Discharging mechanical seal structure and dynamic discharging sand mill

Abstract

The utility model discloses a discharging mechanical seal structure and a dynamic discharging sand mill, and the discharging mechanical seal structure comprises a discharging shaft, a sealing ring, a sealing ring, a sealing ring and a sealing ring, and the outer side of one end part of the discharging shaft is connected with a connecting bearing; the mechanical sealing assembly is provided with a movable ring and a static ring which can rotate relatively, the movable ring is connected to the outer side of the end, provided with the connecting bearing, of the discharging shaft, and the static ring and an outer ring of the connecting bearing are oppositely and fixedly arranged. The working stability of the discharging shaft at the discharging end can be effectively improved, the problem of shaking caused by clearance generated by traditional threaded connection can be avoided through double-end-face mechanical sealing formed by the static ring and the movable ring of the mechanical sealing assembly, and therefore the installation precision between the discharging shaft and equipment is improved, and the service life of the discharging shaft is prolonged. The concentricity of the mechanical sealing assembly and the discharging shaft is better controlled, the situation of eccentric friction of the friction ring caused by eccentric rotation is reduced, and the leakage risk is reduced.

Description

Technical Field

[0001] The utility model relates to a sealing structure, in particular to a discharging machine sealing structure and a dynamic discharging sand mill. Background Art

[0002] Sand mills, also known as bead mills, are mainly used for wet grinding of chemical liquid products. They can be roughly divided into horizontal sand mills, basket sand mills, vertical sand mills, etc. according to their performance. Horizontal sand mills are further divided into static discharge and dynamic discharge. Current horizontal sand mills with dynamic discharge generally use a rotary joint at the end of the discharge shaft for sealing and discharge. However, when using threaded connection transmission, the threaded mating position is prone to wear, resulting in substandard concentricity between the rotary joint and the discharge shaft. In addition, there are no other parts to fix the sand mill discharge shaft and the rotary joint except for the threaded connection. The connecting threads cannot be completely tight and there must be clearance. When the discharge shaft rotates at high speed and drives the rotary joint sleeve to rotate, the existence of clearance leads to insufficient stability of the equipment discharge end and severe shaking problems. Therefore, there is an urgent need for a connection structure with higher discharge position stability. Utility Model Content

[0003] The purpose of the utility model is to provide a discharge machine sealing structure and a dynamic discharge sand mill to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.

[0004] The solution of the utility model to solve its technical problems is:

[0005] A discharge machine seal structure includes: a discharge shaft, one end of which is connected to a connecting bearing on the outside; a mechanical seal assembly, which has a dynamic ring and a static ring that can rotate relative to each other, the dynamic ring is connected to the outside of the end of the discharge shaft where the connecting bearing is provided, and the static ring and the outer ring of the connecting bearing are relatively fixed.

[0006] This technical solution has at least the following beneficial effects: the mechanical seal assembly has a dynamic ring and a static ring, and a pair of sealing end faces are formed by the end faces of the dynamic ring and the static ring facing each other, and a dynamic seal is formed between the two. When in use, the discharge shaft is connected to an external device, and the device will drive the discharge shaft to rotate, and the dynamic ring is connected and fixed to the outer side of the end of the discharge shaft, and the static ring is relatively fixed to another external device. At this time, the discharge shaft can transport materials from one device to another. Since there is a connecting bearing limit at the connection position of the end of the discharge shaft, the working stability of the discharge shaft at the discharge end position can be effectively improved, and the double-end mechanical seal formed by the static ring and the dynamic ring of the mechanical seal assembly can avoid the problem of jitter caused by the clearance generated by the traditional threaded connection, thereby improving the installation accuracy between the discharge shaft and the equipment, and making it easier to control the concentricity of the mechanical seal assembly and the discharge shaft, which is conducive to reducing the eccentric friction of the friction ring caused by eccentric rotation and reducing the risk of leakage.

[0007] As a further improvement to the above technical solution, an annular step is provided on the outer side of the end of the discharge shaft, and one end of the inner ring of the connecting bearing abuts against the annular step. An annular step is formed on the outer side of the discharge shaft for positioning the connecting bearing. When installing the connecting bearing, the inner ring of the connecting bearing is inserted into the outer side of the discharge shaft end and abuts against the annular step, which allows for quick installation and positioning of the connecting bearing and improves the convenience of installing the connecting bearing.

[0008] As a further improvement to the above technical solution, an elastic circlip is secured to the outer side of the inner portion of the discharge shaft, abutting against the other end of the inner ring of the connecting bearing. After the connecting bearing is installed, the elastic circlip is secured to the outer side of the discharge shaft. The elastic circlip and the annular step now limit the ends of the inner ring of the connecting bearing, effectively preventing axial displacement of the connecting bearing along the discharge shaft and improving the stability of the connecting bearing installation.

[0009] As a further improvement to the above technical solution, the present invention further includes a connecting seat and a gland. The connecting seat and gland are interconnected to form an annular clamping space. The outer ring of the connecting bearing is located within the clamping space, and the dynamic ring is connected to the gland. When the connecting seat and gland are connected, the ends of the outer ring of the connecting bearing can be clamped, and then the dynamic ring is connected to the gland. This effectively improves the relative stability between the connecting bearing and the dynamic ring.

[0010] As a further improvement to the above technical solution, the connecting seat is provided with an annular first-level step at one end near the gland, an annular second-level step is provided at the bottom side of the first-level step, and the gland is formed with an annular protrusion at a position opposite to the first-level step, the annular protrusion abuts against the inside of the first-level step, and the clamping space is formed between the annular protrusion and the second-level step. The first-level step on the inner side of the connecting seat can limit one end of the outer ring of the connecting bearing, and the one end of the outer ring of the connecting bearing can be quickly installed and positioned in the first-level step, while the annular protrusion on the gland can also be quickly docked and positioned with the connecting seat by quickly cooperating with the second-level step. At this time, the gland and the first-level step form a clamping space, which can clamp and fix the two ends of the outer ring of the connecting bearing. This can greatly improve the overall assembly efficiency, and the connection structure is more compact, which is conducive to controlling the concentricity of the mechanical seal assembly and the discharge shaft, and reducing assembly errors.

[0011] As a further improvement to the above technical solution, the stationary ring radially protrudes from the mechanical seal assembly. A positioning step is formed between the side of the stationary ring closest to the gland and the mechanical seal assembly, with one end of the gland resting within the positioning step. When connecting the gland and stationary ring, the gland can be sleeved over the outside of the mechanical seal assembly and resting within the positioning step. This allows for quick connection and alignment between the two, resulting in a more compact connection structure, facilitates controlling the concentricity of the mechanical seal assembly and the discharge shaft, and reduces assembly errors.

[0012] As a further improvement to the above technical solution, a first connector is provided on the stationary ring, which is connected to the gland. The stationary ring and the gland are locked and fixed by the first connector, thereby improving the tightness of the connection between the two and effectively preventing relative rotation between the gland and the stationary ring.

[0013] As a further improvement to the above technical solution, the mechanical seal assembly includes an inner sleeve interconnected with the rotating ring. A plurality of second connectors are spaced around the outer periphery of the inner sleeve, and the plurality of second connectors are connected to the discharge shaft. The second connectors are evenly arranged around the circumference of the inner sleeve connected to the rotating ring, ensuring more uniform force on the inner sleeve. When the discharge shaft rotates at high speeds, the mechanical seal assembly is evenly stressed, reducing vibration, improving the stability of the entire discharge seal structure, and helping to prevent vibration at the end of the discharge shaft.

[0014] As a further improvement to the above technical solution, the connecting bearing is a deep groove ball bearing. The deep groove ball bearing can withstand a large radial load, so that the radial runout of the mechanical seal structure is effectively controlled, thereby making the entire discharge machine seal structure more stable.

[0015] A dynamic discharging sand mill comprises the above-mentioned discharging machine sealing structure.

[0016] This technical solution has at least the following beneficial effects: the dynamic discharging sand mill utilizes a discharging shaft for dynamic discharging, and the discharging end of the discharging shaft is connected to an external device. Due to the adoption of the above-mentioned discharging machine seal structure, the working stability of the discharging shaft at the discharging end position can be effectively improved, and the double-end mechanical seal formed by the static ring and the dynamic ring of the mechanical seal assembly can avoid the problem of jitter caused by the clearance generated by the traditional threaded connection, thereby improving the installation accuracy between the discharging shaft and the equipment, making it easier to control the concentricity of the mechanical seal assembly and the discharging shaft, which is conducive to reducing the eccentric friction of the friction ring caused by eccentric rotation and reducing the risk of leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief description of the drawings required for describing the embodiments. Obviously, the drawings described are only part of the embodiments of the present invention, not all of them. Those skilled in the art can also derive other design solutions and drawings based on these drawings without inventive effort.

[0018] Figure 1 This is a three-dimensional diagram of the sealing structure of the discharge machine of the utility model

[0019] Figure 2 It is a schematic diagram of the axial cross-sectional structure of the discharge machine seal along the discharge shaft of the utility model.

[0020] Figure 3 yes Figure 2 A is a partial enlarged schematic diagram of .

[0021] In the accompanying drawings: 1-discharging shaft, 11-connecting bearing, 12-annular step, 13-elastic retaining ring, 2-mechanical seal assembly, 21-static ring, 22-positioning step, 3-connecting seat, 31-first step, 32-second step, 4-pressure cover, 41-annular protrusion. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the concept, specific structure and technical effects of the present invention in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention. In addition, all the connection relationships mentioned in the text do not refer to the direct connection of components, but refer to the fact that a better connection structure can be formed by adding or reducing connecting accessories according to the specific implementation situation. The various technical features in the invention can be combined interactively without conflicting with each other.

[0023] Reference Figure 1 A discharge machine seal structure includes: a discharge shaft 1, one end of which is connected to a connecting bearing 11 on the outside; a mechanical seal assembly 2, which has a dynamic ring and a static ring 21 that can rotate relative to each other, the dynamic ring is connected to the outer side of the end of the discharge shaft 1 where the connecting bearing 11 is provided, and the static ring 21 and the outer ring of the connecting bearing 11 are relatively fixed.

[0024] In this discharging machine sealing mechanism, the mechanical seal assembly 2 has a dynamic ring and a static ring 21. The end faces of the dynamic ring and the static ring 21 facing each other form a pair of sealing end faces, and a dynamic seal is formed between the two. When in use, the discharging shaft 1 is connected to an external device, which will drive the discharging shaft 1 to rotate, and the dynamic ring is connected and fixed to the outer side of the end of the discharging shaft 1, and the static ring 21 is relatively fixed to another external device. At this time, the discharging shaft 1 can transport materials from one device to another. Since there is a connecting bearing 11 limit at the connection position of the end of the discharging shaft 1, the working stability of the discharging shaft 1 at the discharging end position can be effectively improved. The double-end mechanical seal formed by the static ring 21 and the dynamic ring of the mechanical seal assembly 2 can avoid the problem of jitter caused by the clearance generated by the traditional threaded connection, thereby improving the installation accuracy between the discharging shaft 1 and the equipment, making the concentricity of the mechanical seal assembly 2 and the discharging shaft 1 better controlled, which is conducive to reducing the eccentric friction of the friction ring caused by eccentric rotation, and reducing the risk of leakage.

[0025] In order to facilitate the positioning of the connecting bearing 11 on the outside of the discharge shaft 1, in this embodiment, an annular step 12 is provided on the outside of the end of the discharge shaft 1, and one end of the inner ring of the connecting bearing 11 abuts against the annular step 12. The annular step 12 for positioning the connecting bearing 11 is formed on the outside of the discharge shaft 1. When installing the connecting bearing 11, the inner ring of the connecting bearing 11 is inserted into the outside of the end of the discharge shaft 1 and abuts against the annular step 12, which can achieve rapid installation and positioning of the connecting bearing 11 and improve the convenience of installing the connecting bearing 11.

[0026] The inner ring of the connecting bearing 11 and the outer side of the discharge shaft 1 are interferingly fitted to achieve the positioning of the connecting bearing 11. In order to further improve the stability of the installation of the connecting bearing 11, in this embodiment, an elastic circlip 13 is clamped to the outer side of the inner ring of the discharge shaft 1, and the elastic circlip 13 abuts against the other end of the inner ring of the connecting bearing 11. After the connecting bearing 11 is installed in place, the elastic circlip 13 is clamped to the outer side of the discharge shaft 1. At this time, the elastic circlip 13 and the annular step 12 can be used to limit the two ends of the inner ring of the connecting bearing 11, effectively preventing the connecting bearing 11 from axially displacing along the discharge shaft 1, thereby improving the stability of the installation of the connecting bearing 11.

[0027] In the above embodiment, the stationary ring 21 can be directly fixed and connected to the outer ring of the connecting bearing 11. However, due to the limited size of the outer ring of the connecting bearing 11, in order to improve the structural stability of the mutual fixation therewith, in this embodiment, the utility model further includes a connecting seat 3 and a gland 4. The connecting seat 3 and the gland 4 are interconnected and form an annular clamping space. The outer ring of the connecting bearing 11 is located in the clamping space, and the dynamic ring is connected to the gland 4. When the connecting seat 3 and the gland 4 are interconnected, the two ends of the outer ring of the connecting bearing 11 can be clamped, and then the dynamic ring is connected to the gland 4. This effectively improves the relative fixation stability between the connecting bearing 11 and the dynamic ring.

[0028] In order to better ensure the coaxiality of the connection between the connecting seat 3 and the pressure cover 4, in this embodiment, the connecting seat 3 is provided with an annular first-level step 31 at one end close to the pressure cover 4, and an annular second-level step 32 is provided on the bottom side of the first-level step 31. The pressure cover 4 is formed with an annular protrusion 41 at a position opposite to the first-level step 31. The annular protrusion 41 is abutted against the first-level step 31, and the clamping space is formed between the annular protrusion 41 and the second-level step 32. The first-level step 31 on the inner side of the connecting seat 3 can limit one end of the outer ring of the connecting bearing 11, and one end of the outer ring of the connecting bearing 11 can be quickly installed and positioned in the first-level step 31. The annular protrusion 41 on the pressure cover 4 can also be quickly docked and positioned with the connecting seat 3 through quick cooperation with the second-level step 32. At this time, the pressure cover 4 and the first-level step 31 form a clamping space, which can clamp and fix the two ends of the outer ring of the connecting bearing 11. This can greatly improve the overall assembly efficiency, and the connection structure is more compact, which is conducive to controlling the concentricity of the mechanical seal assembly 2 and the discharge shaft 1, and reducing assembly errors.

[0029] Similarly, to improve the coaxiality of the connection between the gland 4 and the mechanical seal assembly 2, in this embodiment, the stationary ring 21 radially protrudes from the mechanical seal assembly 2. A positioning step 22 is formed between the side of the stationary ring 21 closest to the gland 4 and the mechanical seal assembly 2, and one end of the gland 4 abuts against the positioning step 22. When connecting the gland 4 and the stationary ring 21, the gland 4 can be sleeved onto the outside of the mechanical seal assembly 2 and abut against the positioning step 22. This allows for quick connection and alignment between the two, and makes the connection structure more compact, which is beneficial for controlling the concentricity of the mechanical seal assembly 2 and the discharge shaft 1 and reducing assembly errors.

[0030] To securely connect the stationary ring 21 to the gland 4, in this embodiment, a first connector is provided on the stationary ring 21. The first connector can be a screw, bolt, or other fastener. The first connector secures the stationary ring 21 to the gland 4, enhancing the tightness of the connection and effectively preventing relative rotation between the gland 4 and the stationary ring 21.

[0031] In order to make the dynamic ring and the discharge shaft 1 rotate more synchronously, in this embodiment, the mechanical seal assembly 2 includes an inner sleeve interconnected with the dynamic ring, and a plurality of second connecting members are arranged around the outer side of the inner sleeve at intervals. The plurality of second connecting members are connected to the discharge shaft 1. Similarly, the second connecting members can be connecting members such as screws, bolts or screws. The second connecting members are evenly arranged on the circumference of the inner sleeve connected to the dynamic ring, so that the inner sleeve is more evenly stressed. When the discharge shaft 1 rotates at high speed, the mechanical seal assembly 2 is evenly stressed, reducing shaking, improving the stability of the entire discharge machine seal structure, and helping to avoid the problem of shaking at the end of the discharge shaft 1.

[0032] In some embodiments, the connecting bearing 11 is a deep groove ball bearing. The deep groove ball bearing can withstand a large radial load, so that the radial runout of the mechanical seal structure is effectively controlled, thereby making the entire discharge machine seal structure more stable.

[0033] A dynamic discharging sand mill comprises the above-mentioned discharging machine sealing structure.

[0034] The dynamic discharging sand mill utilizes the discharging shaft 1 for dynamic discharging, and the discharging end of the discharging shaft 1 is connected to the peripheral equipment. Due to the adoption of the above-mentioned discharging machine seal structure, the working stability of the discharging shaft 1 at the discharging end position can be effectively improved, and the double-end mechanical seal formed by the static ring 21 and the dynamic ring of the mechanical seal assembly 2 can avoid the problem of jitter caused by the clearance generated by the traditional threaded connection, thereby improving the installation accuracy between the discharging shaft 1 and the equipment, making it easier to control the concentricity of the mechanical seal assembly 2 and the discharging shaft 1, which is conducive to reducing the eccentric friction of the friction ring caused by eccentric rotation and reducing the risk of leakage.

[0035] The above specifically describes the preferred embodiments of the present invention, but the invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A discharge machine sealing structure, characterized in that: include: A discharge shaft (1), one end of which is connected to the outer side of a connecting bearing (11); A mechanical seal assembly (2) comprises a moving ring and a stationary ring (21) which are rotatable relative to each other, wherein the moving ring is connected to the outer side of the end of the discharge shaft (1) provided with the connecting bearing (11), and the stationary ring (21) and the outer ring of the connecting bearing (11) are fixed relative to each other.

2. A discharge machine sealing structure according to claim 1, characterized in that: An annular step (12) is provided on the outer side of the end of the discharge shaft (1), and one end of the inner ring of the connecting bearing (11) abuts against the annular step (12).

3. A discharge machine sealing structure according to claim 2, characterized in that: The inner and outer sides of the discharge shaft (1) are clamped with an elastic retaining ring (13), and the elastic retaining ring (13) abuts against the other end of the inner ring of the connecting bearing (11).

4. The discharge machine sealing structure according to claim 1, characterized in that: It also includes a connecting seat (3) and a pressure cover (4), wherein the connecting seat (3) and the pressure cover (4) are connected to each other and form an annular clamping space, the outer ring of the connecting bearing (11) is located in the clamping space, and the dynamic ring is connected to the pressure cover (4).

5. A discharge machine sealing structure according to claim 4, characterized in that: An annular first step (31) is provided at one end of the connecting seat (3) close to the pressure cover (4), an annular second step (32) is provided on the bottom side of the first step (31), and an annular protrusion (41) is formed at a position of the pressure cover (4) facing the first step (31), the annular protrusion (41) is abutted against the first step (31), and the clamping space is formed between the annular protrusion (41) and the second step (32).

6. A discharge machine sealing structure according to claim 4, characterized in that: The stationary ring (21) protrudes radially from the mechanical seal assembly (2), and a positioning step (22) is formed between the side of the stationary ring (21) close to the gland (4) and the mechanical seal assembly (2), and one end of the gland (4) abuts against the positioning step (22).

7. A discharge machine sealing structure according to claim 6, characterized in that: A first connecting piece is provided on the stationary ring (21), and the first connecting piece is connected to the gland (4).

8. The discharge machine sealing structure according to claim 1, characterized in that: The mechanical seal assembly (2) comprises an inner sleeve interconnected with the dynamic ring, a plurality of second connecting members are arranged around the outer side of the inner sleeve at intervals, and the plurality of second connecting members are connected to the discharge shaft (1).

9. The discharge machine sealing structure according to claim 1, characterized in that: The connecting bearing (11) is a deep groove ball bearing.

10. A dynamic discharging sand mill, characterized by: The invention comprises a discharge machine sealing structure as claimed in any one of claims 1 to 9.

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