TWM522186U - Apparatus for monitoring hydraulic machines of vessel - Google Patents
Apparatus for monitoring hydraulic machines of vessel Download PDFInfo
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Description
本新型是有關於一種包含複數個油壓致動器(稱為油壓缸、油壓馬達等)之船舶之油壓機器的監視裝置。 The present invention relates to a monitoring device for a hydraulic machine of a ship including a plurality of hydraulic actuators (referred to as hydraulic cylinders, hydraulic motors, etc.).
通常，在設置於船舶的絞車、起重機、小艇吊架、及舵機等，設置有複數個油壓致動器(例如，參照專利文獻1)。作為將壓油輸送至該等油壓致動器的機構，有串聯油壓線路與並聯油壓線路等。 In general, a plurality of hydraulic actuators are provided in a winch, a crane, a boat hanger, a steering gear, and the like provided in a ship (for example, refer to Patent Document 1). As a mechanism for conveying the pressure oil to the hydraulic actuators, there are a series hydraulic circuit and a parallel hydraulic circuit.
因為串聯油壓線路是串聯地連接運轉複數個油壓致動器之切換閥(valve)，因此通過油壓線路的油量為一定，所需動力是伴隨壓力的變動而上下變化。即是說，由於從泵流往油壓線路的油是設定成最大油量，因此以高負載使用需要油量較少之絞車時，會消耗超過需要的能量。又，因為油壓泵之最大油量經常會流動於配管內，因此有所謂即使在無負載的情況，也會因為配管阻力而使待機狀態之油壓泵的所需動力變高的問題。 Since the series hydraulic circuit is a valve that connects a plurality of hydraulic actuators in series, the amount of oil passing through the hydraulic circuit is constant, and the required power is changed up and down with a change in pressure. That is to say, since the oil flowing from the pump to the hydraulic circuit is set to the maximum amount of oil, when a winch requiring a small amount of oil is used at a high load, more energy than necessary is consumed. In addition, since the maximum oil amount of the hydraulic pump often flows in the pipe, there is a problem that the required power of the hydraulic pump in the standby state is increased due to the pipe resistance even when there is no load.
另一方面，因為在並聯油壓線路是並聯地連接各 油壓致動器，以藉由可變容量油壓泵使壓力保持一定的方式，只放出需要量之壓油，因此在沒有使用各油壓致動器的情況下，油壓泵之放出量大約為零，油壓泵之驅動用動力為最少便完成，相較於串聯油壓線路有節約能源的優點。可是，因為自油壓泵的放出壓力為一定，因此會有在運轉之油壓致動器的動作壓力較低之情況下其差量會成為能量損失的問題。 On the other hand, because the parallel hydraulic circuits are connected in parallel The hydraulic actuator releases only a required amount of pressure oil in such a manner that the pressure is kept constant by the variable-capacity hydraulic pump, so that the hydraulic pump is discharged without using each hydraulic actuator It is about zero, and the driving force of the hydraulic pump is completed at the least, which has the advantage of saving energy compared to the series hydraulic circuit. However, since the discharge pressure from the hydraulic pump is constant, there is a problem that the difference is caused by the energy loss when the operating pressure of the hydraulic actuator is low.
進而，有將並聯式改良，油壓式(即機械式)地檢測各油壓致動器之運轉壓，將可變容量油壓泵之放出壓控制為各油壓致動器所需要之最大壓力的油壓式負載感測系統(例如，參照專利文獻2)。 Further, the parallel type is improved, and the operating pressure of each hydraulic actuator is detected hydraulically (ie, mechanically), and the discharge pressure of the variable displacement hydraulic pump is controlled to be the maximum required for each hydraulic actuator. A hydraulic oil pressure sensing system of pressure (for example, refer to Patent Document 2).
【專利文獻1】日本專利特開平6-316292號公報 [Patent Document 1] Japanese Patent Laid-Open No. Hei 6-316292
【專利文獻2】日本專利特開平6-344991號公報 [Patent Document 2] Japanese Patent Laid-Open No. Hei 6-344991
可是，因為前述之油壓式負載感測系統需要從各油壓致動器之控制閥(切換閥)到油壓泵的控制用油壓配管，因此在具有多數個油壓致動器，且並聯使用複數個油壓泵之船舶中難以採用。 However, since the aforementioned hydraulic load sensing system requires a hydraulic valve for controlling the hydraulic pump from the control valve (switching valve) of each hydraulic actuator, it has a plurality of hydraulic actuators, and It is difficult to use in ships that use multiple hydraulic pumps in parallel.
本新型是有鑑於如此情事而作成者，其目的在於提供一種在使並聯配管線路進一步發展之油壓式負載感測 系統(油壓線路)中，使包含油壓致動器、油壓泵及其切換閥之油壓機器的配管容易，且可以管理油壓機器之船舶之油壓機器的監視裝置。 The present invention has been made in view of such circumstances, and its object is to provide a hydraulic load sensing for further development of a parallel piping circuit. In the system (hydraulic line), the piping of the hydraulic equipment including the hydraulic actuator, the hydraulic pump, and the switching valve is easy, and the monitoring device of the hydraulic machine of the ship of the hydraulic machine can be managed.
遵循前述目的之第1新型之船舶之油壓機器的監視裝置是一種船舶之油壓機器的監視裝置，該船舶之油壓機器具有：油壓致動器，成為船舶之各機器的驅動源；油壓源，具有複數個油壓泵；及切換閥，配置於該油壓源及前述各油壓致動器之間，改變油朝前述油壓致動器的流動方向並調整其流量，該船舶之油壓機器的監視裝置的特徵在於：於前述各切換閥與連接該切換閥之前述油壓致動器之間設置壓力檢出器，將該壓力檢出器之電輸出導向位在前述船舶內之控制盤，將基於前述壓力檢出器之電輸出而判斷之前述各油壓致動器的運作狀況顯示於連接前述控制盤之1個或者是複數個監測器，並且記錄於前述控制盤。 A monitoring device for a hydraulic machine for a ship according to a first aspect of the present invention is a monitoring device for a hydraulic device for a ship, the hydraulic device of the ship having a hydraulic actuator that serves as a drive source for each of the ships; a hydraulic source having a plurality of hydraulic pumps; and a switching valve disposed between the hydraulic source and each of the hydraulic actuators, changing a flow direction of the oil toward the hydraulic actuator and adjusting a flow rate thereof, A monitoring device for a hydraulic machine for a ship is characterized in that a pressure detector is provided between each of the switching valves and the hydraulic actuator connected to the switching valve, and the electric output of the pressure detector is guided to the foregoing a control panel in the ship, wherein the operation status of each of the hydraulic actuators determined based on the electrical output of the pressure detector is displayed on one or a plurality of monitors connected to the control panel, and recorded in the foregoing control plate.
又，第2新型之船舶之油壓機器的監視裝置是於第1新型之船舶之油壓機器的監視裝置中，連同前述各油壓致動器之運作狀況，亦一併將前述各油壓致動器之累積運作時間顯示於前述監測器。 Further, the monitoring device of the hydraulic device for a ship of the second type is the monitoring device of the hydraulic device for a ship of the first type, and the operation state of each of the hydraulic actuators described above, and the respective hydraulic pressures The cumulative operating time of the actuator is shown in the aforementioned monitor.
第3新型之船舶之油壓機器的監視裝置是於第1新型之船舶之油壓機器的監視裝置中，連同前述各油壓致動器之運作狀況，亦一併將前述各油壓泵之累積運作時間顯示於前述監測器。 The monitoring device for the hydraulic machine for a ship according to the third aspect is the monitoring device of the hydraulic device for a ship of the first type, and the operation state of each of the hydraulic actuators described above, and the hydraulic pumps are also used. The cumulative operating time is shown in the aforementioned monitor.
接著，第4新型之船舶之油壓機器的監視裝置是 於第1~第3新型之船舶之油壓機器的監視裝置中，於前述控制盤包含油壓控制部，該油壓控制部控制前述油壓源之壓力為前述各油壓致動器之運轉油壓中的最大油壓。 Next, the monitoring device of the hydraulic machine of the fourth type of ship is In the monitoring device for a hydraulic machine for a ship according to the first to third aspects, the control panel includes a hydraulic pressure control unit that controls the pressure of the hydraulic pressure source to operate the hydraulic actuators. The maximum oil pressure in oil pressure.
在第1~第4新型之船舶之油壓機器的監視裝置中，於各油壓致動器與其切換閥之間設置壓力檢出器，將其電輸出導向在船舶內之控制盤，因此沒有需要設置控制用的油壓配管，可使油壓線路的施工簡單化。 In the monitoring device for the hydraulic machine of the first to fourth types of ships, a pressure detector is provided between each hydraulic actuator and its switching valve, and the electric output is guided to the control panel in the ship, so there is no It is necessary to provide a hydraulic piping for control, which simplifies the construction of the hydraulic circuit.
又，可藉由監測器目視確認各油壓致動器之運作壓力(即運作狀況)，因此可以監視各油壓致動器。 Further, the operating pressure (i.e., the operating condition) of each of the hydraulic actuators can be visually confirmed by the monitor, so that the hydraulic actuators can be monitored.
特別是在第2新型之船舶之油壓機器的監視裝置中，可以由壓力檢出器之運轉時間計測各油壓致動器之累積運作時間，因此可以進行各油壓致動器之壽命管理。 In particular, in the monitoring device of the hydraulic machine for a ship of the second type, the cumulative operation time of each hydraulic actuator can be measured from the operation time of the pressure detector, so that the life management of each hydraulic actuator can be performed. .
在第3新型之船舶之油壓機器的監視裝置中，亦一併將各油壓泵之累積運作時間顯示於監測器，因此可以預測油壓泵之壽命。 In the monitoring device of the hydraulic machine for a ship of the third type, the cumulative operation time of each hydraulic pump is also displayed on the monitor, so that the life of the hydraulic pump can be predicted.
尤其，船舶之油壓致動器或油壓泵的壽命管理極為重要，藉由本新型之船舶之油壓機器的監視裝置，可以更適切地管理油壓致動器。 In particular, the life management of a hydraulic actuator or a hydraulic pump of a ship is extremely important, and the hydraulic actuator of the marine hydraulic machine of the present invention can more appropriately manage the hydraulic actuator.
接著，在第4新型之船舶之油壓機器的監視裝置中，於控制盤包含油壓控制部，該油壓控制部將油壓源之壓力控制為各油壓致動器之最大油壓，因此可使使用於油壓線路之能量最小化。 Next, in the monitoring device of the hydraulic machine for a ship according to the fourth aspect, the control panel includes a hydraulic pressure control unit that controls the pressure of the hydraulic pressure source to the maximum hydraulic pressure of each hydraulic actuator. Therefore, the energy used in the hydraulic circuit can be minimized.
10‧‧‧船舶之油壓機器的監視裝置 10‧‧‧Monitoring device for hydraulic equipment of ships
11‧‧‧油壓泵 11‧‧‧Hydraulic pump
12‧‧‧油壓源 12‧‧‧ Oil source
13‧‧‧切換閥 13‧‧‧Switching valve
14‧‧‧油壓致動器 14‧‧‧Hydraulic actuator
15‧‧‧壓力檢出器 15‧‧‧Pressure Detector
16‧‧‧電磁比例式壓力控制閥 16‧‧‧Electromagnetic proportional pressure control valve
17‧‧‧控制盤 17‧‧‧Control panel
18‧‧‧油壓控制部 18‧‧‧Hydraulic Control Department
19‧‧‧監測器 19‧‧‧Monitor
圖1是本新型一實施形態中船舶之油壓機器的監視裝置之概略方塊圖。 Fig. 1 is a schematic block diagram of a monitoring device for a hydraulic machine for a ship according to an embodiment of the present invention.
在圖2中，(A)是表示適用本新型一實施形態之船舶之油壓機器的監視裝置時油之流量、壓力、所需動力之關係的圖表，(B)是表示於船舶之油壓裝置使用串聯油壓線路時的流量、壓力、所需動力之關係的圖表，(C)是表示於船舶之油壓裝置使用並聯油壓線路時的流量、壓力、所需動力之關係的圖表。 In Fig. 2, (A) is a graph showing the relationship between the flow rate, the pressure, and the required power of the oil when the monitoring device for the hydraulic device of the ship according to the embodiment of the present invention is applied, and (B) is the oil pressure of the ship. (C) is a graph showing the relationship between the flow rate, the pressure, and the required power when the hydraulic pressure device of the ship uses the parallel hydraulic circuit.
接下來，一邊參照附加之圖式，一面就有關將本新型具體化之實施形態進行說明。如圖1所示，本新型之一實施形態中船舶之油壓機器的監視裝置10具有油壓源12、複數個油壓致動器14及壓力檢出器15，該油壓源12具有複數個(此實施形態中為4個)油壓泵11，前述複數個油壓致動器14分別透過切換閥13連接油壓源12，並且為船舶之各機器的驅動源，前述壓力檢出器15設於各切換閥13與油壓致動器14之高壓油供油側之間。來自各壓力檢出器15之電訊號(電輸出)被輸入至位在船舶內之控制盤17的油壓控制部18，並透過電磁比例式壓力控制閥16進行各油壓泵11的控制。 Next, an embodiment in which the present invention is embodied will be described with reference to the attached drawings. As shown in Fig. 1, a monitoring device 10 for a hydraulic device for a ship according to an embodiment of the present invention has a hydraulic source 12, a plurality of hydraulic actuators 14, and a pressure detector 15, which has a plurality of hydraulic sources 12 The hydraulic pump 11 (four in this embodiment), the plurality of hydraulic actuators 14 are respectively connected to the hydraulic source 12 via the switching valve 13, and are the driving sources of the respective machines of the ship, and the pressure detector 15 is provided between each of the switching valves 13 and the high pressure oil supply side of the hydraulic actuator 14. The electric signals (electrical outputs) from the respective pressure detectors 15 are input to the hydraulic pressure control unit 18 of the control panel 17 in the ship, and are controlled by the hydraulic proportional pressure control valves 16 for the respective hydraulic pumps 11.
使用並聯連接之可變容量型的油壓泵作為油壓泵11，該等油壓泵11是藉由電磁比例式壓力控制閥16來控制，且調整放出之壓油的壓力並輸送到各切換閥13。切換 閥13通常是手動閥(也可以是電磁閥)，藉由手柄操作，進行：1)停止油壓致動器14、2)正方向(例如，正轉)或逆方向(例如，逆轉)地輸油到油壓致動器14、及3)調整輸送至油壓致動器14之壓油的流量。 As the hydraulic pump 11 using a variable displacement type hydraulic pump connected in parallel, the hydraulic pumps 11 are controlled by the electromagnetic proportional pressure control valve 16, and the pressure of the discharged pressurized oil is adjusted and sent to each switching. Valve 13. Switch The valve 13 is typically a manual valve (also a solenoid valve) that is operated by the handle to: 1) stop the hydraulic actuator 14, 2) in the positive direction (eg, forward rotation) or reverse direction (eg, reverse) The oil delivery to the hydraulic actuators 14, and 3) adjusts the flow rate of the pressurized oil delivered to the hydraulic actuator 14.
壓力檢出器15偵測各油壓致動器14之運轉壓力，且將其電訊號輸送至控制盤17。油壓致動器14是由例如油壓缸或油壓馬達構成，且壓力檢出器15檢測各油壓致動器14之對應負載的壓力。於控制盤17設置油壓控制部18，記錄藉由各壓力檢出器15所檢測到之壓力資料，並且將記錄之資料與時間一同輸出至監測器19。在此，可基於該壓力資料(與時間)來判斷各油壓致動器14之運作狀況，且將該運作狀況顯示於監測器19。然後，將該運作狀況記錄於控制盤17。 The pressure detector 15 detects the operating pressure of each of the hydraulic actuators 14 and transmits its electrical signal to the control panel 17. The hydraulic actuator 14 is constituted by, for example, a hydraulic cylinder or a hydraulic motor, and the pressure detector 15 detects the pressure of the corresponding load of each hydraulic actuator 14. The hydraulic pressure control unit 18 is provided on the control panel 17, and the pressure data detected by each pressure detector 15 is recorded, and the recorded data is output to the monitor 19 together with the time. Here, the operation status of each hydraulic actuator 14 can be judged based on the pressure data (with time), and the operation status is displayed on the monitor 19. Then, the operation status is recorded on the control panel 17.
進一步，油壓控制部18檢測以各壓力檢出器15所檢測到的壓力(油壓致動器14之運轉油壓)中的最大壓力(油壓)P，輸送至電磁比例式壓力控制閥16並控制成使油壓源12之壓力成為最大壓力P。又，在油壓控制部18中，由各油壓致動器14之壓力與運轉時間演算累積運作時間，並且將各油壓致動器14之運轉壓力及累積運作時間顯示於監測器19。 Further, the hydraulic pressure control unit 18 detects the maximum pressure (hydraulic pressure) P among the pressures detected by the respective pressure detectors 15 (the operating hydraulic pressure of the hydraulic actuator 14), and delivers them to the electromagnetic proportional pressure control valve. 16 is controlled such that the pressure of the oil pressure source 12 becomes the maximum pressure P. Further, in the hydraulic pressure control unit 18, the cumulative operation time is calculated from the pressure and the operation time of each hydraulic actuator 14, and the operating pressure and the accumulated operation time of each hydraulic actuator 14 are displayed on the monitor 19.
因此，關於以比最大壓力P低之壓力進行運轉的油壓致動器14，構造成以切換閥13進行其壓力調整(即，流量調整)，使油壓致動器14可以維持預定之負載壓力。 Therefore, the hydraulic actuator 14 that operates at a pressure lower than the maximum pressure P is configured to perform its pressure adjustment (i.e., flow rate adjustment) with the switching valve 13, so that the hydraulic actuator 14 can maintain a predetermined load. pressure.
在此，例如，在切換閥13進行新的負載選擇，藉由壓 力檢出器15所測量之各油壓致動器14的壓力變成比最大壓力P低之壓力時，檢測最大壓力P1(<P)，以油壓控制部18控制電磁比例式壓力控制閥16使壓力源12之壓力為P1，並且將來自各油壓泵11之供給壓降為P1。 Here, for example, a new load selection is made at the switching valve 13 by pressing When the pressure of each of the hydraulic actuators 14 measured by the force detector 15 becomes lower than the maximum pressure P, the maximum pressure P1 (<P) is detected, and the hydraulic pressure control unit 18 controls the electromagnetic proportional pressure control valve 16 The pressure of the pressure source 12 is made P1, and the supply pressure from each hydraulic pump 11 is lowered to P1.
藉此，因為迅速地切換來自油壓泵11之壓力，因此相較於並聯油壓線路式之油壓構成，能量消耗減少，且來自各壓力檢出器15之訊號變成通過纜線內的電訊號。所以，能夠以電進行訊號的傳送接收，因此相較於向來之使用控制用之油壓配管的情況，施工變得容易。 Thereby, since the pressure from the hydraulic pump 11 is quickly switched, the energy consumption is reduced as compared with the hydraulic pressure type of the parallel hydraulic line type, and the signal from each pressure detector 15 becomes a telecommunication through the cable. number. Therefore, since the signal can be transmitted and received by electricity, the construction becomes easy compared to the case of the hydraulic pressure pipe for the control use.
又，如同前述，在控制盤17(詳細而言為油壓控制部18)中，累積計算來自壓力檢出器15之輸出，而關於各油壓致動器14，則演算自使用開始時(所謂，船舶最初下水之時)起之累積運作時間(累積計算運作時間)並作為資料記錄於記憶體且顯示於監測器19。 Further, as described above, in the control panel 17 (more specifically, the hydraulic pressure control unit 18), the output from the pressure detector 15 is cumulatively calculated, and with respect to each of the hydraulic actuators 14, the calculation starts from the start of use ( The cumulative operation time (accumulated calculation operation time) from the time when the ship was first launched is recorded in the memory and displayed on the monitor 19.
藉此，知道各油壓致動器14之使用時間，在事故發生之前，可以推定各油壓致動器14之檢查及更換時期。 Thereby, the use time of each hydraulic actuator 14 is known, and the inspection and replacement timing of each hydraulic actuator 14 can be estimated before an accident occurs.
進一步，控制盤17之油壓控制部18演算各油壓泵11之累積運作時間，並記錄於控制盤17，且顯示於監測器19。藉此，可以進行油壓泵11之保養檢查、更換。 Further, the hydraulic pressure control unit 18 of the control panel 17 calculates the cumulative operation time of each of the hydraulic pumps 11, and records it on the control panel 17 and displays it on the monitor 19. Thereby, maintenance inspection and replacement of the hydraulic pump 11 can be performed.
在圖2(B)中，表示習知例之串聯油壓線路之油的流量、壓力、所需動力的關係，然而與油壓致動器之流量無關(因此，即使是少量)，需要一定的動力。 In Fig. 2(B), the relationship between the flow rate, the pressure, and the required power of the oil in the series hydraulic circuit of the conventional example is shown. However, regardless of the flow rate of the hydraulic actuator (thus, even a small amount), it is necessary to be constant. Power.
在圖2(C)中，表示習知例之並聯油壓線路之油的流量、壓力、所需動力的關係，然而與個別之油壓致動器的 使用壓力無關，需要相應於全體流量之所需動力。 In Fig. 2(C), the relationship between the flow rate, the pressure, and the required power of the oil of the parallel hydraulic circuit of the conventional example is shown, but with the individual hydraulic actuators. Irrespective of the use of pressure, the required power corresponding to the total flow is required.
另一方面，在使用圖1所示構成之船舶之油壓機器的監視裝置10之負載感測式的油壓線路中，如圖2(A)所示，所需動力為壓力與油之流量的函數，無論壓力與油之流量之任一者較小的情況所需動力都會減少。而且，即使有多數個油壓致動器，由於不需要控制用之油壓配管，因此可以謀求油壓線路之簡單化。 On the other hand, in the load-sensing hydraulic circuit of the monitoring device 10 of the hydraulic machine using the ship shown in Fig. 1, as shown in Fig. 2(A), the required power is the flow of pressure and oil. The function, regardless of whether the pressure and oil flow are smaller, the power required will be reduced. Further, even if there are a plurality of hydraulic actuators, since the hydraulic piping for control is not required, the hydraulic circuit can be simplified.
本新型不限定於前述之實施形態，在不變更本新型要旨之範圍內亦可以變更其構成。例如，本新型不限定於油壓泵之個數、油壓致動器之個數。 The present invention is not limited to the above-described embodiments, and the configuration may be modified within the scope not departing from the gist of the present invention. For example, the present invention is not limited to the number of hydraulic pumps and the number of hydraulic actuators.
又，油壓控制部亦可以將來自各壓力檢出器之輸入訊號進行數位變換，例如，以微電腦(microcomputer)、可程式控制器(programmable controller)等，演算最大之壓力值及各油壓致動器之累積運作時間，並顯示於監測器。進而，連接控制盤之監測器亦可以是複數個以對應用途。 Moreover, the hydraulic pressure control unit can digitally convert the input signals from the pressure detectors, for example, using a microcomputer (microcomputer) or a programmable controller to calculate the maximum pressure value and each hydraulic pressure. The cumulative operating time of the actuator is displayed on the monitor. Furthermore, the monitors connected to the control panel can also be plural for corresponding purposes.
10‧‧‧船舶之油壓機器的監視裝置 10‧‧‧Monitoring device for hydraulic equipment of ships
11‧‧‧油壓泵 11‧‧‧Hydraulic pump
12‧‧‧油壓源 12‧‧‧ Oil source
13‧‧‧切換閥 13‧‧‧Switching valve
14‧‧‧油壓致動器 14‧‧‧Hydraulic actuator
15‧‧‧壓力檢出器 15‧‧‧Pressure Detector
16‧‧‧電磁比例式壓力控制閥 16‧‧‧Electromagnetic proportional pressure control valve
17‧‧‧控制盤 17‧‧‧Control panel
18‧‧‧油壓控制部 18‧‧‧Hydraulic Control Department
19‧‧‧監測器 19‧‧‧Monitor
Claims (4)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015003348U JP3199844U (en) | 2015-07-01 | 2015-07-01 | Ship oil pressure monitoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| TWM522186U true TWM522186U (en) | 2016-05-21 |
Family
ID=54188412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| TW104215208U TWM522186U (en) | 2015-07-01 | 2015-09-21 | Apparatus for monitoring hydraulic machines of vessel |
Country Status (4)
| Country | Link |
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| JP (1) | JP3199844U (en) |
| KR (1) | KR200484130Y1 (en) |
| CN (1) | CN205059984U (en) |
| TW (1) | TWM522186U (en) |
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|---|---|---|---|---|
| CN107965494A (en) * | 2017-10-12 | 2018-04-27 | 武汉船用机械有限责任公司 | A kind of rotary vane type steering gear failure detector and method |
| KR20230097385A (en) | 2021-12-24 | 2023-07-03 | 엄근섭 | Hydraulic monitoring system used in hydraulic equipment |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2584371Y2 (en) * | 1992-10-12 | 1998-10-30 | 株式会社小松製作所 | Excavator operation status grasping device |
| JPH06316292A (en) | 1993-05-07 | 1994-11-15 | Mitsubishi Heavy Ind Ltd | Hydraulic steering system with emergency steering gear |
| JPH06344991A (en) | 1993-06-02 | 1994-12-20 | Yanmar Diesel Engine Co Ltd | Auxiliary machinery driving apparatus for ship |
| JP5669520B2 (en) * | 2010-10-27 | 2015-02-12 | ヤンマー株式会社 | Work vehicle |
| KR20140010368A (en) * | 2010-12-27 | 2014-01-24 | 볼보 컨스트럭션 이큅먼트 에이비 | Energy recycling system for a construction apparatus |
| JP5841741B2 (en) * | 2011-04-26 | 2016-01-13 | ナブテスコ株式会社 | Aircraft actuator controller |
-
2015
- 2015-07-01 JP JP2015003348U patent/JP3199844U/en active Active
- 2015-09-21 TW TW104215208U patent/TWM522186U/en unknown
- 2015-10-13 KR KR2020150006682U patent/KR200484130Y1/en active IP Right Grant
- 2015-10-20 CN CN201520812888.9U patent/CN205059984U/en active Active
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| Publication number | Publication date |
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| KR20170000174U (en) | 2017-01-11 |
| JP3199844U (en) | 2015-09-10 |
| CN205059984U (en) | 2016-03-02 |
| KR200484130Y1 (en) | 2017-08-03 |
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