JPS58200130A - Failure diagnostic apparatus for rotary oil hydraulic unit - Google Patents

Failure diagnostic apparatus for rotary oil hydraulic unit

Info

Publication number
JPS58200130A
JPS58200130A JP57081577A JP8157782A JPS58200130A JP S58200130 A JPS58200130 A JP S58200130A JP 57081577 A JP57081577 A JP 57081577A JP 8157782 A JP8157782 A JP 8157782A JP S58200130 A JPS58200130 A JP S58200130A
Authority
JP
Japan
Prior art keywords
pulsation
failure
hydraulic
rotary hydraulic
degree
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.)
Granted
Application number
JP57081577A
Other languages
Japanese (ja)
Other versions
JPH0247691B2 (en
Inventor
Ryuji Takabayashi
高林 隆二
Kiyoshi Nagasawa
潔 長澤
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.)
Hitachi Construction Machinery Co Ltd
Original Assignee
Hitachi Construction Machinery Co Ltd
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 Hitachi Construction Machinery Co Ltd filed Critical Hitachi Construction Machinery Co Ltd
Priority to JP57081577A priority Critical patent/JPS58200130A/en
Publication of JPS58200130A publication Critical patent/JPS58200130A/en
Publication of JPH0247691B2 publication Critical patent/JPH0247691B2/ja
Granted legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00Testing of machine parts

Abstract

PURPOSE:To easily make a correct diagnosis in a short time by an apparatus which comprises a pulsation detector for detecting oil pressure pulsation during operation, an arithmetic unit for judging the degree of failure based on output from the pulsation detector, a display for indicating the judged result, etc. CONSTITUTION:A failure diagnostic apparatus comprises an oil pressure pulsation detector 3 for detecting oil pressure pulsation of a rotary oil hydraulic unit, an arithmetic unit 6 for judging the degree of failure in the rotary oil hydraulic unit based on output from the pulsation detector 3, and a display 7 for indicating the result judged by the arithmetic unit 6. The pulsation detector 3 serves to detect oil pressure pulsation of the rotary oil hydraulic unit during operation, the arithemtic unit 6 serves to judge the degree of failure in the rotary oil hydraulic unit based on output from the pulsation detector, and the display 7 serves to indicate the result judged by the arithmetic unit 6. Thus, it becomes possible to make a correct diagnosis with ease in a short time.

Description

【発明の詳細な説明】 この発明は油圧ポンプ、油圧モータ等の回転式油圧機器
の故障を診断する装置に関するものである。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for diagnosing failures in rotary hydraulic equipment such as hydraulic pumps and hydraulic motors.

従来9回転式油圧機器の故障を診断するには。How to diagnose failures in conventional 9-rotation hydraulic equipment.

回転式油圧機器から発生する振動、音、温度などを診断
者が感覚で判断しているため2診断者の経験、。I8、
いいよきより、工。診断ヶ行うことができない。
The experience of 2 diagnosticians is that they judge vibrations, sounds, temperatures, etc. generated from rotary hydraulic equipment by feeling. I8,
Good luck, Kou. Diagnosis cannot be performed.

また、油圧ポンプの故障を診断するには、油圧ポンプの
吐出流量と吐出圧力との関係を検出し。
Furthermore, in order to diagnose a failure of a hydraulic pump, the relationship between the discharge flow rate and discharge pressure of the hydraulic pump is detected.

油圧ポンプが正常の場合の吐出流量と吐出圧力との関係
と比較することが行なわれている。さらに。
A comparison is made with the relationship between the discharge flow rate and the discharge pressure when the hydraulic pump is normal. moreover.

油圧モータの故障を診断するには、油圧モータに所定の
負荷を作用して、無効流出量を検出することが行われて
いる。すなわち9回転式油圧機器の故障を診断するだめ
に、容積効率(圧力、流量)を検出している。しかし2
回転式油圧機器においては、故障に至る寸前まで高い容
積効率を示し。
In order to diagnose a failure of a hydraulic motor, a predetermined load is applied to the hydraulic motor and an ineffective outflow amount is detected. In other words, volumetric efficiency (pressure, flow rate) is detected in order to diagnose failures in nine-rotary hydraulic equipment. But 2
Rotary hydraulic equipment exhibits high volumetric efficiency right up to the point of failure.

一旦故障の徴候が発生すると、容積効率は短時間に低下
し、故障に至る。これは回転式油圧機器の構成部品が機
械的な摩耗、劣化を起こしても、容積効率にはほとんど
影響を与えないだめである。
Once symptoms of failure occur, volumetric efficiency decreases within a short period of time, leading to failure. This means that even if the components of rotary hydraulic equipment undergo mechanical wear and deterioration, the volumetric efficiency will hardly be affected.

とくに、油圧ポンプの場合には、ポンプレギーレータに
よって吐出流量を容易に調整することができ、またメイ
ンリリーフ弁によって吐出圧力を容易に変えることが可
能であるから、油圧ポンプの’R1/を効$S#lTL
?も・−”的1容積効率を・復元   、することが容
易であるので9診断を正確に行うことができない。また
9回転式油圧機器の容積効率を検出するには、多くの時
間を要するとともに。
In particular, in the case of hydraulic pumps, the discharge flow rate can be easily adjusted with the pump regirator, and the discharge pressure can be easily changed with the main relief valve, so 'R1/ of the hydraulic pump can be effectively adjusted. $S#lTL
? Because it is easy to restore the volumetric efficiency of a rotary hydraulic device, it is difficult to accurately diagnose the volumetric efficiency of rotary hydraulic equipment. Also, it takes a lot of time and .

作業が面倒である。The work is troublesome.

この発明は上述の問題点を解決するためになされたもの
で、正確に、短時間にかつ容易に診断を行なうことがで
きる回転式油圧機器の故障診断装置を提供することを目
的とする。
The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a failure diagnosis device for rotary hydraulic equipment that can accurately perform diagnosis in a short period of time and easily.

この目的を達成するため、この発明においては脈動検出
装置により回転式油圧機器の作動時の油圧脈動を検出し
、演算装置により上記脈動検出装置の出力から上記回転
式油圧機器の故障度合を判断し9表示装置により上記演
算装置によって判定された結果を表示する。
In order to achieve this object, in the present invention, a pulsation detection device detects hydraulic pulsations during operation of the rotary hydraulic equipment, and a calculation device determines the degree of failure of the rotary hydraulic equipment from the output of the pulsation detection device. 9 displays the results determined by the arithmetic device.

ところで9回転式油圧機器においては、その作動時の油
圧脈動に各構成部品による油圧脈動が含まれている。そ
して、各構成部品による油圧脈動のピーク圧、振動数は
それぞれ相違するから9回転式油圧機器の作動時の油圧
脈動からある構成部品による油圧脈動を分離することが
できる。さらに、構成部品の損傷が大きくなると、構成
部品による油圧脈動のピーク圧が低くなり、まだ構成部
品による油圧脈動の立上り開始から立下り終了までの時
間すなわち脈動幅時間が長くなるから、構成部品による
油圧脈動のピーク圧、脈動幅時間を求めれば、構成部品
の故障度合を判定することができる。また、各構成部品
の故障度合と、その構成部品の回転式油圧機器に対する
重要度との積を求め、その積を積算すれば9回転式油圧
機器全体の故障度合を判定することができる。
By the way, in a nine-rotary hydraulic device, the hydraulic pulsation caused by each component is included in the hydraulic pulsation during its operation. Since the peak pressure and vibration frequency of the hydraulic pulsations due to each component are different, it is possible to separate the hydraulic pulsation due to a certain component from the hydraulic pulsation during operation of the 9-turn type hydraulic equipment. Furthermore, as the damage to the component increases, the peak pressure of the hydraulic pulsation due to the component decreases, and the time from the start of the rise to the end of the fall of the hydraulic pulsation due to the component, that is, the pulsation width time, increases. By determining the peak pressure and pulsation width time of hydraulic pulsation, the degree of failure of the component can be determined. Further, by calculating the product of the degree of failure of each component and the degree of importance of that component with respect to the rotary hydraulic equipment, and integrating the products, it is possible to determine the degree of failure of the entire nine-rotary hydraulic equipment.

たとえば9m本のプランジャを有するプランジャ油圧ポ
ンプにおいては、油圧ポンプが1回転すると、プランジ
ャ部による油圧脈動がm個生ずる。
For example, in a plunger hydraulic pump having 9 m of plungers, when the hydraulic pump rotates once, m hydraulic pulsations are generated by the plunger portion.

この油圧脈動を分離し、所定回転たとえば0回転分のピ
ーク圧、脈動幅時間を求め、それらのピーク圧、脈動幅
時間から代表ピーク圧9代表脈動幅時間を求めれば、プ
ランジャ部の故障度合を判定することができる。また、
各プランジャのピーク圧、脈動幅時間から、各プランジ
ャの代表ピーク圧9代表脈動幅時間を求めれば、各プラ
ンジャの故障度合を判定することができる。
By separating this hydraulic pulsation, determining the peak pressure and pulsation width time for a predetermined rotation, for example, 0 rotation, and determining the representative peak pressure 9 representative pulsation width time from these peak pressures and pulsation width time, the degree of failure of the plunger part can be determined. can be determined. Also,
By determining the representative peak pressure 9 representative pulsation width time of each plunger from the peak pressure and pulsation width time of each plunger, the degree of failure of each plunger can be determined.

第1図はこの発明に係る回転式油圧機器の故障診断装置
を示す図である。図において1はm本のプランジャを有
するプランジャ油圧ポンプ、2は油圧ポンプ1の吐出側
管路、6は管路2内の油圧脈動を電圧変化に変換する油
圧脈動検出器、4は油圧脈動検出器6の出力を増幅する
増幅器で、油圧脈動検出器6.増幅器4で脈動検出装置
を構成する。5は増幅器4の出力から油圧ポンプ1のプ
ランジャ部による油圧脈動に相当する電圧変化を取出す
分離・ろ波器、6は分離・ろ波器5の出力からプランジ
ャ部による油圧脈動の代表脈動幅時間を求める演算器で
9分離・ろ波器5.演算器6で演算装置を構成する。7
は演算器6によって判定された結果を表示する表示装置
である。
FIG. 1 is a diagram showing a failure diagnosis device for rotary hydraulic equipment according to the present invention. In the figure, 1 is a plunger hydraulic pump having m plungers, 2 is a discharge side pipe of the hydraulic pump 1, 6 is a hydraulic pulsation detector that converts hydraulic pulsations in the pipe 2 into voltage changes, and 4 is a hydraulic pulsation detector. This is an amplifier that amplifies the output of the hydraulic pulsation detector 6. The amplifier 4 constitutes a pulsation detection device. 5 is a separation/filter that extracts the voltage change corresponding to the hydraulic pulsation caused by the plunger section of the hydraulic pump 1 from the output of the amplifier 4; 6 is a representative pulsation width time of the hydraulic pulsation caused by the plunger section from the output of the separation/filter 5; 9 separation/filter 5. The arithmetic unit 6 constitutes an arithmetic device. 7
is a display device that displays the results determined by the calculator 6.

この故障診断装置においては9回転数を一定にし、かつ
吐出圧力を一定にして、油圧ポンプ1を運転し、この状
態で油圧脈動検出器3により管路2内の油圧脈動を電圧
変化に変換する。つぎに。
In this failure diagnosis device, the hydraulic pump 1 is operated with a constant rotation speed and a constant discharge pressure, and in this state, the hydraulic pulsation detector 3 converts the hydraulic pulsation in the conduit 2 into voltage changes. . next.

増幅器4により油圧脈動検出器5の出力を増幅し。The output of the hydraulic pulsation detector 5 is amplified by the amplifier 4.

分離・ろ波器5でプランジャ部による油圧脈動に相当す
る電圧変化を取出す。この電圧変化は第2図、第6図(
第2図はプランジャ部が正常な場合。
A separation/filter 5 extracts voltage changes corresponding to hydraulic pulsations due to the plunger section. This voltage change is shown in Figures 2 and 6 (
Figure 2 shows when the plunger part is normal.

第3図はプランジャ部が損傷した場合を示す)に示すよ
うになる。そして、演算器乙においては。
Figure 3 shows the case where the plunger part is damaged. And in the computing unit O.

まず第2図、第3図に示す電圧変化がその谷にあたる電
圧■。と所定の電圧■cとを加算した値以上となる時間
すなわち脈動幅時間Tll HT21 +・・・・・・
+ Trnn金求める。つぎに、第4図、第5図(第4
図は正′吊な場合、第5図は損傷した場合を示す)に示
すように、脈動幅時間T11等の頻度分布を求め1個数
が最も多い脈動幅時間すなわち代表脈動幅時間Tを求め
る。さらに2代表脈動幅時間Tを表示装置7に表示する
First, the voltage change shown in Figures 2 and 3 is the voltage ■ whose valley corresponds to the voltage change. and the predetermined voltage ■c, that is, the pulsation width time Tll HT21 +...
+ Trnn seeking gold. Next, Fig. 4 and Fig. 5 (Fig. 4
The frequency distribution of the pulsation width time T11, etc. is determined, and the pulsation width time with the largest number of pulsation widths, ie, the representative pulsation width time T, is determined as shown in FIG. Furthermore, two representative pulsation width times T are displayed on the display device 7.

なお、第1図に示す実施例においては2代表脈動幅時間
Tを求めたが、第2図、第3図に示す各ピークの電圧値
から電圧■o+vcを減算しだ値すなわちピーク電圧v
11 + ”21 +・・・・・・+ Vmn (ピー
ク圧に対応する)を求め、つぎにピーク電圧v11等の
頻度分布を求めて、さらに個数が最も多いピーク電圧す
なわち代表ピーク電圧■を求めてもよい。さらに+T、
t、TI□、・・・・・・、Tlnは第1のプランジャ
による脈動幅時間+  T21+ T2□、・・・・・
・l T2nは第2のプランジャによる脈動幅時間、・
・・・・、 Tm+ 、 Tm2+・・・・・・、Tm
nは第mのプランジャによる脈動幅時間であるから。
In the example shown in FIG. 1, two representative pulsation width times T were obtained, but the value obtained by subtracting the voltage o+vc from the voltage value of each peak shown in FIGS. 2 and 3, that is, the peak voltage v
11 + "21 +......+ Vmn (corresponding to the peak pressure) is determined, then the frequency distribution of the peak voltage v11 etc. is determined, and the peak voltage with the largest number, that is, the representative peak voltage ■ is determined. You can also add +T,
t, TI□, ......, Tln is the pulsation width time by the first plunger + T21 + T2□, ...
・l T2n is the pulsation width time due to the second plunger,・
..., Tm+, Tm2+..., Tm
This is because n is the pulsation width time caused by the m-th plunger.

第6図、第7図(第6図は正常な場合、第7図は損傷し
た場合を示す)に示すように、各プランジャごとに脈動
幅時間の頻度分布を求め、各プランジャごとに代表脈動
幅時間T、、T2.・・・・・・+ Trnを求めても
よい。また、同様にして、第8図、紀9図(第8図は正
常な場合、第9図は損傷した場合を示す)に示すように
、各プランジャごとにピーク電圧の頻度分布を求め、各
プランジャごとに代表ピーク電圧V、、V2.・・・・
・’+ vmを求めてもよい。さらに、プランジャ部の
損傷が大きくなると1代表脈動幅時間T、T1.・・・
・・・、Tm9m9代表ビークV、Vl、・・・・・・
、Vmの個数すなわち最多個数N7. NTI 、・・
・・・・、NTm。
As shown in Figures 6 and 7 (Figure 6 shows the normal case and Figure 7 shows the damaged case), the frequency distribution of the pulsation width time is determined for each plunger, and the representative pulsation is calculated for each plunger. Width time T,, T2. ......+ Trn may also be obtained. Similarly, as shown in Figures 8 and 9 (Figure 8 shows the normal case and Figure 9 shows the damaged case), calculate the frequency distribution of the peak voltage for each plunger, and Typical peak voltage V, , V2. for each plunger.・・・・・・
・'+vm may also be calculated. Furthermore, if the damage to the plunger section becomes large, one representative pulsation width time T, T1. ...
..., Tm9m9 representative beak V, Vl, ...
, Vm, that is, the maximum number N7. NTI...
..., NTm.

Nv、Nvl、・・・・・・、Nvmが少なくなるから
、最多個数NT等を一求−めでもよい。捷た2代表脈動
幅時間T等。
Since Nv, Nvl, . 2 representative pulsation width times T, etc.

代表ピーク電圧V等、最多個数NT、 Nv等を総合判
断することにより、プランジャ部、各プランジャの故障
度合を判定してもよい。
The degree of failure of the plunger section and each plunger may be determined by comprehensively determining the representative peak voltage V, the maximum number NT, Nv, etc.

さらに、上述実施例においては、プランジャ油圧ポンプ
について説明したが、ベーン油圧ポンプ。
Furthermore, in the above embodiments, a plunger hydraulic pump has been described, but a vane hydraulic pump has been described.

歯車油圧ポンプについても、同様に故障を診断すること
ができる。すなわち、油圧ポンプが1回転すると、ベー
ン油圧ポンプにおいては、ベーンの枚数に応じた油圧脈
動が生じ、歯車油圧ポンプに1、・いては、歯車の歯数
に応じた油圧脈動が生じるので、これらの油圧脈動から
ベーン部、各ベーン。
Failures of gear hydraulic pumps can also be diagnosed in the same way. In other words, when a hydraulic pump rotates once, a vane hydraulic pump generates hydraulic pulsations corresponding to the number of vanes, and a gear hydraulic pump generates hydraulic pulsations corresponding to the number of gear teeth. Hydraulic pulsation from the vane section, each vane.

歯車部、歯車の各歯の故障度合を判定することができる
。なお、プランジャ油圧ポンプのプランジャ部の故障と
しては、プランジャを支えるシリンダ部の摩耗、プラン
ジャとプランジャ摺動面との間に設けられたシューの摩
耗、軸を支える軸受の劣化、可変容量形であれば、斜板
もしくは斜軸を支える軸の劣化などが主ガものである。
It is possible to determine the degree of failure of the gear part and each tooth of the gear. In addition, failures of the plunger part of a plunger hydraulic pump include wear of the cylinder part that supports the plunger, wear of the shoe provided between the plunger and the plunger sliding surface, deterioration of the bearing that supports the shaft, and even if the pump is of a variable displacement type. For example, the main cause is deterioration of the swash plate or the shaft that supports the slant shaft.

また、ベーン油圧ポンプのベーン部の故障としては、ベ
ーンの摩耗、ベーンロータを支持する軸受の劣化。
In addition, failures in the vane part of vane hydraulic pumps include wear of the vanes and deterioration of the bearings that support the vane rotor.

ベーンの側面に設けられた油漏れ防止用プレートの摩耗
、ペーツ外周に設けられ九ノ・ウジングの内側の摩耗な
どが主なものである。さらに、歯車油圧ポンプにおいて
は、歯面の摩耗、一対の歯車を支える軸受の劣化、一対
の歯車の側面に設けられた油漏れ防止用プレートの摩耗
、歯車外周に設けられたハウジングの内側摩耗などが主
なものである。また、上述実施例においては、油圧ポン
プの故障診断装置について説明しだが、油圧モータにお
いても同様に故障を診断することができる。この場合、
油圧モータの吐出側管路の油圧脈動を検出する。さらに
、上述実施例においては、プランジャ部、各プランジャ
の代表脈動幅時間T、 T1等。
The main causes include wear on the oil leakage prevention plate installed on the side of the vane, and wear on the inside of the nine-rings installed around the outer periphery of the blade. Furthermore, in gear hydraulic pumps, there are many problems such as wear on the tooth surfaces, deterioration of the bearings that support the pair of gears, wear on the oil leakage prevention plates provided on the sides of the pair of gears, and wear on the inside of the housing provided around the outer periphery of the gears. is the main thing. Further, in the above-described embodiment, a failure diagnosis device for a hydraulic pump is described, but failures can be similarly diagnosed for a hydraulic motor as well. in this case,
Detects hydraulic pulsation in the discharge side pipe of the hydraulic motor. Furthermore, in the above embodiment, the representative pulsation width time T, T1, etc. of the plunger portion and each plunger.

代表ピーク電圧V、 Vl等、最多個数N、 N1等を
求めたが、脈動幅時間T11.・・・・・・+ Tmn
の平均値+ Ttt、 TI□。
Although the representative peak voltages V, Vl, etc., the maximum number N, N1, etc. were determined, the pulsation width time T11.・・・・・・+ Tmn
Average value of + Ttt, TI□.

・・・・・・+ T’tnの平均値環、ピーク電圧v1
1+・・・・・・、■mnの平均値+  V11+ v
1□、・・・・・・、vlnの平均値等を求めてもよい
・・・・・・+ Average value ring of T'tn, peak voltage v1
1+..., ■mn average value + V11+ v
1□, ..., the average value of vln, etc. may be calculated.

以上説明したように、この発明に係る回転式油圧機器の
故障診断装置においては1回転式油圧機器の油圧脈動を
検出し、この油圧脈動から故障を;′ 診断するから、正確に故障を予知することができるので
、故障による事故を未然に防止することが可能である。
As explained above, the failure diagnosis device for rotary hydraulic equipment according to the present invention detects the hydraulic pulsation of the single-rotary hydraulic equipment and diagnoses the failure from this hydraulic pulsation, so it can accurately predict the failure. Therefore, it is possible to prevent accidents due to malfunctions.

また、管路に脈動検出装置を取付けるだけで1回転式油
圧機器の故障を診断することができるから、短時間にか
つ容易に診断を行うことができる。このように、この発
明の効果は顕著である。
Moreover, since it is possible to diagnose a failure in a one-rotation type hydraulic device simply by attaching a pulsation detection device to the conduit, the diagnosis can be easily performed in a short time. As described above, the effects of this invention are remarkable.

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

第1図はこの発明に係る回転式油圧機器の故障診断装置
を示す図、第2図、第5図はプランジャ部による油圧脈
動に相当する電圧変化を示す図。 第4図、第5図は脈動幅時間の頻度分布を示す図。 第6図、第7図は各プランジャごとの脈動幅時間の頻度
分布を示す図、第8図、第9図は各プラン/ヤごとのピ
ーク電圧O瀕葉吻布を示す図−である。 1・・・プランジャ油圧ポンプ 2・・・管路       3・・・油圧脈動検出器4
・・・増幅器      5・・・分離・ろ波器6・・
・演算器      7・・・表示装置代理人弁理士 
 中 村 純之助    11−4 図   ”1昭5
8−200130(5)1’5図 脈動幅時間 ′41″6図 (a)    (b)    (c)     (d)
1’7図 (a)    (b)    (C)      (d
。 矛8図 (Q)     (b)      (C)     
  (d)矛9図
FIG. 1 is a diagram showing a failure diagnosis device for rotary hydraulic equipment according to the present invention, and FIGS. 2 and 5 are diagrams showing voltage changes corresponding to hydraulic pulsations caused by a plunger portion. FIG. 4 and FIG. 5 are diagrams showing frequency distribution of pulsation width time. 6 and 7 are diagrams showing the frequency distribution of pulsation width time for each plunger, and FIGS. 8 and 9 are diagrams showing the peak voltage O for each plunger. 1...Plunger hydraulic pump 2...Pipeline 3...Hydraulic pulsation detector 4
...Amplifier 5...Separator/filter 6...
・Calculator 7...Display device agent patent attorney
Junnosuke Nakamura 11-4 Figure ”1 1975
8-200130 (5) Figure 1'5 Pulsation width time '41'' Figure 6 (a) (b) (c) (d)
Figure 1'7 (a) (b) (C) (d
. Spear 8 (Q) (b) (C)
(d) Illustration 9 of spears

Claims (9)

【特許請求の範囲】[Claims] (1)回転式油圧機器の作動時の油圧脈動を検出する脈
動検出装置と、その脈動検出装置の出力から上記回転式
油圧機器の故障度合を判定する演q装置と、この演算装
置によって判定された結果を表示する表示装置とを具備
することを特徴とする回転式油圧機器の故障診断装置。
(1) A pulsation detection device that detects hydraulic pulsation during operation of a rotary hydraulic device, a calculation device that determines the degree of failure of the rotary hydraulic device from the output of the pulsation detection device, and a calculation device that determines the degree of failure of the rotary hydraulic device. What is claimed is: 1. A failure diagnosis device for rotary hydraulic equipment, comprising: a display device for displaying the results of the test.
(2)上記脈動検出装置として、上記油圧脈動を電圧変
化に変換し、増幅するものを用いたことを特徴とする特
許請求の範囲第1項記載の回転式油圧機器の故障診断装
置。
(2) The failure diagnosis device for rotary hydraulic equipment according to claim 1, wherein the pulsation detection device is one that converts the hydraulic pulsation into a voltage change and amplifies it.
(3)上記演算装置ト?とじて、上記脈動検出装置の出
力から上記油圧脈動の立上り開始から立下り終了までの
脈動幅時間を求めるものを用いたことを特徴とする特許
請求の範囲第1項または第2項記載の回転式油圧機器の
故障診断装置。
(3) The above calculation device? The rotation according to claim 1 or 2, characterized in that the pulsation width time from the start of rise to the end of fall of the hydraulic pulsation is determined from the output of the pulsation detection device. Fault diagnosis device for type hydraulic equipment.
(4)上記演算装置として、上記脈動幅時間の頻度分布
を求め9個数が最も多い脈動幅時間を求めるものを用い
たことを特徴とする特許請求の範囲第5項記載の回転式
油圧機器の故障診断装置。
(4) The rotary hydraulic equipment according to claim 5, characterized in that the arithmetic device is one that calculates the frequency distribution of the pulsation width times and calculates the pulsation width times with the largest number of 9 pieces. Fault diagnosis device.
(5)上記演算装置として、上記脈動検出装置の出力か
ら上記油圧脈動のピーク圧を求めるものを用いたことを
特徴とする特許請求の範囲第1項または第2項記載の回
転式油圧機器の故障診断装置。
(5) The rotary hydraulic equipment according to claim 1 or 2, characterized in that the calculation device is one that calculates the peak pressure of the hydraulic pulsation from the output of the pulsation detection device. Fault diagnosis device.
(6)上記演算装置として、上記ピーク圧の頻度分布を
求め9個数が最も多いピーク圧を求めるものを用いたこ
とを特徴とする特許請求の範囲第5項記載の回転式油圧
機器の故障診断装置。
(6) Failure diagnosis of rotary hydraulic equipment according to claim 5, characterized in that the calculation device is one that calculates the frequency distribution of the peak pressures and determines the peak pressure having the largest number of 9 peak pressures. Device.
(7)上記演算装置として、プランジャ部、ベーン部、
歯車部による油圧脈動から故障度合を判定するものを用
いたことを特徴とする特許請求の範囲第1項ないし第6
項のいずれかに記載の回転式油圧機器の故障診断装置。
(7) The above calculation device includes a plunger part, a vane part,
Claims 1 to 6 are characterized in that the method uses a device that determines the degree of failure from hydraulic pulsation caused by a gear part.
A failure diagnosis device for rotary hydraulic equipment according to any one of paragraphs.
(8)上記演算装置として、上記プランジャ部の各″プ
ランジャ、上記ベーン部の各ベーン、上記菌中部の歯車
の各歯の故障度合を判定するものを用いたことを特徴と
する特許請求の範囲第7項記載の回転式油圧機器の故障
診断装置。
(8) The scope of claims characterized in that the computing device is one that determines the degree of failure of each plunger of the plunger section, each vane of the vane section, and each tooth of the gear in the middle part of the bacteria. The failure diagnosis device for rotary hydraulic equipment according to item 7.
(9)上記演算装置として、上記回転式油圧機器の各構
成部品の故障度合を求め、その構成部品の上記回転式油
圧機器に対する重要度と上記故障度合との積を求め、そ
の積を積算するものを用いたことを特徴とする特許請求
の範囲第1項ないし第6項のいずれかに記載の回転式油
圧機器の故障診断装置。
(9) The arithmetic unit calculates the degree of failure of each component of the rotary hydraulic equipment, calculates the product of the degree of importance of that component to the rotary hydraulic equipment and the degree of failure, and integrates the products. 7. A failure diagnosis device for rotary hydraulic equipment according to any one of claims 1 to 6, characterized in that a device is used.
JP57081577A 1982-05-17 1982-05-17 Failure diagnostic apparatus for rotary oil hydraulic unit Granted JPS58200130A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57081577A JPS58200130A (en) 1982-05-17 1982-05-17 Failure diagnostic apparatus for rotary oil hydraulic unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57081577A JPS58200130A (en) 1982-05-17 1982-05-17 Failure diagnostic apparatus for rotary oil hydraulic unit

Publications (2)

Publication Number Publication Date
JPS58200130A true JPS58200130A (en) 1983-11-21
JPH0247691B2 JPH0247691B2 (en) 1990-10-22

Family

ID=13750157

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57081577A Granted JPS58200130A (en) 1982-05-17 1982-05-17 Failure diagnostic apparatus for rotary oil hydraulic unit

Country Status (1)

Country Link
JP (1) JPS58200130A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006517277A (en) * 2003-02-10 2006-07-20 フロー インターナショナル コーポレイション Apparatus and method for detecting malfunctions in a high pressure fluid pump

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4930901A (en) * 1972-07-18 1974-03-19

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4930901A (en) * 1972-07-18 1974-03-19

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006517277A (en) * 2003-02-10 2006-07-20 フロー インターナショナル コーポレイション Apparatus and method for detecting malfunctions in a high pressure fluid pump
JP4762130B2 (en) * 2003-02-10 2011-08-31 フロー インターナショナル コーポレイション Apparatus and method for detecting malfunctions in a high pressure fluid pump

Also Published As

Publication number Publication date
JPH0247691B2 (en) 1990-10-22

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