High-speed moving shaft sealing device for powder equipment

Abstract

The utility model discloses a high-speed moving shaft sealing device for powder equipment. The high-speed moving shaft sealing device comprises a sealing moving ring, a sealing static ring, a high-speed shaft, a sealing seat and a framework oil seal, the sealing moving ring and the high-speed shaft are fixedly assembled in a sleeved mode, and the sealing static ring is fixedly connected with powder equipment. The sealing moving ring and the sealing static ring are assembled in a sleeved mode, and the inner end face of the sealing moving ring is in clearance fit with the end face of the sealing static ring. The sealing seat is assembled with the high-speed shaft in a sleeved mode, a framework oil seal is arranged in the sealing seat, and a blowback air hole and a heat dissipation air hole are formed in the sealing seat. The high-speed moving shaft sealing device has the advantages that sealing is stable and reliable, foreign matter introduction is avoided, temperature rise is reduced, and maintenance and repair cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of sealing, and in particular relates to a high-speed dynamic shaft sealing device for powder equipment. Background Art

[0002] In the powder industry, packing is often used to seal the dynamic shaft of powder equipment. However, due to the characteristics of powder, it is easy to accumulate, which can easily cause the packing seal to wear and fail, and also introduce foreign matter, resulting in poor sealing effect, high temperature rise, and frequent maintenance. Therefore, how to effectively achieve stable and reliable high-speed powder dynamic shaft sealing and avoid the introduction of foreign matter is an urgent problem to be solved. Utility Model Content

[0003] In view of this, the purpose of the utility model is to provide a high-speed dynamic shaft sealing device for powder equipment, so as to achieve stable and reliable sealing, avoid the introduction of foreign matter, reduce temperature rise, and reduce maintenance and repair costs.

[0004] The utility model solves the above problems through the following technical means:

[0005] The utility model provides a high-speed dynamic shaft sealing device for powder equipment, comprising a sealing dynamic ring, a sealing static ring, a high-speed shaft, a sealing seat and a skeleton oil seal; the sealing dynamic ring is fixedly sleeved and assembled with the high-speed shaft, and the sealing static ring is fixedly connected with the powder equipment; the sealing dynamic ring is sleeved and assembled with the sealing static ring, and the inner end face of the sealing dynamic ring and the end face of the sealing static ring are gap-matched; the sealing seat is sleeved and assembled with the high-speed shaft, a skeleton oil seal is arranged in the sealing seat, and a back-blowing air hole and a heat dissipation air hole are opened on the sealing seat.

[0006] Furthermore, a dynamic ring sealing spiral is provided on the inner side surface of the sealing dynamic ring, and a first spiral seal is formed between the dynamic ring sealing spiral and the side surface of the sealing static ring.

[0007] Furthermore, the sealing static ring is provided with a static ring shaft hole, the high-speed shaft passes through the static ring shaft hole, a high-speed shaft sealing spiral is arranged on the side wall of the high-speed shaft, and a second spiral seal is formed between the high-speed shaft sealing spiral and the static ring shaft hole.

[0008] Furthermore, the spiral rotation direction of the dynamic ring sealing spiral is opposite to that of the high-speed shaft sealing spiral.

[0009] Furthermore, the inner end surface of the sealing dynamic ring is provided with dynamic ring labyrinth sealing teeth.

[0010] Furthermore, the end surface of the sealing static ring is provided with static ring labyrinth sealing teeth.

[0011] Furthermore, the moving ring labyrinth seal teeth and the stationary ring labyrinth seal teeth mesh with each other to form a labyrinth seal.

[0012] Furthermore, an air guide ring is arranged in the sealing seat, the air guide ring is aligned with the heat dissipation holes, an annular air equalization groove is arranged on the outer side wall of the air guide ring, and a plurality of air equalization holes are evenly arranged on the bottom of the air equalization groove in the circumferential direction.

[0013] Furthermore, the sealing static ring is provided with a static ring connecting section, and the static ring connecting section is threadedly connected to the powder equipment.

[0014] Beneficial effects of the utility model:

[0015] The utility model is a high-speed dynamic shaft sealing device for powder equipment, comprising a sealing dynamic ring, a sealing static ring, a high-speed shaft, a sealing seat and a skeleton oil seal; the sealing dynamic ring and the high-speed shaft are designed with a spiral structure and are positioned and assembled along the axial direction and can rotate synchronously; the sealing dynamic ring and the sealing static ring are provided with labyrinth sealing teeth to form a labyrinth seal; the sealing seat is designed with back-blowing air holes and heat dissipation air holes. When working, the sealing dynamic ring and the high-speed shaft rotate at high speed under power drive, which can push the powder material invading the sealing device to the outside of the sealing device, and the sealing dynamic ring and the sealing static ring rely on the labyrinth sealing teeth to form a labyrinth seal, which can block most of the powder material, and only a small part of the powder material dust enters the sealing system; the skeleton oil seal serves as the second sealing line of defense, blocking the invasion of powder material dust. Then, through the control of the electronic control program, the compressed gas is continuously or intermittently introduced from the back-blowing air holes and the heat dissipation air holes to clean the dust of the powder material invading the sealing device, and at the same time, the heat generated by the friction of the high-speed shaft rotation is taken away, which effectively reduces the temperature rise of the sealing device, avoids the introduction of foreign matter, reduces the maintenance cost, and realizes a stable and reliable dynamic shaft seal of the powder equipment. It indirectly improves the production efficiency of the enterprise, reduces the operating cost of the enterprise, and solves the problems existing in the existing technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0017] Figure 1 It is a cross-sectional view of a preferred embodiment of the utility model.

[0018] Figure 2 It is a schematic diagram of the three-dimensional structure of the sealing dynamic ring.

[0019] Figure 3 It is a cross-sectional view of the sealing dynamic ring.

[0020] Figure 4 It is a schematic diagram of the three-dimensional structure of the sealing static ring.

[0021] Figure 5 It is a cross-sectional view of the sealing static ring.

[0022] Figure 6 It is a schematic diagram of the three-dimensional structure of the high-speed shaft.

[0023] Figure 7 It is a side view of the high-speed shaft.

[0024] Figure 8 It is the front view of the sealing seat.

[0025] Fig. 9 It is a schematic diagram of the three-dimensional structure of the sealing seat.

[0026] Fig.10 It is a schematic diagram of the three-dimensional structure of the gas guide ring.

[0027] Fig.11 It is a cross-sectional view of the gas guide ring.

[0028] Reference numerals:

[0029] Sealing dynamic ring 1, dynamic ring labyrinth sealing teeth 1-1, dynamic ring sealing spiral 1-2, sealing static ring 2, static ring labyrinth sealing teeth 2-1, static ring shaft hole 2-2, static ring connecting section 2-3, high-speed shaft 3, high-speed shaft sealing spiral 3-1, sealing seat 4, backblowing air hole 4-1, heat dissipation air hole 4-2, skeleton oil seal 5, air guide ring 6, air equalizing groove 6-1, air equalizing hole 6-2, first spiral seal e1, labyrinth seal e2, second spiral seal e3. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below through the accompanying drawings and embodiments. Through these descriptions, the features and advantages of the present invention will become clearer and more specific. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them.

[0031] like Figures 1 to 11 As shown, this embodiment discloses a high-speed dynamic shaft sealing device for powder equipment, including a sealing dynamic ring 1, a sealing static ring 2, a high-speed shaft 3, a sealing seat 4, a skeleton oil seal 5 and an air guide ring 6; the sealing dynamic ring 1 is fixedly sleeved and assembled with the high-speed shaft 3, and the sealing static ring 2 is fixedly connected with the powder equipment. Specifically, the sealing static ring 2 is provided with a static ring connecting section 2-3, and the static ring connecting section 2-3 is threadedly connected with the powder equipment; the sealing dynamic ring 1 is sleeved and assembled with the sealing static ring 2, and the inner end surface of the sealing dynamic ring 1 is connected to the sealing static ring 2. The end faces of the rings 2 can be fitted with clearance, or a corresponding sawtooth structure can be added to improve the sealing performance, for example: a dynamic ring labyrinth seal tooth 1-1 is set on the inner end face of the sealing dynamic ring 1, or a static ring labyrinth seal tooth 2-1 is set on the end face of the sealing static ring 2; in this embodiment, the inner end face of the sealing dynamic ring 1 is provided with a dynamic ring labyrinth seal tooth 1-1, and the end face of the sealing static ring 2 is provided with a static ring labyrinth seal tooth 2-1, and the dynamic ring labyrinth seal tooth 1-1 cooperates with the static ring labyrinth seal tooth 2-1 to form a labyrinth seal e2. The sealing seat 4 is assembled with the high-speed shaft sleeve, and a skeleton oil seal 5 is set in the sealing seat.

[0032] The inner side of the sealing dynamic ring 1 is provided with a dynamic ring sealing spiral 1-2, and a first spiral seal e1 is formed between the dynamic ring sealing spiral 1-2 and the side of the sealing static ring 2. The sealing static ring is provided with a static ring shaft hole 2-2, and the high-speed shaft passes through the static ring shaft hole. A high-speed shaft sealing spiral 3-1 is provided on the side wall of the high-speed shaft, and a second spiral seal e3 is formed between the high-speed shaft sealing spiral 3-1 and the static ring shaft hole. The spiral rotation direction of the dynamic ring sealing spiral is opposite to that of the high-speed shaft sealing spiral; the dynamic ring sealing spiral and the high-speed shaft sealing spiral are continuous spirals or intermittent spirals. The spiral structure is designed to push the powder material to the outside of the sealing device when the sealing dynamic ring and the high-speed shaft rotate.

[0033] The sealing seat 4 is provided with a back-blowing hole 4-1 and a heat dissipation hole 4-2. An air guide ring 6 is provided inside the sealing seat, and the air guide ring 6 is aligned with the heat dissipation hole 4-2. The outer wall of the air guide ring is provided with an annular gas equalization groove 6-1, and a plurality of gas equalization holes 6-2 are evenly provided in the bottom of the gas equalization groove in a circumferential direction. Gas is continuously or intermittently introduced through the back-blowing hole to back-blow and clean the powder material; gas is continuously or intermittently introduced through the heat dissipation hole to take away the heat; the air guide ring makes the gas introduced into the heat dissipation hole flow more evenly.

[0034] In addition, in order to realize the assembly of the skeleton oil seal, etc., corresponding pressure covers are equipped, corresponding shaft shoulders are processed, etc. This is the existing technology and will not be repeated here.

[0035] The specific structure of this embodiment is further described below:

[0036] The high-speed dynamic shaft sealing device for powder equipment of the present application is provided with two sealing lines of defense, the first sealing line of defense is composed of a sealing dynamic ring 1, a sealing static ring 2, and a high-speed shaft 3; the second sealing line of defense is composed of a sealing seat 4, an air guide ring 6, and a skeleton oil seal 5.

[0037] In the first sealing defense line, the static ring connection section 2-3 of the sealing static ring 2 is provided with a threaded structure, which is fixed to the powder equipment through threaded connection; the sealing dynamic ring 1 is fixedly assembled with the high-speed shaft 3, and can rotate synchronously at high speed under power drive; the sealing dynamic ring 1 is provided with a dynamic ring sealing spiral 1-2, and the high-speed shaft 3 is provided with a high-speed shaft sealing spiral 3-1, and the two spirals rotate in opposite directions, and the purpose is to push the powder material out of the sealing device when rotating at high speed. The high-speed shaft 3 passes through the static ring shaft hole 2-2, and the high-speed shaft sealing spiral 3-1 and the static ring shaft hole 2-2 form a second spiral seal e3; the dynamic ring labyrinth seal teeth 1-1 and the static ring labyrinth seal teeth 2-1 cooperate with each other to form a labyrinth seal e2; the dynamic ring sealing spiral 1-2 and the sealing static ring 2 form a first spiral seal e1.

[0038] In the second sealing defense line, the skeleton oil seal 5 and the air guide ring 6 are installed in the sealing seat 4, and the heat dissipation holes 4-2 of the sealing seat 4 are aligned with the same cross section as the air guide ring 6.

[0039] During operation, the sealing dynamic ring 1 and the high-speed shaft 3 rotate at high speed under the power drive. The dynamic ring sealing spiral 1-2 and the high-speed shaft sealing spiral 3-1 can push the powder material invading the sealing device to the outside of the sealing device. In cooperation with the labyrinth seal e2, most of the powder material can be blocked, and only a small part of the powder material dust enters the sealing system; the skeleton oil seal 5 serves as the second sealing defense line to block the invasion of powder material dust. Then, through the control of the electronic control program, the compressed gas is continuously or intermittently introduced from the back-blowing air hole 4-1 of the sealing seat 4, so that the powder material dust invading the sealing device can be cleaned, and a reliable high-speed dynamic shaft seal of the powder equipment can be achieved. In addition, due to the long-term operation of the high-speed shaft 3, the rotation friction generates huge heat, causing a large amount of temperature rise. The compressed air can be introduced through the heat dissipation air hole 4-2, and the air can be guided through the air-distributing groove 6-1 and the air-distributing hole 6-2 of the air guide ring 6 to increase the convection area and take away the heat, thereby reducing the temperature rise of the high-speed dynamic shaft seal of the powder equipment, solving the problems existing in the prior art.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A high-speed dynamic shaft sealing device for powder equipment, characterized in that: It includes a sealing dynamic ring, a sealing static ring, a high-speed shaft, a sealing seat and a skeleton oil seal; the sealing dynamic ring is fixedly sleeved and assembled with the high-speed shaft, and the sealing static ring is fixedly connected with the powder equipment; the sealing dynamic ring is sleeved and assembled with the sealing static ring, and the inner end face of the sealing dynamic ring and the end face of the sealing static ring are gap-matched; the sealing seat is sleeved and assembled with the high-speed shaft, a skeleton oil seal is arranged in the sealing seat, and back-blowing air holes and heat dissipation air holes are opened on the sealing seat.

2. The high-speed dynamic shaft sealing device for powder equipment according to claim 1, characterized in that: The inner side surface of the sealing dynamic ring is provided with a dynamic ring sealing spiral, and a first spiral seal is formed between the dynamic ring sealing spiral and the side surface of the sealing static ring.

3. The high-speed dynamic shaft sealing device for powder equipment according to claim 2, characterized in that: The sealing static ring is provided with a static ring shaft hole, the high-speed shaft passes through the static ring shaft hole, a high-speed shaft sealing spiral is arranged on the side wall of the high-speed shaft, and a second spiral seal is formed between the high-speed shaft sealing spiral and the static ring shaft hole.

4. The high-speed dynamic shaft sealing device for powder equipment according to claim 3, characterized in that: The spiral direction of the dynamic ring sealing spiral is opposite to that of the high-speed shaft sealing spiral.

5. The high-speed dynamic shaft sealing device for powder equipment according to claim 4, characterized in that: The inner end surface of the sealing dynamic ring is provided with dynamic ring labyrinth sealing teeth.

6. The high-speed dynamic shaft sealing device for powder equipment according to claim 5, characterized in that: The end surface of the sealing static ring is provided with static ring labyrinth sealing teeth.

7. The high-speed dynamic shaft sealing device for powder equipment according to claim 6, characterized in that: The moving ring labyrinth seal teeth and the stationary ring labyrinth seal teeth mesh with each other to form a labyrinth seal.

8. The high-speed dynamic shaft sealing device for powder equipment according to any one of claims 1 to 7, characterized in that: An air guide ring is arranged in the sealing seat, and the air guide ring is aligned with the heat dissipation holes. An annular air equalization groove is arranged on the outer wall of the air guide ring, and a plurality of air equalization holes are evenly opened in the circumferential direction of the groove bottom of the air equalization groove.

9. The high-speed dynamic shaft sealing device for powder equipment according to claim 8, characterized in that: The sealing static ring is provided with a static ring connecting section, and the static ring connecting section is threadedly connected to the powder equipment.

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