High-pressure gas-pushing sealing structure for acetone heat pump rectification
The high-pressure gas-pushed sealing structure of the heat pump compressor solves the problems of medium leakage and high cost of the sealing structure in the acetone distillation system, achieves medium safety and cost reduction, and adapts to a wide range of working conditions.
Patent Information
- Application Number
- CN202422475296.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-14
- Publication Date
- 2025-09-23
- Estimated Expiration
- 2034-10-14
AI Technical Summary
In acetone distillation systems, the sealing structure of existing heat pump compressors has the risk of medium leakage, is costly, and is difficult to maintain effective sealing under a wide range of operating conditions.
It adopts a high-pressure air-pushing sealing structure, including components such as the inflation chamber, shaft body, sleeve, air-pushing ring and spring, forms a dynamic seal through the air film, and uses air pressure balance to achieve safe and low-cost sealing of the medium.
It improves the adaptability and life of the sealing structure, reduces the sealing cost, ensures the safety and stability of the medium, adapts to a wider range of working conditions, effectively prevents medium leakage, achieves medium safety and reduces sealing costs.
Smart Images
Figure CN223375092U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of acetone heat pump distillation compressors, in particular to a high-pressure gas push sealing structure for acetone heat pump distillation. Background Art
[0002] In the acetone distillation system, the traditional method is steam heat exchange distillation, which has high energy consumption and low heat conversion efficiency. Heat pump distillation has now been used to replace the traditional distillation process. The green energy of the heat pump compressor is used to convert electrical energy into thermal energy, eliminating steam and achieving low-cost and high-efficiency distillation. Due to the flammability, volatility and relatively active chemical properties of acetone, the medium is not allowed to leak into the atmosphere on the acetone distillation compressor, and air and other oxidants are not allowed to enter the medium, posing a safety hazard.
[0003] The heat pump compressor adopts a centrifugal structure, which has the characteristics of high rotation speed and high linear speed at the seal, which is not conducive to sealing the medium. The industry usually adopts: 1. Mechanical seal, but the linear speed of the mechanical seal at the sealing shaft neck cannot be too high. If the linear speed is too high, it is easy to cause the seal to generate too much heat and burn the mechanical seal; 2. Dry gas seal, which is characterized by high sealing precision and can achieve no leakage of the medium, but the cost is very high, and the working conditions are high. The service life is seriously shortened under offset working conditions. For this reason, this application proposes a high-pressure gas push seal structure for acetone heat pump distillation. Utility Model Content
[0004] In order to solve the problems raised in the above background technology, the utility model provides the following technical solutions: a high-pressure gas push sealing structure for acetone heat pump distillation, comprising an air-filled chamber, a shaft body and a shaft sleeve, the shaft sleeve being sleeved on the shaft body, the air-filled chamber being sleeved on the outside of the shaft sleeve, a front pressure cover being closed on the left side of the air-filled chamber, a rear pressure ring being closed on the right side of the air-filled chamber, two gaskets 1, 2 and 3 being sleeved on the inner ring wall of the air-filled chamber from left to right, air push rings being sleeved between the two gaskets 1 and the shaft sleeve, a dynamic ring assembly being provided inside the two air push rings, and the two air push rings being sleeved on the inner ring wall of the air-filled chamber. A sealing ring three is arranged between the corresponding gasket ring one, and springs are arranged on both sides of the two air push rings. An air ring one is sleeved between the inner ring wall of the inflation chamber and the shaft sleeve and between the two air push rings. An air ring two sleeved on the shaft sleeve is arranged between the gasket ring three and the rear pressure cover. An inflation port A, an inflation port B and an inflation port C are provided on one side of the outer wall of the inflation chamber. The inflation port A and the inflation port B are respectively connected to the two air push rings, and the inflation port C is connected to the inflation ring two. An exhaust port D is provided on the other side of the outer wall of the inflation chamber, and the exhaust port D is connected to the inflation ring one.
[0005] Furthermore, carbon rings are sleeved between the backing ring three and the shaft sleeve, and between the rear pressure ring and the shaft sleeve.
[0006] Furthermore, a front pressure cover bolt connected to the inflation chamber thread is inserted through the front pressure cover, a sealing ring is provided between the front pressure cover and the inflation chamber, and a rear pressure ring bolt connected to the inflation chamber thread is inserted through the rear pressure ring.
[0007] Furthermore, a sealing ring 2 is provided at the left end of the sleeve, an anti-rotation pin is provided between the right end of the sleeve and the shaft body, two sealing rings 4 are provided between the inflation ring 1 and the inner wall of the inflation chamber, a sealing ring 6 is provided between the gasket 3 and the inner wall of the inflation chamber, and a sealing ring 5 is provided between the gasket 2 and the inner wall of the inflation chamber.
[0008] Furthermore, the gas push ring is made of ethylene material containing carbon (10-15%).
[0009] Furthermore, the compression amount of the spring = the air thrust, the pressure value of the air thrust is P = between 0.25 and 0.4 MPa, and the axial displacement of the spring is 0 to 1 mm.
[0010] Compared with the prior art, the beneficial effects of the present invention are:
[0011] It can adapt to a wider range of working conditions, has stronger adaptability under non-working conditions, has a long service life, and can effectively prevent the leakage of hazardous media to ensure the safety of the media. The use of an air push structure can reduce sealing costs and reduce users' procurement costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:
[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0014] Figure 2 This is a schematic diagram of the structure of the air push ring of the utility model;
[0015] Figure 3 This is a schematic diagram of the pneumatic propulsion principle of the utility model;
[0016] Figure 4 This is the sealing control flow chart of the utility model;
[0017] In the figure: 1. Inflatable chamber; 2. Front pressure cover bolt; 3. Sealing ring 1; 4. Gasket 1; 5. Sealing ring 2; 6. Spring; 7. Air push ring; 8. Sealing ring 3; 9. Inflatable ring 1; 10. Sealing ring 4; 11. Gasket 2; 12. Rear pressure ring bolt; 13. Gasket 3; 14. Inflatable ring 2; 15. Carbon ring; 16. Anti-rotation pin; 17. Bushing; 18. Rear pressure ring; 19. Dynamic ring assembly. DETAILED DESCRIPTION
[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.
[0019] Depend on Figure 1-4 The utility model includes an air-filling chamber 1, a shaft body and a sleeve 17. The sleeve 17 is sleeved on the shaft body, and the air-filling chamber 1 is sleeved on the outside of the sleeve 17. A front pressure cover is closed on the left side of the air-filling chamber 1, and a rear pressure ring 18 is closed on the right side of the air-filling chamber 1. Two gaskets 14, 11 and 13 are sleeved on the inner ring wall of the air-filling chamber 1 from left to right. An air push ring 7 is sleeved between the two gaskets 14 and the sleeve 17. A dynamic ring assembly 19 is provided inside the two air push rings 7. A sealing ring is provided between the two air push rings 7 and the corresponding gasket 14. Three 8, and springs 6 are provided on both sides of the two air push rings 7, an air ring 9 is sleeved between the inner ring wall of the inflation chamber 1 and the sleeve 17 and between the two air push rings 7, an air ring 2 14 sleeved on the sleeve 17 is provided between the backing ring 3 13 and the rear pressure cover, and an inflation port A, an inflation port B and an inflation port C are provided on one side of the outer wall of the inflation chamber 1, and the inflation port A and the inflation port B are respectively connected to the two air push rings 7, and the inflation port C is connected to the inflation ring 2 14, and an exhaust port D is provided on the other side of the outer wall of the inflation chamber 1, and the exhaust port D is connected to the inflation ring 1 9.
[0020] like Figure 1 As shown, carbon rings 15 are sleeved between the backing ring 13 and the shaft sleeve 17 and between the rear pressure ring 18 and the shaft sleeve 17.
[0021] like Figure 1 As shown, a front pressure cover bolt 2 threadedly connected to the inflation chamber 1 is inserted through the front pressure cover, a sealing ring 3 is provided between the front pressure cover and the inflation chamber 1, and a rear pressure ring bolt 12 threadedly connected to the inflation chamber 1 is inserted through the rear pressure ring 18.
[0022] like Figure 1 As shown, a sealing ring 2 5 is provided at the left end of the sleeve 17, an anti-rotation pin 16 is provided between the right end of the sleeve 17 and the shaft body, two sealing rings 4 10 are provided between the inflation ring 1 9 and the inner wall of the inflation chamber 1, a sealing ring 6 is provided between the gasket 3 13 and the inner wall of the inflation chamber 1, and a sealing ring 5 is provided between the gasket 2 11 and the inner wall of the inflation chamber 1.
[0023] like Figure 1 and Figure 2As shown, the gas push ring 7 is made of ethylene material containing carbon (10-15%), which has good wear resistance and is light in weight. One side is a spring 6 mounting hole to balance the gas pressure, and the other side is grooved to better facilitate the formation of gas pressure buoyancy.
[0024] like Figure 1 and Figure 3 As shown, the compression amount of the spring 6 = the gas thrust, the pressure value of the gas thrust is P = between 0.25 and 0.4 MPa, the axial displacement of the spring 6 is 0 to 1 mm, and the gas thrust is balanced by the spring 6.
[0025] Working principle: Inflation is done through the three air inlets A, B, and C, and exhaust is done through the D port. The air inflated at the A and B ports forms an air film on the air push ring 7, which is balanced by the reaction force of the spring 6. When the compressor is running, there is always flowing sealing gas between the dynamic ring assembly 19 and the air push ring 7. The air push ring 7 and the dynamic ring assembly 19 have no contact. The air source pressure at the B port is higher than that at the A port. The mixed gas is discharged at the D port. The C port serves as the protective gas, and its pressure is higher than that of the A and B ports.
[0026] This device uses the same sealed gas source for inflation. The gas source requires temperature and pressure measurement. Regulating valves are used for pressure control at ports A, B, and C respectively, and pressure transmitters are used for feedback. A differential pressure transmitter is installed between A and B to ensure that the pressure of B ≥ A and the pressure value of C is greater than B. The mixed gas between A and B is discharged at D, and the temperature is measured at D. When the temperature exceeds the target value T (gas source temperature + 30℃), it is considered that there is a medium leakage at A, and the pressure value of A should be increased.
[0027] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.
[0028] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A high-pressure gas push seal structure for acetone heat pump distillation, comprising an air filling chamber (1), a shaft body and a shaft sleeve (17), characterized in that: The shaft sleeve (17) is sleeved on the shaft body, and the inflation chamber (1) is sleeved on the outside of the shaft sleeve (17). A front pressure cover is closed on the left side of the inflation chamber (1), and a rear pressure ring (18) is closed on the right side of the inflation chamber (1). Two gaskets (4), (11) and (13) are sleeved on the inner ring wall of the inflation chamber (1) from left to right. An air push ring (7) is sleeved between the two gaskets (4) and the shaft sleeve (17). A dynamic ring assembly (19) is provided inside the two air push rings (7). A sealing ring (8) is provided between the two air push rings (7) and the corresponding gaskets (4). Springs (6) are provided on both sides of the air push ring (7); an air ring 1 (9) is sleeved between the inner wall of the air chamber (1) and the shaft sleeve (17) and between the two air push rings (7); an air ring 2 (14) sleeved on the shaft sleeve (17) is provided between the backing ring 3 (13) and the rear pressure cover; an air inlet A, an air inlet B and an air inlet C are provided on one side of the outer wall of the air chamber (1); the air inlet A and the air inlet B are respectively connected to the two air push rings (7); the air inlet C is connected to the air inlet 2 (14); an exhaust port D is provided on the other side of the outer wall of the air chamber (1); the exhaust port D is connected to the air inlet ring 1 (9).
2. The high-pressure gas push seal structure for acetone heat pump distillation according to claim 1, characterized in that: A carbon ring (15) is sleeved between the backing ring (13) and the shaft sleeve (17), and between the rear pressure ring (18) and the shaft sleeve (17).
3. The high-pressure gas push seal structure for acetone heat pump distillation according to claim 1, characterized in that: A front pressure cover bolt (2) threadedly connected to the inflation chamber (1) is inserted through the front pressure cover, a sealing ring (3) is provided between the front pressure cover and the inflation chamber (1), and a rear pressure ring bolt (12) threadedly connected to the inflation chamber (1) is inserted through the rear pressure ring (18).
4. The high-pressure gas push seal structure for acetone heat pump distillation according to claim 1, characterized in that: A sealing ring 2 (5) is provided at the left end of the shaft sleeve (17), an anti-rotation pin (16) is provided between the right end of the shaft sleeve (17) and the shaft body, two sealing rings 4 (10) are provided between the inflation ring 1 (9) and the inner wall of the inflation chamber (1), a sealing ring 6 is provided between the gasket ring 3 (13) and the inner wall of the inflation chamber (1), and a sealing ring 5 is provided between the gasket ring 2 (11) and the inner wall of the inflation chamber (1).
5. The high-pressure gas push seal structure for acetone heat pump distillation according to claim 1, characterized in that: The gas push ring (7) is made of ethylene material containing carbon (10-15%).
6. The high-pressure gas push seal structure for acetone heat pump distillation according to claim 1, characterized in that: The compression amount of the spring (6) is equal to the air thrust, the pressure value of the air thrust is P=between 0.25 and 0.4 MPa, and the axial displacement amount of the spring (6) is 0 to 1 mm.