A polymer thrust bearing

Abstract

The present invention discloses a polymer thrust bearing, which comprises at least one third thrust pad and a temperature measuring element, wherein the third thrust pad has an oil hole and a mounting hole, wherein: the oil hole is a blind hole opened perpendicular to the pad surface of the third thrust pad, the mounting hole is parallel to the pad surface of the third thrust pad and vertically connected to the oil hole, the temperature measuring element is installed in the mounting hole, and the lubricating oil flows through the temperature measuring element when flowing in the oil hole. The present invention adopts a direct temperature measurement method for the polymer thrust bearing, so that the temperature sensor contacts the lubricating oil in the oil film of the sliding bearing, and can directly measure the lubricating oil temperature of the polymer material sliding bearing, and when the bearing operation condition deteriorates, the lubricating oil temperature change is reflected in real time, and the bearing instantaneous operation state monitoring is provided to the user, thereby protecting the thrust sliding bearing.

Description

Technical Field

[0001] The invention relates to a polymer thrust bearing, and belongs to the field of bearings, in particular to the field of new material bearings. Background Art

[0002] With the development of industry, the load and speed of ordinary machinery have also increased. High-speed and heavy-load equipment and components have higher and higher requirements for bearings. Traditional Babbitt alloy bearings can no longer meet the needs of development. Compared with traditional Babbitt alloy bearings, radial bearings and thrust bearings made of polymer materials (modified PTFE or PEEK) have better wear resistance, higher load capacity (10Mpa), and allow operation under very thin film thickness. They have higher fatigue strength and excellent electrical insulation performance. This type of bearing is not only suitable for oil lubrication conditions, but also for conditions lubricated with other low-viscosity fluids, such as water. The thermal conductivity of Babbitt alloy is 63W / mK, and the thermal conductivity of PEEK is 0.25W / mK. Because polymer materials form an insulation layer on the bearing surface, traditional temperature measurement methods cannot accurately reflect the operating temperature of the bearing. Important occasions require the measurement of instantaneous temperature, and a more accurate measurement method is required. The method of directly measuring the oil temperature can accurately reflect the operating status of the bearing. Therefore, it is urgent to design a polymer thrust bearing that can directly measure the oil temperature. Summary of the invention

[0003] In view of the above problems existing in the prior art, the purpose of the present invention is to obtain a polymer thrust bearing with accurate real-time temperature measurement based on a thrust bearing made of polymer material.

[0004] In order to achieve one of the above-mentioned purposes of the invention, the technical solution of the polymer thrust bearing adopted by the present invention is as follows:

[0005] A polymer thrust bearing, comprising at least one third thrust pad and a temperature measuring element, wherein the third thrust pad has an oil hole and a mounting hole, wherein: the oil hole is a blind hole opened perpendicular to the pad surface of the third thrust pad, the mounting hole is parallel to the pad surface of the third thrust pad and vertically connected to the oil hole, the temperature measuring element is installed in the mounting hole, and the lubricating oil flows through the temperature measuring element when flowing in the oil hole. That is to say, at the gap between the adjacent third thrust pads of the thrust pad, the mounting hole opens to the outer circle of the thrust pad, which is convenient for installing the temperature measuring element for temperature measurement.

[0006] The thrust pads have the same structure, both of which consist of a pad surface, a pad back, an outer circle, an inner circle and two side surfaces. The temperature measuring element is arranged in the mounting hole and connected to the oil hole. It is installed at the third thrust pad temperature measuring point of the polymer thrust sliding bearing through the mounting hole of the thermostatic element. When the bearing is running, a dynamic pressure oil film is generated in the gap between the third thrust pad and the thrust plate. Its pressure is greater than the pressure in the bearing chamber. The lubricating oil flows into the oil hole from the oil film gap and flows out from the oil outlet hole through the guide channel. When the lubricating oil flows through the oil hole perpendicular to the PEEK material pad surface, it directly contacts the temperature measuring element installed on the third thrust pad, so that the temperature measuring element can directly detect the oil temperature of the lubricating oil. In other words, the temperature measuring element can obtain the working condition of the bearing more directly and accurately by detecting the oil temperature, and the temperature measuring element can realize real-time monitoring of the bearing temperature by real-time feedback data.

[0007] The mounting hole can also be used to install other parts required for the bearing. The purpose and specific shape of the mounting hole are preferred embodiments of the present invention and should not be used as a limitation to the present invention.

[0008] Preferably, the depth of the mounting hole is greater than the length of the temperature measuring element.

[0009] Preferably, the third thrust washer further comprises an oil outlet hole, the oil outlet hole is opened on one side of the third thrust washer and communicated with the end of the oil through hole, the oil outlet hole and the oil through hole are perpendicular on the same arc surface of the thrust washer, the oil outlet hole opens on the side of the thrust washer, the mounting hole communicates with the non-end of the oil through hole, and the mounting hole and the oil through hole are perpendicular along the radial direction of the bearing body. In other words, the mounting hole, the oil through hole and the oil outlet hole are perpendicular to each other, the mounting hole is connected to the non-end of the oil through hole, and the mounting hole and the oil outlet hole are not connected.

[0010] Preferably, the end of the oil hole, that is, one end of the oil hole inside the thrust bearing is located at the intersection of 1 / 4 (Rr) from the third thrust bearing circle and 1 / 4L from the tail of the third thrust bearing, where R is the outer radius of the thrust bearing, r is the inner radius of the thrust bearing, and L is the arc length of the circle that is 1 / 4 (Rr) from the third thrust bearing circle.

[0011] Preferably, the mounting hole is a through hole with a thread, the end of the mounting hole is connected to the non-end of the oil hole, and the non-end is close to the connection between the oil hole and the oil outlet hole, that is, the mounting hole is close to the oil outlet hole but not connected.

[0012] Preferably, the temperature measuring element has a threaded sleeve, and the temperature measuring element is installed in the installation hole through a threaded connection.

[0013] Preferably, the oil outlet hole is a through hole with threads, and a side of the oil outlet hole close to the oil through hole is an oil guide channel, and the oil outlet hole is connected to the oil through hole through the oil guide channel.

[0014] Preferably, the polymer thrust bearing further comprises a throttle tube having an external thread, and the throttle tube is installed in the oil outlet hole via the external thread connection.

[0015] More preferably, the inner radial cross section of the throttling tube is hexagonal. In other words, the interior of the throttling tube is an inner hexagonal structure.

[0016] More preferably, a throttle hole is provided at the end of the throttle tube, and the diameter of the throttle hole is smaller than that of the throttle tube. In other words, the throttle hole is provided at the opening of the oil outlet, and the reduced throttle tube plays a role in increasing the oil pressure and reducing the outflow of lubricating oil. The throttle tube can maintain the pressure of the lubricating oil film at the oil hole tile surface while ensuring that there is enough lubricating oil flowing in to contact the temperature measuring element, thereby reducing the influence of the opening on the bearing performance.

[0017] Preferably, the polymer thrust bearing further comprises a first thrust pad, and the first thrust pad is a common polymer thrust pad.

[0018] Preferably, the polymer thrust bearing also includes a second thrust pad having a temperature measuring element. The second thrust pad has a temperature measuring element installed under the polymer material layer. The temperature measuring element is used to measure the pad back temperature. The temperature measurement method is a traditional temperature measurement method, and the measurement result is the same as the existing thrust pad temperature data source.

[0019] The temperature measuring element is a temperature detection element commonly used in the prior art. For details, please refer to the prior art. The specific model and use method of the temperature measuring element are not limited here.

[0020] The first thrust pad is the main thrust pad of the polymer thrust bearing. The polymer thrust pad includes at least one second thrust pad and at least one third thrust pad. The three thrust pads are randomly distributed on the outside of the bearing body.

[0021] The present invention combines direct oil temperature monitoring with the traditional bearing back temperature detection method, which can not only provide more accurate real-time detection data, but also can be compared with existing experimental data generally accepted by users, so as to more accurately judge the bearing operation condition.

[0022] More preferably, the pad backs of the first thrust pad, the second thrust pad and the third thrust pad, that is, the thrust pad contact surfaces contacting the bearing body, are covered with a PEEK polymer layer.

[0023] The coverage of the polymer layer and the selection of polymer materials can be adjusted according to existing technologies and actual needs, and will not be elaborated here.

[0024] Compared with the prior art, the present invention adopts a direct temperature measurement method for polymer thrust bearings, so that the temperature sensor contacts the lubricating oil in the oil film of the sliding bearing, and can directly measure the lubricating oil temperature of the polymer material sliding bearing. When the bearing operation deteriorates, the lubricating oil temperature change is reflected in real time, providing users with instantaneous bearing operation status monitoring, thereby protecting the thrust sliding bearing; in the present invention, by adjusting the size of the throttling sleeve orifice, the flow rate of lubricating oil leaking from the oil film can be controlled, and the oil film pressure at the opening position can be maintained, thereby reducing the impact of the through hole on the bearing performance. The combination of direct temperature measurement and traditional temperature measurement methods can not only accurately monitor the bearing temperature and working status in real time, but also evaluate and compare the bearing operation status in combination with existing parameters, and more comprehensively judge the working and operating status of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the polymer thrust bearing provided by the present invention;

[0026] Figure 2 It is a schematic structural diagram of the third thrust pad of the polymer thrust bearing provided by the present invention.

[0027] Figure 3 It is a cross-sectional view along the AA direction of the third thrust pad of the polymer thrust bearing provided by the present invention.

[0028] Figure 4 It is a BB direction cross-sectional view of the third thrust pad of the polymer thrust bearing provided by the present invention.

[0029] Figure 5 It is a structural schematic diagram of a third thrust shoe with a temperature measuring element of a polymer thrust bearing provided by the present invention.

[0030] Figure 6 It is a cross-sectional view along the AA direction of the third thrust shoe with a temperature measuring element of the polymer thrust bearing provided by the present invention.

[0031] Figure 7 It is a BB direction cross-sectional view of the third thrust shoe with a temperature measuring element of the polymer thrust bearing provided by the present invention.

[0032] Figure 8 It is a structural schematic diagram of the polymer thrust bearing throttling tube provided by the present invention.

[0033] Fig. 9 It is a cross-sectional view along the AA direction of the polymer thrust bearing throttling tube provided by the present invention.

[0034] Reference numerals

[0035] 1 first thrust washer; 2 second thrust washer; 3 third thrust washer; 31 oil through hole; 32 oil outlet hole; 33 flow guide channel; 34 temperature measuring element mounting hole; 4 temperature measuring element; 5 flow guide tube; 51 external thread; 6 PEEK polymer layer. DETAILED DESCRIPTION

[0036] The polymer thrust bearing provided by the present invention is further described in detail and completely in conjunction with the embodiments below. The embodiments described below are exemplary and are only used to explain the present invention, and should not be understood as limiting the present invention.

[0037] like Figures 1 to 7 The polymer thrust bearing has three structures of thrust pads. The first is a first thrust pad 1 of ordinary structure, the second is a second thrust pad 2 with a temperature measuring element 4, and the third is a third thrust pad 3 with an oil hole 31, an oil outlet hole 32, a guide channel 33 and a temperature measuring element mounting hole 34. The thrust pads of the three structures are wrapped with a PEEK polymer layer 6 on one side close to the bearing body. Each set of thrust bearings has at least one second thrust pad and at least one third thrust pad. Each thrust pad consists of a pad surface, a pad back, two side surfaces, an outer circle, and a tail (inner circle).

[0038] like Figure 1 The second thrust pad 2 of the polymer thrust bearing in the present invention is shown to have a temperature measuring element 4 installed under the PEEK polymer material layer. The temperature measuring element 4 is used to measure the pad back temperature. The temperature measuring method is a traditional temperature measuring method, and the measurement result is the same as the existing thrust pad temperature data source.

[0039] like Figures 2 to 4 As shown, a blind hole is vertically drilled along the PEEK polymer adhesive layer 6 of the third thrust pad 3 along the pad, and this vertical blind hole passes through the polymer layer and is drilled into the thrust pad steel billet, and is connected to a transverse hole. The blind hole is an oil hole 31, and the transverse hole is an oil outlet hole 32. The oil hole 31 is located at the intersection of 1 / 4 (Rr) of the third thrust pad circle and 1 / 4L of the third thrust pad tail, where R is the outer radius of the thrust pad, r is the inner radius of the thrust pad, and L is the arc length of the circle 1 / 4 (Rr) of the third thrust pad circle. The diameter of the oil hole 31 is small, and it is vertically connected to the transverse oil outlet hole 32 downward. The oil hole 31 and the oil outlet hole 32 are perpendicular to each other and are located on the same arc surface of the thrust pad. The oil hole 31 and the temperature measuring element mounting hole 34 are perpendicular to each other along the radial direction of the bearing body, and the oil hole 31, the oil outlet hole 32 and the temperature measuring element mounting hole 34 are combined at 90°. The depth of the mounting hole 34 is greater than the length of the temperature measuring element 4 . Therefore, after the temperature measuring element 4 is installed in the mounting hole 34 , a lubricating oil passage is still left between the mounting hole 34 and the oil through hole 31 .

[0040] The oil outlet hole 32 is a threaded hole, and the position of the oil outlet hole 32 is set on the side of the thrust washer. The bearing lubricating oil enters the thrust washer from the oil hole 31, flows through the guide channel 33, and is then discharged from the thrust washer through the oil outlet hole 32. The oil inlet hole 31 and the oil outlet hole 32 are vertical. A through hole is opened on the outer circle of the thrust washer to communicate with the oil through hole 31. The through hole is a mounting hole 34 for mounting the temperature measuring element 4.

[0041] The temperature measuring element 4 has a threaded sleeve and is installed at the temperature measuring point of the third thrust pad of the polymer thrust sliding bearing through the installation hole 34 of the thermostatic element. When the bearing is running, a dynamic pressure oil film is generated in the gap between the third thrust pad and the thrust plate, and its pressure is greater than the pressure in the bearing chamber. The lubricating oil flows into the oil hole 31 from the oil film gap and flows out from the oil outlet hole 32 through the guide channel 33. When the lubricating oil flows through the oil hole 31 perpendicular to the PEEK material pad surface, it directly contacts the temperature measuring element 4 installed on the third thrust pad 3, so that the temperature measuring element 4 can directly detect the oil temperature of the lubricating oil.

[0042] On one side of the oil outlet 32, a throttle tube 5 is installed along the thread of the oil outlet 32. The throttle tube 5 is installed in the guide channel of the thrust washer for guiding the lubricating oil. At the same time, the guide channel is also used to detect the oil temperature of the lubricating oil. Figures 8-9 As shown, one end of the throttle tube 5 has a throttle hole, and the diameter of the throttle hole is smaller than the diameter of the other end of the throttle tube. The interior of the throttle tube 5 is an internal hexagonal structure, and the exterior has an external thread. The external thread is used to match the thread of the oil outlet hole and then tighten the throttle tube 5. The throttle hole of the throttle tube 5 can ensure that there is enough lubricating oil flowing in to contact the temperature measuring element, while maintaining the pressure of the lubricating oil film at the oil hole tile surface, thereby reducing the impact of the opening on the bearing performance.

[0043] Finally, it is necessary to explain here that the above embodiments are only used to further illustrate the technical solution of the present invention in detail and cannot be understood as limiting the scope of protection of the present invention. Some non-essential improvements and adjustments made by technicians in this field based on the above content of the present invention all fall within the scope of protection of the present invention.

Claims

1. A polymer thrust bearing, characterized in that: The polymer thrust bearing comprises at least one third thrust pad (3) and a temperature measuring element (4); the third thrust pad (3) has an oil hole (31) and a mounting hole (34); wherein: the oil hole (31) is a blind hole opened perpendicularly to the pad surface of the third thrust pad (3); the mounting hole (34) is parallel to the pad surface of the third thrust pad (3) and is vertically connected to the oil hole (31); the temperature measuring element (4) is installed in the mounting hole (34); when the lubricating oil flows in the oil hole (31), it flows through the temperature measuring element (4); the third thrust pad (3) also comprises an oil outlet hole (32); the oil outlet hole (32) is opened on one side of the third thrust pad (3) and The oil outlet hole (32) is connected to the end of the oil through hole (31), the oil outlet hole (32) and the oil through hole (31) are perpendicular to each other on the same arc surface of the thrust washer, the oil outlet hole (32) opens to the side surface of the thrust washer, the mounting hole (34) is connected to the non-end portion of the oil through hole (31), and the mounting hole (34) and the oil through hole (31) are perpendicular to each other along the radial direction of the bearing body; the end of the oil through hole (31) is located at the intersection of 1 / 4 (Rr) of the circle of the third thrust washer (3) and 1 / 4L of the tail of the third thrust washer (3), wherein R is the outer circle radius of the third thrust washer (3), r is the inner circle radius of the third thrust washer (3), and L is the arc length of a circle 1 / 4 (Rr) of the circle of the third thrust washer (3).

2. The polymer thrust bearing according to claim 1, characterized in that: The depth of the mounting hole (34) is greater than the length of the temperature measuring element (4).

3. The polymer thrust bearing according to claim 1, characterized in that: The mounting hole (34) is a through hole with threads.

4. The polymer thrust bearing according to claim 1, characterized in that: The temperature measuring element (4) is provided with a threaded sleeve, and the temperature measuring element (4) is installed in the installation hole (34) through a threaded connection.

5. The polymer thrust bearing according to claim 1, characterized in that: The oil outlet hole (32) is a through hole with threads, and a side of the oil outlet hole (32) close to the through hole is an oil guide channel (33). The oil outlet hole (32) is connected to the oil through hole (31) through the oil guide channel (33).

6. The polymer thrust bearing according to claim 1, characterized in that: The polymer thrust bearing also includes a throttle tube (5), the throttle tube has an external thread (51), and the throttle tube (5) is connected and installed in the oil outlet hole (32) through the external thread (51).

7. The polymer thrust bearing according to claim 6, characterized in that: The inner radial cross section of the throttling tube (5) is hexagonal.

8. The polymer thrust bearing according to claim 6, characterized in that: A throttling hole is arranged at the end of the throttling tube (5), and the diameter of the throttling hole is smaller than that of the throttling tube.

9. The polymer thrust bearing according to claim 1, characterized in that: The polymer thrust bearing further comprises a second thrust pad (2), the outer circumference of the second thrust pad (2) is provided with a temperature measuring element (4), and the temperature measuring element (4) is arranged along the radial direction of the bearing body.

10. The polymer thrust bearing according to claim 9, characterized in that: The polymer thrust bearing comprises at least one third thrust pad (3) and at least one second thrust pad (2).

Images