Rail vehicle dry flange lubrication device and intermittent flange lubrication method

Abstract

The application discloses a kind of rail vehicle dry rim lubricating device and intermittent rim lubricating method, it includes bogie frame, wheel and lubricating block, the bogie frame is installed primary cylinder, the primary cylinder is installed primary piston in, the primary piston is fixedly connected with the one end of secondary cylinder, the other end of secondary cylinder is connected lubricating block encapsulation box, the secondary cylinder is installed secondary piston in, the lubricating block encapsulation box is installed the lubricating block, the primary cylinder drives the secondary cylinder and lubricating block encapsulation box approach or separate from wheel rim, the secondary cylinder drives the lubricating block and resists or separates from wheel rim.The primary electromagnetic valve and primary cylinder of the present application control dry lubricating device as a whole to approach wheel rim, then the secondary electromagnetic valve is intermittently controlled to the secondary cylinder to realize intermittent lubrication wheel rim, while guaranteeing the lubricating effect of wheel rim, reduce the waste of lubricating block.

Description

Technical Field

[0001] The invention relates to rail transit vehicle wheel rim lubrication, in particular to a rail vehicle dry wheel rim lubrication device and an intermittent wheel rim lubrication method. Background Art

[0002] Train wheel flange lubrication plays a very critical role in the normal operation of the train. It not only directly reduces the wear between the wheel flange and the rail, reduces vibration and noise, but also improves the traction efficiency and economic benefits of the train: during the operation of the train, the wheel flange lubrication device applies lubricant to the space between the wheel flange and the rail to form a protective film, which reduces friction, reduces energy consumption, extends the life of the wheel and rail, and reduces the maintenance work of the vehicle and track.

[0003] At present, wheel rim lubrication mainly adopts two methods: dry (solid) lubrication and wet (liquid) lubrication. Among them, the dry wheel rim lubrication system generally consists of a lubrication device and a solid lubricating block. Figure 1 As shown, the dry wheel flange lubrication device A is fixedly mounted on the bogie frame B. A constant-force spring pushes the lubrication block from the back, keeping it in constant contact with the wheel flange C. Lubricant is applied to the wheel flange C, forming a dry lubrication film that lubricates the wheel flange and rail. Due to the long-term operation of trains, the lubrication block remains in constant contact with the wheel. Long-term wear consumes a large amount of the lubrication block, resulting in reduced utilization and increased costs. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that the existing mechanical dry wheel rim lubrication device has a large consumption of lubricating blocks and a waste of resources. The present invention provides an intermittently operating rail vehicle dry wheel rim lubrication device and an intermittent wheel rim lubrication method.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A rail vehicle dry wheel rim lubrication device includes a bogie frame, a wheel and a lubricating block, characterized in that: a first-level cylinder is installed on the bogie frame, a first-level piston is installed in the first-level cylinder, the first-level piston is connected to one end of a second-level cylinder, the other end of the second-level cylinder is connected to a lubricating block packaging box, a second-level piston is installed in the second-level cylinder, the lubricating block is installed in the lubricating block packaging box, the first-level piston drives the second-level cylinder and the lubricating block packaging box to approach or separate from the wheel rim, and the second-level cylinder drives the lubricating block to press against or separate from the wheel rim.

[0007] The rail vehicle dry type wheel rim lubricating device drives the second cylinder and the lubricating block packaging box to approach or separate from the wheel rim through the first cylinder, and the second cylinder drives the lubricating block to abut against or separate from the wheel rim, so that the intermittent wheel rim lubricating operation can be automatically realized by controlling the first and second cylinders, and the lubricating block is reduced while the lubricating effect of the wheel rim is ensured.

[0008] Preferably, a first electromagnetic valve is installed at the medium input end of the first cylinder, and a second electromagnetic valve is installed at the medium input end of the second cylinder, so that the first cylinder can be automatically controlled through the first electromagnetic valve, and the second cylinder can be automatically controlled through the second electromagnetic valve.

[0009] Preferably, the control end of the first electromagnetic valve is connected with an intermediate relay, the control end of the second electromagnetic valve is connected with a first time relay and a second time relay, the intermediate relay is used to control the start and stop of the first electromagnetic valve, the first time relay and the second time relay are used to control the start and stop of the second electromagnetic valve, and a travel switch is installed at the end of the travel of the first piston, so that the first time relay is powered to start timing after the travel switch is triggered, the second electromagnetic valve is started after a delay time t1 is reached, the second piston pushes the lubricating block and abuts against the wheel rim, the second time relay is powered to start timing, and the second electromagnetic valve is closed after a delay time t2 is reached, and the second piston retreats. In this way, the first and second time relay control circuits can be used to set the action period and frequency of the lubricating block and the wheel rim, the travel switch is used as a trigger switch for the cycle operation of the lubricating block, the delay time t1 is the pause time of the cycle operation of the lubricating block, and the delay time t2 is the operation time of the cycle operation of the lubricating block, so as to reduce the consumption of the lubricating block in the lubricating process.

[0010] Preferably, a stop block is installed at the end of the travel of the first piston, so as to ensure that the lubricating block packaging box does not approach the wheel rim indefinitely, and a certain distance D is maintained between the two.

[0011] Preferably, a first spring for resetting the first piston is installed in the first cylinder, and a second spring for resetting the second piston is installed in the second cylinder, so as to facilitate the resetting of the first and second pistons.

[0012] Preferably, a pawl is installed on the inner wall of the lubricating block packaging box, a pawl spring is installed between the lubricating block packaging box and the pawl, and a tooth is arranged on the lubricating block, so that the pawl is clamped into the tooth of the lubricating block to form a cooperation, and the lubricating block is maintained in the original position of the lubricating block packaging box after the second piston of the second cylinder retreats.

[0013] Preferably, a start button for starting the first electromagnetic valve at any time and a stop button for stopping the first electromagnetic valve at any time are arranged in the driver's room of the vehicle, so as to facilitate the driver to lubricate the wheel rim according to needs.

[0014] Preferably, the curve detection output signal and the curve passing completion output signal of the vehicle central control system are connected to the control circuit of the intermediate relay, when the curve detection output signal Y1=1, the primary electromagnetic valve is started, when the curve passing completion output signal Y2=1, the primary electromagnetic valve is closed, so as to actively provide wheel rim lubrication when the vehicle passes through the curve.

[0015] Based on the same inventive concept, the application further provides an intermittent wheel rim lubrication method of the rail vehicle dry-type wheel rim lubrication device, which comprises:

[0016] A primary electromagnetic valve is installed at the medium input end of the primary cylinder, a secondary electromagnetic valve is installed at the medium input end of the secondary cylinder, the control end of the primary electromagnetic valve is connected to an intermediate relay, the control end of the secondary electromagnetic valve is connected to a first time relay and a second time relay, the intermediate relay is used for controlling the starting and closing of the primary electromagnetic valve, and the first time relay and the second time relay are used for controlling the starting and closing of the secondary electromagnetic valve.

[0017] A stop block and a stroke switch are installed at the stroke end of the primary piston;

[0018] The primary piston in the primary cylinder drives the secondary cylinder to the stroke end of the primary piston and triggers the stroke switch;

[0019] The first time relay is powered to start timing, after the timing reaches the delay time t1, the secondary electromagnetic valve is started, the secondary cylinder drives the lubricating block until the lubricating block abuts against the wheel rim to lubricate, at the same time when the secondary electromagnetic valve is started, the second time relay is powered to start timing, after the timing reaches the delay time t2, the secondary electromagnetic valve is closed, the secondary piston retreats, and the lubricating block is separated from the wheel rim, the first time relay is powered to start timing again, enters the next lubrication period of the lubricating block, and the process is repeated.

[0020] Preferably, a starting button for starting the primary electromagnetic valve at any time and a stopping button for stopping the primary electromagnetic valve at any time are arranged in the driver's room of the vehicle, and the curve detection output signal and the curve passing completion output signal of the vehicle central control system are connected to the control circuit of the intermediate relay, when the curve detection output signal Y1=1, the primary electromagnetic valve is started, and when the curve passing completion output signal Y2=1, the primary electromagnetic valve is closed.

[0021] The present invention utilizes a nested first-stage solenoid valve + first-stage cylinder and a second-stage solenoid valve + second-stage cylinder to control the approach and operation of the dry lubrication block with the wheel rim, respectively. The first and second time relays are used to control the frequency and period of the dry lubrication block's intermittent operation. The ratchet device (pawl + pawl spring + grinding teeth) cooperates with the lubrication block to ensure that the lubrication block does not retract after feeding. This design controls the contact between the lubrication block and the wheel rim in sections of the line requiring lubrication, ensuring lubrication effectiveness and maximizing lubrication functionality. In unnecessary sections of the line, the lubrication block does not contact the wheel rim, reducing unnecessary wear of the lubrication block material and improving lubrication block material utilization.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] (1) The present invention combines the curve detection signal of the central control system and the buttons (start button and stop button) in the driver's cab to remotely control the start and stop of the entire dry wheel rim lubrication device. Compared with the previous purely mechanical dry lubrication device, the present invention has a control system that can start or stop the lubrication device at any time. Through this design, the contact between the lubricating block and the wheel rim is controlled in the line section that needs lubrication, ensuring the lubrication effect and exerting the lubrication function. For unnecessary line sections, the lubricating block does not contact the wheel rim, reducing unnecessary wear of the lubricating block material and improving the utilization rate of the lubricating block material.

[0024] (2) The time relay control circuit of the present invention can set the action cycle and frequency of the lubricating block and the wheel rim, thereby reducing the consumption of the lubricating block during the lubrication process. Figure 4 As shown, KT1 controls the delayed start of the secondary solenoid valve 2, and KT2 controls the delayed close of the secondary solenoid valve 2. When the KT1 coil is energized, the timer begins counting. When the timing reaches t1, the KT1 delayed normally open contact closes, the KT2 coil and the secondary solenoid valve coil YV2 are energized simultaneously, and the lubricating block 11 presses forward against the wheel rim 12. At this time, the timer begins counting again. When the timing reaches t2, the KT2 delayed normally closed contact opens, the KT1 coil is de-energized, the KT1 delayed normally open contact opens, the secondary solenoid valve coil YV2 is de-energized, and the lubricating block 11 stops operating. In this way, the primary and secondary solenoid valves and the primary and secondary cylinders in the present invention are linked together to respectively execute the two processes of approaching and operating the dry lubricating block to the wheel rim. This graded operation can reduce the working stroke of the lubricating block, allowing the lubricating block package box to be close to the wheel but limited to a moderate distance, so that the lubricating block can quickly contact the wheel rim during operation.

[0025] (3) The present invention provides a stopper and a mechanical travel switch inside the first-stage cylinder, which not only limits the distance between the dry lubrication device as a whole and the wheel rim, but also serves as a trigger condition for the cyclic intermittent operation of the lubrication block.

[0026] (4) The invention sets a ratchet device (pawl + pawl spring + gear) between the lubricating block packaging box and the lubricating block, which ensures that the lubricating block maintains its original position in the lubricating block packaging box after the secondary piston of the secondary cylinder is retracted. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0028] Figure 1 It is a schematic diagram of the connection of the traditional dry rim lubricating device on the bogie.

[0029] Figure 2 It is a mechanical state diagram before the device of the present application is started.

[0030] Figure 3 It is a mechanical state diagram after the device of the present application is started.

[0031] Figure 4 It is an intermittent operation control electrical schematic diagram of the dry rim lubricating device of the present application.

[0032] In the figure: 1 - primary electromagnetic valve, 2 - secondary electromagnetic valve, 3 - primary cylinder, 4 - primary piston, 5 - bogie frame, 6 - stop block, 7 - first spring, 8 - secondary piston, 9 - second spring, 10 - spring baffle, 11 - lubricating block, 12 - wheel rim, 13 - pawl spring, 14 - gear, 15 - pawl, 16 - lubricating block packaging box, 17 - secondary cylinder;

[0033] FU1: dry fuse;

[0034] SB1: start button;

[0035] SB2: stop button;

[0036] SQA: travel switch, as a trigger switch for the lubricating block cycle period operation;

[0037] YV1: primary electromagnetic valve control coil;

[0038] YV2: secondary electromagnetic valve control coil;

[0039] Y1: curve detection output signal, when a curve in front is detected, Y1 output is 1, otherwise output is 0;

[0040] Y2: over curve completion output signal, when the train has completed the over curve action, Y2 output is 1, otherwise output is 0;

[0041] KA1: intermediate relay for controlling the start and stop of the first electromagnetic valve;

[0042] KT1: first time relay for controlling the pause time of the lubricating block periodic operation;

[0043] KT2: second time relay for controlling the operation time of the lubricating block periodic operation. DETAILED DESCRIPTION

[0044] The application will be further described in conjunction with specific preferred embodiments, but the scope of protection of the application is not limited thereby.

[0045] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0046] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0047] Please refer to Figure 2 Figure 4 An embodiment of the rail vehicle dry rim lubricating device of the present application comprises a mechanical part and a circuit control part.

[0048] I. Mechanical part

[0049] ​The mechanical part of the present application is composed of a primary electromagnetic valve 1, a secondary electromagnetic valve 2, a primary cylinder 3, a secondary cylinder 17, a lubricating block packaging box 16, a lubricating block 11 and the like. The functions of the primary electromagnetic valve 1 and the primary cylinder 3 are to make the lubricating block packaging box 16 and the lubricating block 11 approach the wheel rim 12 and keep a certain distance from the wheel rim 12, so as not to damage the lubricating block packaging box 16 due to the rotation of the wheel rim 12; the functions of the secondary electromagnetic valve 2 and the secondary cylinder 17 are to make the secondary piston 8 push the lubricating block 11 to intermittently abut against the wheel rim 12 to perform wheel rim lubrication, and at the same time, the overhanging length of the lubricating block 11 extending out of the lubricating block packaging box 16 is limited within a small range, so as to avoid the breakage of the lubricating block 11 due to the overlong overhanging. The structure of the mechanical part will be described in detail as follows:

[0050] Figure 2 The present application is a dry type wheel rim lubricating device for rail vehicles. The primary electromagnetic valve 1 and the secondary electromagnetic valve 2 of the present application can be two-position three-way electromagnetic valves, and the cylinders connected with them are the primary cylinder 3 and the secondary cylinder 17 respectively. The primary electromagnetic valve 1 is installed on the charging and discharging path of the primary cylinder 3, and is used to control the charging and discharging of the primary cylinder 3. The secondary electromagnetic valve 2 is installed on the charging and discharging path of the secondary cylinder 17, and is used to control the charging and discharging of the secondary cylinder 17. The primary cylinder 3 is tightly connected with the bogie frame 5, one end of the secondary cylinder 17 is tightly connected with the primary piston 4 installed in the primary cylinder 3, and the other end of the secondary cylinder 17 is fixedly connected with the lubricating block packaging box 16. The secondary cylinder 17 is allowed to move along the axis of the primary cylinder 3 under the action of the primary piston 4, and the secondary cylinder 17 drives the entire lubricating block packaging box 16 to approach or move away from the wheel rim 12 during reciprocating movement. The secondary piston 8 in the secondary cylinder 17 abuts against the lubricating block 11 installed in the lubricating block packaging box 16, and the lubricating block 11 is pushed by the secondary piston 8 to abut against or move away from the wheel rim 12, that is, the charging and discharging of the secondary cylinder 17 controls the implementation or stop of the lubricating work.

[0051] In addition, the first spring 7 is installed between the primary piston 4 and the cylinder body in the primary cylinder 3, and the first spring 7 is compressed when the primary piston 4 pushes out the secondary cylinder 17. When the primary electromagnetic valve 1 is closed, the restoring force of the first spring 7 drives the primary piston 4 to reset. The spring baffle 10 is installed in the lubricating block packaging box 16 and cannot be moved. The second spring 9 is installed between the secondary piston 8 and the spring baffle 10. The middle of the spring baffle 10 is provided with a small hole to allow the push rod of the secondary piston 8 to apply pressure to the lubricating block 11. When the secondary piston 8 pushes out the lubricating block 11, the second spring 9 is compressed. When the secondary electromagnetic valve 2 is closed, the restoring force of the second spring 9 drives the secondary piston 8 to reset.

[0052] The end of stroke of the primary piston 4 inside the primary cylinder 3 is equipped with a stopper 6 and a mechanical stroke switch SQA. When the primary cylinder 3 is driven forward by the primary piston 4 to drive the secondary cylinder 17, the primary piston 4 contacts the stroke switch SQA while stopping in front of the stopper 6, and the lubricating block 11 is intermittently contacted with the wheel flange 12.

[0053] In order to reduce the impact of the lubricating block 11 on the wheel flange 12 and ensure that the lubricating block 11 can quickly resist the wheel flange 12 for lubrication, the inner wall of the lubricating block packaging box 16 is equipped with a pawl 15 and a pawl spring 13, and the pawl spring 13 is installed between the lubricating block packaging box 16 and the pawl 15. The pawl 15 cooperates with the gear teeth 14 on the lubricating block 11 to ensure that the lubricating block 11 can only move in one direction towards the wheel flange 12, and prevent the lubricating block 11 from retreating with the secondary cylinder 17.

[0054] II. Circuit control

[0055] The circuit control part is composed of an intermediate relay KA1, time relays KT1 and KT2, a start button SB1, a stroke switch SQA, etc. The intermediate relay KA1 is used to control the start and stop of the primary electromagnetic valve 1. When the primary electromagnetic valve 1 is started, the primary cylinder 3 is inflated, and the secondary cylinder 17 and the lubricating block packaging box 16 and its lubricating block 11 connected thereto are pushed to approach the wheel flange 12 by the primary piston 4 until the primary piston 4 stops encountering the stroke switch SQA and the stopper 6. The arrangement of the stroke switch SQA and the stopper 6 ensures that the lubricating block packaging box 16 cannot approach the wheel flange 12 indefinitely, and maintains a certain distance D.

[0056] The first and second time relays KT1 and KT2 and the stroke switch SQA jointly control the start and stop of the secondary electromagnetic valve 2, i.e. the intermittent operation control of the lubricating block 11.

[0057] The driver's room of the vehicle is provided with a start button SB1 and a stop button SB2. The driver can start the primary electromagnetic valve 1 at any time through the operation of the start button SB1, so that the dry-type wheel flange lubricating device of the present application starts to lubricate the wheel flange. The driver can stop the lubrication of the wheel flange by the device of the present application at any time by pressing the stop button SB2 to close the primary electromagnetic valve 1 and realize the closing of the entire control circuit.

[0058] The curve detection output signal Y1 of the vehicle central control system can start the primary electromagnetic valve 1, so that the dry-type wheel flange lubricating device of the present application starts to lubricate the wheel flange. The curve completion output signal Y2 controls the closing of the primary electromagnetic valve 1, so that the entire control circuit of the dry-type wheel flange lubricating device of the present application is closed, and the dry-type wheel flange lubricating device ends the lubrication and retreats as a whole.

[0059] Combination Figure 2 , 34. When the start button SB1 is pressed in the driver's cab or the curve detection output signal Y1 = 1 from the central control system, the coil of the intermediate relay KA1 is energized, the normally open contact KA1 is closed, the first-stage solenoid valve control coil YV1 is energized to start the first-stage solenoid valve 1, and the first-stage piston 4 of the first-stage cylinder 3 pushes the second-stage cylinder 17 forward a distance H. Figure 3 As shown, when the primary piston 4 and secondary cylinder 17 advance to the end of their stroke, the primary piston 4 contacts the stopper 6 and the mechanical travel switch SQA. The coil of the first time relay KT1 is energized, and timing begins. After the delay time t1 is reached, the delayed normally open contact KT1 closes, energizing the secondary solenoid valve control coil YV2 to activate the secondary solenoid valve 2, inflating the secondary cylinder 17 and advancing the secondary piston 8. Simultaneously, the coil of the second time relay KT2 is energized, and timing begins. After the delay time t2 is reached, the delayed normally closed contact KT2 opens, closing the secondary solenoid valve 2, deflating the secondary cylinder 17, and retracting the secondary piston 8. The above actions are then repeated, achieving intermittent lubrication of the lubricating block 11. During this process, when the driver presses the stop button SB2, or when the central control system outputs the cornering completion output signal Y2 = 1, the primary solenoid valve 1 is deenergized, lubrication stops, and the lubricating block 11 returns to its origin.

[0060] Delay times t1 and t2 are set based on site requirements. In this embodiment, t1 is set to 6 seconds and t2 to 1 second. Considering that at time 0, the secondary cylinder 17 advances and the primary piston 4 contacts the travel switch SQA, the device will operate continuously for 7 seconds, with 6 seconds of rest time and 1 second of lubricating block 11 operating time. This significantly reduces the wear time of lubricating block 11 while maintaining good lubrication performance.

[0061] The complete working process of the present invention is as follows: the driver presses the start button SB1 in the driver's cab, or the central control system sends an output signal Y1=1, the first-level solenoid valve 1 is energized, and the dry lubrication device as a whole (including the first-level piston 4, the second-level cylinder 17, the lubrication block packaging box 16 and the lubrication block 11) extends forward close to the wheel rim 12. When the first-level piston 4 and the second-level cylinder 17 are blocked by the block 6, the second-level solenoid valve 2 is started after waiting for t1 time, and the second-level piston 8 extends the lubrication block 11 to press against the wheel rim 12 to start lubrication. After t2 time, the second-level solenoid valve 2 is closed, the second-level piston 8 retreats, and the lubrication block 11 is kept in place by the pawl 15 but does not lubricate. After waiting for t1 time, the lubrication block 11 is extended again to press against the wheel rim 12 for lubrication. This is repeated to realize the intermittent lubrication process. During intermittent lubrication, once the driver presses the stop button SB2 or the central control sends the output signal Y2=1, the first-stage solenoid valve 1 is de-energized, and the first-stage piston 4 is retracted by the spring and no longer contacts the travel switch SQA, causing the second-stage solenoid valve 2 to be de-energized, the second-stage cylinder to stop operating, and the dry lubrication device as a whole to return to its initial position.

[0062] The working process of the present application has at least the following three working states:

[0063] 1) The first electromagnetic valve 1 is kept on, when the second electromagnetic valve 2 is on, the second cylinder 17 is filled with air, the lubricating block 11 is pushed forward by the push rod of the second piston 8 and is pressed against the wheel rim 12 for lubrication;

[0064] 2) When the first electromagnetic valve 1 is on, and the second electromagnetic valve 2 is off, the second cylinder 17 is deflated, the piston 8 is pushed back by the push spring 9, the lubricating block 11 is no longer pressed against the wheel rim 12, and the lubrication is suspended;

[0065] 3) When the first electromagnetic valve 1 is off, the first cylinder 3 is deflated, the first piston 4 is pushed back by the first spring 7 and leaves the stop block 6, the travel switch SQA is off, the second electromagnetic valve 2 is off, the second cylinder 17 is deflated, the second piston 8 and the lubricating block packaging box 16 return to the original position, the lubricating block 11 cannot be pushed back by the pawl 15, and extends a length of the lubricating block packaging box 16, which is the distance D between the lubricating block packaging box 16 and the wheel rim 12, and the lubrication is stopped.

[0066] The present application uses electromagnetic valves to control the lubricating block 11 to realize the mode of two-stage action, that is, the first electromagnetic valve 1 makes the entire lubricating block packaging box 16 approach the wheel rim 12, and the second electromagnetic valve 2 makes the second piston 8 push the lubricating block 11 to press against the wheel rim 12 for lubrication, which reduces the stroke of the lubricating block 11 in the working process and enables it to quickly enter the working state.

[0067] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can make many possible changes and modifications to the technical solutions of the present application, or modify equivalent embodiments with equivalent changes, without departing from the scope of the technical solutions of the present application. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application shall fall within the protection scope of the technical solutions of the present application.

Claims

1. A dry wheel rim lubrication device for a railway vehicle, comprising a bogie frame, a wheel and a lubrication block, characterized in that: A first-stage cylinder is mounted on the bogie frame, a first-stage piston is mounted in the first-stage cylinder, the first-stage piston is connected to one end of a second-stage cylinder, the other end of the second-stage cylinder is connected to a lubricating block packaging box, a second-stage piston is mounted in the second-stage cylinder, the lubricating block is mounted in the lubricating block packaging box, the first-stage piston drives the second-stage cylinder and the lubricating block packaging box to approach or separate from the wheel rim, and the second-stage cylinder drives the lubricating block to press against or separate from the wheel rim; A first-level solenoid valve is installed at the medium input end of the first-level cylinder, and a second-level solenoid valve is installed at the medium input end of the second-level cylinder. The control end of the second-level solenoid valve is connected to a first time relay and a second time relay. The first time relay and the second time relay are used to control the start and close of the second-level solenoid valve. A travel switch is installed at the stroke end of the first-level piston. After the travel switch is triggered, the first time relay is energized and starts timing. After the delay time t1 is reached, the second-level solenoid valve is started, and the second-level piston pushes the lubrication block and abuts the wheel rim. At the same time, the second time relay is energized and starts timing. After the delay time t2 is reached, the second-level solenoid valve is closed and the second-level piston retreats.

2. The rail vehicle dry wheel rim lubrication device according to claim 1, characterized in that: The control end of the first-level solenoid valve is connected to an intermediate relay, and the intermediate relay is used to control the start and stop of the first-level solenoid valve.

3. The rail vehicle dry wheel rim lubrication device according to claim 1, characterized in that: A stopper is installed at the stroke end of the first-stage piston.

4. The rail vehicle dry wheel rim lubrication device according to claim 1, characterized in that: A first spring for returning the first piston to its original position is installed in the first cylinder, and a second spring for returning the second piston to its original position is installed in the second cylinder.

5. The rail vehicle dry wheel rim lubrication device according to claim 1, characterized in that: A pawl is installed on the inner wall of the lubricating block packaging box, a pawl spring is installed between the lubricating block packaging box and the pawl, and grinding teeth are provided on the lubricating block. The pawl is clamped into the grinding teeth of the lubricating block to form a fit.

6. The rail vehicle dry wheel rim lubrication device according to claim 2, characterized in that: A start button for starting the first-stage solenoid valve at any time and a stop button for closing the first-stage solenoid valve at any time are provided in the vehicle driver's cab.

7. The rail vehicle dry wheel rim lubrication device according to claim 2, characterized in that: The curve detection output signal and the curve completion output signal of the vehicle central control system are connected to the control circuit of the intermediate relay. When the curve detection output signal Y1=1, the first-level solenoid valve is started, and when the curve completion output signal Y2=1, the first-level solenoid valve is closed.

8. An intermittent wheel rim lubrication method for a rail vehicle dry wheel rim lubrication device according to claim 1, characterized in that include: A first-level solenoid valve is installed at the medium input end of the first-level cylinder, and a second-level solenoid valve is installed at the medium input end of the second-level cylinder. The control end of the first-level solenoid valve is connected to an intermediate relay, and the control end of the second-level solenoid valve is connected to a first time relay and a second time relay. The intermediate relay is used to control the start and stop of the first-level solenoid valve, and the first time relay and the second time relay are used to control the start and stop of the second-level solenoid valve. A stopper and a travel switch are installed at the end of the stroke of the first-stage piston; The first-stage piston drives the second-stage cylinder to the end of the first-stage piston stroke and triggers the travel switch; The first time relay is energized and starts timing. After the timing reaches the delay time t1, the secondary solenoid valve is started, and the secondary cylinder drives the lubrication block until the lubrication block abuts the wheel rim for lubrication. At the same time as the secondary solenoid valve is started, the second time relay is energized and starts timing. After the timing reaches the delay time t2, the secondary solenoid valve is closed, the secondary piston retreats, and the lubrication block is separated from the wheel rim. The first time relay is energized and starts timing again, entering the next lubrication cycle of the lubrication block, and repeating this process.

9. The intermittent wheel rim lubrication method of the rail vehicle dry wheel rim lubrication device according to claim 8, characterized in that: The vehicle driver's cab is equipped with a start button for starting the first-level solenoid valve at any time and a stop button for closing the first-level solenoid valve at any time; the curve detection output signal and the curve completion output signal of the vehicle central control system are connected to the control circuit of the intermediate relay. When the curve detection output signal Y1=1, the first-level solenoid valve is started, and when the curve completion output signal Y2=1, the first-level solenoid valve is closed.

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