Bearing lubricating and cooling system

Abstract

The invention belongs to the technical field of bearing lubricating and cooling, and particularly discloses a bearing lubricating and cooling system which comprises a bearing box, the bearing box is provided with an oil inlet and an oil return port, an inner oil pump is further installed in the bearing box, and the inner oil pump can rotate along with a set main shaft to synchronously operate so as to build lubricating oil pressure; the two inner oil pumps are respectively a left-handed pump and a right-handed pump, the left-handed pump rotates along with the set main shaft when the set main shaft rotates in the forward direction, and the right-handed pump rotates along with the set main shaft when the set main shaft rotates in the reverse direction; the main oil tank is used for storing lubricating oil; the cooler is used for cooling the lubricating oil; the filter is used for filtering the cooled lubricating oil; the inner oil pump synchronously rotates along with rotation of the main shaft, lubricating oil pressure is built through kinetic energy of the main shaft, external power dependence is reduced, the kinetic energy of the main shaft is effectively utilized, energy consumption is reduced, and the system structure is simplified.

Description

Technical Field

[0001] This invention belongs to the field of bearing lubrication and cooling technology, and particularly relates to a bearing lubrication and cooling system. Background Technology

[0002] As a key supporting component in rotating machinery, bearings support rotating shafts, and their lubrication and cooling conditions directly affect the stability, safety, and service life of the equipment. In industrial applications, such as large compressors, turbine units, or high-speed motors, bearings operate under high loads and high temperatures for extended periods. If lubrication and cooling are inadequate, excessive wear, sudden temperature increases, and even equipment failure can easily occur, leading to production interruptions and safety hazards.

[0003] However, existing lubrication and cooling systems generally suffer from structural redundancy and low energy efficiency. Specifically, these systems typically employ a separate power source, such as an additional electric oil pump, dedicated to establishing and maintaining lubricating oil pressure. This design not only increases system complexity, leading to cumbersome piping layouts and a greater number of components, but also introduces significant energy waste. The establishment of lubricating oil pressure relies entirely on external power input, failing to effectively utilize the kinetic energy generated by the spindle's own rotation. Even during normal equipment operation, the independent oil pump continuously consumes electrical energy, resulting in unnecessary energy loss. Furthermore, the complex system structure leads to derivative problems such as difficult maintenance and increased failure rates. For example, excessive filter components can easily cause blockages, and insufficient cooling efficiency can lead to lubricating oil temperature imbalance, further exacerbating equipment operational risks. These problems severely restrict the reliability and economy of lubrication and cooling systems.

[0004] To address the aforementioned issues, existing technologies urgently need improvement. Summary of the Invention

[0005] The purpose of this invention is to provide a bearing lubrication and cooling system to solve the problems of redundant structure and low energy efficiency in traditional lubrication and cooling systems.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows: a bearing lubrication and cooling system, including a bearing housing, the bearing housing being provided with an oil inlet and an oil return port, and an internal oil pump being installed inside the bearing housing. The internal oil pump can operate synchronously with the rotation of the set spindle to establish lubricating oil pressure; two internal oil pumps are provided, namely a left-hand pump and a right-hand pump. The left-hand pump operates in sync with the rotation of the set spindle in the forward direction, and the right-hand pump operates in sync with the rotation of the set spindle in the reverse direction.

[0007] The main oil tank is used to store lubricating oil. The main oil tank is equipped with an oil outlet and a return oil filter. The oil outlet is connected to the inlet of the left-hand pump and the inlet of the right-hand pump respectively. The return oil port of the bearing housing is connected to the main oil tank through the return oil filter.

[0008] The cooler is used to cool the lubricating oil. The cooler is equipped with a cooling inlet and a cooling outlet. The outlets of both the left-hand and right-hand pumps are connected to the cooling inlet, and the cooling outlet is connected to the oil inlet of the bearing housing.

[0009] The filter is used to filter the cooled lubricating oil. The filter is equipped with a filter inlet and a filter outlet. The filter inlet is connected to the cooling outlet, and the filter outlet is connected to the oil inlet of the bearing housing.

[0010] Furthermore, it also includes a high-level oil tank, which is equipped with a high-level oil inlet and a return branch. The filter outlet is also connected to the high-level oil inlet, and the return branch is connected to the main oil tank through the return oil filter.

[0011] Furthermore, the main oil tank is also equipped with a starting oil pump, the outlet of which is connected to the cooling inlet of the cooler.

[0012] Furthermore, it also includes a piping system, which includes a main oil supply line, a main oil return line, a branch oil supply line, and an oil supply indicator. One end of the main oil supply line is connected to the filter outlet, and the other end is connected to the oil inlet of the bearing housing through the oil supply indicator. One end of the main oil return line is connected to the oil return port of the bearing housing, and the other end is connected to the oil return filter. One end of the branch oil supply line is connected to the high-level oil inlet of the high-level oil tank, and the other end is connected to the main oil supply line, so that the high-level oil inlet and the cooling outlet form a passage.

[0013] Furthermore, the pipeline system also includes a main oil supply line for the oil pump, a left branch oil supply line, a right branch oil supply line, and a three-way oil supply valve. One end of the main oil supply line for the oil pump is connected to the outlet of the main oil tank, and the other end is connected to the left branch oil supply line and the right branch oil supply line respectively through the three-way oil supply valve. The inlet of the left-hand pump is connected to the three-way oil supply valve through the left branch oil supply line, and the inlet of the right-hand pump is connected to the three-way oil supply valve through the right branch oil supply line.

[0014] Furthermore, the pipeline system also includes the main return oil circuit of the oil pump, the left return oil branch, the right return oil branch, and the return oil three-way valve. The outlet of the left-hand pump is connected to the return oil three-way valve through the left return oil branch, and the outlet of the right-hand pump is connected to the return oil three-way valve through the right return oil branch. One end of the main return oil circuit of the oil pump is connected to the left return oil branch and the right return oil branch respectively through the return oil three-way valve. The other end of the main return oil circuit of the oil pump merges with the outlet of the starting oil pump and is connected to the inlet of the cooler.

[0015] Furthermore, the pipeline assembly also includes a three-valve manifold, which is located in the oil supply branch and before the high-level oil inlet. The three-valve manifold consists of a shut-off valve, a check valve, and a throttle valve arranged in parallel.

[0016] Furthermore, the piping assembly also includes an overflow valve and a return sight glass. The overflow valve is located before the cooling inlet and after the confluence of the main return oil line of the oil pump and the outlet of the start-up oil pump, or the overflow valve is located at the confluence of the main return oil line of the oil pump and the outlet of the start-up oil pump; the return sight glass is installed on the return branch.

[0017] Furthermore, the oil supply indicator includes at least an oil flow sight glass, an oil supply pressure sensor, and an oil supply temperature sensor installed at the oil inlet of the bearing housing.

[0018] Furthermore, the main oil tank is equipped with an oil level sight glass, an oil level indicator, a heater, and an oil tank temperature sensor; the filter is equipped with a differential pressure sensor, with its two ends connected to the filter inlet and filter outlet respectively; the high-level oil tank is also equipped with a one-way vent valve.

[0019] The beneficial effects of this technical solution are as follows:

[0020] This invention provides a bearing lubrication and cooling system. An internal oil pump operates synchronously with the spindle rotation, utilizing the spindle's kinetic energy to establish lubricating oil pressure, reducing reliance on external power. This system effectively utilizes the spindle's kinetic energy, reduces energy consumption, and simplifies the system structure. Compared to existing technologies, this invention features a compact structure, simple control, and excellent cooling effect. It can be widely applied to various bearing lubrication systems. By utilizing the spindle's rotation to drive the oil pump's oil supply, it effectively prevents energy waste caused by a separate power system, reducing energy consumption while simplifying the structure and ensuring effective cooling and lubrication. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the arrangement of a bearing lubrication and cooling system according to the present invention;

[0022] Figure 2 This is a schematic diagram of the bearing lubrication and cooling system of the present invention;

[0023] Figure 3 This is a schematic diagram of the internal structure of the bearing housing of a bearing lubrication and cooling system according to the present invention;

[0024] Figure 4 This is a schematic diagram of the oil supply indicator of a bearing lubrication and cooling system according to the present invention. Detailed Implementation

[0025] The following detailed description illustrates the specific implementation method:

[0026] The reference numerals in the accompanying drawings include: bearing housing 1, left-hand pump 101, right-hand pump 102, oil inlet 103, oil return port 104, bearing 105, oil baffle 106, main oil tank 2, return oil filter 201, oil tank temperature sensor 202, heater 203, oil level indicator 204, oil level sensor 205, cooler 3, coolant inlet temperature sensor 301, coolant inlet pressure sensor 302, coolant outlet pressure sensor 303, oil outlet temperature sensor 304, oil outlet pressure sensor 305, filter 4, differential pressure sensor 401, oil supply indicator 5, oil supply pressure sensor 501, oil supply temperature sensor 502, high-level oil tank 6, high-level oil inlet 601, return flow sight glass 602, one-way vent valve 603, starting oil pump 7, overflow valve 8, one-way valve 9, shut-off valve 10, throttle valve 11, oil supply three-way valve 12, and return oil three-way valve 13.

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Unless otherwise specified, the arrows in the drawings indicate the direction of medium flow.

[0028] The basic implementation examples are as follows: Figure 1-4 As shown: A bearing lubrication and cooling system, comprising:

[0029] The bearing housing 1 is provided with an oil inlet 103 for lubricating oil to enter and an oil return port 104 for lubricating oil to exit. An internal oil pump is also installed inside the bearing housing 1. The internal oil pump can operate synchronously with the rotation of the set spindle to establish the lubricating oil pressure. There are two internal oil pumps, namely a left-hand pump 101 and a right-hand pump 102. The left-hand pump 101 operates synchronously when the set spindle rotates in the forward direction, and the right-hand pump 102 operates synchronously when the set spindle rotates in the reverse direction. Specifically, the bearing housing 1 is used to install the bearing 105 and provide space for the operation of the lubricating oil. The internal oil pump is installed inside the bearing housing 1 and is configured to operate synchronously with the rotation of the set spindle, thereby establishing the required lubricating oil pressure inside the bearing housing 1. The internal oil pump consists of a left-handed pump 101 and a right-handed pump 102. The left-handed pump 101 is designed to operate in accordance with the forward rotation of the set spindle, while the right-handed pump 102 operates in accordance with the reverse rotation of the set spindle, adapting to the lubrication requirements under different spindle rotation directions. The set spindle refers to the rotating shaft supported by the bearing 105 mounted on the bearing housing 1. The set spindle can be connected to the internal oil pump via a transmission structure such as a gear pair. Forward and reverse rotation here simply refer to two coaxial but different rotational trajectories, not a specific direction of rotation. In this embodiment, left-hand rotation of the set spindle is defined as forward rotation, and right-hand rotation as reverse rotation. This dual-pump design of left-handed pump 101 and right-handed pump 102 ensures that the system can smoothly and stably establish the oil pressure necessary for lubrication operation regardless of the shaft rotation condition, ensuring the circulation of lubricating oil.

[0030] The main oil tank 2 is used to store lubricating oil. The main oil tank 2 is equipped with an oil outlet and a return oil filter 201. The oil outlet is connected to the inlet of the left-hand pump 101 and the inlet of the right-hand pump 102 respectively. The return oil port 104 of the bearing housing 1 is connected to the main oil tank 2 through the return oil filter 201. The return oil filter 201 is mainly used to filter the lubricating oil returning to the main oil tank 2 to ensure the cleanliness of the returned oil. The return oil filter 201 can be a simple filter screen structure used to intercept larger particulate impurities in the lubricating oil returning from the bearing housing 1.

[0031] Cooler 3 is used to cool the lubricating oil in the system to maintain it within a suitable temperature range. Cooler 3 has a cooling inlet and a cooling outlet. The outlets of both the left-hand rotary pump 101 and the right-hand rotary pump 102 are connected to the cooling inlet, and the cooling outlet is connected to the oil inlet 103 of the bearing housing 1. The fact that both the outlets of the left-hand rotary pump 101 and the right-hand rotary pump 102 are connected to the cooling inlet means that regardless of whether the spindle rotates forward or backward, the lubricating oil pumped by the internal oil pump will be sent to cooler 3 for cooling. The cooling outlet of cooler 3 is connected to the oil inlet 103 of the bearing housing 1, ensuring that the cooled lubricating oil can be delivered to the bearing housing 1.

[0032] Filter 4 is used to filter the cooled lubricating oil to ensure that the lubricating oil entering the bearing housing 1 meets a higher cleanliness standard. Filter 4 is provided with a filter inlet and a filter outlet. The filter inlet is connected to the cooling outlet, and the filter outlet is connected to the oil inlet 103 of the bearing housing 1. The lubricating oil enters from the filter inlet, is filtered, and then discharged from the filter outlet. The lubricating oil cooled by the cooler 3 will pass through the filter 4 again for fine filtration before entering the bearing housing 1 to remove any possible tiny impurities and further improve the cleanliness of the lubricating oil.

[0033] Thus, by directly installing the internal oil pump inside the bearing housing 1 and making it operate synchronously with the set spindle, the dependence on an independent power source in traditional systems is effectively avoided, thereby simplifying the system structure and significantly reducing energy consumption. Furthermore, the configuration of a left-handed pump 101 and a right-handed pump 102 can adapt to the lubrication needs of the spindle's forward and reverse rotation, ensuring stable lubricating oil pressure under different operating conditions, thereby guaranteeing the healthy operation of the bearing 105.

[0034] In this embodiment, a high-level oil tank 6 is also included. The high-temperature oil tank is equipped with a high-level oil inlet 601103 and a return branch. The filter outlet of the filter 4 is also connected to the high-level oil inlet 601103. The return branch is connected to the main oil tank 2 through the return oil filter 201. Specifically, the high-level oil tank 6 is an oil storage container set at the highest point of the system or above the lubrication point. Its main function is to use gravitational potential energy to assist in oil supply to the system, ensuring that lubricating oil can still be supplied to the bearing housing 1 when the oil pump 7 and the oil pump in the bearing housing 1 cannot be started, the pump pressure is insufficient, or the system is momentarily short of oil. After the lubricating oil comes out of the filter outlet of the filter 4, it is divided into two parts. One part enters the oil supply indicator 5, and the other part enters the high-level oil tank 6. When the high-level oil tank 6 is full, it can flow back to the main oil tank 2 through the return pipe.

[0035] In this embodiment, the main oil tank 2 is also equipped with a starting oil pump 7, the outlet of which is connected to the cooling inlet of the cooler 3. Specifically, the starting oil pump 7 is an oil pump independent of the spindle drive. Its main function is to actively draw lubricating oil from the main oil tank 2 and deliver it to the lubrication system when the spindle is not yet started or is in a low-speed operating state. This starting oil pump 7 is typically an electric oil pump, driven by an independent motor, capable of providing stable oil pressure and flow to meet the pre-lubrication requirements of the bearing 105 under starting and low-speed conditions. The lubricating oil pumped by the starting oil pump 7 will also first enter the cooler 3 for heat exchange to ensure that the temperature of the lubricating oil is within a suitable range before lubricating the bearing 105, thereby providing effective cooling and lubrication for the bearing 105.

[0036] This embodiment also includes a piping system, which includes a main oil supply line, a main oil return line, branch oil supply lines, and an oil supply indicator 5. One end of the main oil supply line is connected to the filter outlet, and the other end is connected to the oil inlet 103 of the bearing housing 1 via the oil supply indicator 5. One end of the main oil return line is connected to the oil return port 104 of the bearing housing 1, and the other end is connected to the oil return filter 201. One end of the branch oil supply line is connected to the high-level oil inlet 601103 of the high-level oil tank 6, and the other end is connected to the main oil supply line, so that the high-level oil inlet 601103 and the cooling outlet form a passage. Specifically, the piping system described here is a collection of physical channels used to guide the flow of lubricating oil throughout the lubrication and cooling system of the bearing 105. Its main function is to connect various functional components, such as the oil tank, pump, cooler 3, filter 4, and bearing housing 1, to ensure that the lubricating oil can circulate according to a preset path to achieve the purposes of lubrication, cooling, and filtration. Piping systems typically consist of various pipes, joints, valves, and sensors. Their design must consider fluid resistance, pressure loss, sealing performance, and ease of installation and maintenance. In this embodiment, the oil circuits, valves, and sensors directly involved are essential components of the system. Those skilled in the art can add additional pipe circuits, valves, or sensors based on common knowledge in the field, such as installing a quick-drain valve in the main oil tank 2 or a maintenance bypass for the sensors. This is understandable to those skilled in the art and will not be elaborated upon here. The main oil supply line is the primary channel through which lubricating oil, after exiting the filter 4, is delivered to the oil inlet 103 of the bearing housing 1. This pipeline carries the cooled and filtered clean lubricating oil and is a crucial path to ensure sufficient lubrication for the bearing 105. Its design should ensure stable oil flow and appropriate pressure to meet the lubrication requirements of the bearing 105. The main return oil line is the primary channel through which lubricating oil, after exiting the bearing housing 1's return port 104, returns to the main oil tank 2. This pipeline is responsible for collecting the lubricated oil from the bearing 105 and guiding it to the return oil filter 201 for preliminary filtration before finally returning it to the main oil tank 2. The design of the main oil return line must consider the smoothness of oil return to avoid oil accumulation or poor oil return leading to excessively high oil levels in the bearing housing 1. The oil supply branch is an auxiliary channel connecting the high-level oil inlet 601103 of the high-level oil tank 6 to the main oil supply line. Its function is to receive lubricating oil from the cooling outlet to ensure the normal oil level in the high-level oil tank 6; or to introduce oil from the high-level oil tank 6 into the main oil supply line. This provides additional oil supply flexibility to the system, such as providing gravity-fed oil supply in case of main pump failure, or supplementing the main oil supply line to ensure continuous lubrication of the bearing 105. The oil supply indicator 5 is installed on the main oil supply line or the oil inlet 103 of the bearing housing 1 to monitor in real time whether the lubricating oil is being delivered normally to the bearing housing 1. It provides intuitive feedback on the oil flow status, such as by observing the oil flow, measuring pressure or temperature, to help operators determine whether the oil supply is normal. By introducing a structured piping system, the operational reliability and maintainability of the bearing 105 lubrication and cooling system can be significantly improved.In particular, the oil supply branch connects the high-level oil inlet 601103 of the high-level oil tank 6 to the main oil supply line, and makes the high-level oil inlet 601103 and the cooling outlet form a passage. This not only optimizes the oil replenishment mechanism of the high-level oil tank 6, enabling it to receive cooled oil, but also provides an additional oil source or bypass for the main oil supply line, enhancing the system's oil supply flexibility and redundancy under different operating conditions.

[0037] In this embodiment, the pipeline system also includes a main oil supply line for the oil pump, a left oil supply branch, a right oil supply branch, and a three-way oil supply valve 12. One end of the main oil supply line for the oil pump is connected to the oil outlet of the main oil tank 2, and the other end is connected to the left oil supply branch and the right oil supply branch respectively through the three-way oil supply valve 12. The inlet of the left-hand pump 101 is connected to the three-way oil supply valve 12 through the left oil supply branch, and the inlet of the right-hand pump 102 is connected to the three-way oil supply valve 12 through the right oil supply branch. In this embodiment, the pipeline system also includes a main oil return line of the oil pump, a left oil return branch, a right oil return branch, and a three-way oil return valve 13. The outlet of the left-hand pump 101 is connected to the three-way oil return valve 13 through the left oil return branch, and the outlet of the right-hand pump 102 is connected to the three-way oil return valve 13 through the right oil return branch. One end of the main oil return line of the oil pump is connected to the left oil return branch and the right oil return branch respectively through the three-way oil return valve 13. The other end of the main oil return line of the oil pump merges with the outlet of the starting oil pump 7 and is connected to the inlet of the cooler 3. Specifically, the oil supply three-way valve 12 and the oil return three-way valve 13 are used to adjust and establish the working status of the internal oil pump. Through the cooperation of the two three-way valves, one internal oil pump can be ensured to operate while the other is isolated. For example, when the spindle is set to left-hand rotation, the left-hand pump 101 is used to supply oil, while the right-hand pump is physically isolated; when the spindle is set to right-hand rotation, the right-hand pump 102 is used to supply oil, while the left-hand pump is physically isolated. The main oil return circuit of the oil pump merges with the outlet of the starting oil pump 7 and is then connected to the inlet of the cooler 3. This merging point allows the system to effectively deliver lubricating oil to the cooler 3 for heat exchange during spindle operation (supply by the internal oil pump) and during startup or shutdown (supply by the starting oil pump 7). This integrated oil return management scheme not only optimizes the oil delivery efficiency but also ensures that the cooler 3 can continuously receive the lubricating oil that needs cooling, thereby maintaining a suitable temperature of the lubricating oil in the bearing housing 1, ensuring the stable operation of the bearing 105, and extending its service life.

[0038] In this embodiment, the piping assembly also includes a three-valve group, which is located in the oil supply branch and before the high-level oil inlet 601103. The three-valve group consists of a shut-off valve 10, a check valve 9, and a throttle valve 11 connected in parallel. Specifically, the throttle valve 11 ensures that lubricating oil flows evenly and slowly into the bearing housing 1 to lubricate the bearing 105; the check valve 9 allows oil to quickly enter the high-level oil tank 6 when the oil pump is running, and blocks the rapid return of lubricating oil to the oil tank when the oil pump malfunctions; the shut-off valve 10 is used to quickly empty the high-level oil tank 6 during shutdown testing. Thus, by introducing a three-valve group consisting of the shut-off valve 10, the check valve 9, and the throttle valve 11 connected in parallel in the oil supply branch and placing it before the high-level oil inlet 601103, the control capability of the lubricating oil supply is greatly enhanced. This integrated application of a multi-functional valve group not only optimizes the distribution and management of lubricating oil, but also significantly improves the operational stability and reliability of the entire bearing 105 lubrication and cooling system, effectively extending the service life of the bearing 105.

[0039] In this embodiment, the piping assembly also includes a relief valve 8 and a return sight glass 602. The relief valve 8 is located before the cooling inlet and after the confluence of the main return oil line of the oil pump and the outlet of the starting oil pump 7, or the relief valve 8 is located at the confluence of the main return oil line of the oil pump and the outlet of the starting oil pump 7. The return sight glass 602 is installed on the return branch. Specifically, the relief valve 8 is a hydraulic control valve whose main function is to limit the maximum pressure in the hydraulic system to protect the system from overpressure damage. When the system pressure reaches the set value, the relief valve 8 will automatically open, returning excess hydraulic oil to the main oil tank 2, thereby maintaining the stability of the system pressure. The location of the relief valve 8 is crucial; it can be located before the cooling inlet and after the confluence of the main return oil line of the oil pump and the outlet of the starting oil pump 7, or at the confluence of the main return oil line of the oil pump and the outlet of the starting oil pump 7. Both of these configurations aim to effectively control the lubricating oil pressure entering the cooler 3, preventing damage to the cooler 3 or downstream pipelines due to excessive pressure, while ensuring that the lubricating oil enters the cooling process at an appropriate pressure to guarantee the cooling effect. Furthermore, both configurations allow the starting oil pump 7 and the internal oil pump in the bearing housing 1 to share resources, further simplifying the system structure. The return sight glass 602 is a device for visually observing the fluid flow status, allowing observation of whether the high-level oil tank 6 is working and full. Through the above technical solutions, this application effectively addresses the deficiencies in lubricating oil pressure control and system operation status monitoring. The introduction of the overflow valve 8 enables precise control of the lubricating oil pressure entering the cooler 3, preventing equipment damage caused by system pressure fluctuations or excessive pump output. Especially when the starting oil pump 7 or the internal oil pump is working, it can promptly release excess oil and return it, ensuring the safe operation of the cooler 3 and downstream pipelines, thereby extending the equipment's service life. Meanwhile, the reflux sight glass 602 provides operators with an intuitive and convenient observation window, enabling them to monitor the circulation status of the lubricating oil in real time. This includes determining whether there is oil flow, whether the flow is stable, and whether the oil is clean. This is of great significance for timely detection and handling of potential problems such as oil circuit blockage, pump failure, or abnormal oil level, and greatly improves the system's operational reliability, fault diagnosis efficiency, and maintenance convenience.

[0040] In this embodiment, the oil supply indicator 5 includes at least an oil flow sight glass, an oil supply pressure sensor 501, and an oil supply temperature sensor 502, all installed at the oil inlet 103 of the bearing housing 1. Specifically, the oil flow sight glass is a device for visually observing the flow of lubricating oil. It is typically made of transparent material and installed in the pipeline, allowing operators to directly visually inspect whether oil is flowing, whether the flow is continuous, and the cleanliness of the oil. Through the oil flow sight glass, it is possible to quickly determine whether lubricating oil is being supplied normally to the oil inlet 103 of the bearing housing 1, avoiding lubrication interruptions caused by oil circuit blockage or pump failure. The oil supply indicator 5 is used to monitor and display the lubricating oil supply status in real time, ensuring the normal operation of the lubrication system. Its main function is to provide intuitive or data-driven information on key parameters such as lubricating oil flow rate, pressure, and temperature, so that operators or the control system can adjust the lubricating oil parameters entering the bearing housing 1 in a timely manner, and promptly detect and address potential lubrication problems.

[0041] In this embodiment, the main oil tank 2 is equipped with an oil level sight glass, an oil level indicator 204, a heater 203, an oil level sensor 205, and an oil tank temperature sensor 202. The oil level sight glass, oil level sensor 205, and oil level indicator 204 ensure that the amount of lubricating oil meets the requirements, while the heater 203 and oil tank temperature sensor 202 ensure that the lubricating oil temperature meets the requirements. The filter 4 is equipped with a differential pressure sensor 401, with its two ends connected to the filter inlet and filter outlet of the filter 4, respectively. The differential pressure sensor 401 can monitor the clogging of the filter 4 for timely replacement. The high-level oil tank 6 is also equipped with a one-way vent valve 603. This valve allows air to escape from the high-level oil tank 6, preventing air from accumulating in the high-level oil tank 6 and forming air resistance, which would affect the stable supply of lubricating oil. At the same time, this valve can prevent external air from entering the high-level oil tank 6, reducing the contact between lubricating oil and air, thereby delaying the oxidation process of the lubricating oil and maintaining its performance. In a preferred embodiment, an oil baffle 106 of a certain height is provided in the side cover of the bearing housing 1. The oil baffle 106 ensures that a certain amount of lubricating oil remains in the bearing housing 1 when the bearing 105 is started, so that it can still start normally even if the oil pump 7 malfunctions. The cooler 3 in this embodiment is also equipped with monitoring elements such as a coolant inlet temperature sensor 301, a coolant inlet pressure sensor 302, a coolant outlet pressure sensor 303, an oil outlet temperature sensor 304, and an oil outlet pressure sensor 305 to ensure that the cooling effect of the coolant and the temperature of the lubricating oil meet the requirements. It should be noted that although the oil outlet temperature sensor 304 and the oil outlet pressure sensor 305 monitor the cooling effect of the cooler 3, their specific location is after the filter 4 to monitor the temperature of the lubricating oil that finally enters the bearing housing 1, ensuring the final cooling effect of the cooler 3.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0043] The above descriptions are merely embodiments of the present invention. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, under the guidance of this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention. These should also be considered within the scope of protection of the present invention, and will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A bearing lubrication and cooling system, characterized in that, include: The bearing housing is equipped with an oil inlet and an oil return port. An internal oil pump is also installed inside the bearing housing. The internal oil pump can operate synchronously with the rotation of the set spindle to establish lubricating oil pressure. There are two internal oil pumps, namely a left-hand pump and a right-hand pump. The left-hand pump operates in accordance with the rotation of the set spindle in the forward direction, and the right-hand pump operates in accordance with the rotation of the set spindle in the reverse direction. The main oil tank is used to store lubricating oil. The main oil tank is equipped with an oil outlet and a return oil filter. The oil outlet is connected to the inlet of the left-hand pump and the inlet of the right-hand pump, respectively. The return oil port of the bearing housing is connected to the main oil tank through the return oil filter. A cooler is used to cool lubricating oil. The cooler is provided with a cooling inlet and a cooling outlet. The outlet of the left-hand pump and the outlet of the right-hand pump are both connected to the cooling inlet. The cooling outlet is connected to the oil inlet of the bearing housing. A filter is used to filter the cooled lubricating oil. The filter is provided with a filter inlet and a filter outlet. The filter inlet is connected to the cooling outlet, and the filter outlet is connected to the oil inlet of the bearing housing.

2. The bearing lubrication and cooling system according to claim 1, characterized in that: It also includes a high-level oil tank, which is equipped with a high-level oil inlet and a return branch. The filter outlet of the filter is also connected to the high-level oil inlet, and the return branch is connected to the main oil tank through a return oil filter.

3. The bearing lubrication and cooling system according to claim 2, characterized in that: The main oil tank is also equipped with a starting oil pump, the outlet of which is connected to the cooling inlet of the cooler.

4. A bearing lubrication and cooling system according to claim 3, characterized in that: It also includes a pipeline system, which includes a main oil supply line, a main oil return line, a branch oil supply line, and an oil supply indicator. One end of the main oil supply line is connected to the filter outlet, and the other end is connected to the oil inlet of the bearing housing through the oil supply indicator. One end of the main oil return line is connected to the oil return port of the bearing housing, and the other end is connected to the oil return filter; one end of the oil supply branch is connected to the high-level oil inlet of the high-level oil tank, and the other end is connected to the main oil supply line, so that the high-level oil inlet and the cooling outlet form a passage.

5. A bearing lubrication and cooling system according to claim 4, characterized in that: The pipeline system also includes a main oil supply line for the oil pump, a left oil supply branch, a right oil supply branch, and a three-way oil supply valve. One end of the main oil supply line for the oil pump is connected to the outlet of the main oil tank, and the other end is connected to the left oil supply branch and the right oil supply branch respectively through the three-way oil supply valve. The inlet of the left-hand pump is connected to the three-way oil supply valve through the left oil supply branch, and the inlet of the right-hand pump is connected to the three-way oil supply valve through the right oil supply branch.

6. A bearing lubrication and cooling system according to claim 5, characterized in that: The piping system also includes a main return oil circuit for the oil pump, a left return oil branch, a right return oil branch, and a return oil three-way valve. The outlet of the left-hand pump is connected to the return oil three-way valve through the left return oil branch, and the outlet of the right-hand pump is connected to the return oil three-way valve through the right return oil branch. One end of the main return oil circuit for the oil pump is connected to the left return oil branch and the right return oil branch respectively through the return oil three-way valve. The other end of the main return oil circuit for the oil pump merges with the outlet of the starting oil pump and is connected to the inlet of the cooler.

7. A bearing lubrication and cooling system according to claim 6, characterized in that: The pipeline assembly also includes a three-valve group, which is located in the oil supply branch and before the high-level oil inlet. The three-valve group consists of a shut-off valve, a check valve, and a throttle valve arranged in parallel.

8. A bearing lubrication and cooling system according to claim 7, characterized in that: The piping assembly also includes an overflow valve and a return sight glass. The overflow valve is located before the cooling inlet and after the confluence of the main return oil circuit of the oil pump and the outlet of the start-up oil pump, or the overflow valve is located at the confluence of the main return oil circuit of the oil pump and the outlet of the start-up oil pump. The return sight glass is installed on the return branch.

9. A bearing lubrication and cooling system according to claim 8, characterized in that: The oil supply indicator includes at least an oil flow sight glass, an oil supply pressure sensor, and an oil supply temperature sensor installed at the oil inlet of the bearing housing.

10. A bearing lubrication and cooling system according to claim 9, characterized in that: The main oil tank is equipped with an oil level sight glass, an oil level indicator, a heater, and an oil tank temperature sensor; the filter is equipped with a differential pressure sensor, the two ends of which are respectively connected to the filter inlet and filter outlet; the high-level oil tank is also equipped with a one-way vent valve.

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