Mechanical seal for stirring equipment

Abstract

The utility model relates to a mechanical seal for stirring equipment, which comprises a mounting seat, a stirring shaft, a shaft sleeve, a bearing, an upper static ring, an upper moving ring, a lower moving ring, a lower static ring, a sealing flange, a spring seat positioned between the upper moving ring and the lower moving ring, and a compensation spring positioned in the spring seat, the positioning insertion block and the installation bolt are located in the installation sleeve, the positioning insertion block is sleeved with the bearing, the installation sleeve is located in the circumferential direction of the installation base, the bottom of the installation sleeve abuts against the installation base, a supporting frame is fixedly installed in the installation sleeve, and the positioning insertion block comprises a positioning section at the upper end. And the positioning section is positioned above the limiting seat and is fixedly connected with the support frame through a mounting bolt. By the adoption of the scheme, the mechanical seal for the stirring equipment enables the bearing to be stably located in the installation sleeve so that the equipment can stably operate in the working state.

Description

Technical Field

[0001] The utility model relates to stirring equipment, in particular to a mechanical seal used for stirring equipment. Background Art

[0002] The mechanical seal of a mixing equipment refers to a precision sealing device installed between the agitator shaft and the equipment casing of a mixing equipment (such as a mixing kettle, a mixing tank, a mixer, etc.) to prevent material leakage during the mixing process and external impurities from entering the equipment. Its main function is to ensure that when the agitator shaft rotates at high speed, the gap between the agitator shaft and the equipment casing can be effectively sealed to maintain a sealed environment inside the equipment.

[0003] The agitator shaft is usually installed with the motor through key connection, coupling, etc., so that the motor is started to drive the agitator shaft to rotate at high speed to stir the material in the shell equipment. However, during the high-speed rotation of the agitator shaft, if there are no sufficient support and isolation measures, large vibration and noise may be generated. In addition, the axial movement and radial shaking caused by the vibration during the stirring process will affect the operating stability of the equipment. Summary of the invention

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a mechanical seal for a stirring device, which can stably position a bearing in a mounting sleeve so that the device can operate stably in a working state.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: including a mounting seat, a stirring shaft, a sleeve, a bearing, an upper static ring, an upper dynamic ring, a lower dynamic ring, a lower static ring, a sealing flange, a spring seat located between the upper dynamic ring and the lower dynamic ring, and a compensation spring located in the spring seat. The length direction of the stirring shaft extends up and down and is circumferentially sleeved with a sleeve, the sleeve is rotatably mounted on the mounting seat through a bearing, the upper static ring and the lower static ring are respectively fixedly mounted on the sealing flange and the mounting seat, the upper dynamic ring and the lower dynamic ring are both fixedly mounted on the sleeve, the other end of the upper dynamic ring contacts the upper static ring, and the other end of the lower dynamic ring contacts the lower static ring, and also includes a mounting sleeve, a positioning plug located in the mounting sleeve and a mounting bolt, the positioning plug is sleeved with a bearing, the mounting sleeve is located in the circumference of the mounting seat and the bottom is against the mounting seat, a support frame is fixedly installed in the mounting sleeve, the positioning plug includes a positioning section at the upper end, the positioning section is located above the limit seat and is fixedly connected to the support frame through a mounting bolt.

[0006] The utility model is further configured as follows: it also includes a matching sleeve, the matching sleeve includes a matching section and a supporting portion for the bearing sleeve, the diameter of the supporting portion is larger than the diameter of the matching section, the bottom of the bearing is against the supporting portion, the positioning block also includes a connecting section that is circumferentially against the bearing and a limiting section located below the connecting section, and the limiting section is against the bottom of the bearing.

[0007] The utility model is further configured as follows: it also includes a lower oil seal located in the installation sleeve, the positioning plug block also includes a mounting section located below the limiting section, the diameter of the limiting section is larger than the diameter of the mounting section, the inner periphery of the lower oil seal is sleeved on the matching sleeve, the outer periphery of the lower oil seal contacts with the inner periphery of the mounting section, and the limiting section is located above the lower oil seal and abuts against the lower oil seal.

[0008] The utility model is further configured to include a supporting member, wherein the mounting bolt is inserted into the supporting member and the positioning section and is fixedly connected to the support frame, and the inner side of the supporting member is in contact with the upper end surface of the bearing.

[0009] The utility model is further configured as follows: it also includes an upper oil seal located in the installation sleeve, the inner periphery of the upper oil seal is sleeved on the matching sleeve, and the outer periphery of the upper oil seal abuts against the abutting piece.

[0010] The utility model is further configured as follows: it also includes a first sealing ring, a second sealing ring, a third sealing ring and a fourth sealing ring, the first sealing ring is located between the circumference of the upper static ring and the mounting seat, the second sealing ring is located between the upper dynamic ring and the shaft sleeve, the third sealing ring is located between the lower static ring and the sealing flange, and the fourth sealing ring is located between the lower dynamic ring and the shaft sleeve.

[0011] The utility model is further configured as follows: the sealing flange is located at the bottom of the mounting seat, and a plurality of fifth sealing rings are arranged between the sealing flange and the mounting seat.

[0012] By adopting the above technical solutions, 1. Compact structure and integration: By integrating the key components such as the stirring shaft, sleeve, bearing, static ring, dynamic ring, spring seat, compensation spring, mounting seat, mounting sleeve, positioning plug, support frame, etc., a compact structure is formed, which simplifies the equipment layout and facilitates the installation and maintenance of the stirring equipment in a limited space; 2. The mounting sleeve can form a chamber to effectively prevent the leakage of process media at the stirring shaft and bearing, ensure the stability of the internal pressure, temperature and other working conditions of the equipment, and improve the sealing effect; 3. The stirring shaft and bearing are firmly fixed in the mounting sleeve, which can provide better axial and radial support, and effectively protect the bearing to prevent the bearing from being damaged due to axial movement, reduce the axial movement and radial shaking caused by vibration during the stirring process, and improve the stability and reliability of the equipment operation; 4. Through the protection of the mounting sleeve, the stirring shaft and bearing are reduced from the influence of the external environment (such as dust, moisture, corrosive gas, etc.), reduce the risk of bearing wear and corrosion, and extend the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be 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 paying creative work.

[0014] Figure 1 It is a cross-sectional view of a specific implementation mode of the utility model;

[0015] Figure 2 It is a partial enlarged view of a specific embodiment of the utility model;

[0016] Figure 3 for Figure 2 A magnified view of middle;

[0017] Figure 4 for Figure 2 Enlarged view of middle B;

[0018] Figure 5 for Figure 2 Enlarged view of C in the middle.

[0019] In the figure: 1-mounting seat, 11-upper static ring, 12-upper dynamic ring, 13-lower dynamic ring, 14-spring seat, 15-compensation spring, 16-coolant inlet;

[0020] 2- stirring shaft, 21- bearing, 22- shaft sleeve, 23- matching sleeve, 231- matching section, 232- supporting portion;

[0021] 3-installation sleeve, 31-positioning plug, 311-positioning section, 312-connecting section, 313-limiting section, 314-installation section, 32-installation bolt, 33-support frame, 34-lower oil seal, 35-upper oil seal;

[0022] 4-supporting member, 5-first sealing ring, 6-second sealing ring, 7-third sealing ring, 8-fourth sealing ring, 9-sealing flange, 91-lower static ring, 10-fifth sealing ring. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] like Figure 1-Figure 5As shown, the utility model discloses a mechanical seal for a stirring device, comprising a mounting seat 1, a stirring shaft 2, a sleeve 22, a bearing 21, an upper stationary ring 11, an upper moving ring 12, a lower moving ring 13, a lower stationary ring 91, a sealing flange 9, a spring seat 14 located between the upper moving ring 12 and the lower moving ring 13, and a compensation spring 15 located in the spring seat 14. The stirring shaft 2 extends in the vertical direction and is provided with a sleeve 22 in the circumferential sleeve. The sleeve 22 is fixed to the stirring shaft 2 by bolts. The sleeve 22 is rotatably mounted on the mounting seat 1 by the bearing 21. The upper stationary ring 11 and the lower stationary ring 91 are respectively fixed It is fixedly installed on the sealing flange 9 and the mounting seat 1, and the upper moving ring 12 and the lower moving ring 13 are both fixedly installed on the sleeve 22. The other end of the upper moving ring 12 contacts the upper static ring 11, and the other end of the lower moving ring 13 contacts the lower static ring 91. The upper side of the mounting seat 1 is the power input side, and the lower side of the mounting seat 1 is used as the hydraulic test. After the sleeve 22 is installed on the stirring shaft 2, the upper side of the stirring shaft 2 is fixed to the motor output shaft through a coupling (that is, connected to a power source such as a motor), and the lower end of the stirring shaft 2 can be connected to an output structure such as an impeller. When the motor is started to drive the stirring shaft 2 to rotate, at this time, The upper moving ring 12 and the lower moving ring 13 are both fixedly mounted on the shaft sleeve 22, and the compensation spring 15 is compressed and arranged between the upper moving ring 12 and the lower moving ring 13, so that during the high-speed rotation of the stirring shaft 2, the upper moving ring 12 and the upper static ring 11 are in close contact, and the lower moving ring 13 and the lower static ring 91 are in close contact through the pre-tightening force of the compensation spring 15, thereby forming an effective sealing barrier to prevent the stirring material from leaking from the gap between the stirring shaft 2 and the equipment housing. The invention also includes a mounting sleeve 3, a positioning plug 31 and a mounting bolt 32 located in the mounting sleeve 3, wherein the positioning plug 31 is sleeved with the bearing 21, and the mounting sleeve The barrel 3 is located in the circumference of the mounting seat 1 and the bottom is against the mounting seat 1. A support frame 33 is fixedly installed in the mounting sleeve 3. The positioning plug 31 includes a positioning section 311 at the upper end. The positioning section 311 is located above the limit seat and is fixedly connected to the support frame 33 through the mounting bolt 32. After the positioning section 311 is fixedly connected to the support frame 33, the bearing 21 is stably located in the positioning plug 31, so that when the motor is started to drive the stirring shaft 2 and the bearing 21 to rotate, the bearing 21 can be stably located in the positioning plug 31, indirectly allowing the stirring shaft 2 to stably rotate in the mounting sleeve 3. 1. Compact structure and integration: By integrating the key components such as the stirring shaft 2, the sleeve 22, the bearing 21, the static ring, the dynamic ring, the spring seat 14, the compensation spring 15, the mounting seat 1, the mounting sleeve 3, the positioning plug 31, and the support frame 33, a compact structure is formed, which simplifies the equipment layout and facilitates the installation and maintenance of the stirring equipment in a limited space; 2. The mounting sleeve 3 can form a chamber extending up and down in the length direction, effectively preventing the leakage of the process medium at the stirring shaft 2 and the bearing 21, ensuring the stability of the working conditions such as pressure and temperature inside the equipment, and improving the sealing effect; 3.Fixing the agitator shaft 2 and the bearing 21 firmly in the installation sleeve 3 can provide better axial and radial support, and effectively protect the bearing 21, prevent the bearing 21 from being damaged due to axial movement, reduce the axial movement and radial shaking caused by vibration during the mixing process, and improve the stability and reliability of the equipment operation; 4. Through the protection of the installation sleeve 3, the agitator shaft 2 and the bearing 21 are not easily affected by the external environment (such as dust, moisture, corrosive gas, etc.), reduce the risk of wear and corrosion of the bearing 21, and extend the service life of the equipment. .

[0025] It is worth noting that the mounting seat 1 is also provided with a coolant inlet 16. The introduction of cooling water or flushing liquid can take away the heat generated by friction, reduce the sealing surface temperature, prevent the sealing material from failing due to overheating, and further ensure the stability and durability of the sealing performance.

[0026] Among them, it also includes a matching sleeve 23, the matching sleeve 23 includes a matching section 231 and a supporting portion 232 for the bearing 21 to be sleeved, the diameter of the supporting portion 232 is larger than the diameter of the matching section 231, the bottom of the bearing 21 is against the supporting portion 232, the positioning plug 31 also includes a connecting section 312 that is circumferentially against the bearing 21, and a limiting section 313 located below the connecting section 312, the limiting section 313 is against the bottom of the bearing 21, because the bottom of the bearing 21 is against the supporting portion 232 of the stirring shaft 2, so that the bearing 21 can be affected by the supporting portion 232 after being sleeved on the stirring shaft 2, that is, it cannot move downward beyond the supporting portion 232 and is stably sleeved on the matching sleeve 23 to achieve the shaft The position of the bearing 21 on the matching sleeve 23 is determined. At the same time, since the bottom of the bearing 21 will also abut against the limiting section 313 of the positioning plug 31, the bearing 21 is sleeved on the matching section 231, and the abutting portion 232 provides a stable bottom support to prevent the bearing 21 from moving in the axial direction, further improving the axial positioning accuracy of the stirring shaft 2, and the limiting section 313 abuts against the bearing 21 circumferentially, limiting the radial movement of the bearing 21 and enhancing the stability of the bearing 21. At the same time, through the precise matching of the matching sleeve 23, the positioning plug 31 and the bearing 21, the sealing between the stirring shaft 2 and the bearing 21 is ensured to prevent material leakage. It is particularly suitable for stirring equipment that processes high-viscosity, highly corrosive or toxic and harmful materials.

[0027] Among them, it also includes a lower oil seal 34 located in the installation sleeve 3, and the positioning plug block 31 also includes a mounting section 314 located below the limiting section 313. The diameter of the limiting section 313 is larger than the diameter of the mounting section 314. The inner periphery of the lower oil seal 34 is sleeved on the matching sleeve 23, and the outer periphery of the lower oil seal 34 contacts the inner periphery of the mounting section 314. The limiting section 313 is located above the lower oil seal 34 and abuts against the lower oil seal 34. The bottom end of the bearing 21 is protected by the cooperation between the lower oil seal 34 and the mounting section 314. In order to provide dust and leakage protection, the limiting section 313 and the mounting section 314 of the positioning plug 31 are designed so that the bottom of the bearing 21 abuts against the limiting section 313, and at the same time, the lower oil seal 34 contacts the inner circumference of the mounting section 314 to form a circumferential seal on the bottom of the bearing 21, while the inner circumference of the lower oil seal 34 contacts the mounting section 314 and the upper part abuts against the limiting section 313, so that when the hydraulic pressure flows to the lower oil seal 34, the cooperation of the limiting section 313 and the lower oil seal 34 realizes double sealing at this position, preventing external impurities, moisture, etc. from entering the interior of the bearing 21.

[0028] Among them, it also includes a supporting member 4, and the mounting bolt 32 is inserted into the supporting member 4 and the positioning section 311 and fixedly connected to the support frame 33, and the inner side of the supporting member 4 is abutted against the upper end surface of the bearing 21. Since the supporting member 4 is located above the positioning section 311, after the mounting bolt 32 is inserted into the supporting member 4 and the positioning section 311 and fixed to the support frame 33, the supporting member 4 can be pressed on the top of the bearing 21 and the positioning block 31, so that after the assembly is completed and the work starts, the positioning block 31 can be stably located on the support frame 33. At the same time, the bearing 21 cannot move up and down on the matching sleeve 23 to pass over the supporting portion 232, nor can it pass over the supporting member 4 upward, so as to achieve stable positioning of the bearing 21 in the axial direction.

[0029] It also includes an upper oil seal 35 located in the installation sleeve 3, the inner circumference of the upper oil seal 35 is sleeved on the matching sleeve 23, and the outer circumference of the upper oil seal 35 is against the abutment 4. The setting of the upper oil seal 35 enhances the sealing effect between the stirring shaft 2 and the abutment 4, and the top end of the bearing 21 is protected from dust and leakage through the cooperation of the upper oil seal 35, the matching sleeve 23 and the abutment 4; and the inner circumference of the upper oil seal 35 is sleeved on the matching sleeve 23, and the outer circumference is against the abutment 4, and it works together with the lower oil seal 34 to form a circumferential seal for the bearing 21, preventing external impurities, moisture, etc. from entering the interior of the bearing 21.

[0030] Among them, it also includes a first sealing ring 5, a second sealing ring 6, a third sealing ring 7 and a fourth sealing ring 8. The first sealing ring 5 is located between the circumference of the upper static ring 11 and the mounting seat 1, the second sealing ring 6 is located between the upper dynamic ring 12 and the shaft sleeve 22, the third sealing ring 7 is located between the lower static ring 91 and the sealing flange 9, and the fourth sealing ring 8 is located between the lower dynamic ring 13 and the shaft sleeve 22. The arrangement of the first to fourth sealing rings 8 respectively strengthens the sealing effect between the upper static ring 11 and the mounting seat 1, the upper dynamic ring 12 and the shaft sleeve 22, the lower static ring 91 and the sealing flange 9, and the lower dynamic ring 13 and the shaft sleeve 22, and effectively prevents the material from leaking from the gaps between the upper static ring 11 and the mounting seat 1, the upper dynamic ring 12 and the shaft sleeve 22, the lower dynamic ring 13 and the shaft sleeve 22, and the lower static ring 91 and the sealing flange 9 during the mixing process.

[0031] Preferably, the sealing flange 9 is located at the bottom of the mounting seat 1, and a plurality of fifth sealing rings 10 are arranged between the sealing flange 9 and the mounting seat 1. 1. The sealing flange 9 serves as a connector between the mechanical sealing assembly and the equipment housing, and the sealing device is firmly fixed to the corresponding interface of the equipment by fasteners such as bolts and nuts to ensure that the sealing surface is accurately aligned and withstands axial and radial forces to prevent relative displacement between the sealing flange 9 and the equipment during operation; 2. Due to the presence of a plurality of fifth sealing rings 10 between the sealing flange 9 and the mounting seat 1, a sealing barrier is formed between the sealing flange 9 and the mounting seat 1 to prevent the medium between the equipment and the stirring shaft 2 from leaking along the connection between the sealing flange 9, while preventing external impurities, moisture, etc. from entering the sealing cavity.

[0032] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A mechanical seal for a stirring device, comprising a mounting seat, a stirring shaft, a sleeve, a bearing, an upper stationary ring, an upper movable ring, a lower movable ring, a lower stationary ring, a sealing flange, a spring seat located between the upper movable ring and the lower movable ring, and a compensation spring located in the spring seat. The stirring shaft extends in the vertical direction and is provided with a sleeve in the circumferential sleeve. The sleeve is rotatably mounted on the mounting seat through a bearing. The upper stationary ring and the lower stationary ring are fixedly mounted on the sealing flange and the mounting seat respectively. The upper movable ring and the lower movable ring are fixedly mounted on the sleeve. The other end of the upper movable ring contacts the upper stationary ring, and the other end of the lower movable ring contacts the lower stationary ring. It is characterized in that: It also includes a mounting sleeve, a positioning block and mounting bolts located in the mounting sleeve, the positioning block is sleeved with a bearing, the mounting sleeve is located in the circumference of the mounting seat and the bottom is against the mounting seat, a support frame is fixedly installed in the mounting sleeve, the positioning block includes a positioning section at the upper end, the positioning section is located above the limit seat and is fixedly connected to the support frame by mounting bolts.

2. A mechanical seal for a stirring device according to claim 1, characterized in that: It also includes a matching sleeve, which includes a matching section and a supporting portion for the bearing sleeve, the diameter of the supporting portion is larger than the diameter of the matching section, the bottom of the bearing is against the supporting portion, and the positioning block also includes a connecting section that is circumferentially against the bearing and a limiting section located below the connecting section, and the limiting section is against the bottom of the bearing.

3. A mechanical seal for a stirring device according to claim 2, characterized in that: It also includes a lower oil seal located in the installation sleeve, the positioning plug also includes a mounting section located below the limiting section, the diameter of the limiting section is larger than the diameter of the mounting section, the inner periphery of the lower oil seal is sleeved on the matching sleeve, the outer periphery of the lower oil seal contacts the inner periphery of the mounting section, and the limiting section is located above the lower oil seal and abuts against the lower oil seal.

4. A mechanical seal for a stirring device according to claim 2, characterized in that: It also includes a supporting piece, wherein the mounting bolt is inserted into the supporting piece and the positioning section and is fixedly connected to the support frame, and the inner side of the supporting piece is in contact with the upper end surface of the bearing.

5. A mechanical seal for a stirring device according to claim 4, characterized in that: It also includes an upper oil seal located in the installation sleeve, the inner periphery of the upper oil seal is sleeved on the matching sleeve, and the outer periphery of the upper oil seal is abutted against the abutting piece.

6. A mechanical seal for a stirring device according to claim 1, characterized in that: It also includes a first sealing ring, a second sealing ring, a third sealing ring and a fourth sealing ring. The first sealing ring is located between the circumference of the upper static ring and the mounting seat, the second sealing ring is located between the upper dynamic ring and the shaft sleeve, the third sealing ring is located between the lower static ring and the sealing flange, and the fourth sealing ring is located between the lower dynamic ring and the shaft sleeve.

7. A mechanical seal for a stirring device according to claim 1, characterized in that: The sealing flange is located at the bottom of the mounting seat, and a plurality of fifth sealing rings are arranged between the sealing flange and the mounting seat.

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