Method and device for testing cooling performance of lubricating oil of thrust bearing

Abstract

The invention relates to the field of hydro-generators, and discloses a thrust bearing lubricating oil cooling performance test method and device, and the method comprises the steps: collecting the temperature data of lubricating oil in an oil storage tank, and transmitting the collected temperature data to a PID heating controller; the PID heating controller controls the output power of the power output part according to the collected temperature; the power output piece controls the high-frequency electromagnetic induction coil to heat the lubricating oil; collecting the temperature of the heated lubricating oil, and judging whether the temperature of the heated lubricating oil is greater than or equal to a given temperature; according to the judgment result, the PID heating controller controls and adjusts the output power of the power output part or stops the machine again; the method has the advantages that the lubricating oil in the oil storage tank can be heated to the required temperature through the method, the method can adapt to many scenes, the test efficiency is improved, installation and maintenance are more convenient, the safety performance is higher, direct contact with the lubricating oil is not needed, and the pollution risk is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of hydroelectric generators, and in particular to a thrust bearing lubricating oil cooling performance testing method and device. BACKGROUND

[0002] The thrust bearing is an important component of the hydroelectric generator set, and its working performance is crucial to the stable operation of the hydroelectric generator set. The thrust bearing of the vertical hydroelectric generator set is mainly used to bear the total weight of the rotating part of the unit and the axial water thrust, and to transmit the huge axial load it bears to the foundation. The oil film between the mirror plate and the thrust pad of the thrust bearing is lubricated by oil film, and a large amount of heat is generated by the shearing action of the oil film. When the unit is running, the oil tank of the thrust bearing is filled with lubricating oil, which is rotated by the rotating part of the bearing, and the lubricating oil flows between the bearing and the cooler, playing a lubricating and cooling role, thereby ensuring that the bearing temperature is maintained within the normal temperature threshold, preventing the thrust bearing pad from overheating and even burning out.

[0003] In order to ensure the reliability of the thrust bearing in actual power production, model tests are often carried out before delivery. By building a hydroelectric generator thrust bearing test bench, the actual operating conditions of the thrust bearing are simulated, and the operating characteristics of the thrust bearing under various operating conditions are explored. When studying the cooling performance of the thrust bearing oil circulation cooling system, the test bench generally loads high-pressure oil and loads counterweight blocks to realize the axial load loading of the thrust bearing, and rotates the rotating parts such as the main shaft and the mirror plate by the motor to make the oil film sheared and the temperature rises, and then the cooling performance of the thrust bearing cooling system is studied.

[0004] However, the increased weight of the hydraulic loading system or rotating parts not only makes the test bench structure complex and increases the cost of building the test bench, but also reduces the safety of the test work, and this method is also not suitable for laboratories and other places. SUMMARY

[0005] Therefore, the technical problem to be solved by the present application is that the increased weight of the hydraulic loading system or rotating parts not only makes the test bench structure complex and increases the cost of building the test bench, but also reduces the safety of the test work, and this method is also not suitable for laboratories and other places.

[0006] The above technical problems are solved by the following technical solutions: the present application provides a thrust bearing lubricating oil cooling performance testing method, which comprises

[0007] Collecting temperature data of the lubricating oil in the oil storage tank and transmitting the collected temperature data to the PID heating controller;

[0008] The PID heating controller controls the output power of the power output according to the collected temperature;

[0009] The power output controls the high-frequency electromagnetic induction coil to heat the lubricating oil.

[0010] The temperature T of the heated lubricating oil is collected, and it is determined whether the temperature T of the heated lubricating oil is greater than or equal to a given temperature T set ;

[0011] According to the determination result, the PID heating controller controls the output power of the power output or stops again.

[0012] In a preferred embodiment of the thrust bearing lubricating oil cooling performance test method, the determination of whether the temperature T of the heated lubricating oil is greater than or equal to a given temperature T set includes,

[0013] If yes, the output power of the power output is reduced by the PID heating controller;

[0014] If no, the output power of the power output is increased;

[0015] If over-temperature, emergency stop.

[0016] Another object of the present application is to provide a thrust bearing lubricating oil cooling performance test device, which includes setting related parameters, including a heating unit for heating the lubricating oil in the oil tank; a collection unit for collecting temperature data of the lubricating oil in the oil tank; wherein the heating unit includes a PID heating controller and a power output, the PID heating controller can receive the data collected by the collection unit, and the PID heating controller can control the power output to heat the lubricating oil in the oil tank to the required temperature according to the received data.

[0017] In a preferred embodiment of the thrust bearing lubricating oil cooling performance test device, the heating unit further includes a high-frequency electromagnetic induction coil and an electromagnetic shielding strip, the high-frequency electromagnetic induction coil is spirally wound around the outer circle of the oil tank, both ends of the high-frequency electromagnetic induction coil are connected with the power output through a cable, and the electromagnetic shielding strip is uniformly arranged around the outer circle of the oil tank.

[0018] In a preferred embodiment of the thrust bearing lubricating oil cooling performance test device, the test unit further includes a test unit, the test unit includes a support, a test assembly mounted on the support, a power assembly coaxially arranged with the test assembly, and a circulating assembly.

[0019] In a preferred embodiment of the thrust bearing lubricating oil cooling performance test device: the test assembly includes an oil basin mounted on the top of the support, the bottom of the oil basin is provided with a thrust pad, and a support steel plate is arranged above the oil basin, the oil storage tank is fixedly installed above the support steel plate, an oil basin cover plate is arranged above the oil storage tank, a thrust bearing seat is arranged below the thrust pad, and the thrust bearing seat is fixedly installed on the bottom of the oil basin.

[0020] In a preferred embodiment of the thrust bearing lubricating oil cooling performance test device: the power assembly includes a driving motor mounted at the bottom end of the support and a rotating shaft connected to the output end of the driving motor through a shaft coupling, the upper end of the rotating shaft extends above the oil basin, and the rotating shaft is coaxially arranged with the oil basin.

[0021] In a preferred embodiment of the thrust bearing lubricating oil cooling performance test device: the outer ring of the rotating shaft is provided with a thrust head through bolts, the bottom of the thrust head is provided with a mirror plate through bolts, and the outer ring of the thrust head is provided with a guide bearing, and the guide bearing is installed on one end of the support steel plate close to the rotating shaft.

[0022] A gap is left between the guide bearing and the thrust head, and a gap is left between the top of the thrust pad and the bottom of the mirror plate.

[0023] In a preferred embodiment of the thrust bearing lubricating oil cooling performance test device: the bottom of the oil storage tank is uniformly and annularly provided with a first oil pipe and a second oil pipe, and the first oil pipe and the second oil pipe are arranged in the gaps between the guide bearings and the gaps between the thrust pads, respectively.

[0024] In a preferred embodiment of the thrust bearing lubricating oil cooling performance test device: the circulating assembly includes an oil pump and a cooler connected to the inlet end of the oil pump, the oil pump is communicated with the oil storage tank through an oil inlet pipe, and the cooler is communicated with the bottom of the oil basin through an oil outlet pipe.

[0025] The method has the advantages that the lubricating oil in the oil storage tank can be heated to the required temperature, the method can adapt to more scenes, improve the test efficiency, is more convenient to install and maintain, has higher safety performance, and does not need to directly contact the lubricating oil, thereby avoiding the pollution risk. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below only relate to some embodiments of the present application, but not limit the present application. Among them:

[0027] Figure 1 Control system flow chart for heating unit

[0028] Figure 2 Working principle diagram for heating unit

[0029] Figure 3 Given temperature change curve for heating unit

[0030] Figure 4 The structure diagram of the thrust bearing lubricating oil cooling performance test method and device is shown.

[0031] Figure 5 The front view of the thrust bearing lubricating oil cooling performance test method and device is shown.

[0032] Figure 6 The structure diagram of the heating unit is shown. DETAILED DESCRIPTION

[0033] In order to make the person skilled in the art better understand the present application, the present application will be further described in detail below in combination with specific embodiments and drawings.

[0034] The terms used in the present application are those general terms currently widely used in the art in consideration of the functions about the present application, but these terms can be changed according to the intention of the person skilled in the art, precedents or new technology in the art. In addition, specific terms can be selected by the applicant, and in this case, the detailed meaning thereof will be described in the detailed description of the present application. Therefore, the terms used in the specification should not be understood as simple names, but based on the meaning of the terms and the overall description of the present application.

[0035] Example 1

[0036] Reference Figures 1-6 , the first embodiment of the present application, the embodiment provides a thrust bearing lubricating oil cooling performance test device, which comprises

[0037] Collect the temperature data of the lubricating oil in the oil storage tank 225, and transmit the collected temperature data to the PID heating controller 11;

[0038] The PID heating controller 11 controls the output power of the power output 12 according to the collected temperature;

[0039] The power output 12 controls the high-frequency electromagnetic induction coil 13 to heat the lubricating oil;

[0040] Collect the temperature T of the heated lubricating oil, and determine whether the temperature T of the heated lubricating oil is greater than or equal to the given temperature T set ;

[0041] According to the judgment result, the PID heating controller 11 controls the output power of the power output element 12 or stops again.

[0042] Before the test, the relevant parameters need to be set, including the given temperature T set , the proportional coefficient K P of the controller, the integral coefficient K I of the controller, the differential coefficient K D of the controller, the sampling time t, the maximum heating power N max , the setting of the maximum heating power, which can effectively prevent the power from being too large and causing the operation failure of the heating unit 1.

[0043] Through the setting of the PID heating controller 11, the output power of the power output element 12 can be adjusted, and the high-frequency electromagnetic induction coil 13 is controlled by the power output element 12 to heat, so as to heat the lubricating oil in the oil tank 225. In this process:

[0044] Firstly, during the test, the temperature of the lubricating oil at the inlet of the existing hydro-generator cooler needs to be collected first. The temperature of the lubricating oil is the heat absorbed by the lubricating oil in the oil pan due to friction. Based on this temperature, the corresponding temperature parameter is set on the PID heating controller 11 as the given temperature. Then, according to the temperature of the lubricating oil collected by the collection unit in the test device oil tank 225, it should be noted that the collection unit is usually a temperature sensor, which is arranged inside the oil tank 225 and used to detect the temperature of the lubricating oil in the oil tank 225. Then, the PID heating controller 11 calculates the temperature deviation signal e(t) according to the received given temperature and the temperature measured by the temperature sensor. The specific formula is as follows:

[0045] e(t) = T set -T

[0046] Where T set is the given temperature, and T is the temperature of the lubricating oil measured by the temperature sensor.

[0047] The PID heating controller 11 changes the output power u(t) according to the above calculated temperature deviation signal e(t). The power output element 12 converts the commercial power into high-frequency current. The high-frequency current generates a high-frequency magnetic field in the high-frequency electromagnetic induction coil 13. The outer wall of the oil tank 225 located in the high-frequency magnetic field generates eddy current. Under the action of the resistance effect, the eddy current converts electrical energy into heat energy. The outer wall of the oil tank 225 rapidly heats up, and the heat is transferred from the outer wall of the oil tank 225 to the lubricating oil in the oil tank 225, causing the temperature of the lubricating oil to rapidly rise. In this process, there is also a related heat loss power P loss related to the ambient temperature T amb , and the related formula is as follows:

[0048] The heating output power of the power output 12 is:

[0049]

[0050] wherein K P is the proportional coefficient of the controller, K I is the integral coefficient of the controller, K D is the differential coefficient of the controller, and t is the sampling time.

[0051] The thermodynamic model of the lubricating oil heating system is:

[0052]

[0053] wherein c is the specific heat capacity of the lubricating oil, with the unit of J / (kg·K); P loss is the heat loss power, with the unit of W;

[0054]

[0055] wherein T amb is the ambient temperature, and R is the coil thermal resistance.

[0056] It should be noted that the conventional thrust bearing test bench often realizes the axial load loading through loading high-pressure oil and loading counterweight blocks, however, the increased hydraulic loading system or the weight of the rotating parts not only increases the cost of building the test bench and complicates the structure of the test bench, but also reduces the safety and reliability of the test bench.

[0057] Therefore, the heating unit 1 is used to heat the lubricating oil in the oil storage tank 225, the heating speed is fast, and the thermal efficiency is high; and the lubricating oil is not directly contacted during the heating process, so that the pollution risk is avoided; the heating power output by the power output 12 is controlled by the PID heating controller 11, so that the lubricating oil temperature is easily controlled to change within the given value range.

[0058] Further, it is judged whether the temperature T of the heated lubricating oil is greater than or equal to the given temperature T set including,

[0059] If yes, the output power of the power output 12 is reduced by the PID heating controller 11;

[0060] If no, the output power of the power output 12 is increased;

[0061] If over-temperature, emergency stop.

[0062] This test bench, based on actual operating parameters of a power station, utilizes an electromagnetic induction heater to heat the lubricating oil, mitigating the heat loss in the thrust bearing due to axial load. To avoid significant unit vibration caused by tailrace vortexes, hydroelectric units typically operate within a 70%–100% Pr load range during actual operation. Therefore, according to… Figure 5 As shown, this invention fits the inlet temperature of the cooler of the hydro-generator unit into a temperature change curve under the operation of 65%-100% Pr, and uses it as the given signal of the heating unit 1. The temperature sensor in the oil tank 225 measures the temperature of the lubricating oil in the tank. The temperature transmitter sends the measured temperature signal to the system input through the feedback loop and compares it with the given temperature. The PID heating controller 11 changes the power output of the power output component 12 according to the deviation between the measured temperature and the given temperature, thereby ensuring that the thrust bearing lubricating oil in the oil tank 225 matches the given temperature value. Furthermore, by measuring the temperature of the lubricating oil at the end of the oil outlet pipe 244 near the cooler 243, the temperature change of the lubricating oil is determined.

[0063] Example 2

[0064] Reference Figures 4-6 This is the second embodiment of the present invention. Based on the first embodiment, this embodiment proposes a thrust bearing lubricating oil cooling performance testing device, which includes a heating unit 1 for heating the lubricating oil in the oil tank 225; and a data acquisition unit for acquiring temperature data of the lubricating oil in the oil tank 225. The heating unit 1 includes a PID heating controller 11 and a power output device 12. The PID heating controller 11 can receive the data acquired by the data acquisition unit, and the PID heating controller 11 can control the power output device 12 to deheat and raise the temperature of the lubricating oil in the oil tank 225 to the required temperature according to the received data.

[0065] The heating unit 1 replaces the existing method of loading high-pressure oil and counterweights to achieve axial load on the thrust bearing. Instead, it uses a motor to drive the main shaft, mirror plate, and other rotating parts to rotate, causing the oil film to be sheared and its temperature to rise. This not only reduces the load on the device, but also improves the heating efficiency of the lubricating oil during the test, making it suitable for more applications.

[0066] Furthermore, the heating unit 1 also includes a high-frequency electromagnetic induction coil 13 and an electromagnetic shielding strip 14. The high-frequency electromagnetic induction coil 13 is spirally wound around the outer ring of the oil tank 225. Both ends of the high-frequency electromagnetic induction coil 13 are connected to the power output component 12 via cables. The electromagnetic shielding strip 14 is evenly arranged around the outer ring of the oil tank 225.

[0067] The electromagnetic shielding strip 14 can effectively absorb or reflect the leaked electromagnetic strip, constrain the leaked electromagnetic strip in the heating system, significantly reduce the electromagnetic radiation to the outside, more effectively transmit the energy to the heated body, and improve the heating efficiency and working speed; the electromagnetic shielding strip 14 can form an effective isolation area, protect the core control part from interference, and improve the reliability and stability of operation; finally, the electromagnetic shielding strip 14 can make the magnetic field distribution more uniform, and improve the heating effect.

[0068] Embodiment 3

[0069] With reference to Figures 4-6 Figures 4-6 For a third embodiment of the present application, the third embodiment is based on the second embodiment, and further comprises a test unit 2, the test unit 2 comprising a support 21, a test assembly 22 mounted on the support 21, a power assembly 23 coaxially arranged with the test assembly 22, and a circulating assembly 24.

[0070] Through the arrangement of the support 21, stable support and installation basis can be provided for the device, the test assembly 22 and the power assembly 23 can simulate the existing water turbine generator thrust bearing, ensure that it fits the actual use scene, and the circulating assembly 24 realizes the circulation of the lubricating oil.

[0071] The support 21 is a stainless steel structure, which is formed by welding or assembling an upper disc, a lower disc and a plurality of struts, and the support 21 is fixed to the ground by anchor bolts.

[0072] Specifically, the test assembly 22 comprises an oil pan 221 mounted on the top of the support 21, a thrust pad 224 arranged at the bottom of the oil pan 221, a support steel plate 227 arranged above the oil pan 221, an oil storage tank 225 fixedly installed above the support steel plate 227, an oil pan cover plate 228 arranged above the oil storage tank 225, a thrust bearing seat arranged below the thrust pad 224, and the thrust bearing seat is fixed at the bottom of the oil pan 221, and the thrust bearing seat supports the thrust pad 224 through heavy resistance bolts.

[0073] The oil pan 221 is a hollow annular structure, and the oil pan 221 is used to receive the lubricating oil flowing down from the oil storage tank 225 and is delivered out through the oil outlet pipe 244 connected below, and the hollow part can pass through the rotating shaft 232, and the oil pan 221 is coaxially arranged with the support 21 to ensure the stability of the support 21 to the oil pan 221.

[0074] Specifically, the power assembly 23 comprises a driving motor 231 mounted at the bottom end of the support 21 and a rotating shaft 232 connected to the output end of the driving motor 231 through a shaft coupling, the upper end of the rotating shaft 232 extends above the oil pan 221, and the rotating shaft 232 is coaxially arranged with the oil pan 221.

[0075] Further, the outer ring of the rotating shaft 232 is provided with the thrust head 222 through bolts, the bottom of the thrust head 222 is provided with the mirror plate 223 through bolts, the outer ring of the thrust head 222 is provided with the guide bearing 226, and the guide bearing 226 is installed on the support steel plate 227 close to one end of the rotating shaft 232.

[0076] The driving motor 231 is connected with the support 21 through bolts, the driving motor 231 is coaxially arranged with the support 21, the output end of the driving motor 231 faces upward, the output end of the driving motor 231 is connected with the rotating shaft 232 through a shaft coupling, and the rotating shaft 232 passes through the oil pan 221 to the upper side of the oil pan 221.

[0077] Further, the gap is left between the guide bearing 226 and the thrust head 222, and the gap is left between the top of the thrust pad 224 and the bottom of the mirror plate 223.

[0078] The guide bearing 226 is a wedge plate type guide bearing, which comprises a guide bearing bush, a wedge plate and a bearing seat, the bearing seat is fixed on the oil pan steel plate 227 close to one end of the rotating shaft 232, the bearing seat supports the guide bearing bush through heavy resistance bolts, and the radial gap between the guide bearing bush and the thrust head 222 can be changed by adjusting the position of the wedge plate.

[0079] The gap exists between the guide bearing 226 and the thrust head 222, and the gap exists between the guide bearing bush and the thrust head 222, in the test process, the guide bearing 226 can limit the radial displacement and swing of the rotating part, the plurality of guide bearing bushes are annularly distributed, the gap exists between the plurality of guide bearing bushes, the plurality of thrust pads 224 are also provided, annularly distributed around the rotating shaft 232, and the gap exists between the plurality of thrust pads 224.

[0080] The thrust pads 224 are uniformly arranged below the mirror plate 223, and the gap is left between the top of the thrust pad 224 and the bottom of the mirror plate 223, in order to monitor the temperature of the thrust pad in real time, the temperature sensor is installed in the inside of each thrust pad 224, and the temperature sensor is connected with the control system, so that the user can view the related temperature data.

[0081] When the thrust head 222 rotates, since the first oil pipe and the second oil pipe are provided with radial openings at positions between the guide bearing bush gap and the thrust pad 224 gap, the lubricating oil enters the gap between the guide bearing 226 and the thrust head 222 and the gap between the thrust pad 224 and the mirror plate 223 during oil feeding, for lubrication and can take away the heat generated by friction, since the device is a lubricating oil cooling performance test device, the lubricating oil has been heated to the required temperature, so the effect of taking away the heat is not reflected.

[0082] Specifically, the bottom of the oil storage tank 225 is uniformly annularly distributed with first oil pipes and second oil pipes, and the first oil pipes and the second oil pipes are arranged in the gaps between the guide bearings 226 and the gaps between the thrust pads 224, respectively.

[0083] The oil storage tank 225 is fixed on the upper part of the support steel plate 227 by means of a compression bolt, and is annular barrel-shaped and coaxial with the support 21. The side surface of the oil storage tank 225 is uniformly arranged with oil inlet holes, and the lower part is uniformly arranged with first oil pipes and second oil pipes. The first oil pipes and the second oil pipes of the oil storage tank 225 extend out of the inside of the oil basin 221 through the support steel plate 227, and are L-shaped. The shape can also be changed according to actual use requirements, and is not specifically limited here. The inside of the oil storage tank 225 is provided with a collection unit, and the collection unit used here is a temperature sensor. The outer surface of the oil storage tank 225 is coated with a high-temperature-resistant epoxy resin coating that plays an insulating role.

[0084] Further, the first oil pipes and the second oil pipes are respectively provided with electric valves. When the lubricating oil is heated to the required temperature, the lubricating oil in the oil storage tank 225 flows downward again.

[0085] Specifically, the circulating assembly 24 includes an oil pump 242 and a cooler 243 connected to the inlet end of the oil pump 242. The oil pump 242 is in communication with the oil storage tank 225 through an oil inlet pipe 241, and the cooler 243 is in communication with the bottom of the oil basin 221 through an oil outlet pipe 244.

[0086] The circulating assembly 24 is an external cooling circulating device for lubricating oil. The oil inlet pipe 241 of the circulating assembly 24 is connected to the oil inlet hole on the side surface of the oil storage tank 225, and the oil outlet pipe 244 is connected to the bottom of the oil basin 221. The oil pump 242 provides corresponding power for oil transmission of the oil inlet pipe 241, and through the arrangement of the cooler 243, the lubricating oil can be cooled to an appropriate temperature under test conditions, which is convenient for subsequent test use.

[0087] In use, first, the support 21 is fixed in a suitable position, then, the lubricating oil required for the test is placed in the oil tank 225, then the temperature parameters obtained by the existing water turbine generator thrust bearing are set for the PID heating controller 11, and the PID heating controller 11 receives the temperature measured by the temperature sensor inside the oil tank 225, and adjusts the output power of the power output 12 by the embodiment 1, heats the lubricating oil in the oil tank 225 to the required temperature, then opens the electric valves on the first oil pipe and the second oil pipe, and the lubricating oil lubricates the guide bush and the thrust bush respectively, simulates the heat taken away by the lubricating oil when it flows in the existing device, and the lubricating oil falls into the oil pan 221, then enters the cooler 243 through the oil outlet pipe 244, collects the temperature of the lubricating oil when it enters the cooler 243, so as to obtain the cooling effect of the lubricating oil when it flows out through the oil outlet pipe 244, and thus infer whether it can be used for the lubrication and cooling of the existing water turbine generator thrust bearing, and different lubricating oils have different cooler inlet temperatures and bush temperatures through such a test device, so as to evaluate the cooling performance of different types of lubricating oils.

[0088] Finally, it should be noted that the above detailed description of the system and device is only an embodiment, and those skilled in the art can modify the embodiment in different ways without departing from the scope of the present application.

Claims

1. A method for testing the cooling performance of thrust bearing lubricating oil, characterized in that: include The temperature data of the lubricating oil in the oil tank (225) is collected and transmitted to the PID heating controller (11); The PID heating controller (11) controls the output power of the power output device (12) according to the collected temperature; The power output unit (12) controls the high-frequency electromagnetic induction coil (13) to heat the lubricating oil; Collect the temperature T of the lubricating oil after heating, and determine whether the temperature T of the lubricating oil after heating is greater than or equal to a given temperature T. set ; Based on the judgment result, the PID heating controller (11) controls the output power of the power output component (12) again or stops the machine.

2. The method for testing the cooling performance of thrust bearing lubricating oil according to claim 1, characterized in that: The determination of whether the temperature T of the heated lubricating oil is greater than or equal to a given temperature T set include, If so, the output power of the power output unit (12) is reduced by the PID heating controller (11); If not, increase the output power of the power output unit (12); If the temperature exceeds the limit, the machine will be shut down immediately.

3. A device for testing the cooling performance of thrust bearing lubricating oil, characterized in that: The method for testing the cooling performance of thrust bearing lubricating oil as described in any one of claims 1 to 2, and Heating unit (1) is used to heat the lubricating oil in oil tank (225); The data acquisition unit is used to acquire temperature data of the lubricating oil in the oil reservoir (225); The heating unit (1) includes a PID heating controller (11) and a power output device (12). The PID heating controller (11) can receive data collected by the acquisition unit, and the PID heating controller (11) can control the power output device (12) to heat the lubricating oil in the oil tank (225) to the required temperature according to the received data.

4. The thrust bearing lubricating oil cooling performance testing device according to claim 3, characterized in that: The heating unit (1) also includes a high-frequency electromagnetic induction coil (13) and an electromagnetic shielding strip (14). The high-frequency electromagnetic induction coil (13) is spirally wound around the outer ring of the oil tank (225). Both ends of the high-frequency electromagnetic induction coil (13) are connected to the power output device (12) via cables. The electromagnetic shielding strip (14) is evenly arranged around the outer ring of the oil tank (225).

5. The thrust bearing lubricating oil cooling performance testing device according to claim 3, characterized in that: It also includes a test unit (2), which includes a bracket (21), a test component (22) on the mounting bracket (21), a power component (23) coaxially arranged with the test component (22), and a circulation component (24).

6. The thrust bearing lubricating oil cooling performance testing device according to claim 5, characterized in that: The test assembly (22) includes an oil pan (221) installed on the top of the bracket (21). A thrust bearing (224) is provided at the bottom of the oil pan (221) and a support steel plate (227) is provided above the oil pan (221). An oil storage tank (225) is fixedly installed above the support steel plate (227). An oil pan cover plate (228) is provided above the oil storage tank (225). A thrust bearing seat is provided below the thrust bearing (224). The thrust bearing seat is fixed at the bottom of the oil pan (221). The thrust bearing seat supports the thrust bearing (224) by anti-weight bolts.

7. The thrust bearing lubricating oil cooling performance testing device according to claim 6, characterized in that: The power assembly (23) includes a drive motor (231) mounted on the bottom of the bracket (21) and a rotating shaft (232) connected to the output end of the drive motor (231) via a coupling. The upper end of the rotating shaft (232) extends above the oil pan (221), and the rotating shaft (232) is coaxial with the oil pan (221).

8. The thrust bearing lubricating oil cooling performance testing device according to claim 7, characterized in that: The outer ring of the rotating shaft (232) is bolted with a thrust head (222), and the bottom of the thrust head (222) is bolted with a mirror plate (223). The outer ring of the thrust head (222) is provided with a guide bearing (226), and the guide bearing (226) is installed on the end of the supporting steel plate (227) near the rotating shaft (232). There is a gap between the guide bearing (226) and the thrust head (222), and there is a gap between the top of the thrust pad (224) and the bottom of the mirror plate (223).

9. The thrust bearing lubricating oil cooling performance testing device according to claim 8, characterized in that: The bottom of the oil storage tank (225) is evenly and annularly distributed with a first oil supply pipe and a second oil supply pipe. The first oil supply pipe and the second oil supply pipe are respectively set in the gap between the guide bearing (226) and the gap between the thrust bearing (224).

10. The thrust bearing lubricating oil cooling performance testing device according to claim 9, characterized in that: The circulation component (24) includes an oil pump (242) and a cooler (243) connected to the inlet end of the oil pump (242). The oil pump (242) is connected to the oil storage tank (225) through the oil inlet pipe (241), and the cooler (243) is connected to the bottom of the oil basin (221) through the oil outlet pipe (244).

Images