Hard alloy composite roller

Abstract

The invention relates to a hard alloy composite roller. A hard alloy composite roller comprises a roller shaft, a roller ring and a spacer ring, a first retainer and a second retainer are arranged on the roller shaft, the roller shaft comprises at least two assembly sections which are sequentially arranged in the axial direction, the roller ring and the spacer ring are arranged on the assembly sections, and the assembly sections are located between the first retainer and the second retainer. The outer diameter of the assembly section, close to the first retainer, of every two adjacent assembly sections is larger than that of the assembly section, close to the second retainer, of every two adjacent assembly sections. A third retainer is arranged at the end of the assembly section, close to the second retainer, of every two adjacent assembly sections, and the outer diameter of part of the third retainer or the outer diameter of the whole third retainer is smaller than the outer diameter of the spacer ring or the roller ring. And the spacer ring and the roller ring are limited between two adjacent third retainers or between the third retainers and the first retainers or between the third retainers and the second retainers. The device has the advantages that assembly is convenient, the assembly effect can be guaranteed, and workers can observe and judge the abrasion degree of the middle section of the composite roller conveniently.

Description

Technical Field

[0001] The invention relates to a cemented carbide composite roller, in particular to a cemented carbide composite roller which is easy to observe whether it is worn to a scrap level. Background Art

[0002] The cemented carbide composite roller is a consumable. When the outer circle is worn to the scrap roller diameter, the composite roller will be replaced. See the composite roller disclosed in patents with publication numbers CN209238695U, CN207076772U, etc., including a roller shaft, a roller ring and a spacer ring. An elastic sealing ring is provided between the roller ring and the spacer ring. When the roller ring and the spacer ring on the composite roller are worn to the point that the sealing ring can be seen, it means that the composite roller has been scrapped. In order not to affect production, the composite roller is generally replaced before the sealing ring is worn. For this purpose, a relevant observation structure is provided on the composite roller for easy observation by the staff and the outer diameter is slightly larger than the sealing ring.

[0003] For example, the composite roller disclosed in patents with publication numbers CN209334445U and CN100406145C has a stopper at each end of the roller shaft, with the roller ring and the spacer ring located between the two stoppers. One of the stoppers is a nut, and the other stopper is integrally formed on the shaft, or both stoppers are nuts. Whether the roller ring is scrapped can be determined by observing whether the outer diameter of the stopper is close to the outer diameters of the spacer ring and the roller ring.

[0004] However, the relevant structures for observation and comparison in the above scheme are all arranged on both sides of all roller rings and spacer rings, which are far away from the middle section of the composite roller, making it difficult to judge the degree of wear of the roller rings and spacer rings in the middle section of the composite roller. Patent No. CN220635808U discloses a composite roller, including a roller shaft, and a limiting ring portion extending outward in the circumferential direction is provided in the middle section of the roller shaft. This scheme can judge whether the roller ring is scrapped by comparing and observing the outer diameter of the limiting ring portion with the outer diameter of the adjacent roller ring or spacer ring.

[0005] However, the composite roller of this scheme needs to be flipped back and forth during assembly to facilitate the installation of the roller ring and the spacer ring from both sides. Since the composite roller is heavy, the assembly is more troublesome. The fixed-angle flipping of the composite roller needs to be achieved by supporting assembly auxiliary equipment, which will increase the production cost and make the production more troublesome. At the same time, for composite rollers that need to be equipped with multiple observation structures (such as longer composite rollers), it is difficult to adopt the solution of providing an integrally formed limiting ring portion in the middle section of the composite roller. Summary of the invention

[0006] The purpose of the present invention is to provide a cemented carbide composite roller which is easy to assemble, can ensure the assembly effect, and is convenient for workers to observe and judge the wear degree of the middle section of the composite roller.

[0007] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a cemented carbide composite roller, comprising a roller shaft, a roller ring and a spacer ring sleeved and fixed on the roller shaft, the roller shaft is provided with a first stopper and a second stopper, the roller shaft comprises at least two assembly sections arranged in sequence along the axial direction, the roller ring and the spacer ring are arranged on the assembly section, the assembly section is located between the first stopper and the second stopper, the outer diameter of the assembly section close to the first stopper of two adjacent assembly sections is larger than the outer diameter of the assembly section close to the second stopper; a third stopper is arranged at the end of the assembly section close to the second stopper of two adjacent assembly sections, part of the outer diameter or the whole of the outer diameter of the third stopper is smaller than the outer diameter of the spacer ring or the roller ring, the spacer ring and the roller ring are restricted between two adjacent third stops or between the third stopper and the first stopper or between the third stopper and the second stopper.

[0008] Among them, the first stopper can be a part integrally formed with the roller shaft, and can be a mechanical nut fixed on the roller shaft. The second stopper can be a mechanical nut of a conventional cemented carbide composite roller. The third stopper can be a mechanical nut or a hydraulic nut.

[0009] The staff can not only compare and observe the first and second stops on both sides, but also compare the outer diameter of the third stop at the adjacent assembly section with the outer diameter of the roller ring spacer to judge whether the middle section of the composite roller is worn out and whether it is worn to the extent of being scrapped; if the part of the third stop that is smaller than the outer diameter of the roller ring is worn out, it means that the composite roller is close to or has reached the scrap state. By setting the third stop, part or all of whose outer diameter is smaller than the outer diameter of the spacer or roller ring, the staff can judge the degree of wear of the middle section of the composite roller by observing the relative outer diameter change between the third stop and the roller ring or spacer, so as to replace it in time and avoid production accidents caused by excessive wear.

[0010] When the cemented carbide composite roller of the present invention is to be assembled, the end of the roller shaft for fixing the second stopper is facing upward, the end with the first stopper is facing downward, and the roller shaft is fixed by a clamp or other conventional methods, and then the roller ring and the spacer ring are assembled on the assembly section closest to the first stopper, and then a third stopper is assembled, and the spacer ring and the roller ring are pressed at the lowermost assembly section, and then the roller ring and the spacer ring are assembled at the second assembly section from bottom to top, and then the third stopper or the second stopper is assembled according to the number of assembly sections, so that the spacer ring and the roller ring on two or more assembly sections can be assembled and locked. When assembling the composite roller of the present invention, there is no need to use auxiliary equipment to flip the composite roller 180 degrees, and only the conventional method is needed to assemble the parts in sequence along the axial direction, which simplifies the process and reduces the production cost.

[0011] Preferably, the third stop member includes an axial first portion and an axial second portion along the axial direction, the outer diameter of the axial first portion is larger than the outer diameter of the axial second portion, and the outer diameter of the axial second portion is smaller than the outer diameter of the spacer ring or the roller ring.

[0012] The design of different outer diameters of the first axial portion and the second axial portion of the third stopper allows the third stopper to better fit the adjacent roller ring or spacer ring, provides better positioning and fixing effects, enhances the coordination effect between the third stopper and the roller ring and spacer ring, and improves the stability and durability of the composite roller of the present invention.

[0013] Preferably, the third stopper is a hydraulic nut, the first axial portion is provided with a pressing port, the second axial portion is provided with a receiving groove for receiving a movable component, and the receiving groove is connected to the pressing port.

[0014] A pressure-pressing port is provided on an axial portion of the third stopper so as to withstand a higher pressure, thereby providing a greater pre-tightening force and ensuring the stability of the cemented carbide roller ring when in use.

[0015] Preferably, the third stopper is matched with a gasket, which is confined between the third stopper on one assembly section and a spacer ring or a roller ring on another assembly section, and the inner diameter of the gasket is smaller than the inner diameter of the adjacent spacer ring or roller ring.

[0016] The use of the gasket can provide additional support and protection between the third stopper and the roller ring or the spacer ring; enhance the stability of the structure, reduce wear, and improve the durability of the composite roller. The gasket of corresponding thickness can be selected according to actual needs and processing production errors.

[0017] Preferably, the outer diameter of the gasket is smaller than the outer diameter of the two axial parts, an adjustment ring is provided on the circumferential outer side of the gasket, the inner diameter of the adjustment ring is smaller than the outer diameter of the two axial parts, and a sealing ring is provided between the end face of one side of the adjustment ring and the third stopper on one assembly section, and between the end face of the other side of the adjustment ring and the spacer ring or roller ring on the other assembly section.

[0018] The adjustment ring and sealing ring on the gasket provide better sealing performance, prevent leakage of lubricating oil or coolant, improve the sealing performance of the roller shaft, and reduce maintenance costs and environmental pollution. Among them, the adjustment ring can adopt any existing component with adjustable axial thickness to further ensure the supporting force between the third stopper and the roller ring or spacer ring close to the first stopper, and improve the locking effect of various components on the roller shaft.

[0019] Preferably, the adjustment ring comprises two adjustment ring monomers arranged opposite to each other, and the adjacent end faces of the two adjustment ring monomers are provided with mating teeth arranged in a ring shape with uniform intervals, and the mating teeth have inclined mating surfaces. The two adjustment ring monomers are fixed by fasteners to maintain the distance between the axial end faces on both sides of the adjustment ring.

[0020] The mating teeth and fasteners on the adjustment ring provide an adjustable preload, and the pressure on the roller ring and the spacer ring can be adjusted as needed. The above-mentioned flexible preload adjustment helps to adapt to different working conditions and improve the service life of the roller ring and the spacer ring. Among them, the distance between the two adjustment ring monomers can be maintained by making the fasteners fit tightly between the two adjustment ring monomers; the relative movement of the two adjustment ring monomers can be limited by drilling holes at the mating points of the mating teeth and fitting pin-shaped fasteners at the holes; or the sheet-shaped or triangular-section fasteners of corresponding thickness can be selected according to the size of the gap between the two adjustment ring monomers to achieve the expansion and fixation of the two adjustment ring monomers.

[0021] Preferably, the circumferential outer edge sides of the two axial parts have an extended protrusion extending in the axial direction, and the circumferential inner sides of the two axial parts form a make way groove for making way for the connection between two adjacent assembly sections.

[0022] The extended protrusions and relief grooves on the backing ring provide the necessary space for assembly, simplifying the assembly process and allowing the adjacent assembly sections of the roller shaft to be ground without burrs.

[0023] Preferably, the roller rings are of the same shape and size, and a mating ring is provided on the circumferential inner side of the roller ring of the assembly section close to the second stop member in two adjacent assembly sections, and each mating ring is confined between two adjacent spacer rings or between the spacer ring and the first stop member, the second stop member or the third stop member.

[0024] The shape and size of the roller rings are the same, which improves the consistency and interchangeability of the roller rings and simplifies the maintenance and replacement process. The design of the matching ring makes the positioning of the roller ring on the assembly section more accurate.

[0025] The invention has the advantages of being easy to assemble, being able to ensure the assembly effect, and being convenient for the staff to observe and judge the degree of wear of the middle section of the composite roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A cross-sectional view of an embodiment of the present invention.

[0027] Figure 2 It is an enlarged view of the adjacent parts of two assembly sections of an embodiment of the present invention.

[0028] Figure 3 This is a schematic diagram of the structure of the adjustment ring of an embodiment of the present invention before use.

[0029] Figure 4 This is a schematic diagram of the structure of the adjustment ring after use according to an embodiment of the present invention.

[0030] Figure 5 Another schematic diagram of the structure of the adjustment ring after use according to the embodiment of the present invention. DETAILED DESCRIPTION

[0031] The present invention will be further described below based on the accompanying drawings and specific embodiments.

[0032] Depend on Figure 1 and Figure 2 As shown, this embodiment discloses a cemented carbide composite roller, comprising a roller shaft 1, a roller ring 2 and a spacer ring 3 sleeved and fixed on the roller shaft 1, a first stopper 11 and a second stopper 12 are arranged on the roller shaft 1, the roller shaft 1 itself comprises two assembly sections 10 arranged in sequence along the axial direction, the roller ring 2 and the spacer ring 3 are arranged on the assembly section 10, the assembly section 10 is located between the first stopper 11 and the second stopper 12, the outer diameter of the assembly section close to the first stopper 11 of the two adjacent assembly sections 10 is greater than the outer diameter of the assembly section close to the second stopper 12, and a third stopper 4 is arranged at the end of the assembly section close to the second stopper 12. Among them, the spacer ring and the roller ring on the assembly section close to the second stopper 12 are restricted between the third stopper 4 and the second stopper 12, and the spacer ring and the roller ring on the assembly section close to the first stopper 11 are restricted between the third stopper 4 and the first stopper 11.

[0033] The first stopper 11 of this embodiment is integrally formed on the roller shaft 1, the second stopper 12 is a locking nut and is threadedly matched with the roller shaft 1, and the third stopper 4 is a hydraulic nut and is located farther away from the second stopper 12 and is arranged in the middle of the roller shaft 1. During the pressing process, force can be applied to both sides and can be transmitted to more roller rings 2, thereby improving the use stability of the cemented carbide composite roller of this embodiment.

[0034] The third stopper 4 includes an axial first portion 41 and an axial second portion 42 along the axial direction. The axial first portion 41 is close to the second stopper 12, and the axial second portion 42 is close to the first stopper 11. The outer diameter of the axial first portion 41 is larger than the outer diameter of the axial second portion 42, and the outer diameter of the axial second portion 42 is smaller than the outer diameter of the spacer ring 3 and the outer diameter of the roller ring 2. The axial first portion 41 is provided with a pressing port 411, and the axial second portion 42 is provided with a receiving groove for accommodating the movable component 400, and the receiving groove is connected to the pressing port 411. Among them, the movable component 400 of this embodiment can adopt the movable component of the existing hydraulic nut, and the movable component includes a piston and a sealing ring. The sealing ring includes a high temperature and high pressure resistant sealing ring with a circular cross section and a sealing ring with a square cross section. The sealing rings are all made of rubber.

[0035] The third stop 4 is equipped with a gasket 5, which is restricted to the circumferential outer side of the assembly section close to the second stop 12. The gasket 5 is located between the third stop 4 and the roller ring on the assembly section close to the first stop 11. The inner diameter of the gasket 5 is smaller than the inner diameter of the roller ring adjacent to it, and the outer diameter of the gasket 5 is smaller than the outer diameter of the second axial portion 42 of the third stop 4.

[0036] Depend on Figures 2 to 5As shown, an adjustment ring is provided on the circumferential outer side of the gasket 5, and the inner diameter of the adjustment ring is smaller than the outer diameter of the second axial portion 42 of the third stopper 4. The adjustment ring includes two adjustment ring monomers 6 arranged opposite to each other, and the adjacent end faces of the two adjustment ring monomers 6 are provided with matching teeth 61 evenly spaced in a ring shape, and the matching teeth 61 have an inclined matching surface. The two adjustment ring monomers 6 are fixed by fasteners 62 to maintain the distance between the end faces of the adjustment rings on both sides. The circumferential outer edge of the gasket 5 has an extended protrusion 51 extending in the axial direction, and the connection between the two adjacent assembly sections 10 is chamfered. The circumferential inner side of the gasket 5 forms a makeshift groove for making way for the connection between the two adjacent assembly sections. The makeshift groove includes a first makeshift groove 52 and a second makeshift groove 53. The maximum inner diameter of the first makeshift groove 52 is greater than the maximum inner diameter of the second makeshift groove 53, and the first makeshift groove 52 and the second makeshift groove 53 form a step groove structure. As shown in the figure Figure 4 and Figure 5 As shown, the fastener 62 of this embodiment can be a pin-shaped or sheet-shaped style, and is fixed by being inserted and tightly fitted between two adjacent adjustment ring monomers 6.

[0037] Depend on Figure 1 and Figure 2 As shown, the present embodiment is provided with a plurality of sealing rings, including a first sealing ring 18 located on both sides of the adjustment ring, and a second sealing ring 19 located between the roller ring 2 and the spacer ring 3, and between the third stopper 4 and the roller ring 2. The radial position (height) of one first sealing ring is the same as that of the second sealing ring 19, and the radial position of the other first sealing ring is different from that of the second sealing ring 19. A first sealing ring 18 is provided between the end face of one side of the adjustment ring and the third stopper 4, and between the end face of the other side of the adjustment ring and the adjacent roller ring. The radial positions of the two first sealing rings 18 are different. The circumferential outer edge of the first sealing ring at the axial second portion 42 of the third stopper 4 is relatively located on the circumferential inner side of the circumferential outer edge of the adjustment ring monomer 6 and the other first sealing ring. The positions of the two first sealing rings on both sides of the adjustment ring are different. Under the same clearance fit, even if tilting occurs during the pressing process, the clearance change at the first sealing ring is small, and the pressure resistance of the entire structure under the same sealing ring and the same clearance fit is greatly improved.

[0038] All roller rings 2 of this embodiment are of the same shape and size, all spacer rings 3 have the same outer diameter and axial length, the inner diameter of the spacer ring on the assembly section close to the second stopper 12 is smaller than the inner diameter of the spacer ring on the assembly section close to the first stopper 11, and a matching ring 7 is provided on the inner side of the circumference of the roller ring on the assembly section close to the second stopper 12. The two matching rings 7 of this embodiment are respectively restricted between the spacer ring and the second stopper 12, and between the spacer ring and the third stopper 4. Among them, the axial length of the matching ring 7 of this embodiment is smaller than the axial length of the roller ring 2, and the axial length of the matching ring 7 is at least four fifths of the axial length of the roller ring 2. Among them, the gasket ring 5, the spacer ring 3 and the matching ring 7 are all made of Cr 12The matching ring 7 is installed between the roller ring 2 and the roller shaft 1 by means of clearance fit.

[0039] This embodiment has the advantages of being easy to assemble, ensuring the assembly effect, and being convenient for the staff to observe and judge the degree of wear of the middle section of the composite roller.

Claims

1. A cemented carbide composite roller, comprising a roller shaft, a roller ring and a spacer ring sleeved and fixed on the roller shaft, a first stopper and a second stopper are provided on the roller shaft, characterized in that: The roller shaft comprises at least two assembly sections arranged in sequence along the axial direction, the roller ring and the spacer ring are arranged on the assembly section, the assembly section is located between the first stopper and the second stopper, and the outer diameter of the assembly section close to the first stopper of the two adjacent assembly sections is greater than the outer diameter of the assembly section close to the second stopper; A third stop is provided at the end of the assembly section close to the second stop in two adjacent assembly sections, and part of the outer diameter or the entire outer diameter of the third stop is smaller than the outer diameter of the spacer ring or the roller ring. The spacer ring and the roller ring are restricted between two adjacent third stops or between the third stop and the first stop or between the third stop and the second stop.

2. A cemented carbide composite roller according to claim 1, characterized in that: The third stopper includes an axial first portion and an axial second portion along the axial direction, the outer diameter of the axial first portion is larger than the outer diameter of the axial second portion, and the outer diameter of the axial second portion is smaller than the outer diameter of the spacer ring or the roller ring.

3. A cemented carbide composite roller according to claim 2, characterized in that: The third stopper is a hydraulic nut, the first axial portion is provided with a pressure port, the second axial portion is provided with a receiving groove for receiving a movable component, and the receiving groove is communicated with the pressure port.

4. A cemented carbide composite roller according to claim 2 or 3, characterized in that: The third stopper is matched with a gasket, which is confined between the third stopper on one assembly section and a spacer ring or a roller ring on another assembly section. The inner diameter of the gasket is smaller than the inner diameter of the adjacent spacer ring or roller ring.

5. A cemented carbide composite roller according to claim 4, characterized in that: The outer diameter of the gasket is smaller than the outer diameter of the two axial parts, an adjustment ring is provided on the circumferential outer side of the gasket, the inner diameter of the adjustment ring is smaller than the outer diameter of the two axial parts, and a sealing ring is provided between the end face of one side of the adjustment ring and the third stopper on one assembly section, and between the end face of the other side of the adjustment ring and the spacer ring or roller ring on another assembly section.

6. A cemented carbide composite roller according to claim 5, characterized in that: The adjustment ring includes two adjustment ring monomers arranged opposite to each other. The adjacent end faces of the two adjustment ring monomers are provided with matching teeth arranged in a ring shape and evenly spaced. The matching teeth have inclined matching surfaces. The two adjustment ring monomers are fixed by fasteners to maintain the distance between the end faces on both sides of the adjustment ring.

7. The cemented carbide composite roller according to claim 4, characterized in that: The outer circumferential edge of the gasket ring is provided with an extending protrusion extending in the axial direction, and the inner circumferential sides of the two axial parts form a making way groove for making way for the connection between the two adjacent assembly sections.

8. A cemented carbide composite roller according to claim 1, 2 or 3, characterized in that: The roller rings are of the same shape and size. A matching ring is provided on the inner side of the roller ring of the assembly section close to the second stop member in two adjacent assembly sections. Each matching ring is confined between two adjacent spacer rings or between the spacer ring and the first stop member, the second stop member or the third stop member.

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