CN110743854A - Cylinder hydraulic unit oil feeding tool and cleaning process thereof - Google Patents

Abstract

The invention discloses an oil feeding tool for a hydraulic unit of a cylinder and a cleaning process thereof, wherein the tool comprises: the oil collecting tank of the HCU base plate is sequentially communicated with an oil return block assembly, a one-stage or multi-stage oil return filtering system and the hydraulic header pipe, and the distributing block comprises an oil inlet part of the distributing block, a high-pressure ball valve, a main oil hole of the distributing block, a multi-way valve and the bottom of the distributing block, which are sequentially communicated through a pipeline. The advantages are that: the design of each oil way in the distribution block realizes the cleaning of the distribution block, namely the cleaning of the cylinder hydraulic unit before the large folding of the diesel engine, and the design of the pipeline ensures the oil feeding cleaning effect, saves the time consumed in the oil feeding cleaning process, relieves the pressure of resource shortage of a test run platform of a diesel engine plant, effectively saves the time cost and the fund consumption, and improves the efficiency of industrial production.

Description

Cylinder hydraulic unit oil feeding tool and cleaning process thereof

Technical Field

The invention relates to the field of cylinder hydraulic units, in particular to an oil feeding tool for a cylinder hydraulic unit and a cleaning process thereof.

Background

The cylinder hydraulic unit (HCU) provides hydraulic power for various control valves and hydraulic execution parts, and is the most important hydraulic system in ME-C series diesel engines. Cleaning of the inner cavities of the components in the HCU system is particularly important, and fine impurities can cause the mating parts in the control valve to stick and cause failure. In the HCU, the distribution block is a carrier of each part in the HCU and is also a source of hydraulic oil of each part, so the cleanliness of the inner cavity of the distribution block is most important, but the inner structure of the distribution block is complex, the inner cavity of the distribution block cannot be cleaned in place only by a manual cleaning mode, and the inner cavity of the distribution block needs to be cleaned by other means.

Generally, the oil feeding and cleaning of the cylinder hydraulic unit assembly is to mount the HCU assembly on the diesel engine and to take up a diesel engine test run platform and an auxiliary machine system to carry out oil feeding and cleaning, and is to clean the whole diesel engine oil way system (not only to the HCU assembly).

Generally, the cleaning requirements of an HCU assembly of an electrically controlled diesel engine are as follows: the HCU is cleaned before assembly, and oil is thrown for cleaning before test run. Because the resource of the test run platform of the diesel engine plant is short, the HCU assembly has the highest requirement on cleanness, the consumed cleaning time is longest, the whole oil feeding and cleaning process needs about seven days, and a single oil feeding process occupies about 26 percent of the period of the electric control diesel engine station, so the diesel engine plant urgently hopes that the oil feeding and cleaning process of the HCU can be carried out before the diesel engine is folded, and therefore, the part plant is required to carry out oil feeding and cleaning on the HCU assembly only, and the time for occupying the test run platform for cleaning the HCU assembly is reduced.

At present, Korean suppliers already meet the requirement that the cylinder hydraulic unit ensures the cleanness of an inner cavity during delivery, namely oil feeding and cleaning of the cylinder hydraulic unit are completed before the diesel engine is folded, but the technology is not owned domestically, and domestic suppliers can provide the cylinder hydraulic unit with the clean inner cavity.

Disclosure of Invention

The invention aims to provide an oil feeding tool for a hydraulic cylinder unit and a cleaning process thereof, and the oil feeding tool realizes the cleaning of the hydraulic cylinder unit before the large folding of a diesel engine through the design of each oil way in a distribution block.

In order to achieve the purpose, the invention is realized by the following technical scheme:

the utility model provides a frock is puted oil to cylinder hydraulic unit, this frock contains:

the hydraulic main pipe is connected with at least one distribution block, the bottom of each distribution block is communicated with an oil collecting tank of the HCU seat plate, and the oil collecting tank of the HCU seat plate is sequentially communicated with the oil return block assembly, the one-stage or multi-stage oil return filtering system and the hydraulic main pipe;

the distribution block is internally provided with a distribution block oil inlet, a high-pressure ball valve, a distribution block main oil hole, a multi-way valve and a distribution block bottom which are sequentially communicated through a pipeline.

Preferably, the allocation block further comprises:

and the film pressure accumulator is communicated with a pipeline between the distribution block main oil hole and the multi-way valve.

Preferably, the allocation block further comprises:

the oil ejector comprises at least one path of high-pressure oil discharge pipeline, and two ends of the high-pressure oil discharge pipeline are respectively communicated with the high-pressure ball valve and the bottom of the distribution block.

Preferably, the allocation block further comprises:

and the oil feeder control oil pipeline is communicated between the oil inlet of the distribution block and the pipeline of the high-pressure ball valve.

Preferably, the allocation block further comprises:

a fuel booster pump and/or an exhaust actuator respectively included in the first oil passage and/or the second oil passage;

the first oil way is a multi-way valve, the bottom of the fuel booster pump, a fuel booster pump blank plate, a distribution block sealing groove, a fuel oil booster pump oil drainage hole and the bottom of the distribution block which are communicated in sequence;

the second oil way is a multi-way valve, the bottom of the exhaust actuator, a blank plate of the exhaust actuator, a sealing groove of the distribution block, an oil drainage hole of the exhaust actuator and the bottom of the distribution block which are communicated in sequence.

Preferably, an oil return pipe is arranged on the back surface of the distribution block and is contained in a third oil path, and the third oil path is a multi-way valve discharge hole, an oil return pipe and the bottom of the distribution block which are communicated in sequence.

Preferably, at least one adjustable overflow valve is connected between the hydraulic main pipe and the distribution block.

Preferably, this frock still contains: at least one segmented test stand, the distribution block being connected to the segmented test stand by a distribution block base.

Preferably, the sectional type test bed comprises a test bed plate and a plurality of supporting groups for supporting the test bed plate,

the periphery of the test bed flat plate is provided with a fence, the fence is provided with a plurality of oil drainage threaded holes, and a plurality of screw plugs are screwed into the corresponding oil drainage threaded holes.

Preferably, the oil feeding and cleaning process for the oil feeding tool of the cylinder hydraulic unit comprises the following steps:

s1, carrying out a distribution block pump pressure test;

s2, manually and roughly washing pipelines of the distribution blocks at high pressure;

s3, mounting each component in the cylinder hydraulic unit on a sectional test bed, throwing oil to wash the pipeline in the distribution block, throwing oil from the hydraulic main pipe, passing through each pipeline in the distribution block, and then returning to the hydraulic main pipe from the oil collecting tank of the HCU seat plate through each level of return oil filtering system;

s4, oil sample detection is carried out at the last stage of return oil filtering system;

s5, when the oil sample detection of the step S4 meets the preset specification, dismantling each part on the distribution block;

and S6, removing the distribution block and the distribution block base from the sectional type test bed.

Compared with the prior art, the invention has the following advantages:

according to the oil feeding tool for the cylinder hydraulic unit, the cylinder hydraulic unit is cleaned before the diesel engine is folded greatly by designing the oil way of the inner cavity of the distribution block, so that the time consumed in the oil feeding and cleaning process is saved, and the pressure of resource shortage of a test run platform of a diesel engine plant is relieved; meanwhile, the tool and the cleaning process thereof ensure the oil feeding and cleaning effect, effectively save the time cost and the capital consumption and improve the efficiency of industrial production.

Drawings

FIG. 1 is a schematic diagram of the principle of the oil feeding tool for the hydraulic unit of the cylinder;

FIG. 2 is a schematic diagram of the external structure of the distribution block of the present invention;

FIG. 3 is a schematic view of the structure of the bulkhead of the present invention;

fig. 4 is a schematic view of oil feeding and cleaning of the oil feeding tool for the hydraulic unit of the cylinder.

Detailed Description

The present invention will now be further described by way of the following detailed description of a preferred embodiment thereof, taken in conjunction with the accompanying drawings.

Each part pipeline structure is complicated in the HCU system, need link up HCU piping and spare part as much as possible when throwing the oil washing and wash, and need consider flow and loss of pressure scheduling problem as far as possible when designing the frock, in addition, in order to ensure the leakproofness that each subassembly is connected, can not take place the lubricating oil condition of leaking.

As shown in fig. 1, which is a schematic diagram of the principle of the oil feeding tool for the cylinder hydraulic unit of the present invention, the tool includes: hydraulic pressure house steward 1, at least one distribution piece 2, return oil piece assembly 3 and one-level or multistage oil return filtration system, hydraulic pressure house steward 1 passes through at least one distribution piece 2 of hose connection, and the distribution piece bottom intercommunication HCU bedplate oil collecting tank (distribution piece groove of bleeding) of each distribution piece 2, HCU bedplate oil collecting tank communicates one-level or multistage oil return filtration system and hydraulic pressure house steward 1 in proper order. In this embodiment, the tool includes a first stage return oil filtration system and a second stage return oil filtration system. Because of the presence of fine iron dust in the oil circuit, two-stage filtration is designed for cost reasons. The first-stage oil return filtering system is a reusable coarse filtering screen, and the second-stage oil return filtering system is a non-reusable high-precision filtering screen, so that the oil return filtering system has the advantages of long service life and high price.

In addition, an adjustable overflow valve 15 is connected between the hydraulic manifold 1 and the distributor block 2. The adjustable overflow valve 15 is an overload protection valve in the tool oil path system, and when the supplied hydraulic oil exceeds the set pressure, the adjustable overflow valve 15 is opened to drain the over-pressure hydraulic oil back to the hydraulic main pipe 1 (oil tank), so that the hydraulic system of the subsequent oil path is protected.

When the oil is thrown and cleaned, the oil path in the HCU pipe system starts from the hydraulic main pipe 1 to the distribution block 2 and returns to the oil collecting tank of the HCU base plate. In the present embodiment, the hydraulic main 1 is a high-pressure piping system, and the working pressure is about 300 bar; the inner cavity of the distribution block 2 is mainly divided into a high-pressure pipeline, a low-pressure discharge pipeline and a process hole pipeline; the oil collecting groove of the HCU seat plate is low-pressure oil. The hydraulic manifold 1 distributes high-pressure hydraulic oil to the cylinder distribution blocks 2 through a manifold, and the distribution blocks 2 are internally provided with carriers of various valve elements and are connected with various oil passages in series. Because various control valves have extremely high requirements on cleanliness, the internal oil passages of the distribution block 2, particularly high-pressure and oil inlet pipelines, need to be carefully analyzed, and the pipelines need to be cleaned in place when oil feeding oil passages are designed.

Inside multiple spare part and the multiple oil circuit of containing of distribution piece 2, in this embodiment, contain distribution piece oil feed department, high-pressure ball valve 5, distribution piece owner oilhole, multi-way valve 4, the distribution piece bottom that communicate in proper order through the pipeline in the distribution piece 2. The main oil hole of the distribution block mainly serves a multi-way valve 4, and continuously supplies oil for the multi-way valve 4. The multi-way valve 4 includes many places multi-way valve bleeder hole, and each spare part intercommunication in multi-way valve 4 and the distribution piece 2, spare part includes: an exhaust actuator 9 and a fuel booster pump 8.

In addition, the back of the distribution block 2 is also provided with an oil return pipe 21 which is contained in a third oil path, and the third oil path is a multi-way valve leakage hole, the oil return pipe 21 and the bottom of the distribution block which are communicated in sequence.

Hydraulic oil is injected from the hydraulic main pipe 1, reaches the oil inlet of the distribution block through a hose, then reaches the main oil hole of the distribution block and the multi-way valve 4 through the high-pressure ball valve 5, and then is injected to penetrate through all parts. Under the usual condition, for the normal close during 5 operating modes of high-pressure ball valve, in order to get rid of impurity high-efficiently, set up high-pressure ball valve 5 to open mode when throwing oil to the washing, close it after throwing oil to wash the completion.

The multi-way valve 4 is the most important control valve on the distribution block 2, and the main function of the multi-way valve is to continuously and orderly control the operation of a fuel booster pump 8 and an exhaust actuator 9 in the distribution block 2.

The main thought of the design of the oil injection tool at the position of 4 multi-way valves is as follows: firstly, the input/output pipeline of the multi-way valve 4 is ensured to be contained, secondly, the discharge oil path of the multi-way valve 4 is designed on the same plane, therefore, the discharge oil path of the multi-way valve 4 can be conveniently communicated in a cleaning and oil feeding system, and the discharge holes of the multi-way valve 4 respectively return to the bottom of the distribution block through the oil return pipe 21 of the distribution block 2 and then are discharged into an oil collecting tank of an HCU seat plate.

In this embodiment, the multi-way valve 4 is a two-position three-way solenoid valve, two independent oil paths are input, and the two-position three-way solenoid valve controls the output of three stations (oil injection, gap non-action, exhaust output control). Because the switching frequency of the three working conditions is very high, high-pressure hydraulic oil needs to be continuously discharged and input in the working condition conversion process, and great influence is generated on an oil way in the inner cavity of the distribution block 2. For the discharge oil path (the oil path communicated with each part), a large number of oil return holes, throttle screw plugs and independent part oil return pipes 21 are designed on the distribution block 2, so as to alleviate the influence of pulse pressure on the whole system and parts and reduce the requirements on the impact and sealing surface of the HCU seat plate. As can be seen from the above analysis of the oil passage of the multi-way valve 4, the control oil passage of the multi-way valve 4 needs to be cleaned and filled with oil. As for the bleeder line, can be according to whether the design is convenient, can the selectivity let some pipelines participate in throwing oil, convenient design promptly accords with fluid characteristic again, takes out the inner chamber of distribution piece 2 with impurity through the lubricating oil easily.

In this embodiment, the design weight of the multi-way valve blank plate of the multi-way valve 4 is about 1.2KG, and the square structure is not easy to carry, so the lifting lug 12 is designed on the multi-way valve blank plate, and the carrying and the dismounting are convenient.

Still contain grease squirt 6 in the distribution piece 2, 6 department's of grease squirt oil throws oily frock design's main thinking and is: high-pressure oil is injected from the high-pressure ball valve 5 (which is ensured to be in an opening state) and reaches the oil ejector blank plate, the oil ejector blank plate communicates the oil inlet pipeline and the oil outlet pipeline of the oil ejector 6, and the high-pressure oil is finally discharged from the bottom of the distribution block. The oil ejector 6 comprises two high-pressure oil discharge pipelines, and two ends of each high-pressure oil discharge pipeline are respectively communicated with the high-pressure ball valve 5 and the bottom of the distribution block. This design ensures that the end of the piping has a drain hole where scrap iron does not accumulate.

In order to ensure whether the high-pressure ball valve 5 is in an open state, the invention also designs a threaded process pressure measuring port at the oil injector 6, and whether the high-pressure ball valve 5 is in the open state can be clearly obtained through the process pressure measuring port.

In addition, an oil ejector control oil pipeline is added in the embodiment, and whether the oil ejector 6 works depends on whether the diesel engine runs or not, so that the oil ejector control oil pipeline is arranged between the oil inlet position of the distribution block and the pipeline of the high-pressure ball valve 5. After high-pressure oil is injected from the oil inlet of the distribution block, the oil pipeline is controlled by the oil injector 6, the oil pipeline is rotated to a designated position through the high-pressure ball valve 5, and the high-pressure oil is directly discharged to the bottom of the distribution block through two high-pressure oil discharge pipelines of the oil injector 6 so as to reach the oil collecting groove of the HCU seat plate. When a problem of fuel injection or exhaust occurs in a certain cylinder, the high-pressure ball valve 5 is closed, so that the fuel injection and the exhaust of the cylinder can not be operated any more, but the cylinder connecting rod still moves up and down, so that the lubrication is still needed.

Functionally, the control oil line of the lubricator 6 must be cleaned in place and the design cleaning oil dosing scheme must cover the lubricator control oil line.

When the multi-way valve 4, the high-pressure ball valve 5 and the oil injector 6 are in working conditions, high-pressure hydraulic oil in the inner cavity of the distribution block 2 is directly used, so that cleaning control needs to be carried out on oil passages of the inner cavities of the components. Wherein, the high-pressure ball valve 5 can be directly arranged in the distribution block 2, so that the high-pressure ball valve participates in the cleaning and oil feeding of the whole system; the internal systems of the multi-way valve 4 and the oil injector 6 are complex, and if the systems are cleaned, the systems need to work normally. Because the cleaning condition of the whole oil circuit is not good before oil injection and fine washing, the multi-way valve 4 and the oil injector 6 are in working conditions and are connected with the distribution block 2 in series for rough washing to cause damage to internal parts, the multi-way valve 4 and the oil injector 6 both adopt standard purchasing parts, a supplier is required to clean the inner cavity systems of the multi-way valve 4 and the oil injector 6 before leaving a factory, and the standard of ISO 4406Code 18/16/13(NAS 16387 level) must be met.

Except the oil circuit of the inner cavity of the distribution block 2, the distribution block 2 also comprises independent systems such as a film pressure accumulator 7, a fuel oil booster pump 8 and an exhaust actuator 9, and the oil circuit of the inner cavity of the distribution block 2 only provides hydraulic power for the oil circuit, so that the fine cleaning of the components is not considered in the cleaning oil feeding range, and only the oil circuit where the components are located needs to be cleaned.

For a high-pressure input oil path, a film pressure accumulator 7 is designed in the distribution block 2, the film pressure accumulator 7 mainly serves as a main oil hole of the distribution block, and the main function of the film pressure accumulator is to reduce the fluctuation of hydraulic oil at the main oil hole of the distribution block in a pipeline, enhance the capacity of the main oil hole of the distribution block for continuously supplying oil to the multi-way valve 4 and alleviate the pulse pressure of the high-pressure input oil path.

The thin film pressure accumulator 7 is communicated with a pipeline between the distribution block main oil hole and the multi-way valve 4. Wherein the membrane in the membrane pressure accumulator 7 is an energy storage component. When the multi-way valve 4 does not work, the pressure in the oil cavity suddenly increases, the film is expanded, and the volume of the oil cavity is increased; after the multi-way valve 4 acts, a part of high-pressure oil in the oil cavity is consumed, the film shrinks, and the volume of the oil cavity is reduced.

The main idea of the oil feeding tool at the position of the film pressure accumulator 7 is to be stuffy (no bleed pipeline is arranged beside the oil feeding tool), so that the oil path of the film pressure accumulator 7 is only one section, and a cleaning oil feeding scheme is designed to cover the section.

In addition, a threaded plug-closing process hole is designed on the film pressure accumulator 7 so as to be convenient for subsequent oil pressure detection.

The fuel booster pump 8 in the inner cavity of the distribution block 2 is contained in a first oil way, and the first oil way is a multi-way valve 4, the bottom of the fuel booster pump, a fuel booster pump blank plate, a distribution block sealing groove, a fuel booster pump oil drainage hole and the bottom of the distribution block which are communicated in sequence.

The main thought of the design of the oil feeding tool at the position 8 of the fuel oil booster pump is as follows: the hydraulic oil is separated from the multi-way valve 4, flows to the bottom of the fuel booster pump through an oil pipeline, is led out through a blank plate of the fuel booster pump, flows to the sealing groove of the distribution block, passes through the oil drainage hole of the fuel booster pump, and is finally discharged from the bottom of the distribution block. The design through first oil circuit leads hydraulic oil to the fuel booster pump draining hole, has improved clean efficiency, has also eliminated the problem of impurity at the end gathering.

In this embodiment, 8 stifle boards of fuel booster pump design weight is about 2.8KG, and square structure is difficult for the transport, so designed lug 12 on the stifle board of fuel booster pump, convenient transport and dismouting.

The exhaust actuator 9 in the inner cavity of the distribution block 2 is contained in a second oil path, and the second oil path comprises a multi-way valve 4, the bottom of the exhaust actuator, an exhaust actuator blank plate, a distribution block sealing groove, an exhaust actuator oil drainage hole and the bottom of the distribution block which are communicated in sequence.

The main idea of the design of the oil feeding tool at the 9 position of the exhaust actuator is as follows: and hydraulic oil is discharged from the multi-way valve 4, is conveyed to the bottom of the exhaust actuator through an oil pipeline, is led out through a blank plate of the exhaust actuator, returns to the sealing groove of the distribution block, passes through an oil drainage hole of the exhaust actuator, and is finally discharged from the bottom of the distribution block. The lubricating oil is led to the discharge hole through the tool, so that the cleaning efficiency is improved, and the problem of impurity gathering at the tail end is also solved.

In this embodiment, the design weight of the blank plate of the exhaust actuator is about 2.1KG, and the square structure is not easy to be carried, so that the lifting lug 12 is designed on the blank plate of the exhaust actuator, and the blank plate is convenient to carry, disassemble and assemble.

In the invention, the tools of the parts such as the multi-way valve 4, the oil injector 6, the membrane pressure accumulator 7, the fuel oil booster pump 8, the exhaust actuator 9 and the like are all composed of outer hexagon screws 14, respective blank plates 13 (forming an oil groove), lifting lugs 12, gaskets 11 and screw plugs, and by means of the tools, the parts are stably matched with the distribution block 2, wherein the blank plates 13 are arranged outside the shell of the distribution block 2.

The degree of freedom between parts is usually eliminated by a method of 'one side and two pins', but the pin hole position of the parts can improve the processing requirement of the whole part by adopting the method, and the difficulty in assembling and disassembling the parts is increased between the positioning pins and the positioning pin holes of the parts, so that the invention only considers that 'one side' and 'two pins' are not designed. From the aspect of requirements, the matching requirement of high precision between the parts for cleaning and oil feeding and the distribution block 2 is not needed, and on the other hand, the fastened positioning pin and the positioning pin hole can be positioned in a large gap mode, so that the parts are easy to disassemble and assemble in the actual operation process by only considering the mode of one surface, and the production is convenient.

In addition, this cylinder hydraulic unit frock of jettisoning still designs has a plurality of distribution piece base 10 and a plurality of sectional type test bench 16, because cylinder hydraulic unit washs for a plurality of jars together usually during the process, the total length of a plurality of jars may reach tens of meters, be not convenient for use the integral type test bench, so adopt sectional type test bench 16, in order to guarantee the flexibility of cleaning, sectional type test bench 16 compares in the integral type test bench, the process such as its test bench equipment, cylinder hydraulic unit wash all is more convenient.

The sectional test bench 16 is a carrier for the distribution block 2, said distribution block 2 being firmly connected to the sectional test bench 16 by means of the distribution block base 10 to ensure reliable sealing surfaces. Through the analysis of the oil circuit in the inner cavity of the distribution block 2, the bottom of the distribution block is gathered with the oil return of the fuel oil booster pump 8, the oil return of the exhaust actuator 9 and the oil discharge of the multi-way valve 4.

Considering the size inconsistency of the distribution blocks 2 of different models, different distribution block bases 10 are designed for the distribution blocks 2 of each model (the distribution block base 10 with better universality can also be adopted), the distribution block bases 10 are firmly connected with a sectional test bed 16, the distribution block bases 10 are in threaded connection with the distribution blocks 2, and the sealing surfaces of the distribution block bases are designed according to the different distribution blocks 2. The shape of the distribution block base 10 is designed mainly according to the plane of the bottom of the distribution block, and a boss structure is designed on the distribution block base 10, and during installation, alignment can be carried out on two sides by referring to the boss structure, and then screws are screwed.

In addition, a gasket 11 is used in this embodiment between the base 10 of the dispenser block and the connecting surface of the dispenser block 2 to ensure a reliable seal between the two components. Normally, the gasket 11 is made of fluororubber, but in actual work, the fluororubber is easily deformed by heat to cause sealing failure, so in the embodiment, the gasket 11 is made of the cork gasket 11, so that the sealing effect is optimal, and the cork gasket 11 is more durable.

The segmented test stand 16 comprises a test stand plate and a number of support groups for supporting the test stand plate, which is connected to the distribution block base 10. The oil leakage condition is considered in the cleaning process, so that a fence is arranged on the periphery of the flat plate of the test bed, a plurality of oil drainage threaded holes are formed in the fence, and a plurality of screw plugs are screwed into the corresponding oil drainage threaded holes.

In this embodiment, the rail is for adding the welding round hem on the test bench flat board to set up a plurality of oil extraction screw hole on the hem, when cleaning the work, use the screw plug screw in to screw up in the oil extraction screw hole and prevent that hydraulic oil from dripping.

In the present embodiment, the number of cylinders is eight, and since eight cylinders are as long as eleven meters in length, a plurality of segment type test stands 16 are employed to install eight cylinders regardless of the design of the integrated test stand. The sectional test bed 16 is welded by an integral steel structure, and the welding stress is large, so that annealing stress removal is required after welding is finished.

The sectional type test bed 16 of the invention considers the space size for installing the hydraulic piping system, and ensures that the hydraulic main pipe 1 is easy to disassemble and assemble; the space size of the oil return main pipe is also considered, the oil return ports can be butted, and the structure is easy to process and manufacture.

Referring to fig. 4, a schematic diagram of oil feeding and cleaning of the oil feeding tool of the hydraulic unit of the cylinder according to the present invention is shown, in this embodiment, the sectional test bed 16 is in a straight layout according to the location of oil feeding and cleaning. The oil inlet pipe is connected with a hydraulic main pipe 1 matched with the main machine, an oil inlet of the oil feeding cleaning equipment can be designed in the center of the two test beds, the original hydraulic pipe assembly is disassembled into two sections, and a tee oil inlet block is designed in the middle.

Each cylinder of the cylinder hydraulic unit has two main oil paths which need to be connected into the oil return block assembly 3: one is an oil collecting groove of the HCU seat plate, and the other is the bottom of the distribution block. An oil return block assembly 3 of the oil feeding and cleaning equipment is arranged in the center of the two test beds, a pipeline connected with the oil return block assembly 3 is designed into two sections, and a three-way oil return block is designed in the middle. In addition, oil return piece assembly 3 both sides are provided with oil sample connection, and the oil sample that the oil of throwing is judged to take out the chemical examination from two sample connections of washing every time.

An oil feeding and cleaning process for an oil feeding tool of a hydraulic unit of an air cylinder comprises the following steps:

s1, performing a distribution block 2 pump pressure test; s2, manually and roughly washing the pipelines of the distribution block 2 at high pressure; s3, oil is thrown from the hydraulic main pipe 1 through the pipelines in the distribution block 2, and then flows back to the hydraulic main pipe 1 from the oil collecting tank of the HCU seat plate through each level of return oil filtering system after passing through the pipelines in the distribution block 2; s4, oil sample detection is carried out at the last stage of return oil filtering system; s5, when the oil sample detection of the step S4 meets the industrial specification, dismantling each part on the distribution block 2; s6, removing the distribution block 2 and the distribution block base 10 from the segmented test bed 16, i.e. removing the hydraulic cylinder unit from the segmented test bed 16.

The distribution block 2 pump pressure test of the step S1 is mainly for the purpose of tightness test and obtaining approval of classification societies; the manual high-pressure rough washing of the distribution block 2 in the step S2 needs to be carried out according to the guidance book of cleaning operation/inspection operation of the distribution block, and if necessary, needs to be carried out by means of an endoscope for cleaning and inspection of the inner cavity, wherein the cleaning is mainly to clean the blocky and flocculent scrap irons and impurities, and the blocky and flocculent impurities cannot be washed out of the system by the subsequent oil washing and throwing; before oil injection and fine cleaning in the step S3, the parts are assembled on a test bed according to the HCU assembly instruction book, and then lubricating oil cleaning equipment is started to clean pipelines (cylinder hydraulic unit pipelines) in the distribution block 2. Cleaning and oil feeding equipment parameter setting: high temperature (50-60 deg.C), low pressure (6-10bar), and flow rate (300L/min). The heated lubricating oil passes through the oil cavity in the distribution block 2, oil stain and powdered iron are washed out of the oil circuit of the system, impurities are filtered out through a filtering system (coarse filtering: 200 meshes/hour; fine filtering: 3um), and the inner cavity of the distribution block 2 is continuously and circularly washed until an oil sample taken out from a sampling port reaches the standard in the test.

The process of assembling the hydraulic cylinder unit is as follows: hoisting the hydraulic cylinder unit to the HCU seat plate → dismounting the hydraulic main pipe 1 from the sectional test stand 16 to the HCU seat plate → assembling of parts → protection of the exposed hole outside the diesel engine → rust prevention of the machined surface of the distribution block 2.

In actual work, according to an HCU assembly process, compared with a cleaning oil feeding process of a comprehensive workshop, by adopting the cylinder hydraulic unit oil feeding tool and the cleaning process thereof, the labor time cost of each cylinder hydraulic unit can be saved by about 4 hours (assembly and disassembly of the oil feeding tool on the distribution block 2, and the like).

From the aspect of oil feeding efficiency, the average flow (calculated according to 60 machines and six cylinders) of lubricating oil (hydraulic oil) cleaning equipment is about 300L/min (45KW), the oil feeding time is about 4 hours, and the oil feeding efficiency is doubled compared with that of a comprehensive workshop, namely, the oil feeding efficiency is reduced by half compared with that of the comprehensive workshop. Calculated according to the amount of 32 main machines per year, the power can be saved by 25,600 degrees, and the coal can be converted into standard coal by about 3.2 tons.

Through a large number of experimental verifications (more than 50 accumulated experiments), the oil feeding tool for the hydraulic unit of the air cylinder and the cleaning process thereof can meet the actual requirements. It should be noted that the cylinder hydraulic unit oil feeding tool and the cleaning process thereof are not only suitable for 90MEC diesel engines, but also suitable for all MEC types except for 90MEC diesel engines.

To sum up, the oil feeding tool for the cylinder hydraulic unit comprises: the distribution block 2 comprises a distribution block oil inlet, a high-pressure ball valve 5, a distribution block main oil hole and a multi-way valve 4 which are sequentially communicated through pipelines, and the distribution block 2 is cleaned through the design of each oil way in the distribution block 2, namely the cylinder hydraulic unit is cleaned before the diesel engine is folded greatly.

While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be determined from the following claims.

Claims (10)

1. The utility model provides a frock of puting oil of cylinder hydraulic unit which characterized in that, this frock contains:

the hydraulic main pipe is connected with at least one distribution block, the bottom of each distribution block is communicated with an oil collecting tank of the HCU seat plate, and the oil collecting tank of the HCU seat plate is sequentially communicated with the oil return block assembly, the one-stage or multi-stage oil return filtering system and the hydraulic main pipe;

the distribution block is internally provided with a distribution block oil inlet, a high-pressure ball valve, a distribution block main oil hole, a multi-way valve and a distribution block bottom which are sequentially communicated through a pipeline.

2. The cylinder hydraulic unit oil dosing tool of claim 1, further comprising in the distribution block:

and the film pressure accumulator is communicated with a pipeline between the distribution block main oil hole and the multi-way valve.

3. The cylinder hydraulic unit oil dosing tool of claim 1, further comprising in the distribution block:

the oil ejector comprises at least one path of high-pressure oil discharge pipeline, and two ends of the high-pressure oil discharge pipeline are respectively communicated with the high-pressure ball valve and the bottom of the distribution block.

4. The cylinder hydraulic unit oil dosing tool of claim 3, further comprising in the distribution block:

and the oil feeder control oil pipeline is communicated between the oil inlet of the distribution block and the pipeline of the high-pressure ball valve.

5. The cylinder hydraulic unit oil dosing tool of claim 1, further comprising in the distribution block:

a fuel booster pump and/or an exhaust actuator respectively included in the first oil passage and/or the second oil passage;

the first oil way is a multi-way valve, the bottom of the fuel booster pump, a fuel booster pump blank plate, a distribution block sealing groove, a fuel oil booster pump oil drainage hole and the bottom of the distribution block which are communicated in sequence;

the second oil way is a multi-way valve, the bottom of the exhaust actuator, a blank plate of the exhaust actuator, a sealing groove of the distribution block, an oil drainage hole of the exhaust actuator and the bottom of the distribution block which are communicated in sequence.

6. The oil feed tool of the cylinder hydraulic unit according to claim 1,

and an oil return pipe is arranged on the back surface of the distribution block and is contained in a third oil way, and the third oil way is a multi-way valve discharge hole, an oil return pipe and the bottom of the distribution block which are communicated in sequence.

7. The oil feed tool of the cylinder hydraulic unit according to claim 1,

and at least one adjustable overflow valve is connected between the hydraulic main pipe and the distribution block.

8. The oil feed tool of the cylinder hydraulic unit according to claim 1,

this frock still contains: at least one segmented test stand, the distribution block being connected to the segmented test stand by a distribution block base.

9. The cylinder hydraulic unit oiling tool of claim 8 wherein the segmented test bed comprises a test bed plate and a plurality of support groups for supporting the test bed plate,

the periphery of the test bed flat plate is provided with a fence, the fence is provided with a plurality of oil drainage threaded holes, and a plurality of screw plugs are screwed into the corresponding oil drainage threaded holes.

10. An oil feeding and cleaning process for an oil feeding tool of a cylinder hydraulic unit according to any one of claims 1 to 9, characterized by comprising the following steps:

s1, carrying out a distribution block pump pressure test;

s2, manually and roughly washing pipelines of the distribution blocks at high pressure;

s3, mounting each component in the cylinder hydraulic unit on a sectional test bed, throwing oil to wash the pipeline in the distribution block, throwing oil from the hydraulic main pipe, passing through each pipeline in the distribution block, and then returning to the hydraulic main pipe from the oil collecting tank of the HCU seat plate through each level of return oil filtering system;

s4, oil sample detection is carried out at the last stage of return oil filtering system;

s5, when the oil sample detection of the step S4 meets the preset specification, dismantling each part on the distribution block;

and S6, removing the distribution block and the distribution block base from the sectional type test bed.

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