Mechanical seal assembly for hydration reactor kettle
By adopting the moving ring and push ring R transmission, independent spring compensation and double O-ring sealing structure in the hydration reactor kettle, the problem of poor mechanical sealing stability of the hydration reactor is solved, and the long-term operation and smooth production of the equipment are achieved.
Patent Information
- Application Number
- CN202420460044.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-11
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-03-11
AI Technical Summary
The mechanical seal of domestic hydration reactors is monopolized by import companies, the equipment has poor operating stability, frequent maintenance, and untimely supply of spare parts, resulting in safety hazards and high maintenance costs.
A mechanical sealing assembly for hydration reactor kettle was designed, using a moving ring and push ring R transmission, independent spring compensation, a double O-ring mechanical sealing structure of the radial and axial direction of the static ring and the static ring seat, and a lubricated The roller assembly enables easy installation and reliable use of mechanical seals.
It improves the service life of the equipment, reduces the frequency of maintenance and on-site environmental pollution, ensures the smooth progress of production, and achieves long-term operation stability.
Smart Images
Figure CN222255061U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a mechanical seal, in particular to a mechanical seal assembly for a hydration reactor kettle. Background Art
[0002] Hydration refers to the reaction process in which a water molecule combines with the molecule of another substance to form a molecule, that is, the hydrogen atoms and hydroxyl groups in the water molecules add to the unsaturated bonds of the substance molecules to form a new compound. This process is called hydration.
[0003] The earliest application of the hydration process in organic chemical industry was the hydration of acetylene to produce acetaldehyde in Germany in 1913. The main applications in industry are as follows:
[0004] 1. Olefin hydration: an important method for preparing alcohols. The most widely used methods in industry are ethylene hydration to produce ethanol and propylene hydration to produce isopropanol.
[0005] 2. Hydration of epoxy compounds: This is an important method for preparing diols, mainly hydration of ethylene oxide to produce ethylene glycol, and hydration of propylene oxide to produce propylene glycol:
[0006] 3. Hydration of nitrile: This is an important method for industrial production of amides, such as the hydration of acrylonitrile to produce acrylamide:
[0007] 4. Alkyne hydration: mainly acetylene hydration to produce acetaldehyde.
[0008] The hydration process is one of the organic synthesis methods, but as an important production method, it is still limited to a few types of products, such as ethanol and diols.
[0009] At present, the mechanical seal of the hydration reactor in China is basically monopolized by foreign companies, and the price of the whole machine and spare parts is expensive. Since the hydration reaction is the front stage of the hydrogenation reaction, the dynamic ring of the imported mechanical seal adopts the design of fork transmission and shared spring, and the seal of the static ring to the static ring seat adopts the radial O-ring seal. Due to the large shaft diameter of 240, affected by the working conditions in the reactor, the radial and axial runout of the mechanical seal will exceed the current national standards, so the operation stability is poor, and leakage often occurs after about 3 months of use, and there are many problems such as short operation time, which brings great hidden dangers to the safe and stable operation of the device; and the imported spare parts are not supplied in time, which greatly increases the manpower and financial costs of on-site maintenance. Utility Model Content
[0010] Therefore, in order to solve the above-mentioned shortcomings, the utility model provides a mechanical seal assembly for a hydration reactor kettle with a reasonable design and ingenious structure, which is easy to install and reliable to use, reduces the maintenance frequency and on-site environmental pollution, increases the service life of the equipment, and ensures the smooth progress of production.
[0011] Specifically, a mechanical seal assembly for a hydration reactor kettle is provided with a lower stationary ring seat, a sealing cavity and an upper stationary ring seat installed on the kettle body in sequence at the top of the kettle body, a mechanical seal located between the upper stationary ring seat and the lower stationary ring seat is installed in the sealing cavity through a shaft sleeve, and the shaft sleeve is fixedly installed on the equipment shaft;
[0012] A sealing liquid inlet connected to the interior of the sealing cavity is provided on the lower stationary ring seat, and a sealing liquid outlet connected to the interior of the sealing cavity is provided on the upper stationary ring seat. The sealing liquid enters the sealing cavity from the lower sealing liquid inlet and is discharged from the higher sealing liquid outlet.
[0013] Optionally, the mechanical seal includes, from top to bottom, an upper static ring, an upper dynamic ring, a lower dynamic ring and a lower static ring.
[0014] The upper static ring is fixedly connected to the upper static ring seat, and the lower static ring is fixedly connected to the lower static ring seat;
[0015] The upper moving ring contacts the upper static ring, the lower moving ring contacts the lower static ring, and a boosting assembly is arranged between the upper moving ring and the lower moving ring.
[0016] Optionally, the booster assembly includes a spring seat, an upper push ring and a lower push ring, the spring seat is fixedly connected to the shaft sleeve, and a plurality of springs installed on the spring seat are arranged between the upper push ring and the lower push ring;
[0017] The upper push ring is transmission connected to the upper movable ring, and the lower push ring is transmission connected to the lower movable ring.
[0018] Optionally, the transmission connection is a transmission of tenons and grooves, specifically: a plurality of concave Rs on the upper and lower moving rings correspond one-to-one with a plurality of convex Rs on the push ring to achieve transmission.
[0019] Optionally, a bearing seat is connected to the upper part of the upper stationary ring seat, and the bearing seat is fixedly installed on the equipment kettle body through screws with the upper stationary ring seat, the sealing cavity and the lower stationary ring seat. Two groups of bearings mounted on the shaft sleeve are arranged inside the bearing seat, and the gap between the two bearings is adjustable, wherein a bearing lock nut mounted on the shaft sleeve is arranged above the upper bearing;
[0020] A grease injection port for injecting grease into the bearing is provided on the bearing seat, and an oil cup is installed on the grease injection port.
[0021] Optionally, two symmetrically arranged roller assemblies are fixedly mounted on the bearing seat.
[0022] Optionally, the roller assembly includes a roller shaft and a roller, the roller shaft is connected to the bearing seat via a thread, and the roller is mounted on the roller shaft via a needle bearing.
[0023] Optionally, a closed cavity for accommodating the needle bearing is formed between the roller shaft and the roller;
[0024] A lubrication hole connected with the sealing cavity and used for injecting lubricating oil into the sealing cavity is opened on the roller shaft, and a plug is arranged at the inlet end of the lubrication hole.
[0025] The assembly process of the mechanical seal assembly for the hydration reactor kettle is as follows:
[0026] First, install several anti-rotation pins and bottom O-rings on the lower stationary ring seat, align the pin hole of the lower stationary ring with the anti-rotation pin, then install the radial O-ring, put the clamping ring, and fix it on the lower stationary ring seat with several screws. Similarly, install the upper stationary ring into the upper stationary ring seat. Install the two bearings into the sleeve, separate them with inner and outer washers in the middle to adjust the gap, lock the bearing locking nut on the sleeve, insert the stop washer into the sleeve and locking nut, and fix it on the locking nut with screws; install the skeleton oil seal into the bearing seat and the upper stationary ring seat respectively, then put the sleeve with the bearing into the bearing box, install the upper stationary ring seat (with skeleton oil seal and upper stationary ring), and then install the dynamic ring, dynamic ring O-ring, push ring with several transmission pins at the bottom, several springs, and spring seat with double O-rings in turn. When installing the push ring, pay attention to the one-to-one correspondence between the convex R and the concave R of the dynamic ring; install several springs into the spring hole in the spring seat, and then install the spring seat with O-rings. Pay attention to the one-to-one correspondence between the pin hole and the transmission pin of the push ring, and then use several set screws to fix the spring seat on the sleeve. When fixing, pay attention to aligning the set screws with the set screw holes on the sleeve to ensure the compression of the spring; then install several springs in the spring holes of the spring seat in turn, put in the push ring, pay attention to the one-to-one correspondence between the transmission pin at the bottom of the push ring and the pin hole of the spring seat, put in the dynamic ring with O-ring, pay attention to the one-to-one correspondence between the concave R and the convex R of the push ring; seal the sealing cavity with the upper static ring seat with O-ring, and use several screws to connect the bearing seat, upper static ring seat and sealing cavity as a whole; finally, install the lower static ring seat with the lower static ring, and use several screws to connect the lower static ring seat and the sealing cavity as a whole.
[0027] The assembly of the roller assembly is as follows: a needle bearing is placed on the roller shaft, a roller and a retaining ring are sequentially installed, grease is injected from the roller shaft, and then the grease injection hole is blocked with a plug.
[0028] Screw the roller assembly into the outer threaded hole of the bearing seat, calculate the L dimension according to the on-site track size, and weld the retaining rings 204 at both ends to the roller shaft to ensure smooth installation on site.
[0029] The utility model has the following advantages:
[0030] The utility model has reasonable design and ingenious structure. It is a mechanical seal assembly for a hydration reactor kettle. It is easy to install and reliable to use, reduces the frequency of maintenance and on-site environmental pollution, increases the service life of the equipment, and ensures smooth production. The utility model adopts a dynamic ring and a push ring R transmission (i.e., a convex tenon and a groove matching transmission), independent spring compensation, a radial and axial double O-ring mechanical seal structure between a static ring and a static ring seat, and a lubricated roller structure for the mechanical seal of the integral kettle. It solves the problem of operational stability and realizes long-term operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0031] Figure 1 It is a structural schematic diagram of the utility model;
[0032] Figure 2 It is a schematic diagram of the installation structure of the mechanical seal of the utility model;
[0033] Figure 3 It is a structural schematic diagram of the roller assembly of the utility model;
[0034] In the figure: 1. lower static ring seat; 2. shaft sleeve; 3. sealing cavity; 4. upper static ring seat; 5. skeleton oil seal; 6. bearing; 7. outer gasket; 8. inner gasket; 9. bearing seat; 10. skeleton oil seal; 11. bearing lock nut; 100. mechanical seal; 101. lower static ring; 102. upper static ring; 103. lower moving ring; 104. upper moving ring; 105. upper push ring; 106. lower push ring; 107. spring; 108. spring seat; 109. clamping ring; 110. transmission pin; 200. roller assembly; 201. roller shaft; 202. roller; 203. needle roller bearing; 204. retaining ring; 205. lubrication hole; 206. plug. DETAILED DESCRIPTION
[0035] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.
[0036] In this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises", or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article, or apparatus.
[0037] As described in the background technology, the mechanical seal of the hydration reactor in China is basically monopolized by foreign companies, and the price of the whole machine and spare parts is expensive. Since the hydration reaction is the front stage of the hydrogenation reaction, the dynamic ring of the imported mechanical seal adopts the design of fork transmission and shared spring, and the seal of the static ring to the static ring seat adopts the radial O-ring seal. Due to the large shaft diameter of 240, affected by the working conditions in the reactor, the radial and axial runout of the mechanical seal will exceed the current national standards, so the operation stability is poor, leakage often occurs after about 3 months of use, and there are many problems such as short operation time, which brings great hidden dangers to the safe and stable operation of the device; and the imported spare parts are not supplied in time, which greatly increases the manpower and financial costs of on-site maintenance.
[0038] Based on this problem, this embodiment provides a mechanical seal assembly for a hydration reactor, wherein a lower stationary ring seat 1, a sealing cavity 3 and an upper stationary ring seat 4 installed on the equipment kettle body are sequentially arranged at the top of the kettle body, and a mechanical seal 100 located between the upper stationary ring seat 1 and the lower stationary ring seat 4 is installed in the sealing cavity through a shaft sleeve 2, and the shaft sleeve 2 is fixedly installed on the equipment shaft;
[0039] A sealing liquid inlet connected to the interior of the sealing cavity is provided on the lower stationary ring seat 1, and a sealing liquid outlet connected to the interior of the sealing cavity is provided on the upper stationary ring seat 4. The sealing liquid enters the sealing cavity from the lower sealing liquid inlet and is discharged from the higher sealing liquid outlet.
[0040] The mechanical seal includes, from top to bottom, an upper stationary ring 102, an upper movable ring 104, a lower movable ring 103 and a lower stationary ring 101. The upper stationary ring 102 is fixedly connected to the upper stationary ring seat 4, and the lower stationary ring 101 is fixedly connected to the lower stationary ring seat 1; the upper movable ring 104 contacts the upper stationary ring 102, and the lower movable ring 103 contacts the lower stationary ring 101, and a booster assembly is provided between the upper movable ring 104 and the lower movable ring 103.
[0041] The booster assembly includes a spring seat 108, an upper push ring 105 and a lower push ring 106. The spring seat 108 is fixedly connected to the sleeve 2. Several springs 107 installed on the spring seat 108 are arranged between the upper push ring 105 and the lower push ring 106. The upper push ring 105 is transmission connected to the upper movable ring 104, and the lower push ring 106 is transmission connected to the lower movable ring 103.
[0042] In one embodiment, the transmission connection is a transmission of tenons and grooves. Specifically, several recesses R on the upper and lower moving rings correspond one-to-one through several convex R on the push ring to achieve transmission, and the convex R is a protrusion and the concave R is a groove.
[0043] In one embodiment, a bearing seat 9 is connected to the upper part of the upper stationary ring seat 4, and the bearing seat 9 is fixedly installed on the equipment kettle body through screws with the upper stationary ring seat, the sealing cavity and the lower stationary ring seat. Two groups of bearings 6 mounted on the shaft sleeve are arranged inside the bearing seat 9, and the gap between the two bearings is adjustable, wherein a bearing lock nut 11 mounted on the shaft sleeve is arranged above the upper bearing;
[0044] A grease injection port for injecting grease into the bearing is provided on the bearing seat, and an oil cup is installed on the grease injection port.
[0045] In order to facilitate the hoisting of the integral kettle mechanical seal assembly, in one embodiment, two symmetrically arranged roller assemblies 200 are fixedly mounted on the bearing seat 9. The roller assembly 200 includes a roller shaft 201 and a roller 202. The roller shaft 201 is connected to the bearing seat 9 through a thread, and the roller 202 is mounted on the roller shaft 201 through a needle bearing 203. A closed cavity for accommodating the needle bearing is formed between the roller shaft 201 and the roller 202; a lubrication hole 205 is opened on the roller shaft and communicated with the sealing cavity for injecting lubricating oil into the sealing cavity, and a plug 206 is provided at the inlet end of the lubrication hole.
[0046] Specifically, when the mechanical seal assembly for the hydration reactor is used, the mechanical seal is first installed between the lower stationary ring seat 1 , the sealing cavity 3 , and the upper stationary ring seat 4 . The upper and lower static rings are sealed with the upper and lower static ring seats through the bottom O-ring and the radial O-ring respectively. In addition to the bottom sealing, the bottom O-ring can mainly play a vibration reduction role and balance the uneven installation of the bottom of the static ring; the anti-rotation pins on the upper and lower static ring seats are used to prevent rotation, and the clamping ring 109 is fixed to the upper and lower static ring seats with several screws 1 to achieve anti-reverse pressure; the several concave Rs on the upper and lower dynamic rings correspond one-to-one with the several convex Rs on the push ring to achieve transmission, and the upper and lower push rings correspond one-to-one with the several pin holes of the spring seat 108 through the several transmission pins 110 at the bottom to achieve transmission. The spring seat 108 is fastened to the shaft sleeve 2 through several set screws and rotates with the shaft. There are several independent springs 107 between the spring seat 108 and the push ring. After compression, the spring force generated pushes the upper and lower dynamic rings to fit tightly with the upper and lower static rings, thereby achieving end face sealing. There are O-rings between the dynamic ring and the spring seat, and between the spring seat and the shaft sleeve to achieve sealing. The lower stationary ring seat 1 is provided with a sealing liquid inlet, and the upper stationary ring seat 4 is provided with a sealing liquid outlet, so that the sealing liquid can enter from a low position and exit from a high position. The circulation of the sealing liquid can provide good lubrication and heat dissipation for the mechanical seal, thus achieving long-term operation of the mechanical seal. At the same time, a leakage observation hole is provided behind the upper stationary ring of the upper stationary ring seat 4, so as to facilitate the determination of the operation of the mechanical seal during on-site use. Once the leakage of the sealing liquid is observed in the observation hole, it indicates that the upper mechanical seal is abnormal, thus providing accurate data for operation and maintenance and reserving maintenance time.
[0047] The bearing 6 is installed inside the bearing seat 9. The clearance between the two bearings 6 is adjusted by the inner and outer washers 7 and 8. The bearing 6 is locked on the sleeve 2 by the bearing lock nut 11. The bearing lock nut 11 is fixed to the sleeve 2 by the screw 3 and the stop washer to prevent the bearing 6 from loosening. At both ends of the bearing 6, a skeleton oil seal 5 is installed on the upper static ring seat 4 and the bearing seat 9 to prevent the leakage of the grease filled in the bearing 6. A grease injection hole is opened on the bearing seat 9, and an oil cup is installed to realize online real-time grease filling. An O-ring is installed between the sleeve 2 and the equipment shaft to achieve sealing, and a key to achieve transmission.
[0048] The lower stationary ring seat 1 is connected to the sealing cavity 3 as a whole through several screws 2, and the bearing seat 9 and the upper stationary ring seat 4 are connected to the sealing cavity 3 as a whole through several screws 4. The entire kettle mechanical seal assembly is installed on the top of the kettle, sealed by an O-ring, fixed to the kettle body by several studs and nuts installed on site, and the shaft sleeve is fixed to the equipment shaft by a shaft end locking nut.
[0049] Two symmetrical groups of rollers are designed on the outer circle of the bearing seat 9 to realize the hoisting of the mechanical seal assembly for the whole kettle. The roller assembly is connected to the bearing seat 9 by the thread on the roller shaft, and a roller is installed on the roller shaft. A needle bearing is installed between the roller and the roller shaft. A lubrication hole is designed on the roller shaft to communicate with the needle bearing, and the inlet is sealed with a plug to achieve online grease injection, keep the roller lubricated, and prevent rust; a retaining ring is designed on the outside of the roller. After the roller assembly is installed on the assembly, the retaining ring is welded according to the design size to ensure that the size of the roller assembly is consistent with the size of the kettle seal installation bracket on site, so as to ensure the smooth installation of the kettle seal assembly.
[0050] The mechanical seal assembly for the hydration reaction kettle of the utility model is easy to install and reliable to use, reduces the maintenance frequency and on-site environmental pollution, increases the service life of the equipment, and ensures smooth production.
[0051] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A mechanical seal assembly for a hydration reactor, characterized in that: A lower stationary ring seat, a sealing cavity and an upper stationary ring seat installed on the kettle body are arranged in sequence on the top of the kettle body, a mechanical seal located between the upper stationary ring seat and the lower stationary ring seat is installed in the sealing cavity through a shaft sleeve, and the shaft sleeve is fixedly installed on the equipment shaft; A sealing liquid inlet connected to the interior of the sealing cavity is provided on the lower stationary ring seat, and a sealing liquid outlet connected to the interior of the sealing cavity is provided on the upper stationary ring seat. The sealing liquid enters the sealing cavity from the lower sealing liquid inlet and is discharged from the higher sealing liquid outlet.
2. The mechanical seal assembly for a hydration reactor kettle according to claim 1, characterized in that: The mechanical seal includes an upper static ring, an upper dynamic ring, a lower dynamic ring and a lower static ring from top to bottom. The upper static ring is fixedly connected to the upper static ring seat, and the lower static ring is fixedly connected to the lower static ring seat; The upper moving ring contacts the upper static ring, the lower moving ring contacts the lower static ring, and a boosting assembly is arranged between the upper moving ring and the lower moving ring.
3. The mechanical seal assembly for a hydration reactor kettle according to claim 2, characterized in that: The booster assembly comprises a spring seat, an upper push ring and a lower push ring, wherein the spring seat is fixedly connected to the shaft sleeve, and a plurality of springs installed on the spring seat are arranged between the upper push ring and the lower push ring; The upper push ring is transmission connected to the upper movable ring, and the lower push ring is transmission connected to the lower movable ring.
4. The mechanical seal assembly for a hydration reactor kettle according to claim 3, characterized in that: The transmission connection is a transmission in which a tenon and a groove cooperate.
5. A mechanical seal assembly for a hydration reactor according to any one of claims 1 to 4, characterized in that: A bearing seat is connected to the upper part of the upper stationary ring seat, and the bearing seat is fixedly installed on the kettle body through screws with the upper stationary ring seat, the sealing cavity and the lower stationary ring seat. Two groups of bearings mounted on the shaft sleeve are arranged inside the bearing seat, and the gap between the two bearings is adjustable. A bearing lock nut mounted on the shaft sleeve is arranged above the upper bearing; A grease injection port for injecting grease into the bearing is provided on the bearing seat, and an oil cup is installed on the grease injection port.
6. The mechanical seal assembly for a hydration reactor kettle according to claim 5, characterized in that: Two symmetrically arranged roller assemblies are fixedly mounted on the bearing seat.
7. The mechanical seal assembly for a hydration reactor kettle according to claim 6, characterized in that: The roller assembly comprises a roller shaft and a roller. The roller shaft is connected to the bearing seat via a thread, and the roller is mounted on the roller shaft via a needle bearing.
8. The mechanical seal assembly for a hydration reactor kettle according to claim 7, characterized in that: A closed cavity for accommodating the needle bearing is formed between the roller shaft and the roller; A lubrication hole connected with the sealing cavity and used for injecting lubricating oil into the sealing cavity is opened on the roller shaft, and a plug is arranged at the inlet end of the lubrication hole.