A hydraulic power source device for a capsule vulcanizer with low failure rate

Abstract

The application discloses a hydraulic power source device of a capsule vulcanizing machine with low failure rate, relates to the field of hydraulic transmission, and comprises a power source control method, and the steps of the power source control method are as follows: acquiring the oil supply pressure and rotating speed of a main pump; acquiring the movement speed and working pressure of left and right main machine hydraulic cylinders; comparing the demand with the current amount; adjusting the driving rotating speed of the main pump; and connecting a throttling hole in parallel at the outlet of the internal gear pump. The throttling hole with a fixed opening size is connected in parallel at the oil discharge port of the internal gear pump, so that the hydraulic system "does not need" oil, the throttling hole is used to shunt about 2L / min of oil, the internal gear pump can reach thermal balance at low speed, and the internal gear pump is prevented from being burnt due to overheating, so that the service life of the internal gear pump is prolonged. When misoperation or the gradual increase of the use time occurs, the system back oil resistance is abnormally increased, the opening pressure of the one-way valve is reached, the one-way valve is automatically opened, and the water-cooling radiator is prevented from being damaged due to the abnormally increased back oil resistance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydraulic transmission, in particular to a low-failure-rate hydraulic power source device of a capsule vulcanizing machine. BACKGROUND

[0002] At present, hydraulic technology is widely used in various fields of national economy, such as transportation, mechanical manufacturing, etc.; the standardization, serialization and generalization of hydraulic components greatly facilitate people's selection. The capsule vulcanization process is generally divided into mold control, workpiece loading and unloading, mold closing, pressure maintaining, mold opening, etc. Because the capsule vulcanizing machine needs a large output force, its action is generally completed by a hydraulic system.

[0003] The traditional hydraulic system of the capsule vulcanizing machine usually uses a plunger pump as a power source because of high working pressure. With the continuous improvement of the rated pressure of the internal gear pump, in order to reduce noise and save cost, the internal gear pump as a power component is used in more and more vulcanizing machine hydraulic systems. The internal gear pump is a constant displacement pump, and its working speed range is large, which can be from 100 rpm to 3000 rpm. Therefore, in order to improve the transmission efficiency of the hydraulic system, the internal gear pump is usually driven by a large speed regulation to adapt to the flow requirement of the hydraulic system under different working conditions of the capsule vulcanizing machine. The internal gear pump has no oil drain port, so when it works at low speed, it is easy to burn out due to insufficient heat dissipation.

[0004] How to solve the heat balance problem of the internal gear pump at low speed, improve the reliability of the hydraulic system using the internal gear pump as a power source, and reduce the failure rate of the hydraulic system has become a technical problem to be solved. SUMMARY

[0005] The purpose of the present application is to solve the problem that the internal gear pump has no oil drain port, which is easy to burn out due to heat at low speed, and to provide a low-failure-rate hydraulic power source device of a capsule vulcanizing machine.

[0006] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0007] A low-failure-rate hydraulic power source device of a capsule vulcanizing machine includes a power source control method, and the power source control method has the following steps:

[0008] Obtain the oil supply pressure and speed of the main pump;

[0009] Obtain the movement speed and working pressure of the left and right main machine hydraulic cylinders;

[0010] Compare the demand with the current amount;

[0011] Adjust the driving speed of the main pump;

[0012] Parallel throttling holes at the outlet of the internal gear pump.

[0013] Preferably, the acquisition of the oil supply pressure and rotation speed of the main pump specifically includes:

[0014] The first internal gear pump is driven by a first AC servo motor through a first coupling, the first AC servo motor receives control signals from the hydraulic control device and feeds back rotation speed signals to the hydraulic control device, the oil discharge port of the first internal gear pump is connected with a first pressure sensor and a first pilot overflow valve inlet respectively, the first pressure sensor converts pressure signals into electrical signals and provides them to the hydraulic control device, and the first pilot overflow valve receives control signals from the hydraulic control device to set the outlet pressure of the first internal gear pump as needed.

[0015] The second internal gear pump is driven by a second AC servo motor through a second coupling, the second AC servo motor receives control signals from the hydraulic control device and feeds back rotation speed signals to the hydraulic control device, the oil discharge port of the second internal gear pump is connected with a second pressure sensor and a second pilot overflow valve inlet respectively, the second pressure sensor converts pressure signals into electrical signals and provides them to the hydraulic control device, and the second pilot overflow valve receives control signals from the hydraulic control device to set the outlet pressure of the second internal gear pump as needed.

[0016] Preferably, the acquisition of the movement speed and working pressure of the left and right main machine hydraulic cylinders specifically includes:

[0017] The movement speed and working pressure signals inside the left and right main machine hydraulic cylinders are collected by pressure sensors and speed sensors respectively.

[0018] The measured data are transmitted to the hydraulic control device, and the signals are converted into specific numerical values in the hydraulic control device.

[0019] Preferably, the hydraulic control device compares the required flow rate with the current flow rate, specifically including:

[0020] The hydraulic control device receives specific numerical values of the outlet pressure and rotation speed feedback signals of the first and second internal gear pumps, and specific numerical values of the working pressure and movement speed signals of the left and right main machine hydraulic cylinders, and then compares the specific numerical values of the current pressure and rotation speed received with the data values of the required pressure and rotation speed.

[0021] Preferably, the hydraulic control device adjusts the driving rotation speed of the main pump, specifically including:

[0022] The hydraulic control device sends an adjusting instruction to control the rotating speed of the first and second AC servo motors and the set pressure of the first and second pilot relief valves, so that the oil provided by the hydraulic power source can meet the needs of the curing machine host.

[0023] Preferably, the parallel throttle holes at the outlet of the internal gear pump specifically include:

[0024] The first and second throttle holes arranged at the outlet of the first and second internal gear pumps respectively make the first and second internal gear pumps reach thermal balance, thereby effectively preventing the first and second internal gear pumps from being damaged due to overheating, reducing the failure rate of the system and improving the reliability of the system.

[0025] The low-failure-rate hydraulic power source device of the capsule curing machine has an auxiliary filter connected in series between the water-cooled radiator and the oil return filter, and the auxiliary filter includes:

[0026] The shell is fixedly connected with a mounting column at the bottom, and the mounting column is fixedly connected with a filter shell through bolts at the upper portion, and the filter shell is internally provided with an agitating assembly, and the bottom side wall of the shell is annularly provided with a liquid outlet, and the upper side wall of the shell is fixedly connected with a liquid inlet;

[0027] The fastening assembly is fixedly connected with the bottom of the shell at the power end, and the output end of the fastening assembly is fixedly connected with the inner wall of the shell, and the fastening assembly is used for strengthening the sealing effect of the connection between the shell and the filter shell.

[0028] Preferably, the filter shell is fixedly connected with a tripod at the bottom of the inner wall, and a sliding groove is arranged at the upper portion of the inner wall of the filter shell, and the sliding groove is slidably connected with a movable rod, and the agitating assembly includes a rotating shaft, the rotating shaft is rotatably connected with the end of the tripod at the bottom, the side wall of the rotating shaft is fixedly connected with the end of the movable rod, and the side wall of the rotating shaft is fixedly connected with a spiral blade.

[0029] Preferably, the side wall of the rotating shaft is fixedly connected with a cleaning rod at the upper and lower portions, and the cleaning rods are in close contact with the inner wall of the filter shell.

[0030] Preferably, the bottom of the shell is provided with a piston chamber, the inner wall of the piston chamber is sealingly and slidably connected with a piston plate, the piston plate is fixedly connected with the spring between the bottom of the piston chamber, the bottom of the bolt can abut against the upper surface of the piston plate, the fastening assembly includes a fastening chamber, the fastening chamber is fixedly connected with the side wall of the shell at the upper portion, the fastening chamber is fixedly connected with an air bag inside, and the air bag is connected in communication with the piston chamber through an air guide pipe.

[0031] Compared with the prior art, the present application has the following advantages:

[0032] 1. The application makes the hydraulic system "not need" oil by setting a throttle hole with fixed opening size at the oil discharge port of the internal gear pump, and the throttle hole divides about 2L / min of oil, so that the internal gear pump can reach thermal equilibrium at low speed, and the internal gear pump is prevented from being burned due to overheating, thereby prolonging the service life of the internal gear pump, and when the operation is wrong or the use time gradually increases, the system back oil resistance abnormally increases, reaches the one-way valve opening pressure, and the one-way valve is automatically opened, so that the water-cooled radiator is prevented from being damaged due to abnormally increased back oil resistance.

[0033] 2. The application can make the oil quickly pass through the filter shell by the cooperation between the filter shell, the rotating shaft, the spiral blade and the cleaning rod, the flowability of the oil and the adsorption force provided by the power system, and the centrifugal force generated by the spiral blade, thereby improving the filtering efficiency of the device, and the cleaning rod is also driven to rotate, so that the side wall of the filter shell is scraped, and the filter hole is prevented from being blocked by oil impurities, thereby further improving the filtering efficiency of the device.

[0034] 3. The application can effectively prevent the oil from leaking from the connection between the filter shell and the shell, and prevent impurities from mixing into the filtered oil, thereby improving the sealing effect of the device, by setting the piston chamber, the piston plate and the air bag, and using the extrusion force generated when the bolt moves downward. DETAILED DESCRIPTION

[0035] Figure 1 A low-failure-rate hydraulic power source control method flow chart is proposed for the application;

[0036] Figure 2 A low-failure-rate hydraulic power source system frame structure schematic diagram is proposed for the application;

[0037] Figure 3 A low-failure-rate capsule vulcanizing machine hydraulic power source device auxiliary filter main overall structure schematic diagram is proposed for the application;

[0038] Figure 4 A low-failure-rate capsule vulcanizing machine hydraulic power source device auxiliary filter half-section structure schematic diagram is proposed for the application;

[0039] Figure 5 A low-failure-rate capsule vulcanizing machine hydraulic power source device auxiliary filter Figure 4 A B area enlarged structure schematic diagram is proposed for the application;

[0040] Figure 6 A low-failure-rate capsule vulcanizing machine hydraulic power source device auxiliary filter Figure 4Amplification structure of middle A region.

[0041] In the figure: 1, oil tank; 2, first oil suction filter; 3, first AC servo motor; 4, first coupling; 5, first internal gear pump; 6, first throttle hole; 7, first pilot overflow valve; 8, first pressure sensor; 9, second pressure sensor; 10, second AC servo motor; 11, second coupling; 12, second internal gear pump; 13, second throttle hole; 14, second pilot overflow valve; 15, pressurized internal gear pump; 16, check valve; 17, pilot electromagnetic overflow valve; 18, water-cooled radiator; 19, oil return filter; 20, first oil suction filter; 21, second oil suction filter; 22, hydraulic control device; 23, auxiliary filter; 230, shell; 231, piston chamber; 232, piston plate; 233, spring; 24, mounting column; 241, bolt; 25, filter shell; 251, tripod; 252, movable rod; 26, stirring assembly; 261, rotating shaft; 262, spiral blade; 263, cleaning rod; 27, fastening assembly; 271, fastening chamber; 272, air bag. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all.

[0043] Reference Figures 1-2 A low-failure-rate hydraulic power source device for a capsule vulcanizing machine, comprising a power source control method, the power source control method comprising the following steps:

[0044] S1, obtaining the oil supply pressure and rotating speed of the main pump, specifically comprising:

[0045] The first internal gear pump 5 is driven by the first AC servo motor 3 through the first coupling 4, the first AC servo motor 3 receives the control signal of the hydraulic control device 22 and feeds back the rotating speed signal to the hydraulic control device 22, the oil discharge port of the first internal gear pump 5 is connected with the inlet of the first pressure sensor 8 and the first pilot overflow valve 7 respectively, the first pressure sensor 8 converts the pressure signal into an electric signal and provides it to the hydraulic control device 22, and the first pilot overflow valve 7 receives the control signal of the hydraulic control device 22, which is used to set the outlet pressure of the first internal gear pump 5 as needed;

[0046] The second internal gear pump 12 is driven by the second AC servo motor 10 through the second coupling 11, the second AC servo motor 10 receives the control signal of the hydraulic control device 22 and feeds back the rotating speed signal to the hydraulic control device 22, the oil outlet of the second internal gear pump 12 is connected with the second pressure sensor 9 and the inlet of the second pilot overflow valve 14 respectively, the second pressure sensor 9 converts the pressure signal into an electric signal and provides it to the hydraulic control device 22, and the second pilot overflow valve 14 receives the control signal of the hydraulic control device 22 and is used for setting the outlet pressure of the second internal gear pump 12 as required;

[0047] Wherein, the outlet of the first pilot overflow valve 7 is connected with the outlet of the second pilot overflow valve 14, and the combined flow is connected with the inlet of the water-cooled radiator 18, the outlet of the water-cooled radiator 18 is connected with the auxiliary filter 23, the outlet of the auxiliary filter 23 is connected with the inlet of the oil return filter 19, and the outlet of the oil return filter 19 is connected with the oil tank 1, because the system main oil return is cooled and the oil liquid is filtered; the outlet of the first throttle hole 6 is connected with the outlet of the second throttle hole 13, and the combined flow is connected with the ball end of the one-way valve 16, and then connected with the oil tank 1, and the sharp end of the one-way valve 16 is connected with the inlet of the water-cooled radiator 18;

[0048] When the system works normally, the one-way valve 16 is not opened, and the system oil return is cooled and heat balanced through the water-cooled radiator 18; once the system oil return resistance abnormally increases due to misoperation or gradual increase of use time, the one-way valve 16 will be opened, and the one-way valve 16 will be automatically opened to avoid damage of the water-cooled radiator 18 caused by abnormal increase of the system oil return resistance;

[0049] Wherein, when the system is on standby, the first AC servo motor 3 drives the first internal gear pump 5, and the second AC servo motor 10 drives the second internal gear pump 12, and the lowest stable rotating speed is only about 100 rpm, and the pilot electromagnetic overflow valve 17 is arranged at the outlet of the pressurizing internal gear pump 15, so that the pilot electromagnetic overflow valve 17 is in unloading state, the power consumption is very low, and the heating is less.

[0050] S2, acquiring the motion speed and working pressure of the left and right main machine hydraulic cylinders, specifically comprising:

[0051] The motion speed and working pressure signals in the left and right main machine hydraulic cylinders are collected by using pressure sensors and speed sensors respectively;

[0052] The data measured above are transmitted to the hydraulic control device, and the signals above are converted into specific numerical values in the hydraulic control device;

[0053] When the hydraulic control device 22 detects that the left and right main machine hydraulic cylinders of the curing machine do not act for a long time or the working pressure is abnormal, the hydraulic control device 22 alarms and stops the first and second AC servo motors 3 and 10, thereby effectively reducing the artificial failure of the curing machine.

[0054] S3, comparing the required flow with the current flow, specifically including:

[0055] The hydraulic control device 22 receives the specific values of the feedback signals of the outlet pressure and rotating speed of the first and second internal gear pumps 5 and 12, and the specific values of the working pressure and operating speed signals of the left and right main machine hydraulic cylinders of the curing machine, and then compares the specific values of the received current pressure and rotating speed with the required pressure and rotating speed data;

[0056] S4, adjusting the driving rotating speed of the main pump, specifically including:

[0057] The hydraulic control device 22 sends adjustment instructions to control the rotating speed of the first and second AC servo motors 3 and 10, and the set pressure of the first and second pilot relief valves 7 and 14, so that the oil provided by the power source of the hydraulic system can meet the needs of the main machine of the curing machine;

[0058] The second internal gear pump 12 is equipped with a pressurized internal gear pump 15, and the two form a double pump, which is driven by the second AC servo motor 10, and the outlet of the pressurized internal gear pump 15 is connected in parallel with the second pilot relief valve 14. The hydraulic control device 22 can automatically set the oil supply pressure of the pump according to different steps of product production.

[0059] S5, connecting a throttling hole at the outlet of the internal gear pump, specifically including:

[0060] The first and second throttling holes 6 and 13 are arranged at the outlets of the first and second internal gear pumps 5 and 12, so that the first and second internal gear pumps 5 and 12 can reach thermal equilibrium, thereby effectively preventing the first and second internal gear pumps 5 and 12 from being damaged due to overheating, reducing the failure rate of the system and improving the reliability of the system. In addition, even if the hydraulic system does not need oil, the first and second throttling holes 6 and 13 can divert about 2L / min of oil, so that the internal gear pump can reach thermal equilibrium at low speed and avoid being burned out due to overheating.

[0061] Reference Figures 3-6A low failure rate capsule vulcanizing machine hydraulic power source device, an auxiliary filter 23 is connected in series between a water-cooled radiator 18 and an oil return filter 19, the auxiliary filter 23 comprises:

[0062] The shell 230 is fixedly connected with the mounting column 24 at the bottom, and the mounting column 24 is fixedly connected with the filter shell 25 at the upper portion through the bolt 241, the agitating assembly 26 is arranged in the filter shell 25, the liquid outlet is annularly arranged on the side wall of the bottom of the shell 230, and the liquid inlet is fixedly connected with the side wall of the upper portion of the shell 230.

[0063] The fastening assembly 27 is fixedly connected with the bottom of the shell 230 at the power end, and the output end of the fastening assembly 27 is fixedly connected with the inner wall of the shell 230, and the fastening assembly 27 is used for strengthening the sealing effect of the connection between the shell 230 and the filter shell 25.

[0064] It can be seen that by connecting the auxiliary filter 23 in series between the water-cooled radiator 18 and the oil return filter 19, the oil entering the oil return filter 19 is preliminarily filtered through the auxiliary filter 23, which can reduce the impurities in the oil entering the oil return filter 19, thereby improving the oil filtering efficiency and effectively prolonging the service life of the oil return filter 19.

[0065] Referring to Figure 4 The filter shell 25 is fixedly connected with the tripod 251 at the inner wall bottom, and the sliding groove is arranged on the upper portion of the inner wall of the filter shell 25, and the movable rod 252 is slidably connected in the sliding groove, and the agitating assembly 26 comprises the rotating shaft 261, the rotating shaft 261 is rotatably connected with the end portion of the tripod 251 at the bottom, the side wall of the rotating shaft 261 is fixedly connected with the end portion of the movable rod 252, and the spiral blade 262 is fixedly connected with the side wall of the rotating shaft 261.

[0066] Referring to Figure 4 The cleaning rod 263 is fixedly connected with the inner wall of the filter shell 25 on the upper and lower portions of the side wall of the rotating shaft 261.

[0067] Through the above structure, when the oil in the power source enters the inside of the filter shell 25 through the liquid inlet, the spiral blade 262 will be impacted, at this time, by using the fluidity of the oil and the adsorption force provided by the power system, the spiral blade 262 can be rotated, so that the relatively thick oil can be stirred to meet the use requirements, and the centrifugal force generated by the spiral blade 262 can also make the oil quickly pass through the filter shell 25, thereby improving the filtering efficiency of the device, and in the process of rotating the rotating shaft 261, the cleaning rod 263 will also be rotated, thereby scraping the side wall of the filter shell 25, avoiding that the oil impurities block the filter hole, thereby further improving the filtering efficiency of the device.

[0068] Referring toFigure 5 , Figure 6 The outer shell 230 has a piston chamber 231 at the bottom. A piston plate 232 is slidably connected to the inner wall of the piston chamber 231. A spring 233 is fixedly connected between the piston plate 232 and the bottom of the piston chamber 231. The bottom of the bolt 241 can abut against the upper surface of the piston plate 232. The fastening assembly 27 includes a fastening chamber 271. The fastening chamber 271 is fixedly connected to the upper part of the side wall of the outer shell 230. An airbag 272 is fixedly connected inside the fastening chamber 271. The airbag 272 and the piston chamber 231 are connected through an air guide tube.

[0069] With the above-described structure, when the bolt 241 moves downward, it will compress the piston plate 232, thereby increasing the air pressure inside the piston chamber 231. At this time, since the air bladder 272 is connected to the piston chamber 231 through the air guide pipe, the compressed gas will enter the air bladder 272, causing the air bladder 272 to inflate and fit tightly against the side wall of the filter shell 25. This effectively prevents oil leakage from the connection between the filter shell 25 and the outer shell 230, and prevents impurities from mixing into the filtered oil, thereby improving the sealing effect of the device.

[0070] In another preferred embodiment based on the above embodiments, please continue reading. Figure 4 As shown, in this embodiment, a drive motor 254 is provided at the upper end of the rotating shaft 261. The drive motor 254 is fixed to the inner wall of the filter housing 25 via a second tripod 253. That is, the second tripod 253 is fixedly connected to the inner wall of the filter housing 25, and the drive motor 254 is fixed to the second tripod 253, so that the drive end of the drive motor 254 is connected to the rotating shaft 261. The drive motor 254 drives the rotating shaft 261 to rotate, and the rotating shaft 261 drives the spiral blade 262 to rotate. The drive motor 254 is controlled by a hydraulic control device 22.

[0071] Specifically, a speed sensor is provided on the side of the drive motor 254. The speed sensor is used to detect the rotation speed of the shaft 261 in real time. When the oil in the power source enters the filter housing 25 through the inlet, it will impact the spiral blade 262. At this time, the fluidity of the oil will make the spiral blade 262 rotate, and the spiral blade 262 will drive the shaft 261 to rotate.

[0072] Specifically, the drive motor 254 is preferably a speed-adjustable motor.

[0073] Specifically, when the speed sensor detects the speed information of the rotating shaft 261, it sends the acquired speed information to the hydraulic control device 22. The hydraulic control device 22 controls the opening and closing of the drive motor 254 according to the acquired speed information of the rotating shaft 261.

[0074] Specifically, when the real-time rotating speed of the rotating shaft 261 is greater than or equal to the rotating speed threshold value, the driving motor 254 does not need to be started; when the real-time rotating speed of the rotating shaft 261 is less than the rotating speed threshold value, the hydraulic control device 22 controls the driving motor 254 to rotate, and after the driving motor 254 is started, the rotating speed of the helical blade 262 can be effectively increased, and then the rotating speed of the oil liquid in the filter shell 25 is increased, so as to increase the centrifugal force when the oil liquid rotates, and then the filtering efficiency of the filter shell 25 can be improved.

[0075] In another preferred embodiment based on the above embodiment, specifically, a liquid flow sensor is arranged at the oil inlet of the upper portion of the shell 230, the liquid flow sensor is electrically connected with the hydraulic control device 22, and the liquid flow sensor is used to collect the real-time oil liquid flow △L entering the filter shell 25.

[0076] Specifically, the hydraulic control device 22 comprises a control module. The control module is used to acquire the real-time oil liquid flow △L and the real-time rotating speed △S of the rotating shaft 261 in real time, and the control module is used to judge whether the real-time rotating speed △S of the rotating shaft 261 exceeds the rotating speed threshold value S0, and control the driving motor 254 according to the judgment result.

[0077] Specifically, the control module is further used to set a preset rotating speed matrix S and a preset oil liquid flow matrix L. For the preset rotating speed matrix S, S (S1, S2, S3, S4) is set, wherein S1 is a first preset rotating speed, S2 is a second preset rotating speed, S3 is a third preset rotating speed, and S4 is a fourth preset rotating speed, and S0 < S1 < S2 < S3 < S4 < 1.5S0; for the preset oil liquid flow matrix L, L (L1, L2, L3, L4) is set, wherein L1 is a first preset oil liquid flow, L2 is a second preset oil liquid flow, L3 is a third preset oil liquid flow, and L4 is a fourth preset oil liquid flow, and L1 < L2 < L3 < L4.

[0078] Specifically, the control module is further used to perform the following operations after judging whether the real-time rotating speed △S of the rotating shaft 261 exceeds the rotating speed threshold value S0:

[0079] When S0 ≤ △S, the driving motor 254 is not started;

[0080] When S0 > △S, the driving motor 254 is started to drive the rotating shaft 261 to rotate.

[0081] Specifically, the control module is further used to set the rotating speed of the driving motor 254 according to the relationship between the real-time oil liquid flow △L and each preset oil liquid flow when the driving motor 254 is started:

[0082] When △L ≤ L1, the rotating speed of the driving motor 254 is set to the first preset rotating speed S1;

[0083] When L1<△L≤L2, the rotation speed of the driving motor 254 is set as the second preset rotation speed S2;

[0084] When L2<△L≤L3, the rotation speed of the driving motor 254 is set as the third preset rotation speed S3;

[0085] When L3<△L≤L4, the rotation speed of the driving motor 254 is set as the fourth preset rotation speed S4.

[0086] Specifically, when the i preset rotation speed Si is selected as the rotation speed of the driving motor 254, the driving motor 254 is controlled by the hydraulic control device 22 to rotate at the i preset rotation speed Si, i=1, 2, 3, 4.

[0087] It can be understood that in the above embodiment, the driving motor 254 is controlled by judging whether the real-time rotation speed △S of the rotating shaft 261 exceeds the rotation speed threshold S0 in real time, which can effectively adjust the oil rotation speed in the filter shell 25 according to the current rotation speed of the rotating shaft 261. When the real-time rotation speed of the rotating shaft 261 is higher than the threshold, it is determined that the current rotation speed of the rotating shaft 261 meets the requirement of centrifugal force required by oil rotation, so it is not necessary to start the driving motor 254 for assistance. When the real-time rotation speed of the rotating shaft 261 is lower than the threshold, it is determined that the current rotation speed of the rotating shaft 261 cannot meet the requirement of centrifugal force required by oil rotation, which will result in that the oil cannot be effectively centrifugally separated. Therefore, the driving motor 254 can be started for assistance at this time, so as to increase the rotation speed of the rotating shaft 261, so that the oil can meet the rotation speed requirement in centrifugal separation, thereby effectively improving the centrifugal separation efficiency of the oil and the oil filtering efficiency and filtering effect of the filter shell 25.

[0088] Meanwhile, by setting the rotation speed of the driving motor 254 according to the relationship between the real-time oil flow △L and each preset oil flow, the rotation speed of the driving motor 254 can be increased when the amount of oil input into the filter shell 25 is large, thereby ensuring the separation efficiency of the oil in the filter shell 25, so as to dynamically adjust the rotation speed of the driving motor 254 according to the amount of oil input into the filter shell 25, which ensures that the filter shell 25 can effectively filter oil of any input amount.

[0089] Continuing to refer to Figure 4 In the embodiment, the bottom side wall of the shell 230 is annularly provided with a liquid outlet, the liquid outlet is collected through a pipeline to form an oil outlet pipeline, and the oil return filter is connected in series on the oil outlet pipeline. The oil output from the oil outlet pipeline is filtered by the oil return filter, thereby improving the filtering effect and filtering efficiency of the oil, and further prolonging the service life of the oil return filter.

[0090] The above merely describes preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art, according to the technical solution and inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A low failure rate capsule vulcanizing machine hydraulic power source control method, comprising a power source control device, characterized in that: the power source control device is configured to perform the following steps: obtaining the oil supply pressure and rotation speed of a first internal gear pump and a second internal gear pump in the power source device; obtaining the movement speed and working pressure of left and right main machine hydraulic cylinders; comparing the required amount with the current amount; adjusting the driving rotation speed of the first internal gear pump and the second internal gear pump; connecting a throttle hole in parallel at the outlet of the first internal gear pump and the second internal gear pump respectively; the power source control device comprises: an oil tank (1), a first alternating current servo motor (3), a first coupling (4), a first internal gear pump (5), a first throttle hole (6), a first pilot overflow valve (7), a first pressure sensor (8), a second pressure sensor (9), a second alternating current servo motor (10), a second coupling (11), a second internal gear pump (12), a second throttle hole (13), a second pilot overflow valve (14), a pressurized internal gear pump (15), a check valve (16), a pilot electromagnetic overflow valve (17), a water-cooled radiator (18), an oil return filter (19), a first oil suction filter (20), a second oil suction filter (21), a hydraulic control device (22) and an auxiliary filter (23); the outlet of the first pilot overflow valve (7) is connected with the outlet of the second pilot overflow valve (14), and the combined flow is connected with the inlet of the water-cooled radiator (18), the outlet of the water-cooled radiator (18) is connected with the auxiliary filter (23), the outlet of the auxiliary filter (23) is connected with the inlet of the oil return filter (19), and the outlet of the oil return filter (19) is connected with the oil tank (1); the outlet of the first throttle hole (6) is connected with the outlet of the second throttle hole (13), and the combined flow is connected with the ball end of the check valve (16), and then connected with the oil tank (1), and the sharp end of the check valve (16) is connected with the inlet of the water-cooled radiator (18); the obtaining of the oil supply pressure and rotation speed of the first internal gear pump and the second internal gear pump in the power source device specifically comprises: the first internal gear pump (5) is driven by the first alternating current servo motor (3) through the first coupling (4), the first alternating current servo motor (3) receives the control signal of the hydraulic control device (22) and feeds back the rotation speed signal to the hydraulic control device (22), the oil discharge port of the first internal gear pump (5) is connected with the inlet of the first pressure sensor (8) and the first pilot overflow valve (7) respectively, the first pressure sensor (8) converts the pressure signal into an electric signal and provides it to the hydraulic control device (22), and the first pilot overflow valve (7) receives the control signal of the hydraulic control device (22) to set the outlet pressure of the first internal gear pump (5) as required; ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The second internal gear pump (12) is driven by the second AC servo motor (10) through the second coupling (11), the second AC servo motor (10) receives the control signal of the hydraulic control device (22), and the rotational speed signal is fed back to the hydraulic control device (22), the oil discharge port of the second internal gear pump (12) is connected with the second pressure sensor (9) and the inlet of the second pilot overflow valve (14) respectively, the pressure signal is converted into an electrical signal by the second pressure sensor (9) and provided to the hydraulic control device (22), and the second pilot overflow valve (14) receives the control signal of the hydraulic control device (22), which is used to set the outlet pressure of the second internal gear pump (12) as required; The left and right main machine hydraulic cylinder movement speed and working pressure are obtained, specifically including: collecting the movement speed and working pressure signals inside the left and right main machine hydraulic cylinders by using pressure sensors and speed sensors respectively; The above obtained movement speed and working pressure signals are transmitted to the hydraulic control device (22), and the above signals are converted into specific numerical values in the hydraulic control device (22).

2. The low failure rate hydraulic power source control method according to claim 1, characterized by, The required amount is compared with the current amount, specifically including: The hydraulic control device (22) receives the specific numerical values of the outlet pressure and rotational speed feedback signals of the first internal gear pump (5) and the second internal gear pump (12), and the specific numerical values of the working pressure and movement speed signals of the left and right main machine hydraulic cylinders, and then compares the specific numerical values of the current outlet pressure and rotational speed with the required numerical values of the outlet pressure and rotational speed.

3. The low failure rate hydraulic power source control method according to claim 1, characterized by, The driving rotational speed of the first internal gear pump and the second internal gear pump is adjusted, specifically including: The hydraulic control device (22) sends an adjustment instruction to control the rotational speed of the first AC servo motor (3) and the second AC servo motor (10), and control the set pressure of the first pilot overflow valve (7) and the second pilot overflow valve (14), so that the oil provided by the hydraulic power source can meet the needs of the left and right main machine hydraulic cylinders.

4. The low failure rate hydraulic power source control method according to claim 1, characterized by, A throttle hole is connected in parallel at the outlet of the first internal gear pump and the second internal gear pump, specifically including: The first throttle hole (6) and the second throttle hole (13) are arranged at the outlets of the first internal gear pump (5) and the second internal gear pump (12) respectively, so that the first internal gear pump (5) and the second internal gear pump (12) can reach thermal equilibrium, thereby effectively preventing the first internal gear pump (5) and the second internal gear pump (12) from being damaged due to overheating.

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