JPH04189223A - Method for diagnosing hydraulic drive system of reclaimer - Google Patents

Method for diagnosing hydraulic drive system of reclaimer

Info

Publication number
JPH04189223A
JPH04189223A JP2315869A JP31586990A JPH04189223A JP H04189223 A JPH04189223 A JP H04189223A JP 2315869 A JP2315869 A JP 2315869A JP 31586990 A JP31586990 A JP 31586990A JP H04189223 A JPH04189223 A JP H04189223A
Authority
JP
Japan
Prior art keywords
hydraulic
oil
pressure
reclaimer
measured
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
Application number
JP2315869A
Other languages
Japanese (ja)
Inventor
Masayoshi Ishikawa
正芳 石川
Kenzo Saito
堅三 斉藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Steel Corp
Original Assignee
Kawasaki Steel Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Priority to JP2315869A priority Critical patent/JPH04189223A/en
Publication of JPH04189223A publication Critical patent/JPH04189223A/en
Pending legal-status Critical Current

Links

Landscapes

  • Control And Safety Of Cranes (AREA)

Abstract

PURPOSE:To detect abnormality early, and perform the appropriate processing by measuring oil flow quantity of a drain exhaust passage and oil pressure of a circulation passage, and comparing the measured data with reference values to detect existence of abnormality of an oil drive system. CONSTITUTION:Oil flow quantity of a drain pipe 25a of a drain exhaust passage of a hydraulic pump 21 for circulating the operating oil and a drain pipe 25b of a drain exhaust passage of a hydraulic motor 23 for driving a turning frame of a reclaimer and a wheel loader are measured by a flow meter R, and oil pressure of an oil supporting pipe 22 or an oil returning pipe 24 of a circulation passage for connecting the hydraulic pump 21 and the hydraulic motor 23 is measured by a pressure detecter P1, and furthermore, the inner pressure of an accumulator pipe 32a of an accumulator 32 is measured by a pressure detecter P2. Data processing of the obtained each measured data and a predetermined reference value is performed by a computer C with predetermined computing processing, and a result of data processing is displayed by CRT 34 connected to the computer C to output an alarm in the case that a measured data of each part is dislocated from the reference value, and data processing is always monitored.

Description

【発明の詳細な説明】 (産業上の利用分野) この発明は、リクレーマの油圧駆動系統の診断方法に関
するものである。
DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for diagnosing a hydraulic drive system of a reclaimer.

(従来の技術) ヤード内の鉱石やコークス等を採取して地上コンベヤに
送給する役目を担うリクレーマは、その旋回駆動機構や
、ホイルローダの駆動機構に油圧形式が採用されている
が、かかる駆動機構に設置される油圧ポンプ、油圧モー
タにおいてはピストンやシリンダの摺動部におけるすき
間が拡大し作動油がリークするため、所定の性能を長期
にわたって維持し得ない問題があった。
(Prior Art) Reclaimers, which are responsible for collecting ore, coke, etc. in a yard and feeding them to an above-ground conveyor, employ hydraulic types for their swing drive mechanism and wheel loader drive mechanism. In hydraulic pumps and hydraulic motors installed in mechanisms, gaps in the sliding parts of pistons and cylinders widen, causing hydraulic oil to leak, making it impossible to maintain predetermined performance over a long period of time.

上記のような作動油のリーク状況を把握する従来手法と
しては、油圧ポンプなどの機器を含めた油圧経路の全体
の圧力変動をチエツクするにとどまるため、作動油の供
給系の何れにおいて異常があるのか特定できず、結局こ
の異常部位を検出するためには多大の労力と時間を必要
とした。また上記のリクレーマは現在、完全に自動運転
されていて、リクレーマ上に運転員が搭乗していない状
況では、油圧系統のチック頻度が少ないなめ、油圧ポン
プ等における作動油のリークが増大した場合には正常時
よりも多くの作動油を供給するなどの措置をとる必要が
あるところ、迅速な対応ができないのが現状であった。
Conventional methods for ascertaining the status of hydraulic oil leaks as described above only check for pressure fluctuations in the entire hydraulic path, including equipment such as hydraulic pumps, so there is no problem in any part of the hydraulic oil supply system. In the end, it took a great deal of effort and time to detect this abnormality. In addition, the reclaimer mentioned above is currently fully automated, and when there is no operator on board the reclaimer, the frequency of ticks in the hydraulic system is low. It is necessary to take measures such as supplying more hydraulic oil than normal, but the current situation is that prompt responses cannot be taken.

(発明が解決しようとする課題) リクレーマの旋回フレームあるいはホイルローダの駆動
を行うための油圧駆動系統の異常を早期に検知し適切な
処置を施すことができる診断方法を提案することがこの
発明の目的である。
(Problems to be Solved by the Invention) It is an object of the present invention to propose a diagnostic method that can detect abnormalities in the hydraulic drive system for driving the revolving frame of the reclaimer or the wheel loader at an early stage and take appropriate measures. It is.

(課題を解決するための手段) この発明は、作動油を循環させる油圧ポンプとこの油圧
ポンプより循環された作動油によって旋回フレームある
いはホイルローダの駆動を行う油圧モータを備えたりク
レーマの油圧駆動系統を診断するに当たり、作動油を循
環させる油圧ポンプのドレン排出経路と、リクレーマの
旋回フレームあるいはホイルローダの駆動を司る油圧モ
ータのドレン排出経路のそれぞれの油流量を計測すると
ともに、油圧ポンプと油圧モータを繋く循環経路の油圧
を計測し、得られた測定データと予め定められた基準値
を比較することにより、油圧ポンプ及び油圧モータを含
めた油圧駆動系統の異常の有無を検知することを特徴と
するりクレーマの油圧駆動系統の診断方法である。
(Means for Solving the Problems) The present invention includes a hydraulic pump that circulates hydraulic oil and a hydraulic motor that drives a swing frame or a wheel loader using the hydraulic oil circulated by the hydraulic pump, and a hydraulic drive system of a crane. For diagnosis, we measure the oil flow rate in the drain discharge path of the hydraulic pump that circulates the hydraulic oil, and the drain discharge path of the hydraulic motor that drives the reclaimer's revolving frame or wheel loader, and also connect the hydraulic pump and hydraulic motor. By measuring the oil pressure in the circulation path and comparing the obtained measurement data with a predetermined reference value, it is possible to detect whether there is an abnormality in the hydraulic drive system including the hydraulic pump and the hydraulic motor. This is a method for diagnosing the hydraulic drive system of a reclaimer.

さて、第1図にリクレーマ全体の概略を示し、図におけ
る番号1はヤードに敷設され、鉱石やコークス等の原料
を高炉、焼結あるいはコークス工場への搬送を司る地上
コンベヤ、2は走行レール、3は走行レール2に沿って
移動可能な走行装置、4は地上コンベア1を跨いで走行
装置3に載置される門形フレーム、5は門形フレーム4
の上部に配置される旋回装置、6は旋回装置5にボルト
などを介して連結される旋回フレーム、7はヤード内の
原料を採取するホイルローダ7a及びこのホイルローダ
7aで採取した原料を搬送するコンヘア7bを備えるブ
ームであって、このブーム7の後端部は枢支ビン7cを
介して旋回フレーム6に連結される。また、8はブーム
7のコンベヤ7bによって搬送された原料を地上コンベ
ヤ1に排出するためのシュート、9はブーム7を俯仰さ
せる際にバランスをとるためのウェイト、10はジープ
、11は一端をシーブ10に、他端をブーム7にそれぞ
れ枢支ビンllaを介して枢動連結したフレーム、12
は俯仰用のポストであって、このボスト12の一端はシ
ーブ10に連結され、他端はブーム7に連結される。
Now, Fig. 1 shows an outline of the entire reclaimer, and number 1 in the figure is an above-ground conveyor that is installed in the yard and is responsible for transporting raw materials such as ore and coke to the blast furnace, sintering, or coke factory, and number 2 is a running rail. 3 is a traveling device movable along the traveling rail 2; 4 is a gate-shaped frame mounted on the traveling device 3 while straddling the ground conveyor 1; and 5 is a portal frame 4.
6 is a revolving frame connected to the revolving device 5 via bolts, etc.; 7 is a wheel loader 7a for collecting raw materials in the yard; and a conhair 7b for transporting the raw materials collected by the wheel loader 7a. The rear end of the boom 7 is connected to the swing frame 6 via a pivot pin 7c. Further, 8 is a chute for discharging the raw material conveyed by the conveyor 7b of the boom 7 to the ground conveyor 1, 9 is a weight for balancing when raising and raising the boom 7, 10 is a jeep, and 11 is a sheave at one end. 10, a frame whose other end is pivotally connected to the boom 7 via a pivot pin lla; 12;
is a post for elevation, and one end of this post 12 is connected to the sheave 10, and the other end is connected to the boom 7.

また、13はシーブ10とウェイト9及び旋回フレーム
6を繋ぐフレームであって、このフレーム13は枢支ビ
ン13a、 13b、 13cを介してシーブlO、ウ
ェイト9及び旋回フレーム6にそれぞれ連結される。
Further, 13 is a frame that connects the sheave 10, the weight 9, and the rotating frame 6, and this frame 13 is connected to the sheave 10, the weight 9, and the rotating frame 6 through pivot pins 13a, 13b, and 13c, respectively.

14は旋回フレーム6に保持されたシーブ、15は電動
モータなどの駆動源15aを備えた俯仰装置、16は俯
仰装置15とシーブ10.14を繋ぐワイヤーロープ、
17はコンベヤ7bを駆動する駆動装置、18はホイル
ローダ駆動用のホイル駆動油圧装置、19はリクレーマ
の旋回用油圧装置であって、この発明に ゛おいては、
旋回駆動用あるいはホイル駆動用油圧装置として第2図
に示すような形式になるものが適用される。
14 is a sheave held by the revolving frame 6; 15 is an elevating device equipped with a drive source 15a such as an electric motor; 16 is a wire rope connecting the elevating device 15 and the sheave 10.14;
17 is a drive device for driving the conveyor 7b, 18 is a wheel drive hydraulic device for driving the wheel loader, and 19 is a reclaimer turning hydraulic device.
As a hydraulic device for swing drive or wheel drive, a type shown in FIG. 2 is used.

上記の構成になるリクレーマにおいて、ホイルローダ7
aによって採取された原料はコンヘア7bにて搬送され
シュート8を経由して地上コンベア1に排出されて高炉
、焼結あるいはコークス工場などへ運ばれる。またリク
レーマは、俯仰装置15のドラムにワイヤーロープ14
を巻付け、巻き戻しすることによりブーム7の俯仰動作
を行い、旋回装置5の作動によって旋回フレーム°6の
旋回動作を行う。
In the reclaimer configured as above, the wheel loader 7
The raw material collected by step a is conveyed by a conveyor 7b, discharged via a chute 8 onto an above-ground conveyor 1, and transported to a blast furnace, sintering or coke factory. In addition, the reclaimer has a wire rope 14 attached to the drum of the elevating device 15.
By winding and unwinding the boom 7, the boom 7 is raised and raised, and when the swing device 5 is operated, the swing frame 6 is turned.

(作 用) リクレーマの旋回フレームあるいはホイルローダを駆動
させるためのものとしては、通常、第3図に示すような
形式の油圧駆動装置が適用されていて、これらは同様の
機構になっているので以下旋回フレームの駆動装置を例
にとって説明する。
(Function) Normally, a hydraulic drive device of the type shown in Figure 3 is used to drive the revolving frame of the reclaimer or the wheel loader. The explanation will be given by taking a rotating frame driving device as an example.

第3図における番号20はポンプモータ、21はこのポ
ンプモータ20によって駆動される油圧ポンプ、22は
油供給管、23は出力軸23aを持った油圧モータ、2
4は油戻し管、25aは油圧ポンプ21より漏れた作動
油をタンクTに回収するドレン管、25bは油圧モータ
23より漏れた作動油をやはりタンクTに回収するドレ
ン管であり、ポンプモータ20にて油圧ポンプ21を作
動させることによって、作動油を油供給管22、油圧モ
ータ23を経由して油戻し管24、さらに油圧ポンプ2
0へと循環させ、旋回駆動装置あるいはホイル駆動装置
の減速機などに繋がる油圧モータ23の出力軸23aを
回転駆動させる。
In FIG. 3, numeral 20 is a pump motor, 21 is a hydraulic pump driven by this pump motor 20, 22 is an oil supply pipe, 23 is a hydraulic motor having an output shaft 23a, 2
4 is an oil return pipe, 25a is a drain pipe that collects the hydraulic oil leaking from the hydraulic pump 21 into the tank T, 25b is a drain pipe that also collects the hydraulic oil leaking from the hydraulic motor 23 into the tank T, and the pump motor 20 By operating the hydraulic pump 21 in
0, and rotates the output shaft 23a of the hydraulic motor 23 connected to the speed reducer of the swing drive device or the wheel drive device.

このような構成においては、通常圧力計Pによって作動
油の圧力を定期的に計測してその変動状況をチエツクし
、作動油の圧力に変動が生じた場合には、油圧ポンプ2
1あるいは油圧モータ23の性能を確保すべく、作動油
を油供給管22あるいは油戻し管24へ補給する必要が
あり、この場合には、作動油の補給をタンクTに繋がる
補給管26、補給ポンプ27、作動油の逆流防止用の逆
止弁28.29を介して補給していた。ここに、循環経
路内へ補給される作動油の圧力は予め所定の値に設定さ
れていて、圧力計Pによって検出された値よりも作動油
の圧力が低い場合には上述の経路を通して作動油が供給
され、作動油の補給圧力が設定値を上回ると圧力スイッ
チ30が作動して、電気的に繋がっている補給ポンプ2
7の駆動が停止され、補給管26の圧力が異常に高くな
った場合にはリリーフ弁31の回路を開にして作動油を
タンクTに戻すようになっている。なお、図中の32は
アキュームレータであって、このアキュームレータ32
は補給回路のハックアンプをする機能をもち、蓄圧管3
2aを介してアキュームレータ32内の作動油を補給管
26内へ送り込む。
In such a configuration, the pressure of the hydraulic oil is normally measured periodically using the pressure gauge P to check its fluctuations, and if the pressure of the hydraulic oil changes, the hydraulic pump 2
1 or in order to ensure the performance of the hydraulic motor 23, it is necessary to supply hydraulic oil to the oil supply pipe 22 or the oil return pipe 24. In this case, the hydraulic oil is supplied to the supply pipe 26 connected to the tank T, The oil was supplied via a pump 27 and check valves 28 and 29 for preventing backflow of hydraulic oil. Here, the pressure of the hydraulic oil supplied into the circulation path is set in advance to a predetermined value, and if the pressure of the hydraulic oil is lower than the value detected by the pressure gauge P, the hydraulic oil is supplied through the above-mentioned path. is supplied, and when the replenishment pressure of hydraulic oil exceeds the set value, the pressure switch 30 is activated and the replenishment pump 2 which is electrically connected
7 is stopped and the pressure in the supply pipe 26 becomes abnormally high, the circuit of the relief valve 31 is opened and the hydraulic oil is returned to the tank T. In addition, 32 in the figure is an accumulator, and this accumulator 32
has the function of hacking the supply circuit, and the accumulator tube 3
The hydraulic oil in the accumulator 32 is sent into the supply pipe 26 via 2a.

上記の構成になる従来の油圧系統においては、作動油の
循環経路全体の圧力変動をチエツクするにとどまるため
に、作動油の循環経路に複数の油圧ポンプや油圧モータ
が設置されている場合においては、何れの箇所に異常が
あるのか特定できず、したがってこの異常部位を検出す
るために多大の労力と時間が必要となり、また、リクレ
ーマにオペレータがいない場合には、作動油漏れによる
異常状態が長時間にわたってつづく事態になっていて迅
速な対処ができなかったのである。
In conventional hydraulic systems with the above configuration, pressure fluctuations in the entire hydraulic oil circulation path are checked; therefore, when multiple hydraulic pumps or hydraulic motors are installed in the hydraulic oil circulation path, , it is not possible to identify where the abnormality is, and therefore a great deal of effort and time is required to detect the abnormality.Furthermore, if there is no operator at the reclaimer, the abnormal condition due to hydraulic oil leakage may continue for a long time. The situation had been going on for a long time, and prompt action could not be taken.

そこで、この発明においては、上掲第2図に示すように
、作動油を循環させる油圧ポンプ21のドレン排出経路
であるドレン管25aと、リクレーマの旋回フレームあ
るいはホイルローダの駆動を司る油圧モータ23のドレ
ン排出経路になるドレン管25bのそれぞれの油流量を
、流量計Rによって計測するとともに、油圧ポンプと油
圧モータを繋く循環経路である油供給管22あるいは、
油戻し管24の油圧を圧力検出器P、によって計測し、
さらにアキュームレータ32の蓄圧管32aにおける内
圧をP2によって計測し、得られた各測定データと予め
定められた基準値を計算器Cによって所定の演算処理に
よってデータ処理を行い、各部における測定データが基
準値からはずれるような場合には警報出力を行うべく、
該計算機Cに接続したCRT34にて表示し常時監視で
きるようにした。したがって、リクレーマのホイルロー
ダや旋回フレーム駆動用装置の油圧系統の異常の有無を
早期に判定できる。
Therefore, in the present invention, as shown in FIG. 2 above, a drain pipe 25a which is a drain discharge path of a hydraulic pump 21 that circulates hydraulic oil, and a hydraulic motor 23 which controls the drive of a revolving frame of a reclaimer or a wheel loader. The oil flow rate of each drain pipe 25b, which is a drain discharge path, is measured by a flowmeter R, and the oil supply pipe 22, which is a circulation path connecting a hydraulic pump and a hydraulic motor, or
Measuring the oil pressure of the oil return pipe 24 with a pressure detector P,
Furthermore, the internal pressure in the pressure accumulation pipe 32a of the accumulator 32 is measured by P2, and the obtained measurement data and a predetermined reference value are processed by the calculator C through predetermined calculation processing, and the measurement data in each part is set to the reference value. In order to output an alarm in case of deviation from the
It was displayed on a CRT 34 connected to the computer C so that it could be constantly monitored. Therefore, it is possible to quickly determine whether there is an abnormality in the hydraulic system of the reclaimer's wheel loader or swing frame drive device.

(発明の効果) かくしてこの発明によれば、リクレーマの油圧駆動装置
の油圧ポンプあるいは油圧モータの油圧圧力及びドレン
排出量を常時オンラインで検知、判定することができ、
複数台設けられている油圧ポンプあるいは油圧モータの
異常、補給油圧ポンプあるいはアキュームレータの異常
を早期に判定できるので、異常が生じた場合でも従来の
ように多大な労力と時間を要することはなく適切な処置
を取り得る。
(Effects of the Invention) Thus, according to the present invention, the hydraulic pressure and drain discharge amount of the hydraulic pump or hydraulic motor of the hydraulic drive device of the reclaimer can be detected and determined online at all times.
Abnormalities in multiple hydraulic pumps or hydraulic motors, replenishment hydraulic pumps, or accumulators can be determined at an early stage, so even if an abnormality occurs, it is not necessary to take a large amount of effort and time and take appropriate action. Action can be taken.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図はりクレーマの構成説明図 第2図はこの発明に従う診断方法の要領説明図第3図は
従来方式に従う診断方法の要領説明図である。 1・・・地上コンベヤ   2・・・走行レール3・・
・走行装置     4・・・門形フレーム5・・・旋
回装置     6・・・旋回フレーム7・・・ブーム
      7a・・・ホイルローダ7b・・・コンベ
ア      8・・・シュート9・・・ウェイト  
    10・・・シーブ11・・・フレーム    
 lla・・・枢支ヒン12・・・俯仰ボスト    
13・・・フレーム14・・・シーブ      15
・・・俯仰装置16・・・ワイヤロープ   17・・
・コンベア駆動装置18・・・ホイルローダ駆動装置 19・・・旋回フレーム駆動装置 20・・・油圧ポンプモータ 21・・・油圧ポンプ2
2・・・油供給管     23・・・油圧モータ24
・・・油戻し管     25a、25b・・・ドレン
管26・・・補給管      27・・・補給ポンプ
28.29・・・逆止弁    30・・・圧力スイッ
チ31・・・リリーフ弁    32・・・アキューム
レータ33・・・圧力計      34・・・CRT
T・・・タンク PI+!・・・圧力計
FIG. 1 is an explanatory diagram of the structure of a beam cremer. FIG. 2 is an explanatory diagram of the outline of the diagnostic method according to the present invention. FIG. 3 is an explanatory diagram of the outline of the diagnostic method according to the conventional method. 1... Ground conveyor 2... Running rail 3...
・Traveling device 4...Portal frame 5...Swivel device 6...Swivel frame 7...Boom 7a...Wheel loader 7b...Conveyor 8...Chute 9...Weight
10... Sheave 11... Frame
lla...Pivotal Hin 12...Elevation Bost
13... Frame 14... Sheave 15
...Elevation device 16...Wire rope 17...
- Conveyor drive device 18...Wheel loader drive device 19...Swivel frame drive device 20...Hydraulic pump motor 21...Hydraulic pump 2
2...Oil supply pipe 23...Hydraulic motor 24
... Oil return pipe 25a, 25b ... Drain pipe 26 ... Supply pipe 27 ... Supply pump 28.29 ... Check valve 30 ... Pressure switch 31 ... Relief valve 32 ...・Accumulator 33...Pressure gauge 34...CRT
T...Tank PI+!・・・Pressure gauge

Claims (1)

【特許請求の範囲】 1、作動油を循環させる油圧ポンプと、この油圧ポンプ
より循環された作動油によって旋回フレームあるいはホ
イルローダを駆動する油圧モータを備えたリクレーマの
油圧駆動系統を診断するに当たり、 作動油を循環させる油圧ポンプのドレン排 出経路と、旋回フレームあるいはホイルローダの駆動を
司る油圧モータのドレン排出経路のそれぞれの油流量を
計測するとともに、油圧ポンプと油圧モータを繋ぐ循環
経路の油圧を計測し、得られた測定データと予め定めら
れた基準値を比較することにより、油圧ポンプ及び油圧
モータを含めた油圧駆動系統の異常の有無を検知するこ
とを特徴とするリクレーマの油圧駆動系統の診断方法。
[Claims] 1. In diagnosing the hydraulic drive system of a reclaimer equipped with a hydraulic pump that circulates hydraulic oil and a hydraulic motor that drives a swing frame or wheel loader using the hydraulic oil circulated by the hydraulic pump, In addition to measuring the oil flow rate in the drain discharge path of the hydraulic pump that circulates oil and the drain discharge path of the hydraulic motor that drives the swing frame or wheel loader, it also measures the oil pressure in the circulation path that connects the hydraulic pump and the hydraulic motor. A method for diagnosing a hydraulic drive system of a reclaimer, characterized in that the presence or absence of an abnormality in the hydraulic drive system including a hydraulic pump and a hydraulic motor is detected by comparing the obtained measurement data with a predetermined reference value. .
JP2315869A 1990-11-22 1990-11-22 Method for diagnosing hydraulic drive system of reclaimer Pending JPH04189223A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2315869A JPH04189223A (en) 1990-11-22 1990-11-22 Method for diagnosing hydraulic drive system of reclaimer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2315869A JPH04189223A (en) 1990-11-22 1990-11-22 Method for diagnosing hydraulic drive system of reclaimer

Publications (1)

Publication Number Publication Date
JPH04189223A true JPH04189223A (en) 1992-07-07

Family

ID=18070578

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2315869A Pending JPH04189223A (en) 1990-11-22 1990-11-22 Method for diagnosing hydraulic drive system of reclaimer

Country Status (1)

Country Link
JP (1) JPH04189223A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009143704A (en) * 2007-12-17 2009-07-02 Jfe Steel Corp Troubleshooting method for raw material yard movement machine
JP2013076444A (en) * 2011-09-30 2013-04-25 Hitachi Sumitomo Heavy Industries Construction Crane Co Ltd Hydraulic device
CN103072826A (en) * 2013-01-21 2013-05-01 中国神华能源股份有限公司 Variable amplitude device of material piling and taking device and material piling and taking device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56107537U (en) * 1980-01-18 1981-08-21
JPS63310422A (en) * 1987-06-11 1988-12-19 Ishikawajima Harima Heavy Ind Co Ltd Revolving float device for unloader
JPH02168004A (en) * 1988-12-19 1990-06-28 Komatsu Ltd Device for method for detecting hydraulic circuit failure

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56107537U (en) * 1980-01-18 1981-08-21
JPS63310422A (en) * 1987-06-11 1988-12-19 Ishikawajima Harima Heavy Ind Co Ltd Revolving float device for unloader
JPH02168004A (en) * 1988-12-19 1990-06-28 Komatsu Ltd Device for method for detecting hydraulic circuit failure

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009143704A (en) * 2007-12-17 2009-07-02 Jfe Steel Corp Troubleshooting method for raw material yard movement machine
JP2013076444A (en) * 2011-09-30 2013-04-25 Hitachi Sumitomo Heavy Industries Construction Crane Co Ltd Hydraulic device
CN103072826A (en) * 2013-01-21 2013-05-01 中国神华能源股份有限公司 Variable amplitude device of material piling and taking device and material piling and taking device

Similar Documents

Publication Publication Date Title
US5187973A (en) Leak monitor for hydraulic drive systems
US9678845B2 (en) Abnormality diagnostic system and industrial machinery
US8532865B2 (en) Apparatus and system for diagnosing devices included in working machine
CN109597344A (en) A kind of hydroelectric project steel arch-gate real time on-line monitoring system
CN110092140B (en) Driving device of heavy-load scraper conveyor and hydraulic system thereof
CN106467236B (en) Conveyer slides Detection & Controling
US20040213319A1 (en) System of monitoring operating conditions of rotating equipment
US20140236432A1 (en) Systems and methods for monitoring a fluid system of a mining machine
JPS5870078A (en) Supervising apparatus for screw compressor
JP2020169097A (en) Belt conveyor abnormality monitoring device, abnormality monitoring program and abnormality monitoring method
CN206192651U (en) Utensil gear information monitor function's high low temperature endurance test device of knob formula selector
JPH04189223A (en) Method for diagnosing hydraulic drive system of reclaimer
CN107246958A (en) The performance testing equipment and its test method of shield machine centre revolving joint
US5696331A (en) Apparatus for detecting metal powder amount in hydraulic circuit
KR100742964B1 (en) Tester for lifting oil pump of turbine of generator
CN110116892A (en) A kind of driving device for drag conveyor malfunction monitoring early warning system and method
CN104909138A (en) Conveyor roller bearing on-line monitoring system
JP2509646B2 (en) Abnormality monitoring device for hydraulic pressure generation equipment
JPH0526784A (en) Central control method for malfunction generation in construction machine
CN109292632B (en) Working method of multi-machine intelligent crane
JPS5983811A (en) Fault diagnostic device of hydraulic apparatus
CN207198184U (en) A kind of speed measuring device for lime stone bucket elevator
KR100838721B1 (en) An apparatus for detecting the damage of rollers in a belt conveyor
JPH0875617A (en) Fault diagnostic method of pump
JPH0337925A (en) Inspection apparatus for hydraulic operation system of disconnector