Mechanical seal lubricating device

Abstract

The utility model relates to mechanical seal field discloses a kind of mechanical seal lubricating device, including piston box, piston box is fixedly installed on shell, and oil tank is fixed on shell;Piston plate is installed in piston box, and piston rod is on piston plate;Reset spring is fixedly arranged in the rod cavity of piston box;Air bag is fixed in the rodless cavity of piston box;Oil pipe and spray pipe are fixed on piston box;Oil pipe is connected oil tank and air bag;Spray pipe is connected air bag;One-way valve is installed in spray pipe and oil pipe;Shell is sleeved on shaft body, and mechanical seal assembly is installed between shell and shaft body;Mechanical seal assembly includes dynamic ring;Annular oil groove is formed on the curved surface outer wall of dynamic ring along circumference, and piston rod is radially penetrated into annular oil groove along shaft body;Spray pipe is penetrated into shell and is connected annular oil groove;Transmission assembly is installed in annular oil groove, and piston rod is transmission matched with dynamic ring by transmission assembly.The utility model can realize active smearing, can promote smearing efficiency, can make smearing more uniform, and can improve lubricating effect.

Description

Technical Field

[0001] This utility model relates to the field of mechanical seals, and in particular to a mechanical seal lubrication device. Background Technology

[0002] The xanthation machine is a key piece of equipment in viscose fiber production. The alkali cellulose obtained from pulp after impregnation, pressing, and crushing must undergo a chemical reaction within the xanthation machine's reactor. Carbon disulfide reacts with cellulose to form cellulose xanthate, which can then dissolve in the alkaline solution to prepare spun viscose for further spinning and post-processing. Mechanical seal components are typically used on the agitator of the xanthation machine's reactor.

[0003] The mechanical seal assembly with cooling effect disclosed in announcement number CN219975334U includes a base, a protective cover, a rotating shaft, and a sealing assembly disposed inside the protective cover. The protective cover has a cavity inside, which is filled with oil-absorbing cotton. An oil injection hole is provided on the protective cover above the cavity. A sealing assembly is disposed on the top of the protective cover above the oil injection hole. An oil outlet hole is provided on the inner wall of the cavity, and the oil outlet hole extends into the interior of the protective cover.

[0004] Based on the above technical features, the problem is that in the prior art, after the oil-absorbing cotton has finished absorbing the oil, the process of applying the lubricating oil to the friction position is passive application; that is, the lubricating oil is carried or flowed to the friction position by the relative rotation of the rotating shaft and the sealing component; this method has low application efficiency, uneven application, and poor lubrication effect.

[0005] Therefore, it is necessary to solve the above problems by means of a mechanical seal lubrication device. Utility Model Content

[0006] The purpose of this invention is to provide a mechanical seal lubrication device to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a mechanical seal lubrication device, comprising a piston box, the piston box being fixedly mounted on a housing, and an oil tank being fixedly mounted on the housing;

[0008] A piston plate is slidably installed inside the piston box, and a piston rod is fixedly connected to the piston plate; a return spring is fixedly installed inside the rod cavity of the piston box, and the return spring is sleeved on the piston rod.

[0009] An airbag is fixedly installed inside the rodless chamber of the piston box;

[0010] An oil pipe and a nozzle are fixedly installed on the piston box; the oil pipe connects the oil tank and the air bladder; the nozzle connects to the air bladder.

[0011] Both the nozzle and the oil pipe are equipped with one-way valves.

[0012] The housing is fitted onto the shaft, and a mechanical seal assembly is installed between the housing and the shaft; the mechanical seal assembly includes a rotating ring, a stationary ring, and a compression spring.

[0013] The outer curved wall of the moving ring is provided with an annular oil groove along the circumferential direction. The piston rod is inserted into the annular oil groove radially along the shaft and is in a sealing sliding fit with the housing. The nozzle is inserted into the housing and communicates with the annular oil groove.

[0014] A transmission assembly is installed inside the annular oil groove, and the piston rod is driven by the transmission assembly to engage with the moving ring.

[0015] Preferably, the transmission assembly includes a plurality of protrusions, which are evenly distributed along the circumference of the moving ring and are all fixedly installed in the annular oil groove; the piston rod is in contact with each protrusion for transmission.

[0016] Preferably, the transmission assembly includes a spur rack, a gear, and several arc-shaped racks; the arc-shaped racks are arranged circumferentially along the moving ring, and the several arc-shaped racks are evenly distributed circumferentially along the moving ring and fixedly installed in an annular oil groove; the spur rack is fixed radially to the piston rod along the moving ring; the gear is rotatably mounted on the housing and some of its teeth are located in the annular oil groove; the gear meshes with the spur rack, and the gear is in contact meshing with each arc-shaped rack.

[0017] Preferably, an oil filling pipe is fixedly and connected to the oil tank, and a pipe cap is provided on the oil filling pipe.

[0018] Preferably, the thickness of the protrusion along the axial direction of the moving ring is greater than the thickness of the piston rod along the axial direction of the moving ring.

[0019] Preferably, the width of the arc-shaped rack along the axial direction of the moving ring is greater than the thickness of the gear along the axial direction of the moving ring.

[0020] Preferably, the nozzle is fixedly installed at the opening of the nozzle pipe away from the airbag, and the nozzle is connected to the annular oil groove but does not penetrate into the annular oil groove.

[0021] Preferably, the piston box and oil tank are both integrally formed with the machine housing.

[0022] The technical effects and advantages of this utility model are as follows: When the moving ring of this utility model rotates, it pushes the piston rod to retract into the piston box through the transmission component. The piston rod drives the piston plate to squeeze the air bladder. The lubricating oil in the air bladder is sprayed into the annular oil groove through the spray pipe. Since the lubricating oil sprayed from the air bladder has a certain oil pressure, after the lubricating oil enters the annular oil groove, it actively flows to the friction position under the push of the oil pressure, thereby realizing active coating, thereby improving the coating efficiency, making the coating more uniform, and improving the lubrication effect. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of Embodiment 1 of the present utility model;

[0024] Figure 2 This is a schematic diagram of the interior of the casing according to Embodiment 1 of this utility model;

[0025] Figure 3 This is a schematic diagram of the inside of the piston box according to Embodiment 1 of this utility model;

[0026] Figure 4 This is a schematic diagram of the interior of the casing in Embodiment 2 of this utility model;

[0027] Figure 5 This is a schematic diagram of the inside of the piston box in Embodiment 2 of this utility model.

[0028] In the diagram: 1. Housing; 2. Oil pipe; 3. Shaft; 4. Moving ring; 5. Annular oil groove; 6. Compression spring; 7. One-way valve; 8. Stationary ring; 9. Protrusion; 10. Piston rod; 11. Return spring; 12. Piston plate; 13. Piston box; 14. Airbag; 15. Nozzle; 16. Nozzle head; 17. Oil tank; 18. Arc rack; 19. Gear; 20. Straight rack. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0030] Example 1: This utility model provides the following... Figures 1 to 3 The mechanical seal lubrication device shown includes a piston housing 13. The piston housing 13 is fixedly mounted on a housing 1, and an oil tank 17 is fixedly mounted on the housing 1. Both the piston housing 13 and the oil tank 17 are integrally formed with the housing 1.

[0031] The housing 1 is fitted onto the shaft 3, and a mechanical seal assembly is installed between the housing 1 and the shaft 3. The mechanical seal assembly includes a rotating ring 4, a stationary ring 8, and a compression spring 6.

[0032] Specifically, the moving ring 4 is slidably sleeved on the shaft 3 and rotates synchronously with the shaft 3. The compression spring 6 is located between the two moving rings 4 and is fixedly connected to the two moving rings 4. The stationary ring 8 is rotatably sleeved on the shaft 3 and fixedly connected to the housing 1, with one of the moving rings 4 abutting against the stationary ring 8. This technical feature is prior art and will not be described in detail here.

[0033] The end faces of the rotating ring 4 and the stationary ring 8 that are in contact are made of graphite-hard alloy. Graphite has good self-lubricating properties and a low coefficient of friction when paired with hard alloy, thus achieving optimal friction performance.

[0034] A piston plate 12 is slidably mounted inside the piston box 13, and a piston rod 10 is fixedly connected to the piston plate 12. A return spring 11 is provided in the rod cavity of the piston box 13, and the return spring 11 is sleeved on the piston rod 10. One end of the return spring 11 is fixedly connected to the piston plate 12, and the other end is fixedly connected to the piston box 13.

[0035] An airbag 14 is fixedly installed inside the rodless cavity of the piston box 13, and the piston plate 12 is used to compress and stretch the airbag 14.

[0036] An oil pipe 2 and a nozzle 15 are fixedly installed on the piston box 13. The oil pipe 2 connects the oil tank 17 and the air bladder 14. The nozzle 15 connects to the air bladder 14. A one-way valve 7 is fixedly installed inside both the nozzle 15 and the oil pipe 2.

[0037] An oil filling pipe is fixedly installed on the oil tank 17 and connected to it. A pipe opening cap is installed at the opening of the oil filling pipe away from the oil tank 17.

[0038] An annular oil groove 5 is formed circumferentially on the curved outer wall of one of the moving rings 4. The piston rod 10 is radially inserted into the annular oil groove 5 along the shaft 3 and is in a sealing sliding fit with the housing 1. The nozzle 15, away from the airbag 14, is inserted into the housing 1 and a nozzle 16 is fixedly installed at the nozzle. The nozzle 16 is connected to the annular oil groove 5 but does not penetrate into the annular oil groove 5.

[0039] A transmission assembly is installed inside the annular oil groove 5. The piston rod 10 is driven by the transmission assembly to engage with the moving ring 4, which is used to push the piston rod 10 to slide.

[0040] Specifically, the transmission assembly includes several protrusions 9, which are evenly distributed along the circumference of the moving ring 4 and fixedly installed in the annular oil groove 5. Each protrusion 9 has a transmission ramp at its end away from the shaft 3. The piston rod 10 is in contact with the transmission ramp of each protrusion 9 for transmission engagement.

[0041] The thickness of the protrusion 9 along the axial direction of the moving ring 4 is greater than the thickness of the piston rod 10 along the axial direction of the moving ring 4, so as to ensure that when the moving ring 4 moves slightly along the axial direction of the shaft 3, the protrusion 9 can always rotate to contact the piston rod 10.

[0042] Working principle of Example 1: When a chemical reaction occurs in the xanthation machine reactor, the stirrer stirs the reactants in the reactor. At this time, the shaft 3 rotates and drives the two moving rings 4 to rotate, and the two moving rings 4 drive the compression spring 6 to rotate.

[0043] When the moving ring 4 rotates, it drives all the protrusions 9 to revolve around the shaft 3.

[0044] When the drive ramp of protrusion 9 contacts piston rod 10, protrusion 9 pushes piston rod 10 back into piston box 13. Piston rod 10 pushes piston plate 12 to stretch return spring 11, while piston plate 12 squeezes air bladder 14. At this time, one-way valve 7 in oil pipe 2 closes oil pipe 2, and one-way valve 7 in nozzle 15 opens nozzle 15.

[0045] After the airbag 14 is compressed, the lubricating oil inside is sprayed into the annular oil groove 5 through the nozzle 15 and the spray head 16 in sequence.

[0046] After the transmission ramp of protrusion 9 disengages from piston rod 10, piston plate 12 extends piston rod 10 under the elastic force of return spring 11. At the same time, piston plate 12 extends airbag 14. At this time, one-way valve 7 in oil pipe 2 opens oil pipe 2, and one-way valve 7 in nozzle 15 closes nozzle 15.

[0047] After the airbag 14 is stretched, the lubricating oil in the oil tank 17 enters the airbag 14 through the oil pipe 2.

[0048] As the shaft 3 continues to rotate, lubricating oil is intermittently injected into the annular oil groove 5 and gradually fills it with lubricating oil. Then, due to the presence of liquid pressure, the lubricating oil quickly flows through the gap between the moving ring 4 and the housing 1 to the friction point, thereby replenishing the lubricating oil at the friction point in a timely manner.

[0049] Example 2: This utility model provides the following... Figures 4 to 5 The mechanical seal lubrication device shown in this embodiment differs from Embodiment 1 in that the transmission assembly includes a spur rack 20, a gear 19, and several arc-shaped racks 18. The arc-shaped racks 18 are arranged circumferentially along the moving ring 4, and the several arc-shaped racks 18 are evenly distributed circumferentially along the moving ring 4 and fixedly installed within the annular oil groove 5. The spur rack 20 is radially fixed to the piston rod 10 along the moving ring 4.

[0050] Gear 19 is located within the housing 1 and is rotatably connected to the housing 1. Some of the teeth of gear 19 are located within the annular oil groove 5. Gear 19 meshes with rack 20 and engages with each arc-shaped rack 18 in a contact manner.

[0051] The width of the arc-shaped rack 18 along the axis of the moving ring 4 is greater than the thickness of the gear 19 along the axis of the moving ring 4, so as to ensure that the arc-shaped rack 18 can always mesh with the gear 19 when the moving ring 4 moves slightly along the axis of the shaft 3.

[0052] The working principle of Example 2 is different from that of Example 1 in that when the moving ring 4 rotates, it drives all the arc-shaped racks 18 to revolve around the shaft 3.

[0053] When the arc-shaped rack 18 contacts and meshes with the gear 19, the arc-shaped rack 18 pushes the gear 19 to rotate. The gear 19 pushes the spur rack 20 to move away from the shaft 3, and the spur rack 20 drives the piston rod 10 to retract into the piston box 13.

[0054] After the arc-shaped rack 18 disengages from the gear 19, the piston plate 12, under the elastic force of the return spring 11, drives the piston rod 10 to extend. The piston rod 10 drives the straight rack 20 to move closer to the shaft 3, and the straight rack 20 pushes the gear 19 to reverse.

[0055] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A mechanical seal lubrication device, comprising a piston housing (13), characterized in that: The piston box (13) is fixedly installed on the housing (1), and the oil tank (17) is fixedly installed on the housing (1). A piston plate (12) is slidably installed inside the piston box (13), and a piston rod (10) is fixedly connected to the piston plate (12); a return spring (11) is fixedly installed in the rod cavity of the piston box (13), and the return spring (11) is sleeved on the piston rod (10); An airbag (14) is fixedly installed in the rodless cavity of the piston box (13). An oil pipe (2) and a nozzle (15) are fixedly installed on the piston box (13); the oil pipe (2) connects the oil tank (17) and the air bag (14); the nozzle (15) connects the air bag (14). Both the nozzle (15) and the oil pipe (2) are equipped with one-way valves (7); The housing (1) is sleeved on the shaft (3), and a mechanical seal assembly is installed between the housing (1) and the shaft (3); the mechanical seal assembly includes a dynamic ring (4), a stationary ring (8) and a compression spring (6). The outer curved wall of the moving ring (4) is provided with an annular oil groove (5) along the circumferential direction. The piston rod (10) is inserted radially into the annular oil groove (5) along the shaft (3) and is in a sealing sliding fit with the housing (1). The nozzle (15) is inserted into the housing (1) and connected to the annular oil groove (5). The annular oil groove (5) is equipped with a transmission assembly, and the piston rod (10) is driven by the transmission assembly to engage with the moving ring (4).

2. The mechanical seal lubrication device according to claim 1, characterized in that: The transmission assembly includes several protrusions (9), which are evenly distributed along the circumference of the moving ring (4) and are all fixedly installed in the annular oil groove (5); the piston rod (10) is in contact with each protrusion (9) for transmission.

3. The mechanical seal lubrication device according to claim 1, characterized in that: The transmission assembly includes a rack (20), a gear (19), and several arc-shaped racks (18); the arc-shaped racks (18) are arranged circumferentially along the moving ring (4), and several arc-shaped racks (18) are evenly distributed circumferentially along the moving ring (4) and are all fixedly installed in the annular oil groove (5); the rack (20) is fixed radially along the moving ring (4) on the piston rod (10); the gear (19) is rotatably installed on the housing (1) and some of its teeth are located in the annular oil groove (5); the gear (19) meshes with the rack (20), and the gear (19) is in contact meshing with each arc-shaped rack (18).

4. The mechanical seal lubrication device according to claim 1, characterized in that: An oil filling pipe is fixedly and connected to the oil tank (17), and a pipe cap is provided on the oil filling pipe.

5. A mechanical seal lubrication device according to claim 2, characterized in that: The thickness of the protrusion (9) along the axial direction of the moving ring (4) is greater than the thickness of the piston rod (10) along the axial direction of the moving ring (4).

6. A mechanical seal lubrication device according to claim 3, characterized in that: The width of the arc-shaped rack (18) along the axial direction of the moving ring (4) is greater than the thickness of the gear (19) along the axial direction of the moving ring (4).

7. A mechanical seal lubrication device according to claim 1, characterized in that: The nozzle (16) is fixedly installed at the opening of the nozzle (15) away from the airbag (14). The nozzle (16) is connected to the annular oil groove (5) but does not penetrate into the annular oil groove (5).

8. A mechanical seal lubrication device according to claim 1, characterized in that: The piston box (13) and oil tank (17) are both integrally set with the casing (1).

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