Pumping ring, self-lubricating bearing structure and pumping device

Abstract

This invention provides a pumping ring, a self-lubricating bearing structure, and a pumping device. The pumping ring includes a pumping ring portion for sleeved on the outside of a thrust disc, and a first side ring portion and a second side ring portion disposed opposite each other at both ends of the pumping ring portion. The pumping ring portion has a pumping flow channel on its inner circumferential surface facing the thrust disc, forming a structure that gradually converges and then gradually expands from bottom to top. The lower part of the first side ring portion has a first through hole for connecting to the pumping flow channel, allowing lubricating fluid to enter the pumping device. The upper part of the first side ring portion has a first overflow port. A pressure chamber is formed on the outer circumferential side of the upper part of the pumping ring portion, and the first overflow port connects to the pressure chamber, allowing lubricating fluid to be discharged from the pumping device. This invention achieves a pumping effect through the pumping flow channel, thereby realizing self-circulating lubrication and cooling within the bearing housing without external power, eliminating the need for an external forced lubrication system, and enabling the thrust disc and radial bearing to obtain stable and sufficient lubrication and cooling.

Description

Technical Field

[0001] This invention relates to the field of bearing lubrication technology, and in particular to a pumping ring, a self-lubricating bearing structure, and a pump device. Background Technology

[0002] For pumps with high flow rates and low head, under high energy density conditions, such as energy density greater than 4 × 10⁻⁶, 6 At speeds of kW / min, the radial and thrust bearings of pumps must withstand extremely high loads and speeds, generating a significant amount of frictional heat. To ensure reliable operation of the bearing structure, existing pump equipment typically uses an external forced lubrication system for the bearing housing. This system uses an oil pump to pressurize and deliver lubricating oil to the bearing area, allowing the oil to carry away heat for lubrication and cooling. However, some application sites lack the installation conditions for an external forced lubrication system, making forced lubrication and cooling impossible. Therefore, how to achieve self-circulation of lubricating fluid within the bearing housing structure to meet the lubrication and cooling requirements of the bearing structure has become a pressing technical problem that needs to be solved. Summary of the Invention

[0003] To overcome the aforementioned deficiencies of the prior art, embodiments of the present invention provide a pumping ring, a self-lubricating bearing structure, and a pump device for realizing the self-circulation of lubricating fluid to meet the lubrication and cooling requirements of the bearing structure.

[0004] The above-mentioned objective of the present invention can be achieved by the following technical solution: The present invention provides a pumping ring for use in a pumping device. The pumping ring includes a pumping ring portion for sleeved on the outside of the thrust disk of the pumping device, and a first side ring portion and a second side ring portion disposed opposite to each other at their axial ends. The pumping ring portion has a pumping flow channel on its inner circumferential surface facing the thrust disk. The pumping flow channel forms a structure that gradually converges and then gradually expands from bottom to top. The lower part of the first side ring portion has a first through hole for connecting the pumping flow channel. The first through hole is used for the entry of lubricating fluid in the pumping device. The upper part of the first side ring portion has a first overflow port that penetrates the first side ring portion along the axial direction of the thrust disk. A pressure chamber is formed on the outer circumferential side of the upper part of the pumping ring portion. The first overflow port is connected to the pressure chamber. The pressure chamber is used for the discharge of lubricating fluid in the pumping device.

[0005] In a preferred embodiment of the present invention, a flow-blocking portion is provided on the outer peripheral surface of the pump ring portion, which extends circumferentially and protrudes radially. The flow-blocking portion is spaced apart from the first flow port in the axial direction of the pump ring portion and faces the first flow port.

[0006] In a preferred embodiment of the present invention, the upper part of the second side ring is provided with a second flow port that passes through the second side ring along the axial direction of the thrust disk, and the first flow port and the second flow port are respectively disposed on both sides of the flow-blocking part along the axial direction.

[0007] In a preferred embodiment of the present invention, the outer peripheral surface of the pump ring is further provided with a first protrusion and a second protrusion that are radially protruding, and the first protrusion and the second protrusion are located on both sides of the pressure chamber in the circumferential direction of the pump ring.

[0008] In a preferred embodiment of the present invention, a first oil reservoir and a second oil reservoir are provided on the inner circumferential surface of the pump ring. The first oil reservoir protrudes toward the outer circumferential side to form the first protrusion, and the second oil reservoir protrudes toward the outer circumferential side to form the second protrusion.

[0009] In a preferred embodiment of the present invention, the pumping channel is streamlined.

[0010] In a preferred embodiment of the present invention, a second through hole is further provided at the lower part of the first side ring portion. The first through hole and the second through hole are respectively connected to the two ends of the pumping flow channel. The first through hole and the second through hole are both used for the entry and exit of the lubricating fluid, and are configured such that one of the first through hole and the second through hole is used for the entry of the lubricating fluid and the other is used for the exit of the lubricating fluid.

[0011] In a preferred embodiment of the present invention, the lower part of the pump ring is provided with a first flow groove and a second flow groove recessed toward the outer periphery. The first flow groove and the second flow groove are separated in the circumferential direction by a third protrusion. The first flow groove connects the first through hole to one end of the pumping channel, and the second flow groove connects the second through hole to the other end of the pumping channel.

[0012] In a preferred embodiment of the present invention, the lower part of the second side ring is provided with a third through hole and a fourth through hole, the third through hole and the fourth through hole being opposite to the first through hole and the second through hole, respectively. The third through hole is connected to the first flow groove, and the fourth through hole is connected to the second flow groove.

[0013] The present invention also provides a self-lubricating bearing structure, including a thrust disk and the aforementioned pumping ring, wherein the pumping ring is rotatably sleeved on the outside of the thrust disk, and the thrust disk has a plurality of pumping grooves spaced around its outer peripheral surface facing the pumping ring.

[0014] In a preferred embodiment of the present invention, the self-lubricating bearing structure further includes a bearing housing, a pump shaft rotatably disposed within the bearing housing, and a radial bearing disposed on the pump shaft; the bearing housing has a bearing chamber and a liquid storage chamber inside; the pumping ring and the thrust disk are both disposed within the bearing chamber; the thrust disk is disposed on the pump shaft and spaced apart from the radial bearing; the liquid storage chamber communicates with the first through hole of the pumping ring, and a return channel is provided between the liquid storage chamber and the pressure chamber of the pumping ring.

[0015] In a preferred embodiment of the present invention, the self-lubricating bearing structure further includes an oil return component disposed within the bearing housing; the oil return component is disposed at the inlet of the return channel and fixed relative to the bearing housing; the oil return component passes through the first flow port and communicates with the pressure chamber, and the oil return component is configured to limit the rotation range of the pumping ring by abutting against the two side walls of the first flow port.

[0016] In a preferred embodiment of the present invention, the pumping ring includes a first through hole and a second through hole. The pumping ring has a forward circulation position and a reverse circulation position that can be switched by the rotation direction of the thrust disc. When the pumping ring is in the forward circulation position, one of the two sidewalls of the first flow port is used to abut against the oil return component to limit the flow, so that the first through hole is used for the entry of lubricating fluid in the pumping device and the second through hole is used for the discharge of lubricating fluid in the pumping device. When the pumping ring is in the reverse circulation position, the other sidewall of the first flow port is used to abut against the oil return component to limit the flow, so that the first through hole is used for the discharge of lubricating fluid in the pumping device and the second through hole is used for the entry of lubricating fluid in the pumping device.

[0017] In a preferred embodiment of the present invention, the bearing housing further includes a first oil suction pipe and a second oil suction pipe arranged at intervals and connected to the liquid storage chamber, and an oil return port disposed between the first oil suction pipe and the second oil suction pipe and connected to the liquid storage chamber. When the pumping ring is in the positive circulation position, the first through hole and the second through hole of the pumping ring are respectively connected to the first oil suction pipe and the oil return port; When the pumping ring is in the reverse circulation position, the first through hole and the second through hole of the pumping ring are respectively connected to the oil return port and the second oil suction pipe.

[0018] In a preferred embodiment of the present invention, the bearing housing further includes a cooling chamber communicating with the liquid storage chamber, the cooling chamber being provided with a cooler for cooling the lubricating fluid in the liquid storage chamber, and the oil return port being connected to the cooling chamber.

[0019] In a preferred embodiment of the present invention, the cooler includes, but is not limited to, one of a tube bundle cooler, a coil cooler, and a finned cooler.

[0020] In a preferred embodiment of the present invention, the self-lubricating bearing structure further includes a return pipe for connecting the liquid storage chamber, the return channel connecting the return pipe and the pressure chamber, and the oil return component being inserted at the inlet of the return channel.

[0021] In a preferred embodiment of the present invention, the bearing housing includes a support portion arranged around the radial bearing, the return pipeline and the pumping ring are arranged opposite to each other on both sides of the support portion, and the return channel passes through the support portion along the axial direction of the pump shaft.

[0022] In a preferred embodiment of the present invention, the oil return component is a positioning pin, the positioning pin is provided with an oil return through hole penetrating the positioning pin, and the positioning pin is threadedly connected to the return channel.

[0023] In a preferred embodiment of the present invention, the bearing housing is further provided with at least one observation hole extending from the outside to the return channel, and the observation hole is provided with a matching plug.

[0024] In a preferred embodiment of the present invention, the self-lubricating bearing structure further includes two tilting pads sleeved on the pump shaft and positioned on both axial sides of the thrust disc.

[0025] The present invention also provides a pump device including the aforementioned self-lubricating bearing structure.

[0026] The technical solution of the present invention has the following significant beneficial effects: When the pumping ring described in this invention is used, it is fitted around the thrust plate. Because the pumping channel forms a structure that gradually converges and then expands from bottom to top, the lubricant's velocity initially increases and then decreases under the influence of the Venturi effect during upward flow. The initial increase in velocity enhances the lubricant's kinetic energy, enabling it to overcome gravity and be transported upwards. Subsequently, the velocity decreases, converting kinetic energy into pressure energy, thus increasing pressure and producing a significant booster pumping effect. This allows some lubricant to overcome resistance and be transported upwards to the pressure chamber, returning to the storage chamber via the return channel, forming a self-circulating loop. Simultaneously, most of the lubricant flows evenly along the circumference from the gap between the pump ring and the thrust plate during pumping, flowing downwards under gravity to fully cover the surface of the thrust plate and the tilting pads on both sides, achieving thorough lubrication and cooling. This invention requires no external power input throughout the entire circulation process, allowing the lubricating fluid to fully cover the thrust disc and tilting pads through self-circulation, ensuring stable and sufficient lubrication and cooling for components such as the thrust disc, tilting pads, and radial bearings. This invention is particularly suitable for field conditions where an external forced lubrication system cannot be installed, better meeting the lubrication and cooling needs of the bearing structure within the bearing housing, and significantly improving the independent operation capability and environmental adaptability of the pump equipment. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of the invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. Those skilled in the art, guided by the teachings of this invention, can select various possible shapes and proportions to implement the invention according to specific circumstances.

[0029] Figure 1 This is a schematic cross-sectional view of a pumping ring taken along the axial direction according to an embodiment of the present invention; Figure 2 for Figure 1 Schematic diagram of section AA; Figure 3 for Figure 1 Schematic diagram of the BB section; Figure 4 This is a top view schematic diagram of an embodiment of the pumping ring described in this invention; Figure 5 This is a three-dimensional schematic diagram of one embodiment of the pumping ring described in this invention; Figure 6 This is a partial sectional side view of one embodiment of the self-lubricating bearing structure described in this invention; Figure 7 This is a side sectional view of one embodiment of the self-lubricating bearing structure described in this invention; Figure 8 This is a front sectional view of one embodiment of the self-lubricating bearing structure described in this invention; Figure 9 This is a cross-sectional structural diagram of one embodiment of the liquid storage chamber described in this invention; Figure 10 This is a schematic diagram showing the positions of the first and second through holes when the pumping ring is in the positive circulation position according to the present invention; Figure 11 This is a schematic diagram showing the position of the first and second through holes when the pumping ring of the present invention is in the reverse circulation position.

[0030] The reference numerals in the above figures are as follows: 10. Pressure chamber; 100. Pumping ring; 110. Pump ring; 111. Pumping channel; 112. First protrusion; 113. Second protrusion; 114. First oil reservoir; 115. Second oil reservoir; 120. First side ring portion; 121. First through hole; 122. Second through hole; 123. First flow outlet; 130. Second side ring; 131. Second flow port; 132. Third through hole; 133. Fourth through hole; 140. Baffle section; 150. Third protrusion; 151. First flow channel; 152. Second flow channel; 200. Thrust disc; 210. Pumping tank; 300. Oil return components; 400, Bearing housing; 401, Bearing chamber; 410, Liquid reservoir; 411, Connecting hole; 420, Cooling chamber; 421, Cooler; 430, First oil suction pipe; 440, Second oil suction pipe; 450, Oil return port; 460, Return channel; 470, Support; 480, Observation hole; 490, Plug; 500. Pump shaft; 600, Radial bearing; 700. Return piping; 800, adapter; 900. Tilting tiles. Detailed Implementation

[0031] 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.

[0032] Implementation Method 1

[0033] Please refer to the following: Figures 1 to 11 As shown, an embodiment of the present invention provides a pumping ring 100 for use in a pumping device. The pumping ring 100 includes a pumping ring portion 110 for sleeved on the outside of a thrust disk 200 of the pumping device, and a first side ring portion 120 and a second side ring portion 130 disposed opposite to each other at the axial ends of the pumping ring portion 110. The pumping ring portion 110 has a pumping flow channel 111 on its inner circumferential surface facing the thrust disk 200. The pumping flow channel 111 forms a structure that gradually converges and then gradually expands from bottom to top. The lower part of the first side ring portion 120 has a first through hole 121 for connecting the pumping flow channel 111. The first through hole 121 is used for the entry of lubricating fluid in the pumping device. The upper part of the first side ring portion 120 has a first overflow port 123 that penetrates the first side ring portion 120 along the axial direction of the thrust disk 200. The outer circumferential side of the upper part of the pumping ring portion 110 forms a pressure chamber 10. The first overflow port 123 connects to the pressure chamber 10. The pressure chamber 10 is used for the discharge of lubricating fluid in the pumping device.

[0034] Overall, when the pumping ring 100 is used, it is fitted around the thrust plate 200. Because the pumping channel 111 has a structure that gradually converges and then expands from bottom to top, the lubricating fluid's velocity initially increases and then decreases under the influence of the Venturi effect during upward flow. The initial increase in velocity enhances the kinetic energy of the lubricating fluid, enabling it to overcome gravity and be transported upwards. Subsequently, the velocity decreases, converting kinetic energy into pressure energy, thus increasing pressure and producing a significant booster pumping effect. This allows some of the lubricating fluid to overcome resistance and be transported upwards to the pressure chamber 10, returning to the storage chamber via the return channel 460, forming a self-circulating loop. Simultaneously, most of the lubricating fluid flows evenly along the circumference from the gap between the pump ring 110 and the thrust plate 200 during pumping, flowing downwards under gravity to fully cover the surface of the thrust plate 200 and the tilting pads 900 on both sides, achieving thorough lubrication and cooling.

[0035] This invention allows lubricating fluid to circulate and fully cover the thrust disc 200 and tilting pads 900 without any external power input throughout the entire circulation process, ensuring stable and sufficient lubrication and cooling for components such as the thrust disc 200, tilting pads 900, and radial bearings 600. This invention is particularly suitable for field conditions where an external forced lubrication system cannot be installed, better meeting the lubrication and cooling needs of the bearing structure within the bearing housing, and significantly improving the independent operation capability and environmental adaptability of the pump equipment.

[0036] In embodiments of the present invention, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 In the embodiment shown, a flow-blocking portion 140 is provided on the outer peripheral surface of the pump ring portion 110, which extends circumferentially and protrudes radially. The flow-blocking portion 140 is spaced apart from the first flow port 123 in the axial direction of the pump ring portion 110 and faces the first flow port 123.

[0037] Preferred, such as Figure 1 and Figure 5 In the embodiment shown, the side where the first flow port 123 is located is used to set the return channel 460, and the baffle 140 is set closer to the first flow port 123, so that the lubricating fluid entering the pressure chamber 10 through the first flow port 123 can flow into the return channel 460 quickly under the obstruction of the baffle 140.

[0038] In embodiments of the present invention, such as Figure 4 and Figure 5 In the embodiment shown, the upper part of the second side ring 130 is provided with a second flow port 131 that passes through the second side ring 130 along the axial direction of the thrust disk 200, and the first flow port 123 and the second flow port 131 are respectively provided on both sides of the flow blocking part 140.

[0039] When the thrust disk 200 rotates, the lubricating fluid is pumped along the pumping channel 111 and discharged to both sides through the gap between the pump ring 110 and the thrust disk 200. The lubricating fluid on the side where the first ring 120 is located can enter the pressure chamber 10 through the first overflow port 123, and the lubricating fluid on the side where the second ring 130 is located can enter the pressure chamber 10 through the second overflow port 131. The two streams of lubricating fluid can merge in the pressure chamber 10 and generate a stable self-circulation pressure in the pressure chamber 10. Under this pressure, the lubricating fluid in the pressure chamber 10 can flow back along the return channel 460 to generate self-circulation.

[0040] Furthermore, by setting the flow-blocking part 140, direct short-circuiting between the first flow port 123 and the second flow port 131 can be prevented, forcing most of the lubricating fluid entering the pressure chamber 10 to flow back through the return channel 460, ensuring the unidirectionality and stability of the self-circulation loop, and improving circulation efficiency and circulation reliability.

[0041] In embodiments of the present invention, designers may adjust the specific structure of the first flow port 123 and the second flow port 131 according to usage needs, without making specific limitations.

[0042] Preferably, the first flow port 123 is configured as a circumferentially extending strip-shaped or fan-shaped hole. In an expandable embodiment, such as Figure 5 In the embodiment shown, the outer edge of the first flow port 123 may be open, so that the return oil component 300 can extend into the first flow port 123 along the axial direction of the thrust plate 200 to circumferentially limit the pumping ring 100.

[0043] And, as Figure 5 In the illustrated embodiment, the second flow port 131 is configured as a circumferentially extending strip-shaped or fan-shaped hole and is disposed opposite to the first flow port 123 in the axial direction. In an extended embodiment, the outer edge of the second flow port 131 may be open.

[0044] In embodiments of the present invention, such as Figure 2 , Figure 3 and Figure 5 In the embodiment shown, the outer peripheral surface of the pump ring portion 110 is also provided with a radially protruding first protrusion 112 and a second protrusion 113, which are located on both sides of the pressure chamber 10 in the circumferential direction of the pump ring portion 110.

[0045] The first protrusion 112 and the second protrusion 113 can define the range of the pressure chamber 10 in the circumferential direction, and the first protrusion 112 and the second protrusion 113 can limit the flow area on the outer periphery of the pump ring 110, which helps to maintain the pressure in the pressure chamber 10, so that most of the lubricating fluid entering the pressure chamber 10 can flow back through the return channel 460 instead of flowing out from the circumferential sides of the pressure chamber 10, thereby ensuring the stability of self-circulation and pumping efficiency.

[0046] In an expandable embodiment, such as Figure 2 and Figure 3 In the embodiment shown, a first oil reservoir 114 and a second oil reservoir 115 are provided on the inner peripheral surface of the pump ring 110. The first oil reservoir 114 protrudes towards the outer peripheral side to form a first protrusion 112, and the second oil reservoir 115 protrudes towards the outer peripheral side to form a second protrusion 113.

[0047] By setting the first oil storage tank 114 and the second oil storage tank 115, a locally enlarged oil storage space can be formed in the middle of the pumping channel 111, which plays a buffering and pressure stabilizing role for the lubricating fluid entering and exiting the pumping channel 111, reducing the pressure pulsation caused by the relative movement between the thrust plate 200 pumping tank 210 and the pumping channel 111, and making the flow more stable.

[0048] Meanwhile, the first oil reservoir 114 and the second oil reservoir 115 can also store a certain amount of lubricating fluid, which can supplement the oil supply when the pumping ring 100 rotates unevenly or fluctuates in speed, thereby improving the continuity and stability of the oil supply.

[0049] In embodiments of the present invention, such as Figure 1 In the illustrated embodiment, the pumping channel 111 is streamlined. By designing the pumping channel 111 in a streamlined shape, flow resistance is reduced, and pumping efficiency is improved. Furthermore, the streamlined pumping channel 111 can create a stable pressure gradient within itself, enhancing the booster pumping effect. Designers can adjust the specific shape of the pumping channel 111 according to usage requirements; no specific limitations are imposed here.

[0050] In embodiments of the present invention, such as Figure 5 In the embodiment shown, the lower part of the first side ring portion 120 is also provided with a second through hole 122. The first through hole 121 and the second through hole 122 are respectively connected to the two ends of the pumping flow channel 111. The first through hole 121 and the second through hole 122 are both used for the entry and exit of lubricating fluid, and are configured such that one of the first through hole 121 and the second through hole 122 is used for the entry of lubricating fluid and the other is used for the exit of lubricating fluid.

[0051] Specifically, such as Figure 7 , Figure 10 and Figure 11 In the illustrated embodiment, the first through hole 121 and the second through hole 122 are arranged at intervals along the circumference. Furthermore, a first oil suction pipe 430, an oil return port 450, and a second oil suction pipe 440 are also provided to cooperate with the first through hole 121 and the second through hole 122. The first oil suction pipe 430, the oil return port 450, and the second oil suction pipe 440 are arranged at intervals, and the interval between each pair is approximately the same as the interval between the first through hole 121 and the second through hole 122.

[0052] When the thrust disc 200 rotates, the pumping ring 100 can rotate circumferentially under the influence of the viscous shear force of the lubricating fluid. When the thrust disc 200 rotates clockwise, as... Figure 10 In the embodiment shown, the pumping ring 100 is rotated clockwise to the positive circulation position, at which time the first through hole 121 can be aligned with the outlet of the first oil suction pipe 430 for the entry of lubricating fluid in the pump equipment, and the second through hole 122 is aligned with the oil return port 450 for the discharge of lubricating fluid in the pump equipment.

[0053] When the thrust disc 200 rotates counterclockwise, as Figure 11In the embodiment shown, the pumping ring 100 is rotated counterclockwise to the reverse circulation position, at which time the first through hole 121 can be aligned with the oil return port 450 for the discharge of lubricating fluid in the pump equipment, and the second through hole 122 is aligned with the outlet of the second suction pipe 440 for the entry of lubricating fluid in the pump equipment.

[0054] By setting the first through hole 121 and the second through hole 122, the first through hole 121 and the second through hole 122 can automatically switch the oil inlet and oil outlet directions according to the rotation direction of the thrust plate 200, realizing the automatic adjustment of the self-circulation direction, always maintaining the operating state of cold oil intake and hot oil return, ensuring the lubrication and cooling effect, and improving the adaptability of the pumping ring 100 to different operating conditions.

[0055] In embodiments of the present invention, such as Figure 2 and Figure 3 In the embodiment shown, the lower part of the pump ring 110 is provided with a first flow groove 151 and a second flow groove 152 recessed towards the outer periphery. The first flow groove 151 and the second flow groove 152 are separated by a third protrusion 150 in the circumferential direction. The first flow groove 151 connects the first through hole 121 to one end of the pumping channel 111, and the second flow groove 152 connects the second through hole 122 to the other end of the pumping channel 111.

[0056] Specifically, the pumping channel 111 extends circumferentially at both ends and connects to the first flow channel 151 and the second flow channel 152, respectively. The first and second flow channels 151 and 152 can store a certain amount of lubricant and smoothly connect the first through hole 121 and the second through hole 122 to the pumping channel 111, optimizing the flow path of the lubricant, reducing flow resistance, and improving pumping efficiency.

[0057] In embodiments of the present invention, such as Figure 5 In the embodiment shown, the lower part of the second side ring portion 130 is provided with a third through hole 132 and a fourth through hole 133. The third through hole 132 and the fourth through hole 133 are respectively opposite to the first through hole 121 and the second through hole 122. The third through hole 132 is connected to the first flow groove 151, and the fourth through hole 133 is connected to the second flow groove 152.

[0058] By providing the third through hole 132 and the fourth through hole 133, the first flow groove 151 and the second flow groove 152 can be connected to the side where the second side ring 130 is located, forming an additional oil passage connection path. This allows the lubricant on the side where the second side ring 130 is located to be drawn in or discharged, promoting the flow of lubricant on the side where the second side ring 130 is located and improving the cooling and lubrication effect.

[0059] Implementation Method 2

[0060] Please refer to the following: Figure 6 , Figure 7 , Figure 8 and Figure 9 The embodiment shown in this invention provides a self-lubricating bearing structure, which includes a thrust disk 200 and a pumping ring 100 as described in Embodiment 1. The pumping ring 100 is rotatably sleeved on the outside of the thrust disk 200, and the thrust disk 200 has a plurality of pumping grooves 210 spaced around its outer peripheral surface facing the pumping ring 100. The specific structure and beneficial effects of the pumping ring 100 are the same as those described in Embodiment 1, and will not be repeated here.

[0061] By arranging multiple pumping grooves 210 at intervals on the outer circumferential surface of the thrust plate 200, the pumping grooves 210 can cooperate with the pumping channel 111 to generate a pumping effect, thereby pumping the lubricant from the lower part to the upper part of the pumping channel 111 without the need for an additional drive device, thus achieving a self-circulating drive function.

[0062] In an embodiment of the present invention, the self-lubricating bearing structure further includes a bearing housing 400, a pump shaft 500 rotatably disposed in the bearing housing 400, and a radial bearing 600 disposed on the pump shaft 500. The bearing housing 400 has a bearing chamber 401 and a liquid storage chamber 410 inside. The pumping ring 100 and the thrust disk 200 are both disposed in the bearing chamber 401. The thrust disk 200 is disposed on the pump shaft 500 and arranged at intervals with the radial bearing 600. The liquid storage chamber 410 is connected to the first through hole 121 of the pumping ring 100. A return channel 460 is provided between the liquid storage chamber 410 and the pressure chamber 10 of the pumping ring 100.

[0063] The thrust plate 200 and the pumping ring 100 can work together to produce a pumping effect. The lubricant can be pumped through the pumping channel 111 and squeezed out through the gap between the thrust plate 200 and the pumping ring 100, so that the lubricant in the bearing housing 400 generates a self-circulating flow, which can lubricate and cool the thrust plate 200 and the radial bearing 600 and other components.

[0064] Meanwhile, the pump shaft 500 passes through the radial bearing 600. When the pump shaft 500 rotates, a local oil film circulation can be generated between the pump shaft 500 and the radial bearing 600, so that cooling and lubrication can be achieved synchronously between the two using self-circulating lubricant.

[0065] Specifically, the reservoir 410 can be located at the lower part of the bearing housing 400, and the return channel 460 can return the lubricating fluid in the pressure chamber 10 to the reservoir 410, forming a self-circulating closed loop within the bearing housing 400, which includes oil suction, pumping and pressurization, lubrication and cooling, return, and re-suction. This invention eliminates the need for an external oil pump and external pipelines, achieving complete self-lubrication and cooling within the bearing housing 400, making it particularly suitable for sites where an external forced lubrication system cannot be installed.

[0066] In embodiments of the present invention, such as Figure 6 and Figure 7 In the embodiment shown, the self-lubricating bearing structure further includes an oil return component 300 disposed within the bearing housing 400. The oil return component 300 is located at the inlet of the return channel 460 and is fixed relative to the bearing housing 400. The oil return component 300 passes through the first flow port 123 and connects to the pressure chamber 10. The oil return component 300 is configured to limit the rotation range of the pumping ring 100 by abutting against the two side walls of the first flow port 123.

[0067] Specifically, the oil return component 300 is fixedly installed on the bearing housing 400, and at least a portion of the oil return component 300 can be axially inserted into the first flow port 123, thereby connecting the return channel 460 and the pressure chamber 10.

[0068] When the thrust disc 200 rotates, the pumping ring 100 can rotate circumferentially under the influence of the viscous shear force of the lubricating fluid. When the pumping ring 100 rotates to a preset angle, the side wall of the first flow port 123 can abut against the return oil component 300, thereby limiting the rotation range of the pumping ring 100.

[0069] In one feasible embodiment of the present invention, such as Figure 10 and Figure 11 In the embodiment shown, the pumping ring 100 includes a first through hole 121 and a second through hole 122, and the pumping ring 100 has a positive circulation position and a negative circulation position for switching by the rotation direction of the thrust disc 200. When the pumping ring 100 is in the positive circulation position, one of the two side walls of the first overflow port 123 is used to abut against the return oil component 300 to limit the flow so that the first through hole 121 is used for the entry of lubricating fluid in the pump equipment and the second through hole 122 is used for the discharge of lubricating fluid in the pump equipment. When the pumping ring 100 is in the reverse circulation position, the other side wall of the first overflow port 123 is used to abut against the return oil component 300 to limit the flow so that the first through hole 121 is used for the discharge of lubricating fluid in the pump equipment and the second through hole 122 is used for the entry of lubricating fluid in the pump equipment.

[0070] By setting up an oil return component 300 and inserting it into the first overflow port 123, the oil return component 300 not only serves as an oil return and conveyor but also as a circumferential limiting component, which helps to simplify the number of components inside the bearing housing 400 and reduce manufacturing costs.

[0071] In an embodiment of the present invention, the bearing housing 400 further includes a first oil suction pipe 430 and a second oil suction pipe 440 arranged at intervals and connected to the liquid storage chamber 410, and an oil return port 450 disposed between the first oil suction pipe 430 and the second oil suction pipe 440 and connected to the liquid storage chamber 410. When the pumping ring 100 is in the positive circulation position, the first through hole 121 and the second through hole 122 of the pumping ring 100 are respectively connected to the first oil suction pipe 430 and the oil return port 450. When the pumping ring 100 is in the reverse circulation position, the first through hole 121 and the second through hole 122 of the pumping ring 100 are respectively connected to the return oil port 450 and the second suction pipe 440.

[0072] Specifically, when the thrust disk 200 rotates clockwise, as Figure 10 In the embodiment shown, the pumping ring 100 is rotated clockwise to the positive circulation position. At this time, the first through hole 121 can be aligned with the inlet of the first oil suction pipe 430 for the entry of lubricating fluid in the pump equipment, and the second through hole 122 is aligned with the oil return port 450 for the discharge of lubricating fluid in the pump equipment.

[0073] When the thrust disc 200 rotates counterclockwise, as Figure 11 In the embodiment shown, the pumping ring 100 is rotated counterclockwise to the reverse circulation position. At this time, the first through hole 121 can be aligned with the oil return port 450 for the discharge of lubricating fluid in the pump equipment, and the second through hole 122 is aligned with the inlet of the second suction pipe 440 for the entry of lubricating fluid in the pump equipment.

[0074] By setting up a first oil suction pipe 430, an oil return port 450 and a second oil suction pipe 440 arranged at intervals, the oil suction and discharge requirements of the thrust disc 200 under both forward and reverse rotation conditions can be met. This ensures that regardless of whether the pumping ring 100 is in the forward or reverse circulation position, one of the first through hole 121 and the second through hole 122 is connected to the inlet of the oil suction pipe to draw in cold oil, and the other is connected to the oil return port 450 to discharge hot oil.

[0075] In embodiments of the present invention, such as Figure 7 , Figure 8 and Figure 9 In the embodiment shown, the bearing housing 400 also includes a cooling chamber 420 that communicates with the liquid storage chamber 410. The cooling chamber 420 is provided with a cooler 421, which is used to cool the lubricating fluid in the liquid storage chamber 410. The oil return port 450 is connected to the cooling chamber 420.

[0076] Specifically, the bearing housing 400 also includes an inner partition for separating the cooling chamber 420 and the liquid storage chamber 410 and for heat exchange, and the inner partition is provided with at least one connecting hole 411 for connecting the liquid storage chamber 410 and the cooling chamber 420.

[0077] The lubricating fluid returning through the oil return port 450 can directly enter the cooling chamber 420. After being cooled by the cooler 421, it flows into the reservoir 410 through the connecting hole 411. Then, the lubricating fluid can be drawn by the first oil suction pipe 430 or the second oil suction pipe 440 and transported to the bearing chamber 401 to lubricate the bearing structure.

[0078] Furthermore, the cooling chamber 420 extends axially along the pump shaft 500 and is located below the thrust plate 200. Additionally, the liquid reservoir 410 may be located to the side of the cooling chamber 420 and below the radial bearing 600. Furthermore, the bearing housing 400 is provided with a coolant inlet and a coolant outlet communicating with the cooling chamber 420.

[0079] Designers may adjust the specific type of cooler 421 according to usage requirements, without making specific restrictions here. For example, cooler 421 may include, but is not limited to, one of tube bundle coolers, coil coolers, and finned coolers.

[0080] In embodiments of the present invention, such as Figure 6 and Figure 9 In the embodiment shown, the self-lubricating bearing structure also includes a return pipe 700 for connecting the liquid storage chamber 410, a return channel 460 connecting the return pipe 700 and the pressure chamber 10, and an oil return component 300 inserted at the inlet of the return channel 460.

[0081] By setting up a return pipe 700 and connecting it to the return channel 460, the lubricating fluid in the pressure chamber 10 can be accurately guided to the reservoir 410 using the return pipe 700, thereby improving the return efficiency.

[0082] Specifically, one end of the return pipe 700 can be directly connected to the return channel 460. Or, as... Figure 6 In the embodiment shown, in order to facilitate the connection of the return pipe 700, an adapter 800 is also provided in the bearing housing 400, and the return pipe 700 is connected to the return channel 460 through the adapter 800.

[0083] In embodiments of the present invention, such as Figure 6 and Figure 7 In the embodiment shown, the bearing housing 400 includes a support portion 470 arranged around the radial bearing 600, a return pipe 700 and a pumping ring 100 arranged opposite each other on both sides of the support portion 470, and a return channel 460 passing through the support portion 470 along the axial direction of the pump shaft 500.

[0084] Specifically, the support part 470 is an annular boss structure arranged inside the bearing housing 400 around the radial bearing 600, and the return channel 460 passes through the support part 470 axially, and the return channel 460 is located on the radial outer side of the radial bearing 600.

[0085] By setting the support part 470, the installation stability of the radial bearing 600 can be improved. The return channel 460 can pass through the support part 470 along the axial direction of the pump shaft 500 and connect to the return pipe 700, thereby forming a flow path inside the bearing housing 400 without the need to add an additional flow structure.

[0086] Furthermore, the return pipe 700 and the pumping ring 100 are respectively located on both sides of the support part 470. The pumping ring 100 and the return pipe 700 are in different spaces, which avoids interference between the pumping ring 100 or the thrust plate 200 and the return pipe 700, and ensures that each component can operate stably.

[0087] In embodiments of the present invention, the designer may adjust the specific structure of the oil return component 300 according to usage requirements, and no specific limitations are imposed here. In one feasible embodiment, the oil return component 300 is a positioning pin, and the positioning pin is provided with an oil return through hole that passes through the positioning pin. The positioning pin is threadedly connected to the return channel 460.

[0088] Specifically, the outer wall of the locating pin is provided with external threads, and the end of the return channel 460 near the pumping ring 100 is provided with internal threads. The locating pin is threadedly connected in the return channel 460. By adopting a threaded connection, the locating pin is easy to install and remove, thus improving the efficiency of disassembly, assembly, and maintenance.

[0089] In embodiments of the present invention, such as Figure 6 In the embodiment shown, the bearing housing 400 is also provided with at least one observation hole 480 extending from the outside to the return channel 460, and the observation hole 480 is provided with a matching plug 490.

[0090] Specifically, the observation hole 480 extends along the height direction to the return channel 460, and a removable plug 490 is provided on the observation hole 480. During normal operation, the plug 490 can seal the observation hole 480 to ensure the oil circuit is sealed; when maintenance or inspection is required, the plug 490 can be removed, and the flow status of the lubricating fluid in the return channel 460 can be visually inspected through the observation hole 480 to determine in a timely manner whether the return is unobstructed.

[0091] Designers can adjust the number and arrangement of the observation holes 480 according to usage needs, and no specific restrictions are imposed here. In one feasible embodiment, multiple observation holes 480 are provided, such as two, three or other numbers, and the multiple observation holes 480 are arranged at intervals along the extension direction of the return channel 460.

[0092] By setting multiple observation holes 480, the oil flow can be observed from different positions. Furthermore, each observation hole 480 can be set with a different depth to facilitate timely acquisition of the lubricant return flow rate by comparing the amount of lubricant in different observation holes 480.

[0093] In embodiments of the present invention, such as Figure 6 and Figure 7 In the embodiment shown, the self-lubricating bearing structure also includes two tilting pads 900 that are sleeved on the pump shaft 500 and placed on both sides of the thrust plate 200.

[0094] By setting tilting pads 900 on both sides of the thrust plate 200 along its axial direction, the two tilting pads 900 can withstand the axial load from the thrust plate 200, adapting to the working conditions of bidirectional thrust from the pump shaft 500. Furthermore, the tilting pads 900 have excellent self-centering capability, automatically tilting according to the load direction to form a converging oil wedge, generating a hydrodynamic pressure effect, effectively bearing axial force and reducing frictional loss, thus improving the load-bearing capacity and reliability of the thrust bearing.

[0095] like Figure 6 As shown, when the thrust disk 200 rotates, the pumping groove 210 on the thrust disk 200 cooperates with the pumping flow channel 111 of the pumping ring 100 to generate a pumping effect, conveying the lubricating fluid from the bottom upward along the pumping flow channel 111. During this process, most of the lubricating fluid is thrown out through the gap between the pump ring 110 and the thrust disk 200, and flows downward under the action of gravity, covering the entire surface of the thrust disk 200 and the tilting pads 900 on both sides, and then flows back to the reservoir 410 through the return port 450. A small portion of the lubricating fluid is pumped to the upper part of the pumping ring 100, enters the pressure chamber 10 through the first flow port 123 and the second flow port 131, and returns to the reservoir 410 through the return channel 460 under pressure, forming a self-circulating loop.

[0096] Implementation Method 3

[0097] An embodiment of the present invention provides a pump device including a self-lubricating bearing structure as described in Embodiment 2. The specific construction and beneficial effects of this self-lubricating bearing structure are the same as those described in Embodiment 2, and will not be described in detail here.

[0098] Designers may adjust the specific type of pump equipment according to usage requirements, and no specific restrictions are imposed here. For example, in one feasible embodiment, the pump equipment is an axial flow pump.

[0099] All articles and references disclosed herein, including patent applications and publications, are incorporated herein by reference for various purposes. The term “substantially constitutes…” used to describe a combination should include the identified element, component, part, or step, as well as other elements, components, parts, or steps that do not substantially affect the essential novelty of the combination. The use of the terms “comprising” or “including” to describe combinations of elements, components, parts, or steps herein also contemplates embodiments substantially constituted by such elements, components, parts, or steps. The use of the term “may” herein is intended to indicate that any described attribute included by “may” is optional. Multiple elements, components, parts, or steps can be provided by a single integrated element, component, part, or step. Alternatively, a single integrated element, component, part, or step can be divided into multiple separate elements, components, parts, or steps. The use of “a” or “an” to describe an element, component, part, or step is not intended to exclude other elements, components, parts, or steps.

[0100] The terms used to describe orientation in this document are based on the orientation of the device or equipment under normal operating conditions and should not be construed as a restriction that the device or equipment must maintain that orientation or attitude under all circumstances. The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A pumping ring for use in pumping equipment, characterized in that, The pumping ring includes a pump ring portion (110) for sleeved on the outside of the thrust disc (200) of the pump equipment, and a first side ring portion (120) and a second side ring portion (130) disposed opposite to the axial ends of the pump ring portion (110). The pump ring (110) has a pumping channel (111) on its inner circumferential surface facing the thrust plate (200). The pumping channel (111) forms a structure that gradually converges and then gradually expands from bottom to top. The lower part of the first side ring (120) has a first through hole (121) for connecting the pumping channel (111). The first through hole (121) is used for the entry of lubricating fluid in the pump equipment. The upper part of the first side ring (120) has a first overflow port (123) that passes through the first side ring (120) along the axial direction of the thrust plate (200). The outer circumferential side of the upper part of the pump ring (110) forms a pressure chamber (10). The first overflow port (123) connects to the pressure chamber (10). The pressure chamber (10) is used for the discharge of lubricating fluid in the pump equipment.

2. The pumping ring as described in claim 1, characterized in that, The outer peripheral surface of the pump ring (110) is provided with a flow-blocking portion (140) that extends circumferentially and protrudes radially. The flow-blocking portion (140) is separated from the first flow port (123) in the axial direction of the pump ring (110) and faces the first flow port (123).

3. The pumping ring as described in claim 2, characterized in that, The upper part of the second side ring (130) is provided with a second flow port (131) that passes through the second side ring (130) along the axial direction of the thrust plate (200). The first flow port (123) and the second flow port (131) are respectively provided on both sides of the axial direction of the baffle (140).

4. The pumping ring as described in claim 2, characterized in that, The outer circumferential surface of the pump ring (110) is also provided with a first protrusion (112) and a second protrusion (113) that are radially protruding. The first protrusion (112) and the second protrusion (113) are located on both sides of the pressure chamber (10) in the circumferential direction of the pump ring (110).

5. The pumping ring as described in claim 4, characterized in that, The pump ring (110) has a first oil reservoir (114) and a second oil reservoir (115) on its inner circumferential surface. The first oil reservoir (114) protrudes towards the outer circumferential side to form the first protrusion, and the second oil reservoir (115) protrudes towards the outer circumferential side to form the second protrusion.

6. The pumping ring as described in claim 1, characterized in that, The pumping channel (111) is streamlined.

7. The pumping ring as described in claim 1, characterized in that, The lower part of the first side ring (120) is also provided with a second through hole (122). The first through hole (121) and the second through hole (122) are respectively connected to the two ends of the pumping channel (111). The first through hole (121) and the second through hole (122) are both used for the entry and exit of lubricating fluid, and are configured such that one of the first through hole (121) and the second through hole (122) is used for the entry of lubricating fluid and the other is used for the exit of lubricating fluid.

8. The pumping ring as described in claim 7, characterized in that, The lower part of the pump ring (110) is provided with a first flow groove (151) and a second flow groove (152) recessed towards the outer periphery. The first flow groove (151) and the second flow groove (152) are separated by a third protrusion (150) in the circumferential direction. The first flow groove (151) connects the first through hole (121) to one end of the pumping channel (111), and the second flow groove (152) connects the second through hole (122) to the other end of the pumping channel (111).

9. The pumping ring as described in claim 8, characterized in that, The lower part of the second side ring (130) is provided with a third through hole (132) and a fourth through hole (133). The third through hole (132) and the fourth through hole (133) are respectively opposite to the first through hole (121) and the second through hole (122). The third through hole (132) is connected to the first flow groove (151), and the fourth through hole (133) is connected to the second flow groove (152).

10. A self-lubricating bearing structure, characterized in that, It includes a thrust disk (200) and a pumping ring (100) as described in any one of claims 1 to 9, wherein the pumping ring (100) is rotatably sleeved on the outside of the thrust disk (200), and the thrust disk (200) has a plurality of pumping grooves (210) spaced around the outer peripheral surface of the pumping ring (100).

11. The self-lubricating bearing structure as described in claim 10, characterized in that, The self-lubricating bearing structure further includes a bearing housing (400), a pump shaft (500) rotatably passing through the bearing housing (400), and a radial bearing (600) disposed on the pump shaft (500); the bearing housing (400) is provided with a bearing chamber (401) and a liquid storage chamber (410); the pumping ring (100) and the thrust disk (200) are both disposed in the bearing chamber (401); the thrust disk (200) is disposed on the pump shaft (500) and arranged at intervals with the radial bearing (600); the liquid storage chamber (410) is connected to the first through hole (121) of the pumping ring (100), and a return channel (460) is provided between the liquid storage chamber (410) and the pressure chamber (10) of the pumping ring (100).

12. The self-lubricating bearing structure as described in claim 11, characterized in that, The self-lubricating bearing structure also includes an oil return component (300) disposed in the bearing housing (400); the oil return component (300) is disposed at the inlet of the return channel (460) and fixed relative to the bearing housing (400); the oil return component (300) passes through the first flow port (123) and communicates with the pressure chamber (10); the oil return component (300) is configured to limit the rotation range of the pumping ring (100) by abutting against the two side walls of the first flow port (123).

13. The self-lubricating bearing structure as described in claim 12, characterized in that, The pumping ring (100) includes a first through hole (121) and a second through hole (122). The pumping ring (100) has a positive circulation position and a negative circulation position that can be switched by the rotation direction of the thrust plate (200). When the pumping ring (100) is in the positive circulation position, one of the two side walls of the first flow port (123) is used to abut against the oil return component (300) to limit the first through hole (121) for the entry of lubricating fluid in the pumping equipment and the second through hole (122) for the discharge of lubricating fluid in the pumping equipment. When the pumping ring (100) is in the negative circulation position, the other side wall of the first flow port (123) is used to abut against the oil return component (300) to limit the first through hole (121) for the discharge of lubricating fluid in the pumping equipment and the second through hole (122) for the entry of lubricating fluid in the pumping equipment.

14. The self-lubricating bearing structure as described in claim 13, characterized in that, The bearing housing (400) further includes a first oil suction pipe (430) and a second oil suction pipe (440) arranged at intervals and connected to the liquid storage chamber (410), and an oil return port (450) disposed between the first oil suction pipe (430) and the second oil suction pipe (440) and connected to the liquid storage chamber (410). When the pumping ring (100) is in the positive circulation position, the first through hole (121) and the second through hole (122) of the pumping ring (100) are respectively connected to the first oil suction pipe (430) and the oil return port (450). When the pumping ring (100) is in the reverse circulation position, the first through hole (121) and the second through hole (122) of the pumping ring (100) are respectively connected to the return oil port (450) and the second suction pipe (440).

15. The self-lubricating bearing structure as described in claim 14, characterized in that, The bearing housing (400) also includes a cooling chamber (420) connected to the liquid storage chamber (410). The cooling chamber (420) is provided with a cooler (421) for cooling the lubricating fluid in the liquid storage chamber (410). The oil return port (450) is connected to the cooling chamber (420).

16. The self-lubricating bearing structure as described in claim 15, characterized in that, The cooler (421) includes, but is not limited to, one of the following: tube bundle cooler, coil cooler, and finned cooler.

17. The self-lubricating bearing structure as described in claim 12, characterized in that, The self-lubricating bearing structure also includes a return pipe (700) for connecting the liquid storage chamber (410), the return channel (460) connects the return pipe (700) and the pressure chamber (10), and the oil return component (300) is inserted at the inlet of the return channel (460).

18. The self-lubricating bearing structure as described in claim 17, characterized in that, The bearing housing (400) includes a support portion (470) arranged around the radial bearing (600), the return pipe (700) and the pumping ring (100) are arranged opposite to each other on both sides of the support portion (470), and the return channel (460) passes through the support portion (470) along the axial direction of the pump shaft (500).

19. The self-lubricating bearing structure as described in claim 17, characterized in that, The oil return component (300) is a positioning pin, and the positioning pin is provided with an oil return through hole that passes through the positioning pin. The positioning pin is threadedly connected to the return channel (460).

20. The self-lubricating bearing structure as described in claim 19, characterized in that, The bearing housing (400) is also provided with at least one observation hole (480) extending from the outside to the return channel (460), and the observation hole (480) is provided with a matching plug (490).

21. The self-lubricating bearing structure as described in claim 11, characterized in that, The self-lubricating bearing structure also includes two tilting pads (900) sleeved on the pump shaft (500) and placed on both sides of the thrust plate (200) axially.

22. A pump device, characterized in that, Includes the self-lubricating bearing structure as described in any one of claims 10 to 21.

Images