CN113669456B - Sealing device for preventing microwave leakage of rubber desulfurization stirring mechanism - Google Patents
Sealing device for preventing microwave leakage of rubber desulfurization stirring mechanism Download PDFInfo
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- CN113669456B CN113669456B CN202111136847.9A CN202111136847A CN113669456B CN 113669456 B CN113669456 B CN 113669456B CN 202111136847 A CN202111136847 A CN 202111136847A CN 113669456 B CN113669456 B CN 113669456B
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- box body
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- 238000007789 sealing Methods 0.000 title claims abstract description 97
- 238000003756 stirring Methods 0.000 title claims abstract description 73
- 229920001971 elastomer Polymers 0.000 title claims abstract description 55
- 230000007246 mechanism Effects 0.000 title claims abstract description 17
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 12
- 230000023556 desulfurization Effects 0.000 title claims abstract description 12
- 238000006243 chemical reaction Methods 0.000 claims abstract description 17
- 230000009471 action Effects 0.000 claims abstract description 6
- 239000007789 gas Substances 0.000 claims description 77
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 28
- 239000000843 powder Substances 0.000 claims description 16
- 229910052757 nitrogen Inorganic materials 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 7
- 239000003381 stabilizer Substances 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 6
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 6
- 230000001050 lubricating effect Effects 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 230000008602 contraction Effects 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims description 2
- 239000003921 oil Substances 0.000 description 7
- 239000002184 metal Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000010815 organic waste Substances 0.000 description 5
- 230000005855 radiation Effects 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 239000002912 waste gas Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000004880 explosion Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000004519 grease Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000010907 mechanical stirring Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3268—Mounting of sealing rings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/723—Shaft end sealing means, e.g. cup-shaped caps or covers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3296—Arrangements for monitoring the condition or operation of elastic sealings; Arrangements for control of elastic sealings, e.g. of their geometry or stiffness
Abstract
The invention discloses a sealing device for preventing microwave leakage of a rubber desulfurization stirring mechanism, which belongs to the technical field of mechanical sealing, and comprises a shell and a bearing end cover, wherein the shell and the bearing end cover are arranged at the end part of a stirring shaft; the inside of the box body is provided with a microwave conversion device, and the outside is provided with a microwave generator and a control module. The end part of the stirring shaft is plugged through the bearing end cover and the shell, high-pressure gas is filled into the box body through the high-pressure gas connector, the microwave conversion device detects microwave signals and transmits the signals to the control module, the control module controls the action of the microwave automatic adjusting sealing structure, and the sealing of the end part of the stirring shaft is realized through the air pressure automatic adjusting sealing structure, so that the leakage of microwaves and high-pressure gas in the box body is prevented.
Description
Technical Field
The invention belongs to the technical field of mechanical sealing, and particularly relates to a sealing device for preventing microwave leakage of a rubber desulfurization stirring mechanism.
Background
In the rubber desulfurization process, rubber powder needs to be fully stirred, and the traditional material stirring mode is mechanical stirring. In order to improve the material stirring efficiency, the material stirring is more uniform, a mode of combining mechanical stirring and high-pressure gas stirring is adopted, the rubber powder is subjected to microwave desulfurization in the stirring process, high-pressure gas is also required to be input into the stirring mechanism through the sealing device, in the actual working process, the pressure of the high-pressure gas possibly changes along with time, and the common rubber sealing cannot meet the function. It is therefore desirable to design a sealing device that automatically adjusts the mechanical gas stirring mechanism to prevent microwave leakage.
At present, the sealing rotary joint provided by the technical scheme of the patent number CN201020127807.9 in the prior art does not consider the sealing between the rotary mandrel and the joint body, and the deep groove ball bearing lacks a structure for periodically injecting grease, so that hydraulic oil is easy to leak after long-time use, and normal operation of equipment cannot be guaranteed.
The technical scheme of the patent number CN201620810200.8 provides a high-pressure rotary joint, does not have the effect of automatically regulated to compress tightly the seal along with pressure variation, under the too high condition of pressure, can not guarantee sealed compactness.
In summary, the existing products on the market have different design defects, and the design of the product aims to solve the problems.
Disclosure of Invention
The invention aims to provide a sealing device for preventing microwave leakage of a rubber desulfurization stirring mechanism, which aims to solve the technical problem that the stirring mechanism in the prior art has poor sealing performance in a high-pressure environment, can realize strict sealing between high-pressure gas and a rotating shaft, and has the functions of automatically adjusting and pressing sealing along with the change of the intensity of microwaves and the pressure of the gas, preventing the leakage of microwaves and the high-pressure gas in a box body and the like.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides a sealing device for rubber desulfurization rabbling mechanism prevents microwave leakage, includes casing and bearing end cover that sets up in the (mixing) shaft tip, the casing both sides link to each other with the lateral wall of bearing end cover and box respectively, the tip of (mixing) shaft runs through the casing, the terminal spindle nose of (mixing) shaft sets up in the inner chamber that encloses after bearing end cover links to each other with the casing, be equipped with high-pressure gas joint on the lateral wall of casing for let in high-pressure gas in casing and the box, the tip of (mixing) shaft is equipped with the microwave automatically regulated seal structure and the automatic seal structure of air pressure that link to each other with the casing; the inside of the box body is provided with a microwave conversion device, the outside is provided with a microwave generator and a control module, and the microwave conversion device controls the action of the microwave automatic adjusting sealing structure through the control module.
Preferably, the shaft head is a solid shaft, the stirring shaft is a hollow shaft, a plurality of vent holes communicated with an inner hole of the hollow shaft are radially formed in the end part of the hollow shaft, an air inlet hole capable of being communicated with the vent holes is radially formed in the side wall of the shell, and the high-pressure gas connector is arranged at the air inlet end of the air inlet hole; the middle part of the shell is in sealing fit with the hollow shaft, and a plurality of O-shaped rubber rings are arranged on the fit surface of the shell and the hollow shaft and are used for sealing a gap between the shell and the hollow shaft; o-shaped rubber rings are arranged on two sides of the air inlet hole.
Preferably, the microwave automatic adjusting sealing structure comprises a sealing ring, a left clamping ring and a right clamping ring, wherein the sealing ring is used for tightly holding the hollow shaft, the left clamping ring and the right clamping ring are arranged outside the sealing ring, the upper end and the lower end of the left clamping ring are fixedly connected with the shell, the upper end of the right clamping ring is fixedly connected with the shell, the lower end of the right clamping ring is fixed at the tail end of the ejector rod, the other end of the ejector rod is connected with a cam, the cam is driven by a steering engine, the steering engine is fixed on a fixed plate, and the fixed plate is arranged in a groove at the inner side of the shell; the steering engine is controlled by a control module outside the shell, and the right clamping ring is driven to be close to the left clamping ring through the ejector rod, so that the sealing ring is clamped.
Preferably, the microwave conversion device transmits microwave signals to the control module through a first lead wire, and the control module pumps the electric signals to the steering engine through a second lead wire; the microwave conversion device comprises a measuring antenna, a detection circuit, a low-pass filter, an amplifier and an analog-to-digital converter.
Preferably, the automatic air pressure adjusting and sealing structure comprises a sealing ring for tightly holding the hollow shaft, a left enveloping ring and a right enveloping ring, wherein the left enveloping ring and the right enveloping ring are arranged outside the sealing ring, the upper ends of the left enveloping ring and the right enveloping ring are fixed on the shell, the lower ends of the left enveloping ring and the right enveloping ring are respectively connected with two ends of the air cylinder, and the lower end of the left enveloping ring and the left end of the air cylinder are fixedly connected on the shell; the side wall of the shell is provided with an air passage for the air tube of the air cylinder to pass through; the bottom of the shell is provided with a supercharger connected with the air cylinder.
Preferably, the booster conveys high-pressure gas to the cylinder through a gas pipeline penetrating through the gas path channel, and the left enveloping ring and the right enveloping ring are clamped through the shrinkage of the cylinder, so that the sealing ring is clamped.
Preferably, the inner diameters of the two ends of the supercharger are different, a duplex piston is arranged in the supercharger and comprises a connecting rod, a large piston and a small piston, the large piston and the small piston are respectively fixed at the two ends of the connecting rod, and the large piston and the small piston are respectively matched with the inner diameters of the two ends of the supercharger; according to the stress balance of the two ends of the large piston and the small piston in the supercharger, the supercharging ratio of the supercharger is calculated。
Preferably, the booster is connected with the air cylinder through an electromagnetic valve, the booster is used for amplifying the air pressure in the box body, the air pressure is transmitted to the air cylinder through an air pipeline, and the left enveloping ring and the right enveloping ring automatically clamp the sealing ring through the expansion and the contraction of the air cylinder.
Preferably, the shaft head is in running fit with the shell through a bearing, the tail end of the shaft head is in sealing fit with a bearing end cover through a sealing assembly, an adjusting gasket is arranged between the matching surfaces of the bearing end cover and the shell, and the periphery of the bearing end cover and the periphery of the shell are connected through a plurality of bolts; the side wall of the shell is provided with an oil filling hole, and an oil cup is arranged in the oil filling hole and used for lubricating the bearing.
Preferably, the seal assembly comprises a sleeve and a rubber ring, the sleeve is sleeved on the outer circle of the shaft head, the outer wall of the sleeve is waist-shaped matched with the rubber ring, and the inner wall of the bearing end cover is provided with an inner conical surface for extruding the rubber ring.
Preferably, the rubber powder in the box body is stirred by adopting blades, microwave stirring and high-pressure gas stirring, the blades are stirred by fixing a round tube on a hollow blade, one end of the round tube is connected with the hollow shaft through threads, and the hollow shaft rotates to drive the blade to realize blade stirring; stirring by microwaves emitted by a microwave generator; the high-pressure gas stirring is to introduce high-pressure gas into the box body through a high-pressure gas connector, introduce the high-pressure gas into the hollow shaft through a vent hole on the hollow shaft, introduce the high-pressure gas into the hollow blade through the circular tube, and spray the high-pressure gas through a nozzle at the bottom of the hollow blade to realize stirring of rubber powder in the box body; the high-pressure gas is nitrogen, and a gas stabilizer is arranged outside the box body and used for enabling the pressure of the gas in the hollow shaft to be 1.9 times of the pressure in the box body.
The beneficial effects of adopting above-mentioned technical scheme to produce lie in: compared with the prior art, the stirring shaft end is plugged through the bearing end cover and the shell, high-pressure gas is filled into the box body through the high-pressure gas connector on the side wall of the shell, a microwave signal is detected through the microwave conversion device in the box body and is transmitted to the external control module, the action of the microwave automatic adjusting sealing structure is controlled through the control module, and then the sealing of the stirring shaft end is realized through the air pressure automatic adjusting sealing structure. The invention can automatically adjust the end part of the compressing and sealing stirring shaft along with the change of the microwave intensity and the gas pressure, and prevent the leakage of the microwave and the high-pressure gas in the box body; through the linkage of the voltage stabilizer and the nitrogen flow electromagnetic valve, the self-adaptive adjustment of the nitrogen input flow in the box body is realized, so that the flow of nitrogen reaches the supercritical fluid state, and the optimal effect on stirring the rubber powder is achieved; meanwhile, the microwave radiation intensity of the gap leakage at the end part of the stirring shaft is monitored in real time by utilizing the microwave leakage detector, so that the organic waste gas in the box body is prevented from leaking from the supporting part of the stirring shaft, explosion is caused, and the safety coefficient of equipment is improved.
Drawings
The invention will be described in further detail with reference to the drawings and the detailed description.
FIG. 1 is a schematic structural view of a sealing device for preventing microwave leakage of a rubber desulfurization stirring mechanism according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the connection of a housing to a case according to an embodiment of the present invention;
FIG. 3 is a section A-A of the hollow mandrel of FIG. 1;
FIG. 4 is a view in the direction B of FIG. 1;
FIG. 5 is an enlarged view of a portion of FIG. 4 at I;
FIG. 6 is a schematic view of a partial arrangement of a microwave automatic adjusting seal structure and an air pressure automatic adjusting seal structure at the bottom of a groove of a housing in an embodiment of the present invention;
FIG. 7 is a schematic view of the structure principle of the microwave automatic adjusting seal structure in the embodiment of the invention;
FIG. 8 is a schematic view of the structure of the automatic air pressure adjusting seal structure according to the embodiment of the invention;
FIG. 9 is a schematic view of the structural principle of a cylinder in an embodiment of the present invention;
FIG. 10 is a schematic view of the construction principle of a supercharger in an embodiment of the present invention;
FIG. 11 is a schematic view of the installation of a supercharger outside a housing in an embodiment of the present invention;
FIG. 12 is a control schematic diagram of a microwave automatically tuned seal configuration in an embodiment of the invention;
FIG. 13 is a control schematic diagram of an automatic air pressure regulating seal structure in an embodiment of the invention;
FIG. 14 is a schematic diagram of a voltage regulator in an embodiment of the invention;
in the figure: 1. bearing end cover, 2, spindle nose, 3, sleeve, 4, rubber ring, 5, bearing, 6, adjusting gasket, 7, shell, 8, oil cup, 9, high-pressure gas joint, 10, metal gasket, 11, stirring shaft, 12, O-shaped rubber ring, 13, lead, 14, gas pipeline, 15, booster, 16, microwave automatic adjusting sealing structure, 17, air pressure automatic adjusting sealing structure, 18, sealing ring, 19, left clamping ring, 20, right clamping ring, 21, ejector rod, 22, cam, 23, fixed plate, 24, steering engine, 25, right enveloping ring, 26, cylinder, 27, left enveloping ring, 28, control module, 29, lead, 30, microwave conversion device, 31, box, 32, round tube, 33, hollow blade, 34, microwave generator; 35-vent holes, 36-grooves, 37-air passage channels, 38-voltage stabilizer, 39-floating piston.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 and 2, the sealing device for preventing microwave leakage of a rubber desulfurization stirring mechanism provided by the invention comprises a shell 7 and a bearing end cover 1, wherein the shell 7 and the bearing end cover 1 are arranged at the end part of a stirring shaft 11, two sides of the shell 7 are respectively connected with the bearing end cover 1 and the side wall of a box 31, the end part of the stirring shaft 11 penetrates through the shell 7, a terminal shaft head 2 of the stirring shaft 11 is arranged in an inner cavity enclosed by the bearing end cover 1 and the shell 7 after being connected, a high-pressure gas joint 9 is arranged on the side wall of the shell 7 and is used for introducing high-pressure gas into the shell 7 and the box 31, and the end part of the stirring shaft 11 is provided with a microwave automatic adjusting sealing structure 16 and a gas pressure automatic adjusting sealing structure 17 which are connected with the shell 7; the inside of the box body 31 is provided with a microwave conversion device 30, the outside is provided with a microwave generator 34 and a control module 28, the microwave conversion device 30 controls the action of the microwave automatic adjusting sealing structure 16 through the control module 28, the automatic air pressure adjusting sealing is realized, and the high-pressure gas and microwaves in the box body are prevented from being leaked.
In one embodiment of the present invention, as shown in fig. 1, the shaft head 2 is a solid shaft, the stirring shaft 11 is a hollow shaft, the solid shaft is connected to the hollow shaft through threads, and a metal gasket 10 is installed in the middle of the solid shaft, so as to ensure the connection rigidity of the solid shaft and the hollow shaft; the end part of the hollow shaft is radially provided with a plurality of vent holes 35 communicated with the inner holes of the hollow shaft, and 4 vent holes 35 are radially arranged in the embodiment of fig. 3; the side wall of the shell 7 is radially provided with an air inlet hole which can be communicated with the air vent 35, and the high-pressure gas connector 9 is arranged at the air inlet end of the air inlet hole; the middle part of the shell 7 is in sealing fit with the hollow shaft, and a plurality of O-shaped rubber rings 12 are arranged on the fit surface of the shell 7 and the hollow shaft and are used for sealing a gap between the shell 7 and the hollow shaft; the two sides of the air inlet hole are respectively provided with an O-shaped rubber ring 12, and the number of the O-shaped rubber rings in the embodiment is 4.
In one embodiment of the present invention, as shown in fig. 1, 6 and 7, the microwave automatically adjusting sealing structure 16 includes a sealing ring 18 for holding the hollow shaft, a left clamping ring 19 and a right clamping ring 20, the left clamping ring 19 and the right clamping ring 20 are disposed outside the sealing ring 18, the upper and lower ends of the left clamping ring 19 are both fixedly connected with the housing 7, the upper end of the right clamping ring 20 is fixedly connected with the housing 7, the lower end of the right clamping ring 20 is fixed at the end of the ejector rod 21, the other end of the ejector rod 21 is connected with a cam 22, the cam 22 is driven by a steering engine 24, the steering engine 24 is controlled by a control module 28 outside the housing 7, and the steering engine 21 drives the right clamping ring 20 to approach the left clamping ring 19, thereby clamping the sealing ring 18. As shown in fig. 6, the steering engine 24 is fixed on the fixing plate 23, the fixing plate 23 is disposed in a groove 36 on the inner side of the housing 7, the cam 22 is fixed on an output shaft of the steering engine 24, and the cam 22 rotates to drive the ejector rod 21 to move leftwards. The left clamping ring 19 is fixed on the shell and is not moved, the right clamping ring 20 is only connected to the shell 7 through bolts at the upper end, the sealing ring 18 is arranged between the left clamping ring and the right clamping ring, and the ejector rod 21 moves leftwards to tightly push the right clamping ring 20, so that the sealing ring 18 is clamped, and the microwave automatic adjusting and sealing function is realized.
In one embodiment of the present invention, as shown in fig. 2 and 7, a microwave generator 34 is installed at the outside of the tank 31, and microwaves generated by the microwave generator are transmitted into the tank through a waveguide, so that electromagnetic waves with a certain oscillation frequency are generated in the tank, and the microwave is used to stir and heat the rubber powder in the tank to complete desulfurization and activation. The microwave conversion device 30 transmits microwave signals to the control module 28 outside the box 31 through a first lead wire, and the control module 28 pumps the electric signals to the steering engine 24 through a second lead wire. As shown in fig. 12, the microwave conversion apparatus includes a measurement antenna, a detection circuit, a low-pass filter, an amplifier, and an analog-to-digital converter.
The specific working process is as follows:
the rubber powder in the box body adopts a microwave stirring mode, the microwave conversion device firstly receives electromagnetic wave signals through the measuring antenna, then carries out detection through the detection circuit, and carries out filtering through the low-pass filter, because the signals received by the measuring antenna are weak, the signals need to be amplified through the amplifying circuit, and finally the signals processed by the amplifying circuit are converted into digital signals through the analog-to-digital converter; and then the digital signal is sent into a control module, the control module outputs a control signal to control the rotation angle of the steering engine, the steering engine rotates and drives the cam to rotate, so that the ejector rod and the right clamping ring are driven to move to push against the left clamping ring, the left clamping ring and the right clamping ring are continuously clamped, and the microwave automatic adjusting and sealing function is realized.
In one embodiment of the present invention, as shown in fig. 1, 2, 4, 5, 6, 8 and 9, the automatic air pressure adjusting and sealing structure comprises a sealing ring 18 for tightly holding a hollow shaft, a left enveloping ring 27 and a right enveloping ring 25, wherein the left enveloping ring 27 and the right enveloping ring 25 are arranged outside the sealing ring 18, the upper ends of the left enveloping ring 27 and the right enveloping ring 25 are fixed on the shell 7, the lower ends of the left enveloping ring 27 and the right enveloping ring 25 are respectively connected with two ends of the air cylinder 26, and the lower end of the left enveloping ring 27 and the left end of the air cylinder 26 are fixedly connected on the shell 7; the side wall of the shell 7 is provided with an air passage 37 for the air pipe of the air cylinder 26 to pass through; the outer bottom of the housing 7 is provided with a supercharger 15 connected to a cylinder 26, as shown in fig. 1, 2 and 11. As shown in fig. 1 and 5, the booster 15 delivers high-pressure gas to the cylinder 26 through a gas pipeline penetrating through the gas channel 37, and the left envelope ring 27 and the right envelope ring 25 are clamped by the shrinkage of the cylinder 26, so as to clamp the sealing ring 18, seal the edge of the contact end of the hollow shaft and the shell, and prevent the leakage of the high-pressure gas and microwaves along the matching surface between the hollow shaft and the shell.
In particular, as shown in FIG. 10, wherein the inner diameters of the two ends of the supercharger 15 are different, a duplex piston is arranged in the supercharger 15, the duplex piston comprises a connecting rod 150, a large piston 151 and a small piston 152, the large piston 151 and the small piston 152 are respectively fixed at the two ends of the connecting rod 150, and the large piston 151 and the small piston 152 are respectively matched with the inner diameters of the two ends of the supercharger 15; according to the stress balance of the two ends of the large piston and the small piston in the supercharger, the supercharging ratio of the supercharger is calculatedSupercharging ratio->The calculation process of (2) is as follows:
wherein:: supercharger input pressure, +.>: supercharger output pressure
: input lumen diameter, < >>: diameter of output cavity
Supercharging ratioFor outputting pressure +.>Is +.>Ratio of:
in a specific application process, the booster 15 is connected with the air cylinder 26 through an electromagnetic valve, and in consideration of low pressure of high-pressure air in the box body, the booster 15 is used for amplifying the pressure of the air in the box body 31, the air is conveyed to the air cylinder 26 through an air pipeline, the left enveloping ring 27 and the right enveloping ring 25 are used for automatically clamping the sealing ring 18 through the air cylinder 26, the edge of the contact end of the hollow shaft and the shell is further sealed, and leakage of the high-pressure air and microwaves along the matching surface between the hollow shaft and the shell is avoided. The pressure sensor is arranged in the box body, so that the internal pressure of the box body can be detected on line, and the pressure sensor and the electromagnetic valve can be connected with an external control module to realize automatic control of the air cylinder. As shown in fig. 13, the principle of operation is as follows:
when the air pressure in the box body is low, the pressure sensor sends a low-pressure signal to the control module, the control module controls the first electromagnetic valve and the supercharger to be started, the low-pressure air is pressurized by the supercharger and then is conveyed to the air cylinder, and the piston of the air cylinder is driven to move; when the internal air pressure of the box body is higher, the pressure sensor sends a high-pressure signal to the control module, the control module controls the first electromagnetic valve to be closed, and the second electromagnetic valve is opened at the same time, so that the air cylinder is directly driven by the gas in the box body. By utilizing the structure, the automatic control of the air cylinder can be realized, and the air in the box body is used as an air source of the air cylinder, so that the air source is not required to be additionally provided.
As shown in fig. 1, in the concrete assembly, the shaft head 2 is in running fit with the shell 7 through the bearing 5, the tail end of the shaft head 2 is in sealing fit with the bearing end cover 1 through a sealing assembly, an adjusting gasket 6 is arranged between the matching surfaces of the bearing end cover 1 and the shell 7, and the adjusting gasket 6 is used for adjusting the clearance of the bearing 5; the periphery of the bearing end cover 1 is connected with the periphery of the shell 7 through a plurality of bolts; the side wall of the shell 7 is provided with an oil filling hole, an oil cup 8 is arranged in the oil filling hole and used for periodically injecting bearing lubricating grease, a lubricating oil way is arranged in the shell 7, and the lubricating grease flows into the bearing 5 through the lubricating oil way, so that the bearing 5 is lubricated. The sealing assembly comprises a sleeve 3 and a rubber ring 4, the sleeve 3 is sleeved on the outer circle of the shaft head 2, the outer wall of the sleeve 3 is waist-shaped matched with the rubber ring 4, and the inner wall of the bearing end cover 1 is provided with an inner conical surface for extruding the rubber ring 4. The bearing end cover 1 presses the rubber ring 4 on the sleeve 3, the right side of the sleeve 3 presses the left side of the inner ring of the bearing 5, and the bearing end cover 1 presses the left side of the outer ring of the bearing 5, so that the rubber ring 4 and the sleeve 3 form a left seal of the bearing 5; the leftmost O-shaped rubber ring 12 forms the right seal of the bearing 5, so that the left side and the right side of the bearing are sealed, and meanwhile, the O-shaped rubber ring 12 is also used for sealing a gap between the shell 7 and the hollow shaft, so that leakage of high-pressure gas is prevented; the right side of the inner ring of the bearing 5 is positioned by the collar, so that the axial positioning of the bearing 5 is realized.
In the concrete manufacturing process, the sealing ring and the O-shaped rubber ring are made of silicon rubber; the shell is processed by adopting a casting process, so that batch processing is convenient.
Wherein, the rubber powder in the box 31 is stirred by adopting blades, microwave stirring and high-pressure gas stirring, the blades are stirred by fixing a round tube 32 on a hollow blade 33, one end of the round tube 32 is connected with the hollow shaft through threads, and the hollow shaft rotates to drive the hollow blade 33 to realize the blades stirring; the microwave stirring is carried out by the microwaves emitted by the microwave generator 34; the high-pressure gas stirring is to introduce high-pressure gas into the box body through a high-pressure gas connector 9, introduce the high-pressure gas into the hollow shaft through a vent hole 35 on the hollow shaft, introduce the high-pressure gas into the hollow blade 33 through the circular tube 32, and spray the high-pressure gas through a nozzle at the bottom of the hollow blade 33 to realize stirring of the rubber powder in the box body; the high-pressure gas is nitrogen, and a gas stabilizer is arranged outside the box body and used for enabling the pressure of the gas in the hollow shaft to be 1.9 times of the pressure in the box body.
In a specific design, the nozzle at the tail end of the hollow blade is a shrinkage nozzle and is used for converting the pressure energy of nitrogen into kinetic energy so as to play a role in stirring rubber powder. As shown in fig. 14, a floating piston 39 is arranged in the pressure stabilizer 38, and inner cavities at two ends of the floating piston are respectively communicated with the hollow shaft and the inside of the box body; the displacement sensor and the flow electromagnetic valve are connected with the control module, and when the floating piston moves leftwards, the opening of the flow electromagnetic valve is enlarged; when the floating piston moves right, the opening of the flow electromagnetic valve is reduced, and linkage between the floating piston and the flow electromagnetic valve is realized. The gas pressure in the box is P1, the gas pressure in the hollow shaft is P2, when P2= 1.9P1, the position of the floating piston is unchanged, the floating piston is in an equilibrium state, the nitrogen input flow is unchanged, the flow of the nitrogen reaches a supercritical fluid state, the flow velocity at the outlet of the nozzle reaches the sound velocity, and the stirring of the rubber powder is achieved to the best effect.
As the temperature of the rubber powder increases as production proceeds, the generated exhaust gas becomes more and possibly less than the exhaust gas discharged through the exhaust port, the gas pressure P1 in the cavity becomes greater, resulting in P2 being less than 1.9P1, the opening of the flow valve becomes greater when the floating piston moves left, the nitrogen inlet flow becomes greater, the gas pressure P2 in the hollow shaft becomes greater until p2= 1.9P1, and a new equilibrium state is reached.
In addition, when the sealing device is aged or fails due to other reasons, the microwaves in the box body can leak, and the microwaves pass through the metal gap at the end part of the stirring shaft, so that a sparking phenomenon can be generated; if the organic waste gas in the box body leaks through the gap, the organic waste gas and air are mixed to form premixed gas, and the premixed gas encounters metal ignition and can explode. Therefore, a safety protection device is arranged at the matching position of the stirring shaft and the box body, and the safety protection device is a microwave leakage detector arranged at the supporting position of the end part of the stirring shaft and is used for monitoring the microwave radiation intensity leaked at the supporting position of the stirring shaft in real time. When the intensity of microwave radiation is less than 50 mu W/cm < 2 >, the metal is not ignited for a safe range, and the waste gas in the box body is naturally discharged to the waste gas collecting device through the exhaust port.
When the microwave radiation intensity of the leakage of the stirring shaft support is greater than 50 mu W/cm < 2 >, metal ignition can be possibly caused, the air pump of the waste gas collecting device is required to be turned on, waste gas in the box body is forcibly pumped out, the gas pressure in the box body is ensured not to be greater than 0.1Mpa, the organic waste gas is ensured not to leak from the stirring shaft support, and explosion is avoided.
In conclusion, the invention has the advantages of high sealing performance, good rubber powder stirring effect and high safety coefficient, the control module controls the action of the microwave automatic adjusting sealing structure, and the air pressure automatic adjusting sealing structure is used for sealing the end part of the stirring shaft, so that the end part of the stirring shaft can be automatically adjusted and pressed along with the change of the microwave intensity and the nitrogen pressure, and the leakage of microwaves and high-pressure air in the box body is prevented. Through the linkage of the voltage stabilizer and the flow electromagnetic valve for controlling the nitrogen input flow, the self-adaptive adjustment of the nitrogen input flow in the box body is realized, the flow of nitrogen reaches the supercritical fluid state, and the optimal effect on stirring the rubber powder is achieved. Meanwhile, the microwave radiation intensity of the gap leakage at the end part of the stirring shaft is monitored in real time by utilizing the microwave leakage detector, so that the organic waste gas in the box body is prevented from leaking from the supporting part of the stirring shaft, explosion is caused, and the safety coefficient of equipment is improved.
In the foregoing description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present invention is not limited to the specific embodiments disclosed above.
Claims (6)
1. A sealing device that is used for rubber desulfurization rabbling mechanism to prevent microwave leakage, its characterized in that: the stirring shaft comprises a shell and a bearing end cover, wherein the shell and the bearing end cover are arranged at the end part of a stirring shaft, two sides of the shell are respectively connected with the bearing end cover and the side wall of a box body, the end part of the stirring shaft penetrates through the shell, a terminal shaft head of the stirring shaft is arranged in an inner cavity enclosed by the bearing end cover and the shell after being connected, a high-pressure gas connector is arranged on the side wall of the shell and is used for introducing high-pressure gas into the shell and the box body, and the end part of the stirring shaft is provided with a microwave automatic adjusting sealing structure and an air pressure automatic adjusting sealing structure which are connected with the shell; the inside of the box body is provided with a microwave conversion device, the outside of the box body is provided with a microwave generator and a control module, and the microwave conversion device controls the action of the microwave automatic adjusting sealing structure through the control module;
the stirring shaft is a hollow shaft, the end part of the hollow shaft is radially provided with a plurality of vent holes communicated with the inner holes of the hollow shaft, the side wall of the shell is radially provided with air inlet holes which can be communicated with the vent holes, and the high-pressure gas connector is arranged at the air inlet end of the air inlet holes; the middle part of the shell is in sealing fit with the hollow shaft, and a plurality of O-shaped rubber rings are arranged on the fit surface of the shell and the hollow shaft and are used for sealing a gap between the shell and the hollow shaft; o-shaped rubber rings are arranged on two sides of the air inlet hole;
the microwave automatic adjusting sealing structure comprises a sealing ring for holding the hollow shaft, a left clamping ring and a right clamping ring, wherein the left clamping ring and the right clamping ring are arranged outside the sealing ring, the upper end and the lower end of the left clamping ring are fixedly connected with the shell, the upper end of the right clamping ring is fixedly connected with the shell, the lower end of the right clamping ring is fixed at the tail end of the ejector rod, the other end of the ejector rod is connected with a cam, the cam is driven by a steering engine, the steering engine is controlled by a control module outside the shell, and the right clamping ring is driven by the ejector rod to be close to the left clamping ring so as to clamp the sealing ring;
the automatic air pressure adjusting and sealing structure comprises a sealing ring, a left enveloping ring and a right enveloping ring, wherein the sealing ring is used for tightly holding the hollow shaft, the left enveloping ring and the right enveloping ring are arranged outside the sealing ring, the upper ends of the left enveloping ring and the right enveloping ring are fixed on the shell, the lower ends of the left enveloping ring and the right enveloping ring are respectively connected with two ends of the air cylinder, and the lower end of the left enveloping ring and the left end of the air cylinder are fixedly connected on the shell; the side wall of the shell is provided with an air passage for the air tube of the air cylinder to pass through; the bottom of the shell is provided with a supercharger connected with the air cylinder, the supercharger conveys high-pressure air to the air cylinder through an air pipeline penetrating through the air passage, and the left envelope ring and the right envelope ring are clamped by the air cylinder in a shrinkage manner, so that the sealing ring is clamped;
the microwave conversion device transmits microwave signals to the control module through a first lead wire, and the control module pumps the electric signals to the steering engine through a second lead wire; the microwave conversion device comprises a measuring antenna, a detection circuit, a low-pass filter, an amplifier and an analog-to-digital converter, and the working process is as follows:
firstly, receiving electromagnetic wave signals through a measuring antenna, detecting through a detection circuit, filtering through a low-pass filter, amplifying the signals through an amplifying circuit of an amplifier, and finally converting the signals processed by the amplifying circuit into digital signals through an analog-to-digital converter; and then the digital signal is sent into a control module, the control module outputs a control signal to control the rotation angle of the steering engine, the steering engine rotates and drives the cam to rotate, so that the ejector rod and the right clamping ring are driven to move to push against the left clamping ring, the left clamping ring and the right clamping ring are continuously clamped, and the microwave automatic adjusting and sealing function is realized.
2. The sealing device for preventing microwave leakage of a rubber devulcanization stirring mechanism of claim 1, wherein: the inner diameters of two ends of the supercharger are different, a duplex piston is arranged in the supercharger and comprises a connecting rod, a large piston and a small piston, the large piston and the small piston are respectively fixed at two ends of the connecting rod, and the large piston and the small piston are respectively matched with the inner diameters of two ends of the supercharger; according to the stress balance of the two ends of the large piston and the small piston in the supercharger, the supercharging ratio of the supercharger is calculated。
3. The sealing device for preventing microwave leakage of a rubber devulcanization stirring mechanism of claim 2, wherein: the booster is connected with the air cylinder through the electromagnetic valve, the pressure of air in the box body is amplified through the booster, the air is conveyed to the air cylinder through the air pipeline, and the left enveloping ring and the right enveloping ring automatically clamp the sealing ring through the expansion and the contraction of the air cylinder.
4. The sealing device for preventing microwave leakage of a rubber devulcanization stirring mechanism of claim 1, wherein: the shaft head is in running fit with the shell through a bearing, the tail end of the shaft head is in sealing fit with a bearing end cover through a sealing assembly, an adjusting gasket is arranged between the matching surfaces of the bearing end cover and the shell, and the periphery of the bearing end cover and the periphery of the shell are connected through a plurality of bolts; the side wall of the shell is provided with an oil filling hole, and an oil cup is arranged in the oil filling hole and used for lubricating the bearing.
5. The sealing device for preventing microwave leakage of a rubber devulcanization stirring mechanism as recited in claim 4, wherein: the sealing assembly comprises a sleeve and a rubber ring, the sleeve is sleeved on the outer circle of the shaft head, the outer wall of the sleeve is waist-shaped matched with the rubber ring, and the inner wall of the bearing end cover is provided with an inner conical surface for extruding the rubber ring.
6. The sealing device for preventing microwave leakage of a rubber devulcanization stirring mechanism as recited in any of claims 1-5, wherein: the rubber powder in the box body is stirred by adopting blades, microwaves and high-pressure gas, the blades are stirred by fixing round tubes on the hollow blades, one ends of the round tubes are connected with the hollow shaft through threads, and the hollow shaft rotates to drive the hollow blades to realize the blades; stirring by microwaves emitted by a microwave generator; the high-pressure gas stirring is to introduce high-pressure gas into the box body through a high-pressure gas connector, introduce the high-pressure gas into the hollow shaft through a vent hole on the hollow shaft, introduce the high-pressure gas into the hollow blade through the circular tube, and spray the high-pressure gas through a nozzle at the bottom of the hollow blade to realize stirring of rubber powder in the box body; the high-pressure gas is nitrogen, and a gas stabilizer is arranged outside the box body and used for enabling the pressure of the gas in the hollow shaft to be 1.9 times of the pressure in the box body.
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| CN114984857B (en) * | 2022-06-28 | 2023-09-08 | 华能辛店发电有限公司 | Reaction kettle for preparing waste gas absorption liquid of power plant |
| CN115750604B (en) * | 2022-10-27 | 2024-01-12 | 江苏鼎麒轴承有限公司 | Rolling mill bearing seal assembly |
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