Bearing, transmission system and rail vehicle

Abstract

The invention discloses a bearing, a transmission system and a rail vehicle. The bearing comprises a bearing body; the breather valve is arranged on the bearing body and can be opened or closed, and when the breather valve is opened, the interior of the bearing body communicates with the external environment; when the breather valve is closed, the interior of the bearing body is closed; the temperature detection part is arranged on at least one of the bearing body and the breather valve and is used for detecting the temperature in the bearing body so as to open the breather valve when the temperature in the bearing body reaches a first preset temperature value; and when the temperature in the bearing body reaches a second preset temperature value, the breather valve is closed. By arranging the breather valve and the temperature detection part, the temperature detection part is used for monitoring the internal temperature of the bearing in real time, when the internal temperature of the bearing body reaches a first preset temperature value, the breather valve is opened, the internal temperature of the bearing is reduced through exhausting, and when the internal temperature of the bearing is reduced to a second preset temperature value, the breather valve is closed; and external foreign matters are prevented from entering the bearing.

Description

Technical Field

[0001] The present invention relates to the technical field of bearing structures, and more specifically, to a bearing. In addition, the present invention also relates to a transmission system including the above bearing and a rail vehicle including the above transmission system. Background Art

[0002] Bearings have important applications in the transmission systems of rail vehicles. In order to improve the self-sealing performance of bearings, contact-type sealing structures are adopted for bearings. This kind of sealing structure causes the internal pressure of the bearings to be unable to be released during high-speed operation, resulting in a relatively high temperature rise inside the bearings.

[0003] In order to reduce the internal temperature of the bearings, in related technologies, fixed ventilation devices are adopted to release the internal pressure of the bearings and prevent the internal temperature of the bearings from rising too high. However, this kind of fixed ventilation device is easily blocked by grease, resulting in the failure of the ventilation function, which will also cause the internal temperature of the bearings to be too high. When the internal temperature of the bearings rises too high, an alarm is triggered, affecting the normal operation of the rail vehicle.

[0004] In summary, how to prevent the internal temperature of the bearings from being too high is an urgent problem to be solved by those skilled in the art at present. Summary of the Invention

[0005] In view of this, an object of the present invention is to provide a bearing that can prevent its internal temperature from being too high.

[0006] Another object of the present invention is to provide a transmission system including the above bearing, which can prevent the internal temperature of the bearing from being too high and ensure the reliability of the transmission system.

[0007] Another object of the present invention is to provide a rail vehicle including the above transmission system, which can prevent the internal temperature of the bearing from being too high, ensure the reliability of the transmission system, and thus ensure the safe and reliable operation of the rail vehicle.

[0008] In order to achieve the above objects, the present invention provides the following technical solutions:

[0009] A bearing, comprising:

[0010] A bearing body;

[0011] A breathing valve, provided on the bearing body, which can be opened or closed. When the breathing valve is opened, the inside of the bearing body is communicated with the external environment; when the breathing valve is closed, the inside of the bearing body is sealed;

[0012] A temperature detection component is provided on at least one of the bearing body and the breather valve, and is used to detect the temperature inside the bearing body, so as to open the breather valve when the temperature inside the bearing body reaches a first preset temperature value; and close the breather valve when the temperature inside the bearing body reaches a second preset temperature value.

[0013] Optionally, the temperature detection component is a temperature-sensitive element. When the temperature-sensitive element is heated, it deforms and returns to its original shape when the temperature decreases; the breather valve opens under the deformation of the temperature-sensitive element and closes under the action of the temperature-sensitive element returning to its original shape.

[0014] Optionally, the breather valve includes:

[0015] A valve seat is provided with a ventilation hole, and the ventilation hole is used to communicate the inside of the bearing body with the external environment;

[0016] A valve core can move relative to the valve seat to block or open the ventilation hole. When the valve core blocks the ventilation hole, the valve core axially penetrates the ventilation hole.

[0017] Optionally, the valve seat is provided with a groove, and the ventilation hole is provided at the bottom of the groove; the valve core is arranged in the groove.

[0018] Optionally, one end of the valve core away from the ventilation hole is connected with a top plate. When the breather valve is closed, the top plate closes the opening of the groove; when the breather valve is opened, the top plate moves away from the opening of the groove.

[0019] Optionally, a limiting groove is provided at the opening of the valve seat near the groove. The limiting groove and the groove form a stepped groove, and the limiting groove is used to limit the top plate.

[0020] Optionally, the temperature-sensitive element is a shape memory alloy spring. The shape memory alloy spring is sleeved on the outer peripheral part of the valve core, and both ends of the shape memory alloy spring are respectively abutted against the valve core and the valve seat.

[0021] Optionally, the bearing body includes a bearing inner ring and a bearing outer ring, and the breather valve is arranged on the bearing outer ring.

[0022] A transmission system includes the above-mentioned bearing.

[0023] An orbital vehicle includes the above-mentioned transmission system.

[0024] The bearing provided by the present invention has the following beneficial effects:

[0025] During operation, the internal temperature of the bearing body is detected by a temperature detection component. When the temperature detection component detects that the internal temperature of the bearing body reaches the first preset temperature value, the breather valve is opened. At this time, the inside of the bearing body is communicated with the external environment to achieve exhaust, ensuring that the internal air pressure of the bearing is balanced with the outside, so as to achieve the purpose of reducing the internal working temperature of the bearing. In addition, when the temperature detection component detects that the temperature inside the bearing drops to the second preset temperature value, the breather valve is closed. At this time, the inside of the bearing body is isolated from the external environment, and the inside of the bearing body is closed, which can prevent foreign objects from entering the bearing.

[0026] That is to say, by setting a breather valve and a temperature detection component, the bearing can monitor the internal temperature of the bearing in real time through the temperature detection component, and realize the automatic breathing function of the bearing through the opening and closing of the breather valve. By exhausting, the purpose of reducing the internal temperature of the bearing is achieved, and the internal temperature of the bearing is prevented from being too high. Moreover, by actively opening and closing the breather valve, compared with the fixed ventilation device in the related technology, the action of the breather valve is beneficial to removing the grease and preventing the ventilation failure caused by being blocked by the grease.

[0027] The transmission system provided by the present invention includes the above-mentioned bearing and at least includes the beneficial effects of the above-mentioned bearing.

[0028] The rail vehicle provided by the present invention includes the above-mentioned transmission system, and the above-mentioned transmission system includes the above-mentioned bearing. Therefore, the rail vehicle at least includes the beneficial effects of the above-mentioned bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the following will briefly introduce the drawings required for use in the description of the embodiments or related technologies. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0030] Figure 1 It is a schematic structural diagram of the bearing applied to the transmission system provided by the specific embodiment of the present invention;

[0031] Figure 2 For Figure 1 The partial enlarged view of A in

[0032] Figure 3 It is a cross-sectional view when the breather valve is closed;

[0033] Figure 4 It is a cross-sectional view when the breather valve is opened.

[0034] Reference numerals:

[0035] 1 - Bearing body; 2 - Breather valve; 21 - Valve seat; 211 - Vent hole; 212 - Groove; 213 - Limit groove; 22 - Valve core; 23 - Top plate; 3 - Temperature memory alloy spring; 4 - Axle box body. Specific embodiments

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0037] The core of the present invention is to provide a bearing that can prevent its internal temperature from being too high. Another core of the present invention is to provide a transmission system including the above - mentioned bearing, which can prevent the internal temperature of the bearing from being too high and ensure the reliability of the transmission system. Another core of the present invention is to provide a rail vehicle including the above - mentioned transmission system, which can prevent the internal temperature of the bearing from being too high, ensure the reliability of the transmission system, and thus ensure the safe and reliable operation of the rail vehicle.

[0038] Please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 An embodiment of the present invention provides a bearing, including a bearing body 1, a breather valve 2, and a temperature detection member. The breather valve 2 is arranged on the bearing body 1. The breather valve 2 can be opened or closed. When the breather valve 2 is opened, the inside of the bearing body 1 is communicated with the external environment; when the breather valve 2 is closed, the inside of the bearing body 1 is sealed. The temperature detection member is arranged on at least one of the bearing body 1 and the breather valve 2, and is used to detect the temperature inside the bearing body 1, so as to open the breather valve 2 when the temperature inside the bearing body 1 reaches a first preset temperature value; and close the breather valve 2 when the temperature inside the bearing body 1 reaches a second preset temperature value.

[0039] During operation, the temperature detection member is used to detect the internal temperature of the bearing body 1. When the temperature detection member detects that the internal temperature of the bearing body 1 reaches the first preset temperature value, the breather valve 2 is opened. At this time, the inside of the bearing body 1 is communicated with the external environment to achieve exhaust, ensuring the balance of the internal pressure of the bearing and the external environment, so as to achieve the purpose of reducing the internal working temperature of the bearing; in addition, when the temperature detection member detects that the internal temperature of the bearing drops to the second preset temperature value, the breather valve 2 is closed. At this time, the inside of the bearing body 1 is isolated from the external environment, and the inside of the bearing body 1 is sealed, which can prevent foreign objects from entering the bearing.

[0040] That is to say, in the embodiment of the present invention, by providing a breathing valve 2 and a temperature detection component, the temperature inside the bearing is monitored in real time by the temperature detection component, and the automatic breathing function of the bearing is realized through the opening and closing of the breathing valve 2. The purpose of reducing the temperature inside the bearing is achieved by exhausting gas, preventing the temperature inside the bearing from being too high. Moreover, by actively opening and closing the breathing valve 2, compared with the fixed ventilation device in the related art, the action of the breathing valve 2 is beneficial to removing the grease and preventing the ventilation failure caused by being blocked by the grease.

[0041] It should be noted that the embodiment of the present invention does not limit the specific values of the first preset temperature value and the second preset temperature value. As long as it can be satisfied that when the temperature inside the bearing reaches the first preset temperature value, the breathing valve 2 can be opened; when the temperature inside the bearing is lower than the second preset temperature value, the breathing valve 2 can be closed. It can be understood that the first preset temperature value should not be too high, otherwise the purpose of reducing the temperature inside the bearing cannot be achieved; the second preset temperature value should not be too low, otherwise the sealing effect of the bearing at low temperature cannot be ensured. For example, in some embodiments, the first preset temperature value can be 40°C, that is, when the temperature inside the bearing reaches 40°C, the breathing valve 2 opens.

[0042] In addition, it should be noted that the embodiment does not specifically limit the specific structure of the temperature detection component and its detection principle, etc., as long as the temperature detection component can detect the temperature inside the bearing.

[0043] Considering the simplicity of the structure and the convenience of realizing the opening and closing of the breathing valve 2, in some embodiments, the temperature detection component is a temperature-sensitive element. The temperature-sensitive element deforms when heated and recovers its deformation when the temperature decreases; the breathing valve 2 opens under the action of the deformation of the temperature-sensitive element and closes under the action of the temperature-sensitive element recovering its deformation.

[0044] That is to say, the temperature detection component in this embodiment is a temperature-sensitive element that can generate mechanical deformation with the change of temperature. The mechanical deformation of the temperature-sensitive element is used to drive the breathing valve 2 to open or close, realizing the mechanical linkage between the breathing valve 2 and the temperature-sensitive element. This structure is simple and convenient to control the opening and closing of the breathing valve 2, and the breathing valve 2 can be actively opened or closed with the change of temperature.

[0045] It should be noted that the embodiment does not limit the specific structure of the temperature-sensitive element and its detection principle, etc., as long as the temperature-sensitive element can generate mechanical deformation when heated and can drive the breathing valve 2 to open or close. For example, the temperature-sensitive element can be a shape memory alloy part. The shape memory alloy part elongates at high temperature and can open the breathing valve 2; when the temperature drops, the shape memory alloy part recovers its deformation and shrinks, closing the breathing valve 2.

[0046] In addition, in order to facilitate the removal of the lubricating grease falling into the inside of the breathing valve 2, such asFigure 3 and Figure 4 As shown in Figure 4 , in some embodiments, the breathing valve 2 includes a valve seat 21 and a valve core 22. The valve seat 21 is provided with a vent hole 211 for communicating the inside of the bearing body 1 with the external environment. The valve core 22 is movable relative to the valve seat 21 to block or open the vent hole 211. When the valve core 22 blocks the vent hole 211, the valve core 22 axially penetrates through the vent hole 211.

[0047] That is to say, in this embodiment, by moving the valve core 22 relative to the valve seat 21 and using the valve core 22 to avoid or block the vent hole 211, the opening or closing of the breathing valve 2 is realized. Since the valve core 22 penetrates through the inside of the vent hole 211 when the valve core 22 blocks the vent hole 211, when the valve core 22 moves, the valve core 22 moves axially relative to the vent hole 211, which is beneficial to removing the grease covering the vent hole 211, avoiding the risk of the vent hole 211 being blocked, and ensuring the reliability of ventilation.

[0048] It should be noted that the specific shape of the vent hole 211 in this embodiment is not limited. For example, the vent hole 211 can be a circular hole, and the valve core 22 can be a cylinder.

[0049] In addition, the specific structure of the valve seat 21 in this embodiment is not limited, as long as the valve seat 21 is provided with a vent hole 211 and can enable the valve core 22 to move relative to the valve seat 21.

[0050] As Figure 4 shown, in some embodiments, the valve seat 21 is provided with a groove 212, and the vent hole 211 is provided at the bottom of the groove 212. The valve core 22 is arranged in the groove 212.

[0051] That is to say, in this embodiment, the valve core 22 is accommodated in the groove 212, which is beneficial to saving space. The vent hole 211 is provided at the bottom of the groove 212, and the wall thickness of the bottom of the groove 212 is the axial length of the vent hole 211, which is beneficial to reducing the length of the vent hole 211, reducing the stroke of the valve core 22 moving relative to the vent hole 211, thereby ensuring the smooth movement of the valve core 22 and reducing the wear of the valve core 22.

[0052] Furthermore, as Figure 3 and Figure 4 shown, in some embodiments, one end of the valve core 22 away from the vent hole 211 is connected with a top plate 23. When the breathing valve 2 is closed, the top plate 23 closes the opening of the groove 212. When the breathing valve 2 is opened, the top plate 23 moves away from the opening of the groove 212.

[0053] That is to say, in this embodiment, the top plate 23 is used to close the opening of the groove 212, so that when the valve core 22 closes the vent hole 211, the groove 212 is also in a closed state, thereby preventing too much grease and the like from entering the groove 212. In addition, when the breather valve 2 is opened, the top plate 23 moves away from the opening of the groove 212, which is beneficial to using the top plate 23 to push open the grease outside the breather valve 2 when the breather valve 2 is opened, playing a role in removing the grease outside the breather valve 2, preventing the risk of blockage of the breather valve 2, and ensuring the reliability of ventilation.

[0054] In some embodiments, the top plate 23 is perpendicularly arranged with respect to the valve core 22. For example, the top plate 23 and the valve core 22 form a structure similar to a "T" shape.

[0055] Furthermore, as Figure 3 and Figure 4 shown, in some embodiments, a limiting groove 213 is provided at the opening of the valve seat 21 close to the groove 212. The limiting groove 213 and the groove 212 form a stepped groove, and the limiting groove 213 is used to limit the top plate 23.

[0056] That is to say, when the breather valve 2 is closed, at least a part of the top plate 23 is located in the limiting groove 213. The step surface at the intersection of the limiting groove 213 and the groove 212 plays a role in stopping and limiting the top plate 23, which can ensure the accuracy of the position of the valve core 22 and avoid the valve core 22 extending too far into the bearing body 1. At the same time, the side wall of the limiting groove 213 also plays a role in circumferentially limiting the outer periphery of the top plate 23 to ensure the accuracy of the radial position of the valve core 22.

[0057] In addition, considering the convenience of setting the temperature-sensitive element, as Figure 3 and Figure 4 shown, in some embodiments, the temperature-sensitive element is a shape memory alloy spring 3 for temperature. The shape memory alloy spring 3 for temperature is sleeved on the outer periphery of the valve core 22, and both ends of the shape memory alloy spring 3 for temperature are respectively abutted against the valve core 22 and the valve seat 21. For example, when one end of the valve core 22 far from the vent hole 211 is connected with the top plate 23, one end of the shape memory alloy spring 3 for temperature can be abutted against the top plate 23, and the other end is abutted against the bottom of the groove 212.

[0058] In this embodiment, the shape memory alloy spring 3 for temperature is sleeved on the outer periphery of the valve core 22, which can use the valve core 22 to play a role in limiting and guiding the shape memory alloy spring 3 for temperature to prevent the shape memory alloy spring 3 for temperature from skewing and the like. Moreover, the spring structure is simple, and both ends of the shape memory alloy spring 3 for temperature are respectively abutted against the valve core 22 and the valve seat 21, which is convenient to set.

[0059] In addition, it should be noted that the specific installation position of the breathing valve 2 in the above embodiments is not limited. For example, in some embodiments, the bearing body 1 includes an inner bearing ring and an outer bearing ring, and the breathing valve 2 is arranged on the outer bearing ring to facilitate ventilation between the inside of the bearing and the external environment of the bearing.

[0060] In addition to the above bearings, the embodiments of the present invention also provide a transmission system including the bearings disclosed in the above embodiments.

[0061] The key point of this embodiment is that the transmission system adopts the bearings disclosed in any one of the above embodiments. Therefore, the transmission system at least includes the beneficial effects of the above bearings, which will not be elaborated here.

[0062] It should be noted that the specific structure of the transmission system in this embodiment is not limited as long as the transmission system includes the above bearings. For example, the transmission system includes a shaft housing 4 and a transmission shaft, and the bearing is arranged between the transmission shaft and the shaft housing 4. For the structures of other parts of the transmission system, please refer to the relevant technologies and will not be elaborated here.

[0063] In addition to the above bearings and transmission systems, the embodiments of the present invention also provide a rail vehicle including the transmission system disclosed in the above embodiments. For the structures of other parts of the rail vehicle, please refer to the relevant technologies and will not be elaborated here.

[0064] The key point of this embodiment is that the rail vehicle adopts the transmission system disclosed in the above embodiments. Since the above transmission system adopts the bearings disclosed in any one of the above embodiments, the rail vehicle at least includes the beneficial effects of the above bearings, which will not be elaborated here.

[0065] It should also be noted that in this specification, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0066] The various embodiments in this specification are described in a progressive manner. The key point of each embodiment is the difference from other embodiments. For the same or similar parts between the various embodiments, reference can be made to each other.

[0067] The above has introduced in detail the bearings, transmission systems and rail vehicles provided by the present invention. Specific examples are used in this article to elaborate on the principles and implementation manners of the present invention. The descriptions of the above embodiments are only used to help understand the method and its core idea of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the present invention.

Claims

1. A bearing, characterized in that, Comprising: Bearing body (1); Breather valve (2), provided on the bearing body (1), which can be opened or closed. When the breather valve (2) is opened, the interior of the bearing body (1) communicates with the external environment; when the breather valve (2) is closed, the interior of the bearing body (1) is sealed. Temperature detection component, provided on at least one of the bearing body (1) and the breather valve (2), for detecting the temperature inside the bearing body (1), so as to open the breather valve (2) when the temperature inside the bearing body (1) reaches a first preset temperature value; and close the breather valve (2) when the temperature inside the bearing body (1) reaches a second preset temperature value.

2. The bearing according to claim 1, characterized in that, The temperature detection component is a temperature-sensitive element. The temperature-sensitive element deforms when heated and recovers its deformation when the temperature decreases; the breather valve (2) is opened under the action of the deformation of the temperature-sensitive element and closed under the action of the recovery of the deformation of the temperature-sensitive element.

3. The bearing according to claim 2, wherein, The breather valve (2) comprises: Valve seat (21), provided with a ventilation hole (211), and the ventilation hole (211) is used to communicate the interior of the bearing body (1) with the external environment; Valve core (22), which can move relative to the valve seat (21) to block or open the ventilation hole (211). When the valve core (22) blocks the ventilation hole (211), the valve core (22) axially penetrates the ventilation hole (211).

4. The bearing according to claim 3, characterized in that, The valve seat (21) is provided with a groove (212), and the ventilation hole (211) is provided at the bottom of the groove (212); the valve core (22) is arranged in the groove (212).

5. The bearing according to claim 4, characterized in that, One end of the valve core (22) away from the ventilation hole (211) is connected with a top plate (23). When the breather valve (2) is closed, the top plate (23) seals the opening of the groove (212); when the breather valve (2) is opened, the top plate (23) moves in a direction away from the opening of the groove (212).

6. The bearing according to claim 4, characterized in that, A limiting groove (213) is provided at the opening of the valve seat (21) near the groove (212), and the limiting groove (213) and the groove (212) form a stepped groove, and the limiting groove (213) is used to limit the top plate (23).

7. The bearing according to any one of claims 3-6, characterized in that, The temperature-sensitive element is a shape memory alloy spring (3). The shape memory alloy spring (3) is sleeved on the outer periphery of the valve core (22), and both ends of the shape memory alloy spring (3) are respectively in contact with the valve core (22) and the valve seat (21).

8. The bearing according to any one of claims 1-6, characterized in that, The bearing body (1) includes a bearing inner ring and a bearing outer ring, and the breather valve (2) is provided on the bearing outer ring.

9. A transmission system, characterized in that, Comprising the bearing according to any one of claims 1-8.

10. An orbital vehicle, characterized in that, Comprising the transmission system according to claim 9.

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