Method of using a self-pumping self-regulating circulation seal system

Abstract

The application discloses a use method of a self-pumping self-adjusting circulating sealing system, which comprises a sealing mechanism body, the sealing mechanism body is sleeved on the outer surface of a rotating shaft, the sealing mechanism body comprises a hollow oil groove, a hollow vortex sealing cavity is connected to the upper surface of the oil groove, an impeller is arranged in the vortex sealing cavity, the impeller is connected to the side surface of the rotating shaft, an outlet pipeline is connected to the lower part of the outer surface of the vortex sealing cavity, one end of the outlet pipeline is communicated with a condensing device, and the other end of the condensing device is connected to the inside of the oil groove through a pipeline. The system utilizes the rotation of the rotating shaft to drive the rotation of the impeller, forms a sealed air pressure flow through the upper blade, and generates centrifugal force through the lower blade to suck the oil mist in the lower oil groove and deliver the oil mist to the condensing device, the oil liquid flows back to the oil groove through the oil return pipeline at the bottom side of the condensing device, part of the air is discharged back to the oil groove through the air outlet, a self-circulating sealing system is formed, the oil mist escaping problem of the bearing sealing of a generator set is effectively solved, and the service life of a power generation wire rod is prolonged.

Description

Technical Field

[0001] This invention belongs to the field of bearing oil tank sealing technology, specifically relating to a method of using a self-pumping, self-regulating circulating sealing system. Background Technology

[0002] Currently, all large rotating machinery in operation is designed with bearing oil tanks. The bearing oil tanks need to hold a large amount of lubricating oil to lubricate and dissipate heat from the bearing bushes. Since the joint between the moving and stationary parts needs to be sealed, the following sealing methods are currently used: contact bearing seals, felt seals, comb seals, and brush seals.

[0003] Oil mist and dust from the bearing oil tank, if left untreated, will accumulate on the insulation layer, corroding the generator coils and other insulation components. This will reduce insulation performance, accelerate aging, and greatly increase the risk of short circuits and breakdowns in the generator coils. This poses a potential hazard to the safe, stable, and reliable operation of the generator, threatening its safe production. Oil leakage and spillage from the generator bearing housing lead to significant turbine oil loss within the generator, creating a poor operating environment. Frequent refilling of the oil tank increases the workload of daily maintenance and the frequency of generator overhauls, resulting in wasted time and labor and raising operating costs.

[0004] Therefore, it is essential to design a method for using a self-pumping, self-regulating circulating sealing system to solve the above problems. Summary of the Invention

[0005] The technical problem to be solved by this invention is to provide a method for using a self-pumping, self-regulating circulating sealing system. This system utilizes the rotation of a shaft to drive the impeller to rotate. Based on the principle of centrifugal force, the sealing air pressure flow formed by the upper blades in the vortex sealing cavity and the centrifugal force generated by the lower blades draw out the oil mist from the lower oil tank. The oil mist is then transported to the condensing device through the outlet pipe, where it condenses into oil. The oil flows back into the oil tank through the return oil pipe on the bottom side of the condensing device, and some air is discharged back into the oil tank through the air outlet, forming a self-circulating sealing system. This effectively solves the problem of oil mist escaping from the generator set bearing seal and extends the service life of the generator rods.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a self-pumping self-regulating circulating sealing system, which includes a sealing mechanism body, which is sleeved on the outer surface of a rotating shaft; the sealing mechanism body includes a hollow oil groove, and a hollow vortex sealing cavity is connected to the upper surface of the oil groove; an impeller is arranged inside the vortex sealing cavity, and the impeller is connected to the side surface of the rotating shaft; an outlet pipe is connected to the lower part of the outer surface of the vortex sealing cavity, one end of the outlet pipe is connected to a condensing device, and the other end of the condensing device is connected to the inside of the oil groove through a pipe.

[0007] Preferably, a gap is arranged between the upper part of the sealing mechanism body and the rotating shaft as an air inlet, and an opening adjusting device is connected to the air inlet, and the opening adjusting device is electrically connected to the automatic control unit.

[0008] Preferably, the impeller comprises upper blades and lower blades, and the inclination angle of the upper blades is adjustable, and a packing seal strip is arranged at the connecting surface of the impeller and the rotating shaft.

[0009] Preferably, at least one auxiliary adjuster is fixedly connected to the upper blades of the impeller, and the auxiliary adjuster is electrically connected to the power storage device; and the auxiliary adjuster is electrically connected to the automatic control unit.

[0010] Preferably, a pressure sensor is connected to the inner wall of the vortex sealing cavity, and the pressure sensor is electrically connected to the automatic control unit.

[0011] Preferably, a gap is arranged between the vortex sealing cavity and the oil groove as an oil mist outlet.

[0012] Preferably, the use method of the self-pumping self-adjusting circulating sealing system comprises the following steps:

[0013] S1, the sealing mechanism body is sleeved on the outer surface of the rotating shaft; the impeller rotates with the rotating shaft, and the upper blades stir to form air pressure flow as sealing air pressure flow in the vortex sealing cavity;

[0014] S2, the pressure sensor on the inner wall of the vortex sealing cavity detects the pressure value in the vortex sealing cavity in real time, and when the pressure value exceeds the set threshold range, the pressure sensor sends an effective signal to the automatic control unit, and the automatic control unit controls the action of the auxiliary adjuster of at least one upper blade to adjust the inclination angle of at least one upper blade, so as to adjust the centrifugal force generated by the rotation of the upper blade to adjust the pressure value in the vortex sealing cavity;

[0015] S3, the pressure sensor on the inner wall of the vortex sealing cavity detects the pressure value in the vortex sealing cavity in real time, and when the pressure value is outside the set threshold range, the pressure sensor sends an effective signal to the automatic control unit, and the automatic control unit controls the opening adjusting device to adjust the opening of the air inlet, so as to adjust the air pressure entering the vortex sealing cavity;

[0016] S4, the lower blades of the impeller rotate to generate centrifugal force, which sucks the escaped oil mist in the lower oil groove into the vortex sealing cavity from the oil mist outlet, and then enters the condensing device to condense into oil liquid through the outlet pipeline on the side surface of the vortex sealing cavity; the oil liquid flows back to the oil groove through the oil return pipeline on the bottom side, and part of the air is discharged back to the oil groove through the outlet pipeline at the air outlet, forming a self-circulating sealing system.

[0017] Preferably, the step S2 and step S3 can be performed synchronously or distributedly; when the pressure in the vortex sealing cavity is kept within a set threshold range, the inclination angle of the upper blade is fixed to the optimal state, and the opening degree regulator is fixed after being adjusted to the optimal distance, and the auxiliary regulator and the opening degree regulator stop working.

[0018] The method for using the self-pumping self-adjusting circulating sealing system has the following advantages:

[0019] (1) The system does not need to use external equipment and power supply to realize system driving, and uses centrifugal force generated by rotation of the rotating shaft to drive the impeller to form a self-circulating sealing system, thereby fully achieving the effects of energy saving and emission reduction and high efficiency and environmental protection; the inclination angle of the impeller and the air inlet opening degree are completely controlled and operated automatically through the program, thereby saving time and effort;

[0020] (2) The system can effectively solve the problem of oil mist escaping from the generator set bearing seal without stopping the generator set, and can effectively solve the problem of oil mist escaping from the generator set bearing seal without affecting the operation of the generator set;

[0021] (3) The system is improved on the basis of the traditional sealing, and uses the air pressure flow formed by the rotation of the impeller to seal, which greatly improves the sealing performance compared with the common large-scale rotating mechanical equipment bearing oil tank sealing form;

[0022] (4) The system effectively solves the problem of oil mist escaping from the generator set, avoids the hazards of corrosion, insulation performance degradation, and accelerated aging caused by oil mist escaping, and effectively improves the safety and stability of the operation of the unit;

[0023] (5) The system has a wide range of applications, and is not limited to the application of large-scale hydroelectric generator set bearing oil tank cover sealing in the hydropower station industry, and can be applied to the sealing of all large-scale rotating mechanical equipment bearing oil tanks. BRIEF DESCRIPTION OF DRAWINGS

[0024] The application will be further described below in combination with the drawings and embodiments:

[0025] Fig. 1 is a cross-sectional structure diagram of the application.

[0026] Fig. 2 is a planar distribution diagram of the application.

[0027] In the drawings, the reference signs are: sealing mechanism body 1, impeller 2, air inlet 3, oil mist outlet 4, power storage device 5, auxiliary regulator 6, vortex sealing cavity 7, pressure sensor 8, automatic control unit 9, opening degree regulator 10, outlet pipeline 11, condensing device 12, packing seal strip 13, rotating shaft 14, oil groove 15. DETAILED DESCRIPTION

[0028] As Figs. 1-2The utility model relates to a kind of self-pumping self-regulating circulation sealing systems, it includes sealing mechanism body 1, sealing mechanism body 1 is sleeved in the outer surface of rotating shaft 14;Sealing mechanism body 1 includes hollow oil groove 15, and hollow vortex seal cavity 7 is connected on the upper surface of oil groove 15;Impeller 2 is provided in vortex seal cavity 7, and impeller 2 is connected in the side surface of rotating shaft 14;Outlet pipeline 11 is connected in the lower part of the outer surface of vortex seal cavity 7, and one end of outlet pipeline 11 is communicated with condensing device 12, and the other end of condensing device 12 is connected with the inside of oil groove 15 by pipeline.

[0029] Preferably, gap is arranged between the upper portion of sealing mechanism body 1 and rotating shaft 14 as air inlet 3, and opening degree adjusting device is connected at air inlet 3, and opening degree adjusting device is electrically connected with automatic control unit 9.

[0030] Preferably, impeller 2 includes upper blade and lower blade, and the inclination angle of upper blade is adjustable;And packing seal strip 13 is arranged at the connecting surface of impeller 2 and rotating shaft 14.

[0031] Preferably, at least one auxiliary regulator 6 is fixedly connected to the upper blade of impeller 2, and auxiliary regulator 6 is electrically connected with power storage device 5;Auxiliary regulator 6 is electrically connected with automatic control unit 9.

[0032] Preferably, pressure sensor 8 is connected to the inner wall of vortex seal cavity 7, and pressure sensor 8 is electrically connected with automatic control unit 9.

[0033] Preferably, gap is arranged between vortex seal cavity 7 and oil groove 15 as oil mist outlet 4.

[0034] Preferably, the use method of the above-mentioned self-pumping self-regulating circulation sealing system is as follows:

[0035] S1, sealing mechanism body is sleeved on the outer surface of rotating shaft;Impeller rotates with rotating shaft, and upper blade stirs in vortex seal cavity to form air pressure flow as sealing air pressure flow;

[0036] S2, pressure sensor of vortex seal cavity inner wall detects the pressure value in vortex seal cavity in real time, when the pressure value exceeds the set threshold range, pressure sensor sends effective signal to automatic control unit, and at least one auxiliary regulator of upper blade is controlled to act through automatic control unit, and the inclination angle of at least one upper blade is adjusted, so that the centrifugal force generated by upper blade rotation is adjusted to adjust the pressure value in vortex seal cavity;

[0037] S3, pressure sensor of vortex seal cavity inner wall detects the pressure value in vortex seal cavity in real time, when the pressure value is out of the set threshold range, pressure sensor sends effective signal to automatic control unit, and opening degree adjusting device is controlled to adjust the opening degree of air inlet through automatic control unit, to adjust the air pressure size entering vortex seal cavity;

[0038] S4, the lower blades of the impeller rotate to generate centrifugal force, which sucks the escaped oil mist in the lower oil groove from the oil mist outlet into the vortex seal cavity, and then enters the condensing device through the outlet pipeline on the side surface of the vortex seal cavity to condense into oil liquid; the oil liquid flows back to the oil groove through the oil return pipeline on the bottom side, and part of the air is discharged back to the oil groove through the outlet pipeline at the air outlet, forming a self-circulating sealing system.

[0039] Preferably, the step S2 and the step S3 can be performed synchronously or distributedly; when the pressure in the vortex seal cavity is kept within a set threshold range, the inclination angle of the upper blades is fixed to an optimal state, and the opening adjuster is fixed after being adjusted to an optimal distance, and the auxiliary adjuster and the opening adjuster stop working.

[0040] The above-described embodiments are merely preferred technical solutions of the present application, and should not be regarded as limitations of the present application. The embodiments in the present application and the features in the embodiments can be combined with each other as long as there is no conflict. The protection scope of the present application should be based on the technical solutions recited in the claims, and the equivalent replacement solutions of the technical features recited in the claims are within the protection scope. That is, the equivalent replacement improvements within this range are also within the protection scope of the present application.

Claims

1. A method of using a self-pumping, self-regulating circulating sealing system, characterized in that: It includes the following steps: S1, the sealing mechanism body (1) is sleeved on the outer surface of the rotating shaft (14); the impeller (2) rotates with the rotating shaft (14), and the upper blades are stirred in the vortex sealing cavity (7) to form a gas pressure flow as a sealing gas pressure flow; S2, the pressure sensor (8) on the inner wall of the vortex sealing cavity (7) detects the pressure value inside the vortex sealing cavity in real time. When the pressure value exceeds the set threshold range, the pressure sensor (8) sends an effective signal to the automatic control unit. The automatic control unit controls the action of the auxiliary regulator (6) of at least one upper blade to adjust the tilt angle of at least one upper blade, thereby adjusting the centrifugal force generated by the rotation of the upper blade to adjust the pressure value inside the vortex sealing cavity (7). S3, the pressure sensor (8) on the inner wall of the vortex sealing cavity (7) detects the pressure value inside the vortex sealing cavity in real time. When the pressure value exceeds the set threshold range, the pressure sensor (8) sends an effective signal to the automatic control unit. The automatic control unit controls the opening regulator (10) to adjust the opening of the air inlet (3) to adjust the wind pressure entering the vortex sealing cavity (7). S4, the lower blades of the impeller (2) rotate to generate centrifugal force, which draws the oil mist escaping from the lower oil tank (15) into the vortex sealing cavity (7) from the oil mist outlet (4), and then enters the condenser (12) through the outlet pipe (11) on the side surface of the vortex sealing cavity (7) to condense into oil. The oil flows back into the oil tank (15) through the return oil pipe on the bottom side, and some air is discharged back into the oil tank through the outlet pipe (11) at the air outlet, forming a self-circulating sealing system. The self-pumping self-regulating circulating sealing system includes a sealing mechanism body (1), which is sleeved on the outer surface of the rotating shaft (14); the sealing mechanism body (1) includes a hollow oil tank (15), and a hollow vortex sealing cavity (7) is connected to the upper surface of the oil tank (15); an impeller (2) is provided inside the vortex sealing cavity (7), and the impeller (2) is connected to the side surface of the rotating shaft (14); an outlet pipe (11) is connected to the lower part of the outer surface of the vortex sealing cavity (7), one end of the outlet pipe (11) is connected to the condensing device (12), and the other end of the condensing device (12) is connected to the inside of the oil tank (15) through a pipe; the upper part of the sealing mechanism body (1) is connected to the rotating shaft (14). A gap is provided between the air inlet (3), and an opening regulator (10) is connected to the air inlet (3). The opening regulator (10) is electrically connected to the automatic control unit (9). The impeller (2) includes an upper blade and a lower blade. The tilt angle of the upper blade is adjustable. A packing seal strip (13) is provided at the connection surface between the impeller (2) and the shaft (14). At least one auxiliary regulator (6) is fixedly connected to the upper blade of the impeller (2). The auxiliary regulator (6) is electrically connected to the energy storage device (5). The auxiliary regulator (6) is electrically connected to the automatic control unit (9). A gap is provided between the vortex sealing cavity (7) and the oil tank (15) as an oil mist outlet (4).

2. The method of using the self-pumping self-regulating circulating sealing system according to claim 1, characterized in that: Steps S2 and S3 can be performed simultaneously or separately; when the pressure in the vortex sealing cavity (7) is kept within the set threshold range, the tilt angle of the upper blade will be fixed to the optimal state, and the opening regulator (10) will be fixed after being adjusted to the optimal distance, and the auxiliary regulator (6) and the opening regulator (10) will stop operating.

3. The method of using the self-pumping self-regulating circulating sealing system according to claim 1, characterized in that: A pressure sensor (8) is connected to the inner wall of the vortex sealing cavity (7), and the pressure sensor (8) is electrically connected to the automatic control unit (9).

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