Sealing module and double-shaft stirrer

Abstract

The invention provides a sealing module and a double-shaft stirrer, and relates to the technical field of stirring equipment. The sealing module comprises an end cover, at least one elastic sealing ring, a rotating shaft, a gland and an adjusting part, the end cover is provided with a shaft hole, the shaft hole penetrates through the end cover, and the shaft hole is a stepped hole. The at least one elastic sealing ring is arranged in the shaft hole and located at the large-diameter end of the shaft hole, and the inner diameter of the small-diameter end of the shaft hole is smaller than the outer diameter of the elastic sealing ring. The rotating shaft penetrates through the shaft hole and inner holes of all the elastic sealing rings, and the inner sides of the elastic sealing rings abut against the outer side of the rotating shaft in a sealed mode. The adjusting part is connected with the gland, the gland is provided with an extrusion end, the extrusion end penetrates through the large-diameter end of the shaft hole and abuts against the elastic sealing ring on the outermost side, and the adjusting part is used for adjusting the length of the extrusion end penetrating through the shaft hole. The shaft end sealing structure can adapt to the severe environment and is high in pollution resistance, and the reliability and durability of the double-horizontal-shaft stirring machine are improved.

Description

Technical Field

[0001] This application relates to the technical field of mixing equipment, and in particular, to a sealing module and a twin-shaft mixer. Background Art

[0002] In the field of concrete mixing equipment, twin-shaft mixers are widely used in domestic and foreign markets due to their efficient and uniform mixing performance. As one of its core components, the shaft-end sealing performance of the mixing shaft directly affects the working reliability and service life of the equipment. Currently, twin-shaft mixers generally adopt a floating oil seal structure as the shaft-end sealing solution. Its principle is to form a dynamic oil film between the contact surfaces through the precise cooperation of two floating sealing rings, and rely on continuously replenished lubricating grease to fill the assembly gap, so as to achieve good relative rotation while the sealing ring is closely attached to the inner wall of the mixing tank.

[0003] However, floating oil seals still have significant limitations in actual applications. Due to the harsh working environment of concrete mixers, strongly abrasive particles (such as cement, aggregates, etc.) generated during the mixing process are extremely likely to invade the sealing area. If the front seal of the floating seal (such as a dust seal or a skeleton seal) fails or is poorly designed, fine mortar particles will penetrate into the contact surface of the floating ring, destroying the integrity of the oil film, resulting in rapid wear or even jamming of the sealing ring. In addition, floating seals have extremely high requirements for assembly accuracy and the reliability of the lubrication system. Once the grease replenishment is insufficient or the channel is blocked, the lubrication conditions of the sealing surface deteriorate, accelerating seal failure. Although the existing technology can meet the sealing requirements in the short term, it still faces problems such as mortar invasion and insufficient lubrication under complex working conditions in the long term, seriously affecting the seal life and equipment stability. Summary of the Invention

[0004] In view of this, the purpose of this application is to overcome the deficiencies in the prior art and provide a sealing module and a twin-shaft mixer, which can have a shaft-end sealing structure that is more adaptable to harsh environments and has strong anti-pollution ability, so as to improve the reliability and durability of the twin-shaft mixer.

[0005] This application provides the following technical solutions: In the first aspect, an embodiment of this application provides a sealing module, which includes: An end cover, the end cover has a shaft hole, the shaft hole penetrates the end cover, and the shaft hole is a stepped hole; At least one elastic sealing ring, the at least one elastic sealing ring is arranged in the shaft hole, and the at least one elastic sealing ring is located at the large-diameter end of the shaft hole, and the inner diameter of the small-diameter end of the shaft hole is smaller than the outer diameter of the elastic sealing ring; A rotating shaft, the rotating shaft passes through the shaft hole and the inner holes of all the elastic sealing rings, and the inner side of the elastic sealing ring is in contact and sealed with the outer side of the rotating shaft; A gland and an adjusting member, the adjusting member being connected to the gland, the gland having an extrusion end, the extrusion end passing through the large-diameter end of the shaft hole and abutting against the outermost elastic sealing ring, and the adjusting member being used to adjust the length of the extrusion end passing through the shaft hole. In some embodiments of the first aspect, the elastic sealing ring is provided as packing.

[0006] In some embodiments of the first aspect, the packing is graphite packing.

[0007] In some embodiments of the first aspect, the gland has a mounting hole, the mounting hole penetrating the gland, the rotating shaft passing through the mounting hole with a clearance fit therebetween, the mounting hole being located at the extrusion end such that an annular extrusion end face is formed at the extrusion end, and the extrusion end face abutting against the outer side of the outermost elastic sealing ring.

[0008] In some embodiments of the first aspect, the adjusting member includes at least one adjusting bolt, the end cap having a threaded hole, the gland having a through hole, the adjusting bolt passing through the through hole and being threadedly connected to the hole wall of the threaded hole.

[0009] In some embodiments of the first aspect, the number of the adjusting bolts is multiple, and all the adjusting bolts are arranged at intervals along the circumferential side of the mounting hole.

[0010] In some embodiments of the first aspect, the adjusting member further includes at least one elastic gasket, the adjusting bolt sequentially passing through the elastic gasket and the through hole, the elastic gasket abutting against the gland, and the elastic gasket being in a deformed state.

[0011] In some embodiments of the first aspect, an oil storage groove is formed in the inner wall of the large-diameter end of the shaft hole, and the oil storage groove is filled with lubricating grease.

[0012] In a second aspect, an embodiment of the present application further provides a twin-shaft mixer, the twin-shaft mixer including a mixing drum and the sealing module as described in any one of the above embodiments, the mixing drum having a reserved hole, the end cap being connected to the mixing drum, and the end cap being used to close the reserved hole.

[0013] In some embodiments of the second aspect, the end cap and the mixing drum are detachably connected.

[0014] The embodiments of the present application have the following advantages: The present application provides a sealing module. The sealing module adopts a stepped shaft hole. The large-diameter end accommodates an elastic sealing ring (such as a rubber sealing ring), and the inner diameter of the small-diameter end is smaller than the outer diameter of the sealing ring, forming an axial limit. When the rotating shaft penetrates into the shaft hole, the inner side of the elastic sealing ring is closely attached to the shaft surface, forming a radial seal to prevent external contaminants (such as mortar particles) from invading. The gland controls the length of its extrusion end extending into the large-diameter end of the shaft hole through an adjusting member (such as a bolt or a threaded structure), thereby applying an adjustable axial pressure to the elastic sealing ring. The pressure is transmitted to the inner wall of the sealing ring, enhancing its contact tightness with the rotating shaft, adapting to the clearance changes caused by shaft surface wear or vibration, and maintaining a stable seal. If multiple elastic sealing rings are provided, multiple sealing barriers can be formed. The extrusion of the gland causes each sealing ring to be layered and compacted. Even if the previous seal fails due to particle invasion, the subsequent seal can still block contaminants, improving the overall anti-pollution ability.

[0015] Therefore, the close fit between the elastic sealing ring and the shaft surface effectively blocks mortar particles, and the stepped shaft hole structure further restricts the axial migration of contaminants, especially suitable for the high-wear environment of concrete mixers. By dynamically adjusting the gland pressure through the adjusting member, the clearance caused by seal wear or shaft eccentricity can be compensated, avoiding the seal failure caused by insufficient lubrication of traditional floating oil seals and extending the service life. Compared with floating oil seals, this module eliminates complex lubricating grease channels and precision mating rings, reduces the dependence on assembly accuracy, is convenient to maintain and has lower costs. The multi-sealing-ring design forms redundant sealing, and single-point failure does not cause the loss of the overall function, significantly improving the operating stability of twin-shaft mixers under harsh working conditions.

[0016] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following specifically gives preferred embodiments and, in conjunction with the accompanying drawings, makes the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other relevant drawings can also be obtained based on these drawings.

[0018] Figure 1 FIG. shows a schematic structural diagram of a sealing module provided by an embodiment of the present application from one perspective; Figure 2 FIG. shows a schematic structural diagram of a sealing module provided by an embodiment of the present application from another perspective.

[0019] MAIN ELEMENT SYMBOL DESCRIPTION: 100 - Agitating drum; 110 - Reserved hole; 200 - End cover; 300 - Gland; 310 - Extrusion end; 311 - Extrusion end face; 320 - Shaft hole; 330 - Mounting hole; 400 - Rotating shaft; 500 - Elastic sealing ring; 600 - Adjusting bolt. Detailed implementation manners

[0020] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for explaining the present application and should not be construed as limiting the present application.

[0021] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. On the contrary, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0022] In the present application, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0023] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "a plurality" is two or more unless otherwise clearly specifically defined.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the description of the present specification herein are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0025] In the related art, in the field of concrete mixing equipment, twin-shaft mixers are widely used in domestic and international markets due to their efficient and uniform mixing performance. As one of its core components, the shaft-end sealing performance of the mixing shaft directly affects the working reliability and service life of the equipment. At present, twin-shaft mixers generally adopt a floating oil seal structure as the shaft-end sealing solution. Its principle is to form a dynamic oil film between the contact surfaces through the precise fit of two floating sealing rings, and rely on continuously replenished lubricating grease to fill the assembly gap, so as to achieve good relative rotation while the sealing ring is tightly attached to the inner wall of the mixing tank.

[0026] However, the floating oil seal still has significant limitations in practical applications. Due to the harsh working environment of the concrete mixer, strongly abrasive particles (such as cement, aggregates, etc.) generated during the mixing process are extremely likely to invade the sealing area. If the front seal of the floating seal (such as a dust seal or a skeleton seal) fails or is poorly designed, fine mortar particles will penetrate into the contact surface of the floating ring, destroying the integrity of the oil film, resulting in rapid wear or even jamming of the sealing ring. In addition, the floating seal has extremely high requirements for assembly accuracy and the reliability of the lubrication system. Once the grease supply is insufficient or the channel is blocked, the lubrication condition of the sealing surface deteriorates, accelerating the seal failure. Although the existing technology can meet the sealing requirements in the short term, it still faces problems such as mortar invasion and insufficient lubrication under complex working conditions in the long term, seriously affecting the seal life and equipment stability.

[0027] As shown in FIGS. 1 and 2, to solve the above technical problems, an embodiment of the present application provides a sealing module. The sealing module includes an end cover 200, at least one elastic sealing ring 500, a rotating shaft 400, a gland 300 and an adjusting member. The end cover 200 has a shaft hole 320, the shaft hole 320 penetrates through the end cover 200, and the shaft hole 320 is a stepped hole. At least one elastic sealing ring 500 is disposed in the shaft hole 320, and at least one elastic sealing ring 500 is located at the large-diameter end of the shaft hole 320. The inner diameter of the small-diameter end of the shaft hole 320 is smaller than the outer diameter of the elastic sealing ring 500. The rotating shaft 400 passes through the shaft hole 320 and the inner holes of all the elastic sealing rings 500, and the inner side of the elastic sealing ring 500 abuts against the outer side of the rotating shaft 400 for sealing. The adjusting member is connected to the gland 300. The gland 300 has a pressing end 310. The pressing end 310 passes through the large-diameter end of the shaft hole 320 and abuts against the outermost elastic sealing ring 500. The adjusting member is used to adjust the length of the pressing end 310 passing through the shaft hole 320. In these embodiments, the present application provides a sealing module, which is applicable to the shaft-end sealing structure between the rotating shaft 400 and the end cover 200 in mixing equipment (such as a twin-shaft concrete mixer), and has good anti-pollution ability, adjustment flexibility and sealing reliability.

[0028] The sealing module includes an end cap 200, and a shaft hole 320 penetrating through its thickness direction is provided at the center of the end cap 200. In this embodiment, the shaft hole 320 is a stepped hole structure, including a large-diameter end and a small-diameter end. The large-diameter end is arranged on the side close to the outside and is used to accommodate the elastic sealing ring 500; the small-diameter end is arranged on the side close to the inside, and its inner diameter is smaller than the outer diameter of the elastic sealing ring 500, thereby forming a limiting step to prevent the elastic sealing ring 500 from moving towards the inside of the mixing tank.

[0029] The end cap 200 can be made of a metal material (such as cast iron or carbon steel) to ensure structural strength and wear resistance. Its surface can be rust-proof treated as needed, such as electroplating or spraying.

[0030] At least one elastic sealing ring 500 is arranged inside the large-diameter end of the shaft hole 320. In this embodiment, preferably two elastic sealing rings 500 are stacked and installed to enhance the sealing performance and improve the compressive capacity.

[0031] Each elastic sealing ring 500 has a central through hole for passing through the rotating shaft 400. The material of the elastic sealing ring 500 is preferably an oil-resistant rubber material, such as nitrile rubber (NBR) or fluororubber (FKM), which has good elasticity and wear resistance and can adapt to the vibration, temperature rise, and risk of particle intrusion generated during the operation of the mixing equipment.

[0032] The outer diameter of the elastic sealing ring 500 is slightly larger than the diameter of the large-diameter end of the shaft hole 320. During assembly, it is fixed in the shaft hole 320 of the end cap 200 through interference fit to ensure that it will not undergo axial displacement. At the same time, the size of the central through hole of the elastic sealing ring 500 is slightly smaller than the outer diameter of the rotating shaft 400, so as to form a tightly fitting dynamic sealing surface between it and the rotating shaft 400.

[0033] The rotating shaft 400 passes through the shaft hole 320 and the central through holes of all the elastic sealing rings 500. The outer peripheral surface of the rotating shaft 400 is in close contact with the inner side of the elastic sealing ring 500 to form an effective axial seal. Since the elastic sealing ring 500 has a certain compression deformation ability, it can maintain good sealing contact even during rotation, preventing impurities such as mortar from infiltrating.

[0034] The rotating shaft 400 can be a part of the main shaft or auxiliary shaft of the mixer, and its surface is polished or coated to reduce the friction coefficient and extend the sealing life.

[0035] To prevent the elastic sealing ring 500 from loosening or falling off during use, the sealing module further includes a gland 300 and an adjusting member.

[0036] The gland 300 is provided with a pressing end 310. The pressing end 310 is inserted into the large-diameter section of the shaft hole 320 and abuts against the outermost elastic sealing ring 500, playing a role of limiting and pre-tightening.

[0037] The adjusting member is used to adjust the axial position of the gland 300, thereby controlling the compression amount of the elastic sealing ring 500. In this embodiment, the adjusting member is a threaded connection structure, including an external thread section provided on the gland 300 and an internal thread hole provided on the end cover 200. By rotating the gland 300, the depth of the extrusion end 310 extending into the shaft hole 320 can be adjusted, thereby adjusting the stress state of the elastic sealing ring 500 to ensure that the sealing pressure is appropriate, neither too tight to cause wear nor too loose to affect the sealing performance.

[0038] As an alternative embodiment, the adjusting member can also adopt a snap-type, flange locking type or other mechanical adjusting mechanisms, as long as it can realize the adjustment of the position of the gland 300.

[0039] That is to say, the sealing module adopts a stepped shaft hole 320. The large-diameter end accommodates the elastic sealing ring 500 (such as a rubber sealing ring), and the inner diameter of the small-diameter end is smaller than the outer diameter of the sealing ring, forming an axial limit. When the rotating shaft 400 penetrates into the shaft hole 320, the inner side of the elastic sealing ring 500 is tightly attached to the shaft surface, forming a radial seal to prevent external contaminants (such as mortar particles) from invading. The gland 300 controls the length of its extrusion end 310 extending into the large-diameter end of the shaft hole 320 through an adjusting member (such as a bolt or a threaded structure), thereby applying an adjustable axial pressure to the elastic sealing ring 500. The pressure is transmitted to the inner wall of the sealing ring, enhancing its contact tightness with the rotating shaft 400, adapting to the gap change caused by shaft surface wear or vibration, and maintaining a stable seal. If multiple elastic sealing rings 500 are provided, multiple sealing barriers can be formed. The extrusion effect of the gland 300 compresses each sealing ring layer by layer. Even if the previous seal fails due to particle invasion, the subsequent seal can still block contaminants, improving the overall anti-pollution ability.

[0040] Therefore, the tight fit between the elastic sealing ring 500 and the shaft surface effectively blocks mortar particles, and the stepped shaft hole 320 structure further restricts the axial migration of contaminants, which is especially suitable for the high-wear environment of a concrete mixer. By dynamically adjusting the pressure of the gland 300 through the adjusting member, the gap caused by seal wear or shaft eccentricity can be compensated, avoiding the seal failure caused by insufficient lubrication of the traditional floating oil seal and extending the service life. Compared with the floating oil seal, this module eliminates the complex lubricating grease channels and precision mating rings, reduces the dependence on assembly accuracy, is convenient to maintain and has a lower cost. The multi-sealing ring design forms a redundant seal, and a single-point failure does not cause the loss of the overall function, significantly improving the operating stability of the twin-shaft mixer under harsh working conditions.

[0041] In some embodiments, the elastic sealing ring 500 is set as packing.

[0042] In these embodiments, the elastic sealing ring 500 is set as packing. As an alternative embodiment, in some other embodiments, the elastic sealing ring 500 can also be replaced with packing. Packing is a traditional sealing material, usually in the form of a ring or strip, wound and filled in the sealing cavity, and the sealing effect is achieved by pressing.

[0043] In these embodiments, the packing is assembled in the large-diameter end of the shaft hole 320 of the end cover 200 and is arranged around the rotating shaft 400. The outer side of the packing is in close contact with the shaft hole 320, and the inner side is in contact with the outer peripheral surface of the rotating shaft 400 to form a dynamic seal.

[0044] Exemplarily, the packing is graphite packing. Preferably, the packing is flexible graphite packing, which has excellent high-temperature resistance, self-lubrication and chemical stability, and is particularly suitable for harsh working conditions such as high dust, high temperature and strong wear. Flexible graphite packing can still maintain good sealing performance under non-lubricated conditions, avoiding the dependence of traditional floating oil seals on the grease system.

[0045] In addition, the graphite packing has a certain resilience and compressibility, and the sealing state can be controlled by adjusting the pressure applied by the gland 300 to ensure stable sealing under different rotational speeds and loads.

[0046] The rotating shaft 400 passes through the shaft hole 320 and the central through holes of all the sealing rings (or packing). The outer peripheral surface of the rotating shaft 400 is in close contact with the inner side of the sealing ring or packing to form an effective axial seal. Since the sealing element has a certain compression deformation ability, good sealing contact can still be maintained during rotation to prevent impurities such as mortar from infiltrating.

[0047] In some embodiments, the gland 300 has a mounting hole 330 that penetrates the gland 300. The rotating shaft 400 passes through the mounting hole 330, and the two are in clearance fit. The mounting hole 330 is located at the extrusion end 310, so that the extrusion end 310 forms an annular extrusion end face 311, and the extrusion end face 311 abuts against the outer side of the outermost elastic sealing ring 500.

[0048] In some embodiments, the gland 300 has a mounting hole 330 that penetrates the gland 300. The rotating shaft 400 passes through the mounting hole 330, and the two are in clearance fit. The mounting hole 330 is located at the extrusion end 310, so that the extrusion end 310 forms an annular extrusion end face 311, and the extrusion end face 311 abuts against the outer side of the outermost elastic sealing ring 500.

[0049] In these embodiments, the gland 300 is provided with a mounting hole 330 penetrating through its thickness direction. The rotating shaft 400 passes through the mounting hole 330 and has a clearance fit with it, that is, there is a certain gap between the two to avoid interference caused by assembly errors or thermal expansion, while not affecting the sealing performance.

[0050] The mounting hole 330 is arranged in the extrusion end 310 part of the gland 300, so that the extrusion end 310 forms an annular extrusion end face 311 in structure. This annular end face is in close contact with the outer end face of the outermost elastic sealing ring 500 (or packing), playing a role of evenly applying pressure to prevent seal failure caused by local stress.

[0051] Through this structural design, when the gland 300 is pushed by the adjusting member, it can evenly transfer the pressure to the sealing element, ensuring that it is evenly compressed as a whole and improving the sealing effect.

[0052] That is to say, through the annular extrusion end face 311 provided on the gland 300, uniform pressure can be applied to the sealing element, effectively preventing the seal failure problem caused by uneven local stress.

[0053] In some embodiments, the adjusting member includes at least one adjusting bolt 600. The end cover 200 has a threaded hole, and the gland 300 has a through hole. The adjusting bolt 600 passes through the through hole and is threadedly connected to the hole wall of the threaded hole.

[0054] In these embodiments, the adjusting member includes at least one adjusting bolt 600, preferably multiple (such as three or four) are provided and evenly distributed around the circumference of the gland 300 to achieve balanced adjustment.

[0055] The end cover 200 is provided with threaded holes corresponding to the number of adjusting bolts 600. The threaded holes extend axially and are arranged opposite to the gland 300. The gland 300 is provided with through holes. The adjusting bolts 600 pass through the through holes in sequence and are threadedly connected to the threaded holes on the end cover 200.

[0056] By screwing the adjusting bolt 600, the gland 300 can be driven to move axially, and then the depth of the extrusion end 310 extending into the shaft hole 320 can be adjusted, thereby controlling the compression amount of the elastic sealing ring 500 or packing. This adjustment method has a simple structure, convenient operation, and controllable adjustment accuracy, which is convenient for on-site maintenance and replacement.

[0057] As a preferred implementation manner, the head of the adjusting bolt 600 is provided with a locking gasket or a locking nut to prevent it from loosening during the operation of the equipment.

[0058] By adjusting the adjustment structure of the bolt 600 and the threaded hole, precise control of the position of the pressure cover 300 is achieved, which is convenient for the user to flexibly adjust the sealing pressure according to different working conditions, and further improves the applicability and reliability of the sealing module.

[0059] In some embodiments, there are multiple adjusting bolts 600 , and all the adjusting bolts 600 are arranged at intervals along the circumference of the mounting hole 330 .

[0060] In these embodiments, a plurality of adjusting bolts 600 are evenly arranged in the circumferential direction around the mounting hole 330 and keep a certain distance between each other to form a surrounding adjustment structure. This arrangement helps to improve the force balance of the gland 300 when it is subjected to force, and avoids tilting of the gland 300 or uneven pressure on the sealing element caused by single-point force.

[0061] Preferably, the number of the adjusting bolts 600 is three or four, and they are evenly spaced in the circumferential direction to ensure uniform distribution of the adjusting force and improve the overall working stability of the sealing module.

[0062] Through the adjustment structure of multiple adjustment bolts 600 evenly distributed along the periphery of the mounting hole 330, accurate and balanced control of the position of the pressure cover 300 is achieved, which facilitates the user to flexibly adjust the sealing pressure according to different working conditions, further improving the applicability and reliability of the sealing module.

[0063] In some embodiments, the adjusting member further includes at least one elastic gasket, the adjusting bolt 600 passes through the elastic gasket and the through hole in sequence, the elastic gasket abuts against the pressure cover 300, and the elastic gasket is in a deformed state.

[0064] In these embodiments, the elastic gasket may be a spring gasket, a corrugated gasket or a multi-layer composite elastic gasket. The elastic gasket is sleeved on the adjusting bolt 600 and is located between the head of the adjusting bolt 600 and the gland 300. When the adjusting bolt 600 is tightened, the elastic gasket is compressed and pre-deformed, thereby continuously applying a restoring force to the gland 300.

[0065] The elastic gasket generates a reverse force under pressure, which can effectively prevent the adjusting bolt 600 from loosening due to vibration during the operation of the equipment. As the sealing element wears, the elastic gasket can provide a certain displacement compensation to maintain the sealing pressure. When the equipment is started or stopped or vibrates suddenly, the elastic gasket can absorb part of the impact load and protect the sealing structure from damage. Through the continuous force of the elastic gasket, the gland 300 always applies a stable pressure to the sealing element, improving the long-term reliability of the seal.

[0066] In some embodiments, an oil storage groove is formed on the inner wall of the large diameter end of the shaft hole 320, and the oil storage groove is filled with grease.

[0067] In some embodiments, the embodiments of the present application further provide a double-shaft mixer, which includes a mixing drum 100 and a sealing module as described in any one of the above embodiments. The mixing drum 100 has a reserved hole 110. An end cover 200 is connected to the mixing drum 100, and the end cover 200 is used to close the reserved hole 110.

[0068] Since the above sealing module has the above technical effects, the double-shaft mixer including this sealing module should have the same technical effects, which will not be elaborated here.

[0069] In some embodiments, the end cover 200 and the mixing drum 100 are detachably connected.

[0070] In these embodiments, the end cover 200 is fixedly installed at the end of the mixing drum 100 through a detachable connection method. Preferably, the connection method is a bolt connection, that is, a plurality of mounting holes 330 are provided on the outer edge of the end cover 200, and corresponding threaded holes or flange structures are provided on the end face of the mixing drum 100. The bolts pass through the mounting holes 330 on the end cover 200 in sequence and are connected to the mixing drum 100 to achieve quick installation and disassembly.

[0071] This detachable structure has the following advantages: When the sealing module is worn or needs to be overhauled, the end cover 200 together with the sealing component can be removed without disassembling the mixing equipment as a whole, greatly improving the maintenance efficiency. Integrating the sealing module on the end cover 200 and existing as an independent unit is beneficial to standardized production and general interchangeability. Different types or materials of the end cover 200 and the sealing structure can be flexibly replaced according to the actual use environment to improve the applicability of the equipment.

[0072] As an alternative implementation, the end cover 200 can also be detachably connected by a quick-release flange type or other mechanical locking methods, as long as reliable fixation and convenient disassembly can be achieved.

[0073] In all the examples shown and described here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments can have different values.

[0074] It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0075] The above-described embodiments only represent several implementation manners of the present application. Their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application.

Claims

1. A sealing module, characterized in that, The sealing module includes: An end cap having a shaft hole that penetrates the end cap, and the shaft hole is a stepped hole; At least one elastic sealing ring disposed within the shaft hole and located at the large-diameter end of the shaft hole, and the inner diameter of the small-diameter end of the shaft hole is smaller than the outer diameter of the elastic sealing ring; A rotating shaft passing through the shaft hole and the inner holes of all the elastic sealing rings, and the inner side of the elastic sealing ring abuts and seals against the outer side of the rotating shaft; A gland and an adjusting member, the adjusting member is connected to the gland, the gland has an extrusion end that passes through the large-diameter end of the shaft hole and abuts against the outermost elastic sealing ring, and the adjusting member is used to adjust the length of the extrusion end passing through the shaft hole; 2. The sealing module according to claim 1, wherein, The elastic sealing ring is provided as packing; 3. The sealing module according to claim 2, characterized in that, The packing is graphite packing; 4. The sealing module according to claim 1, characterized in that, The gland has a mounting hole that penetrates the gland, the rotating shaft passes through the mounting hole with a clearance fit therebetween, the mounting hole is located at the extrusion end such that an annular extrusion end face is formed at the extrusion end, and the extrusion end face abuts against the outer side of the outermost elastic sealing ring; 5. The sealing module according to claim 4, characterized in that, The adjusting member includes at least one adjusting bolt, the end cap has a threaded hole, the gland has a through hole, and the adjusting bolt passes through the through hole and is threadedly connected to the inner wall of the threaded hole; 6. The sealing module according to claim 5, wherein, The number of the adjusting bolts is multiple, and all the adjusting bolts are arranged at intervals along the circumference of the mounting hole; 7. The sealing module according to claim 5, characterized in that, The adjusting member further includes at least one elastic gasket, the adjusting bolt sequentially passes through the elastic gasket and the through hole, the elastic gasket abuts against the gland, and the elastic gasket is in a deformed state; 8. The sealing module according to claim 1, characterized in that, An oil storage groove is formed in the inner wall of the large-diameter end of the shaft hole, and the oil storage groove is filled with grease; 9. A double-shaft mixer, characterized in that, The twin-shaft mixer includes a mixing drum and the sealing module according to any one of claims 1 to 8, the mixing drum has a reserved hole, the end cap is connected to the mixing drum, and the end cap is used to close the reserved hole; 10. The twin-shaft mixer according to claim 9, characterized in that, The end cap and the mixing drum are detachably connected.

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