Air isolation type shaft sealing device

Abstract

The utility model discloses an air isolation type shaft sealing device, and relates to the technical field of boiler auxiliary equipment. The motor comprises a motor shell plate and a rotating shaft rotationally connected in the motor shell plate, and further comprises a mounting groove body formed in the right side of the motor shell plate, and a mounting ring plate is embedded in the mounting groove body; the side pressure sealing assembly is arranged in the mounting groove body, and the axial sealing assembly is arranged in the mounting groove body. An oil medium can be added into the oil cavity through the arranged oil injection hole, the oil medium can wrap the outer wall of the rotating shaft, certain lubricity is achieved, meanwhile, high-temperature gas is prevented from entering the oil cavity in the axial direction, the arranged trapezoid sealing piece can be clamped in the clamping groove body in a sliding mode, the oil medium is prevented from flowing out, and the sealing effect is good. And the trapezoidal sealing piece has better anti-pressure capability, and high-temperature gas is difficult to enter under certain pressure intensity, so that the high-temperature gas is completely isolated, and the service life of equipment is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of boiler auxiliary equipment, in particular to an air-isolated shaft sealing device. Background Art

[0002] Boiler auxiliary equipment refers to the supporting equipment of the boiler, which is a relatively general concept. The auxiliary equipment of electric boilers, oil boilers, gas boilers, and coal-fired boilers are not the same. The auxiliary equipment of boiling water boilers, hot water boilers, heating boilers, bath boilers, and steam boilers are even more different. In general, boiler auxiliary equipment includes: electric heating tubes, burners, boiler water treatment equipment, water pumps, instruments, valves, grates, economizers, blowers, induced draft fans, dust collectors, chimneys, high-efficiency economizers, etc.

[0003] Boiler auxiliary equipment requires rotating parts, such as pumps, fans, and motors. However, after long-term use, problems may occur in the shaft sealing structure, making it difficult to completely block high-temperature steam. High-temperature steam approaches the motor, which will seriously affect the service life of the equipment. Therefore, we propose an air-isolated shaft sealing device to solve this problem. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the prior art, the utility model provides an air-insulated shaft sealing device, which can effectively solve the problems of the prior art.

[0005] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0006] The utility model is an air-insulated shaft sealing device, comprising a motor shell plate and a rotating shaft rotatably connected inside the motor shell plate, and also comprising:

[0007] The installation slot is opened on the right side of the motor shell plate, and a mounting ring plate is embedded in the interior of the installation slot;

[0008] A side pressure seal assembly is arranged inside the mounting groove body and is used to isolate the side of the mounting ring plate to prevent gas from flowing through the side;

[0009] The axial sealing assembly is arranged inside the mounting groove body and is used to prevent the gas from entering in the axial direction.

[0010] Furthermore, the side pressure sealing assembly includes a sealing groove body and an O-ring. The sealing groove bodies are evenly distributed and opened inside the mounting groove body, and two groups of sealing groove bodies are opened. The annular inner diameter of the sealing groove body close to the rotating axis direction decreases successively, and the O-ring is evenly distributed and embedded in the interior of the sealing groove body.

[0011] Furthermore, threaded holes are distributed on the inner circumference of the installation groove body, and screws can be passed through the inside of the installation ring plate and screwed into the inside of the threaded holes.

[0012] Furthermore, the axial sealing assembly includes a snap-in groove body, a trapezoidal seal and an oil chamber. The snap-in groove body is linearly distributed and opened on the outer wall of the rotating shaft. The trapezoidal seal is slidably snap-into the inside of the snap-in groove body. The oil chamber is opened inside the oil chamber. A convex ring is arranged at the central position of the inner wall of the mounting ring plate, and the conveying groove of the inner wall of the oil chamber is located at the center of the convex ring. The oil medium arranged inside the oil chamber can contact the rotating shaft, and the convex ring is located between the two groups of trapezoidal seals.

[0013] Furthermore, an oil filling hole is provided at the upper end of the mounting ring plate, and the oil filling hole can be connected to the oil cavity, and the oil filling hole is sealed by a sealing plug.

[0014] The utility model has the following beneficial effects:

[0015] 1. The utility model can add oil medium to the inside of the oil cavity through the oil filling hole, and the oil medium can wrap the outer wall of the rotating shaft to play a certain lubrication role, while isolating the high-temperature gas from entering in the axial direction. In addition, the trapezoidal seal can be slidably engaged in the inside of the engaging groove to block the outflow of the oil medium. The trapezoidal seal has better pressure resistance, and it is difficult for high-temperature gas to enter under a certain pressure, thereby achieving complete isolation of the high-temperature gas and improving the service life of the equipment.

[0016] 2. The utility model can lock and limit the mounting ring plate by passing screws through the inside of the mounting ring plate, and then the mounting ring plate can be locked and limited inside the mounting groove body. The mounting groove body can also play a certain sealing effect. During the locking process, the mounting ring plate can produce a certain extrusion on the O-ring, causing it to undergo a certain deformation inside the sealing groove body. Through the extrusion deformation of multiple groups of O-rings, the installation sealing of the mounting ring plate can be improved to prevent high-temperature gas from entering from the side of the mounting ring plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a top view schematic diagram of the air-isolated shaft sealing device of the utility model;

[0019] Figure 2 This is an explosion diagram of the air-isolated shaft sealing device of the utility model;

[0020] Figure 3 It is a cross-sectional schematic diagram of the air-insulated shaft sealing device of the utility model.

[0021] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0022] 1. Motor housing plate; 2. Rotating shaft; 3. Mounting slot; 4. Threaded hole; 5. Sealing slot; 6. Mounting ring plate; 7. Oil filling hole; 8. O-ring; 9. Snap-on slot; 10. Trapezoidal seal; 11. Oil chamber. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0024] See also Figure 1-3 As shown, the utility model is an air-insulated shaft sealing device, comprising a motor housing plate 1 and a rotating shaft 2 rotatably connected inside the motor housing plate 1, and further comprising:

[0025] The mounting groove 3 is provided on the right side of the motor housing plate 1, and a mounting ring plate 6 is embedded in the mounting groove 3. The inner circumference of the mounting groove 3 is provided with threaded holes 4, and screws can be passed through the mounting ring plate 6 to lock and limit the mounting ring plate 6, so that the mounting ring plate 6 can be locked and limited in the mounting groove 3, and the mounting groove 3 can also play a certain sealing effect;

[0026] The side pressure seal assembly is arranged inside the installation groove body 3 and is used to isolate the side of the installation ring plate 6 to prevent gas from flowing through the side. The side pressure seal assembly includes a sealing groove body 5 and an O-ring 8. The sealing groove body 5 is evenly distributed and opened inside the installation groove body 3, and the sealing groove body 5 is opened with two groups. The annular inner diameter of the sealing groove body 5 close to the rotating shaft 2 is reduced successively. The O-ring 8 is evenly distributed and embedded inside the sealing groove body 5. During the locking process, the installation ring plate 6 can produce a certain amount of extrusion on the O-ring 8, causing it to undergo a certain deformation inside the sealing groove body 5. Through the extrusion deformation of multiple groups of O-rings 8, the installation sealing of the installation ring plate 6 can be improved to prevent high-temperature gas from entering from the side of the installation ring plate 6;

[0027] The axial sealing assembly is arranged inside the mounting groove body 3 and is used to prevent the entry of gas in the axial direction. The axial sealing assembly includes a snap-in groove body 9, a trapezoidal seal 10 and an oil chamber 11. The snap-in groove body 9 is linearly distributed and opened on the outer wall of the rotating shaft 2. The trapezoidal seal 10 is slidably snap-into the inside of the snap-in groove body 9. The oil chamber 11 is opened inside the oil chamber 11. A convex ring is arranged at the central position of the inner wall of the mounting ring plate 6, and the conveying groove of the inner wall of the oil chamber 11 is located at the center of the convex ring. The oil medium arranged inside the oil chamber 11 can contact the rotating shaft 2. The convex ring is located between the two groups of trapezoidal seals 10, so that a cavity can be formed between the convex ring and the two groups of trapezoidal seals 10, and the lubricating oil in the oil chamber 11 is introduced into the cavity. The oil filling hole 7 is provided at the upper end of the mounting ring plate 6, and the oil filling hole 7 can be connected to the oil cavity 11. The oil filling hole 7 is sealed with a sealing plug, and the oil medium can be added to the oil cavity 11 through the provided oil filling hole 7. The oil medium can wrap the outer wall of the rotating shaft 2 to achieve a certain lubricity and isolate the high-temperature gas from entering in the axial direction. In addition, the provided trapezoidal seal 10 can be slidably engaged in the interior of the engaging groove 9 to block the outflow of the oil medium. The trapezoidal seal 10 has better pressure resistance, and the high-temperature gas is difficult to enter under a certain pressure, thereby completely isolating the high-temperature gas and improving the service life of the equipment.

[0028] Working principle: First, the installation slot 3 is opened on the right side of the motor shell plate 1, and the installation slot 3 is embedded with a mounting ring plate 6. The mounting ring plate 6 can be locked and limited by screws running through the inside of the mounting ring plate 6, and then the mounting ring plate 6 can be locked and limited inside the installation slot 3. The installation slot 3 can also play a certain sealing effect. During the locking process, the mounting ring plate 6 can produce a certain extrusion on the O-ring 8, causing it to undergo a certain deformation inside the sealing slot 5. Through the extrusion and deformation of multiple groups of O-rings 8, the installation sealing of the mounting ring plate 6 can be improved to prevent high-temperature gas from entering from the side of the mounting ring plate 6;

[0029] Then, oil medium can be added to the interior of the oil chamber 11 through the oil filling hole 7. The oil medium can wrap the outer wall of the rotating shaft 2 to achieve a certain lubricity and at the same time isolate the high-temperature gas from entering in the axial direction. In addition, the trapezoidal seal 10 can be slidably engaged in the interior of the engaging groove 9 to block the outflow of the oil medium. The trapezoidal seal 10 has better pressure resistance, and it is difficult for high-temperature gas to enter under a certain pressure, thereby achieving complete isolation of the high-temperature gas and improving the service life of the equipment.

[0030] The above are only preferred embodiments of the present invention and do not limit the present invention. Any modification to the technical solutions recorded in the aforementioned embodiments and any equivalent replacement of some of the technical features therein, any modification, equivalent replacement, and improvement made are all within the protection scope of the present invention.

Claims

1. An air-insulated shaft sealing device, comprising a motor housing (1) and a rotating shaft (2) rotatably connected inside the motor housing (1), characterized in that: Also includes: An installation slot (3) is provided on the right side of the motor housing plate (1), and an installation ring plate (6) is embedded in the interior of the installation slot (3); A side pressure sealing assembly is arranged inside the mounting groove body (3) and is used to isolate the side of the mounting ring plate (6) to prevent gas from flowing through the side; An axial sealing component is arranged inside the mounting groove body (3) and is used to prevent gas from entering in the axial direction.

2. The air-insulated shaft sealing device according to claim 1, characterized in that: The side pressure seal assembly comprises a sealing groove body (5) and an O-type sealing ring (8), wherein the sealing groove body (5) is evenly distributed and opened inside the mounting groove body (3), and the sealing groove body (5) is provided with two groups, wherein the annular inner diameter of the sealing groove body (5) close to the rotating shaft (2) decreases successively, and the O-type sealing ring (8) is evenly distributed and embedded inside the sealing groove body (5).

3. The air-insulated shaft sealing device according to claim 1, characterized in that: The inner circumference of the mounting groove body (3) is provided with threaded holes (4), which can be penetrated through the inside of the mounting ring plate (6) and screwed into the inside of the threaded holes (4).

4. The air-insulated shaft sealing device according to claim 1, characterized in that: The axial seal assembly comprises a snap-fit ​​groove body (9), a trapezoidal seal (10) and an oil chamber (11); the snap-fit ​​groove body (9) is linearly distributed and opened on the outer wall of the rotating shaft (2); the trapezoidal seal (10) is slidably snap-fitted inside the snap-fit ​​groove body (9); the oil chamber (11) is opened inside the oil chamber (11); a convex ring is arranged at the central position of the inner wall of the mounting ring plate (6); a conveying groove opening on the inner wall of the oil chamber (11) is located at the center of the convex ring; an oil medium is arranged inside the oil chamber (11) and can contact the rotating shaft (2); and the convex ring is located between two groups of trapezoidal seals (10).

5. The air-insulated shaft sealing device according to claim 4, characterized in that: An oil filling hole (7) is provided at the upper end of the mounting ring plate (6), and the oil filling hole (7) can be connected to the oil chamber (11), and the oil filling hole (7) is sealed by a sealing plug.

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