Gear box bypass filter control system and gear box bypass filter system

Abstract

The present invention provides a bypass filter control system for a gearbox, the control system comprising: a bypass filter motor, a bypass system contactor and a bypass system control circuit. The bypass filter control system of the present invention realizes fine filtration of lubricating oil by controlling the bypass filter, thereby ensuring the cleanliness of the lubricating oil. In addition, the present invention connects the normally open contact of the bypass system contactor after the normally open contact of the high-speed pump contactor, and arranges the coil of the bypass system contactor after the normally open contact of the oil cooling fan contactor, so that the bypass filter motor can only work properly when the high-speed pump and the oil cooling fan are started at the same time, effectively protecting the bypass filter system from the technical defect of being damaged due to long-term excessive pressure. At the same time, the implementation of the bypass filter control system of the present invention does not need to change the circuit connection relationship and control logic of the original gearbox main filter system, which facilitates the implementation of the gearbox bypass filter.

Description

Technical Field

[0001] The invention relates to the technical field of gear oil filtration, and in particular to a gear box bypass filtration control system and a gear box bypass filtration system. Background Art

[0002] The existing filter is a 10μm filter, which cannot effectively remove 5-10μm impurities in the gear oil, resulting in excessive contamination of the gear oil on site, causing increased wear of the gearbox. How to ensure the cleanliness of the lubricating oil and provide a good environment for the gearbox operation has become a technical problem that needs to be solved urgently. Summary of the invention

[0003] The purpose of the present invention is to provide a gearbox bypass filtration control system and a gearbox bypass filtration system to ensure the cleanliness of the lubricating oil and provide a good environment for the operation of the gearbox.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] A gearbox bypass filter control system, the control system comprising: a bypass filter motor, a bypass system contactor and a bypass system control circuit;

[0006] One end of the normally open contact of the bypass system contactor is connected to the line between the normally open contact of the high-speed pump contactor of the gear box main filter system and the power input end of the high-speed pump motor;

[0007] The other end of the normally open contact of the bypass system contactor is connected to the power input end of the bypass filter motor;

[0008] The coil of the bypass system contactor is connected in series with the bypass system control circuit to obtain a series connection circuit; one end of the series connection circuit is connected to a line of any phase between the normally open contact of the oil cooling fan contactor of the gear box main filtering system and the power input end of the oil cooling fan motor, and the other end of the series connection circuit is connected to the neutral line; the connection point of the line of any phase between the normally open contact of the oil cooling fan contactor and the power input end of the oil cooling fan motor and the series connection circuit is set as a control connection point;

[0009] The control end of the bypass system control circuit is connected to the PLC controller of the gear box main filtering system.

[0010] Optionally, the bypass system control circuit includes an intermediate relay;

[0011] The coil of the intermediate relay is connected between the PLC controller and the ground wire;

[0012] The normally open contact of the intermediate relay and the coil of the bypass system contactor are connected in series between the control connection point and the neutral line.

[0013] Optionally, the bypass system control circuit further includes a pressure switch;

[0014] The pressure switch is connected between the control connection point and the normally open contact of the intermediate relay.

[0015] Optionally, the bypass system control circuit further includes a time delay relay;

[0016] The coil of the time delay relay is connected between the pressure switch and the normally open contact of the intermediate relay;

[0017] One end of the delayed disconnection contact of the delay relay is connected to the line between the control connection point and the pressure switch;

[0018] The other end of the delayed disconnection contact of the time delay relay is connected to the line between the normally open contact of the intermediate relay and the coil of the bypass system contactor.

[0019] Optionally, the gearbox main filtration system includes a high-speed pump motor, a high-speed pump contactor, an oil-cooling fan motor, an oil-cooling fan contactor and a PLC controller;

[0020] The normally open contact of the high-speed pump contactor is connected in series between the three-phase power supply and the power input end of the high-speed pump motor; the normally open contact of the oil-cooling fan contactor is arranged to connect the three-phase power supply and the power input end of the oil-cooling fan motor;

[0021] The coil of the high-speed pump contactor and the coil of the oil-cooling fan contactor are respectively connected to the PLC controller.

[0022] A gearbox bypass filtration system, the bypass filtration system comprising a gearbox bypass filtration control system, the bypass filtration system further comprising a bypass filter and a bypass filtration oil pump;

[0023] The input port of the bypass filter is connected to the filtered oil outlet of the gear oil tank through a pipeline, and the output port of the bypass filter is connected to the filtered oil inlet of the gear oil tank through a pipeline;

[0024] The bypass filter oil pump is arranged on a pipeline between the input port of the bypass filter and the filter oil outlet of the gear oil tank;

[0025] The bypass filter motor of the gear box bypass filter control system is connected to the bypass filter oil pump shaft.

[0026] Optionally, the bypass filter is a 5-10 μm filter.

[0027] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0028] The invention provides a bypass filtering control system for a gear box, the control system comprising: a bypass filtering motor, a bypass system contactor and a bypass system control circuit; one end of a normally open contact of the bypass system contactor is connected to a line between a normally open contact of a high-speed pump contactor of a main filtering system of the gear box and a power input end of a high-speed pump motor; the other end of the normally open contact of the bypass system contactor is connected to a power input end of the bypass filtering motor; a coil of the bypass system contactor is connected in series with the bypass system control circuit to obtain a series connection circuit; one end of the series connection circuit is connected to a line of any phase between a normally open contact of an oil cooling fan contactor of a main filtering system of the gear box and a power input end of the oil cooling fan motor, and the other end of the series connection circuit is connected to a neutral line; a control end of the bypass system control circuit is connected to a PLC controller of the main filtering system of the gear box, and fine filtering of lubricating oil is achieved by controlling the bypass filter to ensure the cleanliness of the lubricating oil. Moreover, the present invention connects the normally open contact of the bypass system contactor behind the normally open contact of the high-speed pump contactor, and arranges the coil of the bypass system contactor behind the normally open contact of the oil-cooling fan contactor, so that the bypass filter motor can work properly only when the high-speed pump and the oil-cooling fan are started at the same time, effectively protecting the bypass filter system from the technical defect of being damaged due to long-term excessive pressure. At the same time, the implementation of the bypass filter control system of the present invention does not need to change the circuit connection relationship and control logic of the original gear box main filter system, which facilitates the implementation of the gear box bypass filter.

[0029] The present invention also provides a pressure switch to prevent the gear box bypass filtering system from operating under high pressure.

[0030] The present invention also provides a time delay relay to ensure the normal start-up of the gear box bypass filtering system under low temperature conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0032] Figure 1 A schematic diagram of the circuit connection of the bypass filter motor and the bypass system contactor of the gear box bypass filter control system provided by the present invention;

[0033] Figure 2 A schematic diagram of circuit connections of a bypass system control circuit of a gearbox bypass filtering control system provided by the present invention. DETAILED DESCRIPTION

[0034] The purpose of the present invention is to provide a gearbox bypass filtration control system and a gearbox bypass filtration system to ensure the cleanliness of the lubricating oil and provide a good environment for the operation of the gearbox.

[0035] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] According to the filter manufacturer's manual, the normal operating temperature of the bypass filtration system is 45-85°C. In view that the starting temperature of the high-speed pump of the gear box main filtration system is 45°C, the starting temperature of the cooling fan is 50°C, and the gear oil of the gear box main filtration system is shut down at more than 80 degrees, the gear box bypass filtration system of the present invention links the three together, connects the main power supply of the gear box bypass filtration system in parallel to the high-speed pump contactor K152.2 of the main filtration system, and takes one phase of the control power supply of the gear box bypass filtration system from the oil cooling fan contactor K154.2.1. Therefore, the bypass system can only work normally when the high-speed pump and the oil cooling fan are started at the same time, which can effectively protect the bypass filtration system from damage caused by long-term excessive pressure.

[0037] Specifically, Figure 1 and 2 As shown, the present invention provides a gearbox bypass filtering control system, the control system comprising: a bypass filtering motor M1, a bypass system contactor K2 and a bypass system control circuit L; one end of the normally open contact of the bypass system contactor K2 is connected to the line between the normally open contact of the high-speed pump contactor K152.2 of the gearbox main filtering system and the power input end of the high-speed pump motor M2; the other end of the normally open contact of the bypass system contactor K2 is connected to the power input end of the bypass filtering motor M1; The coil is connected in series with the bypass system control circuit L to obtain a series connection circuit; one end of the series connection circuit is connected to the line of any phase between the normally open contact of the oil cooling fan contactor K154.2.1 of the gear box main filter system and the power input end of the oil cooling fan motor M3, and the other end of the series connection circuit is connected to the neutral line N; the connection point of any phase between the normally open contact of the oil cooling fan contactor K154.2.1 and the power input end of the oil cooling fan motor M3 and the series connection circuit is set as a control connection point, such as Figure 2 Point O in the bypass system control circuit L is connected to the PLC controller of the gear box main filtering system.

[0038] Wherein, the bypass system control circuit L includes an intermediate relay K1, a pressure switch P and a time delay relay KT.

[0039] The coil of the intermediate relay is connected between the PLC controller (the 24V output terminal of the PLC) and the ground wire GND.

[0040] The pressure switch P, the coil of the time delay relay KT, and the normally open contact of the bypass system contactor K2 are connected in series in sequence to form a series connection circuit; one end of the series connection circuit is connected to the control connection point O, and the other end of the series connection circuit is connected to the neutral line, wherein the normally open contact of the bypass system contactor K2 is close to the neutral line, and the pressure switch P is close to the control connection point O.

[0041] One end of the delayed disconnection contact of the delay relay KT is connected to the line between the control connection point O and the pressure switch P; the other end of the delayed disconnection contact of the delay relay KT is connected to the line between the normally open contact of the intermediate relay K1 and the coil of the bypass system contactor K2.

[0042] The gearbox main filter system mentioned in the present invention includes a high-speed pump motor M2, a high-speed pump contactor K152.2, an oil-cooling fan motor M3, an oil-cooling fan contactor K154.2.1 and a PLC controller; the normally open contact of the high-speed pump contactor K152.2 is connected in series between the three-phase power supply and the power input end of the high-speed pump motor M2; the normally open contact of the oil-cooling fan contactor K154.2.1 is arranged to be connected between the three-phase power supply and the power input end of the oil-cooling fan motor M3; the coil of the high-speed pump contactor K152.2 and the coil of the oil-cooling fan contactor K154.2.1 are respectively connected to the PLC controller.

[0043] The present invention also provides a gear box bypass filtering system, which includes a gear box bypass filtering control system, and the bypass filtering system also includes a bypass filter and a bypass filtering oil pump; the input port of the bypass filter is connected to the filtered oil outlet of the gear oil tank through a pipeline, and the output port of the bypass filter is connected to the filtered oil inlet of the gear oil tank through a pipeline; the bypass filtering oil pump is arranged on the pipeline between the input port of the bypass filter and the filtered oil outlet of the gear oil tank; the bypass filtering motor of the gear box bypass filtering control system is connected to the bypass filtering oil pump shaft.

[0044] The bypass filter is a 5-10 μm filter, which is used to filter impurities of 5-10 μm.

[0045] Under the premise of not changing any control program, the present invention enables the bypass filtering system to operate synchronously with the main filtering system and protect the bypass filtering system by adding electrical components such as contactors (bypass system contactors), relays (intermediate relays), and time delay relays, so that the equipment automatically stops running when the system pressure is too high, thereby achieving the purpose of long-term stable operation of the bypass filtering equipment, effectively improving the cleanliness of the gear box lubricating oil, avoiding accelerated wear of gear parts, and increasing the service life of the gear box.

[0046] When the bypass filter system is blocked due to low temperature (high viscosity of gear oil) or contamination of the filter element, the pressure switch P is activated, the K2 contactor control power supply is disconnected, and the system stops working. However, considering that the temperature in the north is too low in winter, the oil temperature may drop to below 45℃ or even lower after the bypass system is shut down and then run again. The system pressure is higher than 3bar, causing the K2 contactor to disconnect and the system cannot work. Therefore, a delay relay KT is added to the loop. When the pressure is too high in winter, the delay relay KT continues to supply power to the K2 contactor for 6 minutes after the pressure switch P is disconnected (field commissioning experience). When the temperature in the bypass system rises and the pressure drops below 3bar, the pressure switch P is closed and the system maintains normal operation. When the bypass filter element is contaminated and blocked, the system pressure is always higher than 3bar, and the system automatically stops running after 6 minutes of operation. After the filter element is replaced, the system runs normally. The filter element service life given by the manufacturer is 6-12 months, so the filter element should be checked and replaced regularly.

[0047] In order to illustrate the effect of the present invention, the present invention also provides the following specific embodiments:

[0048] Therefore, the bypass filtration system of the present invention is added to the original gearbox main filtration system of Leting Wind Farm, so that the gearbox pollution degree is reduced from 23 / 22 / 18 (severe pollution state) to 20 / 17 / 14 (excellent state). Under the premise of not changing any control program, the present invention makes the bypass filtration system run synchronously with the main filtration system and protects the bypass filtration system by adding electrical components such as contactors, relays, and time delay relays, so that the equipment automatically stops running when the system pressure is too high, achieving the purpose of long-term stable operation of the bypass filtration equipment, effectively improving the cleanliness of the gearbox lubricating oil, extending the service life of the oil, avoiding accelerated wear of gear parts, and improving the service life of the gearbox.

[0049] Moreover, the present invention increases the service life of the gearbox equipment, reduces maintenance costs, and effectively improves quality and efficiency by adding a bypass filtering system and improving the gearbox operating environment.

[0050] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0051] This article uses specific examples to illustrate the principles and implementation methods of the invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. The described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

Claims

1. A gearbox bypass filter control system, characterized in that: The control system includes: a bypass filter motor, a bypass system contactor and a bypass system control circuit; One end of the normally open contact of the bypass system contactor is connected to the line between the normally open contact of the high-speed pump contactor of the gear box main filter system and the power input end of the high-speed pump motor; The other end of the normally open contact of the bypass system contactor is connected to the power input end of the bypass filter motor; The coil of the bypass system contactor is connected in series with the bypass system control circuit to obtain a series connection circuit; one end of the series connection circuit is connected to a line of any phase between the normally open contact of the oil cooling fan contactor of the gear box main filtering system and the power input end of the oil cooling fan motor, and the other end of the series connection circuit is connected to the neutral line; the connection point of the line of any phase between the normally open contact of the oil cooling fan contactor and the power input end of the oil cooling fan motor and the series connection circuit is set as a control connection point; The control end of the bypass system control circuit is connected to the PLC controller of the gearbox main filtering system; The bypass system control circuit includes an intermediate relay; The coil of the intermediate relay is connected between the PLC controller and the ground wire; The normally open contact of the intermediate relay and the coil of the bypass system contactor are connected in series between the control connection point and the neutral line; The bypass system control circuit also includes a pressure switch; The pressure switch is connected between the control connection point and the normally open contact of the intermediate relay; The bypass system control circuit also includes a time delay relay; The coil of the time delay relay is connected between the pressure switch and the normally open contact of the intermediate relay; One end of the delayed disconnection contact of the delay relay is connected to the line between the control connection point and the pressure switch; The other end of the delayed disconnection contact of the delay relay is connected to the line between the normally open contact of the intermediate relay and the coil of the bypass system contactor; The gearbox main filtration system includes a high-speed pump motor, a high-speed pump contactor, an oil-cooling fan motor, an oil-cooling fan contactor and a PLC controller; The normally open contact of the high-speed pump contactor is connected in series between the three-phase power supply and the power input end of the high-speed pump motor; the normally open contact of the oil-cooling fan contactor is arranged to connect the three-phase power supply and the power input end of the oil-cooling fan motor; The coil of the high-speed pump contactor and the coil of the oil-cooling fan contactor are respectively connected to the PLC controller.

2. A gearbox bypass filtration system, characterized in that: The bypass filtration system includes the gearbox bypass filtration control system according to claim 1, and the bypass filtration system also includes a bypass filter and a bypass filtration oil pump; The input port of the bypass filter is connected to the filtered oil outlet of the gear oil tank through a pipeline, and the output port of the bypass filter is connected to the filtered oil inlet of the gear oil tank through a pipeline; The bypass filter oil pump is arranged on a pipeline between the input port of the bypass filter and the filter oil outlet of the gear oil tank; The bypass filter motor of the gear box bypass filter control system is connected to the bypass filter oil pump shaft.

3. The gearbox bypass filtration system according to claim 2, characterized in that: The bypass filter is a 5-10 μm filter.

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