Oil system purification process method and oil system purification device of hydraulic coupler

Abstract

The invention relates to an oil system purification process method and an oil system purification device of a hydraulic coupler. The oil system purification process method comprises the steps that parts in an inner cavity of the hydraulic coupler are detached, and oil outlets in the inner wall of the inner cavity are exposed; an oil loop communicated with the oil outlet hole outside the hydraulic coupler is cut off; a cleaning medium is injected into the oil loop in the hydraulic coupler shell from the cut-off opening of the oil loop, and the cleaning medium overflows from the oil outlet hole; and the cleaning medium overflowing from the oil outlet hole is collected. According to the hydraulic coupler, the cleaning medium is injected into the oil loop in the coupler shell and flows towards the oil outlet hole along the oil loop, so that the oil loop is flushed, residual oil sludge or other impurities in the oil loop are flushed out, purification of the oil loop of the hydraulic coupler is achieved, the pressure stability of the oil loop is improved, and the service life of the hydraulic coupler is prolonged. Therefore, the bearing of the hydraulic coupler can be well and stably lubricated, and the operation health degree of the hydraulic coupler is improved.

Description

Technical Field

[0001] This application relates to the technical field of nuclear power plants, and particularly to an oil system purification process method and an oil system purification device for a hydraulic coupling. Background Art

[0002] In the field of nuclear power generation, the feedwater pump set in the APA (motor-driven main feedwater system) is an important power source for the feedwater of the second loop of the evaporator. The stability of its operation affects the power generation efficiency of the nuclear power plant unit. At the same time, as an important pump equipment in the conventional island of the nuclear power plant, the reliability of its service is an important part of the nuclear power safety guarantee link.

[0003] The hydraulic coupling is an important speed regulation device in the feedwater pump set of the motor-driven main feedwater system. It mainly has the following three functions in the second loop motor-driven main feedwater system of the nuclear power plant: First, the output speed of the motor is increased to the speed required by the pressure stage pump through the speed increasing gear. Second, when the power grid frequency fluctuates (such as below 50HZ or above 50HZ), it will cause a change in the water supply demand on the secondary side of the evaporator, thereby generating a signal to cause the hydraulic regulation of the scoop tube control mechanism of the hydraulic coupling, which drives the change in the position of the scoop tube in the volute of the hydraulic coupling, changes the working oil flow in the volute, and then changes the speed of the turbine shaft of the hydraulic coupling and the pressure stage pump, so as to achieve the purpose of speed regulation. Third, the turbine shaft rotates following the pump wheel shaft, which is realized through the working oil as the transmission medium. There is no actual mechanical connection, which can play a role in vibration prevention and isolation.

[0004] The hydraulic coupling needs to be regularly overhauled to maintain its working stability and safety. In the traditional overhaul process, only the components are disassembled for inspection and data measurement, lacking the cleaning process for the internal oil circuit of the hydraulic coupling body. There may be foreign matters remaining in the oil circuit, causing damage to mechanical and electrical equipment and even threatening nuclear safety. Summary of the Invention

[0005] Based on this, in view of the purification requirement problem of the oil system of the hydraulic coupling, it is necessary to provide an oil system purification process method and an oil system purification device for the hydraulic coupling.

[0006] In a first aspect, this application provides an oil system purification process method for a hydraulic coupling. The oil system purification process method for the hydraulic coupling includes:

[0007] Remove the components in the inner cavity of the hydraulic coupling to expose the oil outlet holes on the inner wall of the inner cavity;

[0008] Cut off the oil circuit outside the hydraulic coupling that communicates with the oil outlet holes;

[0009] Inject a cleaning medium into the oil circuit in the hydraulic coupling housing from the cut-off port of the oil circuit, and cause the cleaning medium to overflow from the oil outlet hole;

[0010] Collect the cleaning medium that overflows from the oil outlet hole.

[0011] In some embodiments, before the step of injecting a cleaning medium into the oil circuit in the hydraulic coupling housing from the cut-off port of the oil circuit and causing the cleaning medium to overflow from the oil outlet hole, the oil system purification process method of the hydraulic coupling further includes the steps of:

[0012] Block the oil outlet of the oil circuit outside the hydraulic coupling.

[0013] In some embodiments, in the step of injecting a cleaning medium into the oil circuit in the hydraulic coupling housing from the cut-off port of the oil circuit, the pressure of the cleaning medium is adjusted.

[0014] In some embodiments, the pressure of the cleaning medium is kept consistent with the design pressure value of the hydraulic coupling.

[0015] In some embodiments, in the step of collecting the cleaning medium that overflows from the oil outlet hole, an adapter is provided at the oil outlet hole, and the adapter is connected to an oil discharge pipe, so that the cleaning medium discharged from the oil outlet hole is discharged through the adapter and the oil discharge pipe for collection.

[0016] In some embodiments, after the step of collecting the cleaning medium that overflows from the oil outlet hole, the collected cleaning medium is sampled and tested.

[0017] In some embodiments, if the test result of the cleaning medium meets the preset requirements, stop injecting the cleaning medium into the oil circuit in the hydraulic coupling housing.

[0018] In a second aspect, the present application provides an oil system purification device, which is applied to the oil system purification process method of the hydraulic coupling in any of the above embodiments. The oil system purification device includes:

[0019] A flushing mechanism that can suck a cleaning medium and inject the sucked cleaning medium into the oil circuit to be purified;

[0020] A drainage and collection system that is connected to the oil outlet hole and is used to collect the cleaning medium that overflows from the oil outlet hole.

[0021] In some embodiments, the flushing mechanism includes:

[0022] A power oil pump;

[0023] A flushing inlet pipe, one end of the flushing inlet pipe is connected to the inlet of the power oil pump, and the other end is used to suck a cleaning medium under the power action of the power oil pump;

[0024] A flushing outlet pipe, one end of the flushing outlet pipe is connected to the outlet of the power oil pump, and the other end can be connected to the cut-off port of the oil circuit. The cleaning medium sucked by the flushing inlet pipe is injected into the oil circuit through the flushing outlet pipe.

[0025] In some embodiments, the flushing mechanism further includes:

[0026] A flushing filter, the flushing filter is arranged on the flushing outlet pipe and is used to filter the cleaning medium in the flushing outlet pipe.

[0027] In some embodiments, the flushing mechanism further includes:

[0028] A pressure sensor, the pressure sensor is arranged on the flushing outlet pipe;

[0029] A flowmeter, the flowmeter is serially arranged with the pressure sensor on the flushing outlet pipe;

[0030] A regulating valve, the regulating valve is arranged on the flushing outlet pipe and is located downstream of the flowmeter.

[0031] In some embodiments, the drainage and collection system includes:

[0032] A collection container;

[0033] A plurality of drainage pipes, one ends of the plurality of drainage pipes are connected to the collection container, and the other ends can be correspondingly connected to the oil outlet holes one by one.

[0034] In some embodiments, the drainage and collection system further includes:

[0035] A return main pipe, one end of the return main pipe is connected to the collection container, and the other end of the return main pipe can be connected to the inside of the inner cavity of the hydraulic coupler for discharging the cleaning medium in the inner cavity.

[0036] The above-mentioned oil system purification process method for the hydraulic coupling first removes the components inside the inner cavity of the hydraulic coupling, such as the input shaft, the driving shaft, and the driven shaft, etc. from the inner cavity to expose the oil outlet hole. Then, the oil circuit connected to the oil outlet hole is truncated, and a cleaning medium is injected into the oil circuit inside the coupling housing from the truncation port. The cleaning medium will flow towards the oil outlet hole along the oil circuit, achieving the effect of flushing the oil circuit, flushing out the residual sludge or other impurities in the oil circuit, realizing the purification of the oil circuit of the hydraulic coupling, thereby improving the pressure stability of the oil circuit to ensure good and stable lubrication of the bearings of the hydraulic coupling and improving the operation health of the hydraulic coupling.

[0037] Furthermore, for the problem of high water content in the oil circuit in the early stage, the effect of this purification process method is also very obvious. After the water content in the oil circuit is too high, under the precondition that the lubricating oil temperature rises, the lubricating oil will gradually emulsify, causing the relevant additives in the lubricating oil to form a micelle state, resulting in the failure of the relevant additives and also reducing the lubricating performance of the lubricating oil. At the same time, the water in the lubricating oil also reacts with the impurities in the lubricating oil, such as iron filings and other substances, to generate iron soap. The iron soap forms a sludge state with the larger colloidal particles in the lubricating oil, and the sludge adheres to and accumulates inside the oil circuit, causing insufficient throttling supply of the lubricating oil, thereby accelerating component wear and reducing the service life of the equipment. After flushing and purifying the oil circuit by using this oil system purification process method, the water content in the oil circuit can be significantly reduced, and the effect of solving the above problems is particularly remarkable. Brief Description of the Drawings

[0038] Figure 1 It is a schematic cross-sectional structure diagram of the hydraulic coupling provided in an embodiment of the present application;

[0039] Figure 2 It is a schematic partial structure diagram of the hydraulic coupling provided in an embodiment of the present application;

[0040] Figure 3 It is a flowchart of the oil system purification process method for the hydraulic coupling provided in an embodiment of the present application;

[0041] Figure 4 It is a schematic cooperation structure diagram of the oil system purification device and the hydraulic coupling provided in an embodiment of the present application Figure 1 ;

[0042] Figure 5 It is a schematic structure diagram of the flushing mechanism provided in an embodiment of the present application;

[0043] Figure 6 It is a schematic cooperation structure diagram of the oil system purification device and the hydraulic coupling provided in an embodiment of the present application Figure 2 。

[0044] Description of the Reference Numerals:

[0045] 100. Hydraulic coupling; 110. Coupling housing; 111. Inner cavity; 120. Oil circuit; 121. Lubricating oil circuit; 1211. Double row filter; 1212. Main pipeline; 12121. Cut-off flange; 1213. Branch pipeline; 1214. Lubricating oil pump; 1215. Lubricating oil return pipeline; 1216. Lubricating oil cooler; 122. Working oil circuit; 130. Input shaft; 140. Driving shaft; 150. Driven shaft; 160. Bearing bush; 161. Oil outlet hole; 170. Sealing tooling;

[0046] 200. Oil system purification device;

[0047] 210. Flushing mechanism; 211. Power oil pump; 2111. Frequency converter; 212. Flushing inlet pipe; 2121. Suction flange; 213. Flushing outlet pipe; 2131. Outlet flange; 214. Flushing filter; 215. Pressure sensor; 216. Flowmeter; 217. Pressure gauge; 218. Control valve; 2191. Control box; 2192. Base;

[0048] 220. Drainage and collection system; 221. Collection container; 222. Drainage pipe; 223. Isolation valve for collection device; 224. Return main pipe; 225. Impurity collection device; 226. Branch valve; 227. Throttling device;

[0049] 230. Oil supply tank. Detailed implementation manners

[0050] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe the detailed implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0051] In the description of the present application, it should be understood that if terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings. These are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application.

[0052] In addition, if the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0053] In this application, unless otherwise clearly specified and defined, if terms such as "installed", "connected", "joined", "fixed", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0054] In this application, unless otherwise clearly specified and defined, if there is a description such as a first feature being "on" or "under" a second feature, the meaning can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can mean that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0055] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are only for illustrative purposes and do not represent the only implementation.

[0056] Refer to Figure 1 and Figure 2 , Figure 1 is a schematic cross-sectional structure diagram of the hydraulic coupler 100 provided by an embodiment of this application; Figure 2FIG. 0 is a partial structural schematic diagram of a hydraulic coupler 100 provided in an embodiment of the present application. The hydraulic coupler 100 includes a coupler housing 110, and an inner cavity 111 is formed inside the coupler housing 110. Structures such as an input shaft 130, a driving shaft 140, and a driven shaft 150 are installed inside the coupler housing 110. Specifically, the input shaft 130 is meshed and connected to the driving shaft 140. By driving the input shaft 130 to rotate through a motor, the driving shaft 140 can be driven to rotate. The driven shaft 150 is coaxially arranged with the driving shaft 140, and hydraulic transmission is performed between the two through working oil. When the driving shaft 140 rotates, it drives the working oil to flow, and the flowing working oil drives the driven shaft 150 to rotate.

[0057] Optionally, the input shaft 130, the driving shaft 140, and the driven shaft 150 are all supported and fixed by bearing bushes 160. To ensure lubricity, oil outlet holes 161 are provided on the inner wall of the bearing bushes 160, and the oil outlet holes 161 can overflow lubricating oil to lubricate the input shaft 130, the driving shaft 140, and the driven shaft 150.

[0058] Specifically, the hydraulic coupler 100 includes an oil circuit, and the oil circuit forms an oil circuit circulation inside and outside the coupler housing 110 to provide lubrication, working fluid, etc. for the normal operation of each structure inside the coupler housing 110. Specifically, the oil circuit includes a lubricating oil circuit 121 and a working oil circuit 122. The main function of the lubricating oil circuit 121 is to lubricate the pump group and each bearing bush 160, and the main function of the working oil circuit 122 is to serve as the working fluid for transmitting torque between the pump impeller and the turbine.

[0059] The hydraulic coupler 100 can be in various structural forms in the prior art, and its detailed structure and working principle will not be elaborated here.

[0060] In the embodiment of the present application, it is mainly aimed at the flushing and purification of the lubricating oil circuit 121 of the hydraulic coupler 100. Therefore, the structure of the lubricating oil circuit 121 is further described in the present application. The lubricating oil circuit 121 includes a lubricating oil pump 1214, a lubricating oil cooler 1216, a lubricating oil inlet pipeline, and a lubricating oil return pipeline 1215. The lubricating oil pump 1214 is arranged on the lubricating oil return pipeline 1215 to provide power for the flow of lubricating oil between the lubricating oil inlet pipeline and the lubricating oil return pipeline 1215. The lubricating oil cooler 1216 is connected to the lubricating oil inlet pipeline and the lubricating oil return pipeline 1215. The lubricating oil in the inner cavity 111 returns to the lubricating oil cooler 1216 through the lubricating oil return pipeline 1215, and after being cooled by the lubricating oil cooler 1216, it enters the lubricating oil inlet pipeline.

[0061] The lubricating oil inlet pipeline includes a main pipeline 1212 and a plurality of branch pipelines 1213. One end of each branch pipeline 1213 is connected to the main pipeline 1212, and at least a part of each branch pipeline 1213 extends inside the coupling housing 110 and is connected to an oil outlet hole 161 on the bearing shell 160. The lubricating oil is branched from the main pipeline 1212 to each branch pipeline 1213 to reach a plurality of bearing shells 160, so as to achieve lubrication at multiple points. Optionally, a double-column filter 1211 is provided on the main pipeline 1212 to filter the lubricating oil through the double-column filter 1211, so as to improve the cleanliness of the lubricating oil and thus improve the lubrication effect.

[0062] For a long time, when the hydraulic coupling 100 is overhauled, only structures such as the input shaft 130, the driving shaft 140, and the driven shaft 150 are disassembled from the coupling housing 110, inspected, cleaned, and then reassembled. For the lubricating oil circuit 121, there has been no corresponding cleanliness inspection and verification process. It can be understood that the aperture of the oil outlet hole 161 is small, and the diameter of the branch pipeline 1213 is generally adapted to the size of the oil outlet hole 161. Oil sludge and even foreign impurities with larger sizes are extremely likely to accumulate inside the oil outlet hole 161 and the branch pipeline 1213. After being blocked, the lubricity is seriously affected, resulting in severe wear of the bearing shell 160 and each shaft.

[0063] Moreover, the branch pipeline 1213 is often arranged inside the coupling housing 110 and cannot be disassembled and cleaned, which causes great technical difficulties in cleaning and is also a technical blind spot currently encountered in the nuclear power plant field.

[0064] Based on the above problems, the embodiment of the present application provides an oil system purification process method for a hydraulic coupling to realize on-line cleaning of the oil circuit with a small aperture inside the hydraulic coupling 100. It should be noted that the oil system purification process method for the hydraulic coupling provided by the embodiment of the present application is not only applicable to the cleaning of the lubricating oil circuit 121 analyzed above, but also applicable to other pipelines in the hydraulic coupling 100 that require cleaning.

[0065] Please refer to Figure 3 , Figure 3 which is a flowchart of the oil system purification process method for the hydraulic coupling provided in an embodiment of the present application.

[0066] Specifically, the oil system purification process method for the hydraulic coupling includes the following steps:

[0067] S1: Remove the components inside the inner cavity 111 of the hydraulic coupling 100 to expose the oil outlet hole 161 on the inner wall of the inner cavity 111;

[0068] S2: Cut off the oil circuit 120 outside the hydraulic coupling 100 that communicates with the oil outlet hole 161;

[0069] S3: Inject clean cleaning medium into the oil circuit 120 in the coupler housing 110 of the hydrodynamic coupler 100 from the cut-off port of the oil circuit 120, and make the cleaning medium overflow from the oil outlet hole 161;

[0070] S4: Collect the cleaning medium overflowing from the oil outlet hole 161.

[0071] Wherein, the cleaning medium can be clean lubricating oil, or other inert gases or liquids.

[0072] The oil system purification process method of the hydrodynamic coupler provided by the embodiment of the present application first removes the components in the inner cavity 111 of the hydrodynamic coupler 100, such as the input shaft 130, the driving shaft 140, and the driven shaft 150, etc. from the inner cavity 111, so that the oil outlet hole 161 is exposed. Then, cut off the oil circuit 120 communicating with the oil outlet hole 161, and inject the cleaning medium into the oil circuit 120 in the coupler housing 110 from the cut-off port. The cleaning medium will flow along the oil circuit 120 towards the oil outlet hole 161, achieving the effect of flushing the oil circuit 120, so as to flush out the residual sludge or other impurities in the oil circuit 120, realizing the purification of the oil circuit 120 of the hydrodynamic coupler 100, thereby improving the pressure stability of the oil circuit 120, ensuring good and stable lubrication of the bearings of the hydrodynamic coupler 100, and improving the operation health of the hydrodynamic coupler 100.

[0073] Furthermore, for the problem of high water content in the oil circuit 120 in the early stage, the effect of this purification process method is also very obvious. After the water content in the oil circuit 120 is on the high side, under the precondition that the lubricating oil temperature rises, the lubricating oil will gradually emulsify, causing the relevant additives in the lubricating oil to form a micelle form, resulting in the failure of the relevant additive functions, and also reducing the lubrication performance of the lubricating oil. At the same time, the water in the lubricating oil also reacts with impurities in the lubricating oil, such as iron filings and other substances, to generate iron soap. The iron soap forms a sludge form with larger colloid particles in the lubricating oil, and the sludge adheres and accumulates inside the oil circuit 120, causing insufficient throttling oil supply of the lubricating oil, thereby accelerating component wear and reducing the service life of the equipment. After flushing and purifying the oil circuit 120 by using this oil system purification process method, the water content in the oil circuit 120 can be significantly reduced, and the solution effect for the above problems is particularly remarkable.

[0074] For the hydrodynamic coupler 100 provided in the embodiment of the present application, when flushing the oil circuit 120, cut off the main pipeline 1212, and inject clean cleaning medium into the main pipeline 1212 from the cut-off port on the side where the main pipeline 1212 is connected to the branch pipeline 1213, so that the cleaning medium flows into the multiple branch pipelines 1213 through the main pipeline 1212 and overflows from each oil outlet hole 161, so as to achieve the purpose of flushing and purifying each branch pipeline 1213 and the oil outlet hole 161.

[0075] Optionally, as shown in Figure 2 As shown, a cut-off flange 12121 is provided on the main pipeline 1212. Under normal working conditions, the cut-off flange 12121 is in a sealed connection state to keep the main pipeline 1212 in a connected state. When flushing and purifying is required, the main pipeline 1212 is cut off at the cut-off flange 12121 to form a cut-off port, and a cleaning medium is injected into the branch pipeline 1213 through the cut-off port.

[0076] In some embodiments, before step S3, the oil system purification process method of the hydraulic coupling further includes the following steps:

[0077] S30: Block the oil outlet of the oil circuit 120 outside the hydraulic coupling 100.

[0078] Through this step S30, during the flushing process, it is possible to prevent the cleaning medium from flowing out of the oil outlet. On the one hand, it can prevent the cleaning medium for flushing from overflowing from the oil outlet and affecting the flushing effect. On the other hand, it is beneficial to keep the environment around the hydraulic coupling 100 clean.

[0079] Specifically, as shown in Figure 2 the hydraulic coupling 100, the main pipeline 1212 extends in the coupling housing 110 and is connected to each branch pipeline 1213. At the same time, both ends of the main pipeline 1212 extend outside the coupling housing 110 to be connected to devices outside the hydraulic coupling 100 in the nuclear power plant. When flushing and purifying the lubricating oil circuit 121, the oil outlet hole where the main pipeline 1212 extends outside the coupling housing 110 needs to be blocked so that all the cleaning medium injected into the main pipeline 1212 enters the branch pipeline 1213.

[0080] Optionally, a connection flange is provided on the main pipeline 1212. The main pipeline 1212 can be cut off through the connection flange and then blocked by a blocking tool 170.

[0081] In some embodiments, please refer to Figure 3 , in step S3, the pressure of the cleaning medium is adjusted so that the cleaning medium for flushing in the oil circuit 120 reaches a more appropriate pressure, which not only ensures that the pressure is sufficient to flush away impurities but also does not damage the structure of the oil circuit 120 itself due to excessive pressure.

[0082] In some embodiments, the pressure of the cleaning medium is kept consistent with the design pressure value of the hydraulic coupling 100.

[0083] In some embodiments, in step S4, an adapter is provided at the oil outlet hole 161. The adapter is connected to the oil discharge pipeline so that the cleaning medium discharged from the oil outlet hole 161 is discharged through the adapter and the oil discharge pipeline for collection. After the flushing and purification is completed, the adapter can be removed.

[0084] In some embodiments, after step S4, the collected cleaning medium is sampled and detected to monitor the flushing process.

[0085] Specifically, if the detection result of the cleaning medium meets the preset requirements, injecting the clean cleaning medium into the oil circuit 120 in the housing of the hydraulic coupler 100 is stopped. When the detection result of the cleaning medium meets the preset requirements, it indicates that no impurities or only a small amount of impurities are flushed out of the oil circuit 120, and it can be known that the cleanliness of the oil circuit 120 meets the requirements.

[0086] Please refer to Figure 4 , Figure 4 which is a schematic diagram of the cooperation structure of the oil system purification device 200 and the hydraulic coupler 100 provided in an embodiment of the present application. Figure 1 .

[0087] An embodiment of the present application further provides an oil system purification device 200, which is applied to the oil system purification process method of the hydraulic coupler in the above embodiment. The oil system purification device 200 includes a flushing mechanism 210 and a drainage and collection system 220. The flushing mechanism 210 can suck the cleaning medium and inject the sucked cleaning medium into the oil circuit 120 to be purified. The drainage and collection system 220 is connected to the oil outlet hole 161 and is used to collect the cleaning medium overflowing from the oil outlet hole 161.

[0088] The oil system purification device 200 provided in the embodiment of the present application realizes the flushing of the oil circuit 120 by setting the flushing mechanism 210 to inject the cleaning medium into the oil circuit 120; and realizes the collection of the flushing cleaning medium by setting the drainage and collection system 220 to be connected to the oil outlet hole 161. By using the oil system purification device 200, the hydraulic coupler 100 can be flushed and purified by using the oil system purification process method of the hydraulic coupler.

[0089] Combined with Figure 4 and Figure 5 , Figure 5This is a schematic structural diagram of the flushing mechanism 210 provided in an embodiment of the present application. In some embodiments, the flushing mechanism 210 includes a power oil pump 211, a flushing inlet oil pipe 212, and a flushing outlet oil pipe 213. One end of the flushing inlet oil pipe 212 is connected to the inlet of the power oil pump 211, and the other end is used to suck the cleaning medium under the power of the power oil pump 211. One end of the flushing outlet oil pipe 213 is connected to the outlet of the power oil pump 211, and the other end can be connected to the cut-off port of the oil circuit 120. The cleaning medium sucked by the flushing inlet oil pipe 212 is injected into the oil circuit 120 through the flushing outlet oil pipe 213. When performing the flushing operation, the flushing inlet oil pipe 212, the flushing outlet oil pipe 213, the main pipeline 1212, the branch pipeline 1213, and the oil outlet hole 161 are connected. The power oil pump 211 is started to realize the flushing and purification of the main pipeline 1212, the branch pipeline 1213, and the oil outlet hole 161.

[0090] Optionally, referring to Figure 6 , the power oil pump 211 is provided with a frequency converter 2111 to achieve the functions of energy saving and speed regulation through the frequency converter 2111.

[0091] In some embodiments, the flushing mechanism 210 further includes a flushing filter 214. The flushing filter 214 is arranged on the flushing outlet oil pipe 213 and is used to filter the cleaning medium in the flushing outlet oil pipe 213 to ensure the cleanliness of the cleaning medium output by the flushing outlet oil pipe 213 and avoid introducing new impurities into the oil circuit 120 during the flushing process.

[0092] In some embodiments, the flushing mechanism 210 further includes a pressure sensor 215, a flowmeter 216, and a regulating valve 218. The pressure sensor 215 is arranged on the flushing outlet oil pipe 213. The flowmeter 216 is serially arranged with the pressure sensor 215 on the flushing outlet oil pipe 213. The regulating valve 218 is arranged on the flushing outlet oil pipe 213 and is located downstream of the flowmeter 216. The pressure sensor 215 is used to detect the pressure of the cleaning medium in the flushing outlet oil pipe 213, and the flowmeter 216 is used to detect the flow rate of the cleaning medium in the flushing outlet oil pipe 213. When the pressure sensor 215 and the flowmeter 216 detect that the pressure or flow rate of the cleaning medium in the flushing outlet oil pipe 213 does not meet the preset requirements, the opening degree of the regulating valve 218 is adjusted to adjust the pressure or flow rate of the cleaning medium to the required value.

[0093] Optionally, the flushing mechanism 210 further includes a pressure gauge 217. The pressure gauge 217 is arranged on the flushing outlet oil pipe 213 and can be arranged downstream of the flowmeter 216. The pressure gauge 217 is used to measure the pressure of the cleaning medium in the flushing outlet oil pipe 213.

[0094] In some embodiments, the flushing mechanism 210 further includes a control box 2191 which is communicatively connected to the above-mentioned power oil pump 211, pressure sensor 215, flowmeter 216, pressure gauge 217, regulating valve 218 and other structures, collects parameters of the above-mentioned structures, and controls the working states of the structures.

[0095] Optionally, the flushing mechanism 210 further includes a base 2192 which provides support for other structures of the flushing mechanism 210. Movable structures such as universal wheels can be provided at the bottom of the base 2192 to facilitate the movement of the flushing mechanism 210 and improve the flexibility of application.

[0096] Combined with Figure 6 shown, Figure 6 FIG. 220 is a schematic structural diagram of the cooperation between the oil system purification device 200 and the hydraulic coupler 100 provided in an embodiment of the present application. Figure 2 .

[0097] Specifically, the flushing mechanism 210 also needs to be configured with a supply oil tank 230 which contains a clean cleaning medium. The flushing inlet pipe 212 is communicated with the supply oil tank 230 to suck the cleaning medium from the supply oil tank 230. The flushing inlet pipe 212 can be directly connected and extended into the supply oil tank 230, or communicated with an output pipe provided on the supply oil tank 230. Optionally, the flushing inlet pipe 212 is provided with an oil suction flange 2121 to achieve quick connection with the output pipe provided on the supply oil tank 230 through the oil suction flange 2121.

[0098] Similarly, the flushing outlet pipe 213 is provided with an oil outlet flange 2131 to achieve quick connection with the main pipeline 1212 through the oil outlet flange 2131.

[0099] Please continue to refer to Figure 6 , in some embodiments, the drainage and collection system 220 includes a collection container 221 and a plurality of drainage pipes 222. One ends of the plurality of drainage pipes 222 are communicated with the collection container 221, and the other ends can be correspondingly connected to the oil outlet holes 161 one by one to drain the cleaning medium overflowing from the oil outlet holes 161 into the collection container 221 for storage.

[0100] In some embodiments, the drainage and collection system 220 further includes an impurity collection device 225 which is used to collect impurities in the lubricating fluid in the drainage pipes 222 or the collection container 221.

[0101] Optionally, the drainage and collection system 220 further includes a collection device isolation valve 223 which is provided on the drainage pipe 222 and is used to regulate the flow direction of the cleaning medium in the drainage pipe 222.

[0102] Optionally, the drainage collection system 220 further includes a branch valve 226 disposed on the drainage pipe 222 for regulating the flow rate of each drainage pipe 222.

[0103] Optionally, the drainage collection system 220 further includes a throttling device 227 disposed on the drainage pipe 222 for regulating the flow rate of each drainage pipe 222, which plays a role in energy conservation and consumption reduction.

[0104] In some embodiments, the drainage collection system 220 further includes a return main pipe 224. One end of the return main pipe 224 is connected to the collection container 221, and the other end of the return main pipe 224 can be internally connected to the inner cavity 111 of the hydraulic coupler 100 for discharging the cleaning medium in the inner cavity 111.

[0105] When the oil system purification device 200 provided by the embodiment of the present application performs a flushing operation on the hydraulic coupler 100, first, the components in the inner cavity 111 of the hydraulic coupler 100 are removed to expose the oil hole 161; and the main pipeline 1212 is truncated to form a truncated port; meanwhile, the oil outlet of the main pipeline 1212 outside the coupler housing 110 is blocked by the blocking tooling 170, and only a passage from the main pipeline 1212 and the branch pipeline 1213 to the oil hole 161 is maintained.

[0106] Then, the flushing outlet pipe 213 is connected to the truncated port on the side of the main pipeline 1212 connected to the branch pipeline 1213, and the flushing inlet pipe 212 is connected to the supply oil tank 230 to complete the connection between the flushing mechanism 210 and the hydraulic coupler 100.

[0107] After that, the drainage pipe 222 is connected to the oil hole 161 to complete the connection between the drainage collection system 220 and the hydraulic coupler 100.

[0108] Finally, the power oil pump 211 is started to start the flushing operation.

[0109] After flushing for a period of time, a cleaning medium sample is taken from the drainage pipe 222 for detection. If the detection result meets the preset requirements, the flushing is stopped; if the detection result does not meet the preset requirements, the flushing process continues. The detection work is repeated until the detection result meets the preset requirements.

[0110] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0111] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patented application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A purification process method for the oil system of a hydrodynamic coupling, characterized in that, The purification process method for the oil system of the hydraulic coupling includes: Remove the components inside the inner cavity (111) of the hydraulic coupling (100) to expose the oil outlet hole (161) on the inner wall of the inner cavity (111); Cut off the oil circuit (120) outside the hydraulic coupling (100) that is connected to the oil outlet hole (161); Inject a cleaning medium into the oil circuit (120) inside the housing of the hydraulic coupling (100) from the cut-off port of the oil circuit (120), and make the cleaning medium overflow from the oil outlet hole (161); Collect the cleaning medium that overflows from the oil outlet hole (161).

2. The purification process method of the oil system of the hydraulic coupling according to claim 1, characterized in that, Before the step of injecting a cleaning medium into the oil circuit (120) inside the housing of the hydraulic coupling (100) from the cut-off port of the oil circuit (120) and making the cleaning medium overflow from the oil outlet hole (161), the purification process method for the oil system of the hydraulic coupling further includes the step of: Block the oil outlet of the oil circuit (120) outside the hydraulic coupling (100).

3. The purification process method of the oil system of the hydraulic coupling according to claim 1, characterized in that, During the step of injecting a cleaning medium into the oil circuit (120) inside the housing of the hydraulic coupling (100) from the cut-off port of the oil circuit (120), adjust the pressure of the cleaning medium.

4. The purification process method of the oil system of the hydraulic coupling according to claim 3, characterized in that, The pressure of the cleaning medium is kept consistent with the design pressure value of the hydraulic coupling (100).

5. The purification process method of the oil system of the hydraulic coupling according to claim 1, characterized in that, During the step of collecting the cleaning medium that overflows from the oil outlet hole (161), a adapter is set at the oil outlet hole (161), and the adapter is connected to a drain pipe, so that the cleaning medium discharged from the oil outlet hole (161) is discharged through the adapter and the drain pipe for collection.

6. The purification process method of the oil system of the hydraulic coupling according to claim 1, characterized in that, After the step of collecting the cleaning medium that overflows from the oil outlet hole (161), sample and detect the collected cleaning medium.

7. The purification process method of the oil system of the hydraulic coupling according to claim 6, characterized in that, If the detection result of the cleaning medium meets the preset requirements, stop injecting the cleaning medium into the oil circuit (120) inside the housing of the hydraulic coupling (100).

8. An oil system purification device, characterized in that, Applied to the purification process method for the oil system of the hydraulic coupling as described in any one of claims 1 to 7, the oil system purification device (200) includes: A flushing mechanism (210) that can suck a cleaning medium and inject the sucked cleaning medium into the oil circuit (120) to be purified; A drainage and collection system (220) that is connected to the oil outlet hole (161) and is used to collect the cleaning medium that overflows from the oil outlet hole (161).

9. The oil system purification device according to claim 8, characterized in that, The flushing mechanism (210) includes: A power oil pump (211); A flushing inlet pipe (212), one end of the flushing inlet pipe (212) is connected to the inlet of the power oil pump (211), and the other end is used to suck a cleaning medium under the power action of the power oil pump (211); Flush the outlet oil pipe (213), one end of the flush outlet oil pipe (213) is connected to the outlet of the power oil pump (211), and the other end can be connected to the cut-off port of the oil circuit (120). The cleaning medium sucked by the flush inlet oil pipe (212) is injected into the oil circuit (120) through the flush outlet oil pipe (213).

10. The oil system purification device according to claim 9, characterized in that, The flushing mechanism (210) further includes: A flushing filter (214), which is arranged on the flush outlet oil pipe (213) and is used to filter the cleaning medium in the flush outlet oil pipe (213).

11. The oil system purification device according to claim 9, characterized in that, The flushing mechanism (210) further includes: A pressure sensor (215), which is arranged on the flush outlet oil pipe (213); A flowmeter (216), which is connected in series with the pressure sensor (215) and is arranged on the flush outlet oil pipe (213); A regulating valve (218), which is arranged on the flush outlet oil pipe (213) and is located downstream of the flowmeter (216).

12. The oil system purification device according to claim 9, characterized in that, The drainage and collection system (220) includes: A collection container (221); A plurality of drainage pipes (222), one end of each of the plurality of drainage pipes (222) is connected to the collection container (221), and the other end can be connected in one-to-one correspondence with the oil outlet hole (161).

13. The oil system purification device according to claim 12, characterized in that, The drainage and collection system (220) further includes: A return main pipe (224), one end of the return main pipe (224) is connected to the collection container (221), and the other end of the return main pipe (224) can be internally connected to the inner cavity (111) of the hydraulic coupler (100) for discharging the cleaning medium in the inner cavity (111).

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