Design of the roller structure of the double roller mill with circulating cooling circuit

Abstract

The application discloses a kind of to the roller structure of roll mill shaft with circulating cooling circuit, including shaft roller, cooling water input pipe and first end cover, the both ends of roll shaft are equipped with bearing support section, shaft roller is equipped with the cooling cavity that passes through the bearing support section in the end face of one end of shaft roller to the other end of shaft roller, cooling cavity forms cooling cavity opening on the end face of one end of shaft roller, first end cover is sealingly connected on cooling cavity opening, the end face of one end of cooling liquid return cavity is equipped on the end face of first end cover, cooling liquid return cavity is equipped with cooling liquid inlet and cooling liquid outlet, one end of cooling water input pipe is located in the bearing support section of the other end of shaft roller, the other end is sealingly connected together with cooling liquid inlet, cooling liquid return passage is formed between the side wall of cooling water input pipe and cooling liquid return cavity, cooling liquid return passage is connected with cooling cavity and cooling liquid outlet.The application has the advantage that bearing can be cooled, solves the problem that existing sand making machine bearing cannot be fully cooled.

Description

Technical Field

[0001] This invention relates to the field of roller sand making machine technology, and in particular to a roller structure for a double roller sand making machine with a circulating cooling circuit. Background Technology

[0002] Roller sand making machines typically include fixed rollers and movable rollers. Material is fed from above the two rollers, continuously carried into the space between them by the compression rollers, and discharged from the bottom of the machine at an ideal particle size. The relative movement of the two rollers crushes stones into sand. Chinese patent document CN202021220681X, authorized and announced on April 13, 2021, entitled "A Double Roller Sand Making Machine," includes a frame, a first pressing roller, a second pressing roller, and a drive motor. A pressing channel is formed between the first and second pressing rollers. The first pressing roller is rotatably connected to the frame, and the drive motor is connected to the frame to drive the first pressing roller to rotate. The frame has several support legs, each including a base plate, a lifting plate, a top plate, and a column arranged sequentially from bottom to top. The base plate has a positioning ring. A shortcoming of existing roller sand making machines is that they cannot cool the inner ring of the bearings through a circulating cooling system. Summary of the Invention

[0003] The present invention aims to provide a roller structure for a double roller mill with a circulating cooling circuit that can cool the bearings, thus solving the problem that the bearings of existing sand making machines cannot be adequately cooled.

[0004] The above technical problems are solved by the following technical solution: a roller structure for a double roller mill with a circulating cooling circuit, including a roller, with bearing support sections at both ends of the roller, characterized in that it further includes a cooling water inlet pipe and a first end cap, the roller having a cooling cavity extending from one end face of the roller to the bearing support section at the other end of the roller, the cooling cavity forming a cooling cavity opening on the end face of one end of the roller, the first end cap being sealed to the cooling cavity opening, the end face of the first end cap facing the cooling cavity having a coolant return cavity, the coolant return cavity having a coolant inlet and a coolant outlet, one end of the cooling water inlet pipe being located within the portion of the cooling cavity located in the bearing support section at the other end of the roller, the other end passing through the coolant return cavity and being sealed to the coolant inlet, a coolant return channel being formed between the cooling water inlet pipe and the side wall of the coolant return cavity, the coolant return channel connecting the cooling cavity and the coolant outlet. In operation, cooling water enters the cooling water inlet pipe from the coolant inlet, flows out through the portion of the cooling water inlet pipe located inside the bearing support section at the other end of the shaft roller, reaches the cooling chamber, enters the coolant return channel from the cooling chamber, and finally flows out from the coolant outlet. This circulation of coolant achieves cooling of the shaft roller, especially the bearing support section, thereby cooling the bearings connected to the support section from both above and below. This achieves a true cooling cycle.

[0005] Preferably, the portion of the cooling chamber located inside the other end of the roller has a positioning hole, and the other end of the cooling water inlet pipe passes through the positioning hole, thus suspending the cooling water inlet pipe within the cooling chamber. This ensures uniform cooling water return, achieving uniform cooling of all circumferential parts of the bearing support section and uniform cooling of the bearing itself.

[0006] Preferably, the system also includes a positioning sleeve, the internal space of which forms the positioning hole. The cooling cavity passes through the end face of the other end of the shaft roller to form an outer port. The opening area of ​​the inner end of the outer port is larger than the opening area of ​​the end of the cooling cavity connected to the outer port, forming a first limiting step. The positioning sleeve passes through the inner end of the outer port and is limited within the outer port by the first limiting step. The outer port is sealed with a second end cap. This allows for convenient and accurate fabrication of the positioning hole.

[0007] Preferably, the opening area of ​​the outer end of the outer port is larger than the opening area of ​​the inner end of the outer port, forming a connecting step at the outer port. The second end cap has a small-diameter section that passes through the inner end of the outer port. The second end cap is threaded onto the connecting step at the outer port by a second end cap connecting bolt passing through the second end cap. The small-diameter section is sealed to the inner end of the outer port by a second end cap sealing ring. The structure is compact, the connection is reliable, and accurate positioning and alignment can be easily achieved.

[0008] Preferably, the outer end of the cooling chamber opening has a large-diameter section forming a cooling chamber opening connection step. The first end cap passes through the large-diameter section of the cooling chamber opening. The first end cap is threaded onto the cooling chamber opening connection step via a first end cap bolt passing through the outer end cap. The cooling chamber opening connection step is provided with a first end cap sealing ring that seals the first end cap to the cooling chamber opening connection step. This design ensures reliable connection, accurate positioning, and a compact structure.

[0009] Preferably, the first end cap includes a connecting cylinder and a connecting ring that is detachably and sealingly connected to the connecting cylinder. The connecting ring passes through the large-diameter section of the cooling chamber opening. The coolant inlet and coolant outlet are located within the connecting cylinder, and the outer diameter of the connecting cylinder is smaller than the outer diameter of the connecting ring. This design allows for easy manufacturing and a compact structure.

[0010] Preferably, the outer circumferential surface of the connecting cylinder is provided with a clearance ring groove extending circumferentially along the connecting cylinder. The clearance ring groove isolates a connecting flange on the connecting cylinder. The connecting flange is threaded onto the connecting ring after passing through the connecting flange via a second connecting bolt from the first end cap, thereby connecting the connecting cylinder and the connecting ring together. A second sealing ring from the first end cap is provided between the connecting ring and the connecting flange to seal the connecting flange together with the connecting ring. This design facilitates connection and saves materials.

[0011] Preferably, the inner circumferential surface of the end of the connecting ring that connects to the connecting cylinder is provided with a large-diameter section of the connecting ring portion. This large-diameter section forms a connecting step on the inner circumferential surface of the connecting ring. The connecting flange is provided with a positioning protrusion that passes through the large-diameter section of the connecting ring portion. The second sealing ring of the first end cap presses against the connecting step of the connecting ring portion through the positioning protrusion, thereby achieving a sealing connection between the connecting cylinder and the connecting ring. This provides convenient and reliable sealing.

[0012] Preferably, the opening area of ​​the cooling chamber gradually increases from the outlet end of the cooling water inlet pipe towards the other end. This increases the heat exchange area as the coolant temperature decreases, thereby improving the uniformity of cooling.

[0013] The beneficial effects of this invention are: the cooling water can circulate fully, thereby fully cooling the bearing support sections at both ends of the roller, thus cooling the bearings from both the top and bottom. Attached Figure Description

[0014] Figure 1 This is a cross-sectional schematic diagram of Embodiment 1 of the present invention;

[0015] Figure 2 for Figure 1 A magnified view of a portion of point A;

[0016] Figure 3 for Figure 1 A magnified view of a portion of point B;

[0017] Figure 4 This is a schematic diagram of Embodiment 2 of the present invention.

[0018] In the diagram: 1. Shaft roller; 2. Cooling water inlet pipe; 3. First end cover; 4. Bearing support section; 5. Cooling chamber; 6. Cooling chamber opening; 7. Coolant inlet; 8. One end of cooling water inlet pipe; 9. Outlet; 10. Coolant return channel; 11. Positioning hole; 12. Positioning sleeve; 13. Second end cover; 14. Small diameter section; 15. Second end cover connecting bolt; 16. Second end cover sealing ring; 17. Connecting cylinder; 18. Connecting ring; 19. First connecting bolt of first end cover; 20. First sealing ring of first end cover; 21. Circumvention ring groove; 22. Connecting flange; 23. Second connecting bolt of first end cover; 24. Second sealing ring of first end cover; 25. Positioning protrusion; 26. Outer port; 27. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1, see Figures 1 to 3 A roller structure for a double-roll mill with a circulating cooling circuit includes a roller 1, a cooling water inlet pipe 2, and a first end cap 3. Bearing support sections 4 are provided at both ends of the roller. The roller has a cooling cavity 5 extending from one end face of the roller to the bearing support section at the other end. A cooling cavity opening 6 is formed on the end face of one end of the roller, and the first end cap is sealed to the cooling cavity opening. A coolant return cavity is provided on the end face of the first end cap facing the cooling cavity, with a coolant inlet 7 and a coolant outlet 8. One end 9 of the cooling water inlet pipe is located within the portion of the cooling cavity within the bearing support section at the other end of the roller and has an outlet 10 on its circumferential surface; the other end passes through the coolant return cavity and is sealed to the coolant inlet. A coolant return channel 11 is formed between the cooling water inlet pipe and the sidewall of the coolant return cavity, connecting the cooling cavity and the coolant outlet. In operation, cooling water enters the cooling water inlet pipe from the coolant inlet, flows out through the portion of the cooling water inlet pipe located inside the bearing support section at the other end of the shaft roller, reaches the cooling chamber, enters the coolant return channel from the cooling chamber, and finally flows out from the coolant outlet. This circulation of coolant achieves cooling of the shaft roller, especially the bearing support section, thereby cooling the bearings connected to the support section from both above and below.

[0021] The cooling chamber located inside the other end of the shaft roller has a positioning hole 12. The other end of the cooling water inlet pipe passes through the positioning hole, allowing the cooling water inlet pipe to suspend inside the cooling chamber. It also includes a positioning sleeve 13, the internal space of which forms a positioning hole. The end face of the cooling chamber penetrating the other end of the shaft roller forms an outer port 27. The opening area of ​​the inner end of the outer port is larger than the opening area of ​​the end of the cooling chamber connected to the outer port, forming a first limiting step. The positioning sleeve passes through the inner end of the outer port and is limited within the outer port by the first limiting step. The outer port is sealed with a second end cap 14. The opening area of ​​the outer end of the outer port is larger than the opening area of ​​the inner end of the outer port, forming a connecting step at the outer port. The second end cap has a small-diameter section 15 that passes through the inner end of the outer port. The second end cap is threaded onto the connecting step at the outer port via a second end cap connecting bolt 16. The small-diameter section is sealed within the inner end of the outer port via a second end cap sealing ring 17.

[0022] The outer end of the cooling chamber opening has a large-diameter section forming a connecting step. The first end cover includes a connecting cylinder 18 and a connecting ring 19 detachably and sealably connected to the connecting cylinder. The connecting ring passes through the large-diameter section of the cooling chamber opening, and the coolant inlet and outlet are located on the connecting cylinder. The outer diameter of the connecting cylinder is smaller than the outer diameter of the connecting ring. The connection is also achieved by a first connecting bolt 20 of the first end cover passing through the outer end cover and threaded onto the connecting step of the cooling chamber opening. A first sealing ring 21 of the first end cover is provided on the connecting step of the cooling chamber opening to seal the connecting ring and the connecting step of the cooling chamber opening together. A clearance ring groove 22 extending circumferentially along the outer circumference of the connecting cylinder is provided on the outer circumferential surface of the connecting cylinder. The clearance ring groove isolates a connecting flange 23 on the connecting cylinder. The connecting flange passes through the connecting flange and is threaded onto the connecting ring to connect the connecting cylinder and the connecting ring together. A second sealing ring 25 of the first end cover is provided between the connecting ring and the connecting flange to seal the connecting flange and the connecting ring together. The inner circumferential surface of the end where the connecting ring connects to the connecting cylinder is provided with a large diameter section of the connecting ring. The large diameter section of the connecting ring forms a connecting step on the inner circumferential surface of the connecting ring. The connecting flange is provided with a positioning protrusion 26 that passes through the large diameter section of the connecting ring. The second sealing ring of the first end cover presses against the connecting step of the connecting ring through the positioning protrusion to achieve a sealed connection between the connecting cylinder and the connecting ring.

[0023] Example 2 differs from Example 1 in that:

[0024] See Figure 4 The opening area of ​​the cooling chamber gradually increases from the outlet end of the cooling water inlet pipe toward the other end.

[0025] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0026] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pair of roll structure of a rolling mill provided with a circulating cooling circuit, comprising a roll, both ends of the roll being provided with bearing support sections, characterized in that, The cooling water input pipe and the first end cover are further included, the shaft roller is provided with a cooling cavity in the bearing support section from one end face of the shaft roller to the other end of the shaft roller, the cooling cavity forms a cooling cavity opening on the end face of one end of the shaft roller, the first end cover is sealingly connected on the cooling cavity opening, the first end cover is provided with a cooling liquid return cavity on the end face of one end of the cooling cavity, the cooling liquid return cavity is provided with a cooling liquid inlet and a cooling liquid outlet, one end of the cooling water input pipe is located in the part of the cooling cavity in the bearing support section at the other end of the shaft roller, the other end of the cooling water input pipe is penetratingly arranged in the cooling liquid return cavity and sealingly connected with the cooling liquid inlet, a cooling liquid return channel is formed between the side wall of the cooling liquid return cavity and the cooling water input pipe, the cooling liquid return channel communicates the cooling cavity and the cooling liquid outlet, the part of the cooling cavity in the other end of the shaft roller is provided with a positioning hole, the other end of the cooling water input pipe is penetratingly arranged in the positioning hole so that the cooling water input pipe is suspended in the cooling cavity; the shaft roller structure of the opposed roller machine with a circulating cooling loop further includes a positioning sleeve, the internal space of the positioning sleeve constitutes the positioning hole, the cooling cavity forms an outer port penetrating through the end face of the other end of the shaft roller, the opening area of the inner end of the outer port is larger than the opening area of the connecting end of the cooling cavity and the outer port to form a first limiting step, the positioning sleeve is penetratingly arranged in the inner end of the outer port and is limited in the outer port by the first limiting step, and the outer port is sealingly connected with a second end cover; the opening area of the outer end of the outer port is larger than the opening area of the inner end of the outer port to form an outer port part connecting step, the second end cover is provided with a small diameter section penetratingly arranged in the inner end of the outer port, the second end cover is threadedly connected on the outer port part connecting step by a second end cover connecting bolt penetrating through the second end cover, the small diameter section is sealingly connected in the inner end of the outer port by a second end cover sealing ring, and the opening area of the cooling cavity gradually increases from the end where the outlet end of the cooling water input pipe is located to the other end.

2. The pair of roll structure provided with a circulating cooling circuit according to claim 1, wherein The outer end of the cooling cavity opening is provided with a cooling cavity opening part large diameter section to form a cooling cavity opening part connecting step, the first end cover is penetratingly arranged in the cooling cavity opening part large diameter section, the first end cover is threadedly connected on the cooling cavity opening part connecting step by a first end cover part first connecting bolt penetrating through the outer end cover, and the first end cover part first sealing ring sealingly connects the first end cover and the cooling cavity opening part connecting step together on the cooling cavity opening part connecting step.

3. The pair of rolls structure provided with a circulating cooling circuit according to claim 2, wherein The first end cover includes a connecting cylinder and a connecting ring sealingly and detachably connected together with the connecting cylinder, the connecting ring is penetratingly arranged in the cooling cavity opening part large diameter section, the cooling liquid inlet and the cooling liquid outlet are arranged on the connecting cylinder, and the outer diameter of the connecting cylinder is smaller than the outer diameter of the connecting ring.

4. The pair of rolls with a circulating cooling circuit according to claim 3, wherein The outer circumferential surface of the connecting cylinder is provided with an avoiding ring groove extending along the circumference of the connecting cylinder, the avoiding ring groove separates a connecting flange on the connecting cylinder, the connecting flange is connected with the connecting ring together by the first end cover second connecting bolt, the connecting ring and the connecting flange are provided with the first end cover second sealing ring for sealingly connecting the connecting flange with the connecting ring together.

5. The pair of rolls structure provided with a circulating cooling circuit according to claim 4, wherein The inner circumferential surface of the connecting ring at the end connected with the connecting cylinder is provided with a connecting ring part large diameter section, the connecting ring part large diameter section forms a connecting ring part connecting step on the inner circumferential surface of the connecting ring, the connecting flange is provided with a positioning protrusion penetrating in the connecting ring part large diameter section, the first end cover second sealing ring is pressed on the connecting ring part connecting step by the positioning protrusion to realize the sealing connection of the connecting cylinder and the connecting ring.

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