Shaft sleeve device of stirring shaft of digestion tank

Abstract

The utility model discloses a shaft sleeve device of a stirring shaft of a digestion tank. The shaft sleeve device comprises a shaft sleeve and a sealing ring, the shaft sleeve comprises a two-half fastening sleeve and a two-half bearing bush which are sleeved inside and outside; the two-half type fastening sleeve comprises two fastening sleeve tiles, and the two fastening sleeve tiles are used for embracing the periphery of the stirring shaft in a tight fit manner after being buckled; the two-half bearing bush comprises two bearing pieces, a shaft hole is formed between the two bearing pieces after the two bearing pieces are buckled, a spiral oil guide groove is formed in the inner wall of the shaft hole, and an oil injection hole is formed in the outer wall of the two-half bearing bush and communicated with the shaft hole. The outer wall of the two-half fastening sleeve is in clearance fit with the inner wall of the shaft hole of the two-half bearing bush; and the sealing ring is used for sleeving the stirring shaft and tightly and cooperatively blocking one end, close to the digestion tank, of the shaft sleeve. Therefore, the sealing ring is arranged to prevent digestion sludge leaked from the digestion tank from intruding into mechanical parts, the spiral oil guide groove is adopted, a gap between lubricating grease top sealing parts in the two half type bearing bushes is actively controlled through rotary motion, and sludge intruding is further prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of anaerobic fermentation of kitchen waste, in particular to a shaft sleeve device of a stirring shaft of a digestion tank. Background Art

[0002] In recent years, as the garbage classification and treatment work in various cities in China has been gradually rolled out, the treatment and disposal facilities for terminal kitchen waste have been rapidly developed. There are many cases of kitchen waste projects that have been built and are under construction in China. Among them, horizontal dry multi-axis anaerobic digestion technology has been widely used in the treatment of kitchen waste. At present, the bearing unit of the stirring shaft of the horizontal multi-axis dry anaerobic fermentation tank for kitchen waste is composed of roller bearings, bearing frames, bearing covers and skeleton oil seals. The roller bearing fits tightly with the stirring main shaft, the bearing frame supports the roller bearing, and the bearing cover and skeleton oil seal seal the grease in the bearing unit. When installing the bearing unit, add grease to the roller bearing, and regularly pump the grease into the bearing unit through a manual pump.

[0003] Since the horizontal anaerobic digester is a continuous production mode, in order to ensure the stable and continuous operation of the agitator shaft, the agitator shaft is generally designed and installed in the form of a packing labyrinth seal from the tank wall to the shaft surface. Through the packing gland, countless labyrinths are formed to intercept the fermented sludge in the tank and prevent the fermented sludge in the tank from escaping to the external environment. Since the kitchen waste contains impurities such as sand, gravel, and glass, the impurity particles can wear the sealing packing during the continuous rotation of the agitator shaft. When the wear reaches a certain degree, the packing sealing effect decreases, and the sludge in the tank will leak out from the seal, which will cause serious problems such as corrosion and wear to the mechanical parts such as the agitator shaft and the bearing unit.

[0004] Specifically, if the sealing packing is worn, the fermented sludge in the tank will leak directly from the packing seal and invade the gaps of mechanical parts such as the stirring shaft and bearing unit, causing negative effects such as wear and corrosion on the stirring shaft. First, the fine hard impurities contained in the fermented sludge will accumulate in the gaps between the mechanical parts. As the stirring shaft rotates, the hard impurities will wear the mechanical parts. For example, the diameter of the stirring shaft will be reduced due to wear, causing permanent damage, resulting in a decrease in the rigidity of the stirring shaft. As the wear gap increases, it will be easier to accumulate sand, gravel, glass, etc., which will further lead to more serious wear. Secondly, due to the accumulation of sludge caused by the wear of mechanical parts, the sludge will be exposed to the environment, causing greater environmental and odor pollution to the surrounding area. If it is not cleaned in time, the fermented sludge will be air-dried and hardened, increasing the difficulty of manual cleaning.

[0005] Therefore, in order to isolate the sand and corrosive substances in the sludge from invading the mechanical parts of the agitator shaft, protect the existing damaged agitator shaft, and ensure its normal operation, it has become a major problem in the operation and management of the horizontal dry anaerobic digester. Utility Model Content

[0006] The utility model aims to provide a shaft sleeve device for a stirring shaft of a digestion tank, which has the advantages of preventing sludge from wearing the stirring shaft and bearing components and ensuring the normal operation of the stirring shaft.

[0007] In order to achieve the above purpose, the solution of the utility model is:

[0008] A shaft sleeve device for a stirring shaft of a digester tank, comprising a shaft sleeve and a sealing ring;

[0009] The shaft sleeve comprises a two-half fastening sleeve and two-half bearing bushings arranged inside and outside;

[0010] The two-half fastening sleeve comprises two fastening sleeve tiles, which are buckled to tightly fit around the outer periphery of the stirring shaft;

[0011] The two-half bearing shell comprises two bearing shells, and the two bearing shells are buckled to form a shaft hole between them. The inner wall of the shaft hole is provided with a spiral oil guide groove, and the outer wall of the two-half bearing shell is provided with an oil injection hole, which is connected to the shaft hole and is used to inject lubricating grease.

[0012] The outer wall of the two-half fastening sleeve is gap-matched with the inner wall of the shaft hole of the two-half bearing bush;

[0013] The sealing ring is used to be sleeved on the stirring shaft and tightly seal the end of the shaft sleeve close to the digestion tank;

[0014] One end of the spiral oil guide groove close to the sealing ring is an open end connected to the end faces of the two half-type bearing shells, and the other end is a closed end not connected to the end faces of the two half-type bearing shells.

[0015] Furthermore, it also includes a nylon sleeve, which is used to be sleeved on the stirring shaft and is closely attached to the side of the sealing ring away from the sleeve.

[0016] Furthermore, it also includes an automatic lubricating grease pumping machine, which is connected to the oil filling hole through a filling pipe and is used for automatically filling the oil filling hole with oil.

[0017] Furthermore, it also includes a sewage discharge pipe, which is connected to the bottom of the sealing ring and is used to collect sludge leaked from the digester and lubricating grease leaked from the sleeve device.

[0018] Furthermore, the sealing ring is a split sealing ring, the nylon sleeve is a two-half structure, and the nylon sleeve of the two-half structure is provided with an external clamp structure to be fixedly connected to the stirring shaft.

[0019] Furthermore, the two-half bearings are provided with bearing support frames, which are used to fix the two-half bearings; there are four bearing support frames; one end of a bearing support frame is locked on both sides of the circumference of each bearing piece, and the other end of each bearing support frame is used to be connected and fixed to the digester tank.

[0020] Furthermore, at least two first locking holes are axially spaced apart on the end surfaces of the two fastening sleeve tiles that are tightly attached to each other, and each first locking hole extends tangentially through the outer wall surface of the fastening sleeve tiles; after the two fastening sleeve tiles are buckled, the first locking holes on the adjacent end surfaces correspond to each other, and the two fastening sleeve tiles are locked and fixed by using the first stud to pass through the corresponding first locking holes, and the length of the first stud does not extend out of the outer wall surface of the two fastening sleeve tiles.

[0021] Furthermore, two or more second locking holes are axially spaced apart on the end surfaces of the two bearing shells that are in close contact with each other, and each second locking hole extends tangentially through the outer wall surface of the bearing shell; after the two bearing shells are buckled, the second locking holes on the adjacent end surfaces correspond to each other, and the two bearing shells are locked and fixed by using second studs to pass through the corresponding second locking holes.

[0022] Furthermore, the spiral oil guide groove includes at least one circle of first spiral groove, and the first spiral groove extends from one end of one bearing shell to the other end of another bearing shell; the cross-section of the first spiral groove is semicircular.

[0023] Furthermore, the spiral oil guide groove also includes at least one circle of second spiral groove, which also extends from one end of one bearing shell to the other end of another bearing shell; the second spiral groove and the first spiral groove have opposite rotation directions and are staggered with each other; the cross-section of the second spiral groove is semicircular.

[0024] After adopting the above technical scheme, the two-half bearing shell can be used as a bearing, allowing the stirring shaft and the two-half fastening sleeve to rotate freely in the shaft hole; the shaft sleeve can replace the original bearing of the stirring shaft of the anaerobic digester, that is, it can be installed on a new stirring shaft, and the damaged stirring shaft can also be protected by the buckled two-half fastening sleeve; at the same time, the shaft sleeve device of the utility model can prevent the anaerobic fermentation sludge leaking from the digester to the environment from invading the stirring shaft and other mechanical parts, and can avoid further expansion of the wear and damage of the worn stirring shaft.

[0025] Specifically, the oil filling hole is used to inject lubricating grease to form an oil film between the two-half bearing shells and the two-half fastening sleeves in the shaft hole, thereby lubricating both sides; moreover, during the rotation of the agitator shaft, the lubricating grease in the two-half bearing shells will flow to one side of the sealing ring under the action of the spiral oil guide groove, and will eventually be isolated by the sealing ring, thereby preventing the lubricating grease from leaking into the environment.

[0026] Therefore, when sludge leakage occurs in the digester, a sealing ring is first provided to prevent the leaked digested sludge from the digester from invading the mechanical parts. Furthermore, a spiral oil guide groove is adopted in the two-half bearing shell. The lubricating grease in the two-half bearing shell is actively controlled by the rotation motion to flow out along the open end and seal the gap between the parts, thereby further preventing the sludge from invading. Thus, the two methods work at the same time, thereby avoiding the negative effects of wear, corrosion and other effects on the mechanical parts by the sludge as much as possible. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of an embodiment of the utility model when applied;

[0028] Figure 2 A three-dimensional diagram of the embodiment of the utility model in cooperation with the stirring shaft;

[0029] Figure 3 A cross-sectional view of an embodiment of the utility model in cooperation with a stirring shaft;

[0030] Figure 4 A three-dimensional diagram of an embodiment of the utility model;

[0031] Figure 5 This is an exploded view of an embodiment of the utility model (I);

[0032] Figure 6 This is an exploded view of an embodiment of the utility model (II);

[0033] Figure 7 It is a three-dimensional diagram of the two-half bearing and the bearing support frame of the embodiment of the utility model.

[0034] Explanation of reference numerals: bushing 1, two-half fastening sleeve 11, fastening sleeve tile 111, first locking hole 112, first stud 113, two-half bearing shell 12, bearing shell 121, shaft hole 122, bearing shell support frame 123, screw 124, second locking hole 125, second stud 126, spiral oil guide groove 13, open end 13a, closed end 13b, first spiral groove 131, second spiral groove 132, oil filling hole 14, sealing ring 2, nylon sleeve 3, sewage pipe 4, automatic lubricating grease pump 5, refueling pipe 51, stirring shaft 6, digester tank 7. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0036] like Figures 1 to 7As shown, the shaft sleeve device of the stirring shaft of the digester tank of the utility model comprises a shaft sleeve 1, a sealing ring 2, a nylon sleeve 3, a sewage discharge pipe 4 and an automatic lubricating grease pump 5.

[0037] The shaft sleeve 1 comprises a two-half fastening sleeve 11 and a two-half bearing bush 12 arranged inside and outside;

[0038] The two-half fastening sleeve 11 includes two fastening sleeve tiles 111. The fastening sleeve tiles 111 of this embodiment can be made of alloy steel. The two fastening sleeve tiles 111 are buckled together to fit tightly around the outer periphery of the stirring shaft 6, which can not only protect the damaged stirring shaft 6, but also enhance the strength of the new stirring shaft 6.

[0039] The two-half bearing 12 includes two bearing pieces 121, which can be made of bronze. The two bearing pieces 121 are buckled to form an axial hole 122. The inner wall of the axial hole 122 is provided with a spiral oil guide groove 13, and the outer wall of the two-half bearing 12 is provided with an oil filling hole 14, which is connected to the axial hole 122 and is used to inject lubricating grease; the outer wall of the two-half fastening sleeve 11 is gap-fitted with the inner wall of the axial hole 122 of the two-half bearing 12; the sealing ring 2 is used to be sleeved on the agitator shaft 6, and is tightly sealed on the end of the sleeve 1 close to the digester 7.

[0040] One end of the spiral oil guide groove 13 close to the sealing ring 2 is an open end 13a connected to the end surfaces of the two half-type bearing shells 12, and the other end is a closed end 13b not connected to the end surfaces of the two half-type bearing shells 12.

[0041] See also Figure 1 and Figure 2 The two-half bearing 12 can be used as a bearing, allowing the stirring shaft 6 and the two-half fastening sleeve 11 to rotate freely in the shaft hole 122; specifically, the sleeve 1 device can be used to replace the original bearing of the stirring shaft 6 of the digester 7, that is, it can be installed on a new stirring shaft 6, and the damaged stirring shaft 6 can also be protected by the buckled two-half fastening sleeve 11; at the same time, the sleeve 1 device of the utility model can prevent the anaerobic fermentation sludge leaking from the digester 7 to the environment from invading the stirring shaft 6 and other mechanical parts, and can avoid further expansion of the wear and damage of the worn stirring shaft 6.

[0042] Specifically, the oil filling hole 14 is used to inject lubricating grease to form an oil film between the two-half bearing shell 12 and the two-half fastening sleeve 11 in the shaft hole 122, thereby lubricating both sides; moreover, during the rotation of the stirring shaft 6, the lubricating grease in the two-half bearing shell 12 will flow toward the side of the sealing ring 2 under the action of the spiral oil guide groove 13, and may flow out from the open end 13a, and finally be isolated by the sealing ring 2, thereby preventing the lubricating grease from leaking into the environment; and when the lubricating grease flows to the other end of the spiral oil guide groove 13, it will be blocked by the blocking end 13b.

[0043] Therefore, when sludge leakage occurs in the digester 7, a sealing ring 2 is first provided to prevent the digested sludge leaking from the digester 7 from invading the mechanical parts. Furthermore, a spiral oil guide groove 13 is adopted in the two-half bearing 12 to actively control the lubricating grease in the two-half bearing 12 to flow out along the open end 13a through the rotational motion to seal the gap between the parts, thereby further preventing the sludge from invading. Thus, the two methods work at the same time, and can try to avoid the negative effects of wear, corrosion and other effects on the mechanical parts caused by the sludge.

[0044] like Figure 3 As shown, the nylon sleeve 3 is used to be sleeved on the stirring shaft 6 and is closely attached to the side of the sealing ring 2 away from the sleeve 1. The nylon sleeve 3 can be made of polyamide fiber. On the one hand, the nylon sleeve 3 prevents the digestion sludge of the digestion tank 7 from invading the sleeve 1 component, and on the other hand, further seals the lubricating grease in the sleeve 1 from escaping to the environment.

[0045] Further, the sealing ring 2 may be a split sealing ring (not shown), for example, a commonly used split oil seal, and the nylon sleeve 3 may also be a two-half structure (not shown), and the two-half nylon sleeve 3 may be fixedly connected to the stirring shaft 6 through an external clamp structure. Thus, by providing the two-half fastening sleeve 11, the two-half bearing bushing 12, the split sealing ring 2 and the two-half nylon sleeve 3, the original bearing can be replaced without removing the drive motor, which can shorten the maintenance time and improve the maintenance efficiency.

[0046] See also Figure 1 The automatic lubricating grease pumping machine 5 is connected to the oil filling hole 14 through the oil filling pipe 51, and is used to automatically fill the oil filling hole 14. The automatic lubricating grease pumping machine 5 can be equipped with a lubricating grease pump body, a pumping pressure sensor, a grease storage tank, a grease level switch and a control system. By setting the grease pumping volume and pumping cycle through the control system, the function of automatically pumping lubricating grease to the two-half bearing 12 can be realized, and the control system detects the pumping pressure to determine the lubricating grease filling amount in the two-half bearing 12. The automatic lubricating grease pumping machine 5 also has a time setting function, a low grease inventory alarm, and an abnormal working warning function, and can switch between automatic and manual pumping operations.

[0047] The sewage pipe 4 is connected to the bottom of the sealing ring 2 and the nylon sleeve 3 to collect the sludge leaked from the digester 7 and the lubricating grease leaked from the shaft sleeve 1.

[0048] like Figure 1 and Figure 4As shown, the two-piece bearing 12 may be provided with a bearing support frame 123, which is used to fix the two-piece bearing 12. Specifically, there may be four bearing support frames 123; one end of a bearing support frame 123 is respectively locked by screws 124 on both sides of each bearing piece 121 in the circumferential direction, and the other end of each bearing support frame 123 is used to connect and fix with the digestion tank 7. In this way, the relative position of the two-piece bearing 12 with respect to the stirring shaft 6 can be maintained fixed, so that the stirring shaft 6 can rotate in the shaft hole 122.

[0049] Of course, the bearing support frame 123 and the bearing plate 121 can also be an integrated structure.

[0050] like Figure 5 and Figure 6 As shown, at least two first locking holes 112 are axially spaced apart on the end surfaces of the two fastening sleeve tiles 111 that are in close contact with each other. In this embodiment, two first locking holes 112 are set on each end surface as an example; each first locking hole 112 extends tangentially through the outer wall surface of the fastening sleeve tile 111; after the two fastening sleeve tiles 111 are buckled, the first locking holes 112 on the adjacent end surfaces correspond to each other, and the two fastening sleeve tiles 111 are locked and fixed by passing the first studs 113 through the corresponding first locking holes 112, so that the two fastening sleeve tiles 111 can tightly hold the stirring shaft 6, and the length of the first studs 113 does not extend out of the outer wall surface of the two fastening sleeve tiles 111, so as to avoid interference with the rotation of the two half fastening sleeves 11.

[0051] Similarly, more than two second locking holes 125 may be axially spaced apart on the end surfaces of the two bearing shells 121 that are in close contact with each other. The present embodiment also takes the example of setting two second locking holes 125 on each end surface; each second locking hole 125 extends tangentially through the outer wall surface of the bearing shell 121; after the two bearing shells 121 are buckled together, the second locking holes 125 on the adjacent end surfaces correspond to each other, and the two bearing shells 121 are locked and fixed by passing the second studs 126 through the corresponding second locking holes 125.

[0052] For example Figures 5 to 7 As shown, the spiral oil guide groove 13 of this embodiment includes a circle of first spiral grooves 131, and the first spiral grooves 131 extend from one end of one bearing shell 121 to the other end of another bearing shell 121; the cross-section of the first spiral grooves 131 is semicircular.

[0053] like Figure 7 As shown, in this embodiment, the spiral oil guide groove 13 also includes a circle of second spiral grooves 132, and the second spiral grooves 132 also extend from one end of one bearing shell 121 to the other end of the other bearing shell 121; and the second spiral grooves 132 and the first spiral grooves 131 rotate in opposite directions, and the two are staggered with each other; the cross-section of the second spiral grooves 132 is also semicircular.

[0054] By making the spiral oil guide groove 13 include two spiral grooves in different directions, no matter which direction the stirring shaft 6 rotates, the lubricating grease can be driven to flow toward the sealing ring 2. The number of turns of the first spiral groove 131 and the second spiral groove 132 can be more than one turn, which can be set according to the actual scene.

[0055] Thus, the lubricating grease can flow toward the sealing ring 2 side as the stirring shaft 6 rotates.

[0056] In summary, the working process of the shaft sleeve 1 device of the utility model can be as follows:

[0057] If it is used on a damaged agitator shaft 6, it is necessary to remove the original damaged roller bearing, bearing seat and other parts, remove the stains adhering to the agitator shaft 6 and clean the agitator shaft 6. Then proceed with the following installation steps:

[0058] First, the two-half fastening sleeve 11 of the device is installed on the stirring shaft 6, the upper and lower fastening sleeve tiles 111 are connected by the first studs 113, and the first studs 113 are locked to make the two-half fastening sleeve 11 fit tightly against the stirring shaft 6. The gap between the stirring shaft 6 and the two-half fastening sleeve 11 is avoided by the fitting seal, and the damaged position of the stirring shaft 6 is protected.

[0059] Secondly, install the two-half bearing 12 flush on the two-half fastening sleeve 11, connect the upper and lower bearing pieces 121 with the second stud 126, and lock the second stud 126 to ensure the two bearing pieces 121 are stably combined. During installation, pay attention to the correct alignment of the spiral oil guide groove 13 in the two-half bearing 12.

[0060] Furthermore, the bearing support frame 123 is installed, one end of the bearing support frame 123 is fixed to the embedded part of the digester 7, and the other end is connected to the bearing plate 121 and fixed with screws 124.

[0061] Furthermore, the sealing ring 2 is installed on the side of the shaft sleeve 1 close to the mud leakage of the digester 7. On the one hand, the sealing ring 2 can prevent the leaked mud from the digester 7 from invading the device components. On the other hand, it can isolate the lubricating grease between the two-half fastening sleeve 11 and the two-half bearing shell 12 from the external environment, making it difficult for the lubricating grease to leak.

[0062] Furthermore, the nylon sleeve 3 is installed close to the sealing ring 2 on the side near the digestion tank 7 to prevent large particles of digested sludge escaping from the digestion tank 7 from invading the sealing ring 2.

[0063] Finally, the filling pipe 51 of the automatic lubricating grease pumping machine 5 is connected to the oil filling hole 14. A sewage pipe 4 is provided below the sealing ring 2 of the shaft sleeve 1 device to collect the leaked digested sludge and the escaping lubricating grease.

[0064] During operation:

[0065] First, the automatic grease pumping machine 5 is started to replenish the grease to the shaft sleeve 1 through the pipeline and the oil filling hole 14, forming an oil film between the two-half bearing shell 12 and the two-half fastening sleeve 11 to lubricate both.

[0066] Secondly, the stirring shaft 6 driving motor will drive the stirring shaft 6 to rotate, the two-half fastening sleeve 11 is rigidly fitted with the stirring shaft 6, and it will rotate with the stirring shaft 6, while the two-half bearing shell 12 is connected to the bearing shell support frame 123, and will be in a static state to realize the bearing function. Under the action of the spiral oil guide groove 13, the lubricating grease in the two-half bearing shell 12 flows to the side of the sealing ring 2, and the sealing ring 2 isolates the grease to prevent leakage to the environment. The automatic lubricating grease pumping machine 5 regularly replenishes lubricating grease to the two-half bearing shell 12 according to the time setting cycle. It is equipped with a pumping pressure sensor. The pumping machine control system receives the pressure sensor signal and identifies it. If the sealing ring 2 operates normally, after the lubricating grease fills the bearing shell, due to the obstruction of the sealing ring 2, the grease pumping pressure will rise abnormally, and the automatic lubricating grease pumping machine 5 will automatically stop working; if the sealing ring 2 fails to isolate the leakage of lubricating grease, the pressure sensor has no pressure rise signal, and the lubricating grease will continue to leak from the sealing ring 2. After continuous pumping for a period of time, the automatic lubricating grease pumping machine 5 automatically stops working and sends out an alarm signal, prompting to replace the sealing ring 2 or check the equipment parts. The automatic lubricating grease pumping machine 5 has a manual switching function. By manually starting to add grease, the pressure sensor value and grease adding time are set according to the operating conditions, thereby improving the flexibility of the device and fully adapting to the actual working conditions on site.

[0067] The utility model can have at least the following advantages:

[0068] (1) The two-half fastening sleeve 11 fits tightly against the stirring shaft 6, which can protect the stirring shaft 6 of the horizontal anaerobic digester 7 to a certain extent, and improve the strength of the damaged stirring shaft 6, extend the service life, and save the cost of repairing the stirring shaft 6.

[0069] (2) Not only is the sealing ring 2 used to prevent the digestion sludge from leaking from the digester from invading the mechanical parts, but the spiral oil guide groove 13 in the two-half bearing 12 is also used to actively control the gap between the lubricating grease top sealing parts through rotational motion, further preventing the sludge from invading. In this way, the two methods work at the same time to try to avoid the negative effects of wear and corrosion on the mechanical parts caused by the sludge.

[0070] (3) The automatic grease pumping machine 5 can not only set the time to pump grease to the shaft sleeve component regularly, but the control system can also determine the amount of grease added and whether the sealing ring 2 is working normally through the pumping pressure value obtained by the pumping pressure sensor. If the sealing ring 2 wears out and fails, the grease is continuously pumped, and an abnormal working warning can be issued to the maintenance personnel according to the setting, so as to facilitate timely maintenance of the two-half bearing 12 and the sealing ring 2.

[0071] (4) By providing a two-half fastening sleeve 11, a two-half bearing shell 12, a split sealing ring 2 and a two-half structural nylon sleeve 3, the original bearing can be replaced without removing the drive motor, which can shorten the maintenance time and improve the maintenance efficiency.

[0072] The above is only a preferred embodiment of the utility model, and the protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, equivalent changes and modifications without departing from the principle of the utility model should still fall within the protection scope of the utility model.

[0073] In the description of the embodiments of the present application, it should be understood that the indicated orientation or position relationship is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the application is usually placed when in use, or is the orientation or position relationship commonly understood by technical personnel in this field. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0074] In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "multiple" and "several" is two or more, unless otherwise clearly and specifically defined.

[0075] In addition, the present application provides examples of various specific processes and materials, but a person skilled in the art may be aware of the application of other processes and / or the use of other materials.

Claims

1. The shaft sleeve device of the digester stirring shaft is characterized by: Including shaft sleeve and sealing ring; The shaft sleeve comprises a two-half fastening sleeve and two-half bearing bushings arranged inside and outside; The two-half fastening sleeve comprises two fastening sleeve tiles, which are buckled to tightly fit around the outer periphery of the stirring shaft; The two-half bearing shell comprises two bearing shells, and the two bearing shells are buckled to form a shaft hole between them. The inner wall of the shaft hole is provided with a spiral oil guide groove, and the outer wall of the two-half bearing shell is provided with an oil injection hole, which is connected to the shaft hole and is used to inject lubricating grease. The outer wall of the two-half fastening sleeve is gap-matched with the inner wall of the shaft hole of the two-half bearing bush; The sealing ring is used to be sleeved on the stirring shaft and tightly seal the end of the shaft sleeve close to the digestion tank; One end of the spiral oil guide groove close to the sealing ring is an open end connected to the end faces of the two half-type bearing shells, and the other end is a closed end not connected to the end faces of the two half-type bearing shells.

2. The shaft sleeve device of the digester stirring shaft according to claim 1 is characterized in that: It also includes a nylon sleeve, which is used for being sleeved on the stirring shaft and closely attached to a side of the sealing ring away from the shaft sleeve.

3. The shaft sleeve device of the digester stirring shaft according to claim 1, characterized in that: The utility model also comprises an automatic lubricating grease pumping machine, which is connected with the oil filling hole through a filling pipe and is used for automatically filling the oil filling hole with oil.

4. The shaft sleeve device of the digester stirring shaft according to claim 1, characterized in that: It also includes a sewage pipe, which is connected to the bottom of the sealing ring and is used to collect sludge leaked from the digester tank and lubricating grease escaped from the sleeve device.

5. The shaft sleeve device of the stirring shaft of the digester according to claim 2, characterized in that: The sealing ring is a split sealing ring, the nylon sleeve is a two-half structure, and the nylon sleeve of the two-half structure is provided with an external clamp structure to be fixedly connected to the stirring shaft.

6. The shaft sleeve device of the digester stirring shaft according to claim 1, characterized in that: The two-half bearing shells are provided with bearing support frames, which are used to fix the two-half bearing shells; there are four bearing support frames; one end of a bearing support frame is locked on both sides of the circumference of each bearing shell, and the other end of each bearing support frame is used to connect and fix with the digester tank.

7. The shaft sleeve device of the digester stirring shaft according to claim 1, characterized in that: Two or more first locking holes are axially spaced apart on the end surfaces of the two fastening sleeve tiles that are tightly attached to each other, and each first locking hole extends tangentially through the outer wall surface of the fastening sleeve tiles; after the two fastening sleeve tiles are buckled, the first locking holes on the adjacent end surfaces correspond to each other, and the two fastening sleeve tiles are locked and fixed by using the first studs to pass through the corresponding first locking holes, and the length of the first studs does not extend out of the outer wall surfaces of the two fastening sleeve tiles.

8. The shaft sleeve device of the digester stirring shaft according to claim 1, characterized in that: Two or more second locking holes are axially spaced apart on the end surfaces of the two bearing shells that are tightly attached to each other, and each second locking hole extends tangentially through the outer wall surface of the bearing shell; after the two bearing shells are buckled, the second locking holes on the adjacent end surfaces correspond to each other, and the two bearing shells are locked and fixed by using second studs to pass through the corresponding second locking holes.

9. The shaft sleeve device of the stirring shaft of the digester according to claim 1, characterized in that: The spiral oil guide groove includes at least one circle of first spiral groove, which extends from one end of one bearing shell to the other end of another bearing shell; the cross-section of the first spiral groove is semicircular.

10. The shaft sleeve device of the stirring shaft of the digester according to claim 9, characterized in that: The spiral oil guide groove also includes at least one circle of second spiral groove, which also extends from one end of one bearing shell to the other end of another bearing shell; the second spiral groove and the first spiral groove have opposite rotation directions and are staggered with each other; the cross-section of the second spiral groove is semicircular.

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