A centrifugal oil purifier based on bidirectional pump positive pressure oil supply

Abstract

The present invention provides a centrifugal oil purifier based on a bidirectional pump positive pressure oil supply. The centrifugal oil purifier based on a bidirectional pump positive pressure oil supply includes: a discharge subsystem, a pump body, a motor unit, an auxiliary subsystem and a liquid supply subsystem; the pump body also includes a rotary drum, a centripetal pump is provided inside the rotary drum, a central shaft is provided inside the pump body and below the centripetal pump, and a penetration pipe is provided inside the central shaft. The centrifugal oil purifier based on a bidirectional pump positive pressure oil supply provided by the present invention adopts a positive pressure oil supply form of a volumetric metering pump, which makes the oil purifier system structure simpler, has fewer electromechanical components, and is more convenient to operate and maintain. A volumetric metering pump with forward and reverse running functions is selected to realize the recovery of oil leakage at the mechanical seal; the reverse running function is used to realize the oil discharge function of the system. Except for the slightly negative pressure area in front of the centripetal pump, all other areas are normal pressure or positive pressure areas. The equipment is simple to manufacture and low in cost.

Description

Technical Field

[0001] The present invention relates to the field of oil purification equipment, in particular to a centrifugal oil purifier based on positive pressure oil supply of a bidirectional pump. Background Art

[0002] The oils (lubricating oils and hydraulic oils) used in industrial sites have strict requirements for water content and contaminant content. Even with the best maintenance, the oil will inevitably enter the water or contaminants after a period of operation. When either the water content or the contaminant content reaches a certain value (see NB / SH / T0586, NB / SH / T0599, and YB / T4629 for details), the oil must be replaced or treated to ensure that it meets the standards.

[0003] The cost of replacing oil simply because the water content exceeds the standard is too high. The requirements for use can also be met through treatment. There are usually two ways to deal with water in oil. One is vacuum evaporation, namely vacuum oil purifier, and the other is centrifugal separation, namely centrifugal oil purifier. Vacuum oil purifier can only remove water and gas in oil, making the water content in oil extremely low, but it cannot change the pollutant content and has high energy consumption. Centrifugal oil purifier can not only remove water and gas, but also remove pollutants, so it is more widely used.

[0004] The vacuum pump and the centripetal pump 205 jointly suck (extract) oil at negative pressure. Because they have the flow and pressure characteristics of a centrifugal pump, the system flow varies greatly with the viscosity and temperature of the oil. The system working state is unstable, and there are many manual adjustment links. Manual adjustment is required for different oil products and different temperatures. It is composed of multiple subsystems, with many electrical appliances and control elements, resulting in complex system control, many faults, and inconvenient maintenance. In addition, most of the pipelines and oil tanks in the entire system are in a negative pressure state. Not only are there many manufacturing processes and high costs, but leakage faults are also prone to occur during operation.

[0005] Therefore, it is necessary to provide a centrifugal oil purifier based on a bidirectional pump positive pressure oil supply to solve the above technical problems. Summary of the Invention

[0006] The present invention provides a centrifugal oil purifier based on a bidirectional pump positive pressure oil supply, which solves the problem of multiple use failures of conventional centrifugal oil purifiers.

[0007] In order to solve the above technical problems, the present invention provides a centrifugal oil purifier based on bidirectional pump positive pressure oil supply, which includes: a discharge subsystem, a pump body, a motor group, an auxiliary subsystem and a liquid supply subsystem;

[0008] The pump body also includes a rotating drum, a centripetal pump is arranged inside the rotating drum, a central shaft is arranged inside the pump body and below the centripetal pump, a penetration tube is arranged inside the central shaft, a guide column is provided on the outside of the central shaft, a plurality of butterfly separation discs are arranged on the outside of the guide column, a turntable is provided at the bottom end of the rotating drum, a mechanical seal assembly is provided at the bottom of the turntable, a base is provided at the bottom of the mechanical seal assembly, the motor group is connected to the pump body through a transmission device such as a transmission belt, and the interior of the central shaft is hollow.

[0009] Preferably, the discharge subsystem further comprises a liquid collecting tank, a first solenoid valve is provided inside a pipe outside the liquid collecting tank, and a manual valve is provided inside another pipe outside the liquid collecting tank, and the manual valve is used to manually discharge the liquid and pollutants in the liquid collecting tank during maintenance.

[0010] Preferably, a first liquid level controller is provided at the input port of the liquid collecting tank, and a second liquid level controller is provided inside the liquid collecting tank. The first liquid level controller and the second liquid level controller are sensor-type devices.

[0011] Preferably, the auxiliary subsystem further includes a second one-way valve and a second solenoid valve, and one end of the pipeline on which the second one-way valve and the second solenoid valve are installed is connected to the liquid collecting tank, and the other end is connected to the two-way pump pipeline.

[0012] Preferably, the liquid supply subsystem further includes a bidirectional pump, a temperature transmitter and an oil inlet ball valve, one end of the pipeline where the oil inlet ball valve is installed is the dirty liquid oil inlet, and the temperature transmitter and the oil inlet ball valve are located on the right side of the pipeline connecting the second solenoid valve.

[0013] Preferably, an oil inlet is provided on one side of the base, and an oil outlet is provided on the other side of the base, and the oil inlet is connected to a pipeline of a bidirectional pump.

[0014] Preferably, a drain port is provided at the bottom of the base, an organic seal oil drain port is provided at the bottom of the base and on one side of the drain port, an exhaust and fluid replenishment port is provided at the bottom of the base, and the exhaust and fluid replenishment port is provided between the drain port and the organic seal oil drain port.

[0015] Preferably, a second force and pressure transmitter is installed inside the oil outlet through a pipeline, and a first one-way valve is installed inside the pipeline inside the oil outlet and on one side of the second force and pressure transmitter.

[0016] Preferably, a first pressure transmitter is provided inside the bidirectional pump connecting pipe.

[0017] Preferably, a speed sensor is provided on the outside of the pump body, and various faults such as overspeed, belt slippage, and belt breakage are judged by the setting of the speed sensor, and an alarm signal is issued when the set value is exceeded.

[0018] Compared with related technologies, the centrifugal oil purifier based on bidirectional pump positive pressure oil supply provided by the present invention has the following beneficial effects:

[0019] The present invention provides a centrifugal oil purifier based on a two-way pump positive pressure oil supply, which adopts a volumetric metering pump positive pressure oil supply form, so that the oil purifier system structure becomes simpler, the electromechanical components are reduced, and the operation and maintenance are more convenient. Because a metering pump positive pressure oil supply is adopted, the centripetal pump does not need a large structural size, and only needs to form a micro-negative pressure. Even if the system temperature changes greatly, resulting in a large pressure change in the micro-negative pressure area, the system flow is stable, because the metering pump plays the role of oil supply and flow stabilization. A volumetric metering pump with forward and reverse operation functions is selected. The forward operation function is combined with the auxiliary subsystem to realize the recovery of oil leakage at the mechanical seal; the reverse operation function is used to realize the oil discharge function of the system. Except for the micro-negative pressure area in front of the centripetal pump, all other areas are normal pressure or positive pressure areas. The equipment is simple to manufacture and the cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic structural diagram of a first embodiment of a centrifugal oil purifier based on a bidirectional pump positive pressure oil supply provided by the present invention;

[0021] Figure 2 Schematic diagram of each system structure provided by the present invention;

[0022] Figure 3 A schematic structural diagram of the pump body provided by the present invention;

[0023] Figure 4 A schematic structural diagram of the liquid collecting tank provided by the present invention;

[0024] Figure 5 This is a structural schematic diagram of the second embodiment of the centrifugal oil purifier based on bidirectional pump positive pressure oil supply provided by the present invention.

[0025] Numbers in the figure:

[0026] 1. Discharge subsystem, 2. Pump body, 3. Auxiliary subsystem, 4. Liquid supply subsystem, 201. Rotating drum, 202. Butterfly separation disc, 203. Guide column, 204. Rotating plate, 205. Centripetal pump, 206. Center shaft, 207. Deep pipe, 208. Base, 209. Mechanical seal assembly, 210. Motor group, 211. Oil inlet, 212. Drain port, 213. Exhaust and liquid replenishment port, 214. Mechanical seal oil drain port, 215. Oil outlet, 216. Speed ​​sensor, 301. Oil inlet ball valve, 302. Two-way pump, 303. First one-way valve, 304. Liquid collecting tank, 305. First solenoid valve; 306. Manual valve; 307. Second one-way valve; 308. Second solenoid valve; 309. Temperature transmitter; 310. First force and pressure transmitter; 311. Second force and pressure transmitter; 312. First liquid level controller; 313. Second liquid level controller. DETAILED DESCRIPTION

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0028] First embodiment

[0029] Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 ,in, Figure 1 A schematic structural diagram of a first embodiment of a centrifugal oil purifier based on a bidirectional pump positive pressure oil supply provided by the present invention; Figure 2 Schematic diagram of each system structure provided by the present invention; Figure 3 A schematic structural diagram of the pump body provided by the present invention; Figure 4 This is a schematic diagram of the structure of the liquid collecting tank provided by the present invention. The centrifugal oil purifier based on bidirectional pump positive pressure oil supply includes: a discharge subsystem 1, a pump body 2, a motor unit 210, an auxiliary subsystem 3 and a liquid supply subsystem 4;

[0030] The pump body 2 also includes a rotary drum 201, a centripetal pump 205 is provided inside the rotary drum 201, a central shaft 206 is provided inside the pump body 2 and below the centripetal pump 205, a penetration tube 207 is provided inside the central shaft 206, a guide column 203 is provided on the outside of the central shaft 206, a plurality of butterfly separation discs 202 are provided on the outside of the guide column 203, a turntable 204 is provided at the bottom of the rotary drum 201, a mechanical seal assembly 209 is provided at the bottom of the turntable 204, a base 208 is provided at the bottom of the mechanical seal assembly 209, the motor group 210 is connected to the pump body 2 through a transmission device such as a transmission belt, the interior of the central shaft 206 is hollow, and the mechanical seal assembly 209 is axially followed by the rotating part to perform end face sealing.

[0031] The discharge subsystem 1 also includes a liquid collecting tank 304, a first solenoid valve 305 is provided inside the pipe outside the liquid collecting tank 304, and a manual valve 306 is provided inside another pipe outside the liquid collecting tank 304. The manual valve 306 is used to manually discharge the liquid and pollutants in the liquid collecting tank 304 during maintenance.

[0032] The input port of the liquid collecting tank 304 is provided with a first liquid level controller 312 , and the interior of the liquid collecting tank 304 is provided with a second liquid level controller 313 . The first liquid level controller 312 and the second liquid level controller 313 are sensor devices for sensing liquid level positions.

[0033] The auxiliary subsystem 3 further includes a second one-way valve 307 and a second solenoid valve 308 . One end of the pipeline to which the second one-way valve 307 and the second solenoid valve 308 are installed is connected to the liquid collecting tank 304 , and the other end is connected to the pipeline of the bidirectional pump 302 .

[0034] The liquid supply subsystem 4 also includes a two-way pump 302, a temperature transmitter 309 and an oil inlet ball valve 301. One end of the pipeline where the oil inlet ball valve 301 is installed is the dirty liquid oil inlet. The temperature transmitter 309 and the oil inlet ball valve 301 are located on the right side of the pipeline connected to the second solenoid valve 308.

[0035] An oil inlet 211 is provided on one side of the base 208 , and an oil outlet 215 is provided on the other side of the base 208 . The oil inlet 211 is connected to a pipeline of the bidirectional pump 302 .

[0036] A drain port 212 is provided at the bottom of the base 208 , an organic seal oil drain port 214 is provided at the bottom of the base 208 and on one side of the drain port 212 , and an exhaust and fluid replenishment port 213 is provided at the bottom of the base 208 , and the exhaust and fluid replenishment port 213 is provided between the drain port 212 and the organic seal oil drain port 214 .

[0037] A second force and pressure transmitter 311 is installed inside the oil outlet 215 through a pipeline. A first one-way valve 303 is installed inside the pipeline inside the oil outlet 215 and on one side of the second force and pressure transmitter 311 .

[0038] A first pressure transmitter 310 is provided inside the connecting pipe of the bidirectional pump 302 .

[0039] The working principle of the centrifugal oil purifier based on bidirectional pump positive pressure oil supply provided by the present invention is as follows:

[0040] The main function of the liquid supply subsystem is that the two-way pump 302 runs in the forward direction, sucks the dirty liquid in the user's oil tank through the oil inlet ball valve 301 according to the system's nominal flow rate, and sends it into the system in the form of pressurized oil, and then passes through the first one-way valve 303 at the system outlet to the user's oil tank, thereby completing the system's positive pressure supply and oil filling process; after the two-way pump 302 runs, the oil forms a cycle, and when the oil temperature reaches the normal value set by the temperature transmitter 309 and the pressures before and after the centrifugal device reach the normal values ​​set by the first pressure transmitter 310 and the second pressure transmitter 311, the centrifugal device is allowed to start running; the temperature before the centrifugal device starts When any one of the temperature transmitter 309, the first force and pressure transmitter 310 and the second force and pressure transmitter 311 is lower than or exceeds the set lower limit or upper limit, the centrifugal device is not allowed to start and an alarm signal is issued; after the centrifugal device is running, when any one of the temperature transmitter 309, the first force and pressure transmitter 310 and the second force and pressure transmitter 311 is lower than or exceeds the set lower limit or upper limit, an alarm signal is issued and the system operation is stopped; because the first one-way valve 303 has a certain opening pressure, under normal circumstances it can not only ensure that all pipes and cavities inside the oil purifier system are filled with oil and meet the requirements of the friction pair, but also stabilize the system pressure.

[0041] During operation, if the pressure difference between the first pressure transmitter 310 and the second pressure transmitter 311 before and after the centrifuge exceeds the set normal value, an alarm signal is issued and it can be indirectly judged that the channel is blocked by excessive pollutants, which is also a signal for pollutant removal.

[0042] The drainage subsystem, the liquid collection tank 304, is a composite, integral tank. Its inner layer functions as a conventional oil purifier's waste oil tank, but at positive pressure; its outer layer functions as a conventional oil purifier's drain tank (at normal pressure). Its primary function is to automatically open the first solenoid valve 305 to drain the oil when the water level in the inner waste oil tank reaches the upper limit set by the second liquid level controller 313. When the water level in the inner waste oil tank reaches the lower limit set by the liquid level controller 313, the first solenoid valve 305 automatically closes to stop draining the oil. A manual valve 306 is used to manually drain the liquid and contaminants in the liquid collection tank 304 during maintenance.

[0043] The main functions of the auxiliary subsystem are as follows:

[0044] 1. Recovery of mechanical seal leakage oil: During normal operation, when the liquid level in the outer oil drain tank of the collection tank 304 reaches the upper limit set by the first liquid level controller 312, the second solenoid valve 308 is automatically opened, and the oil in the oil drain tank is sucked into the system by the two-way pump 302 through the manual valve 306, the second solenoid valve 308 and the pipeline; when the liquid level in the outer oil drain tank of the collection tank 304 reaches the lower limit set by the first liquid level controller 312, the second solenoid valve 308 is automatically closed to stop the discharge of oil from the oil drain tank; the second one-way valve 307 does not play any functional role during oil discharge, but prevents oil from entering the outer oil drain tank of the collection tank 304 when the two-way pump 302 operates in the reverse direction.

[0045] 2. Draining process: After the draining program is started, the second solenoid valve 308 opens automatically first, and then the two-way pump 302 runs in the reverse direction at a speed of about 20% of the full speed. At this time, the oil in the cavity of the rotary device is discharged in the reverse direction through the oil inlet ball valve 301 to the system inlet, and then returned to the user's oil tank through the pipeline. This process is dually controlled by the pressure value of the first pressure transmitter 310 and the operating time. In this process, the first one-way valve 303 plays the role of locking the oil return from the oil outlet.

[0046] The arrangement of the temperature transmitter 309 , the first force and pressure transmitter 310 and the second force and pressure transmitter 311 can realize the monitoring of multiple parameters during the working process and the interlocking control between multiple parameters.

[0047] After the oil purifier receives the start signal, the oil supply subsystem automatically starts. After approximately 600 seconds of operation, or when the temperature reaches the normal value set by temperature transmitter 309 and the pressure reaches the normal values ​​set by first and second pressure transmitters 310 and 311, the centrifugal device automatically starts. Once the centrifugal device stabilizes, the dirty liquid is separated in the centrifugal separation zone of the chamber, while contaminants and water remain on the inner wall of the rotary drum. Clean liquid enters the inlet of centrifugal pump 205. This process is positive pressure liquid supply by the oil supply subsystem. Because the centrifugal device is stable, centrifugal pump 205 has self-priming capabilities. Clean liquid entering the inlet of centrifugal pump 205 is sucked in by centrifugal pump 205 and delivered to the user's oil tank through internal channels and valves, completing a complete centrifugal separation process for the dirty liquid. This process is repeated continuously to meet user requirements for water content and contaminant content in the oil.

[0048] Compared with related technologies, the centrifugal oil purifier based on bidirectional pump positive pressure oil supply provided by the present invention has the following beneficial effects:

[0049] The positive pressure oil supply of a volumetric metering pump is adopted, which makes the oil purifier system structure simpler, with fewer electromechanical components and more convenient operation and maintenance. Because the positive pressure oil supply of the metering pump is adopted, the centripetal pump 205 does not need a too large structural size, and only needs to form a micro-negative pressure. Even if the system temperature changes greatly, resulting in a large pressure change in the micro-negative pressure area, the system flow is stable because the metering pump plays the role of oil supply and flow stabilization. A volumetric metering pump with forward and reverse operation functions is selected. By combining its forward operation function with the auxiliary subsystem, the oil leakage at the mechanical seal is recovered; the reverse operation function is used to realize the oil discharge function of the system. Except for the micro-negative pressure area in front of the centripetal pump 205, all other areas are normal pressure or positive pressure areas. The equipment is simple to manufacture and the cost is low.

[0050] Second embodiment

[0051] Please refer to Figure 5 Based on the centrifugal oil purifier using a bidirectional pump with positive pressure oil supply provided in the first embodiment of this application, the second embodiment of this application proposes another centrifugal oil purifier using a bidirectional pump with positive pressure oil supply. The second embodiment is merely a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the independent implementation of the first embodiment.

[0052] Specifically, the difference of the centrifugal oil purifier based on bidirectional pump positive pressure oil supply provided in the second embodiment of the present application is that a speed sensor 216 is provided on the outside of the pump body 2. The speed sensor 216 is set to judge various faults such as overspeed, belt slippage, and belt breakage, and an alarm signal is issued when the set value is exceeded.

[0053] Compared with related technologies, the centrifugal oil purifier based on bidirectional pump positive pressure oil supply provided by the present invention has the following beneficial effects:

[0054] By comparing the theoretical calculated speed of the centrifugal device with the actual measured speed of the speed sensor 216, various faults such as overspeed, belt slippage (large speed difference), and belt breakage (excessive speed difference) can be judged, and an alarm signal is issued when the set value is exceeded, thereby improving the safety of the equipment during use.

[0055] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A centrifugal oil purifier based on a bidirectional pump positive pressure oil supply, characterized in that: include: Discharge subsystem (1), pump body (2), motor group (210), auxiliary subsystem (3) and liquid supply subsystem (4); The pump body (2) further comprises a rotary drum (201), a centripetal pump (205) is provided inside the rotary drum (201), a central shaft (206) is provided inside the pump body (2) and below the centripetal pump (205), a penetration tube (207) is provided inside the central shaft (206), a guide column (203) is provided on the outside of the central shaft (206), a plurality of butterfly separation discs (202) are provided on the outside of the guide column (203), a turntable (204) is provided at the bottom end of the rotary drum (201), a mechanical seal assembly (209) is provided at the bottom of the turntable (204), a base (208) is provided at the bottom of the mechanical seal assembly (209), and the discharge subsystem (1) further comprises a liquid collecting tank (304), a first solenoid valve (307) is provided inside the pipeline outside the liquid collecting tank (304), and a first solenoid valve (307) is provided inside the pipeline outside the liquid collecting tank (304). 05), a manual valve (306) is provided inside another pipe outside the liquid collecting box (304), a first liquid level controller (312) is provided at the input port of the outer oil drain tank of the liquid collecting box (304), a second liquid level controller (313) is provided inside the inner dirty oil tank of the liquid collecting box (304), the liquid supply subsystem (4) further comprises a bidirectional pump (302), a temperature transmitter (309) and an oil inlet ball valve (301), one end of the pipe on which the oil inlet ball valve (301) is installed is a dirty liquid inlet, the bidirectional pump is a positive displacement metering pump with forward and reverse operation functions, a drain port (212) is provided at the bottom of the base (208), an organic seal oil drain port (214) is provided at the bottom of the base (208) and on one side of the drain port (212), and an exhaust and liquid replenishing port (213) is provided at the bottom of the base (208).

2. The centrifugal oil purifier based on bidirectional pump positive pressure oil supply according to claim 1 is characterized in that: The auxiliary subsystem (3) further includes a second one-way valve (307) and a second solenoid valve (308).

3. The centrifugal oil purifier based on bidirectional pump positive pressure oil supply according to claim 1, characterized in that: An oil inlet (211) is provided on one side of the base (208), and an oil outlet (215) is provided on the other side of the base (208).

4. The centrifugal oil purifier based on bidirectional pump positive pressure oil supply according to claim 3 is characterized in that: A second force and pressure transmitter (311) is installed inside the oil outlet (215) via a pipeline, and a first one-way valve (303) is installed inside the pipeline inside the oil outlet (215) and on one side of the second force and pressure transmitter (311).

5. The centrifugal oil purifier based on bidirectional pump positive pressure oil supply according to claim 1, characterized in that: A first pressure transmitter (310) is provided inside the connecting pipe of the bidirectional pump (302).

6. The centrifugal oil purifier based on bidirectional pump positive pressure oil supply according to claim 1, characterized in that: A rotation speed sensor (216) is provided outside the pump body (2).

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