lifespan need shrink short semi, therefore, control temperature is anti liquid pressure oxidation important step/link. generally can using/adopting add large 油箱容 amount, use suitable cooling device, ensure cooling water ring methods add control temperature, 应急时 also can use 风扇吹 cold. 　（3） control 污染特侵入. 1）严格检验元 parts 污 染程 degree, outer parts 运输, tube/pipe process in need injection molding 密封, anti 止污染; assembly front, is new also is rear heavy 装, has parts true 清洗, device parts housing/shell inner type 砂, 毛刺务必清 remove, need attention/notes device parts inner 腔死角处 iron and other remove. 2） add strong/high for liquid pressure tube/pipe 理, liquid pressure 油进厂时应抽样检验, combined rear can again add 入油箱 or 密封储存. 定期检查 in use liquid pressure 油. 3）定期检查, pipeline, and 滤网. 4） maintain as ring and assembly, 检修工 tool and add tool 清洁, can 立即修复 parts need attention/notes 密封, anti will material belt/tape liquid pressure parts and system in. 5）发现 liquid pressure 油污染严 heavy 时, remove and remove outer, also 应查明受污染 causes. 　三, commonly used Domestic abrasion liquid pressure main/primary property can indicators and inner outer type product Comparison Table 　 injection molding machine more using/adopting sheet/slice 泵, as pressure in 7Mｐａ above, recommendation use 46号 resistant resistant abrasion liquid pressure 油, lower table/sheet 3 is Domestic resistant abrasion liquid pressure main/primary property can indicators. lower table/sheet 4 is inner outer type product Comparison Table.