JPH047A - Device for supplying contaminant mixed oil - Google Patents
Device for supplying contaminant mixed oilInfo
- Publication number
- JPH047A JPH047A JP10265290A JP10265290A JPH047A JP H047 A JPH047 A JP H047A JP 10265290 A JP10265290 A JP 10265290A JP 10265290 A JP10265290 A JP 10265290A JP H047 A JPH047 A JP H047A
- Authority
- JP
- Japan
- Prior art keywords
- contaminant
- oil
- mixed oil
- circuit
- switching valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000356 contaminant Substances 0.000 title claims abstract description 57
- 239000003344 environmental pollutant Substances 0.000 claims description 33
- 231100000719 pollutant Toxicity 0.000 claims description 33
- 230000002542 deteriorative effect Effects 0.000 abstract description 2
- 238000000926 separation method Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 156
- 238000010586 diagram Methods 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012886 linear function Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野コ
本発明は、油圧機器の性能試験、耐久試験等を行う際に
用いられる汚染物質混合油供給装置に閏する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a contaminant-mixed oil supply device used when performing performance tests, durability tests, etc. of hydraulic equipment.
［従来の技術］
建設機械をはじめ各種機械装置、車両等に使用される油
圧機器の性能や耐久性を確認する場合、清浄油を用いた
各種性能試験、耐久試験の他に、油中にあらかじめ金属
摩耗粉や油の劣化成分等を混入させた汚染物質混合油を
用いて、試験対象とする油圧機器がどの程度まで汚染物
質混合油に耐えられるかその限界を確認する試験も行っ
ている。[Conventional technology] When checking the performance and durability of hydraulic equipment used in construction machinery, various mechanical devices, vehicles, etc., in addition to various performance tests and durability tests using clean oil, Tests are also conducted using contaminant-mixed oil mixed with metal wear particles and oil deterioration components to confirm the limits to which hydraulic equipment under test can withstand contaminant-mixed oil.
汚染物質混合油による限界試験を行う場合、従来は第２
図に示すように、油圧ポンプから供試アクチュエータを
経て油タンクに至る回路を設け、油タンク内の油にあら
かじめ金属摩耗粉や油の劣化成分等を所定量混入し、こ
れを回路内に循環させて試験を行っている。When performing limit tests using contaminant-mixed oil, conventionally the second
As shown in the figure, a circuit is established from the hydraulic pump to the oil tank via the test actuator, and a predetermined amount of metal wear particles and oil deterioration components are mixed into the oil in the oil tank, and this is circulated within the circuit. We are conducting a test.
［発明が解決しようとする課題］
しかしながら上記構造の試験装置においては、汚染物質
混合油が回路全体を循環するため、試験装置として用い
られている油圧ポンプの性能が低下し、供試アクチュエ
ータに所定の油量、油圧な加えることができなくなった
り、油圧ポンプの故障による試験中断等を起こしやすい
。また油圧ポンプの摩耗が促進されてその摩耗粉が汚染
物質混合油に混入し、供試アクチュエータに対する汚染
物質混入量が変化するため、試験精度が低下するという
問題点がある。[Problems to be Solved by the Invention] However, in the test device having the above structure, the oil mixed with contaminants circulates throughout the circuit, so the performance of the hydraulic pump used as the test device decreases, and Tests are likely to be interrupted due to failure of the hydraulic pump or failure to add sufficient oil or hydraulic pressure. Furthermore, there is a problem that the wear of the hydraulic pump is accelerated and the abrasion powder is mixed into the contaminant-mixed oil, changing the amount of contaminants mixed into the test actuator, resulting in a decrease in test accuracy.
上記従来の問題点を解決するため、本発明者らは第３図
ζこ示す汚染物質混合油供給装置を案出した。第３図に
おいて、汚染物質混合油供給装置の油圧ポンプ１と供試
アクチュエータ７とを結ぶ油圧回路内に２個の汚染物質
混合油槽４，１０を設け、この汚染物質混合油槽４，１
０をそれぞれフリーピストン４ａ、１０ａで気密分離し
、油圧ポンプ１から吐出される清浄油で前記フリーピス
トン４ａ、１０ａを駆動することにより、汚染物質混合
油槽の一方に充填した汚染物質混合油が供試アクチュエ
ータフに供給される。そして回路中に設けた切換弁２を
操作することにより２個の汚染物質混合油槽４．１０か
ら汚染物質混合油が交互に連続的に供試アクチュエータ
フに供給されるとともに、油圧ポンプ１には常に清浄油
が流れるので試験装置の汚染物質混合油による性能劣化
を防止することができる。In order to solve the above conventional problems, the present inventors have devised a contaminant-mixed oil supply device shown in FIG. 3ζ. In FIG. 3, two pollutant mixed oil tanks 4 and 10 are provided in the hydraulic circuit connecting the hydraulic pump 1 of the pollutant mixed oil supply device and the test actuator 7.
0 are hermetically separated by free pistons 4a and 10a, respectively, and the free pistons 4a and 10a are driven by clean oil discharged from the hydraulic pump 1, thereby supplying the pollutant mixed oil filled in one of the pollutant mixed oil tanks. Supplied to trial actuator tough. By operating the switching valve 2 provided in the circuit, contaminant-mixed oil is alternately and continuously supplied from the two contaminant-mixed oil tanks 4.10 to the test actuator tough, and the hydraulic pump 1 is Since clean oil always flows, it is possible to prevent performance deterioration of the test equipment due to contaminant-mixed oil.
しかしこの汚染物質混合油供給装置においては、汚染物
質混合油に含まれろ汚染物質の濃度を変更しようとする
場合、試験を中断して汚染物質混合油槽の汚染物質混合
油を入れ換えなければならない。このため汚染物質混合
油入れ換え工数がかかり、煩雑であることと、汚染物質
の濃度が不連続に変化するので試験精度の面からみて好
ましくない。However, in this contaminant-mixed oil supply device, if the concentration of contaminants contained in the contaminant-mixed oil is to be changed, the test must be interrupted and the contaminant-mixed oil in the contaminant-mixed oil tank must be replaced. This requires a lot of man-hours to replace the contaminant-mixed oil, which is complicated, and the concentration of the contaminant changes discontinuously, which is undesirable from the standpoint of test accuracy.
本発明はこのような問題点に着目し、汚染物質混合油供
給装置自体は汚染物質混合油の影響を受けることなく、
供試アクチュエータにのみ汚染物質混合油を供給するこ
とができるとともに、試験実施中に汚染物質の濃度を任
意に変更することができるような汚染物質混合油供給装
置を提供することを目的とする。The present invention focuses on these problems, and the contaminant-mixed oil supply device itself is not affected by the contaminant-mixed oil.
It is an object of the present invention to provide a contaminant-mixed oil supply device that can supply contaminant-mixed oil only to a test actuator and can arbitrarily change the concentration of contaminants during a test.
［課題を解決するための手段］
上記目的を達成するために本発明に係る汚染物質混合油
供給装置は、油圧ポンプから切換弁を経て一側の汚染物
質混合油槽に至る清浄油回路と、この汚染物質混合油槽
から切換弁を経て供試アクチュエータに至る汚染物質混
合油回路と、供試アクチュエータから切換弁を経て他側
の汚染物質：置台油槽に至る汚染物質混合油回路と、他
側の汚染物質混合油槽から切換弁を経て清浄油タンクに
至る清浄油回路と、前記油圧ポンプと切換弁とを結ぶ清
浄油回路から分岐して、切換弁と供試アクチュエータの
入口ポートとを結ぶ汚染物質混合油回路に接続する合流
回路と、供試アクチュエータの出口ポートと切換弁とを
結ぶ汚染物質混合油回路から分岐して汚染物質混合油タ
ンクに至る分岐回路とによって構成され、前記汚染物質
混合油槽は清浄油と汚染物質混合油とを気密分離するフ
リーピストンによって仕切られ、切換弁は汚染物質混合
油槽と切換弁間の各回路の流れの方向を切り換える機能
を備えるとともに、前記合流回路内に流量制御弁を設け
、分岐回路内にリリーフ弁を設ける構成とし、このよう
な構成において、流量制御弁は遠隔操作可能なパイロッ
ト操作弁を備えているものとし、かつ、パイロット操作
弁が圧力補償付パイロット操作弁である構成とした。[Means for Solving the Problems] In order to achieve the above object, the pollutant mixed oil supply device according to the present invention includes a clean oil circuit that runs from a hydraulic pump to a pollutant mixed oil tank on one side via a switching valve; Contaminant-mixed oil circuit from the contaminant-mixed oil tank to the test actuator via the switching valve; Contaminant-mixed oil circuit from the test actuator to the stand oil tank via the switching valve; A clean oil circuit runs from the substance mixing oil tank to the clean oil tank via the switching valve, and a contaminant mixing circuit branches off from the clean oil circuit that connects the hydraulic pump and the switching valve and connects the switching valve and the inlet port of the test actuator. It is composed of a confluence circuit connected to the oil circuit, and a branch circuit that branches from the contaminant mixed oil circuit connecting the outlet port of the test actuator and the switching valve to a contaminant mixed oil tank, and the contaminant mixed oil tank is The clean oil and pollutant mixed oil are partitioned off by a free piston that airtightly separates them, and the switching valve has the function of switching the flow direction of each circuit between the pollutant mixing oil tank and the switching valve, and there is a flow control function in the merging circuit. A valve is provided, and a relief valve is provided in the branch circuit, and in such a configuration, the flow control valve is equipped with a pilot-operated valve that can be remotely operated, and the pilot-operated valve is a pilot-operated valve with pressure compensation. It was configured as a valve.
［作用コ
上記構成によれは、汚染物質混合油供給装置の油圧ポン
プと供試アクチュエータとを結ぶ油圧回路内に２個の汚
染物質混合油槽を設け、この汚染物質混合油槽をフリー
ピストンで気密分離したので、油圧ポンプから吐出され
る清浄油でピストンを駆動することにより、汚染物質混
合油槽の一方に充填した汚染物質混合油が供試アクチュ
エータに供給される。そして回路中に設けた切換弁の操
作により２個の汚染物質混合油槽から汚染物質混合油が
交互に連続的に供試アクチュエータに供給されるととも
に、油圧ポンプには常に清浄油が流れることになる。[Function] According to the above configuration, two pollutant mixed oil tanks are provided in the hydraulic circuit connecting the hydraulic pump of the pollutant mixed oil supply device and the test actuator, and these pollutant mixed oil tanks are airtightly separated by a free piston. Therefore, by driving the piston with clean oil discharged from the hydraulic pump, the pollutant mixed oil filled in one of the pollutant mixed oil tanks was supplied to the test actuator. By operating a switching valve installed in the circuit, contaminant-mixed oil is alternately and continuously supplied to the test actuator from the two contaminant-mixed oil tanks, and clean oil always flows to the hydraulic pump. .
また油圧ポンプから吐出される清浄油を汚染物質混合油
に合流させる回路構成としたので、供試アクチュエータ
に流入する汚染物質混合油の汚染物質濃度を試験中に、
かつ連続的に変化させることがてきる。In addition, since the circuit was configured to allow the clean oil discharged from the hydraulic pump to join the pollutant-mixed oil, the contaminant concentration of the pollutant-mixed oil flowing into the test actuator could be measured during the test.
And it can be changed continuously.
更に、汚染物質混合油に合流させる清浄油の流量制御弁
を、圧力補償付パイロット操作弁によって遠隔操作でき
るようにしたので、合流させる清浄油の流量は油圧ポン
プの吐出圧、供試アクチュエータの圧力等に影響される
ことなく、一定値を維持することができる。Furthermore, the flow rate control valve for the clean oil that joins the pollutant-mixed oil can be controlled remotely using a pilot-operated valve with pressure compensation, so the flow rate of the clean oil that joins the contaminant-mixed oil is controlled by the discharge pressure of the hydraulic pump and the pressure of the test actuator. It is possible to maintain a constant value without being affected by
［実施例］
以下に本発明に係る汚染物質混合油供給装置の実施例に
ついて、図面を参照して詳細に説明する。[Example] Hereinafter, an example of the contaminant mixed oil supply device according to the present invention will be described in detail with reference to the drawings.
第１図において、油圧ポンプ１と切換弁２とは清浄油回
路３て、また切換弁２と一側の汚染物質混合油槽４の左
端とは清浄油回路５てそれぞれ接続され、汚染物質混合
油槽４の右端と切換弁２とは汚染物質混合油回路６て、
また切換弁２と供試アクチュエータ７の入口ポートとは
汚染物質混合油回路８でそれぞれ接続されている。供試
アクチュエータ７の出口ポートと切換弁２とは汚染物質
混合油回路９て、また切換弁２と他側の汚染物質混合油
槽１０の右端とは汚染物質混合油回路１１で接続され、
汚染物質混合油槽１０の左端と切換弁２とは清浄油回路
１２で、また切換弁２と清浄油タンク１３とは清浄油回
路１４でそれぞれ接続されている。In FIG. 1, the hydraulic pump 1 and the switching valve 2 are connected to a clean oil circuit 3, and the switching valve 2 and the left end of the pollutant mixing oil tank 4 on one side are connected to a clean oil circuit 5, respectively. The right end of 4 and the switching valve 2 are the contaminant mixed oil circuit 6,
Further, the switching valve 2 and the inlet port of the test actuator 7 are connected through a contaminant mixed oil circuit 8, respectively. The outlet port of the test actuator 7 and the switching valve 2 are connected by a pollutant mixing oil circuit 9, and the switching valve 2 and the right end of the pollutant mixing oil tank 10 on the other side are connected by a pollutant mixing oil circuit 11.
The left end of the pollutant mixed oil tank 10 and the switching valve 2 are connected through a clean oil circuit 12, and the switching valve 2 and the clean oil tank 13 are connected through a clean oil circuit 14, respectively.
前記清浄油回路３から分岐する合流回路１５は、切換弁
２と供試アクチュエータ７の入口ポートとを結ぶ汚染物
質混合油回路８に入点で接続され、合流回路１５内には
流量制御弁１６が設けられている。この流量制御弁１６
には手動操作の圧力補償付パイロット操作弁１７が接続
されていて、圧力補償付パイロット操作弁１７により流
量制御弁１６を遠隔操作することができるとともに、回
路８の圧力の変動にかかわらず所定の流量を合流させる
ことができるようになっている。なお圧力補償付パイロ
ット操作弁は、本発明者らがさきに出願した特願昭６０
−２６８９２５によるものである。A confluence circuit 15 branching from the clean oil circuit 3 is connected at an entry point to a pollutant mixed oil circuit 8 that connects the switching valve 2 and the inlet port of the test actuator 7. is provided. This flow control valve 16
A manually operated pilot operated valve 17 with pressure compensation is connected to the pressure compensated pilot operated valve 17, which allows the flow rate control valve 16 to be remotely controlled and to maintain a predetermined value regardless of pressure fluctuations in the circuit 8. It is now possible to combine the flow rates. The pilot-operated valve with pressure compensation is disclosed in the patent application filed in 1986 by the present inventors.
-268925.
更に、供試アクチュエータフの出口ポートと切換弁２と
を結ぶ汚染物質混合油回路９の分岐回路１８は、リリー
フ弁１９を経て汚染物質混合油タンク２０に接続されて
いる。Further, a branch circuit 18 of the contaminant mixed oil circuit 9 connecting the outlet port of the test actuator tough and the switching valve 2 is connected to the contaminant mixed oil tank 20 via a relief valve 19 .
切換弁２は８ボ一ト２位置切換弁で、手動により切り換
えられる。また、汚染物質混合油槽４゜１０はいずれも
清浄油と汚染物質混合油とを気密分離するフリーピスト
ン４ａ、１０ａを備えたシリンダで、汚染物質混合油槽
４，１００−側に清浄油、他側に汚染物質混合油が充填
されている。The switching valve 2 is an 8-point, 2-position switching valve that can be switched manually. In addition, the pollutant mixed oil tanks 4 and 10 are all cylinders equipped with free pistons 4a and 10a that airtightly separate clean oil and pollutant mixed oil. is filled with contaminant-mixed oil.
また、前記汚染物質混合油回路６に接続する配管２１に
はコック２２．２３と、汚染物質補給口２４とが設けら
れている。Further, the piping 21 connected to the contaminant mixed oil circuit 6 is provided with cocks 22, 23 and a contaminant supply port 24.
次に上記汚染物質混合油供給装置の作動について説明す
る。供試アクチュエータフに回路８．９を接続した後、
油圧ポンプ１を駆動する。油圧ポンプ１から吐出された
清浄油は回路３、切換弁２、回路５を経て汚染物質混合
油槽４に流入し、フリーピストン４ａを第１図において
右方に押す。これにより汚染物質混合油槽４内の汚染物
質混合油が押し出され、回路６、切換弁２、回路８を経
て供試アクチュエータ７因に流入する。同時に回路３か
ら分岐する合流回路１５を流れる清誓争油は、流量制御
弁１６を経てＡ点て回路８を流れる汚染物質混合油と合
流する。Next, the operation of the pollutant mixed oil supply device will be explained. After connecting circuit 8.9 to the test actuator tough,
The hydraulic pump 1 is driven. The clean oil discharged from the hydraulic pump 1 flows into the contaminant mixing oil tank 4 through the circuit 3, the switching valve 2, and the circuit 5, and pushes the free piston 4a to the right in FIG. 1. As a result, the pollutant-mixed oil in the pollutant-mixed oil tank 4 is pushed out and flows into the test actuator 7 via the circuit 6, the switching valve 2, and the circuit 8. At the same time, the clean conflict oil flowing through the merging circuit 15 branching from the circuit 3 passes through the flow rate control valve 16 and joins with the contaminant-mixed oil flowing through the circuit 8 at point A.
合流回路１５を流れる清浄油の流量をＱｃ、回路８を流
れる汚染物質混合油の流量をＱｄとすると、供試アクチ
ュエータフには上記流量の比率に応した濃度を有する汚
染物質混合油流ＩＬＱｃ＋Ｑｄ ＝Ｑｓが流入する。今
これらの油中に含まれる汚染物質濃度をそれぞれＰｃ、
Ｐｄ、Ｐｓとし、単位時間当りの流量たとえば（ｊ／ｍ
ｉｎ中に含まれる汚染物質の重量をそれぞれＸＣ，Ｘｄ
、Ｘｓとすると、
またＡ点において合流するから
Ｘｓ ＝Ｘｃ ＋Ｘｄ・・・・・・・・・・・・・・・
・・・（４）（４）式に（１）、 （２）、 （３
）式を代入して整理すると、
油圧ポンプ１の吐出量をＱｏとすると
Ｑｏ ＝Ｑｓ （＝ 一定）・・・・・・・・・・・
・・・（６）Ｑｄ ＝Ｑｏ−Ｑｃ・・・・・・・・・・
・・・・・・・・（７）（６）、 （７）式を（５）
式に代入するとすなわち供試アクチュエータへの流入濃
度Ｐｓは、清浄油流量Ｑｃの一次関数として決定される
。従って流量制御弁によって流１１ Ｑ ｃを定めれは
濃度Ｐｓが定まる。Let Qc be the flow rate of the clean oil flowing through the confluence circuit 15, and Qd be the flow rate of the pollutant mixed oil flowing through the circuit 8, then the test actuator will have a pollutant mixed oil flow ILQc+Qd having a concentration corresponding to the above flow rate ratio. Qs flows in. Now let the contaminant concentrations contained in these oils be Pc,
Let Pd and Ps be the flow rate per unit time, for example (j/m
The weight of the pollutants contained in the in is XC and Xd, respectively.
, Xs, and since they meet at point A, Xs = Xc + Xd...
...(4) In equation (4), (1), (2), (3
) formula and rearranging it, if the discharge amount of hydraulic pump 1 is Qo, then Qo = Qs (= constant)...
... (6) Qd = Qo - Qc ......
・・・・・・(7)(6), Expression (7) is converted into (5)
Substituting into the equation, the inflow concentration Ps to the test actuator is determined as a linear function of the clean oil flow rate Qc. Therefore, when the flow rate control valve determines the flow 11 Q c, the concentration Ps is determined.
汚染物質混合油は供試アクチュエータ７の出口ポートか
ら回路９、切換弁２、回路１１を経て汚染物質混合油槽
１０の右側に流入し、その油圧でフリーピストン１０ａ
は左方に押され、汚染物質混合油槽１０内の清浄油は回
路１２、切換弁２、回路１４を経て清浄油タンク１３に
戻る。The pollutant-mixed oil flows from the outlet port of the test actuator 7 through the circuit 9, the switching valve 2, and the circuit 11 to the right side of the pollutant-mixed oil tank 10, and the oil pressure causes the free piston 10a to move.
is pushed to the left, and the clean oil in the pollutant mixed oil tank 10 returns to the clean oil tank 13 via the circuit 12, the switching valve 2, and the circuit 14.
汚染物質混合油槽４のフリーピストン４ａがストローク
エンドに達したとき、切換弁２を手動操作して切り換え
ると、油圧ポンプ１から吐出された清浄油は回路３、切
換弁２、回路１２を経て汚染物質混合油槽１０の左側に
流入し、フリーピストン１０ａを右方に押す。これによ
り汚染物質混合油槽１０内の汚染物質混合油が押し出さ
れ、回路１１、切換弁２、回路８を経て、Ａ点で合流回
路１５の清浄油と合流の上、供試アクチュエータ７内に
流入する。When the free piston 4a of the pollutant mixing oil tank 4 reaches the stroke end, when the switching valve 2 is manually operated and switched, the clean oil discharged from the hydraulic pump 1 passes through the circuit 3, the switching valve 2, and the circuit 12, and is contaminated. It flows into the left side of the substance mixing oil tank 10 and pushes the free piston 10a to the right. As a result, the pollutant-mixed oil in the pollutant-mixed oil tank 10 is pushed out, passes through the circuit 11, the switching valve 2, and the circuit 8, merges with the clean oil in the merging circuit 15 at point A, and then flows into the test actuator 7. do.
リリーフ弁１９は合流によって増加した油量を汚染物質
混合油タンク２０にトレンさせるものである。すなわち
、−側の汚染物質混合油槽４から押し出された流量Ｑｄ
がＡ点での合流によってＱｄ ＋Ｑｃ ＝Ｑｓとなり、
増量する。これが他側の汚染物質混合油槽１０に流入す
るわけて、フリーピストン１０ａは４ａより先にストロ
ークエンドに達する。フリーピストン１０ａがストロー
クエンドに達すると、供試アクチュエータフの出口油圧
が上昇するので、この油圧上昇によりリリーフ弁１９が
開口し、流量Ｑｓは汚染物質混合油タンク２０にドレン
される。この汚染物質混合油タンク２０は清浄油タンク
１３と分離されているので、清浄油タンク１３の清浄油
は汚染されない。The relief valve 19 is for draining the increased amount of oil due to the merging into the contaminant mixed oil tank 20. In other words, the flow rate Qd pushed out from the contaminant mixed oil tank 4 on the negative side
By merging at point A, Qd +Qc =Qs,
Increase. This flows into the contaminant mixing oil tank 10 on the other side, and the free piston 10a reaches the stroke end before the free piston 4a. When the free piston 10a reaches the stroke end, the outlet oil pressure of the test actuator tough rises, so the relief valve 19 opens due to this oil pressure rise, and the flow rate Qs is drained into the contaminant mixed oil tank 20. Since this contaminant mixed oil tank 20 is separated from the clean oil tank 13, the clean oil in the clean oil tank 13 is not contaminated.
切換弁２を切り換えて、他側の汚染物質混合油槽１０か
ら汚染物質混合油が押し出される場合も前記と同様に、
フリーピストン４ａがストロークエンドに達した時点で
リリーフ弁１９が作動する。Similarly to the above, when the switching valve 2 is switched and the pollutant mixed oil is pushed out from the pollutant mixed oil tank 10 on the other side,
The relief valve 19 is activated when the free piston 4a reaches the stroke end.
なお、前記合流回路１５を流れる清浄油をＡ点て合流さ
せることにより、供試アクチュエータフに流入する汚染
物質混合油の汚染物質濃度Ｐｓは連続的に低下する。前
記濃度Ｐｓを一定に維持したい場合、あるいは濃度Ｐｓ
を連続的に増大させる場合は、回路６に接続する汚染物
質補給口２４から所定量の汚染物質を補給することによ
り、前記目的を達成することができる。Note that by merging the clean oil flowing through the merging circuit 15 at point A, the contaminant concentration Ps of the contaminant-mixed oil flowing into the test actuator tough is continuously reduced. When it is desired to maintain the concentration Ps constant, or when the concentration Ps
When continuously increasing the amount of contaminants, the above objective can be achieved by replenishing a predetermined amount of contaminants from the contaminant supply port 24 connected to the circuit 6.
汚染物質混合油槽１０に清浄油が充満して、フリーピス
トン１０ａがストロークエンドに達すると、再度切換弁
２を手動操作して切り換え、最初の状態に戻す。以下向
し作動を繰り返すことにより、供試アクチュエータには
絶えず所定濃度の汚染物質混合油が供給され、汚染物質
混合油による限界試験を円滑に行うことができる。When the contaminant mixed oil tank 10 is filled with clean oil and the free piston 10a reaches the end of its stroke, the switching valve 2 is manually operated and switched again to return to the initial state. By repeating the downward operation, the test actuator is constantly supplied with the contaminant-mixed oil at a predetermined concentration, and a limit test using the contaminant-mixed oil can be carried out smoothly.
供試アクチュエータが、たとえば油圧シリンダのように
油の流れを切り換える必要がある場合は、切換弁２と供
試アクチュエータ７とを結ぶ回路８゜９内に更に切換弁
を追加設置し、一定時間ことにこれを切り換え操作すれ
ばよい。If the test actuator requires switching the flow of oil, such as a hydraulic cylinder, an additional switching valve is installed in the circuit 8゜9 connecting the switching valve 2 and the test actuator 7, and the switching valve is operated for a certain period of time. All you have to do is switch this to .
［発明の効果コ
以上説明したように本発明によれば、フリーピストンで
気密分離した汚染物質混合油槽を２個設置し、供試アク
チュエータと前記２個の汚染物質混合油槽との間に配設
された回路のみに汚染物質混合油を流通させる構成とし
たので、汚染物質混合油供給装置に用いられる油圧ポン
プには常に清浄油が流れることになる。従って、油圧ポ
ンプは汚染物質混合油の影響を受けず、従来から問題と
なっている汚染物質混合油による油圧ポンプの性能、耐
久性の低下あるいは故障による試験の中断を防止するこ
とができる。[Effects of the Invention] As explained above, according to the present invention, two contaminant mixing oil tanks are installed that are airtightly separated by a free piston, and are arranged between the test actuator and the two contaminant mixing oil tanks. Since the contaminant-mixed oil is configured to flow only through the circuit where the contaminant-mixed oil is supplied, clean oil always flows through the hydraulic pump used in the contaminant-mixed oil supply device. Therefore, the hydraulic pump is not affected by the contaminant-mixed oil, and it is possible to prevent the performance and durability of the hydraulic pump from deteriorating due to the contaminant-mixed oil, which has been a problem in the past, or from interrupting the test due to failure.
これに伴って油圧ポンプの摩耗等による汚染物質混合油
の汚染物質成分の変動も防止することができ、試験精度
が向上する。Accordingly, it is possible to prevent fluctuations in the contaminant components of the contaminant-mixed oil due to wear of the hydraulic pump, etc., and the test accuracy is improved.
次に本発明では、油圧ポンプから吐出される清浄油を汚
染物質混合油に合流させる回路構成としたので、供試ア
クチュエータに流入する汚染物質混合油の汚染物質濃度
を試験中に、かつ連続的に変化させることができる。Next, in the present invention, the circuit configuration is such that the clean oil discharged from the hydraulic pump is merged with the pollutant-mixed oil, so that the pollutant concentration of the pollutant-mixed oil flowing into the test actuator can be continuously measured during the test. can be changed to
また、汚染物質混合油に合流させる清浄油の流量制御弁
を、圧力補償付パイロット操作弁によって遠隔操作でき
るようにしたので、安全上有利であるとともに、合流さ
せる清浄油の流量は回路内の負荷変動に影響されること
なく、一定値を維持することができ、供試アクチュエー
タに一定の濃度の汚染物質混合油を供給することができ
る。In addition, the flow rate control valve for the clean oil that joins the pollutant-mixed oil can be controlled remotely using a pilot-operated valve with pressure compensation, which is advantageous in terms of safety. A constant value can be maintained without being affected by fluctuations, and a constant concentration of contaminant-mixed oil can be supplied to the test actuator.
第１図は実施例に係る汚染物質混合油供給装置の油圧回
路図、第２図は従来の技術による汚染物質混合油供給装
置の油圧回路図、第３図は本発明者らがさきに案出した
汚染物質混合油供給装置の油圧回路図である。
１・・・・・・油圧ポンプ
２・・・・・・切換弁
３、 ５． １２． １４・・・・・・清浄油回路４．
１０・・・・・・汚染物質混合油槽４ａ、１０ａφ０・
ΦΦフリーピストン６、 ８． ９． １１・・・・・
・汚染物質混合油回路７・・・・・・供試アクチュエー
タ
１３・・・・・・清浄油タンク
１５・・・・・・合流回路
１６・・・・・・流量制御弁
１７・・・・・・パイロット操作弁
１８・・・・・・分岐回路
１９・・・・・・リリーフ弁
２０・・・・・・汚染物質混合油タンク特許出願人 株
式会社小松製作所
第１図FIG. 1 is a hydraulic circuit diagram of a contaminant-mixed oil supply device according to an embodiment, FIG. 2 is a hydraulic circuit diagram of a contaminant-mixed oil supply device according to the conventional technology, and FIG. 3 is a hydraulic circuit diagram of a contaminant-mixed oil supply device according to the prior art. FIG. 2 is a hydraulic circuit diagram of the pollutant-mixed oil supply device. 1...Hydraulic pump 2...Switching valve 3, 5. 12. 14...Clean oil circuit 4.
10...Contaminant mixed oil tank 4a, 10aφ0・
ΦΦ free piston 6, 8. 9. 11...
・Contaminant mixed oil circuit 7... Test actuator 13... Clean oil tank 15... Merging circuit 16... Flow rate control valve 17... ... Pilot operated valve 18 ... Branch circuit 19 ... Relief valve 20 ... Contaminant mixed oil tank Patent applicant Komatsu Ltd. Figure 1
Claims (3)
混合油槽４に至る清浄油回路３、５と、この汚染物質混
合油槽４から切換弁２を経て供試アクチュエータ７に至
る汚染物質混合油回路６、８と、供試アクチュエータ７
から切換弁２を経て他側の汚染物質混合油槽１０に至る
汚染物質混合油回路９、１１と、他側の汚染物質混合油
槽１０から切換弁２を経て清浄油タンク１３に至る清浄
油回路１２、１４と、前記油圧ポンプ１と切換弁２とを
結ぶ清浄油回路３から分岐して、切換弁２と供試アクチ
ュエータ７の入口ポートとを結ぶ汚染物質混合油回路８
に接続する合流回路１５と、供試アクチュエータ７の出
口ポートと切換弁２とを結ぶ汚染物質混合油回路９から
分岐して汚染物質混合油タンク２０に至る分岐回路１８
とによって構成され、前記汚染物質混合油槽４、１０は
清浄油と汚染物質混合油とを気密分離するフリーピスト
ン４ａ、１０ａによって仕切られ、切換弁２は汚染物質
混合油槽４、１０と切換弁２間の各回路５、６、１１、
１２の流れの方向を切り換える機能を備えるとともに、
前記合流回路１５内に流量制御弁１６を設け、分岐回路
１８内にリリーフ弁１９を設けたことを特徴とする汚染
物質混合油供給装置。(1) Clean oil circuits 3 and 5 from the hydraulic pump 1 to the contaminant-mixing oil tank 4 on one side via the switching valve 2, and contaminants from the contaminant-mixing oil tank 4 to the test actuator 7 via the switching valve 2 Mixed oil circuits 6 and 8 and test actuator 7
Contaminant mixing oil circuits 9 and 11 from the contaminant mixing oil tank 10 on the other side to the contaminant mixing oil tank 10 on the other side via the switching valve 2, and a clean oil circuit 12 extending from the contaminant mixing oil tank 10 on the other side to the clean oil tank 13 via the switching valve 2. , 14, and a contaminant mixed oil circuit 8 that branches from the clean oil circuit 3 that connects the hydraulic pump 1 and the switching valve 2 and connects the switching valve 2 and the inlet port of the test actuator 7.
and a branch circuit 18 that branches from the contaminant mixed oil circuit 9 that connects the outlet port of the test actuator 7 and the switching valve 2 to the contaminant mixed oil tank 20.
The pollutant mixed oil tanks 4 and 10 are partitioned by free pistons 4a and 10a that airtightly separate the clean oil and the pollutant mixed oil, and the switching valve 2 is configured to separate the pollutant mixed oil tanks 4 and 10 and the switching valve 2. Each circuit between 5, 6, 11,
Equipped with a function to switch the direction of 12 flows,
A contaminant mixed oil supply device characterized in that a flow control valve 16 is provided in the merging circuit 15 and a relief valve 19 is provided in the branch circuit 18.
弁１７を備えていることを特徴とする請求項（１）記載
の汚染物質混合油供給装置。(2) The contaminant mixed oil supply device according to claim (1), wherein the flow rate control valve 16 is equipped with a remotely controllable pilot operation valve 17.
作弁である請求項（２）記載の汚染物質混合油供給装置
。(3) The contaminant mixed oil supply device according to claim (2), wherein the pilot operated valve 17 is a pressure compensated pilot operated valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10265290A JPH047A (en) | 1990-04-17 | 1990-04-17 | Device for supplying contaminant mixed oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10265290A JPH047A (en) | 1990-04-17 | 1990-04-17 | Device for supplying contaminant mixed oil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH047A true JPH047A (en) | 1992-01-06 |
Family
ID=14333178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10265290A Pending JPH047A (en) | 1990-04-17 | 1990-04-17 | Device for supplying contaminant mixed oil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH047A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6232136B1 (en) * | 1990-12-31 | 2001-05-15 | Kopin Corporation | Method of transferring semiconductors |
| US6441466B1 (en) * | 1996-02-02 | 2002-08-27 | Micron Technology, Inc. | Method and apparatus for reducing fixed charge in semiconductor device layers |
| US6452233B1 (en) * | 1999-03-23 | 2002-09-17 | Citizen Watch Co., Ltd. | SOI device having a leakage stopping layer |
| US6538277B2 (en) * | 1998-12-10 | 2003-03-25 | Taiwan Semiconductor Manufacturing Company | Split-gate flash cell |
| US6590227B2 (en) * | 1999-12-27 | 2003-07-08 | Semiconductor Energy Laboratory Co., Ltd. | Active matrix display device |
| CN103335834A (en) * | 2013-07-02 | 2013-10-02 | 南京工业大学 | Throttle valve port performance test device |
| US20180290027A1 (en) * | 2015-06-05 | 2018-10-11 | Yonex Co., Ltd. | Racket |
-
1990
- 1990-04-17 JP JP10265290A patent/JPH047A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6232136B1 (en) * | 1990-12-31 | 2001-05-15 | Kopin Corporation | Method of transferring semiconductors |
| US6441466B1 (en) * | 1996-02-02 | 2002-08-27 | Micron Technology, Inc. | Method and apparatus for reducing fixed charge in semiconductor device layers |
| US6667540B2 (en) * | 1996-02-02 | 2003-12-23 | Micron Technology, Inc. | Method and apparatus for reducing fixed charge in semiconductor device layers |
| US6538277B2 (en) * | 1998-12-10 | 2003-03-25 | Taiwan Semiconductor Manufacturing Company | Split-gate flash cell |
| US6452233B1 (en) * | 1999-03-23 | 2002-09-17 | Citizen Watch Co., Ltd. | SOI device having a leakage stopping layer |
| US6590227B2 (en) * | 1999-12-27 | 2003-07-08 | Semiconductor Energy Laboratory Co., Ltd. | Active matrix display device |
| CN103335834A (en) * | 2013-07-02 | 2013-10-02 | 南京工业大学 | Throttle valve port performance test device |
| CN103335834B (en) * | 2013-07-02 | 2015-08-19 | 南京工业大学 | A kind of throttle valve port performance test device |
| US20180290027A1 (en) * | 2015-06-05 | 2018-10-11 | Yonex Co., Ltd. | Racket |
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