A heat dissipating bearing bush and a sliding bearing

Abstract

The present invention belongs to the field of bearing parts, and discloses a heat-dissipating bearing and a sliding bearing, wherein the bearing comprises a bearing body, and the bearing body is provided with a lubrication channel, and the lubrication channel is used to circulate and supply lubricating oil to the inner circumference of the bearing body, and the bearing body is also provided with a heat dissipation channel, and the heat dissipation channel adopts a Tesla valve structure, and the heat dissipation channel and the lubrication channel are both connected to the same oil supply system. The present invention integrates a heat dissipation channel with a Tesla valve structure in the bearing, which can not only assist in heat dissipation, but also avoids the influence of the heat dissipation channel on the oil pressure of the normal lubrication of the lubrication channel under high pressure or low pressure environment.

Description

Technical Field

[0001] The present invention relates to the technical field of bearing components, and in particular to a heat dissipating bearing bush and a sliding bearing. Background Art

[0002] Sliding bearings are important parts in mechanical equipment, which have the advantages of high load-bearing capacity, stable operation, good vibration absorption, etc. With the development of mechanical equipment towards high speed, high power, high automation, etc., the working conditions of sliding bearings have become more severe, so higher requirements are put forward for the heat dissipation of sliding bearings.

[0003] The heat dissipation of sliding bearings is mainly the heat dissipation of bearing shells. There are two main traditional heat dissipation methods: one is to remove part of the heat through lubricating oil, and the other is to dissipate heat directly through bearing shells. In order to improve the heat dissipation capacity of bearing shells, there are the following difficulties in design:

[0004] 1. It is not possible to design a larger relative clearance unilaterally in order to increase the flow of lubricating oil;

[0005] 2. For high-speed and heavy-loaded bearings, the alloy layer of the inner ring of the bearing cannot be designed to be too thin simply for the purpose of heat dissipation. Otherwise, it will affect the supporting strength and fail to protect the shaft system under extreme working conditions such as oil outage. Summary of the invention

[0006] In view of the problem that the heat dissipation capacity of bearings under existing high-speed, high-power, high-automation working conditions is not high, the present invention provides a heat-dissipating bearing and a sliding bearing, which can effectively improve the heat dissipation capacity of the bearing, while ensuring the supporting strength of the bearing and the pressure stability of the lubricating oil system.

[0007] The present invention is achieved through the following technical solutions:

[0008] A heat dissipation type bearing includes a bearing body, a lubrication channel is arranged on the bearing body, and the lubrication channel is used to circulate lubricating oil to the inner circle side of the bearing body. A heat dissipation channel is also arranged in the bearing body, and the heat dissipation channel adopts a Tesla valve structure. The heat dissipation channel and the lubrication channel are both connected to the same oil supply system.

[0009] Optionally, the heat dissipation channel includes a plurality of Tesla valve units, the Tesla valve units include a direct current channel and a vortex flow channel, an intersection cavity is arranged at the end position of the vortex flow channel intersecting with the direct current channel, an elastic valve plate is arranged in the intersection cavity, and the elastic valve plate can be in a first position state when the lubricating oil in the intersection cavity is at a first pressure value; when the lubricating oil in the intersection cavity is at a second pressure value, the elastic valve plate is in a second position state; and when the second pressure value is greater than the first pressure value, the opening size of the intersection cavity in the second position state is greater than the opening size of the intersection cavity in the first position state.

[0010] Optionally, the elastic valve sheet has a fixed end and a movable end, the elastic valve sheet is fixed on the outer vortex inner wall of the vortex flow channel in the intersection chamber through the fixed end, and the movable end of the elastic valve sheet is arranged in the intersection chamber.

[0011] Optionally, the elastic valve plate includes a valve plate body and a supporting portion, the valve plate body includes the fixed end and the movable end, one end of the supporting portion is connected to the valve plate body, thereby forming an angle structure between the supporting portion and the valve plate body, and the supporting portion located on the inner side of the angle structure is attached to the inner wall of the direct current channel of the adjacent Tesla valve unit to support the valve plate body.

[0012] Optionally, at least one damping adjustment component is arranged between the valve plate body and the support part on the inner side of the angle structure, and the damping adjustment component includes a first component connected to the valve plate body and a second component connected to the support part, the movable end of the first component has a first inverted hook part, and the movable end of the second component has a second inverted hook part, and the first inverted hook part and the second inverted hook part are centrally symmetrically distributed along an axis, thereby enclosing a damping chamber.

[0013] Optionally, 2-3 damping adjustment components are provided.

[0014] Optionally, the heat dissipation channel is arranged along the circumferential direction of the bearing body.

[0015] Optionally, the intersection cavity is an expanding structure that gradually expands along the flow direction of the lubricating oil.

[0016] A sliding bearing comprises the heat dissipating bearing bush.

[0017] The technical solution of the present invention has at least the following beneficial effects:

[0018] The heat dissipation type bearing and sliding bearing of the present invention assist in heat dissipation and reduce the bearing temperature by setting a heat dissipation channel in the bearing to allow lubricating oil to flow through the inside of the bearing; the heat dissipation channel adopts a Tesla valve structure and utilizes the unique vortex structure of the Tesla valve, which can well regulate the flow rate in the heat dissipation channel when the pressure of the lubrication system increases or decreases, thereby avoiding the flow rate in the heat dissipation channel changing too quickly and affecting the stability of the oil pressure in the lubrication channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a principle block diagram of the sliding bearing lubrication system of the present invention;

[0020] Figure 2 A half-section view of a heat dissipation bearing bush of the present invention;

[0021] Figure 3 It is a partial cross-sectional view of the heat dissipation channel of the present invention unfolded along the circumferential direction of the bearing bush to a plane;

[0022] Figure 4 This is a schematic diagram of the heat dissipation channel principle of Example 1 of the present invention;

[0023] Figure 5 This is a schematic diagram of the heat dissipation channel principle of Example 2 of the present invention;

[0024] Figure 6 for Figure 5 A magnified view of part A;

[0025] Figure 7 This is another state diagram of the heat dissipation channel of embodiment 2 of the present invention;

[0026] Figure 8 This is a schematic diagram of the principle of the elastic valve sheet of Example 3 of the present invention;

[0027] Fig. 9 This is another state diagram of the elastic valve plate of Example 3 of the present invention.

[0028] Icons: 1000-bearing body, 1100-heat dissipation channel, 1200-lubrication channel, 2000-lubricating oil circulation supply system, 1110-direct current channel, 1120-vortex flow channel, 1130-elastic valve plate, 1131-valve plate body, 1132-supporting part, 1140-damping chamber, 1141-first component, 1142-first hook part, 1143-second component, 1144-second hook part. DETAILED DESCRIPTION

[0029] Example 1

[0030] Reference Figure 1The heat dissipation bearing of the present invention includes a bearing body 1000, on which a lubrication channel 1200 is provided. The lubrication channel 1200 is used to circulate lubricating oil to the inner circumference of the bearing body 1000. The lubrication channel 1200 is connected to a lubrication oil circulation supply system 2000. The lubrication oil circulation supply system 2000 is mainly composed of a circulation pump and an oil tank, and can supply lubricating oil to the lubrication channel 1200. The outlet section of the lubrication channel 1200 is usually arranged along the radial direction of the bearing. The lubrication oil is discharged from the inner circumference of the bearing and fills the gap between the bearing and the shaft system, forming the effect of supporting and lubricating the shaft system. Although the oil in the lubrication channel 1200 has a heat dissipation effect in addition to lubrication, as mechanical equipment develops towards high speed, high power, high automation, etc., it is difficult to meet the heat dissipation requirements by relying solely on the oil supply and lubrication of the lubrication channel 1200. The inventor proposed to set a heat dissipation channel 1100 in the bearing body 1000 to increase the heat dissipation effect of the bearing. The heat dissipation channel 1100 and the lubrication channel 1200 are connected to the same oil supply system, such as the lubrication oil circulation supply system 2000. A part of the lubrication oil provided by the lubrication oil circulation supply system 2000 is directly supplied to the inner circle side of the bearing through the lubrication channel 1200 to complete lubrication; the other part is supplied to the heat dissipation channel 1100 to complete heat dissipation. The heat dissipation channel 1100 is used to assist heat dissipation and reduce the temperature of the bearing. In the initial stage, the inventor thought about designing the heat dissipation channel 1100 as a straight-through structure, but the heat dissipation channel 1100 with a straight-through structure has the following problems:

[0031] If the diameter of the heat dissipation channel 1100 is designed to be small, although the pressure of the lubrication system will increase when the pressure suddenly changes, such as during the start-up phase and high-speed operation phase of the sliding bearing, the small-diameter heat dissipation channel 1100 can suppress the sudden decrease in the lubricating oil pipeline pressure in the lubrication channel 1200 and reduce the impact on it, the heat dissipation area will be insufficient and insufficient heat dissipation effect can be achieved;

[0032] If the diameter of the heat dissipation channel 1100 is designed to be larger, although the heat dissipation area is increased, when the pressure of the lubrication system suddenly changes, the sudden pressure change in the heat dissipation channel 1100 will also cause a sudden change in the flow rate, thereby affecting the oil supply in the lubrication channel 1200. Therefore, the traditional design concept can no longer solve the technical problems existing in the prior art.

[0033] Reference Figure 2-4In this embodiment, the heat dissipation channel 1100 of the bearing body 1000 adopts a Tesla valve structure. First of all, the Tesla valve has a large flow cross-section, which ensures the basic heat dissipation requirements. At the same time, the Tesla valve has a unique vortex structure. The oil inlet of this embodiment is located at the end of the Tesla valve with the vortex structure. In the traditional usage, the fluid entering from this end will be one-way cutoff due to the vortex structure. Therefore, in this embodiment, the inventor has made appropriate improvements to the vortex structure, reasonably controlled the vortex structure, weakened the obstruction of the vortex structure, and ensured that the lubricating oil can circulate normally. However, when the pressure of the lubrication system increases or decreases, the flow velocity in the heat dissipation channel 1100 can be well adjusted due to the obstruction of the vortex structure (or vortex effect), so as to avoid the flow velocity of the heat dissipation channel 1100 changing too fast and affecting the stability of the oil pressure in the lubrication channel 1200. The rotation angle of the vortex structure can be set to a fixed angle as needed. In actual application, for example, when the lubricating bearing is in a high speed state, the pressure of the lubrication system increases, and the lubricating oil required by the shaft system also increases. If too much lubricating oil is diverted by the heat dissipation channel 1100, it is easy to cause bearing operation safety problems. The Tesla valve structure adopted by the heat dissipation channel 1100 has a special structure that can hinder the flow of lubricating oil when the lubricating oil passes through the heat dissipation channel 1100. The greater the pressure, the stronger the obstruction, so that the flow rate tends to a relatively constant state. Therefore, it can effectively prevent the heat dissipation channel 1100 from diverting too much lubricating oil, thereby maintaining the pressure and flow in the lubricating channel 1200 to maintain normal bearing operation.

[0034] In order to improve the heat dissipation performance of the heat dissipation channel 1100, the heat dissipation channel 1100 is preferably arranged along the circumferential direction of the bearing body 1000, which can maintain a more effective heat conduction area and improve the heat dissipation performance.

[0035] The present embodiment also provides a sliding bearing, comprising the bearing shell portion described in the present embodiment.

[0036] Example 2

[0037] The difference between this embodiment and embodiment 1 is that:

[0038] Reference Figure 5-7The heat dissipation channel 1100 includes a plurality of Tesla valve units, and the Tesla valve units include a direct flow channel 1110 and a vortex flow channel 1120. A junction cavity is provided at the end of the vortex flow channel 1120 intersecting with the direct flow channel 1110, and an elastic valve plate 1130 is provided in the junction cavity. The elastic valve plate 1130 can be in a first position state when the lubricating oil in the junction cavity is at a first pressure value; when the lubricating oil in the junction cavity is at a second pressure value, the elastic valve plate 1130 is in a second position state; and when the second pressure value is greater than the first pressure value, the opening size of the junction cavity in the second position state is greater than the opening size of the junction cavity in the first position state. The junction cavity is an expanding structure that gradually expands along the flow direction of the lubricating oil. On the one hand, it is equivalent to having a space for accommodating the elastic valve plate 1130; on the other hand, it can provide a deflection space according to the deflection characteristics of the elastic valve plate 1130.

[0039] Based on the above structure, refer to Figure 6 When the system pressure of the lubrication system is at a relatively low pressure value (first pressure value), such as in a low pressure state, the lubricating oil passes through the intersection cavity of the vortex flow channel 1120, and the pressure is insufficient to change the state of the elastic valve plate 1130, and the elastic valve plate 1130 is stationary (first position state); refer to Figure 7 When the system pressure of the lubrication system is at a relatively high pressure value (second pressure value), such as a medium pressure state or a high pressure state, the lubricating oil passes through the intersection cavity of the vortex flow channel 1120, and the pressure can change the state of the elastic valve plate 1130, that is, the pressure of the lubricating oil will push the elastic valve plate 1130 to move backward, thereby expanding the flow channel (second position state). The reason for adopting such a structural design is that the higher the pressure of the lubrication system, the more obvious the obstruction effect through the vortex flow channel 1120. Although it is possible to avoid the heat dissipation channel 1100 from diverting too much lubricating oil and maintain the pressure and flow in the lubrication channel 1200 to maintain normal bearing operation, the higher the pressure, the more obvious the obstruction effect on the heat dissipation flow channel, which will cause the lubricating oil in the heat dissipation channel 1100 to fail to meet the flow requirement for heat dissipation. Therefore, by adopting the structure of the elastic valve plate 1130, the flow channel size of the intersection cavity can be changed when the lubrication system is under high or low pressure, which can weaken or enhance the obstruction effect and avoid a sharp decrease or increase in the lubricating oil flow in the heat dissipation channel 1100. Such a structural design can keep the lubricating oil in the heat dissipation channel 1100 in a relatively stable state.

[0040] The elastic valve plate 1130 has a fixed end a and a movable end b. The elastic valve plate 1130 is fixed on the outer vortex inner wall of the vortex flow channel 1120 in the intersection cavity through the fixed end a. The movable end b of the elastic valve plate 1130 is arranged in the intersection cavity. The elastic valve plate 1130 is made of elastic material, one end of which is fixed and the other end is movable. The movable end b and the inner wall on the other side of the intersection cavity constitute a part of the vortex flow channel 1120. Under normal pressure, the lubricating oil flows to the support that maintains the cantilever, and the vortex structure has a certain vortex angle and a certain obstruction effect. When the pressure of the lubrication system increases, the pressure will change the movable end b, so that the angle between the movable end b and the inner wall on one side of the intersection cavity is enlarged, so that the vortex angle of the vortex structure becomes smaller, and the obstruction effect becomes smaller, and the lubricating oil in the heat dissipation channel 1100 still maintains a relatively stable constant flow state.

[0041] Furthermore, the elastic valve plate 1130 includes a valve plate body 1131 and a support portion 1132, the valve plate body 1131 includes a fixed end a and a movable end b, one end of the support portion 1132 is connected to the valve plate body 1131, thereby forming an angle structure between the support portion 1132 and the valve plate body 1131, and the support portion 1132 located on the inner side of the angle structure is attached to the inner wall of the direct current channel 1110 of the adjacent Tesla valve unit to support the valve plate body 1131. The valve body 1131 of the elastic valve plate 1130 can maintain a certain movement trajectory and a certain supporting force of the valve body 1131 by connecting the support part 1132, so as to prevent the active end b of the valve body 1131 from being too sensitive. At the same time, the designed angle structure forms a certain wrapping structure. Such an wrapping structure can respond to such changes more quickly during the pressure change process. For example, when the pressure in the heat dissipation channel 1100 increases, it will first act on the outer side of the valve body 1131, and the inner side of the angle structure is isolated from the heat dissipation channel 1100 to a certain extent, so the response will be delayed. In this way, it is easier to form a pressure difference between the inner and outer sides of the angle structure to respond to the pressure adjustment of the elastic valve plate 1130.

[0042] The present embodiment also provides a sliding bearing, comprising the bearing shell portion described in the present embodiment.

[0043] Example 3

[0044] This embodiment is a further improvement on the basis of Embodiment 2:

[0045] Reference Figure 8 and Fig. 9At least one damping adjustment component is arranged between the valve plate body 1131 and the support portion 1132 on the inner side of the angle structure, and the damping adjustment component includes a first component 1141 connected to the valve plate body 1131 and a second component 1143 connected to the support portion 1132. The movable end of the first component 1141 has a first inverted hook portion 1142, and the movable end of the second component 1143 has a second inverted hook portion 1144. The first inverted hook portion 1142 and the second inverted hook portion 1144 are centrally symmetrically distributed along an axis, thereby enclosing a damping chamber 1140. There are 2-3 damping adjustment components, and the first component 1141 and the second component 1143 can be made of metal materials with a certain elasticity. By arranging such a damping adjustment component between the valve body 1131 and the support portion 1132, a relatively closed space is formed between the damping chamber 1140 and the heat dissipation channel 1100, so that when the oil pressure in the heat dissipation channel 1100 changes, the oil pressure in the damping chamber 1140 will not change immediately, so that the deflection of the valve body 1131 itself and the elastic tension between the valve body 1131 and the support portion 1132 can be maintained. When the elastic valve 1130 is in a low tension state (not opened), the damping chamber 1140 will generate a certain damping force, which can suppress the vibration of the valve body 1131 itself through the damping force; on the other hand, the fluctuation of the system oil pressure can also be absorbed by this damping adjustment component. When the tension of the elastic valve plate 1130 increases (opens), the first inverted hook portion 1142 and the second inverted hook portion 1144 of the damping adjustment component move closer to each other, and the multiple damping chambers 1140 move closer in sequence. That is, the damping adjustment component on the outermost side of the angle structure moves closer first, followed by two and three. In this way, the number of interactions between the damping adjustment components increases, and the damping force increases, thereby providing a progressive elastic coefficient for the elastic valve plate 1130. In the face of different bypass oil pressures, it can still provide tension to ensure that the bypass is in a constant flow state.

[0046] The present embodiment also provides a sliding bearing, comprising the bearing shell portion described in the present embodiment.

Claims

1. A heat dissipation bearing, comprising a bearing body, wherein the bearing body is provided with a lubrication channel, wherein the lubrication channel is used to circulate lubricating oil to the inner circumference of the bearing body, wherein: The bearing body is also provided with a heat dissipation channel, and the heat dissipation channel adopts a Tesla valve structure, and the heat dissipation channel and the lubrication channel are both connected to the same oil supply system; The heat dissipation channel includes a plurality of Tesla valve units, and the Tesla valve units include a direct flow channel and a vortex flow channel. An intersection cavity is provided at the end position of the vortex flow channel intersecting with the direct flow channel, and an elastic valve sheet is provided in the intersection cavity. When the lubricating oil in the intersection cavity is at a first pressure value, the elastic valve sheet is in a first position state; When the lubricating oil in the intersection chamber is at a second pressure value, the elastic valve plate is in a second position state; When the second pressure value is greater than the first pressure value, the opening size of the intersection cavity in the second position state is greater than the opening size of the intersection cavity in the first position state.

2. The heat dissipating bearing according to claim 1, characterized in that: The elastic valve sheet has a fixed end and a movable end. The elastic valve sheet is fixed on the outer vortex inner wall of the vortex flow channel in the intersection cavity through the fixed end. The movable end of the elastic valve sheet is arranged in the intersection cavity.

3. The heat dissipating bearing according to claim 2, characterized in that: The elastic valve plate includes a valve plate body and a supporting portion, the valve plate body includes the fixed end and the movable end, one end of the supporting portion is connected to the valve plate body, thereby forming an angle structure between the supporting portion and the valve plate body, and the supporting portion located on the inner side of the angle structure is attached to the inner wall of the direct current channel of the adjacent Tesla valve unit to support the valve plate body.

4. The heat dissipating bearing bush according to claim 3, characterized in that: At least one damping adjustment component is arranged between the valve plate body and the support part on the inner side of the angle structure, and the damping adjustment component includes a first component connected to the valve plate body and a second component connected to the support part, the movable end of the first component has a first inverted hook part, and the movable end of the second component has a second inverted hook part, the first inverted hook part and the second inverted hook part are centrally symmetrically distributed along an axis, so as to enclose a damping chamber.

5. The heat dissipating bearing bush according to claim 4, characterized in that: The damping adjustment components are provided in 2-3 pieces.

6. The heat dissipating bearing according to any one of claims 1 to 5, characterized in that: The heat dissipation channel is arranged along the circumferential direction of the bearing shell body.

7. The heat dissipating bearing according to any one of claims 1 to 5, characterized in that: The intersection cavity is an expanding structure that gradually expands along the flow direction of the lubricating oil.

8. A sliding bearing, characterized in that: A heat dissipating bearing comprising the heat dissipating bearing described in any one of claims 1 to 7.

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