Mechanical sealing device for high-temperature melt pump

Abstract

The utility model relates to the field of high-temperature melt pump equipment, and discloses a mechanical sealing device for a high-temperature melt pump, which comprises a shaft sleeve, a shaft sleeve O-shaped ring is arranged on the inner side of the shaft sleeve, an enclasping ring is arranged outside the shaft sleeve, an enclasping ring screw is arranged inside the enclasping ring, a movable ring seat is arranged outside the shaft sleeve, and the movable ring seat is connected with the shaft sleeve O-shaped ring. A transmission jackscrew is arranged inside the movable ring seat, a packaging piece is arranged outside the movable ring seat, a packaging piece screw is arranged inside the packaging piece, a packaging piece screw is arranged inside the movable ring seat, a movable ring seat O-shaped ring is arranged on the inner side of the movable ring seat, and a movable ring O-shaped ring is arranged outside the movable ring seat. According to the utility model, the front seal is arranged outside the sealing moving ring, a high-temperature solution is effectively isolated from the inner side seal, a medium is prevented from entering the sealing end surface, and the pumping spiral is processed through the matching of the shaft sleeve and the sealing box, so that the inner and outer side sealing end surfaces are effectively lubricated and cooled.

Description

Technical Field

[0001] The utility model relates to the field of high-temperature melt pump equipment, in particular to a mechanical seal device for a high-temperature melt pump. Background Technique

[0002] With the increasingly fierce competition among domestic plastic processing enterprises, people have to pay more attention to the high-quality and high-precision requirements for extruded products; the requirements for material saving and energy saving in the extrusion process, as well as the requirements for high productivity and low energy consumption of processing equipment. Adopting melt pump technology as soon as possible is an effective and wise move to meet these requirements.

[0003] The melt pump is mainly used for the transportation, pressurization, and metering of high-temperature and high-viscosity polymer melts. Its main function is to pressurize and stabilize the high-temperature melt from the extruder and send the melt into the extrusion head accurately and stably while maintaining the melt flow rate.

[0004] However, under high-temperature working conditions, the fluid film on the sealing end face vaporizes, resulting in dry friction, which causes lubrication leakage into the pump cavity and contaminates the medium. Content of the Utility Model

[0005] In order to make up for the above deficiencies, the utility model provides a mechanical seal device for a high-temperature melt pump, aiming to improve the problem that under high-temperature working conditions, the fluid film on the sealing end face vaporizes, resulting in dry friction, which causes lubrication leakage into the pump cavity and contaminates the medium in the prior art.

[0006] To achieve the above object, the utility model provides the following technical solution: A mechanical seal device for a high-temperature melt pump, including a shaft sleeve, an O-ring of the shaft sleeve is arranged inside the shaft sleeve, a clamping ring is arranged outside the shaft sleeve, clamping ring screws are arranged inside the clamping ring, a moving ring seat is arranged outside the shaft sleeve, a driving setscrew is arranged inside the moving ring seat, a mounting piece is arranged outside the moving ring seat, mounting piece screws are arranged inside the mounting piece, mounting piece screws are arranged inside the moving ring seat, an O-ring of the moving ring seat is arranged inside the moving ring seat, and an O-ring of the moving ring is arranged outside the moving ring seat.

[0007] Further, a seal box is arranged outside the shaft sleeve, a shaft seal pressing plate is arranged outside the seal box, equipment connection bolts are arranged inside the shaft seal pressing plate, equipment connection bolts are arranged inside the seal box, a moving ring snap ring is arranged outside the shaft sleeve, a stationary ring is arranged inside the seal box, and a push ring is arranged inside the stationary ring.

[0008] Further, an O-ring of the stationary ring is arranged on the inner side of the seal box, a spring is arranged on the inner side of the seal box, a connecting bolt is arranged inside the seal box, the connecting bolt is arranged inside the shaft seal pressing plate, a rotary shaft seal is arranged on the inner side of the shaft seal pressing plate, a high-temperature graphite gasket is arranged on the outer side of the shaft seal pressing plate, and a high-temperature graphite gasket is arranged on the inner side of the seal box.

[0009] Further, a moving ring is arranged on the outside of the moving ring seat, and an O-ring of the moving ring is arranged on the inner side of the moving ring.

[0010] The utility model has the following beneficial effects:

[0011] 1. In the utility model, a hydrodynamic pressure groove is formed on the end face of the moving ring of the mechanical seal device to lubricate and cool the seal end face, so as to ensure that the seal end face and other key components will not overheat or be damaged in a high-temperature environment.

[0012] 2. In the utility model, a pre-seal is arranged outside the moving ring of the mechanical seal device to effectively isolate the high-temperature melt from the inner seal and prevent the medium from entering the seal end face.

[0013] 3. In the utility model, a pumping spiral is machined on the shaft sleeve and the seal box in cooperation to effectively lubricate and cool the inner and outer seal end faces. Description of the Drawings

[0014] Figure 1 is the front view of a mechanical seal device for a high-temperature melt pump proposed by the utility model;

[0015] Figure 2 is the sectional view of a mechanical seal device for a high-temperature melt pump proposed by the utility model.

[0016] Legend:

[0017] 1. Shaft seal pressing plate; 2. Shaft sleeve; 3. Moving ring snap ring; 4. Stationary ring; 5. Pushing ring; 6. Seal box; 7. Equipment connecting bolt; 8. Moving ring; 9. Moving ring seat; 10. Driving setscrew; 11. Clamping ring; 12. Clamping ring screw; 13. Assembly piece; 14. Assembly piece screw; 15. O-ring of moving ring seat; 16. O-ring of moving ring; 17. O-ring of stationary ring; 18. Spring; 19. Connecting bolt; 20. High-temperature graphite gasket; 21. Rotary shaft seal; 22. O-ring of shaft sleeve. Detailed Embodiment

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0019] Referring to Figure 1 and Figure 2 , an embodiment provided by the present invention: a mechanical seal device for a high-temperature melt pump, including a shaft sleeve 2, with a shaft sleeve O-ring 22 arranged inside the shaft sleeve 2, a clamping ring 11 arranged outside the shaft sleeve 2, a clamping ring screw 12 arranged inside the clamping ring 11, a dynamic ring seat 9 arranged outside the shaft sleeve 2, a transmission set screw 10 arranged inside the dynamic ring seat 9, a cartridge piece 13 arranged outside the dynamic ring seat 9, a cartridge piece screw 14 arranged inside the cartridge piece 13, a cartridge piece screw 14 arranged inside the dynamic ring seat 9, a dynamic ring seat O-ring 15 arranged inside the dynamic ring seat 9, a dynamic ring O-ring 16 arranged outside the dynamic ring seat 9, a seal box 6 arranged outside the shaft sleeve 2, a shaft seal pressing plate 1 arranged outside the seal box 6, a device connection bolt 7 arranged inside the shaft seal pressing plate 1, a device connection bolt 7 arranged inside the seal box 6, a dynamic ring snap ring 3 arranged outside the shaft sleeve 2, a static ring 4 arranged inside the seal box 6, and a push ring 5 arranged inside the static ring 4.

[0020] The shaft sleeve O-ring 22 is located in the seal groove of the shaft sleeve 2 and forms a seal in contact with the shaft surface. The clamping ring 11 can enhance the safety and stability of the device. The clamping ring screw 12 is used to fix the clamping ring 11. The dynamic ring seat 9 is used to install the dynamic ring 8. The dynamic ring seat O-ring 15 seals the contact gap. The cartridge piece screw 14 is used to install the cartridge piece 13. The dynamic ring O-ring 16 is used to seal the contact gap of the dynamic ring 8. The shaft seal pressing plate 1 plays a key sealing role. The device connection bolt 7 is used to install the seal box 6 and the shaft seal pressing plate 1. The dynamic ring snap ring 3 is a device that realizes sealing on the rotating shaft. The static ring 4 cooperates with the dynamic ring 8, effectively preventing the leakage of liquid or gas, ensuring the safe operation and long-term reliability of the device. The shaft sleeve 2 of the mechanical seal device and the seal box 6 are machined with a pumping spiral, which effectively lubricates and cools the inner and outer seal end faces.

[0021] Referring to Figure 1 and Figure 2, an O-ring 17 of the stationary ring is provided inside the sealed box 6, a spring 18 is provided inside the sealed box 6, a connecting bolt 19 is provided inside the sealed box 6, the connecting bolt 19 is arranged inside the shaft seal pressing plate 1, a rotary shaft seal 21 is provided inside the shaft seal pressing plate 1, a high-temperature graphite gasket 20 is provided outside the shaft seal pressing plate 1, a high-temperature graphite gasket 20 is provided inside the sealed box 6, a dynamic ring 8 is provided outside the dynamic ring seat 9, and an O-ring 16 of the dynamic ring is provided inside the dynamic ring 8.

[0022] The O-ring 17 of the stationary ring is used to seal the connection gap of the stationary ring 4. The spring 18 is used to maintain pressure balance, keep the sealing surfaces in contact, adapt to temperature changes, and adjust the preload to ensure that the sealing system can operate effectively in high-temperature and high-pressure environments. The connecting bolt 19 is used to install the sealed box 6 and the shaft seal pressing plate 1. The rotary shaft seal 21 is used to prevent liquid or lubricating oil from leaking around the rotating shaft and prevent dust and impurities from entering the interior of the equipment. The high-temperature graphite gasket 20 has high-temperature stability, corrosion resistance, and reliable sealing performance. The O-ring 16 of the dynamic ring is used to seal the connection gap of the dynamic ring 8. A pre-seal is provided outside the dynamic ring 8 of the mechanical seal device to effectively isolate the high-temperature melt from the inner seal and prevent the medium from entering the sealing end face.

[0023] Working principle: When using this device, when the mechanical seal device is running, the lubricating and cooling medium enters the inner seal of the seal device from the LBI port, lubricates and cools the inner seal end face, and then the lubricating and cooling medium is pumped to the outer seal through the cooperation of the shaft sleeve 2 and the sealed box 6 with a pumping spiral to lubricate and cool the outer seal end face, and then is discharged from the LBO port of the seal device to perform forced circulation on the seal device, increasing the lubrication and cooling effect of the sealing end face. The pre-seal is effectively isolated from the sealed medium outside the inner seal by the rotary shaft seal 21. The dynamic ring 8 is provided with a hydrodynamic groove on its end face to lubricate and cool the sealing end face, avoiding the vaporization of the fluid film on the end face under high-temperature conditions, preventing dry friction, and being protected from the influence of the high temperature of the medium, improving the service life of the mechanical seal device, and thus ensuring the safe and stable operation of the melt pump.

[0024] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A mechanical seal device for a high-temperature melt pump, comprising a shaft sleeve (2), characterized in that: An O-ring (22) of the bushing is arranged inside the bushing (2), a clamping ring (11) is arranged outside the bushing (2), a clamping ring screw (12) is arranged inside the clamping ring (11), a moving ring seat (9) is arranged outside the bushing (2), a transmission setscrew (10) is arranged inside the moving ring seat (9), a collecting piece (13) is arranged outside the moving ring seat (9), a collecting piece screw (14) is arranged inside the collecting piece (13), a collecting piece screw (14) is arranged inside the moving ring seat (9), an O-ring (15) of the moving ring seat is arranged inside the moving ring seat (9), and an O-ring (16) of the moving ring is arranged outside the moving ring seat (9).

2. The mechanical seal device for a high-temperature melt pump according to claim 1, characterized in that: A sealing box (6) is arranged outside the bushing (2), a shaft seal pressing plate (1) is arranged outside the sealing box (6), a device connecting bolt (7) is arranged inside the shaft seal pressing plate (1), a device connecting bolt (7) is arranged inside the sealing box (6), a moving ring snap ring (3) is arranged outside the bushing (2), a stationary ring (4) is arranged inside the sealing box (6), and a pushing ring (5) is arranged inside the stationary ring (4).

3. A mechanical seal device for a high-temperature melt pump according to claim 2, characterized in that: A stationary ring O-ring (17) is arranged inside the sealing box (6), a spring (18) is arranged inside the sealing box (6), a connecting bolt (19) is arranged inside the sealing box (6), the connecting bolt (19) is arranged inside the shaft seal pressing plate (1), a rotary shaft seal (21) is arranged inside the shaft seal pressing plate (1), a high-temperature graphite gasket (20) is arranged outside the shaft seal pressing plate (1), and a high-temperature graphite gasket (20) is arranged inside the sealing box (6).

4. A mechanical seal device for a high-temperature melt pump according to claim 1, characterized in that: A moving ring (8) is arranged outside the moving ring seat (9), and an O-ring (16) of the moving ring is arranged inside the moving ring (8).

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