Cooling structure and cooling method of lecithin dryer
By designing the sealing structure of the moving and static ring parts in the lecithin dryer, combining the lubricating channel and nozzle system, the water absorbing parts absorb the coolant, solving the pollution and explosion hazards caused by the coolant falling into the tank. Extend equipment life and reduce wear risk.
Patent Information
- Application Number
- CN202311872896.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-29
- Publication Date
- 2024-12-13
AI Technical Summary
During use of existing lecithin dryers, the coolant is prone to fall into the tank, resulting in product contamination and explosion hazards, and the machine seal structure wears and leads to liquid leakage.
A lecithin dryer cooling structure is designed, and the machine sealing structure of the moving ring and static ring are adopted. Local cooling and lubrication are carried out through lubricating channels and nozzle systems to reduce the amount of liquid, and absorb excess coolant by using water absorbing parts to reduce the Risk of wear and leakage.
It effectively reduces the amount of liquid in the sealing structure, reduces the risk of metal residues and lubricating oil entering the tank, extends the equipment life, and avoids product pollution and explosion risks.
Smart Images
Figure CN119123066A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of lecithin drying, and in particular to a cooling structure and a cooling method of a lecithin dryer. Background Art
[0002] Lecithin is a nutrient extracted from egg yolks and widely found in animals and plants. Its main components include phosphatidylcholine (PC), phosphatidylcholine (PE), inositol phospholipids (PI) and phosphatidic acid (PA). This nutrient-rich substance has many important physiological functions, including delaying aging, improving brain vitality, preventing and treating arteriosclerosis, relieving cardiovascular diseases, preventing fatty liver, and moisturizing the skin.
[0003] In the production process of lecithin, drying is a very important process step. Lecithin is dried by vacuum, which can effectively remove the organic solvent acetone and moisture contained in the product. The common lecithin dryer now basically adopts a vacuum structure, and in order to make the drying more complete, a stirring device is generally provided. The stirring device generally includes a stirring shaft arranged in the tank body and a stirring blade connected to the stirring shaft. The stirring shaft is driven to rotate by the bearing connected to the motor. During the rotation of the stirring shaft, lubrication is required to make the rotation smoother. Long-term rotation will generate heat at the position of the driving rotating connection, accelerate the wear between the moving mold and the static mold of the contact part, and easily produce residue. In order to better lubricate the various components that drive the rotating shaft to rotate, the relevant structure will be directly sealed by a mechanical seal, and then cooled by filling the coolant in the sealed space.
[0004] However, as the lecithin dryer is used for a longer time, the contact part between the existing mechanical seal and the stirring shaft will wear more, and a gap will be formed for metal residues, lubricating oil or coolant to fall into the tank. After these metal residues, lubricating oil or coolant fall into the tank, not only the dried lecithin product will be contaminated, but also it is very likely to cause explosion danger when it encounters flammable and explosive organic solvent acetone in the tank. Summary of the invention
[0005] The present invention is intended to provide a cooling structure for a lecithin dryer to solve the problem that excessive cooling liquid easily falls into the tank body as the lecithin dryer is used for a long time, causing product contamination or even explosion.
[0006] To solve the above problems, the following solutions are proposed:
[0007] Solution 1: A lecithin dryer cooling structure, used to cool a mechanical seal structure connected to a stirring shaft on a lecithin dryer, the mechanical seal structure comprising a moving ring and a stationary ring arranged outside the stirring shaft, the moving ring being fixedly connected to the stirring shaft, the stationary ring being fixedly connected to a tank body, and the upper end surface of the stationary ring being in contact with the lower end of the moving ring; the lecithin dryer cooling structure comprising a lubrication channel located on one side of the mechanical seal structure, the lubrication channel being located on one side of the moving ring and the stationary ring; a lubrication port being connected to the wall of the mechanical seal structure; a port for spraying coolant toward the stationary ring is provided on the lubrication port. a first nozzle; the lubrication port is also provided with a water absorbing member extending into the lubrication channel and in contact with the contact surface of the moving ring and the stationary ring; the water absorbing member is located below the first nozzle, and is used to absorb the coolant sprayed from the first nozzle; the water absorbing member extends from bottom to top along the lubrication channel to the contact position of the moving ring and the stationary ring, and the contact end of the water absorbing member on the outer side of the contact position between the moving ring and the stationary ring is a flexible end; the shape of the water absorbing member is the same as the direction shape of the lubrication channel, including a straight section connected to the lubrication port, a first bent section bent upward, and a second bent section bent toward the contact surface of the moving ring and the stationary ring.
[0008] Furthermore, the mechanical seal structure includes a lower end surface of the stabilizer and an upper end surface of the dynamic ring to form a single-end surface mechanical seal, and the first bent section is connected to a vertical section extending upward and in contact with the single-end surface mechanical seal.
[0009] Furthermore, the flexible end is located at a free end of the second bending segment and / or the vertical segment.
[0010] Furthermore, an overflow port is provided above the lubrication port, and a second nozzle is installed on the overflow port, and the second nozzle sprays coolant toward the single-end mechanical seal; the second nozzle is located above the free end of the vertical section.
[0011] The advantages of this solution are:
[0012] The present invention is directed to an improved mechanical seal structure of a lecithin dryer, and specifically provides a cooling structure of a lecithin dryer with very little cooling liquid. Compared with the current lecithin dryer, which needs to cool down by immersing the entire mechanical seal structure in cold water, the present invention reduces the number of end face mechanical seals by improving the internal structure of the mechanical seal structure, from the original double end face mechanical seals required at both ends to the current single end face mechanical seal; the present invention does not need to immerse the entire mechanical seal structure in cold water, but only needs to locally cool and lubricate the contact surfaces of the dynamic ring and the static ring through the water absorbing part and the first nozzle, thereby greatly reducing the presence of liquid in the mechanical seal structure and reducing liquid leakage that may be caused by wear.
[0013] In addition, the first nozzle is located above the straight section of the water absorbing member, and the second nozzle is located above the vertical section of the water absorbing member. The coolant sprayed by the second nozzle can directly act on the single-end face mechanical seal to cool it down, and the excess liquid can be absorbed by the vertical section and then continue to contact and lubricate it again. Although the coolant sprayed by the first nozzle cannot directly act on the contact surface of the moving ring and the stationary ring, it can eventually contact the outer side surface of the contact position of the moving ring and the stationary ring through the first bending section and the second bending section integrally connected with the straight section through the free end of the second bending section. The coolant coated thereon plays a cooling role and a lubricating role at the same time. At the same time, the water absorbing member is located below the first nozzle, and can also absorb the excess coolant sprayed by the first nozzle. With the relative rotation of the moving ring, the coolant on the water absorbing member is coated on all the contact surfaces of the moving ring and the stationary ring.
[0014] In addition, the coolant acting as a lubricant can be absorbed by the water-absorbing member and gathered at the end, so the lubricant can be applied between the contact surfaces of the moving ring and the stationary ring through the water-absorbing member. With this arrangement, the end faces of the moving ring and the stationary ring can obtain sufficient lubricating liquid for lubrication of the end faces, so the probability of wear between the end faces of the moving ring and the stationary ring can be reduced, the life of the equipment can be improved, and the generation of metal residues caused by long-term friction can be reduced.
[0015] The present invention can effectively reduce the amount of liquid in the mechanical seal structure above the tank filling port without affecting lubrication and cooling, thereby preventing liquid from leaking into the tank body; it can reduce the generation of metal residues due to mutual movement and wear of moving and static ring parts. The present invention effectively solves the problem that metal residues, coolant or lubricating oil are likely to fall into the tank body as the lecithin dryer is used for a long time, causing product contamination or even explosion risk.
[0016] Solution 2: The present invention also provides a lecithin dryer cooling method, which uses the aforementioned lecithin dryer cooling structure and comprises the following steps:
[0017] Step 1: spraying coolant into the mechanical seal structure through the first nozzle for a period of time T1 until the water absorbing member is soaked and then stopping the spraying;
[0018] Step 2: After the water absorbing member is bent upward along the lubrication channel, one flexible end of the water absorbing member contacts the outer side surfaces of the contact surfaces of the dynamic ring member and the static ring member respectively, and the other flexible end of the water absorbing member contacts the outer side surface of the single-end face mechanical seal of the mechanical seal structure;
[0019] Step three: As the stirring shaft rotates, the dynamic ring and the stationary ring are driven to rotate relatively, and the contact position between the flexible end and the dynamic ring and the stationary ring and the contact position between the flexible end and the single-end face mechanical seal are cooled by the coolant transmitted by the infiltration.
[0020] Furthermore, in step one, stopping spraying after the water absorbing member is soaked means stopping spraying of the first nozzle after the straight section and the first bent section of the water absorbing member are soaked in the cooling liquid.
[0021] Furthermore, in step one, stopping spraying after the water absorbing member is soaked means that the first nozzle stops spraying after the liquid level sensor installed on the first nozzle detects that the first nozzle is submerged.
[0022] Furthermore, in step 2, after the first nozzle stops spraying, the second nozzle is started to spray the coolant at an interval of T2, and the spraying is continued for T3 time, and the spraying is stopped after the vertical section of the water absorbing member is soaked.
[0023] Furthermore, T3 is smaller than T1.
[0024] Furthermore, the vertical section of the water-absorbing member being wetted refers to a state in which the vertical section starts to drip water downward after being wetted.
[0025] The advantages of this solution are:
[0026] According to actual needs, the spray amount of the first nozzle and the second nozzle can be reasonably switched by adjusting the size of each time period T1, T2, and T3, so as to keep the water absorbent part full of coolant without producing too much excess liquid, so that the flexible end in contact with the cooled position only needs to be lightly touched to achieve the purpose of coolant transfer, coating and heat dissipation. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 It is a structural diagram of embodiment 1 of the present invention.
[0028] Figure 2 for Figure 1 Partial schematic diagram of A in the figure.
[0029] Figure 3 It is a structural diagram of embodiment 2 of the present invention. DETAILED DESCRIPTION
[0030] The following is further described in detail through specific implementation methods:
[0031] The figure marks in the drawings of the specification include: bearing 21, single-end face mechanical seal 22, overflow port 23, lubrication port 24, first nozzle 25, second nozzle 26, water absorption part 27, dynamic ring part 28, stationary ring part 29, top plate 30, baffle 31, sleeve 32, first channel 33, second channel 34, horizontal discharge port 35, vertical discharge port 36, leakage discharge port 37, third channel 38, straight section 41, first bent section 42, second bent section 43, vertical section 44.
[0032] Embodiment 1
[0033] like Figure 1 As shown, the dryer cooling structure in this embodiment is used to cool the mechanical seal structure connected to the stirring shaft on the lecithin dryer, and the mechanical seal structure includes a dynamic ring 28 and a static ring 29 arranged outside the stirring shaft, the dynamic ring 28 is fixedly connected to the stirring shaft, the static ring 29 is fixedly connected to the tank body, and the upper end surface of the static ring 29 abuts against the lower end of the dynamic ring 28; the dryer cooling structure includes a lubrication channel located on one side of the mechanical seal structure, and the lubrication channel is located on one side of the dynamic ring 28 and the static ring 29; the lubrication channel is located on the mechanical seal structure A lubrication port 24 is connected to the structural wall; the lubrication port 24 is provided with a first nozzle 25 for spraying coolant toward the stationary ring 29; the lubrication port 24 is also provided with a water absorbing member 27 extending into the lubrication channel and in contact with the contact surfaces of the dynamic ring 28 and the stationary ring 29; the water absorbing member 27 is located below the first nozzle 25 and is used to absorb the coolant scattered from the first nozzle 25; the water absorbing member 27 extends from bottom to top along the lubrication channel to the contact position of the dynamic ring 28 and the stationary ring 29, and the contact ends of the water absorbing member 27 with the dynamic ring 28 and the stationary ring 29 are flexible ends.
[0034] Wherein, the flexible end is a sponge strip or a cotton strip with water absorption performance. Both the sponge strip and the cotton strip are materials with excellent water absorption performance, which can store as much coolant as possible without causing the coolant to drip and cause leakage hazards.
[0035] like Figure 2 As shown, the water absorbing member 27 has the same shape as the lubrication channel, including a straight section 41 connected to the lubrication port 24, a first bent section 42 bent upward, and a second bent section 43 bent toward the contact surface of the dynamic ring 28 and the static ring 29. The length of the first bent section 42 is greater than the straight section 41 and the first bent section 42. The angle between the first bent section 42 and the straight section 41 and the angle between the first bent section 42 and the second bent section 43 are both greater than 95 degrees and less than 180 degrees. Such a shape setting is conducive to allowing the straight section 41 to transfer the fully absorbed coolant to the end of the second bent section as soon as possible after being sprayed by the first nozzle, so that after quickly absorbing the coolant, the wet end is coated on the outer side of the contact position of the dynamic ring and the static ring, so that the coolant can enter the vicinity of the contact surface through the coating, thereby playing a cooling and lubricating role.
[0036] The free end of the second bending section 43 is a fan-shaped structure. The flexible end is located at the free end of the second bending section 43. It is convenient to absorb more coolant on the flexible material at the end of the free end, so that the amount of coolant applied is controlled within a suitable range, which will not cause excessive liquid and can fully cool and lubricate.
[0037] A plastic strip is provided inside the water absorbing member 27 for maintaining the bent shape of the water absorbing member 27, and the plastic strip is elastic. This facilitates the water absorbing member to extend upward along the shape of the lubricating channel, and at the same time plays a role in supporting the shape of the water absorbing material wrapped around the elastic plastic strip. The plastic strip is elastic, and it is also convenient to quickly reset when encountering slight resistance, so that the flexible end can always maintain the best coating position.
[0038] The lecithin dryer corresponding to the present embodiment includes a tank body for drying, a filling port is provided at the top of the tank body, a stirring shaft connected to a motor at the top extends from top to bottom into the tank body, a portion of the stirring shaft extending into the tank body is connected to a plurality of stirring blades, and a portion of the stirring shaft extending upward from the tank body is sealed and connected to the stirring shaft by an organic sealing structure.
[0039] The part of the stirring shaft extending out of the tank body is connected to the outside of a cylindrical stabilizer, and the stabilizer is used to reduce the swing of the stirring shaft; the part of the stirring shaft extending out of the tank body is connected to the outside of a shaft sleeve 32, and the stabilizer, a dynamic ring 28 and a static ring 29 are sequentially sleeved on the outside of the shaft sleeve 32 from top to bottom.
[0040] The upper end surface of the stabilizer and the dynamic ring 28 forms a single end face mechanical seal 22. Compared with the existing double end face mechanical seal, the single end face mechanical seal 22 requires less lubrication and cooling, so that the amount of liquid required is smaller, and the liquid is prevented from leaking into the tank body by reducing the amount of liquid from the source.
[0041] The top of the tank body is provided with a top plate 30 outside the filling port, and a baffle 31 is provided between the sleeve 32 and the top plate 30 below the stationary ring 29 to prevent debris from entering the filling port. The baffle 31 is vertically arranged, and the bottom of the main sleeve 32 is provided with a limit opening for the baffle 31 to be inserted. Through the arrangement of the limit opening at the bottom of the sleeve 32 and the baffle 31, the baffle 31 is connected to the top plate 30 and inserted upward into the limit opening, so that the baffle 31 and the sleeve 32 constrain each other to be vertical, and the gap between the filling port and the sleeve 32 is sealed to prevent the possibility of entering the tank body from there.
[0042] The mechanical seal structure includes a dynamic ring 28 and a static ring 29 arranged outside the stirring shaft, the dynamic ring 28 is fixedly connected to the stirring shaft, the static ring 29 is fixedly connected to the tank body, and the upper end surface of the static ring 29 abuts against the lower end of the dynamic ring 28; a lubrication channel is provided on one side of the dynamic ring 28 and the static ring 29, and a water absorbent 27 is provided on one side of the lubrication channel for extending into the lubrication channel and contacting with the contact surface of the dynamic ring 28 and the static ring 29; a lubrication port 24 is provided on one side of the mechanical seal structure for the water absorbent 27 to extend into the lubrication channel, and a first nozzle 25 is provided on the lubrication port 24 for spraying coolant to the dynamic ring 28 and the static ring 29, and the first nozzle 25 is located above the water absorbent 27; all water absorbents 27 have a liquid adsorption function.
[0043] The end of the water absorbing member 27 is provided with a lubricating member, which is a flexible water absorbing material that can directly contact the end surface of the moving ring member 28 and the stationary ring member 29. The water absorbing member 27 is in the shape of a long strip, and a plastic spring is provided in the end of the water absorbing member 27 away from the moving ring member 28. The water absorbing member 27 is in the shape of a long strip, which is convenient for accurately contacting the position near the contact surface of the moving ring member 28 and the stationary ring member 29 in a small range. While reducing the amount of liquid, it also reduces the contact area between the water absorbing member 27 and the moving ring member 28 and the stationary ring member 29, reduces the relative resistance to the rotation of the moving ring member 28, and does not affect the normal rotation of the moving ring member 28. By arranging a plastic spring at a place far away from the moving and stationary rings, it is not only helpful to maintain the long strip shape of the water absorbing member 27, but also conducive to the water absorbing strip being able to return to the best contact position with the moving ring member 28 and the stationary ring member 29 after being deviated due to external force, and at the same time, it is conducive to the water absorbing member 27 returning to the position below the first nozzle 25, which is most conducive to absorbing the sprayed coolant.
[0044] The top plate 30 is provided with a foreign matter collecting device, which includes a first channel 33 located at the bottom of the sleeve 32 for collecting foreign matters blocked by the baffle 31, a second channel 34 located below the first channel 33 and connected to the first channel 33, a foreign matter outlet connected to the second channel 34, and a vacuum pump connected to the foreign matter outlet. When foreign matters including metal residues, coolant, etc. fall from the top to the bottom and are blocked outside the first channel 33 by the baffle 31, the vacuum pump, through the second channel 34 connected thereto, sequentially absorbs the foreign matters from the first channel 33, the second channel 34, and the foreign matter outlet by negative pressure adsorption, thereby cleaning the generated foreign matters and further avoiding the possibility of foreign matters falling into the tank body.
[0045] The foreign matter discharge port includes a transverse discharge port 35 horizontally connected to the second channel 34, and a vertical discharge port 36 vertically connected to the second channel 34. When not in use, both ports can be blocked with a blocking member, and when in use, the pipeline of the vacuum pump can be directly extended into the corresponding discharge port to temporarily connect with the second channel 34.
[0046] The length of the second passage is more than twice the length of the first passage 33. While being able to collect foreign matter, it is convenient for the vacuum pump to communicate and adsorb.
[0047] The mechanical seal structure is provided with a leakage discharge port 37 on the opposite side of the lubrication port 24 . The leakage discharge port 37 is located above the foreign matter discharge port. The leakage discharge port 37 is connected to a third channel 38 located below the stationary ring 29 .
[0048] Through the third channel 38, the liquid falling from top to bottom under the static ring 29 is discharged from the leakage discharge port 37, which helps to facilitate the collection of foreign matter later. The leakage discharge port can also be connected to a vacuum pump to absorb the leakage through the negative pressure of the vacuum pump.
[0049] An overflow port 23 is provided above the lubrication port 24. Excessive coolant can flow out through the overflow port 23 to avoid accumulation.
[0050] In this embodiment, the first nozzle 25 can be an ordinary nozzle. The outsides of the two nozzles are connected to a hose for conveying coolant. The nozzles can be remotely controlled. The nozzles themselves and their use are conventional means and will not be described in detail here. The existing connection structure between the nozzles and the hoses is not shown in the figure.
[0051] In this embodiment, the water-absorbing component can be fixed in a variety of existing ways, for example, by sticking the straight section of the water-absorbing component to the inner wall of the lubrication port with tape, connecting the end of the straight section to the threaded hole already opened on the side wall of the lubrication port with screws, or even pulling the end of the straight section out of the lubrication port and directly sticking it with tape or screwing it to the outer wall of the mechanical seal structure.
[0052] In this embodiment, the plastic strip is integrally formed, and the water-absorbing material is pasted or wrapped around the periphery of the plastic strip. When installing the water-absorbing member, because the entire water-absorbing member is elastic due to the paint strip, after the straight section passes through the lubrication channel from top to bottom and out of the lubrication port, the entire water-absorbing member is fixed by fixing the straight section.
[0053] When the lecithin dryer is cooled by the aforementioned lecithin dryer, the following steps are included:
[0054] Step 1: Start the first nozzle, and spray the coolant into the mechanical seal structure toward the static ring through the first nozzle and the coolant hose connected thereto, and spray the coolant for T1 time until the water absorbent is soaked and then the spraying stops; in this embodiment, the spraying stops after the water absorbent is soaked, which means that the spraying of the first nozzle stops after the straight section and the first bending section of the water absorbent are immersed in the coolant. It is ensured that the first nozzle provides enough liquid for the water absorbent to absorb completely without forming excess liquid, that is, it is ensured that the amount of liquid sprayed by the first nozzle is just the amount that the water absorbent can absorb completely.
[0055] In step 2, after the water absorbent is bent upward along the lubrication channel, one flexible end of the water absorbent contacts the outer side surfaces of the contact surfaces of the dynamic ring and the static ring respectively, and the other flexible end of the water absorbent contacts the outer side surface of the single-end face mechanical seal of the mechanical seal structure; in step 2, after the first nozzle stops spraying, the second nozzle is started to spray coolant at an interval of T2 time, and the spraying continues for T3 time, and the spraying stops after the vertical section of the water absorbent is soaked. The vertical section of the water absorbent is soaked, which means that the vertical section starts to drip downward after being soaked. Ensure that all parts of the water absorbent can fully absorb the coolant without generating too much excess liquid.
[0056] Step three: As the stirring shaft rotates, the dynamic ring and the stationary ring are driven to rotate relatively, and the contact position between the flexible end and the dynamic ring and the stationary ring and the contact position between the flexible end and the single-end face mechanical seal are cooled by the coolant transmitted by the infiltration.
[0057] In this embodiment, T3 is less than T1. The vertical section of the water-absorbing member only needs to be coated with the single-end mechanical seal, and the position of the vertical section that does not contact the single-end mechanical seal must also be filled with coolant. Therefore, the spraying time of the second nozzle is less than the spraying time of the first nozzle to avoid excessive spraying, which will form excess liquid that cannot be absorbed by the water-absorbing member from top to bottom.
[0058] The cooling method can reasonably switch the spray amount of the first nozzle and the second nozzle by adjusting the size of each time period T1, T2, and T3 according to actual needs, so as to keep the water absorbent part always full of coolant without producing too much excess liquid, so that the flexible end in contact with the cooled position only needs to be lightly touched to achieve the purpose of coolant transfer, coating, and heat dissipation.
[0059] This embodiment provides a new lecithin dryer by improving the mechanical seal structure above the tank body. Compared with the existing lecithin dryer, it is necessary to cool down the entire mechanical seal structure by immersing it in cold water, and an end face mechanical seal needs to be installed near the bearing 21, as well as at the positions of the moving ring and the stabilizer. The present invention reduces the number of end face mechanical seals by improving the internal structure of the mechanical seal structure, and only needs to retain a single end face mechanical seal 22 between the moving ring 28 and the stabilizer; the present invention does not need to immerse the entire mechanical seal structure in cold water, and only needs to locally cool and lubricate the contact surface of the moving ring 28 and the stationary ring 29 through the water absorbing member 27 and the first nozzle 25, thereby greatly reducing the presence of liquid in the mechanical seal structure and reducing liquid leakage that may be caused by wear.
[0060] In addition, the first nozzle 25 is located above the water absorbing member 27, and the coolant sprayed by the first nozzle 25 directly acts on the contact surface of the moving ring member 28 and the stationary ring member 29, playing a cooling role and a lubricating role. The water absorbing member 27 with liquid absorption is located below the first nozzle 25, and can absorb the excess coolant sprayed by the first nozzle 25 well, and when the first nozzle 25 is not spraying, the water absorbing member 27 contacts the contact surface of the moving ring member 28 and the stationary ring member 29, and plays a contact lubrication and cooling role. With the relative rotation of the moving ring member 28, the coolant on the water absorbing member 27 is applied to the entire contact surface of the moving ring member 28 and the stationary ring member 29. At the same time, the soaked water absorbing member 27 also has a certain metal residue absorption effect, and can collect metal residues by regularly replacing the water absorbing member 27.
[0061] In addition, the coolant acting as a lubricant can be absorbed by the water absorbing member 27 and gathered at the end, so that the lubricant can be applied between the contact surfaces of the moving ring 28 and the stationary ring 29 through the water absorbing member 27. With this arrangement, the end faces of the moving ring 28 and the stationary ring 29 can obtain sufficient lubricating liquid for lubrication of the end faces, so the probability of wear between the end faces of the moving ring 28 and the stationary ring 29 can be reduced, the life of the equipment can be improved, and the generation of metal residues due to long-term friction can be reduced.
[0062] The present invention can effectively reduce the amount of liquid in the mechanical seal structure above the tank filling port without affecting lubrication and cooling, thereby preventing liquid from leaking into the tank body; it can reduce the generation of metal residues due to mutual movement and wear of the moving ring 28 and the static ring 29. The present invention effectively solves the problem that metal residues, coolant or lubricating oil are likely to fall into the tank body as the lecithin dryer is used for a longer time, causing product contamination or even explosion risk.
[0063] Embodiment 2
[0064] like Figure 1As shown, in this embodiment, the mechanical seal structure includes a stabilizer and an upper end surface of the dynamic ring 28 to form a single-end face mechanical seal 22, and the first bent section 42 is connected to a vertical section 44 extending upward and in contact with the single-end face mechanical seal 22.
[0065] like Figure 3 As shown, in this embodiment, a second nozzle 26 is installed on the overflow port 23 of the outer wall of the mechanical seal structure, and the structure and installation method of the second nozzle 26 are the same as those of the first nozzle 25. The second nozzle 26 is located above the free end of the vertical section 44. The second nozzle 26 sprays coolant toward the single-end mechanical seal 22. The coolant directly acts on the outer side of the single-end mechanical seal 22 to cool down, and the excess coolant can be absorbed by the vertical section 44 of the water absorbing member below.
[0066] The second nozzle 26 is installed at the upper position of the overflow port 23, and does not completely block the overflow port 23, so as not to affect the use of the overflow port 23. At the same time, the single-end mechanical seal 22 can be cooled and lubricated separately through the second nozzle 26.
[0067] The free end of the vertical section 44 is the same as the free end of the second bent section 43, which is a flexible end with good water absorption, and can store as much coolant as possible without generating excess liquid flow, thereby facilitating the cooling of the single-end mechanical seal.
[0068] Embodiment 3
[0069] The difference between this embodiment and the first embodiment is that when the aforementioned lecithin dryer cooling structure is used to cool the lecithin dryer, in step one, the spraying is stopped after the water-absorbing member is soaked, which means that the first nozzle spraying is stopped after the liquid level sensor installed on the first nozzle detects that the first nozzle is immersed. The first nozzle in this embodiment adopts an existing waterproof nozzle, and a liquid level sensor is attached and installed on the front side surface of the front end of the nozzle near the top, and the liquid level sensor is used to detect whether the nozzle is immersed. During the short-term immersion of the nozzle, the nozzle itself and the straight section of the water-absorbing member together become one of the parts that block the lubrication port, so that the straight section can quickly absorb and expand in this small amount of accumulated liquid and transfer the cooling liquid to the flexible end above that is in direct contact with the cooled surface.
[0070] Embodiment 4
[0071] In this embodiment, the size of each time period T1, T2, and T3 is related to the working state of the lecithin dryer. According to the working temperature and working time of the lecithin dryer, T1, T2, and T3 can be adjusted under the premise that the spraying speeds of the first nozzle and the second nozzle are the same. Generally speaking, when the lecithin dryer is in the best working state, T3 is less than one-half of T1, and T2 is less than one-quarter of T3. With this arrangement, the cooling liquid spraying conditions can be flexibly switched, and sufficient cooling liquid can be applied to the cooled surface at the ends of the second bending section and the vertical section without generating excess flowing liquid.
[0072] The above is only an embodiment of the present invention, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.
Claims
1. A cooling structure for a lecithin dryer, used for cooling a mechanical seal structure connected to a stirring shaft on a lecithin dryer, characterized in that: The mechanical seal structure comprises a moving ring and a stationary ring arranged outside the stirring shaft, wherein the moving ring is fixedly connected to the stirring shaft, the stationary ring is fixedly connected to the tank body, and the upper end surface of the stationary ring abuts against the lower end of the moving ring; the lecithin dryer cooling structure comprises a lubrication channel located on one side of the mechanical seal structure, wherein the lubrication channel is located on one side of the moving ring and the stationary ring; a lubrication port is connected to the lubrication channel and the wall of the mechanical seal structure; a first nozzle is provided on the lubrication port for spraying coolant toward the stationary ring; a water absorbing member is also provided on the lubrication port, which extends into the lubrication channel and contacts the contact surfaces of the moving ring and the stationary ring; The water absorbing member is located below the first nozzle and is used to absorb the coolant sprayed from the first nozzle; the water absorbing member extends from bottom to top along the lubrication channel to the contact position between the dynamic ring member and the static ring member, and the contact end of the water absorbing member on the outer side of the contact position between the dynamic ring member and the static ring member is a flexible end; the shape of the water absorbing member is the same as the direction of the lubrication channel, including a straight section connected to the lubrication port, a first bent section bent upward, and a second bent section bent toward the contact surface of the dynamic ring member and the static ring member.
2. The cooling structure of the lecithin dryer according to claim 1, characterized in that: The mechanical seal structure includes a lower end surface of a stabilizer and an upper end surface of a dynamic ring member to form a single-end surface mechanical seal, and the first bent section is connected to a vertical section extending upward and in contact with the single-end surface mechanical seal.
3. The cooling structure of the lecithin dryer according to claim 2, characterized in that: The flexible end is located at the free end of the second bending segment and / or the vertical segment.
4. The cooling structure of the lecithin dryer according to claim 3, characterized in that: An overflow port is provided above the lubrication port, and a second nozzle is installed on the overflow port. The second nozzle sprays coolant toward the single-end mechanical seal; the second nozzle is located above the free end of the vertical section.
5. A lecithin dryer cooling method, characterized in that: The lecithin dryer cooling structure according to claims 1-4 is adopted, comprising the following steps: Step 1: spraying coolant into the mechanical seal structure through the first nozzle for a period of time T1 until the water absorbing member is soaked and then stopping the spraying; Step 2: After the water absorbing member is bent upward along the lubrication channel, one flexible end of the water absorbing member contacts the outer side surfaces of the contact surfaces of the dynamic ring member and the static ring member respectively, and the other flexible end of the water absorbing member contacts the outer side surface of the single-end face mechanical seal of the mechanical seal structure; Step three: As the stirring shaft rotates, the dynamic ring and the stationary ring are driven to rotate relatively, and the contact position between the flexible end and the dynamic ring and the stationary ring and the contact position between the flexible end and the single-end face mechanical seal are cooled by the coolant transmitted by the infiltration.
6. The lecithin dryer cooling method according to claim 5, characterized in that: In step 1, the spraying is stopped after the water absorbing member is soaked, which means that the spraying of the first nozzle is stopped after the straight section and the first bent section of the water absorbing member are soaked in the cooling liquid.
7. The lecithin dryer cooling method according to claim 5, characterized in that: In step 1, the spraying is stopped after the water absorbing member is soaked, which means that the spraying of the first nozzle is stopped after the liquid level sensor installed on the first nozzle detects that the first nozzle is immersed.
8. The lecithin dryer cooling method according to claim 5, characterized in that: In step 2, after the first nozzle stops spraying, the second nozzle is started to spray the coolant at an interval of T2, and the spraying is continued for T3 time, and the spraying is stopped after the vertical section of the water absorbing member is soaked.
9. The lecithin dryer cooling method according to claim 8, characterized in that: T3 is smaller than T1.
10. The lecithin dryer cooling method according to claim 8, characterized in that: The vertical section of the water-absorbing member being wet refers to a state in which water drips downward from the vertical section.