Rotating machine bearing lubricating device capable of automatically and circularly supplementing oil on line

Abstract

The invention relates to the technical field of bearing processing, and provides a rotating machinery bearing lubricating device capable of online automatic circulating oil recharging, which comprises a bearing protecting cover and an end cover, a bearing cavity is enclosed by the bearing protecting cover and the end cover, a bearing main body is arranged in the bearing cavity, the bearing main body comprises a bearing roller way, the bearing roller way is communicated with the bearing cavity, and the bearing roller way is arranged in the bearing cavity. A rotating shaft, a piston and a push-pull mechanism are further arranged in the bearing cavity, the rotating shaft penetrates through the bearing body and extends out of the bearing protecting cover, the piston is slidably arranged on the inner wall of the bearing protecting cover and used for extruding lubricating grease in the bearing cavity, and the push-pull mechanism is connected with the piston and used for driving the piston to reciprocate in the axial direction of the rotating shaft. According to the scheme, the defects of an existing rotating machine are overcome, grease in the bearing protecting cover is utilized repeatedly, the service life of the bearing of the small and medium-sized rotating machine is prolonged, and the overhaul and maintenance frequency and labor intensity of overhaul personnel are remarkably reduced.

Description

Technical Field

[0001] This invention relates to the field of bearing processing technology, and specifically to a lubrication device for rotating mechanical bearings that can automatically replenish oil online. Background Technology

[0002] In the assembly process of rotating machinery with traditional structures, after assembling the bearing, the relevant technicians usually use the following lubrication method: fill the bearing chamber with lubricating grease and fill the inner and outer covers of the bearing with 1 / 2 to 3 / 4 of the volume of lubricating grease. This is considered to achieve effective lubrication of the bearing and ensure the normal operation of the equipment.

[0003] However, this lubrication method has obvious irrationalities and technical defects. When the rotating machinery starts and runs continuously, the lubricating grease in the bearing raceway is continuously squeezed out or thrown into the cavity of the bearing inner cover under the centrifugal force generated by the bearing rotation. Since there is no effective oil return structure between the cover and the bearing raceway, the lubricating grease that enters the cover cannot flow back to the bearing raceway on its own and cannot participate in bearing lubrication again. At this time, the bearing can only rely on the oil film formed in the raceway at the beginning of operation to maintain operation. As the running time increases, the oil film will gradually wear away, and the heat generated by the bearing operation will cause the oil film to melt. If the bearing is not replenished with lubricating grease in time, it will lead to insufficient bearing lubrication, which will cause bearing wear, jamming and other failures, ultimately causing bearing damage, affecting the normal operation of the rotating machinery, increasing equipment maintenance costs and downtime losses. Summary of the Invention

[0004] To address the problems existing in the background technology, this invention proposes a lubrication device for rotating mechanical bearings that can automatically replenish oil online. This device overcomes the shortcomings of existing rotating machinery, enables multiple uses of grease in the bearing cover, extends the service life of small and medium-sized rotating mechanical bearings, and significantly reduces the number of maintenance visits and the labor intensity for maintenance personnel.

[0005] To achieve the above objectives, the present invention adopts the following solution: A rotating machinery bearing lubrication device with online automatic circulating oil replenishment includes a bearing cover and an end cover, which enclose a bearing chamber. A bearing body is housed within the bearing chamber, and the bearing body includes a bearing roller conveyor communicating with the bearing chamber. The bearing chamber also contains a rotating shaft, a piston, and a push-pull mechanism. The rotating shaft passes through the bearing body and extends beyond the bearing cover. The piston is slidably disposed on the inner wall of the bearing cover for squeezing the lubricating grease within the bearing chamber. The push-pull mechanism is connected to the piston for driving the piston to reciprocate along the axial direction of the rotating shaft. Optionally, the end cap and the bearing cover are detachably connected by bolts.

[0006] Optionally, the bearing cover includes a left cover and a right cover arranged symmetrically from left to right; the end cover includes an upper end cover and a lower end cover arranged symmetrically from top to bottom.

[0007] Optionally, the bearing body divides the bearing chamber into a left chamber and a right chamber; the piston includes two pistons respectively disposed in the left chamber and the right chamber, and the center of the two pistons is provided with a reserved hole for the rotating shaft to pass through.

[0008] Optionally, the left chamber and the right chamber are each provided with at least one push-pull mechanism for independently driving the corresponding piston.

[0009] Optionally, the push-pull mechanism includes an electromagnet and a spring coil sleeved on the electromagnet, one end of the spring coil being fixed to the side wall of the bearing cover and the other end being fixed to the outer wall of the piston; the inner wall of the bearing cover is provided with an iron plate corresponding to the position of the electromagnet.

[0010] Optionally, the spring coil is a helical spring coil or a butterfly spring coil.

[0011] Optionally, the push-pull mechanism further includes an external power supply module electrically connected to the spring coil, the power supply module being configured to intermittently power the spring coil.

[0012] Optionally, the piston has a sealing ring on its outer edge, and the sealing ring slides and seals with the inner wall of the bearing cover.

[0013] Optionally, the method of using the lubrication device includes the following steps: Step 1: During the assembly of the bearing body, lubricating grease is filled into the bearing cavity formed by the bearing cover and the end cover. Step 2: When the equipment is running, the piston is driven away from the bearing body by the push-pull mechanism to provide temporary storage space for the grease squeezed out or thrown out from the bearing roller. Step 3: When additional lubrication is needed, the piston is driven towards the bearing body by the push-pull mechanism to push the grease temporarily stored in the bearing cavity back to the bearing roller table to reform the oil film. Step 4: Repeat steps 2 and 3 to achieve periodic automatic oil replenishment lubrication of the bearing.

[0014] The beneficial effects of this invention are as follows: This solution uses a simple push-pull mechanism with electromagnets and spring coils to achieve the recycling and reuse of grease inside the bearing cover without altering the original bearing cover. When additional lubrication is needed, the external power supply module disconnects the electrical connection with the spring coil, causing it to lose power. The electromagnet's magnetic force disappears, and under the elastic force of the spring coil, the piston is pushed and moves along the axial direction of the rotating shaft toward the bearing body, pushing the grease temporarily stored in the bearing cavity back to the bearing roller to reform the oil film. This not only solves the problem of damage caused by oil film rupture in the later stages of traditional bearing operation and extends the service life of rolling bearings in small and medium-sized rotating machinery, but also significantly reduces the number of maintenance operations and the labor intensity for maintenance personnel. Attached Figure Description

[0015] Figure 1 This is a schematic cross-sectional view of the lubrication device of the present invention. Figure 2 This is a schematic diagram of a conventional structure in an embodiment of the present invention.

[0016] The following are the labels in the diagram: 1. Bearing body; 2. End cover; 3. Bearing chamber; 4. Bearing cover; 5. Bearing roller conveyor; 6. Shaft; 7. Electromagnet; 8. Spring coil; 9. Piston; 10. Iron sheet. Detailed Implementation

[0017] To make the present invention clearer and more understandable, the present invention will be described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the given embodiments are only one implementation method and do not represent all embodiments.

[0018] Example 1 Combination Figure 1 This invention provides a rotating mechanical bearing lubrication device with online automatic oil replenishment, aiming to solve the problem of the lack of an oil return structure between the cover and the bearing roller conveyor 5. Figure 2 As shown in the existing conventional structure, the lubricating grease inside the cover cannot participate in bearing lubrication again, which increases equipment maintenance costs.

[0019] This embodiment includes a bearing cover 4 and an end cover 2. The end cover 2 and the bearing cover 4 are detachably connected by bolts. The bearing cover 4 includes a left cover and a right cover arranged symmetrically from left to right. The end cover 2 includes an upper end cover 2 and a lower end cover 2 arranged symmetrically from top to bottom.

[0020] The bearing cover 4 and end cover 2 form a cylindrical bearing chamber 3. The bearing chamber 3 contains a bearing body 1 and a rotating shaft 6. In this embodiment, the bearing body 1 is a rolling bearing. The rolling bearing includes a bearing roller conveyor 5, which communicates with the bearing chamber 3. The bearing chamber 3 also contains the main components of a lubrication device, namely a piston 9 and a push-pull mechanism.

[0021] The rotating shaft 6 passes through the bearing body 1 and extends to the outside of the bearing cover 4. The piston 9 is slidably disposed on the inner wall of the bearing cover 4 for squeezing the lubricating grease in the bearing chamber 3. The push-pull mechanism is connected to the piston 9 for driving the piston 9 to reciprocate along the axial direction of the rotating shaft 6 to push the grease in the bearing chamber 3 to the bearing roller conveyor 5.

[0022] Specifically, the bearing body 1 divides the bearing chamber 3 into a left chamber and a right chamber. The volume of the left and right chambers can be designed according to actual transmission requirements. In this embodiment, the volumes of the left and right chambers are equal. The piston 9 includes two identical piston bodies, respectively disposed in the left and right chambers. Both piston bodies are made of high-strength aluminum alloy, which has the advantages of being lightweight and wear-resistant, and can adapt to pressure changes and reciprocating motion requirements within the chamber. Furthermore, a sealing ring is provided on the outer edge of the piston 9, and the sealing ring slides and seals with the inner wall of the bearing cover 4. A pre-drilled hole is provided at the center of the two pistons 9 for the shaft 6 to pass through, so as to avoid affecting the rotation of the shaft 6.

[0023] Specifically, at least one push-pull mechanism for independently driving the corresponding piston 9 is provided in both the left and right chambers. Figure 1 As shown, in this embodiment, each chamber is equipped with two push-pull mechanisms, one above the other, to drive the corresponding piston 9 to reciprocate in a balanced manner. Further, the push-pull mechanism includes an electromagnet 7 and a spring coil 8 sleeved on the electromagnet 7. The spring coil 8 is a helical spring coil 8 or a butterfly spring coil 8. One end of the spring coil 8 is fixed to the side wall of the bearing cover 4, and the other end is fixed to the outer wall of the piston 9. The inner wall of the bearing cover 4 is provided with an iron plate 10 corresponding to the position of the electromagnet 7, which is used to attract and engage with the electromagnet 7 when it is energized, thereby driving the piston 9 to move away from the bearing body 1.

[0024] Specifically, the push-pull mechanism also includes an external power supply module electrically connected to the spring coil 8. The power supply module is configured to intermittently power the spring coil 8. When powered on, the electromagnet 7 generates magnetic force and attracts the iron sheet 10; when powered off, the magnetic force of the electromagnet 7 disappears, and under the elastic force of the spring coil 8, the piston 9 is pushed and moves towards the bearing body 1 along the axial direction of the rotating shaft 6.

[0025] The operating procedure for the above-mentioned lubrication device includes: Step 1, Initial Installation and Lubrication: During the installation or maintenance of rotating machinery, the operator removes the end cover 2 and first fills the bearing chamber 3, which is enclosed by the bearing cover 4, with an appropriate amount of lubricating grease, typically filling it to 1 / 2 to 3 / 4 of its volume. After filling with grease, the end cover 2 is fixed to the bearing cover 4 with bolts, forming a sealed bearing chamber 3. At this time, the piston 9 is in its initial position near the side wall of the bearing cover 4, i.e., away from the bearing body 1.

[0026] Step 2, Lubricating Grease Discharge: Upon startup, the shaft 6 rotates. During rotation, some of the lubricating grease in the bearing roller conveyor 5 within the bearing body 1 is thrown out or squeezed out by centrifugal force, entering the left and right chambers on either side of the bearing body 1. At this time, the external power supply module of the push-pull mechanism keeps the electromagnet 7 energized. The electromagnet 7 generates magnetic force, attracting the iron sheet 10 on the inner wall of the bearing cover 4, causing the piston 9 to overcome the elastic force of the spring coil 8 and remain in a position away from the bearing body 1, thus providing sufficient temporary storage space for the discharged grease.

[0027] Step 3, Automatic Periodic Lubrication: When the preset timer period arrives, the external power supply module disconnects from the spring coil 8, de-energizing it. The electromagnet 7 loses its magnetic force, and under the elastic force of the spring coil 8, the piston 9 is pushed and moves along the axial direction of the shaft 6 towards the bearing body 1. At this time, the grease stored in the left and right chambers is squeezed, forcing it to flow back into the bearing roller conveyor 5. An effective lubricating oil film is re-formed between the rolling elements and the roller conveyor, achieving timely lubrication of the bearing and preventing wear caused by insufficient oil.

[0028] Step 4: After the preset oil replenishment time, the external power supply module is energized again through the spring coil 8. The electromagnet 7 regenerates its magnetic force, attracting the iron plate 10 and overcoming the elasticity of the spring coil 8 to pull the piston 9 back to its initial position away from the bearing body 1. The bearing chamber 3 is now ready to receive any subsequent grease ejected. Steps 2 and 3 are repeated to achieve periodic automatic oil replenishment lubrication of the bearing.

[0029] In summary, this device utilizes a simple push-pull mechanism consisting of an electromagnet 7 and a spring coil 8 to achieve the recycling and reuse of spilled grease. This not only solves the problem of damage caused by oil film rupture in the later stages of traditional bearing operation but also reduces the frequency of manual periodic lubrication maintenance, making it particularly suitable for high-temperature, continuously operating rotating machinery.

[0030] The specific embodiments of the present invention have been described in detail above with reference to the figures, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and these variations still fall within the protection scope of the present invention.

Claims

1. A rotating mechanical bearing lubrication device with online automatic circulating oil replenishment, comprising a bearing cover (4) and an end cover (2), wherein the bearing cover (4) and the end cover (2) enclose a bearing chamber (3), and a bearing body (1) is disposed within the bearing chamber (3), characterized in that: The bearing body (1) includes a bearing roller conveyor (5), which is connected to the bearing chamber (3). The bearing chamber (3) is also provided with a rotating shaft (6), a piston (9) and a push-pull mechanism. The rotating shaft (6) passes through the bearing body (1) and extends to the outside of the bearing cover (4). The piston (9) is slidably disposed on the inner wall of the bearing cover (4) for squeezing the lubricating grease in the bearing chamber (3). The push-pull mechanism is connected to the piston (9) for driving the piston (9) to reciprocate along the axial direction of the rotating shaft (6).

2. The online automatic circulating oil replenishment lubrication device for rotating mechanical bearings according to claim 1, characterized in that: The end cap (2) and the bearing cover (4) are detachably connected by bolts.

3. The online automatic circulating oil replenishment lubrication device for rotating mechanical bearings according to claim 2, characterized in that: The bearing cover (4) includes a left cover and a right cover arranged symmetrically on the left and right sides; the end cover (2) includes an upper end cover (2) and a lower end cover (2) arranged symmetrically on the top and bottom sides.

4. The online automatic circulating oil replenishment lubrication device for rotating mechanical bearings according to claim 1, characterized in that: The bearing body (1) divides the bearing chamber (3) into a left chamber and a right chamber; the piston (9) includes two pistons (9) respectively disposed in the left chamber and the right chamber, and the center of the two pistons (9) is provided with a reserved hole for the rotating shaft (6) to pass through.

5. A lubrication device for rotating mechanical bearings with online automatic circulating oil replenishment according to claim 1, characterized in that: The left and right chambers are each provided with at least one push-pull mechanism for independently driving the corresponding piston (9).

6. A rotating mechanical bearing lubrication device with online automatic circulating oil replenishment according to claim 5, characterized in that: The push-pull mechanism includes an electromagnet (7) and a spring coil (8) sleeved on the electromagnet (7). One end of the spring coil (8) is fixed to the side wall of the bearing cover (4), and the other end is fixed to the outer wall of the piston (9). The inner wall of the bearing cover (4) is provided with an iron plate (10) corresponding to the position of the electromagnet (7).

7. A lubrication device for rotating mechanical bearings capable of online automatic circulating oil replenishment according to claim 6, characterized in that: The spring coil (8) is a helical spring coil (8) or a butterfly spring coil (8).

8. A lubrication device for rotating mechanical bearings with online automatic circulating oil replenishment according to claim 6, characterized in that: The push-pull mechanism also includes an external power supply module electrically connected to the spring coil (8), the power supply module being configured to intermittently switch the power on and off of the spring coil (8).

9. A lubrication device for rotating mechanical bearings with online automatic circulating oil replenishment according to claim 1, characterized in that: The piston (9) is provided with a sealing ring on its outer edge, and the sealing ring is in sliding sealing cooperation with the inner wall of the bearing cover (4).

10. A rotating mechanical bearing lubrication device with online automatic circulating oil replenishment according to claim 1, characterized in that, The method of using the lubrication device includes the following steps: Step 1: When assembling the bearing body (1), lubricating grease is filled into the bearing cavity (3) formed by the bearing cover (4) and the end cover (2); Step 2: When the equipment is running, the piston (9) is driven away from the bearing body (1) by the push-pull mechanism to provide temporary storage space for the grease squeezed out or thrown out from the bearing roller (5); Step 3: When additional lubrication is needed, the piston (9) is driven to move toward the bearing body (1) by the push-pull mechanism, and the grease temporarily stored in the bearing chamber (3) is pushed back to the bearing roller (5) to reform the oil film. Step 4: Repeat steps 2 and 3 to achieve periodic automatic oil replenishment lubrication of the bearing.

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