CN215831141U - Composite wear-resisting ring - Google Patents
Composite wear-resisting ring Download PDFInfo
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- CN215831141U CN215831141U CN202122000829.XU CN202122000829U CN215831141U CN 215831141 U CN215831141 U CN 215831141U CN 202122000829 U CN202122000829 U CN 202122000829U CN 215831141 U CN215831141 U CN 215831141U
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- resistant ring
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- 239000002131 composite material Substances 0.000 title claims abstract description 51
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 34
- 239000000956 alloy Substances 0.000 claims abstract description 34
- 239000011159 matrix material Substances 0.000 claims abstract description 18
- 230000003746 surface roughness Effects 0.000 claims abstract description 10
- 238000007789 sealing Methods 0.000 claims description 12
- 230000003068 static effect Effects 0.000 claims description 12
- 238000005552 hardfacing Methods 0.000 claims description 11
- 238000003466 welding Methods 0.000 abstract description 34
- 239000007921 spray Substances 0.000 abstract description 26
- 238000005299 abrasion Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 5
- 239000003921 oil Substances 0.000 description 28
- 238000000034 method Methods 0.000 description 16
- 238000010791 quenching Methods 0.000 description 4
- 230000000171 quenching effect Effects 0.000 description 4
- 238000007514 turning Methods 0.000 description 4
- 238000005496 tempering Methods 0.000 description 3
- 239000011324 bead Substances 0.000 description 2
- 238000005255 carburizing Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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Abstract
The utility model discloses a composite wear-resistant ring. The wear-resistant alloy compact surfacing layer comprises a wear-resistant ring matrix and a wear-resistant alloy compact surfacing layer; a local groove is formed in the local position of the contact position of the middle part of the excircle of the wear-resistant ring matrix and the framework oil seal, and the wear-resistant alloy dense surfacing layer is arranged in the local groove in the middle part of the excircle of the wear-resistant ring matrix; the surface roughness of the excircle of the composite wear-resistant ring is less than or equal to 0.8 um; the length of the abrasion-resistant alloy dense overlaying layer is more than 2.5mm larger than that of the framework oil seal in contact with the abrasion-resistant alloy dense overlaying layer. The composite wear-resistant ring disclosed by the utility model adopts an automatic spray welding technology, and only a local area needing wear resistance is subjected to spray welding of a wear-resistant alloy compact overlaying layer, so that the composite wear-resistant ring has the characteristics of high efficiency, low cost and good wear resistance. The composite wear-resistant ring can be a newly processed composite wear-resistant ring and also can be a wear-repaired composite wear-resistant ring, and has the advantages of low manufacturing cost and good wear resistance.
Description
Technical Field
The utility model belongs to the technical field of mechanical sealing, and relates to a composite wear-resistant ring.
Background
Wear rings are a common mechanical seal on the drive shaft of a cone crusher. Fig. 1 shows a cone crusher transmission shaft assembly. Power is transmitted to a gear 10 by a belt wheel 1, a taper sleeve 2 and a horizontal shaft 6, the horizontal shaft is supported by a first bearing 5 and a second bearing 7, the bearings are lubricated by oil, and a first framework oil seal 3, a first wear-resistant ring 4 and a first O-shaped ring 11 form a seal to prevent external dust from entering the bearings and prevent lubricating oil from leaking. The second framework oil seal 9, the second wear-resisting ring 8 and the second O-shaped ring 12 form a seal, and lubricating oil with low internal cleanliness is prevented from entering the bearing.
The left end face of the first wear-resisting ring 4 is in contact with the end face of the taper sleeve, the right end face of the first wear-resisting ring is in contact with the inner ring of the bearing 5, the small diameter of the inner hole is in small interference fit with the horizontal shaft 6, the large diameter of the inner hole and the first O-shaped ring 11 form static seal, and the outer ring and the sealing lip of the first framework oil seal 3 form rotary seal.
The right end face of the second wear-resistant ring 8 is contacted with the end face of the pinion, and the left end face of the second wear-resistant ring is contacted with the inner ring of the bearing 7, so that the axial force of the pinion is transmitted to the bearing. The small diameter of the inner hole is matched with the horizontal shaft 6 in a small interference mode, the large diameter of the inner hole and the second O-shaped ring 12 form static seal, and the excircle and the sealing lip of the second framework oil seal 9 form rotary seal.
The end faces and inner holes of the first wear-resistant ring 4 and the second wear-resistant ring 8 are in static fit, the stress is not large, almost no abrasion is caused in the working process, a groove is milled at the contact part of the failure form and a framework oil seal, and external dust or internal dirty oil enters the bearing to cause the bearing to be heated and damaged.
The conventional processing technology of the wear-resistant ring is to select low-carbon steel to obtain higher hardness through quenching and tempering treatment after carburization. The failure mode of the wear-resistant ring is local wear with a narrow contact area, in order to obtain the wear-resistant performance of the local area, the conventional process is to adopt a method of quenching and tempering after carburization to carry out wear-resistant treatment on the whole part, and the manufacturing cost of the part is high. That is, the existing common wear-resistant ring is obtained by adopting the quenching and tempering treatment after carburizing the whole body of carburizing steel, the hardness of the wear-resistant ring workpiece after quenching is increased, but the inner hole is not easy to process, and the production cost is high.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provide a composite wear-resistant ring with low manufacturing cost and good wear resistance.
The technical scheme of the utility model is as follows:
the utility model provides a composite wear-resistant ring, which has the technical characteristics that: the wear-resistant alloy compact surfacing layer comprises a wear-resistant ring matrix and a wear-resistant alloy compact surfacing layer; the compact hardfacing layer of the wear-resistant alloy is arranged at a local position on the excircle of the wear-resistant ring matrix.
Further, the utility model provides a composite wear-resistant ring, which also has the technical characteristics that: the outer circle of the wear-resistant ring base body is provided with a local groove at the position contacting with the framework oil seal, and the compact overlay welding layer of the wear-resistant alloy is arranged in the local groove on the outer circle of the wear-resistant ring base body.
Further, the utility model provides a composite wear-resistant ring, which also has the technical characteristics that: the compact hardfacing layer of the wear-resistant alloy is arranged at the local position of the middle part of the excircle of the wear-resistant ring matrix.
Further, the utility model provides a composite wear-resistant ring, which also has the technical characteristics that: the local position of the contact position of the middle part of the excircle of the wear-resistant ring matrix and the framework oil seal is provided with a local groove, and the compact overlaying layer of the wear-resistant alloy is arranged in the local groove in the middle part of the excircle of the wear-resistant ring matrix.
Further, the utility model provides a composite wear-resistant ring, which also has the technical characteristics that: the inner hole of the wear-resistant ring base body is a tapered hole, the diameter of one side of the inner hole is small, and the diameter of the other side of the inner hole is large; an inner hole slope and an inner hole static sealing groove are arranged at the large end (namely the end with the large inner hole diameter) of the taper hole; one side of the outer circle of the wear-resistant ring base body is provided with a large outer circle chamfer, and the other side of the outer circle of the wear-resistant ring base body is provided with a small outer circle chamfer.
Further, the utility model provides a composite wear-resistant ring, which also has the technical characteristics that: the surface roughness of the excircle of the composite wear-resistant ring is less than or equal to 0.8 um.
Further, the utility model provides a composite wear-resistant ring, which also has the technical characteristics that: the slope surface of the local groove forms an included angle of 45 degrees with the horizontal direction.
Further, the utility model provides a composite wear-resistant ring, which also has the technical characteristics that: the length of the abrasion-resistant alloy dense overlaying layer is more than 2.5mm larger than that of the framework oil seal in contact with the abrasion-resistant alloy dense overlaying layer.
Further, the utility model provides a composite wear-resistant ring, which also has the technical characteristics that: the composite wear-resistant ring is a wear-resistant ring for wear repair; the axial size (width) of the big end of the taper hole of the wear-resistant ring substrate is expanded by 0.03-0.07mm outwards on the original basis.
The method for spray-welding the wear-resistant alloy layer only on the local area needing wear resistance by adopting the automatic spray-welding technology comprises the following steps:
3.1. new composite wear-resisting ring
The composite wear-resistant ring part has a simpler structure, but the concentricity of an inner circle and an outer circle and the size precision of IT7 level are ensured, the surface roughness of the outer circle is less than or equal to 0.8um, and the composite wear-resistant ring part has higher hardness for wear resistance.
The process flow of adopting the local plasma automatic spray welding is as follows: blanking, roughly turning inner holes, outer circles and spray welding grooves on the outer circles, automatically spraying and piling outer circle grooves by plasma, finely turning inner holes, end faces and outer circle chamfers, roughly grinding the outer circles and finely grinding the outer circles.
The plasma automatic spray welding process is characterized in that preheating is performed according to the wall thickness of a part, and automatic rotating plasma spray welding is performed, and is one of key factors for obtaining a compact surfacing layer.
The size of the plasma spray welding groove (namely the local groove) is determined as shown in figure 3, and the size of the size A in the figure is determined according to the position of the lip of the framework oil seal in contact with the size A, so that the lip is ensured to be in a wear-resistant area during working. In the figure, the size of the dimension B (namely the length of the wear-resistant alloy dense overlaying layer) is determined by the lip form of the selected framework oil seal in contact with the dimension B, and the main lip and the auxiliary lip of the framework oil seal are required to be positioned in a wear-resistant area of overlaying welding and generally exceed more than 2.5 mm.
3.2 worn wear ring repair
The automatic rotating plasma spray welding has small heat affected zone and can be used for repairing parts proved by practice. The bead weld groove milled on the outer circle is the same as the newly machined part. The difference is that the inner hole has no machining allowance and needs to compensate the micro shrinkage of the inner hole caused by spray welding. There are two compensation methods:
3.2.1 before overlaying, the inner hole is processed by a compensation taper method.
As shown in figure 4, the intersection point of the 17 degree line drawn from the bottom side line of the spray welding groove and the inner hole is the starting point of the taper hole. The increase of the large end of the taper hole compensates for the shrinkage caused by spray welding.
3.2.2 mandrel positioning method
And (4) processing a special core shaft for the wear-resistant ring variety which is frequently maintained. According to the measured compensation amount, a taper mandrel is made, the wear-resistant ring to be maintained is subjected to automatic rotary spray welding under the condition of swelling, and the post-welding size of the inner hole can be ensured.
The utility model has the beneficial effects that:
the composite wear-resistant ring provided by the utility model adopts an automatic spray welding technology, only a local area needing wear resistance is sprayed and welded with a wear-resistant alloy compact overlaying layer, and the composite wear-resistant ring has the characteristics of high efficiency, low cost and good wear resistance.
The composite wear-resistant ring can be a newly processed composite wear-resistant ring and also can be a wear-repaired composite wear-resistant ring, and has the advantages of low manufacturing cost and good wear resistance.
Drawings
FIG. 1 is a schematic structural view of a cone crusher drive shaft assembly;
FIG. 2 is a schematic view of the assembled construction of the composite wear ring of the present invention;
FIG. 3 is a schematic view of a composite wear ring of the present invention;
fig. 4 is a schematic view of a repair construction of the composite wear ring of the present invention.
In the figure: 1. belt wheel 2, taper sleeve 3, first framework oil seal 4, first wear-resisting ring 5, first bearing 6, horizontal shaft 7, second bearing 8, second wear-resisting ring 9, second framework oil seal 10, gear 11, first O-ring 12, second O-ring 13, local groove 14, wear-resisting ring base body 15, wear-resisting alloy compact surfacing layer 16, inner hole slope 17, inner hole static sealing groove 18, excircle chamfer 19, framework oil seal 20, repaired inner hole conical surface C, initial point of conical hole C
Detailed Description
The utility model is further described below with reference to the following figures and examples.
Example 1
As shown in fig. 3 and fig. 2, the present embodiment provides a composite wear-resistant ring, which has the following technical features: the wear-resistant alloy surfacing layer comprises a wear-resistant ring matrix 14 and a wear-resistant alloy dense surfacing layer 15; a groove (namely a local groove 13) is arranged at the local position of the excircle middle part (the contact part with the framework oil seal 19) of the wear-resistant ring matrix 14, and the wear-resistant alloy compact surfacing layer 15 is arranged in the local groove 13 of the excircle middle part (the contact part with the framework oil seal 19) of the wear-resistant ring matrix 14. The slope surface of the local groove 13 forms an included angle of 45 degrees with the horizontal direction. The surface roughness of the excircle of the composite wear-resistant ring is less than or equal to 0.8 um. The length of the local groove 13 (namely the plasma spray welding groove) is more than 2.5mm larger than that of the framework oil seal 3.
The inner hole of the wear-resistant ring base body 14 is a tapered conical hole, the diameter of one side of the inner hole is small, the diameter of the other side of the inner hole is large, and an inner hole slope 16 and an inner hole static sealing groove 17 are arranged at the large end (namely the end with the large inner hole diameter) of the conical hole; the inner hole slope 16 is used for guiding the taper hole into the O-shaped ring and is not easy to scratch; the inner hole static sealing groove 17 is a static sealing groove for forming an O-shaped ring; one side of the outer circle of the wear-resistant ring base body 14 is provided with a large outer circle chamfer 18, so that the framework oil seal can be conveniently arranged, and the other side of the outer circle of the wear-resistant ring base body is provided with a small outer circle chamfer to remove a sharp corner.
In fig. 3, the inner hole of the wear-resistant ring base 14 has a small diameter of Φ D1 on one side and a large diameter of Φ D2 on the other side; the diameter of the excircle is phi D3; d1< D2< D3. The coaxiality of the inner circle and the outer circle of the part is 0.04 mm.
Example 2
As shown in fig. 4, 3 and 2, the present embodiment provides a composite wear-resistant ring, which is a wear-repairing wear-resistant ring, and has the following technical features: the wear-resistant alloy surfacing layer comprises a wear-resistant ring matrix 14 and a wear-resistant alloy dense surfacing layer 15; a groove (namely a local groove 13) is locally arranged at the position of the middle part of the excircle of the wear-resistant ring matrix 14 (the contact part with the framework oil seal 19), and the compact hardfacing layer 15 of the wear-resistant alloy is arranged in the local groove 13 of the middle part of the excircle of the wear-resistant ring matrix 14 (the contact part with the framework oil seal 19). The slope surface of the local groove 13 forms an included angle of 45 degrees with the horizontal direction. The surface roughness of the excircle of the composite wear-resistant ring is less than or equal to 0.8 um. The length of the abrasion-resistant alloy dense overlaying layer is more than 2.5mm larger than that of the framework oil seal in contact with the abrasion-resistant alloy dense overlaying layer.
The inner hole of the wear-resistant ring base body 14 is a tapered conical hole, the diameter of one side of the inner hole is small, the diameter of the other side of the inner hole is large, and an inner hole slope 16 and an inner hole static sealing groove 17 are arranged at the large end (namely the end with the large inner hole diameter) of the conical hole; the inner hole slope 16 is used for guiding the taper hole into the O-shaped ring and is not easy to scratch; the inner hole static sealing groove 17 is a static sealing groove for forming an O-shaped ring; one side of the outer circle of the wear-resistant ring base body 14 is provided with a large outer circle chamfer 18, so that the framework oil seal can be conveniently arranged, and the other side of the outer circle of the wear-resistant ring base body is provided with a small outer circle chamfer to remove a sharp corner.
In fig. 3, the inner hole of the wear-resistant ring base 14 has a small diameter of Φ D1 on one side and a large diameter of Φ D2 on the other side; the diameter of the excircle is phi D3; d1< D2< D3.
As shown in fig. 4, a 17 ° line having an angle of 17 ° with the diameter line of the inner bore is led out from the bottom side line of the spray welding groove 13, the intersection point of the 17 ° line and the inner bore is used as the starting point C of the taper hole, and the inner bore conical surface from the starting point C of the taper hole to the large end of the taper hole is a repaired inner bore conical surface 20; the increase in the large end (the end with the larger diameter) of the countersink compensates for the shrinkage caused by the spray welding. The axial size (width) of the big end of the taper hole of the wear-resistant ring matrix 14 is expanded by 0.03-0.07mm outwards on the original basis.
The method for spray-welding the wear-resistant alloy layer only on the local area needing wear resistance by adopting the automatic spray-welding technology comprises the following steps:
3.1. new processing composite wear ring (New manufacturing composite wear ring)
The composite wear-resistant ring part has a simpler structure, but the concentricity of an inner circle and an outer circle and the size precision of IT7 level are ensured, the surface roughness of the outer circle is less than or equal to 0.8um, and the composite wear-resistant ring part has higher hardness for wear resistance.
The process flow of adopting the local plasma automatic spray welding is as follows: blanking, roughly turning inner holes, outer circles and spray welding grooves on the outer circles, automatically spraying and piling outer circle grooves by plasma, finely turning inner holes, end faces and outer circle chamfers, roughly grinding the outer circles and finely grinding the outer circles.
The plasma automatic spray welding process is characterized in that preheating is performed according to the wall thickness of a part, and automatic rotating plasma spray welding is performed, and is one of key factors for obtaining a compact surfacing layer.
The size of the plasma spray welding groove (i.e. the local groove 13) is determined as shown in fig. 3, wherein the size of the size A is determined according to the position of the lip of the framework oil seal 19 which is in contact with the size A, and the lip is ensured to be in a wear-resistant area during work. In the figure, the size of the dimension B (i.e. the length of the compact hardfacing layer 15 of the wear-resistant alloy) is determined by the selected lip form of the framework oil seal 19, and the main lip and the auxiliary lip of the framework oil seal 19 with the auxiliary lip are required to be positioned in the wear-resistant area of the hardfacing, and generally exceed more than 2.5 mm. That is, the length of the local groove 13 and the length of the compact hardfacing layer 15 are greater than the length of the skeleton oil seal 19 in contact therewith by more than 2.5 mm.
In fig. 3, one side of the wear-resistant ring base 14 has a small diameter, the diameter of the inner hole is Φ D1, and the other side has a large diameter, the diameter of the inner hole is Φ D2; the diameter of the excircle is phi D3; d1< D2< D3.
As seen from figure 3, the surface roughness of the outer circle of the composite wear-resistant ring is 0.8um, and the surface roughness of the rest parts including the inner hole, the end face and the outer circle chamfer is 3.2 um.
3.2 worn wear ring repair
The automatic rotating plasma spray welding has small heat affected zone and can be used for repairing parts proved by practice. The bead weld groove milled on the outer circle is the same as the newly machined part. The difference is that the inner hole has no machining allowance and needs to compensate the micro shrinkage of the inner hole caused by spray welding. There are two compensation methods:
3.2.1 before overlaying, the inner hole is processed by a compensation taper method.
As shown in fig. 4, a 17 ° line having an angle of 17 ° with the diameter line of the inner bore is led out from the bottom side line of the spray welding groove 13, the intersection point of the 17 ° line and the inner bore is used as the starting point C of the taper hole, and the inner bore conical surface from the starting point C of the taper hole to the large end of the taper hole is a repaired inner bore conical surface 20; the increase in the large end (the end with the larger diameter) of the countersink compensates for the shrinkage caused by the spray welding. The axial size (width) of the big end of the taper hole is expanded by 0.03-0.07mm outwards on the original basis.
3.2.2 mandrel positioning method
And (4) processing a special core shaft for the wear-resistant ring variety which is frequently maintained. According to the measured compensation amount, a taper mandrel is made, the wear-resistant ring to be maintained is subjected to automatic rotary spray welding under the condition of swelling, and the post-welding size of the inner hole can be ensured.
After compensating the micro shrinkage of the inner hole, the surfacing area of the repaired piece is ground until the surface roughness is less than or equal to 0.8 um.
Claims (8)
1. A composite wear-resistant ring is characterized by comprising a wear-resistant ring matrix and a wear-resistant alloy dense overlaying layer; the compact hardfacing layer of the wear-resistant alloy is arranged at a local position on the excircle of the wear-resistant ring matrix.
2. The composite wear-resistant ring according to claim 1, wherein a local groove is formed in a local position on the outer circle of the wear-resistant ring base body where the outer circle of the wear-resistant ring base body is in contact with the framework oil seal, and the dense hardfacing layer of the wear-resistant alloy is arranged in the local groove on the outer circle of the wear-resistant ring base body.
3. The composite wear ring of claim 1, wherein the layer of dense hardfacing alloy is disposed at a localized position in the middle of the outer circumference of the wear ring matrix.
4. The composite wear-resistant ring according to claim 3, wherein a local groove is formed in a local position where the middle of the outer circle of the wear-resistant ring base body is in contact with the framework oil seal, and the dense hardfacing layer of the wear-resistant alloy is arranged in the local groove in the middle of the outer circle of the wear-resistant ring base body.
5. The composite wear ring of claim 2 or 4, wherein the inner bore of the wear ring base is a tapered bore having a smaller diameter on one side and a larger diameter on the other side; an inner hole slope and an inner hole static sealing groove are arranged at one end with a large inner hole diameter; one side of the outer circle of the wear-resistant ring base body is provided with a large outer circle chamfer, and the other side of the outer circle of the wear-resistant ring base body is provided with a small outer circle chamfer.
6. The composite wear ring of claim 2 or 4, wherein the outer circle of the composite wear ring has a surface roughness of 0.8um or less.
7. The composite wear ring of claim 2 or 4, wherein the ramp surface of the partial recess is angled at 45 degrees from horizontal.
8. The composite wear ring of claim 2 or 4, wherein the length of the layer of dense hardfacing alloy is greater than the length of the frame oil seal in contact therewith by more than 2.5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122000829.XU CN215831141U (en) | 2021-08-24 | 2021-08-24 | Composite wear-resisting ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122000829.XU CN215831141U (en) | 2021-08-24 | 2021-08-24 | Composite wear-resisting ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215831141U true CN215831141U (en) | 2022-02-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122000829.XU Active CN215831141U (en) | 2021-08-24 | 2021-08-24 | Composite wear-resisting ring |
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| Country | Link |
|---|---|
| CN (1) | CN215831141U (en) |
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2021
- 2021-08-24 CN CN202122000829.XU patent/CN215831141U/en active Active
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Effective date of registration: 20240523 Address after: No. 33 Qianjiang Road, Liuhe Town, Taicang City, Suzhou City, Jiangsu Province, 215431 Patentee after: Meikuang Machinery (Suzhou) Co.,Ltd. Country or region after: China Address before: 201809 floor 1, building 1, No. 158, Laodong Road, Jiading District, Shanghai Patentee before: Shanghai meikuang Machinery Co.,Ltd. Country or region before: China |