Self-adaptive lubricating and cooling device for cutting arm of coal mine heading machine

Abstract

The utility model discloses a self-adaptive lubricating and cooling device for a cutting arm of a coal mine heading machine, and relates to the technical field of lubricating and cooling devices. The connecting cylinder is rotatably arranged outside the cutting main shaft in a sleeving manner; the front bearing is mounted between the inner wall of the front end of the connecting cylinder and the cutting main shaft; the rear bearing is mounted between the inner wall of the rear end of the connecting cylinder and the cutting main shaft; the oil storage cavity is formed among the inner wall of the connecting cylinder, the outer wall of the cutting main shaft and the axial end surfaces of the front bearing and the rear bearing; the communicating piece is arranged in the middle of the oil storage cavity; the communicating piece comprises an annular sealing ring and a communicating pipe; the annular sealing ring is arranged in the middle of the oil storage cavity and divides the oil storage cavity into a front cavity and a rear cavity; according to the utility model, partial flow and distribution of lubricating oil in the front chamber and the rear chamber are realized through the communicating pipe, so that the front bearing and the rear bearing can still be fully lubricated even if the cutting main shaft is in a complex posture of lifting or downward cutting, and a lubricating blind area is avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of lubrication and cooling devices, specifically an adaptive lubrication and cooling device for the cutting arm of a coal mine tunneling machine. Background Technology

[0002] During the cutting process, the cutting arm of a cantilever tunneling machine can cut vertically, horizontally, and vertically. When cutting upper rock strata, the front of the cutting arm is raised, forming an angle of up to 45 degrees with the horizontal plane. At this time, due to its own weight, most of the lubricating oil will accumulate at the rear of the cutting arm. This means that the seals and bearings at the front of the cutting arm will not receive sufficient lubrication. Since the cutting arm is raised for about one-third of the tunneling machine's cutting work, the lack of adequate lubrication will significantly reduce the lifespan of the seals and bearings at the front of the cutting arm. This shortens the tunneling machine's use and maintenance cycle, leading to a serious waste of human and material resources, and also affecting the user's production operations. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides an adaptive lubrication and cooling device for the cutting arm of a coal mine tunneling machine.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows:

[0005] The adaptive lubrication and cooling device for the cutting arm of a coal mine tunneling machine includes:

[0006] Cutting the spindle;

[0007] The connecting sleeve is rotatably fitted onto the outside of the cutting spindle;

[0008] The front bearing is installed between the inner wall of the front end of the connecting cylinder and the cutting spindle.

[0009] The rear bearing is installed between the inner wall of the rear end of the connecting cylinder and the cutting spindle;

[0010] The oil reservoir is formed between the inner wall of the connecting cylinder, the outer wall of the cutting spindle, and the axial end faces of the front and rear bearings.

[0011] A connecting element is disposed in the middle of the oil storage chamber; the connecting element includes an annular sealing ring and a connecting pipe; the annular sealing ring is disposed in the middle of the oil storage chamber and divides the oil storage chamber into a front chamber and a rear chamber; the connecting pipe axially passes through the annular sealing ring and extends to the front and rear sides of the annular sealing ring respectively, with the extended portion located in the front chamber and the rear chamber; the front chamber and the rear chamber are kept in partial communication of lubricating oil through the connecting pipe.

[0012] Preferably, the oil storage cavity is formed by the inner wall of the connecting cylinder, the outer wall of the cutting spindle, the rear end face of the inner ring of the front bearing, and the front end face of the inner ring of the rear bearing.

[0013] Preferably, the connecting pipe is fixedly installed on the annular sealing ring, and when the cutting spindle is vertical, the connecting pipe is located in the lubricating oil of the front chamber and the rear chamber.

[0014] Preferably, the outer circumferential surface of the annular sealing ring is in a sealing connection with the inner wall of the connecting cylinder; the inner circumferential surface of the annular sealing ring is in a sealing rotatable connection with the outer wall of the cutting spindle.

[0015] Preferably, the outer circumferential surface of the annular sealing ring is provided with an outer sealing part for sealing and cooperating with the inner wall of the connecting cylinder, and the inner wall of the connecting cylinder is provided with an annular inner groove adapted to the outer sealing part.

[0016] Preferably, the connecting pipes are configured as multiple pipes, and a ring array is disposed through the ring sealing ring.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] 1. Ensure adequate lubrication of bearings: The connecting pipe enables partial flow and distribution of lubricating oil in the front and rear chambers, ensuring that the front and rear bearings are adequately lubricated even when the cutting spindle is in a complex posture of lifting or downward cutting, thus avoiding lubrication blind spots.

[0019] 2. Dynamic pressure difference driven circulation: When the cutting spindle rotates, a pressure difference is generated between the front and rear chambers, which causes the lubricating oil to circulate through the connecting pipe, continuously carrying away heat and replenishing lubrication, thus improving the reliability and durability of the cutting arm under complex working conditions.

[0020] 3. Sealing and rotation compatibility: The outer circumference of the annular sealing ring seals with the inner wall of the connecting cylinder, and the inner circumference seals with the outer wall of the cutting spindle. This ensures the sealing of the oil storage cavity without affecting the rotation of the spindle, providing structural protection for the realization of lubrication and cooling functions.

[0021] 4. Through the synergistic effect of lubrication, cooling and circulation mechanisms, the reliability and durability of the coal mine tunneling machine cutting arm under complex working conditions are effectively improved, ensuring that the equipment can operate stably under different cutting postures. Attached Figure Description

[0022] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein:

[0023] Figure 1 This is a three-dimensional structural schematic diagram of the adaptive lubrication and cooling device for the cutting arm of a coal mine tunneling machine according to this utility model;

[0024] Figure 2This is a three-dimensional structural diagram of the connecting component of the adaptive lubrication and cooling device for the cutting arm of a coal mine tunneling machine according to this utility model;

[0025] Figure 3 This is a second-view three-dimensional structural diagram of the connecting component of the adaptive lubrication and cooling device for the cutting arm of a coal mine tunneling machine according to this utility model.

[0026] The diagram shows the following labels: 1. Cutting spindle; 2. Connecting cylinder; 3. Front bearing; 4. Rear bearing; 5. Oil reservoir; 6. Connecting component; 61. Annular seal; 62. Connecting pipe. Detailed Implementation

[0027] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0028] Example

[0029] like Figure 1-3 As shown, the adaptive lubrication and cooling device for the cutting arm of a coal mine tunneling machine includes:

[0030] Cutting spindle 1: As the core rotating component of the entire device, it directly participates in the cutting work of coal mine tunneling and bears huge torque and impact loads.

[0031] Connecting cylinder 2: Rotatably sleeved on the outside of the cutting spindle 1, providing a mounting support structure for components such as the front bearing 3 and the rear bearing 4, and together with the cutting spindle 1, forming part of the boundary of the oil storage cavity 5.

[0032] Front bearing 3: Installed between the inner wall of the front end of the connecting cylinder 2 and the cutting spindle 1, it supports the front end of the cutting spindle 1 and reduces rotational friction, ensuring the stable operation of the front end of the cutting spindle 1.

[0033] Rear bearing 4: Installed between the inner wall of the rear end of the connecting cylinder 2 and the cutting spindle 1, supporting the rear end of the cutting spindle 1, and working in conjunction with the front bearing 3 to ensure the smooth rotation of the cutting spindle 1.

[0034] Oil reservoir 5: It is formed by the inner wall of the connecting cylinder 2, the outer wall of the cutting spindle 1, the rear end face of the inner ring of the front bearing 3, and the front end face of the inner ring of the rear bearing 4. The oil reservoir 5 is used to store lubricating oil, providing a lubrication environment for the front bearing 3 and the rear bearing 4, and cooling components such as the cutting spindle 1 during the flow of lubricating oil.

[0035] Connecting component 6: Located in the middle of the oil storage cavity 5, it includes an annular sealing ring 61 and a connecting pipe 62.

[0036] Annular sealing ring 61: Located in the middle of the oil storage chamber 5, dividing the oil storage chamber 5 into a front chamber and a rear chamber. Its outer circumferential surface is sealed to the inner wall of the connecting cylinder 2, and a reliable seal is achieved by the outer sealing part matching the annular inner groove on the inner wall of the connecting cylinder 2; its inner circumferential surface is rotatably sealed to the outer wall of the cutting spindle 1, ensuring the sealing effect without affecting the rotation of the cutting spindle 1.

[0037] Connecting pipe 62: axially penetrates the annular sealing ring 61 and extends to the front and rear sides of the annular sealing ring 61 respectively, with the extended portions located in the front and rear chambers. The connecting pipe 62 is fixedly installed on the annular sealing ring 61. When the cutting spindle 1 is vertical, the connecting pipe 62 is located within the lubricating oil in the front and rear chambers. Multiple connecting pipes 62 are arranged in a ring array penetrating the annular sealing ring 61, ensuring partial communication of lubricating oil between the front and rear chambers, thus achieving proper flow and distribution of lubricating oil between the front and rear chambers.

[0038] Before the device is started, lubricating oil is pre-injected into the oil storage chamber 5. This chamber is formed by the inner wall of the connecting cylinder 2, the outer wall of the cutting spindle 1, the rear end face of the inner ring of the front bearing 3, and the front end face of the inner ring of the rear bearing 4, providing storage space for the lubricating oil. An annular sealing ring 61 is located in the middle of the oil storage chamber 5, dividing it into a front chamber and a rear chamber. The outer circumferential surface of the annular sealing ring 61 is sealed to the inner wall of the connecting cylinder 2, and the inner circumferential surface is sealed to the outer wall of the cutting spindle 1, ensuring a sealing effect without affecting the rotation of the cutting spindle 1.

[0039] When the coal mine tunneling machine is working, the cutting spindle 1 rotates at high speed under enormous torque and impact loads, driving the front bearing 3 and the rear bearing 4 to rotate together. At this time, the lubricating oil in the oil reservoir 5 plays a role. On the one hand, the lubricating oil wets the front bearing 3 and the rear bearing 4, forming an oil film during the rotation of the bearings, effectively reducing friction between the bearings and the shaft, reducing wear, and extending the service life of the bearings; on the other hand, the lubricating oil absorbs the heat generated by the high-speed operation of the cutting spindle 1 and other components during its flow, achieving cooling of the cutting spindle 1 and other components through heat transfer, preventing them from being damaged due to overheating.

[0040] The connecting pipes 62 play a crucial role in the flow of lubricating oil. Multiple connecting pipes 62 are arranged in a ring array, passing through the annular sealing ring 61. They extend axially through the annular sealing ring 61 and extend to the front and rear sides respectively, with the extended portions located within the front and rear chambers. When the cutting spindle 1 is in the lifting or downward cutting position, the connecting pipes 62 remain within the lubricating oil in the front and rear chambers, maintaining partial communication between them. As the cutting spindle 1 rotates, a pressure difference is generated between the front and rear chambers, causing the lubricating oil to partially flow and distribute through the connecting pipes 62, ensuring that the bearings in both chambers receive sufficient lubrication and cooling. This circulating flow of lubricating oil continuously removes heat generated by the components and replenishes lubrication, maintaining stable operation of the device and effectively improving the reliability and durability of the coal mine tunneling machine's cutting arm under complex working conditions. When the cutting spindle 1 is in the lifting or downward cutting position, the front bearing 3 or the rear bearing 4 will not fail to receive lubrication.

[0041] Ensure adequate lubrication of bearings: The connecting pipe enables partial flow and distribution of lubricating oil between the front and rear chambers, ensuring that the front and rear bearings are adequately lubricated even when the cutting spindle is in a complex posture of lifting or downward cutting, thus avoiding lubrication blind spots.

[0042] Dynamic pressure difference driven circulation: When the cutting spindle rotates, a pressure difference is generated between the front and rear chambers, which causes the lubricating oil to circulate through the connecting pipe, continuously carrying away heat and replenishing lubrication, thus improving the reliability and durability of the cutting arm under complex working conditions.

[0043] Sealing and rotation compatibility: The outer circumference of the annular sealing ring seals with the inner wall of the connecting cylinder, and the inner circumference seals with the outer wall of the cutting spindle. This ensures the sealing of the oil storage cavity without affecting the rotation of the spindle, providing structural protection for the realization of lubrication and cooling functions.

[0044] Through the synergistic effect of lubrication, cooling and circulation mechanisms, the reliability and durability of the cutting arm of the coal mine tunneling machine are effectively improved under complex working conditions, ensuring that the equipment can operate stably under different cutting postures.

[0045] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. An adaptive lubrication and cooling device for the cutting arm of a coal mine tunneling machine, characterized in that, include: Cut the spindle (1); The connecting sleeve (2) is rotatably fitted onto the outside of the cutting spindle (1); The front bearing (3) is installed between the inner wall of the front end of the connecting cylinder (2) and the cutting spindle (1); The rear bearing (4) is installed between the inner wall of the rear end of the connecting cylinder (2) and the cutting spindle (1); The oil storage cavity (5) is formed between the inner wall of the connecting cylinder (2), the outer wall of the cutting spindle (1), and the axial end faces of the front bearing (3) and the rear bearing (4); A connecting element (6) is disposed in the middle of the oil storage chamber (5); the connecting element (6) includes an annular sealing ring (61) and a connecting pipe (62); the annular sealing ring (61) is disposed in the middle of the oil storage chamber (5) and divides the oil storage chamber (5) into a front chamber and a rear chamber; the connecting pipe (62) axially penetrates the annular sealing ring (61) and extends to the front and rear sides of the annular sealing ring (61) respectively, with the extended portion located in the front chamber and the rear chamber; the front chamber and the rear chamber are connected by the connecting pipe (62) to maintain partial communication of lubricating oil.

2. The adaptive lubrication and cooling device for the cutting arm of a coal mine tunneling machine according to claim 1, characterized in that: The oil storage chamber (5) is formed by the inner wall of the connecting cylinder (2), the outer wall of the cutting spindle (1), the rear end face of the inner ring of the front bearing (3), and the front end face of the inner ring of the rear bearing (4).

3. The adaptive lubrication and cooling device for the cutting arm of a coal mine tunneling machine according to claim 2, characterized in that: The connecting pipe (62) is fixedly installed on the annular sealing ring (61). When the cutting spindle (1) is vertical, the connecting pipe (62) is located in the lubricating oil of the front chamber and the rear chamber.

4. The adaptive lubrication and cooling device for the cutting arm of a coal mine tunneling machine according to claim 3, characterized in that: The outer circumferential surface of the annular sealing ring (61) is sealed to the inner wall of the connecting cylinder (2); the inner circumferential surface of the annular sealing ring (61) is sealed to the outer wall of the cutting spindle (1).

5. The adaptive lubrication and cooling device for the cutting arm of a coal mine tunneling machine according to claim 4, characterized in that: The outer circumferential surface of the annular sealing ring (61) is provided with an outer sealing part for sealing and cooperating with the inner wall of the connecting cylinder (2), and the inner wall of the connecting cylinder (2) is provided with an annular inner groove adapted to the outer sealing part.

6. The adaptive lubrication and cooling device for the cutting arm of a coal mine tunneling machine according to claim 5, characterized in that: The connecting pipe (62) is configured as a plurality of pipes, and the annular array is disposed through the annular sealing ring (61).

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