DE102021108463A1 - An internal mixer with a performance-equivalent sealing device - Google Patents

Abstract

The invention discloses an internal mixer with a performance-equivalent sealing device comprising an internal mixing chamber and a performance-equivalent sealing device, the performance-equivalent sealing device comprising a first power sealing mechanism and a second power sealing mechanism, the first power sealing mechanism being installed in the first shaft hole of the inner mixing chamber, the second power sealing mechanism being installed in the second shaft hole the internal mixing chamber is installed. The invention provides an internal mixer with performance-equivalent sealing device, which improves the utilization rate of materials, reduces environmental pollution, improves equipment life, reduces maintenance costs and improves production efficiency, and further reduces energy consumption through the axial reaction force generated by the transmission.

Description

technical field

The invention relates to an internal mixer, in particular an internal mixer with a sealing device of equivalent performance.

State of the art

The rubber industry has a long history, mature technology and a wide range of machinery. The rubber mixing process is essential in the processing of rubber products and is completed by special machines (commonly known as internal mixers). The main purpose of this procedure is to mix all kinds of raw materials evenly according to the formula and process requirements. The problem of material leakage has long existed in the mixing process of the internal mixer, and it mainly occurs at the sealing point between the rotating shaft and the internal mixing chamber. Due to the rotation of the rotary shaft and the inherent properties of rubber, it is difficult to achieve good sealing performance. The existing internal mixer generally uses four bakelite rings or tin bronze rings as seals, which are encased in the four shaft holes of the internal mixing chamber. The elastic force of the spring or the hydraulic pressure is used to press the outer end face so that the inner end face is close to the end face of the rotating shaft, and the leakage path is cut off to achieve the purpose of sealing.

The disadvantage of the defect is that since the rubber is a plastic body when mixed, it can easily flow under pressure, so that it gradually fills the entire sealing mechanism through the gap. Over time, under the action of hardeners and accelerators, it is vulcanized into elastomer, which destroys the sealing effect and causes material leakage. Leaks not only waste raw materials, pollute the environment, endanger the health of employees, but also seriously affect the quality of products. Therefore, it is very important for the rubber processing industry to solve the problem of internal mixer material leakage. Second, the existing sealing method not only makes the accessories vulnerable, but also reduces the service life and production efficiency. And it will make the maintenance cost high. The power consumption will also be relatively high, which is not conducive to energy saving.

content of the invention

In view of the above problems, the present invention provides an internal mixer with an equivalent sealing device in performance.

In order to achieve the above purpose, the invention adopts the following technical solution: An internal mixer with a power-equivalent sealing device comprises an internal mixing chamber and a power-equivalent sealing device, the power-equivalent sealing device comprising a first power sealing mechanism and a second power sealing mechanism, the first power sealing mechanism in the first shaft hole of the inner mixing chamber is installed, wherein the second power sealing mechanism is installed in the second shaft hole of the internal mixing chamber.

Further, the first power sealing mechanism includes a first transmission screw rake, two first threaded outer sleeves, two first threaded inner sleeves, two Y-shaped seal rings, and two seal covers.

The two first threaded inner sleeves are respectively fixed on both sides of the first transmission screw stirring rod, with the first threaded inner sleeve embedded in the first threaded outer sleeve, with two first threaded outer sleeves fixed in the first shaft hole, with the two Y-shaped sealing rings respectively in the first sealing outer stages of the two first Threaded inner sleeves are encased and embedded in the two first threaded outer sleeves, the two seal covers are each encased in the first transmission screw stirring rod, and the two Y-shaped sealing rings respectively press the two first threaded outer sleeves and the two first threaded inner sleeves at the same time.

Further, the second power sealing mechanism includes a second transmission screw rake, two second threaded outer sleeves, two second threaded inner sleeves, two Y-shaped seal rings and two seal covers,

The two second threaded inner sleeves are respectively fixed on both sides of the second transmission screw stirring rod, the two second threaded inner sleeves are embedded in the two second threaded outer sleeves, the two second threaded outer sleeves are fixed in the second shaft hole, the two Y-shaped sealing rings respectively into the second sealing outer stages the two second threaded inner sleeves are coated and embedded in the two second threaded outer sleeves, the two you tion covers are respectively sheathed in the second transmission screw stirring rod, and the two Y-shaped sealing rings simultaneously press the two second threaded outer sleeves and the two second threaded inner sleeves.

Further, the first threaded outer sleeve includes a first sleeve body, wherein the outer diameter of the first sleeve body is larger than that of the first shaft hole, wherein a first female thread is arranged in the first sleeve body opposite to the thread screwing direction of the first threaded inner sleeve, wherein a first oil filling groove is above the axial direction of the first female thread, wherein a first sealing inner step, which fits with the Y-shaped seal ring, is formed above the axial direction of the first oil filling groove, wherein a first positioning step, which is larger than the first shaft hole, is formed below the axial direction of the first sleeve body , wherein the helical pitch and helical direction of the internal thread formed in the first positioning stage are the same as those of the first internal thread, with a first clamping groove mating with the first shaft hole above the axial direction of the first positioning un gsstufe is formed, wherein the first clamping groove is located between the first sleeve body and the first positioning step, wherein a first oil filling hole is arranged between the inner wall of the first oil filling groove and the outer wall of the first sleeve body, wherein the fitting clearance between the first threaded outer sleeve and the first threaded inner sleeve 0 .1-3mm.

Further, the second threaded outer sleeve includes a second sleeve body, wherein the outer diameter of the second sleeve body is larger than that of the second shaft hole, wherein a second female thread is arranged in the second sleeve body opposite to the thread screwing direction of the second threaded inner sleeve, wherein a second oil filling groove is above the axial direction of the second female thread, wherein a second inner seal stage, which fits with the Y-shaped seal ring, is formed above the axial direction of the second oil filling groove, wherein a second positioning stage, which is larger than the second shaft hole, is formed below the axial direction of the second sleeve body , wherein the helical pitch and helical direction of the female thread formed in the second positioning stage are the same as those of the second female thread, wherein a second clamping groove mating with the second shaft hole is above the axial direction of the zw eiten positioning step is formed, wherein the second clamping groove is located between the second sleeve body and the second positioning step, wherein a second oil filling hole is arranged between the inner wall of the second oil filling groove and the outer wall of the second sleeve body, the fitting clearance between the second threaded outer sleeve and the second threaded inner sleeve is 0.1-3 mm.

Further, the center of the first transmission screw stirring rod is provided with a first screw stirring part, and the first screw stirring part is located in the inner mixing chamber, the two sides of the first screw stirring part are provided with a first positioning stage that mates with the first threaded inner sleeve, the outside of the first positioning stage with a first transmission rod is provided.

Further, the middle of the second transmission screw stirring rod is provided with a second screw stirring part, and the second screw stirring part is located in the inner mixing chamber, the two sides of the second screw stirring part are provided with a second positioning stage that mates with the second threaded inner sleeve, the outside of the second positioning stage with a second transmission rod is provided.

Further, the directions of movement of the first power seal mechanism and the second power seal mechanism are opposite, with the threading direction of the first threaded outer sleeve in the first power sealing mechanism being opposite to that of the second threaded outer sleeve in the second power sealing mechanism, with the threading direction of the first threaded inner sleeve in the first power sealing mechanism being that of the second threaded inner sleeve in the second power sealing mechanism is opposite.

Further, the internal mixing chamber includes a main mixing box body and a supply mixing cover, the supply mixing cover being fixed to the main mixing box body, the first shaft hole comprising a first upper shaft hole on the main mixing box body and a first lower shaft hole on the supply mixing cover, the second shaft hole having a second upper shaft hole on the main mixing box body and a second lower shaft hole on the supply mixing cover, the first shaft hole and the second shaft hole being through holes, the first shaft hole and the second shaft hole having the same size and shape, the center of the first shaft hole and the second shaft hole being connected to the internal mixing chamber.

Furthermore, a first external thread is arranged on the first threaded inner sleeve, with a side of the first external thread is provided with a first sealing outer step which mates with the Y-shaped sealing ring, wherein a first fastening inner hole which mates with the first fastening step on the first transmission screw stirring rod is arranged in the first threaded inner sleeve, with a second male thread on the second threaded inner sleeve, one side of the second male thread being provided with a second outer sealing stage that mates with the Y-shaped sealing ring, wherein a second inner mounting hole that mates with the second mounting stage on the second transmission screw stirrer rod is disposed in the second threaded inner sleeve.

Compared to the prior art, the invention has the following beneficial effects:

On the one hand, the Y-shaped sealing rings according to the invention are embedded in the first inner seal stage of the first threaded outer sleeve and in the first outer seal stage of the first threaded inner sleeve and in the second inner seal stage of the second threaded outer sleeve and the second outer seal stage of the second threaded inner sleeve. This sealing method effectively prevents rubber-plastic compound dust from escaping through the gap between the first threaded inner sleeve and the first threaded outer sleeve and through the gap between the second threaded inner sleeve and the second threaded outer sleeve. In this way, dust pollution is reduced, employee health is protected and material waste is reduced.

On the one hand, in the invention, the oil in the oil passage flows into the first oil filling groove through the first oil filling hole on the first threaded outer sleeve and into the second oil filling groove through the second oil filling hole on the second threaded outer sleeve. This structure first mixes dust and oil into a mixture to prevent the dust from escaping. Second, the life of the Y-shaped ring can be guaranteed and the frictional force of the friction parts can be reduced, to further improve the life of the friction parts, reduce maintenance costs and improve production efficiency.

In the performance-equivalent sealing device according to the present invention, when the first transmission screw stirring rod and the second transmission screw stirring rod rotate and the two transmission screw rods move in opposite directions, the first threaded outer sleeve and the second threaded outer sleeve are stationary. And the thread screwing direction between the first threaded inner sleeve and the first threaded outer sleeve fixed to the first transmission screw rake is opposite, and the threaded screwing direction between the second threaded inner sleeve and the second threaded outer sleeve fixed to the second transmission screw rake is opposite. All the rubber dust and rubber compound move to both sides under the high pressure in the inner mixing chamber. There is a certain movement difference between the rubber compound and the transmission screw rod. The difference in motion causes the rubber compound to generate an axial reaction force opposite to the spiral direction. Therefore, the rubber compound can flow back into the internal mixing chamber between the thread gaps. Therefore, the performance-equivalent sealing device greatly improves the utilization rate of materials, greatly reduces energy loss, reduces pollution of the production environment, and further protects employees' physical and mental health.

character list

• 1 ist ein Strukturdiagramm des Innenmischers der vorliegenden Erfindung.
• 2 ist eine Schnittansicht der inneren Struktur des Innenmischers der vorliegenden Erfindung.
• 3 ist ein strukturelles Explosionsdiagramm des ersten Leistungsdichtungsmechanismus der vorliegenden Erfindung.
• 4 ist ein strukturelles Explosionsdiagramm des zweiten Leistungsdichtungsmechanismus der vorliegenden Erfindung.
• 5 ist ein Strukturdiagramm des Hauptmischkastenkörpers an der Innenmischkammer der vorliegenden Erfindung.
• 6 ist ein Strukturdiagramm der Zufuhrmischabdeckung an der Innenmischkammer der vorliegenden Erfindung.
• 7 ist ein Strukturdiagramm der ersten Übertragungsschraubenrührstange an dem ersten Leistungsdichtungsmechanismus der vorliegenden Erfindung.
• 8 ist ein Strukturdiagramm der ersten Übertragungsschraubenrührstange an dem zweiten Leistungsdichtungsmechanismus der vorliegenden Erfindung.
• 9 ist ein Strukturdiagramm der ersten Gewindeaußenhülse an dem ersten Leistungsdichtungsmechanismus der vorliegenden Erfindung.
• 10 ist ein Strukturdiagramm der zweiten Gewindeaußenhülse an dem ersten Leistungsdichtungsmechanismus der vorliegenden Erfindung.
• 11 ist ein Strukturdiagramm der ersten Gewindeinnenhülse an dem ersten Leistungsdichtungsmechanismus der vorliegenden Erfindung.
• 12 ist ein Strukturdiagramm der zweiten Gewindeinnenhülse an dem ersten Leistungsdichtungsmechanismus der vorliegenden Erfindung.

The invention is further described with reference to the enclosed figures.

• 1 Fig. 12 is a structural diagram of the internal mixer of the present invention.
• 2 Fig. 12 is a sectional view of the internal structure of the internal mixer of the present invention.
• 3 13 is an exploded structural diagram of the first power seal mechanism of the present invention.
• 4 13 is an exploded structural diagram of the second power seal mechanism of the present invention.
• 5 Fig. 12 is a structural diagram of the main mixing box body at the internal mixing chamber of the present invention.
• 6 Fig. 12 is a structural diagram of the feed mixing cover on the internal mixing chamber of the present invention.
• 7 Fig. 12 is a structural diagram of the first transmission screw rake on the first power sealing mechanism of the present invention.
• 8th Fig. 12 is a structural diagram of the first transmission screw rake on the second power seal mechanism of the present invention.
• 9 12 is a structural diagram of the first threaded outer sleeve on the first power sealing mechanism of the present invention.
• 10 12 is a structural diagram of the second threaded outer sleeve on the first power sealing mechanism of the present invention.
• 11 12 is a structural diagram of the first threaded inner sleeve on the first power seal mechanism of the present invention.
• 12 12 is a structural diagram of the second threaded inner sleeve on the first power sealing mechanism of the present invention.

reference list

1

main mixing box body,

11

first upper shaft hole,

12

Second upper shaft hole;

2

feed mixing cover,

21

first lower shaft hole,

22

second bottom shaft hole,

3

First power sealing mechanism,

23

feed opening;

4

Second power sealing mechanism,

5

seal cover,

6

y-shaped sealing ring,

31

First transmission screw rake,

311

first screw stirring part,

312

first positioning stage,

313

First transmission rod;

32

First threaded outer sleeve,

321

first positioning stage,

322

First clamping groove;

323

first sleeve body,

324

first oil filling groove,

325

First sealing inner stage,

326

First oil fill hole;

327

First internal thread;

33

First threaded inner sleeve,

331

First mounting inner hole,

332

First seal coverage stage,

333

First sealing stage,

334

First external thread;

41

Second transmission screw rake,

411

second screw stirring part,

412

second positioning stage,

413

Second Transmission Rod;

42

second threaded outer sleeve,

421

second positioning stage,

422

second clamping groove,

423

second sleeve body,

424

second oil filling groove,

425

Second inner seal stage,

426

Second oil filling hole;

427

Second internal thread;

43

second threaded inner sleeve,

431

second inner mounting hole,

432

Second seal coverage stage,

433

second sealing stage,

434

Second external thread;

Specific embodiment

The technical solution of the present invention is described in more detail by the embodiment.

As in 1 , 2 , 3 and 4 shown, an internal mixer with performance-equivalent sealing device comprises an internal mixing chamber and a performance-equivalent sealing device, the performance-equivalent sealing device comprising a first power sealing mechanism 3 and a second power sealing mechanism 4, the first power sealing mechanism 3 being installed in the first shaft hole of the inner mixing chamber, the second power sealing mechanism 4 being installed in the second Shaft hole of internal mixing chamber is installed.

As in 5 and 6 As shown, the internal mixing chamber of the present invention will be further explained.

The internal mixing chamber comprises a main mixing box body 1 and a supply mixing cover 2, the supply mixing cover 2 being fixed to the main mixing box body 1.

Preferably, the first shaft hole comprises a first upper shaft hole 11 on the main mixing bowl ten body 1 and a first lower shaft hole 21 on the feed mixing cover 2.

Preferably, the second shaft hole includes a second upper shaft hole 12 on the main mixing box body 1 and a second lower shaft hole 22 on the supply mixing cover 2.

Preferably, the first shaft hole and the second shaft hole are through holes, and the first shaft hole and the second shaft hole are the same size. The center of the first shaft hole and the second shaft hole is connected to the internal mixing chamber.

The purpose of this design is to easily install the first power seal mechanism 3 and the second power seal mechanism 4 into the first shaft hole and the second shaft hole, greatly saving manpower and material resources and facilitating installation.

As in 3 shown, the first power sealing mechanism 3 will be described.

The first power sealing mechanism 3 comprises a first transmission screw stirring rod 31, two first threaded outer sleeves 32, two first threaded inner sleeves 33, two Y-shaped sealing rings 6 and two sealing covers 5, with two first threaded inner sleeves 33 being respectively fixed on both sides of the first transmission screw stirring rod 31, the two first threaded inner sleeves 33 are installed symmetrically.

The two first threaded inner sleeves 33 are embedded in the two first threaded outer sleeves 32, the two first threaded outer sleeves 32 being fixed in the first shaft hole, the two Y-shaped sealing rings 6 respectively encased in the first sealing outer stages 333 of the two first threaded inner sleeves 33 and into the two first threaded outer sleeves 32 are embedded. The two seal covers 5 are each encased in the first transmission screw stirring rod 31, and press the two Y-shaped seal rings 6 respectively simultaneously onto the two first threaded outer sleeves 32 and the two first threaded inner sleeves 33. The purpose of the two Y-shaped seal rings 6 is to make the To achieve the function of air sealing and prevent the dust from escaping.

As in 7 shown, the first transmission screw rake is 31 in 3 specially described.

Preferably, the center of the first transmission screw stirring rod 31 is provided with a first screw stirring part 311, and the first screw stirring part 311 is located in the internal mixing chamber, the two sides of the first screw stirring part 311 are provided with a first positioning step 312, which mates with the first threaded inner sleeve 33, where the outside of the first positioning stage 312 is provided with a first transmission rod 313 . The first transmission rod 313 is arranged to install the transmission gear and drive the first transmission screw stirring rod 31 .

As in 9 shown, the first threaded outer sleeve 32 in 3 specially described.

The first threaded outer sleeve 32 preferably comprises a first sleeve body 323, the outer diameter of the first sleeve body 323 being larger than that of the first shaft hole, with a first internal thread 327 being arranged in the first sleeve body 323 counter to the screwing direction of the first threaded inner sleeve 33.

Preferably, a first oil filling groove 324 is formed above the axial direction of the first female thread 327, and a first inner seal step 325 mating with the Y-shaped seal ring 6 is formed above the axial direction of the first oil filling groove 324.

Preferably, a first positioning step 321 larger than the first shaft hole is formed under the axial direction of the first sleeve body 323, and the helical pitch and helical direction of the female thread formed in the first positioning step 321 are the same as those of the first female thread 327.

Preferably, a first clamp groove 322 mating with the first shaft hole is formed above the axial direction of the first positioning step 321, the first clamp groove 322 being between the first sleeve body 323 and the first positioning step 321. The purpose of the first clamp groove 322 is as follows to fix the first threaded outer sleeve 32 in the first shaft hole.

Preferably, a first oil filling hole 326 is arranged between the inner wall of the first oil filling groove 324 and the outer wall of the first sleeve body 323 . The first purpose of arranging the first oil filling hole 326 is to facilitate filling with oil and then the oil flows into the first oil filling groove 324 . The purpose is to lubricate the gear parts and vulnerable parts and extend the life of gear parts and vulnerable parts. The second purpose is to further mix the dust with the oil.

Preferably, the clearance between the first threaded outer sleeve 32 and the first threaded inner sleeve 33 is 0.1-3 mm, including 0.1 mm and 3 mm. The smaller the fitting clearance, the better the performance-equivalent sealing effect.

As in 11 shown, the first threaded inner sleeve 33 in 3 specially described.

Preferably, a first external thread 334 is arranged on the first threaded inner sleeve 33 , one side of the first external thread 334 being provided with a first sealing outer step 333 which mates with the Y-shaped sealing ring 6 .

Preferably, a first inner mounting hole 331 that mates with the first mounting step 312 on the first transmission screw stirring rod 31 is disposed in the first threaded inner sleeve 33 . The first attachment inner hole 331 is attached to the first attachment step 312 of the first transmission screw stirring rod 31, and the attachment method includes attachment by fixed attachment or attachment to the first attachment step 312 by a keyway and a pin mating with the keyway.

As in 4 shown, the second power sealing mechanism 4 will be described.

The second power sealing mechanism 4 comprises a second transmission screw stirring rod 41, two second threaded outer sleeves 42, two second threaded inner sleeves 43, two Y-shaped sealing rings 6 and two sealing covers 5 , two second threaded inner sleeves 43 are respectively fixed on both sides of the second transmission screw stirring rod 41, the two second threaded inner sleeves 43 are installed symmetrically.

The two second threaded inner sleeves 43 are embedded in the two second threaded outer sleeves 42, the two second threaded outer sleeves 42 are fixed in the second shaft hole, the two Y-shaped sealing rings 6 respectively sheathed in the second sealing outer steps 433 of the two second threaded inner sleeves 43 and in the two second threaded outer sleeves 42 are embedded. The two seal covers 5 are each sheathed in the second transmission screw stirring rod 41, and press the two Y-shaped seal rings 6 onto the two second threaded outer sleeves 42 and the two second threaded inner sleeves 43 at the same time. The purpose of the two Y-shaped seal rings 6 is to perform the function of the air seal and prevent dust from escaping.

As in 8th shown, the second transmission screw rake 41 in 4 specially described.

Preferably, the middle of the second transmission screw stirring rod 41 is provided with a second screw stirring part 411, and the second screw stirring part 411 is located in the inner mixing chamber, the two sides of the second screw stirring part 411 are provided with a second positioning step 412, which mates with the second threaded inner sleeve 43, where the outside of the second positioning stage 412 is provided with a second transmission rod 413 . The second transmission rod 413 is arranged to install the transmission gear and drive the second transmission screw stirring rod 41 .

As in 10 shown, the second threaded outer sleeve 42 in 4 specially described.

Preferably, the second threaded outer sleeve 42 comprises a second sleeve body 423, wherein the outer diameter of the second sleeve body 423 is larger than that of the second shaft hole, wherein a second internal thread 427 is arranged in the second sleeve body 423 counter to the thread screwing direction of the second threaded inner sleeve 43.

Preferably, a second oil filling groove 422 is formed above the axial direction of the second female thread 427, and a second inner seal step 425 mating with the Y-shaped seal ring 6 is formed above the axial direction of the second oil filling groove 422.

Preferably, a second positioning step 421 larger than the second shaft hole is formed under the axial direction of the second sleeve body 423, and the helical pitch and helical direction of the female thread formed in the second positioning step 421 are the same as those of the second female thread 427.

Preferably, a second clamp groove 422 mating with the second shaft hole is formed above the axial direction of the second positioning stage 421, the second clamp groove 422 being between the second sleeve body 423 and and the second positioning stage 421. The purpose of the second clamping groove 422 is to fix the second threaded outer sleeve 42 in the first shaft hole.

A second oil filling hole 426 is preferably arranged between the inner wall of the second oil filling groove 424 and the outer wall of the second sleeve body 423 . The first purpose of arranging the second oil filling hole 426 is to facilitate filling with oil. The purpose is to lubricate the gear parts and vulnerable parts and extend the life of the gear parts and vulnerable parts. The second purpose is to further mix the dust with the oil.

Preferably, the clearance between the second threaded outer sleeve 42 and the second threaded inner sleeve 43 is 0.1-3 mm, including 0.1 mm and 3 mm. The smaller the fitting clearance, the better the performance-equivalent sealing effect.

As in 12 shown, the second threaded inner sleeve 43 in 4 specially described.

Preferably, a second external thread 434 is arranged on the second threaded inner sleeve 43 , one side of the second external thread 434 being provided with a second sealing outer step 434 which mates with the Y-shaped sealing ring 6 .

Preferably, a second inner mounting hole 431 that mates with the second mounting step 412 on the second transmission screw stirring rod 41 is disposed in the second threaded inner sleeve 43 . The second attachment inner hole 431 is attached to the second attachment stage 412 of the second transmission screw stirring rod 41 . (The method of attachment includes attachment by rigid attachment or attachment to the second stage attachment 412 by a keyway and keyway mating pin).

As in 3 and 4 1, the first power sealing mechanism 3 and the second power sealing mechanism 4 will be further described.

The moving directions of the first power seal mechanism 3 and the second power seal mechanism 4 are opposite. The thread screwing direction of the first outer sleeve 32 in the first power seal mechanism 3 is opposite to that of the second outer sleeve 42 in the second power seal mechanism 4 . The thread screwing direction of the first threaded inner sleeve 33 in the first power seal mechanism 3 is opposite to that of the second threaded inner sleeve 443 in the second power seal mechanism 4 .

According to the above features combined, the sealing structure of the invention will be specifically described.

Structural principle of the air seal: In the invention, the Y-shaped sealing ring 6 is respectively into the first inner seal stage 325 of the first threaded outer sleeve 32 and the first outer seal stage 333 of the first threaded inner sleeve 33, and into the second inner seal stage 425 of the second threaded outer sleeve 42 and the second outer seal stage 433 of the second Threaded inner sleeve 43 embedded. The Y-shaped structural part of the Y-shaped seal ring 6 faces inward and the flat part touches the seal cover. When the air pressure in the internal mixing chamber flows from high pressure to low pressure, the Y-shaped structural part of the Y-shaped seal ring 6 is compressed on both sides to seal the inner wall of the first inner seal stage 325 with the outer wall of the first outer seal stage 333 and the inner wall of the second Seal inner seal stage 425 with the outer wall of the second outer seal stage 433. Therefore, the rubber-plastic compound dust is effectively prevented from escaping through the gap between the first threaded inner sleeve 33 and the first threaded outer sleeve 32 and through the gap between the second threaded inner sleeve 43 and the second threaded outer sleeve 42 . This sealing structure can prevent dust pollution and protect workers' health.

Oil filling function: Oil in the oil line flows into the first oil filling groove 324 through the first oil filling hole 326 on the first threaded outer sleeve 32, and further flows into the second oil filling groove 424 through the second oil filling hole 426 on the second threaded outer sleeve 42. When part of the rubber dust from the gap between of the first threaded inner sleeve 33 and the first threaded outer sleeve 32 and escapes from the gap between the second threaded inner sleeve 42 and the second threaded outer sleeve 43, oil and dust are mixed into a whole and then flows into the inner mixing chamber through the performance-equivalent sealing device. At the same time, the oil filling can ensure the life of the Y-shaped ring, reduce the frictional force of the friction parts, further improve the life of the friction parts, reduce maintenance costs, and improve production efficiency.

Working principle of power equivalent seal: the first transmission screw rake 31 and the second transmission screw rake 41 rotate, and the direction of movement of the two transmission screw rods is opposite, and the first threaded outer sleeve 32 and the second threaded outer sleeve 42 are stationary. And the threading direction between the first threaded inner sleeve 33 and the first threaded outer sleeve 32 fixed to the first transmission screw stirring rod 31 is opposite, and the threading direction between the second threaded inner sleeve 43 and the second threaded outer sleeve 42 fixed to the second transmission screw stirring rod 41 is opposite. There is a gap of 0.1 to 3 mm between the first threaded outer sleeve 32 and the first threaded inner sleeve 33 . There is a gap of 0.1 to 3 mm between the second threaded outer sleeve 42 and the second threaded inner sleeve 43 . When all the rubber compound (including dust) moves outward under the high pressure in the internal mixing chamber, the rubber compound flows toward the gap. There is a certain movement difference between the rubber compound and the transmission screw rod. The difference in motion causes the rubber compound to generate an axial reaction force opposite to the spiral direction. Therefore, the rubber compound between the thread gaps can flow into the internal mixing chamber again, and the sealing effect is achieved.

The above embodiment is only for the purpose of explaining the technical concept and features of the invention. The purpose is that the technical personnel in this field can understand the content of the invention and implement it according to it. This does not limit the scope of the invention. Any equivalent changes or modifications made in accordance with the gist of the invention fall within the scope of the invention.

Claims (10)

An internal mixer with performance-equivalent sealing device comprising an internal mixing chamber and a performance-equivalent sealing device, characterized in that the performance-equivalent sealing device comprises a first power sealing mechanism and a second power sealing mechanism, the first power sealing mechanism being installed in the first shaft hole of the inner mixing chamber, the second power sealing mechanism being installed in the second shaft hole the internal mixing chamber is installed. An internal mixer with a performance-equivalent sealing device claim 1 , characterized in that the first power sealing mechanism comprises a first transmission screw stirring rod, two first threaded outer sleeves, two first threaded inner sleeves, two Y-shaped sealing rings and two sealing covers, wherein two first threaded inner sleeves are respectively fixed on both sides of the first transmission screw stirring rod, the first threaded inner sleeve in the first threaded outer sleeve is embedded, with two first threaded outer sleeves fixed in the first shaft hole, with the two Y-shaped sealing rings respectively sheathed in the first sealing outer stages of the two first threaded inner sleeves and embedded in the two first threaded outer sleeves, with the two sealing covers respectively in the first transmission screw stirring rod are encased, and the two Y-shaped sealing rings simultaneously press on the first two threaded outer sleeves and the first two threaded inner sleeves. An internal mixer with a performance-equivalent sealing device claim 2 , characterized in that the second power sealing mechanism comprises a second transmission screw stirring rod, two second threaded outer sleeves, two second threaded inner sleeves, two Y-shaped sealing rings and two sealing covers, wherein two second threaded inner sleeves are respectively fixed on both sides of the second transmission screw stirring rod, the two second threaded inner sleeves in the two second threaded outer sleeves are embedded, the two second threaded outer sleeves are fixed in the second shaft hole, the two Y-shaped sealing rings are respectively sheathed in the second sealing outer stages of the two second threaded inner sleeves, and embedded in the two second threaded outer sleeves, the two sealing covers are respectively in the second transmission screw stirring rod are sheathed, and the two Y-shaped sealing rings simultaneously press the two second threaded outer sleeves and the two second threaded inner sleeves. An internal mixer with a performance-equivalent sealing device claim 2 , characterized in that the first threaded outer sleeve comprises a first sleeve body, the outer diameter of the first sleeve body being greater than that of the first shaft hole, a first internal thread being arranged in the first sleeve body opposite to the thread screwing direction of the first threaded inner sleeve, a first oil filling groove above the axial direction of the first female thread, wherein a first inner seal stage, which fits with the Y-shaped seal ring, is formed above the axial direction of the first oil filling groove, wherein a first positioning stage larger than the first shaft hole is formed below the axial direction of the first sleeve body is formed, wherein the helical pitch and helical direction of the out in the first positioning stage formed internal threads are the same as those of the first internal thread, wherein a first clamping groove that mates with the first shaft hole is formed above the axial direction of the first positioning stage, the first clamping groove being between the first sleeve body and and the first positioning stage, wherein a first oil filling hole is arranged between the inner wall of the first oil filling groove and the outer wall of the first sleeve body, wherein the fitting clearance between the first threaded outer sleeve and the first threaded inner sleeve is 0.1-3 mm. An internal mixer with a performance-equivalent sealing device claim 3 , characterized in that the second threaded outer sleeve comprises a second sleeve body, wherein the outer diameter of the second sleeve body is larger than that of the second shaft hole, wherein a second internal thread is arranged in the second sleeve body opposite to the thread screwing direction of the second threaded inner sleeve, wherein a second oil filling groove above the axial direction of the second internal thread, wherein a second inner seal stage, which fits with the Y-shaped seal ring, is formed above the axial direction of the second oil filling groove, wherein a second positioning stage, which is larger than the second shaft hole, is formed below the axial direction of the second sleeve body, wherein the helical pitch and helical direction of the female thread formed in the second positioning stage are the same as those of the second female thread, wherein a second clamping groove mating with the second shaft hole is formed above de r axial direction of the second positioning stage, wherein the second clamping groove is located between the second sleeve body and the second positioning stage, wherein a second oil filling hole is arranged between the inner wall of the second oil filling groove and the outer wall of the second sleeve body, the fitting clearance between the second threaded outer sleeve and the second threaded inner sleeve is 0.1-3mm. An internal mixer with a performance-equivalent sealing device claim 2 , characterized in that the center of the first transmission screw stirring rod is provided with a first screw stirring part, and the first screw stirring part is located in the inner mixing chamber, the two sides of the first screw stirring part are provided with a first positioning step that mates with the first threaded inner sleeve, the outside of the first positioning stage is provided with a first transmission rod. An internal mixer with a performance-equivalent sealing device claim 3 , characterized in that the middle of the second transmission screw stirring rod is provided with a second screw stirring part, and the second screw stirring part is located in the inner mixing chamber, the two sides of the second screw stirring part are provided with a second positioning step that mates with the second threaded inner sleeve, the outside the second positioning stage is provided with a second transmission rod. An internal mixer with a performance-equivalent sealing device claim 1 , characterized in that the directions of movement of the first power seal mechanism and the second power seal mechanism are opposite, the threading direction of the first threaded outer sleeve in the first power sealing mechanism being opposite to that of the second threaded outer sleeve in the second power sealing mechanism, the threading direction of the first threaded inner sleeve in the first power sealing mechanism being opposite to that of the second Threaded inner sleeve is opposed in the second power sealing mechanism. An internal mixer with a performance-equivalent sealing device claim 1 , characterized in that the internal mixing chamber comprises a main mixing box body and a supply mixing cover, the supply mixing cover being fixed to the main mixing box body, the first shaft hole comprising a first upper shaft hole on the main mixing box body and a first lower shaft hole on the supply mixing cover, the second shaft hole comprising a second upper shaft hole on the main mixing box body and a second lower shaft hole on the supply mixing cover, the first shaft hole and the second shaft hole being through holes, the first shaft hole and the second shaft hole having the same size and shape, the center of the first shaft hole and the second shaft hole being aligned with the Internal mixing chamber is connected. An internal mixer with a performance-equivalent sealing device claim 3 , characterized in that a first external thread is arranged on the first threaded inner sleeve, one side of the first external thread being provided with a first sealing outer stage which mates with the Y-shaped sealing ring, a first fastening inner hole being connected to the first fastening stage on the first Transmission screw stirring rod fits together, is arranged in the first threaded inner sleeve, with a second male thread is disposed on the second threaded inner sleeve, one side of the second male thread being provided with a second sealing outer stage that mates with the Y-shaped sealing ring, wherein a second fastening inner hole that mates with the second fastening stage on the second transmission screw stirring rod is in the second Threaded inner sleeve is arranged.

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