CN210679648U

CN210679648U - Screw oil sealing device and plastic extruding machine with same

Info

Publication number: CN210679648U
Application number: CN201921504008.6U
Authority: CN
Inventors: 张兴英; 沈正路
Original assignee: Dawei Plastic Technology (nanjing) Co Ltd
Current assignee: Dawei Plastic Technology (nanjing) Co Ltd
Priority date: 2019-09-10
Filing date: 2019-09-10
Publication date: 2020-06-05
Anticipated expiration: 2029-09-10

Abstract

The utility model provides a screw rod oil sealing device and have its extruding machine, includes screw rod body, oil core and oil pocket, the oil core inserts the screw rod is originally internal, the oil pocket cladding in outside the stalk portion of screw rod body this internal coolant liquid runner that is formed with of screw rod be formed with inlet and liquid outlet on the oil pocket the screw rod body with be provided with a plurality of sealing washers between the oil pocket, follow the inlet reaches the liquid outlet extremely the direction of oil pocket tip has formed gradually first sealing washer and second sealing washer, first sealing washer includes spring seal circle and O type sealing washer, the spring seal circle cover is located on the screw rod body, O type sealing washer cover is located on the spring seal circle. The screw oil sealing device has better sealing performance.

Description

Screw oil sealing device and plastic extruding machine with same

Technical Field

The utility model belongs to the technical field of extruding machine spare part and specifically relates to a screw rod oil seal device and have its extruding machine.

Background

In an extruder, the control of the temperature of a screw has a very important role in the plasticization and flow of materials, and because the solution of the materials generates a large amount of heat under the action of high shear force, the heat cannot be completely and rapidly dissipated by the cooling effect of a cylinder, and in order to facilitate the temperature control, a cooling system is generally arranged in the screw to control the temperature of the screw. In the prior art, the cooling system may typically be air cooled, closed coolant cooled, or the like.

The air type cooling generally processes two through holes on the handle of the screw, and adopts the mode that the back hole enters the front hole and exits to fill in cooling air to control the temperature of the screw.

The closed cooling method generally includes vacuuming the screw hole, sealing, and forming a circulation loop of cooling fluid in the screw, where the cooling fluid flows to take away a large amount of heat. In this way, the design of the sealing device is very important, the existing sealing device generally adopts O-shaped full sealing, but in this cooling mode, the sealing performance is poor when the screw rod works, and the coolant overflows seriously.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a screw oil sealing device and have its extruding machine, this screw oil sealing device has better sealing performance.

The utility model provides a screw rod oil sealing device, including screw rod body, oil core and oil pocket, the oil core inserts the screw rod is originally internal, the oil pocket cladding in outside the stalk portion of screw rod body this internal coolant liquid runner that is formed with of screw rod be formed with inlet and liquid outlet on the oil pocket the screw rod body with be provided with a plurality of sealing washers between the oil pocket, follow the inlet reaches the liquid outlet extremely the direction of oil pocket tip has formed gradually first sealing washer and second sealing washer, first sealing washer includes spring seal circle and O type sealing washer, the spring seal circle cover is located on the screw rod body, O type sealing washer cover is located on the spring seal circle.

Further, the second sealing ring is a spring sealing ring.

Further, the oil pocket comprises an oil pocket body and end covers positioned at two ends of the oil pocket body, mounting grooves for mounting the sealing rings are formed in one side of the oil pocket facing the screw body, the mounting groove corresponding to the first sealing ring is formed in the oil pocket body, and the mounting groove corresponding to the second sealing ring is formed between the oil pocket body and the end covers.

Further, an adjusting gasket is arranged between the end cover and the side wall of the screw body.

Furthermore, the oil core comprises an oil core pipe and a plug, a first cavity is formed in the screw rod body, a second cavity is formed in the oil core pipe, one end of the oil core pipe is fixed on the plug, the other end of the oil core pipe extends into the first cavity, the plug is plugged at one end of a processing hole of the first cavity, the liquid inlet penetrates through the screw rod body and the side wall of the oil core pipe and then is connected with the second cavity, the liquid outlet penetrates through the side wall of the screw rod body and then is connected with the first cavity, and the liquid inlet, the second cavity, the first cavity and the liquid outlet form a cooling liquid flow channel.

Further, a third sealing ring is arranged between the liquid inlet and the liquid outlet.

Further, the screw body divide into reinforced section and plastify section, the oil core pipe includes oil core pipe body, first sleeve and second sleeve the oil core pipe for the position of the reinforced section of screw body, first sleeve ring is located outside the oil core pipe body, the second sleeve ring is located outside the first sleeve with be formed with the third cavity between the oil core pipe body the second sleeve with be formed with the fourth cavity between the first sleeve, be provided with the fifth sealing washer between the oil core pipe body with the lateral wall of first cavity, the fifth sealing washer will first cavity divide into reinforced section cavity and plastify section cavity, be provided with first inlet, first liquid outlet, second inlet and second liquid outlet on the oil package, first inlet, the second cavity, plastify section cavity, The third cavity and the first liquid outlet form one cooling liquid flow channel, and the second liquid inlet, the fourth cavity, the plasticizing section cavity and the second liquid outlet form the other cooling liquid flow channel.

Furthermore, the first liquid inlet, the first liquid outlet, the second liquid inlet and the second liquid outlet are sequentially arranged, the end parts, close to one side of the first cavity machining hole, of the oil core pipe body, the first sleeve and the second sleeve sequentially shrink towards the inside of the first cavity, the first liquid inlet is communicated with the second cavity, the first liquid outlet is communicated with the third cavity, the second liquid inlet is communicated with the fourth cavity, and the second liquid outlet is communicated with the cavity of the feeding section.

Furthermore, fourth sealing rings are arranged between the first liquid inlet and the first liquid outlet, between the first liquid outlet and the second liquid inlet, and between the second liquid inlet and the second liquid outlet.

The utility model also provides an extruding machine, the extruding machine includes the utility model provides a screw rod oil sealing device.

To sum up, the utility model discloses in, through the setting of oil core pipe, oil package and a plurality of sealing washer, can provide better sealing performance for the cooling runner in the screw rod, and simple to operate, the life-span is longer.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented according to the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more obvious and understandable, the following preferred embodiments are described in detail with reference to the accompanying drawings.

Drawings

Fig. 1 is a schematic cross-sectional structural view of a screw oil sealing device according to a first embodiment of the present invention.

Fig. 2 is an enlarged schematic view of a portion a in fig. 1.

Fig. 3 is an enlarged schematic view of a portion B in fig. 1.

Fig. 4 is a schematic cross-sectional structural view of a screw oil sealing device according to a second embodiment of the present invention.

Fig. 5 is an enlarged schematic view of the structure at C in fig. 4.

Fig. 6 is an enlarged schematic view of the structure at D in fig. 4.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the intended purpose of the invention, the following detailed description is given with reference to the accompanying drawings and preferred embodiments.

The utility model provides a screw rod oil sealing device and have its extruding machine, this screw rod oil sealing device have better sealing performance.

Fig. 1 is a schematic cross-sectional structure view of a screw oil sealing device according to a first embodiment of the present invention, fig. 2 is an enlarged schematic structural view of a point a in fig. 1, and fig. 3 is an enlarged schematic structural view of a point B in fig. 1. As shown in fig. 1 to 3, a screw oil sealing device according to a first embodiment of the present invention includes a screw body 10, an oil core 20 and an oil pocket 30, a first cavity 31 is formed in the screw body 10, the oil core 20 includes an oil core tube 21 and a plug 22, a second cavity 32 is formed in the oil core tube 21, one end of the oil core tube 21 is fixed on the plug 22, the other end of the oil core tube extends into the first cavity 31 of the screw body 10, and the first cavity 31 is communicated with the second cavity 32, the plug 22 is plugged at one end of a processing hole of the first cavity 31, the oil pocket 30 is wrapped outside a handle portion of the screw body 10, a liquid inlet 41 and a liquid outlet 42 are provided on the oil pocket 30, the liquid inlet 41 is connected with the second cavity 32 after passing through side walls of the screw body 10 and the oil core tube 21, and the liquid outlet 42 is connected with the first cavity 31 after passing through the side wall of the. That is, the inlet port 41, the second cavity 32, the first cavity 31 and the outlet port 42 form a completed coolant flow passage.

As shown in fig. 2, in order to ensure the sealing performance of the screw oil sealing device, in the present embodiment, a plurality of seal rings are provided between the shank of the screw body 10 and the oil pocket 30. Specifically, the sealing rings sequentially form a first sealing ring 51 and a second sealing ring 52 along the direction from the liquid inlet 41 and the liquid outlet 42 to the end of the oil pocket 30, the first sealing ring 51 includes a spring sealing ring and an O-shaped sealing ring, the spring sealing ring is sleeved on the screw body 10, the O-shaped sealing ring is sleeved on the spring sealing ring, and the second sealing ring 52 includes a spring sealing ring. In this embodiment, the spring seal ring is a teflon stainless steel spring seal ring.

Further, an installation groove 31 is formed in the oil pocket 30 so as to be recessed inward toward the screw body 10, and the first seal ring 51 and the second seal ring 52 are installed in the installation groove 31. In the embodiment, the oil pocket 30 includes an oil pocket body 32 and end caps 33 at two ends of the oil pocket body 32, the mounting groove 31 corresponding to the first sealing ring 51 is formed on the oil pocket body 32, and the mounting groove 31 corresponding to the second sealing ring 52 is formed between the oil pocket body 32 and the end caps 33, that is, the oil pocket body 32 and the end caps 33 are respectively formed with a recess, and the mounting grooves 31 corresponding to the second sealing ring 52 are formed after the recesses at the two positions are combined. The installation method of the installation groove 31 can ensure that each sealing ring is convenient to install, the sealing ring cannot be damaged in the dismounting process, the dismounting is convenient, and the service life is longer.

In order to prevent the coolant from flowing between the inlet port 41 and the outlet port 42, in the present embodiment, a third seal ring 53 is further provided between the inlet port 41 and the outlet port 42, and the third seal ring 53 is similarly installed between the screw body and the oil pocket 30.

With reference to fig. 3, in order to further increase the sealing performance of the screw, in the present embodiment, a fourth sealing ring 54 is further disposed between the plug 22 and the sidewall of the first cavity 31 of the screw body 10, so as to ensure the sealing performance between the first cavity 31 and the outside.

Further, an adjusting washer 56 is further sleeved between the end cover 33 and the screw body 10 to ensure that the oil pocket 30 and the screw body 10 are coaxially arranged.

Fig. 4 is a schematic cross-sectional structure view of a screw oil sealing device according to a second embodiment of the present invention, fig. 5 is an enlarged structural view of a point C in fig. 4, and fig. 6 is an enlarged structural view of a point D in fig. 4. As shown in fig. 4 to 6, the screw oil sealing device according to the second embodiment of the present invention has a structure substantially the same as that of the first embodiment, except that in this embodiment, the screw body 10 is divided into the feeding section 11 and the plasticizing section 12 according to the division of functions on the extruder, the oil core tube 21 includes an oil core tube body 211, a first sleeve 212 and a second sleeve 213, the first sleeve 212 is disposed around the oil core tube body 211, the second sleeve 213 is disposed around the first sleeve 212 at a position of the oil core tube 21 corresponding to the feeding section 11 of the screw body 10, that is, the first sleeve 212 is disposed between the second sleeve 213 and the oil core tube body 211, a third cavity 33 is formed between the first sleeve 212 and the oil core tube body 211, a fourth cavity 34 is formed between the second sleeve 213 and the first sleeve 212, when the oil core tube 21 is disposed in the first cavity 31, a fifth sealing ring 55 is disposed between the oil core tube body 211 and the inner side wall of the first cavity 31, the fifth sealing ring 55 divides the first cavity 31 into a feeding section cavity 311 and a plasticizing section cavity 312, the second cavity 32, the plasticizing section cavity 312 and the third cavity 33 are sequentially communicated, and the fourth cavity 34 is communicated with the feeding section cavity 311. The oil pocket 30 is provided with a first liquid inlet 411, a first liquid outlet 421, a second liquid inlet 412 and a second liquid outlet 422, the first liquid inlet 411 passes through the side wall of the screw body 10 and the side wall of the oil core tube body 211 and then is communicated with the second cavity 32, the first liquid outlet 421 passes through the side wall of the screw body 10 and the side wall of the first sleeve 212 and then is communicated with the third cavity 33, the second liquid inlet 412 passes through the side wall of the screw body 10 and the side wall of the second sleeve 213 and then is communicated with the fourth cavity 34, and the second liquid outlet 422 passes through the side wall of the screw body 10 and then is communicated with the cavity 311 of the feeding section.

Through the above arrangement, two coolant flow channels can be formed in the screw body 10, that is, one coolant flow channel is from the first liquid inlet 411, the second cavity 32, the plasticizing section cavity 312, the third cavity 33 to the first liquid outlet 421; another coolant flow path is from the second inlet port 412, the fourth cavity 34, the plasticizing section cavity 312 to the second outlet port 422. Can carry out the regulation and control of temperature to the reinforced section 11 and the plastify section 12 of screw body 10 respectively like this, be favorable to the cooling to adjust more.

Further, in order to facilitate the arrangement of the flow channel, in this embodiment, the first liquid inlet 411, the first liquid outlet 421, the second liquid inlet 412 and the second liquid outlet 422 are sequentially arranged, and the end portions of the oil core tube body 211, the first sleeve 212 and the second sleeve 213, which are close to the side of the processing hole of the first cavity 31, sequentially contract towards the inside of the first cavity 31, that is, the end portions of the oil core tube body 211, the first sleeve 212 and the second sleeve 213 are in a step shape. The structure can ensure that the two circulating flow passages cannot interfere with each other.

Further, in order to increase the sealing performance, fourth sealing rings 54 are disposed between the first liquid inlet 411 and the first liquid outlet 421, between the first liquid outlet 421 and the second liquid inlet 412, and between the second liquid inlet 412 and the second liquid outlet 422.

To sum up, the utility model discloses in, through the setting of oil core pipe 21, oil package 30 and a plurality of sealing washer, can provide better sealing performance for the cooling flow channel in the screw rod, and simple to operate, the life-span is longer.

The utility model discloses still provide an extruding machine, this extruding machine includes foretell screw rod oil seal device, please see prior art about other technical characteristics of this extruding machine, no longer repeated here.

The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiments, and although the present invention has been disclosed with the preferred embodiments, it is not limited to the present invention, and any skilled person in the art can make some modifications or equivalent changes without departing from the technical scope of the present invention.

Claims

1. The utility model provides a screw rod oil sealing device, includes screw rod body, oil core and oil pocket, the oil core inserts in the screw rod body, the oil pocket cladding in outside the stalk portion of screw rod body this internal coolant liquid runner that is formed with of screw rod, its characterized in that: be formed with inlet and liquid outlet on the oil pocket the screw rod body with be provided with a plurality of sealing washer between the oil pocket, follow the inlet reaches the liquid outlet extremely the direction of oil pocket tip has formed gradually first sealing washer and second sealing washer, first sealing washer includes spring seal circle and O type sealing washer, the spring seal circle cover is located on the screw rod body, O type sealing washer cover is located on the spring seal circle.

2. The screw oil seal of claim 1, wherein: the second sealing ring is a spring sealing ring.

3. The screw oil seal of claim 1, wherein: the oil pocket comprises an oil pocket body and end covers positioned at two ends of the oil pocket body, one side of the oil pocket, which faces the screw rod body, is provided with a mounting groove for mounting the sealing ring, the mounting groove corresponding to the first sealing ring is formed on the oil pocket body, and the mounting groove corresponding to the second sealing ring is formed between the oil pocket body and the end covers.

4. The screw oil seal of claim 3, wherein: an adjusting gasket is arranged between the end cover and the side wall of the screw body.

5. The screw oil seal of claim 1, wherein: the oil core comprises an oil core pipe and a plug, a first cavity is formed in the screw rod body, a second cavity is formed in the oil core pipe, one end of the oil core pipe is fixed on the plug, the other end of the oil core pipe extends into the first cavity, the plug plugs one end of a processing hole of the first cavity, the liquid inlet penetrates through the screw rod body and the side wall of the oil core pipe and then is connected with the second cavity, the liquid outlet penetrates through the side wall of the screw rod body and then is connected with the first cavity, and the liquid inlet, the second cavity, the first cavity and the liquid outlet form a cooling liquid flow channel.

6. The screw oil seal of claim 5, wherein: and a third sealing ring is arranged between the liquid inlet and the liquid outlet.

7. The screw oil seal of claim 6, wherein: the screw rod body divide into reinforced section and plastify section, the oil core pipe includes oil core pipe body, first sleeve and second sleeve the oil core pipe for the position of the reinforced section of screw rod body, first sleeve ring is located this external oil core pipe, second sleeve ring is located outside the first sleeve with be formed with the third cavity between the oil core pipe body the second sleeve with be formed with the fourth cavity between the first sleeve, the oil core pipe body with be provided with the fifth sealing washer between the lateral wall of first cavity, the fifth sealing washer will first cavity divide into reinforced section cavity and plastify section cavity, be provided with first inlet, first liquid outlet, second inlet and second liquid outlet on the oil package, first inlet the second cavity, plastify section cavity, The third cavity and the first liquid outlet form one cooling liquid flow channel, and the second liquid inlet, the fourth cavity, the plasticizing section cavity and the second liquid outlet form the other cooling liquid flow channel.

8. The screw oil seal of claim 7, wherein: the first liquid inlet, the first liquid outlet, the second liquid inlet and the second liquid outlet are sequentially arranged, the end parts, close to one side of the first cavity machining hole, of the oil core tube body, the first sleeve and the second sleeve sequentially shrink towards the inside of the first cavity, the first liquid inlet is communicated with the second cavity, the first liquid outlet is communicated with the third cavity, the second liquid inlet is communicated with the fourth cavity, and the second liquid outlet is communicated with the cavity of the feeding section.

9. The screw oil seal of claim 8, wherein: fourth sealing rings are arranged between the first liquid inlet and the first liquid outlet, between the first liquid outlet and the second liquid inlet and between the second liquid inlet and the second liquid outlet.

10. An extruder characterized by: comprising a screw oil seal according to any one of claims 1 to 9.