Axle box lubricating system and rail transit vehicle

Abstract

The invention discloses an axle box lubricating system and a rail transit vehicle, and relates to the technical field of rail transit, the axle box lubricating system comprises a bearing, an oil injection pipe and an oil discharge pipe, the outer ring of the bearing is provided with a plurality of structural holes, and the structural holes comprise oil injection holes and oil discharge holes; the included angle between the oil injection hole and the oil discharge hole is integral multiple of the included angle between two adjacent rollers of the bearing; the oil filling pipe is communicated with the oil filling hole and is provided with an oil filling pump; the oil discharge pipe is communicated with the oil discharge hole and is provided with an oil discharge pump; and when the bearing rotates by a set angle, the oil injection hole and the oil discharge hole are respectively opposite to a gap between two adjacent rollers in the radial direction. The oil drain pump extracts waste grease from the gap between the two adjacent rollers by means of the oil drain pipe, and the oil injection pump injects new grease into the gap between the two adjacent rollers by means of the oil injection pipe; and the steps are circulated and alternated until the bearing rotates by one circle, the lubricating grease in the bearing can be replaced, the axle box does not need to be decomposed in the whole replacement process, and replacement is more convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of rail transit vehicles, and particularly relates to an axle box lubrication system and a rail transit vehicle. Background Art

[0002] With the development of high-speed railways, rail transit vehicles, as an important part of modern transportation, their operation safety is one of the most important considerations. In high-speed EMUs, axle box bearings, as key components of the EMU trains, their performance and the occurrence of faults directly affect the operation safety of rail transit vehicles. The impact and vibration between the rail transit vehicle and the rail will cause the axle box bearings to heat up. To reduce the fatigue damage of the bearings, the grease in the bearings needs to be replaced regularly to extend the service life of the bearings. However, limited by the existing technical level, when replacing the grease, the axle box needs to be disassembled, and the replacement is difficult and inconvenient. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide an axle box lubrication system and a rail transit vehicle, which do not need to disassemble the axle box when replacing the grease in the axle box bearing, and solve the technical problem of inconvenient replacement of the grease in the existing axle box bearing.

[0004] To achieve the above purpose, the present invention provides an axle box lubrication system, including:

[0005] A bearing, the outer ring of the bearing is provided with a plurality of structural holes, the structural holes include an oil injection hole and an oil discharge hole, and the included angle between the oil injection hole and the oil discharge hole is an integer multiple of the included angle between two adjacent rollers of the bearing;

[0006] An oil injection pipe, the oil injection pipe is communicated with the oil injection hole, and the oil injection pipe is provided with an oil injection pump;

[0007] An oil discharge pipe, the oil discharge pipe is communicated with the oil discharge hole, and the oil discharge pipe is provided with an oil discharge pump;

[0008] When the bearing rotates a set angle, the oil injection hole and the oil discharge hole are respectively radially opposite to the gaps between two adjacent rollers.

[0009] Preferably, it further includes an axle box, the axle box includes an upper box body and a lower box body which are detachably connected and distributed up and down; the upper box body is provided with an embedding hole, the embedding hole is detachably provided with an upper cover, the end of the oil injection pipe is fixedly provided with an oil injection gun, and the oil injection gun passes through the upper cover and extends to the embedding hole; when the bearing rotates a set angle, the oil injection hole and the oil injection gun are radially penetrated along the bearing.

[0010] Preferably, a diversion head is installed at the head of the oil injection gun, the diversion head is inserted into the oil injection hole and extends into the gap between two adjacent rollers; a diversion hole is formed in the center of the diversion head, and a plurality of diversion holes are provided at one end of the diversion head inserted into the gap, and all the diversion holes are distributed in a cross shape and are communicated with the diversion hole.

[0011] Preferably, the oil injection hole is provided with a limiting step, and the diversion head is provided with a limiting flange, and the limiting flange and the limiting step are matched with each other along the radial direction of the bearing.

[0012] Preferably, it further includes:

[0013] A rotation angle detection member for detecting the rotation angle of the bearing;

[0014] A main drive motor connected to the bearing;

[0015] An oil drainage motor connected to the oil drainage pump;

[0016] An oil injection motor connected to the oil injection pump;

[0017] When the rotation angle detection member detects that the bearing rotates by a set angle, the controller is used to control the main drive motor to stop rotating according to the signal fed back by the rotation angle detection member, and control the oil drainage motor and the oil injection motor to rotate simultaneously.

[0018] Preferably, it further includes:

[0019] An oil injection pressure detection member for detecting the oil injection pressure of the oil injection pipe;

[0020] An oil drainage pressure detection member for detecting the oil drainage pressure of the oil drainage pipe;

[0021] When the oil injection pressure detection member detects that the oil injection pressure exceeds the maximum oil injection pressure, the controller is used to control the oil injection motor to stop rotating according to the signal fed back by the oil injection pressure detection member;

[0022] When the oil drainage pressure detection member detects that the oil drainage pressure is lower than the minimum oil drainage pressure, the controller is used to control the oil drainage motor to stop rotating according to the signal fed back by the oil drainage pressure detection member;

[0023] When the oil injection pressure is less than the maximum oil injection pressure and the oil drainage pressure is greater than the minimum oil drainage pressure, the controller is used to determine whether the actual pressure difference between the oil injection pressure and the oil drainage pressure is within the set pressure difference range. If not, the power of the oil injection motor and the oil drainage motor is respectively adjusted according to the signals fed back by the oil injection pressure detection member and the oil drainage pressure detection member at the same time;

[0024] When the oil injection pressure detection member detects that the oil injection pressure is lower than the set oil injection pressure, the controller is used to increase the power of the oil injection motor according to the signal fed back by the oil injection pressure detection member;

[0025] When the oil injection pressure detection member detects that the oil injection pressure is between the set oil injection pressure and the maximum oil injection pressure, the controller is used to reduce the power of the oil injection motor according to the signal fed back by the oil injection pressure detection member;

[0026] When the oil drainage pressure detection component detects that the oil drainage pressure is between the minimum oil drainage pressure and the set oil drainage pressure, the controller is used to increase the power of the oil drainage motor according to the signal fed back by the oil drainage pressure detection component;

[0027] When the oil drainage pressure detection component detects that the oil drainage pressure is higher than the set oil drainage pressure, the controller is used to decrease the power of the oil drainage motor according to the signal fed back by the oil drainage pressure detection component.

[0028] Preferably, it further includes:

[0029] An oil injection speed detection component, which is used to detect the rotation speed of the oil injection motor;

[0030] An oil drainage speed detection component, which is used to detect the rotation speed of the oil drainage motor;

[0031] When the oil injection speed detection component detects that the rotation speed of the oil injection motor is zero and the oil drainage speed detection component detects that the rotation speed of the oil drainage motor is zero, the controller is used to control the main drive motor to rotate according to the signals fed back by the oil injection speed detection component and the oil drainage speed detection component.

[0032] Preferably, it further includes:

[0033] A proximity detection component, which is used to detect whether the oil injection hole is aligned with the gap;

[0034] A stop counter, which is used to record the number of stops of the bearing;

[0035] When the proximity detection component detects that the oil injection hole is not aligned with the gap, the controller is used to control the main drive motor to rotate at a preset speed according to the signal fed back by the proximity detection component;

[0036] When the proximity detection component detects that the oil injection hole is aligned with the gap, the controller is used to control the main drive motor to stop rotating according to the signal fed back by the proximity detection component, and control the oil drainage motor and the oil injection motor to rotate simultaneously;

[0037] When the number of stops recorded by the stop counter exceeds the set number of stops, the controller is used to control both the oil injection motor and the oil drainage motor to stop rotating according to the signal fed back by the stop counter.

[0038] Preferably, it further includes:

[0039] An oil injection flow detection component, which is used to detect the oil injection flow of the oil injection pipe;

[0040] An oil drainage flow detection component, which is used to detect the oil drainage flow of the oil drainage pipe;

[0041] An auxiliary pipe, which is arranged in parallel with the oil injection pipe;

[0042] The auxiliary reversing valve is arranged on the auxiliary pipe and is used to control the on-off of the auxiliary pipe;

[0043] When the oil injection flow detection component detects that the oil injection flow is not within the set oil injection flow range, the controller is used to adjust the power of the oil injection motor according to the signal fed back by the oil injection flow detection component, and control the auxiliary reversing valve to switch to the first position, and only the oil injection pipe injects oil into the oil injection hole;

[0044] When the oil injection flow detection component detects that the oil injection flow does not reach the maximum oil injection flow, the controller is used to increase the power of the oil injection motor to the maximum oil injection power according to the signal fed back by the oil injection flow detection component, and control the auxiliary reversing valve to switch to the second position, and the oil injection pipe and the auxiliary pipe inject oil into the oil injection hole at the same time;

[0045] When the oil discharge flow detection component detects that the oil discharge flow is not within the set oil discharge flow range, the controller is used to adjust the power of the oil discharge motor according to the signal fed back by the oil discharge flow detection component.

[0046] The present invention also provides a rail transit vehicle, including the above-mentioned axle box lubrication system.

[0047] Compared with the background art, the axle box lubrication system provided by the present invention includes a bearing, an oil injection pipe and an oil discharge pipe. A plurality of structural holes are provided on the outer ring of the bearing. The structural holes include an oil injection hole and an oil discharge hole. The oil injection hole is connected to the oil injection pipe, and the oil discharge hole is connected to the oil discharge pipe; an oil injection pump is provided on the oil injection pipe, and an oil discharge pump is provided on the oil discharge pipe.

[0048] Since the included angle between the oil injection hole and the oil discharge hole is an integer multiple of the included angle between adjacent rollers, when the bearing rotates a set angle, the oil injection hole and the oil discharge hole are respectively radially opposite to the gaps between adjacent rollers. When oil discharge is required, start the oil discharge pump, and the oil discharge pump draws out the waste grease from the gap between adjacent rollers through the oil discharge pipe; after the waste grease is drawn out, new grease needs to be injected. Start the oil injection pump, and the oil injection pump injects new grease into the gap between adjacent rollers through the oil injection pipe; so on and so forth in a cycle until the bearing rotates one circle, and the lubricating grease in the bearing can be replaced. The entire replacement process does not require disassembling the axle box, and the replacement is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. 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.

[0050] Figure 1 It is an assembly drawing of the axle box and the oil injection pipe of the axle box lubrication system provided by a specific embodiment of the present invention;

[0051] Figure 2 is Figure 1 the exploded view of;

[0052] Figure 3 is the schematic diagram of the axle box lubrication system provided by a specific embodiment of the present invention;

[0053] Figure 4 is the hydraulic schematic diagram of the axle box lubrication system provided by a specific embodiment of the present invention;

[0054] Figure 5 is Figure 3 the assembly schematic diagram of the bearing and the oil injection pipe in;

[0055] Figure 6 is Figure 5 the partial enlarged view of A in.

[0056] The reference numerals are as follows:

[0057] bearing 10, oil injection pipe 11, oil injection pump 12, oil discharge pipe 13, oil discharge pump 14, axle box 15, oil discharge motor 16, oil injection motor 17, oil injection pressure detection part 18, oil discharge pressure detection part 19, oil injection flow detection part 20, oil discharge flow detection part 21, auxiliary pipe 22, auxiliary reversing valve 23, oil tank 24, overflow pipe 25 and overflow valve 26;

[0058] outer ring 100, structural hole 101 and roller 102;

[0059] oil injection hole 1011 and oil discharge hole 1012;

[0060] deflector head 111;

[0061] deflection hole 1111, shunt hole 1112 and limit flange 1113;

[0062] upper box body 151 and lower box body 152;

[0063] upper cover 1511. Specific embodiments

[0064] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with 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 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.

[0065] In order to enable those in the technical field to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0066] An embodiment of the present invention discloses an axle box lubrication system, as shown in the appendix Figures 2 to 4 As shown, it includes a bearing 10, an oil injection pipe 11 and an oil drain pipe 13. The bearing 10 is specifically a roller bearing, including an outer ring 100, an inner ring and a number of rollers 102 arranged between the outer ring 100 and the inner ring. All the rollers 102 are divided into two rows. The outer ring 100 of the bearing 10 is provided with a number of structural holes 101, and all the structural holes 101 are evenly distributed along the circumferential direction of the outer ring 100. The structural holes 101 include an oil injection hole 1011 and an oil drain hole 1012, and the included angle between the oil injection hole 1011 and the oil drain hole 1012 is an integer multiple of the included angle between two adjacent rollers 102 of the bearing 10. As a preferred embodiment, the included angle between two adjacent rollers 102 is 20°, the included angle between the oil injection hole 1011 and the oil drain hole 1012 is 140°, and the included angle between the oil injection hole 1011 and the oil drain hole 1012 is 7 times the included angle between two adjacent rollers 102.

[0067] One end of the oil injection pipe 11 is communicated with the oil injection hole 1011, and the other end is communicated with an oil tank 24. The oil injection pipe 11 is provided with an oil injection pump 12, and the oil injection pump 12 is used to pump new grease in the oil tank 24 into the oil injection hole 1011. One end of the oil drain pipe 13 is communicated with the oil drain hole 1012, and the other end is communicated with the oil tank 24. The oil drain pipe 13 is provided with an oil drain pump 14, and the oil drain pump 14 is used to pump the waste grease in the bearing 10 into the oil tank 24. It should be noted that for a single gap between two adjacent rollers 102, the waste grease needs to be drained first before new grease can be injected to avoid contamination of the new grease and ensure the replacement quality; for the entire bearing 10, the waste grease is drained and new grease is injected simultaneously for different gaps, the actions are continuous, saving the grease replacement time and improving the replacement efficiency.

[0068] When the bearing 10 rotates a set angle, the oil injection hole 1011 and the oil drain hole 1012 are respectively radially opposite to the gaps between two adjacent rollers 102. The radial direction in the text refers to the direction parallel to the radius of the bearing 10. When oil drainage is required, the oil drain pump 14 is started, and the oil drain pump 14 pumps the waste grease out of the gap between two adjacent rollers 102 through the oil drain pipe 13; after the waste grease is pumped out, when new grease needs to be injected, the oil injection pump 12 is started, and the oil injection pump 12 injects the new grease into the gap between two adjacent rollers 102 through the oil injection pipe 11; so on and so forth in an alternating cycle until the bearing 10 rotates one circle, and the lubricating grease in the bearing 10 can be replaced. The entire replacement process does not require disassembling the axle box 15, making the replacement more convenient.

[0069] The axle box lubrication system further includes an axle box 15, as shown in the appendix Figures 1 to 2As shown, the axle box 15 includes an upper box body 151 and a lower box body 152 which are detachably connected and distributed vertically. When replacing the grease, it is convenient to remove the lower box body 152 to expose the lower half of the bearing 10. The upper box body 151 is provided with an embedding hole, and an upper cover 1511 is detachably arranged in the embedding hole for covering the embedding hole. It should be noted that the upper cover 1511 is installed in an area on the top of the upper box body 151 that is not covered by a series of springs to avoid interference. The end of the grease injection pipe 11 is fixedly provided with a grease gun, and the grease gun passes through the upper cover 1511 and extends to the embedding hole. When the bearing 10 rotates by a set angle, the grease injection hole 1011 communicates with the grease gun along the radial direction of the bearing 10, so that the new grease in the grease injection pipe 11 is injected into the grease injection hole 1011 through the grease gun. That is to say, the grease injection pipe 11 is directly installed on the upper box body 151. When replacing the grease, there is no need to remove the upper box body 151, realizing on-line grease replacement and making the operation more convenient.

[0070] As shown in the appendix Figure 5 and 6 As shown, a diversion head 111 is installed at the head of the grease gun. The diversion head 111 is inserted into the grease injection hole 1011 and extends into the gap between two adjacent rollers 102, so that the new grease is injected into the gap between two adjacent rollers 102 under the guidance of the diversion head 111. A diversion hole 1111 is formed in the center of the diversion head 111, and a plurality of diversion holes 1112 are provided at one end of the diversion head 111 inserted into the gap. All the diversion holes 1112 communicate with the diversion hole 1111, so that the new grease is directed to flow into the gap of the bearing 10 under the guidance of the diversion holes 1112. All the diversion holes 1112 are distributed in a cross shape, so that the new grease is injected into the bearing 10 in four different directions at the same time, increasing the grease injection area, shortening the grease injection time, improving the grease injection efficiency, and improving the grease injection quality. Of course, the distribution mode of the diversion holes 1112 is not limited to the cross shape. For example, it can also be a linear shape, which is specifically adjusted according to the type of the bearing 10.

[0071] The diversion head 111 and the grease injection hole 1011 are connected by threads, which is convenient for disassembling and assembling the diversion head 111 and reduces the maintenance difficulty. The end of the diversion head 111 extends beyond the grease injection hole 1011 to prevent the grease injection hole 1011 from blocking the diversion holes 1112 and ensure that the diversion holes 1112 are located in the gap between two adjacent rollers 102. The grease injection hole 1011 is provided with a limiting step, and the diversion head 111 is provided with a limiting flange 1113. The limiting flange 1113 and the limiting step are matched along the radial direction of the bearing 10 to limit the position of the diversion head 111 in the grease injection hole 1011 along the radial direction of the bearing 10, avoiding the diversion head 111 from being not properly installed due to too shallow insertion depth, and also avoiding uneven grease injection caused by too deep insertion depth of the diversion head 111.

[0072] The axle box lubrication system further includes a rotation angle detector, a main drive motor, an oil drain motor 16, and an oil injection motor 17. Among them, the rotation angle detector is used to detect the rotation angle of the bearing 10, specifically, it can be an encoder. The output end of the main drive motor is equipped with a drive shaft, and the drive shaft is in interference fit with the inner ring of the bearing 10 to drive the bearing 10 to rotate. The oil drain motor 16 is connected to the oil drain pump 14 to drive the oil drain pump 14 to rotate. The oil injection motor 17 is connected to the oil injection pump 12 to drive the oil injection pump 12 to rotate.

[0073] When the rotation angle detector detects that the bearing 10 rotates by a set angle, it means that the oil injection gap between two adjacent rollers 102 is aligned with the oil injection hole 1011, and the oil drain gap between two adjacent rollers 102 is aligned with the oil drain hole 1012. The controller receives the signal fed back by the rotation angle detector, makes a judgment and processing, and then sends a signal to the oil drain motor 16, the oil injection motor 17, and the main drive motor to control the main drive motor to stop rotating, ensuring that the oil injection hole 1011 and the oil drain hole 1012 are respectively aligned with the oil injection gap and the oil drain gap; at the same time, the oil drain motor and the oil injection motor 17 are controlled to rotate simultaneously, the oil injection pump 12 and the oil drain pump 14 rotate simultaneously, the oil injection pipe 11 fills the oil injection gap with new grease through the oil injection hole 1011, and the oil drain pipe 13 extracts the waste grease from the oil drain gap through the oil drain hole 1012, realizing the automatic stop, automatic oil injection, and automatic oil drainage of the bearing 10. Each action is carried out continuously, the replacement time is shortened, and the replacement efficiency is higher.

[0074] As shown Figure 4 in the figure, the axle box lubrication system further includes an oil injection pressure detector 18 and an oil drain pressure detector 19. The oil injection pressure detector 18 is arranged on the oil injection pipe 11 to detect the oil injection pressure of the oil injection pipe 11. The oil drain pressure detector 19 is arranged on the oil drain pipe 13 to detect the oil drain pressure of the oil drain pipe 13. Both the oil injection pressure detector 18 and the oil drain pressure detector 19 can be pressure sensors, but are not limited thereto.

[0075] When the oil injection pressure detector 18 detects that the oil injection pressure exceeds the maximum oil injection pressure, it means that the oil injection gap is filled with grease. The oil injection pressure detector 18 feeds back a signal to the controller. After being judged and processed by the controller, a signal is sent to the oil injection motor 17 to control the oil injection motor 17 to stop automatically, the oil injection pump 12 runs idly, and the oil injection pipe 11 stops injecting oil automatically.

[0076] When the oil drain pressure detector 19 detects that the oil drain pressure is lower than the minimum oil drain pressure, it means that the oil drain gap has been drained of grease. The oil drain pressure detector 19 feeds back a signal to the controller. After being judged and processed by the controller, a signal is sent to the oil drain motor 16 to control the oil drain motor 16 to stop automatically, the oil drain pump 14 runs idly, and the oil drain pipe 13 stops draining oil automatically.

[0077] When the oil injection pressure is less than the maximum oil injection pressure and the oil discharge pressure is greater than the minimum oil discharge pressure, that is, during the process of injecting and discharging grease, the controller continuously judges whether the actual pressure difference between the oil injection pressure and the oil discharge pressure is within the set pressure difference range. If so, it means that a stable pressure difference is maintained between the oil injection pipe 11 and the oil discharge pipe 13, ensuring smooth oil injection and discharge; if not, it means that the pressure difference between the oil injection pipe 11 and the oil discharge pipe 13 is unstable. The oil injection pressure detection component 18 and the oil discharge pressure detection component 19 both feedback signals to the controller, and the controller respectively adjusts the powers of the oil injection motor 17 and the oil discharge motor 16 until the pressure difference between the oil injection pipe 11 and the oil discharge pipe 13 reaches the set pressure difference, realizing automatic pressure difference adjustment, achieving efficient oil injection and discharge, and higher replacement efficiency. The set pressure difference in the text is the optimal pressure difference between the oil injection pipe 11 and the oil outlet pipe. Specifically, when the pressure difference is less than the set pressure difference, increase the power of the oil injection motor 17 and / or decrease the power of the oil discharge motor 16; conversely, when the pressure difference is greater than the set pressure difference, decrease the power of the oil injection motor 17 and / or increase the power of the oil discharge motor 16.

[0078] When the oil injection pressure detection component 18 detects that the oil injection pressure is lower than the set oil injection pressure, it means that the pressure of the oil injection pipe 11 is too low. The oil injection pressure detection component 18 feedbacks a signal to the controller. After being judged and processed by the controller, a signal is sent to the oil injection motor 17 to increase the power of the oil injection motor 17, increase the pressure of the oil injection pipe 11, and improve the oil injection efficiency.

[0079] When the oil injection pressure detection component 18 detects that the oil injection pressure is between the set oil injection pressure and the maximum oil injection pressure, it means that the pressure of the oil injection pipe 11 is too high. The oil injection pressure detection component 18 feedbacks a signal to the controller. After being judged and processed by the controller, a signal is sent to the oil injection motor 17 to decrease the power of the oil injection motor 17, decrease the pressure of the oil injection pipe 11, prevent the new grease from splashing due to excessive pressure in the gap to be oil-injected, reduce grease loss, and ensure that the injected new grease is evenly distributed, improving the oil injection quality.

[0080] When the oil discharge pressure detection component 19 detects that the oil discharge pressure is between the minimum oil discharge pressure and the set oil discharge pressure, it means that the pressure of the oil discharge pipe 13 is too low. The oil discharge pressure detection component 19 feedbacks a signal to the controller. After being judged and processed by the controller, a signal is sent to the oil discharge motor 16 to increase the power of the oil discharge motor 16, increase the pressure of the oil discharge pipe 13, and improve the oil discharge efficiency.

[0081] When the oil discharge pressure detection component 19 detects that the oil discharge pressure is higher than the set oil discharge pressure, it means that the pressure at the oil discharge end is too high. The oil discharge pressure detection component 19 feedbacks a signal to the controller. After being judged and processed by the controller, a signal is sent to the oil discharge motor 16 to decrease the power of the oil discharge motor 16, preventing the newly injected grease from being accidentally pumped out due to excessive oil discharge pressure.

[0082] The axle box lubrication system further includes an oil injection speed detector and an oil drainage speed detector. The oil injection speed detector is used to detect the rotation speed of the oil injection motor 17, and the oil drainage speed detector is used to detect the rotation speed of the oil drainage motor 16. Both the oil injection speed detector and the oil drainage speed detector can be encoders, but are not limited thereto.

[0083] When the oil injection speed detector detects that the rotation speed of the oil injection motor 17 is zero and the oil drainage speed detector detects that the rotation speed of the oil drainage motor 16 is zero, that is, when both the oil injection motor 17 and the oil drainage motor 16 stop rotating, it means that after the bearing 10 rotates a set angle, the oil injection pipe 11 completes oil injection and the oil drainage pipe 13 completes oil drainage. The oil injection speed detector and the oil drainage speed detector simultaneously feed back signals to the controller. After control processing, a signal is sent to the main drive motor to control the main drive motor to rotate automatically, so that the bearing 10 automatically rotates through a preset rotation angle, preparing for grease injection and drainage for the next gap, automatically adjusting the angle of the bearing 10, with a higher degree of automation and an improved replacement efficiency.

[0084] The axle box lubrication system further includes a proximity detector and a stop counter. The proximity detector is used to detect whether the oil injection hole 1011 is aligned with the gap. The proximity detector can specifically be a distance sensor, but is not limited thereto. The stop counter is used to record the number of stops of the bearing 10.

[0085] When the proximity detector detects that the oil injection hole 1011 is not aligned with the gap, the proximity detector feeds back a signal to the controller. After the controller makes a judgment and processing, a signal is sent to the main drive motor to control the main drive motor to rotate at a preset speed, that is, to control the main drive motor to rotate at a low speed, so as to finely adjust the rotation angle of the main drive motor until the oil injection hole 1011 is aligned with the gap to be oil-injected, precisely adjusting the rotation angle of the main drive motor in a closed-loop control manner, with a high control precision to ensure that the new grease is completely injected into the gap to be oil-injected.

[0086] When the proximity detector detects that the oil injection hole 1011 is aligned with the gap, the proximity detector feeds back a signal to the controller. After the controller makes a judgment and processing, a signal is sent to the main drive motor to control the main drive motor to stop automatically, and control the oil drainage motor 16 and the oil injection motor 17 to rotate simultaneously, so that the oil injection pipe 11 injects oil automatically and the oil drainage pipe 13 drains oil automatically, with a high control precision and a higher replacement efficiency.

[0087] When the number of stops recorded by the stop counter exceeds the set number of stops, it means that the bearing 10 has rotated one circle and all gaps have completed oil injection. The stop counter feeds back a signal to the controller. After the controller makes a judgment and processing, a signal is sent to the oil injection motor 17 and the oil drainage motor 16 to control the oil injection motor 17 and the oil drainage motor 16 to stop rotating, the oil injection pipe 11 stops injecting oil, and the oil drainage pipe 13 stops draining oil, realizing full automation and having a higher replacement efficiency.

[0088] The axle box lubrication system further includes an oil injection flow rate detection component 20, an oil drainage flow rate detection component 21, an auxiliary pipe 22, and an auxiliary reversing valve 23. The oil injection flow rate detection component 20 is used to detect the oil injection flow rate of the oil injection pipe 11, and the oil drainage flow rate detection component 21 is used to detect the oil drainage flow rate of the oil drainage pipe 13. Both the oil injection flow rate detection component 20 and the oil drainage flow rate detection component 21 can be flow sensors. The auxiliary pipe 22 is arranged in parallel with the oil injection pipe 11, and the auxiliary reversing valve 23 is arranged on the auxiliary pipe 22 and is used to control the on-off of the auxiliary pipe 22. The auxiliary reversing valve 23 is specifically a two-position two-way electromagnetic reversing valve.

[0089] When the oil injection flow rate detection component 20 detects that the oil injection flow rate is not within the set oil injection flow rate range, the oil injection flow rate detection component 20 feeds back a signal to the controller. After judgment and processing by the controller, a signal is sent to the oil injection motor 17 to adjust the power of the oil injection motor 17, and at the same time, the auxiliary reversing valve 23 is controlled to switch to the first position, and only the oil injection pipe 11 injects oil into the oil injection hole 1011 to ensure efficient and stable oil injection. Specifically, when the oil injection flow rate is lower than the minimum value of the set oil injection flow rate range, the power of the oil injection motor 17 is increased; when the oil injection flow rate is higher than the maximum value of the set oil injection flow rate range, the power of the oil injection motor 17 is decreased.

[0090] When the oil injection flow rate detection component 20 detects that the oil injection flow rate has not reached the maximum oil injection flow rate, it means that the oil injection flow rate through the oil injection pipe 11 is low. The oil injection flow rate detection component 20 sends a signal to the controller. After judgment and processing by the controller, a signal is sent to the oil injection motor 17 to increase it to the maximum oil injection power, and the auxiliary reversing valve 23 is controlled to switch to the second position, and the oil injection pipe 11 and the auxiliary pipe 22 inject oil into the oil injection hole 1011 at the same time, and the oil injection volume automatically increases, improving the oil injection efficiency.

[0091] When the oil drainage flow rate detection component 21 detects that the oil drainage flow rate is not within the set oil drainage flow rate range, the oil drainage flow rate detection component 21 feeds back a signal to the controller. After judgment and processing by the controller, a signal is sent to the oil drainage motor 16 to adjust the power of the oil drainage motor 16 to ensure efficient and stable oil drainage. Specifically, when the oil drainage flow rate is lower than the minimum value of the set oil drainage flow rate range, the power of the oil drainage motor 16 is increased; when the oil drainage flow rate is higher than the maximum value of the set oil drainage flow rate range, the power of the oil drainage motor 16 is decreased.

[0092] The axle box lubrication system further includes an overflow pipe 25 connected between the fuel tank 24 and the oil injection pipe 11. The overflow pipe 25 is provided with an overflow valve 26. When the oil injection pressure of the oil injection pipe 11 is higher than the safety pressure of the overflow valve 26, the overflow valve 26 opens, and the new grease in the oil injection pipe 11 overflows to the overflow pipe 25, reducing the oil injection pressure of the oil injection pipe 11 and improving the safety of the whole system.

[0093] In addition, one end of the oil injection pipe 11 close to the fuel tank 24 is provided with a filter and an oil injection check valve. The filter is used to filter impurities in the new grease, and the oil injection check valve is used to prevent the new grease in the oil injection pipe 11 from flowing back into the fuel tank 24. The oil discharge pipe 13 is provided with an oil discharge check valve to prevent the grease in the fuel tank 24 from flowing back into the oil discharge pipe 13. The overflow pipe 25 is also provided with an overflow check valve to prevent the grease in the fuel tank 24 from flowing back into the overflow pipe 25.

[0094] An embodiment of the present invention also discloses a rail transit vehicle, including the above axle box lubrication system, which is used to replace the grease of the bearings 10 of the axle boxes 15 online, and the operation is relatively convenient.

[0095] It should be noted that in this specification, relational terms such as first and second are only used to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0096] Specific examples are used in this article to elaborate on the principles and implementation manners of the present invention. The description of the above embodiments is 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 in this technical field, 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 claims of the present invention.

Claims

1. An axle box lubrication system, characterized in that: include: A bearing (10), wherein an outer ring (100) of the bearing (10) is provided with a plurality of structural holes (101), the structural holes (101) comprising an oil injection hole (1011) and an oil discharge hole (1012), and an angle between the oil injection hole (1011) and the oil discharge hole (1012) is an integer multiple of an angle between two adjacent rollers (102) of the bearing (10); An oil injection pipe (11), the oil injection pipe (11) being in communication with the oil injection hole (1011), and the oil injection pipe (11) being provided with an oil injection pump (12); An oil drain pipe (13), the oil drain pipe (13) being in communication with the oil drain hole (1012), and the oil drain pipe (13) being provided with an oil drain pump (14); When the bearing (10) rotates at a set angle, the oil injection hole (1011) and the oil discharge hole (1012) are radially opposite to the gap between the two adjacent rollers (102).

2. The axle box lubrication system according to claim 1, characterized in that: The invention also comprises an axle box (15), wherein the axle box (15) comprises an upper box body (151) and a lower box body (152) which are detachably connected and arranged in an upper and lower manner; the upper box body (151) is provided with an embedding hole, and the embedding hole is detachably provided with an upper blocking cover (1511); an oil filling gun is fixedly provided at the end of the oil filling pipe (11), and the oil filling gun is passed through the upper blocking cover (1511) and extends to the embedding hole; when the bearing (10) rotates to the set angle, the oil filling hole (1011) and the oil filling gun are connected in the radial direction of the bearing (10).

3. The axle box lubrication system according to claim 2, characterized in that: The head of the oil injection gun is provided with a flow guide head (111), the flow guide head (111) is inserted into the oil injection hole (1011) and extends into the gap between two adjacent rollers (102); a flow guide hole (1111) is formed at the center of the flow guide head (111), and one end of the flow guide head (111) inserted into the gap is provided with a plurality of flow diversion holes (1112), all of the flow diversion holes (1112) are distributed in a cross shape and are all connected to the flow guide hole (1111).

4. The axle box lubrication system according to claim 3, characterized in that: The oil injection hole (1011) is provided with a limiting step, and the guide head (111) is provided with a limiting flange (1113), and the limiting flange (1113) matches the limiting step along the radial direction of the bearing (10).

5. The axle box lubrication system according to claim 4, characterized in that: Also includes: A rotation angle detection member, the rotation angle detection member being used to detect the rotation angle of the bearing (10); A main drive motor, the main drive motor being connected to the bearing (10); An oil discharge motor (16), the oil discharge motor (16) being connected to the oil discharge pump (14); An oil injection motor (17), the oil injection motor (17) being connected to the oil injection pump (12); When the rotation angle detection component detects that the bearing (10) rotates to the set angle, the controller is used to control the main drive motor to stop rotating according to the signal fed back by the rotation angle detection component, and to control the oil discharge motor (16) and the oil injection motor (17) to rotate simultaneously.

6. The axle box lubrication system according to claim 5, characterized in that: Also includes: An oil injection pressure detection component (18), the oil injection pressure detection component (18) being used to detect the oil injection pressure of the oil injection pipe (11); an oil discharge pressure detection element (19), the oil discharge pressure detection element (19) being used to detect the oil discharge pressure of the oil discharge pipe (13); When the oil injection pressure detection component (18) detects that the oil injection pressure exceeds the maximum oil injection pressure, the controller is used to control the oil injection motor (17) to stop rotating according to the signal fed back by the oil injection pressure detection component (18); When the oil discharge pressure detection component (19) detects that the oil discharge pressure is lower than the minimum oil discharge pressure, the controller is used to control the oil discharge motor (16) to stop rotating according to a signal fed back by the oil discharge pressure detection component (19); When the oil injection pressure is less than the maximum oil injection pressure and the oil discharge pressure is greater than the minimum oil discharge pressure, the controller is used to determine whether the actual pressure difference between the oil injection pressure and the oil discharge pressure is within a set pressure difference range, and if not, the power of the oil injection motor (17) and the oil discharge motor (16) are respectively adjusted according to the signals fed back simultaneously by the oil injection pressure detection component (18) and the oil discharge pressure detection component (19); When the oil injection pressure detection component (18) detects that the oil injection pressure is lower than a set oil injection pressure, the controller is used to increase the power of the oil injection motor (17) according to a signal fed back by the oil injection pressure detection component (18); When the oil injection pressure detection component (18) detects that the oil injection pressure is between the set oil injection pressure and the maximum oil injection pressure, the controller is used to reduce the power of the oil injection motor (17) according to the signal fed back by the oil injection pressure detection component (18); When the oil discharge pressure detection element (19) detects that the oil discharge pressure is between the minimum oil discharge pressure and the set oil discharge pressure, the controller is used to increase the power of the oil discharge motor (16) according to the signal fed back by the oil discharge pressure detection element (19); When the oil discharge pressure detection component (19) detects that the oil discharge pressure is higher than the set oil discharge pressure, the controller is used to reduce the power of the oil discharge motor (16) according to the signal fed back by the oil discharge pressure detection component (19).

7. The axle box lubrication system according to claim 6, characterized in that: Also includes: An oil injection speed detection component, the oil injection speed detection component is used to detect the speed of the oil injection motor (17); An oil discharge speed detection component, the oil discharge speed detection component is used to detect the speed of the oil discharge motor (16); When the oil injection speed detection component detects that the speed of the oil injection motor (17) is zero, and the oil discharge speed detection component detects that the speed of the oil discharge motor (16) is zero, the controller is used to control the rotation of the main drive motor according to the feedback signals of the oil injection speed detection component and the oil discharge speed detection component.

8. The axle box lubrication system according to claim 7, characterized in that: Also includes: A proximity detection member, the proximity detection member being used to detect whether the oil injection hole (1011) is aligned with the gap; A stall counter, the stall counter being used to record the number of times the bearing (10) stops; When the proximity detection member detects that the oil filling hole (1011) is not aligned with the gap, the controller is used to control the main drive motor to rotate at a preset speed according to a signal fed back by the proximity detection member; When the proximity detection member detects that the oil injection hole (1011) is aligned with the gap, the controller is used to control the main drive motor to stop rotating according to a signal fed back by the proximity detection member, and to control the oil discharge motor (16) and the oil injection motor (17) to rotate simultaneously; When the number of stops recorded by the stop counter exceeds a set number of stops, the controller is used to control both the oil injection motor (17) and the oil discharge motor (16) to stop according to a signal fed back by the stop counter.

9. The axle box lubrication system according to claim 8, characterized in that: Also includes: An oil injection flow rate detection component (20), the oil injection flow rate detection component (20) being used to detect the oil injection flow rate of the oil injection pipe (11); An oil discharge flow rate detection element (21), the oil discharge flow rate detection element (21) being used to detect the oil discharge flow rate of the oil discharge pipe (13); an auxiliary pipe (22), the auxiliary pipe (22) being arranged in parallel with the oil injection pipe (11); an auxiliary reversing valve (23), the auxiliary reversing valve (23) being arranged on the auxiliary pipe (22) and used for controlling the opening and closing of the auxiliary pipe (22); When the oil injection flow rate detection component (20) detects that the oil injection flow rate is not within a set oil injection flow rate range, the controller is used to adjust the power of the oil injection motor (17) according to the signal fed back by the oil injection flow rate detection component (20), and control the auxiliary reversing valve (23) to switch to the first position, so that only the oil injection pipe (11) injects oil into the oil injection hole (1011); When the oil injection flow rate detection component (20) detects that the oil injection flow rate has not reached the maximum oil injection flow rate, the controller is used to increase the power of the oil injection motor (17) to the maximum oil injection power according to the signal fed back by the oil injection flow rate detection component (20), and control the auxiliary reversing valve (23) to switch to the second position, so that the oil injection pipe (11) and the auxiliary pipe (22) simultaneously inject oil into the oil injection hole (1011); When the oil discharge flow detection element (21) detects that the oil discharge flow is not within a set oil discharge flow range, the controller is used to adjust the power of the oil discharge motor (16) according to a signal fed back by the oil discharge flow detection element (21).

10. A rail transit vehicle, characterized in that: An axle box lubrication system comprising any one of claims 1 to 9.

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